HTP EP-220 VWH, EP-299 VWH, EP-399 VWH, EP-301 VWH Installation, Start-up, Maintenance, Parts, Warranty

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Installation

Start-Up

Maintenance

Parts

Warranty

Elite Premier

Volume Water Heaters

EP-220 / 299 / 301 / 399 VWH Models*

* “N” Denotes Natural Gas Operation

“LP” Denotes Propane Gas Operation

“VWH” Denotes Hot Water Supply Boiler

Heat Exchanger Bears the ASME “H” Stamp

This manual must only be used by a qualied installer / service technician. Read all instructions in this manual before installing. Perform steps in the given order. Failure to do so could result in substantial property damage, severe personal injury, or death.

Improper installation, adjustment, alteration, service, or maintenance could void product warranty and cause property damage, severe personal injury, or death.

HTP reserves the right to make product changes or updates without notice and will not be held liable for typographical errors in literature.

The surfaces of these products contacted by potable (consumable) water contain less than 0.25% lead by weight as required by the Safe Drinking Water Act, Section 1417.

NOTE TO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.

272 Duchaine Blvd. New Bedford, MA 02745 www.htproducts.com

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IF THE INFORMATION IN THIS MANUAL IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLOSION MAY RESULT, CAUSING PROPERTY DAMAGE, PERSONAL INJURY, OR LOSS OF LIFE. DO NOT STORE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch.

• Do not use any phone in your building.

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the re department. Installation and service must be provided by a qualied

installer, service agency, or the gas supplier.

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The following dened terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important product information.

DANGER indicates an imminently hazardous situation which, if not avoided, will result in serious personal injury or death.

WARNING indicates a potentially hazardous situation which, if not avoided, could result in personal injury or death.

CAUTION indicates a potentially hazardous situation which, if not avoided, may result in moderate or minor personal injury.

CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may result in property damage.

NOTICE is used to address practices not related to personal injury.

Foreword

This manual is intended to be used in conjunction with other literature provided with the boiler. This includes all related control information. It is important that this manual, all other documents included in this system, and additional publications including the Code for the Installation of Heat Producing

Appliances and National Fuel Gas Code - ANSI Z223.1 (latest

versions), be reviewed in their entirety before beginning any work.

Installation should be

made in accordance with the regulations of the Authority Having Jurisdiction, local code authorities, and utility companies which pertain to this type of water heating equipment.

Authority Having Jurisdiction (AHJ) – The AHJ may be a federal, state, local government, or individual such as a re chief, re marshal, chief of a re prevention bureau, labor department or health department, building ocial or electrical inspector, or others

having statutory authority. In some circumstances, the property owner or his/her agent assumes the role, and at government installations, the commanding ocer or departmental ocial may be the AHJ.

NOTE: HTP, Inc. reserves the right to modify product technical specications and components without prior notice.

For the Installer

This boiler must be installed by qualied and licensed personnel. The installer should be guided by the instructions furnished with the boiler, and by local codes and utility company requirements. In the absence of local codes, preference should be given to the National Fuel Gas Code - ANSI Z223.1, latest version.

Installations Must Comply With:

Local, state, provincial, and national codes, laws, regulations, and ordinances.

The latest version of the National Fuel Gas Code, ANSI Z223.1, from American Gas Association Laboratories, 8501 East Pleasant Valley Road, Cleveland, OH 44131.

In Canada - CGA No. B149 (latest version), from Canadian Gas Association Laboratories, 55 Scarsdale Road, Don Mills, Ontario, Canada M3B 2R3. Also, Canadian Electrical Code, C 22.1, from Canadian Standards Association, 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6.

Code for the Installation of Heat Producing Appliances (latest

version) from American Insurance Association, 85 John Street, New York, NY 11038.

The latest version of the National Electrical Code, NFPA No. 70.

NOTE: The gas manifold and controls met safe lighting and other performance criteria when undergoing tests specied in ANSI Z21.13 - latest edition.

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The CSD-1 ASME Code, Section CW-400 requires that hot water heating and supply boilers have a) a UL 353 temperature control device, b) at least one (1) temperature-actuated control to shut o the fuel supply when system water reaches a preset operating temperature, c) a high temperature limit control that prevents the water temperature from exceeding the maximum allowable temperature by causing a safety shutdown and lockout, and d) its own sensing element and operating switch. The temperature control system integrated into the 926 control provided with this heating appliance complies with the requirements of CSD-1 Section CW-400 as a temperature operation control. The control monitors the temperature dierence between the inlet and the outlet sensor, which is aected by boiler water ow. If this temperature dierence exceeds 55°F (typically because of low water ow or very low heat load), the control will reduce the maximum fan speed. If the temperature dierence exceeds 60°F, the control will eectively sense there is little or no water ow or heat load and shut the boiler down. The controller will restart automatically once the temperature dierence has dropped below 55°F and the minimum o time (anti-cycle time) has expired. In addition, if the control senses that the outlet water temperature has reached 210°F, the boiler is put into a hard lockout and requires manual reset to restart.

Table of Contents

Part 1 - General Safety Information 5

A. Improper Combustion 5 B. Gas 5 C. When Servicing the Water Heating System 5 D. Boiler Water 5 E. Freeze Protection 5 F. Water Temperature Adjustment 6

Part 2 - Before You Start 6

A. What’s in the Box 6 B. How the Boiler Operates 6 C. Optional Equipment 7

Part 3 - Prepare the Boiler 7

A. Locating the Boiler 7 B. Flooring 8 C. Leveling 8 D. Clearances for Service Access 9 E. Residential Garage Installation 9 F. Exhaust Vent and Intake Pipe 9

1. Direct Vent of Exhaust and Intake 9

2. Indoor Combustion Air in Conned or Unconned Space 10 G. Prevent Combustion Air Contamination 10 H. Removing a Boiler from a Common Vent System 10 I. Water Chemistry Requirements* 11

Part 4 - Piping 14

A. General Plumbing Information 14 B. Relief Valve 14 C. Backow Preventer 14 D. Potable Expansion Tank 14 E. Circulators 15 F. Flow Switch Installation 15 G. Scalding 16 H. High Velocity Circulator Pump 16 I. Plumbing 18

J. Applications 19

Part 5 - Venting and Condensate Removal 21

A. General 21 B. Approved Materials for Exhaust Vent and Intake Pipe 22 C. Additional Requirements for Installation in Canada 22 D. Exhaust Vent and Intake Pipe Location 23 E. Exhaust Vent and Intake Pipe Sizing 24 F. Longer Vent Runs 24 G. Exhaust Vent and Intake Pipe Installation 24 H. Applications 25

1. Direct Vent Installation of Exhaust and Intake 25

2. Venting Through an Existing System 27

3. Indoor Combustion Air in Conned or Unconned Space28

I. Condensate Removal System 29

Part 6 - Wiring 30

A. Installation Must Comply With 30 B. Field Wiring Terminations 30 C. Field Wiring 30 D. Line Voltage Wiring for Standard Boiler 31 E. Alarm Connections 31 F. Low Voltage Connections for Standard Boiler 31 G. Tank Sensor or Mechanical Control 31 H. System / Pipe Sensor 31 I. Optional 0-10 Volt Building Control Signal 32 J. Optional UL353 Low Water Cut-O Interface Kit 32 K. Wiring of Cascade System Communication Bus 32 L. Cascade Master Pump and Sensor Wiring 32 M. Cascade Follower Pump and Sensor Wiring 32

Part 7 - Gas Connections 35

A. Gas Piping 35 B. Check Inlet Gas Pressure 36 C. Boiler Gas Valve 37

Part 8 - Start-Up Preparation 38

A. Check / Control Water Chemistry 38 B. Check for Gas Leaks 38 C. Condensate Removal 38 D. Final Checks Before Starting Boiler 38 E. Setting Up a Single Boiler 39 F. Setting Up a Cascaded System 39 G. Lockout Condition 39 H. Cascade System Programming 39

Part 9 - Start-Up Procedure 40

A. Control Overview 40 B. Navigation of the Display 40 C. Operating Instructions 41 D. Programming Boiler Settings 41 E. Programming the System Setting 42 F. System Setting Program Navigation 42 G. Resetting the Maintenance Schedule 44

Part 10 - Start-Up Procedures for the Installer 44

A. Boiler Control Status Menu 44 B. Cascade Menu 47 C. Boiler Test Mode 48

Part 11 - Troubleshooting 48

A. Boiler Error and Fault Codes 48 B. Boiler Error 48 C. Boiler Fault 48 D. User Interface Display 49

Part 12 - Maintenance 54

A. Procedures 54

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B. Combustion Chamber Coil Cleaning Instructions 54 C. Cleaning Water Side of Heat Exchanger 55 D. Maintaining the Condensate System 55

Part 13 - Installation Checklist 61

Part 14 - Maintenance Report 61

Limited Warranty 65 Maintenance Notes 67 Customer Installation Record Form 68

Part 1 - General Safety Information

This boiler is approved for indoor installations only and is not intended for use as a pool heater. Clearance to combustible materials: 0” top, bottom, sides, and back. Left side has all boiler mechanical connections. Boiler must have room for service: 24” front is minimum recommended service clearance. (A combustible door or removable panel is acceptable front clearance.) This boiler has been approved for closet installation and installation on combustible ooring. Do not install directly on carpeting. Install the boiler in a location where temperature and pressure relief valve discharge or a leak will not result in damage to the surrounding area. If such a location is not available, install an auxiliary catch pan. Use only Category IV vent systems.

Installer - Read all instructions in this manual before installing. Perform steps in the given order.

User - This manual is for use only by a qualied heating installer / service technician. Have this boiler serviced / inspected annually by a qualied service technician.

FAILURE TO ADHERE TO THE GUIDELINES ON THIS PAGE CAN RESULT IN SUBSTANTIAL PROPERTY DAMAGE, SEVERE PERSONAL INJURY, OR DEATH.

NOTE: If the boiler is exposed to the following, do not

operate. Immediately call a qualied service technician.

1. Fire

2. Damage

3. Water Failure to follow this information could result in property damage, severe personal injury, or death.

DO NOT USE THIS BOILER IF ANY PART HAS BEEN SUBMERGED IN WATER. Immediately call a qualied

service technician. The boiler MUST BE replaced if it has been submerged. Attempting to operate a boiler that has been submerged could create numerous harmful conditions, such as a potential gas leakage causing a re and/or explosion, or the release of mold, bacteria, or other harmful particulates into the air. Operating a previously submerged boiler could result in property damage, severe personal injury, or death. NOTE: Boiler damage due to ood or submersion is considered an Act of God, and IS NOT covered under product warranty. NOTE: Obey all local codes. Obtain all applicable permits before installing the boiler.

NOTE: Install all system components and piping in such a manner that does not reduce the performance of any re rated assembly. Altering any HTP, Inc. boiler with parts not manufactured by HTP, Inc. WILL INSTANTLY VOID the boiler warranty and could result in property damage, personal injury, or death.

This boiler has been designed to heat potable water ONLY. Using this boiler to heat non-potable uid WILL VOID product warranty, and could result in property damage, personal injury, or death.

Do not use this boiler for anything other than its intended purpose (as described in this manual). Doing so could result in property damage and WILL VOID product warranty. High heat sources (sources generating heat 100oF / 37oC or greater, such as stove pipes, space heaters, etc.) may damage plastic components of the boiler as well as plastic vent pipe materials. Such damages ARE NOT covered by warranty. It is recommended to keep a minimum clearance of 8” from high heat sources. Observe heat source manufacturer instructions, as well as local, state, provincial, and national codes, laws, regulations and ordinances when installing this boiler and related components near high heat sources.

A. Improper Combustion

Do not obstruct the ow of combustion and ventilating air. Adequate air is necessary for safe operation. Failure to keep the exhaust vent and combustion air intake clear of ice, snow, or other debris could result in property damage, serious personal injury, or death.

B. Gas

Should overheating or gas supply fail to shut o, turn o the manual gas control valve to the boiler.

C. When Servicing the Water Heating System

Be sure to disconnect electrical power before opening boiler cabinet or performing service. Failure to do so could result in electrical shock, property damage, serious personal injury, or death.

To avoid electric shock, disconnect electrical supply before performing maintenance.

NOTE: When inquiring about service or troubleshooting, reference the model and serial numbers from the boiler rating label.

To avoid severe burns, allow boiler and associated equipment to cool before servicing.

D. Boiler Water

Do not use petroleum-based cleaning or sealing compounds in a water heating system. Gaskets and seals in the system may be damaged. This can result in substantial property damage.

Do not use “homemade cures” or “patent medicines”. Damage to the boiler, substantial property damage, and/or serious personal injury may result.

E. Freeze Protection

NOTE: Consider piping and installation when determining boiler location.

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Failure of the boiler due to freeze related damage IS NOT covered by product warranty.

NEVER use any toxic chemical, including automotive, standard glycol antifreeze, or ethylene glycol made for hydronic (nonpotable) systems. These chemicals can attack gaskets and seals in water systems, are poisonous if consumed, and can cause personal injury or death.

UNCRATING THE BOILER - Any claims for damage or shortage in shipment must be led immediately against the transportation company by the consignee.

F. Water Temperature Adjustment

If the boiler is going to have a set temperature above 120oF, you must use an ASSE 1017 rated mixing valve to avoid severe burns or death from scalding temperatures.

Households with small children, disabled, or elderly persons may require a 120oF or lower temperature setting to prevent severe personal injury or death due to scalding.

Approximate Time / Temperature Relationships in Scalds

120

F More than 5 minutes

F 1 1/2 to 2 minutes

125

F About 30 seconds

130

F About 10 seconds

135

F Less than 5 seconds

140

F Less than 3 seconds

145

F About 1 1/2 seconds

150

F About 1 second

155

Table 1 - Approximate Time / Temperature Relationships in Scalds

Part 2 - Before You Start

VWH units must be connected to a storage tank. You must not have a direct connection of the potable water system into the heat exchanger. This could cause ow issues, short cycling, and an increase of mineral build-up in the unit. This system is designed to have incoming potable water ow through the storage tank rst, then through the heat exchanger. Damages resulting from incorrect installation or from use of products not approved by HTP, Inc. ARE NOT covered by warranty.

Remove all sides of the shipping crate of the boiler.

A. What’s in the Box

Components (and Part #) included with the boiler:

• Temperature and Pressure Gauge (7250P-499)

• Pressure Relief Valve (7450P-254)

• Intake PVC Tee with Screens

• Exhaust PVC Coupling with Screens

• Outlet Combination Fitting (220 Model - 7450P-235,

299/301 Models - 7450P-236, 399 Model - 7450P-237)

• Flow Switch and Paddles (7250P-517)

• Installation Manual and Warranty

• CSD-1 Form

• H-3 Data Sheet

B. How the Boiler Operates

Elite Premier VWH® condensing technology intelligently delivers large amounts of hot water while maximizing eciency. Outlined below are the features of the system and how they operate:

Stainless Steel Heat Exchanger

The highly ecient stainless steel heat exchanger is designed to use the cold water return from the storage tank and extract the last bit of heat before it is exhausted.

Modulating Combustion System

The combustion system modulates the output of the burner during operation to match system demand and achieve the control set point while in operation. The set point can change by internal or external signals to enhance the overall performance of the system.

Control

The integrated control system monitors the system and regulates fan speed to control boiler output. This allows the boiler to deliver only the amount of heat energy required and nothing more. The control can regulate the output of multiple boilers through its cascade system function. The cascade system is capable of connecting up to eight boilers together in such a way that they function as one boiler system. This allows for greater turn down ratios and provides systematic control of the multiple boilers in an installation to minimize downtime and maximize eciency. The cascade system works by establishing one boiler as the master and the other connected boilers as followers. The master boiler requires a sensor to provide feedback on set point temperature in order to adjust heating input from the connected boilers. Each cascaded boiler will have its own pump to provide maximum ow and control heat exchanger ow rate.

Text Display and Operational LED Light Indicators

The display allows the user to change system parameters and monitor system outputs.

Gas Valve

Senses suction from the blower, allowing gas to ow only if powered and combustion air is owing.

All Metal Integrated Venturi

Controls air and gas ow into the burner.

Burner

The high grade stainless steel burner uses premixed air and gas to provide a wide range of ring rates.

Spark Ignition

The burner is ignited by applying high voltage through the system spark electrode. The spark from the electrode ignites mixed gas o of the burner.

Supply Water Temperature Sensor

This sensor monitors the boiler outlet water temperature (System Supply). The control adjusts boiler ring rate so the supply temperature will match the boiler set point.

Return Water Temperature Sensor

This sensor monitors boiler return water temperature (System Return).

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Flue Sensor

Monitors ue temperature and adjusts ring rate.

Temperature and Pressure Gauge

Allows the user to monitor system temperature and pressure.

Electrical eld connections with terminal strips

The electrical cover allows easy access to the clearly marked line voltage and low voltage terminal strips to facilitate wiring the boiler.

Condensate Collection System

This boiler is a high eciency appliance and will produce condensate. The condensate collection system has a oat which monitors condensate level and prevents condensate from backing up into the combustion system. Inside the collection system is a built in trap which seals the combustion system from the connected drain. This condensate should be neutralized to avoid damage to the drainage system or piping.

Flow Protection

The supplied ow switch is designed to protect the boiler during low ow conditions. The boiler control also monitors ow through the heat exchanger by monitoring the return and supply sensors and will shut down the burner before overheating occurs.

0-10 Volt Input

Allows the installer to connect a BMS (Building Management System) to control the boiler.

Condensate Flue Check System

The check system prevents heat exchanger exhaust from backing up into the cabinet.

Pump Service Mode

Allows manual operation of pumps to commission system and check pump operation.

C. Optional Equipment

Optional equipment available from HTP (and Part #):

• Wall Mount Bracket (7450P-211)

• System Sensor (7700P-073)

• Indirect Tank Sensor (7250P-325)

• 3” Stainless Steel Vent Termination Kit (V1000)

• 4” Stainless Steel Vent Termination Kit (V2000)

• 6” Stainless Steel Vent Termination Kit (V3000)

• 2” PVC Concentric Vent Kit (KGAVT0501CVT)

• 3” PVC Concentric Vent Kit (KGAVT0601CVT)

• 3” Polypro Vent Kit (8400P-001)

• 3” Polypro Pipe

(33’ length # 8400P-002, 49.5’ length # 8400P-003)

• Low Water Cut-O Kit (7450P-904)

• Manual Reset High Limit (7450P-910)

• Alarm System (to monitor any failure) (7350P-602)

• 928 PC Connection Kit with Software (7450P-330)

• Condensate Neutralizer (220/299/301 Models - 7450P-

212, 399 Model - 7350P-611) NOTE: When using an optional system sensor, pipe insulation must be wrapped around it to improve temperature measurement accuracy and increase overall system eciency.

Part 3 - Prepare the Boiler

Remove all sides of the shipping crate to allow the boiler to be moved into its installation location. The boiler is also equipped with leveling feet that can be used to level the boiler properly on an uneven location surface. If surface ooring is rough, take care when moving the boiler into position, as catching the leveling feet could damage the boiler.

COLD WEATHER HANDLING - If the boiler has been stored in a very cold location (BELOW 0oF) before installation, handle with care until the components come to room temperature. Failure to do so could result in damage to the boiler. Carefully consider installation when determining boiler location. Please read the entire manual before attempting installation. Failure to properly take factors such as boiler venting, piping, condensate removal, and wiring into account before installation could result in wasted time, money, and possible property damage and personal injury.

A. Locating the Boiler

This boiler is certied for indoor use only. DO NOT INSTALL OUTDOORS. Outdoor installations ARE NOT covered by warranty. Failure to install the boiler indoors could result in property damage, severe personal injury, or death. Incorrect ambient conditions can lead to damage to the heating system and put safe operation at risk. Ensure that the installation location adheres to the information included in this manual. Failure to do so could result in property damage, serious personal injury, or death. Failure of boiler or components due to incorrect operating conditions IS NOT covered by product warranty.

This boiler must be installed upright in the vertical position as described in this manual. DO NOT attempt to install this boiler in any other orientation. Doing so will result in improper boiler operation and property damage, and could result in serious personal injury or death.

1. Installation Area (Mechanical Room) Operating Conditions

• Ensure ambient temperatures are higher than 32 and lower than 104oF / 40oC

• Prevent the air from becoming contaminated by the products, places, and conditions listed in this manual

• Avoid continuously high levels of humidity

• Never close existing ventilation openings

• Ensure a minimum 1” clearance around hot water and

exhaust vent pipes

• NOTE: To prevent condensing in the fan, it is recommended to avoid prolonged exposure to temperatures below 45

F / 0oC

This boiler has a condensate disposal system that may freeze if exposed to sustained temperatures below 32oF. Precautions should be taken to protect the condensate trap and drain lines from sustained freezing conditions. Failure to take precautions could result in property damage, severe personal injury, or death.

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CORRECT

INCORRECT

2. Check for nearby connections to:

• System water piping

• Venting connections

• Gas supply piping

• Electrical power

• Condensate drain

3. Check area around boiler. Remove any combustible materials, gasoline, and other ammable liquids.

Failure to keep the boiler area clear and free of combustible materials, liquids, and vapors can result in substantial property damage, severe personal injury, or death.

The service life of the boiler’s exposed metallic surfaces, such as the casing, as well as internal surfaces, such as the heat exchanger, are directly inuenced by proximity to damp and salty marine environments. In such areas higher concentration levels of chlorides from sea spray coupled with relative humidity can lead to degradation of boiler components. In these environments, boilers must not be installed using direct vent systems which draw outdoor air for combustion. Such boilers must be installed using room air for combustion. Indoor air will have a much lower relative humidity, and hence potential corrosion will be minimized. High heat sources (generating heat 100oF / 37oC or greater, such as boiler ue pipes, space heaters, etc.) may damage plastic components of the boiler as well as plastic vent pipe materials. Such damages ARE NOT covered by warranty. It is recommended to keep a minimum clearance of 8” from high heat sources. Observe heat source manufacturer instructions, as well as local, state, provincial, and national codes, laws, regulations, and ordinances when installing this boiler and related components near high heat sources. Locate the boiler where any leakage from the relief valve, related piping, tank, or connections will not result in damage to surrounding areas or lower oors of the building. The boiler should be located near a oor drain or installed in a drain pan. Leakage damages ARE NOT covered by warranty. Failure of the boiler or components due to incorrect operating conditions IS NOT covered by product warranty.

4. Gas control system components must be protected from dripping water during operation and service.

5. If the boiler is to replace an existing boiler, check for and correct any existing system problems, such as:

• System leaks

• Location that could cause the system and boiler to freeze

and leak

• Incorrectly sized expansion tank

6. Clean and ush system when reinstalling a boiler.

NOTE: When installing in a zero clearance location, it may not be possible to read or view some product labeling. It is recommended to make note of the boiler model and serial number.

Do not mount the boiler to a hollow wall. Mount to the studs only. Use extreme care not to drop the boiler or cause bodily injury while lifting or mounting the boiler onto the optional wall mount bracket.

Gas conversion should be performed BEFORE the boiler is installed. Carefully follow the gas conversion instructions when performing the conversion.

Failure to follow these instructions could result in property damage, severe personal injury, or death.

B. Flooring

Assure that the oor and structure of the installation location are sucient to support the full installed weight of the boiler, including water content of the heat exchanger and related piping. Failure to ensure the oor and structure of the installation location are structurally sound before installation of the boiler can result in structural failure, substantial property damage, severe personal injury, or death.

This boiler is approved for installation on combustible ooring, but must never be installed on carpeting. Installing this boiler on carpeting could result in re, property damage, severe personal injury, or death.

C. Leveling

In order for the condensate to properly ow out of the collection system, the area where you locate the boiler must be level. Location must also fully support the weight of the lled boiler.

LP-551 Rev. 3.9.16

Figure 1 - Correct and Incorrect Leveling

Page 9

D. Clearances for Service Access

Figure 2 - Recommended Service Clearances

NOTE: If you do not provide the minimum clearances shown

in Figure 2 it might not be possible to service the boiler without removing it from the space.

NOTE: A combustible door or removable panel is acceptable front clearance.

Minimum Clearances from Combustible Materials

• Hot water pipes - at least 1” from combustible materials

• Exhaust vent pipe - at least 1” from combustible

materials

likely to form condensate in the vent) and requires a special vent system designed for pressurized venting.

NOTE: The venting options described here (and further detailed in the Venting section, this manual) are the lone venting options approved for this boiler. Failure to vent the boiler in accordance with the provided venting instructions will void the warranty.

Failure to vent the boiler properly will result in serious personal injury or death.

Do not attempt to vent this boiler by any means other than those described in this manual. Doing so will void the warranty and may result in severe personal injury or death. Vents must be properly supported. Boiler exhaust and intake connections are not designed to carry heavy weight. Vent support brackets must be within 1’ of the boiler and the balance at 4’ intervals. Boiler must be readily accessible for visual inspection for rst 3’ from the boiler. Failure to properly support vents could result in property damage, severe personal injury, or death.

The exhaust discharged by this boiler may be very hot. Avoid touching or other direct contact with the exhaust gases of the vent termination assembly. Doing so could result in severe personal injury or death.

The space must be provided with combustion / ventilation air openings correctly sized for all other appliances located in the same space as the boiler. The boiler cover must be securely fastened to prevent the boiler from drawing air from the boiler room. This is particularly important if the boiler is in a room with other appliances. Failure to comply with the above warnings could result in substantial property damage, severe personal injury, or death.

All boilers eventually leak. It is recommended to install a catch pan beneath the boiler. This catch pan should be sized with a maximum depth of 2”, and a minimum diameter 2” greater than the diameter of the boiler. The catch pan should empty into an open drain line. This drain line should be 3/4” ID minimum, piped to an open drain. Failure to follow these instructions could result in property damage. Such damages ARE NOT covered by product warranty.

E. Residential Garage Installation

Precautions

If the boiler is located in a residential garage, per ANSI Z223.1:

• Install the boiler burner and ignition devices a minimum of 18” above the oor of the garage. This will ensure the burner and ignition devices are well o the oor.

• When raising the boiler ensure the entire bottom and fully lled weight of the boiler are fully supported.

• Locate or protect the boiler so it cannot be damaged by a moving vehicle.

F. Exhaust Vent and Intake Pipe

The boiler is rated ANSI Z21.13 Category IV (pressurized vent,

1. Direct Vent of Exhaust and Intake

If installing a direct vent option, combustion air must be drawn from the outdoors directly into the boiler intake and exhaust must terminate outdoors. There are three basic direct vent options detailed in this manual: 1. Side Wall Venting, 2. Roof Venting, and 3. Unbalanced Venting. Be sure to locate the boiler such that the exhaust vent and intake piping can be routed through the building and properly terminated. Dierent vent terminals can be used to simplify and eliminate multiple penetrations in the building structure (see Optional Equipment in Venting Section). The exhaust vent and intake piping lengths, routing, and termination methods must

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all comply with the methods and limits given in the Venting Section, this manual. When installing a combustion air intake from outdoors, care must be taken to utilize uncontaminated combustion air. To

prevent combustion air contamination, see Table 2.

2. Indoor Combustion Air in Conned or Unconned Space

This boiler requires fresh, uncontaminated air for safe operation and must be installed in a mechanical room where there is adequate combustion and ventilating air. NOTE: To prevent

combustion air contamination, see Table 2.

Combustion air from the indoor space can be used if the space has adequate area or when air is provided through a duct or louver to supply sucient combustion air based on the boiler input. Never obstruct the supply of combustion air to the boiler. If the boiler is installed in areas where indoor air is contaminated (see Table 2) it is imperative that the boiler be installed as direct vent so that all combustion air is taken directly from the outdoors into the boiler intake connection. Unconned space is space with volume greater than 50 cubic feet per 1,000 BTU/hr (4.8 cubic meters per kW) of the total input rating of all fuel-burning appliances installed in that space. Rooms connected directly to this space through openings not furnished with doors are considered part of the space. See Venting Section for details. Conned space is space with volume less than 50 cubic feet per 1,000 BTU/hr (4.8 cubic meters per kW) of the total input rating of all fuel-burning appliances installed in that space. Rooms connected directly to this space through openings not furnished with doors are considered part of the space. When drawing combustion air from inside a conventionally constructed building to a conned space, such space should be provided with two permanent openings: one located 6” (15 cm) below the space ceiling, the other 6” (15cm) above the space oor. Each opening should have a free area of one square inch

per 1,000 BTU/hr (22cm

/kW) of the total input of all appliances in the space, but not less than 100 square inches (645cm2). If the conned space is within a building of tight construction, air for combustion must be obtained from the outdoors as outlined in the Venting section of this manual.

When drawing combustion air from the outside into the mechanical room, care must be taken to provide adequate freeze protection.

Failure to provide an adequate supply of fresh combustion air can cause poisonous ue gases to enter the living space, resulting in severe personal injury or death. To prevent combustion air contamination, see Table 2.

G. Prevent Combustion Air Contamination

Install intake air piping for the boiler as described in the Venting Section, this manual. Do not terminate exhaust in locations that can allow contamination of intake air.

Ensure that the intake air will not contain any of the contaminants in Table 2. Contaminated air will damage the boiler, resulting in possible substantial property damage, severe personal injury, or death. For example, do not pipe intake air near a swimming pool or laundry facilities. These areas always contain contaminants.

H. Removing a Boiler from a Common Vent System

Do not install the boiler into a common vent with any other appliance. This will cause ue gas spillage or appliance malfunction, resulting in possible substantial property damage, severe personal injury, or death.

Failure to follow all instructions can result in ue gas spillage and carbon monoxide emissions, causing severe personal injury or death.

When removing an existing boiler, follow the steps below.

1. Seal any unused openings in the common venting system.

2. Visually inspect the venting system for proper size and horizontal pitch to determine if there is blockage, leakage, corrosion, or other deciencies that could cause an unsafe condition.

Products to Avoid

Spray cans containing uorocarbons

Permanent wave solutions Swimming pools

Chlorinated waxes / cleaners Metal fabrication plants

Chlorine-based swimming pool chemicals

Calcium chloride used for thawing Refrigeration repair shops

Sodium chloride used for water softening

Refrigerant leaks Auto body shops

Paint or varnish removers Plastic manufacturing plants

Hydrochloric or Muriatic acid

Cements and glues New building construction

Antistatic fabric softeners used in clothes dryers

Chlorine-type bleaches, laundry detergents, and cleaning solvents

Adhesives used to fasten building products

Table 2 - Products and Areas Likely to Have Contaminants

NOTE: DAMAGE TO THE BOILER CAUSED BY EXPOSURE TO CORROSIVE VAPORS IS NOT COVERED BY WARRANTY. (Refer to the limited warranty for complete

terms and conditions.)

3. If practical, close all building doors, windows, and doors between the space in which the boiler remains connected to the common venting system and other spaces in the building.

Areas Likely to Have

Contaminants

Dry cleaning / laundry areas

and establishments

Beauty shops

Photo processing plants

Furniture renishing areas

and establishments

Remodeling areas

Garages and workshops

LP-551 Rev. 3.9.16

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Turn on clothes dryers and any appliances not connected to the common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, at maximum speed. Do not operate a summer exhaust fan. Close all replace dampers.

4. Place in operation the appliance being inspected. Follow the lighting instructions. Adjust the thermostat so the appliance will operate continuously.

5. Test for spillage at the draft hood relief opening after 5 minutes of main burner operation. Use the ame of a match or candle or smoke from a cigarette.

6. After it has been determined that each appliance remaining connected to the common venting system properly vents when tested as outlined, return doors, windows, exhaust fans, replace dampers, and any other gas burning appliances to their previous condition of use.

7. Any improper operation of the common venting system should be corrected to conform to the National Fuel Gas Code, ANSI Z223.1. When resizing any portion of the common venting system, the system should approach the minimum size as determined using the appropriate tables in Appendix G of ANSI Z223.1.

• Sodium less than 20 mGL

• Water pH between 6.0 and 8.0

• Maintain water pH between 6.0 and 8.0. Check with

litmus paper or have it chemically analyzed by water treatment company.

• If the pH diers from above, consult local water treatment for treatment needed.

• Hardness less than 7 grains

• Consult local water treatment companies for unusually

hard water areas (above 7 grains hardness).

• Chlorine concentration less than 100 ppm

• Using chlorinated fresh water should be acceptable as

levels are typically less than 5 ppm.

• Do not connect the boiler to directly heat swimming pool or spa water.

• Do not ll boiler or operate with water containing chlorine in excess of 100 ppm.

*NOTE: It is recommended to clean the heat exchanger at least once a year to prevent lime scale buildup. To clean the heat exchanger, follow the maintenance procedure in this manual.

Hardness: Less than 7 grains Chloride levels: Less than 100 ppm pH levels: 6 - 8 TDS: Less than 2000 ppm Sodium: Less than 20 mGL

Figure 3 - CO Warning Label

I. Water Chemistry Requirements*

Chemical imbalance of the water supply may aect eciency and cause severe damage to the boiler and associated equipment. HTP recommends having water quality professionally analyzed to determine whether it is necessary to install a water softener. It is important that the water chemistry on both the domestic hot water and central heating sides are checked before installing the boiler, as water quality will aect the reliability of the system. In addition, operating temperatures above 140oF will cause the boiler to operate continuously, accelerating the build-up of lime scale and possibly shortening the service life of the boiler. Failure of a boiler due to lime scale build-up, low pH, or other chemical imbalance IS NOT covered by the warranty.

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Figure 4 - Boiler Dimensions - NOTE: All Dimensions Are Approximate - VWH in Model Number Denotes Volume Water Heater Model

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Figure 5 - Boiler Dimensions - NOTE: All Dimensions Are Approximate - VWH in Model Number Denotes Volume Water Heater Model

LP-551 Rev. 3.9.16

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Part 4 - Piping

Failure to follow the instructions in this section WILL VOID the warranty and may result in property damage, severe personal injury, or death.

Dielectric unions or galvanized steel ttings must not be used in a system with this boiler. Doing so WILL VOID the warranty. Use only copper, brass, or stainless steel ttings. Teon thread sealant must be used on all connections. DO NOT pipe this boiler with black iron, galvanized steel, steel, or lead pipe. Doing so will result in premature product failure and property damage, and WILL VOID the warranty.

Plumbing of this product should only be done by a qualied, licensed plumber in accordance with all local plumbing codes. The boiler is designed to be connected to a storage tank to supply domestic hot water. HTP oers 60/80/119/175 gallon size storage tanks in either stainless steel or glass-lined construction. These storage tanks will be directly connected to the boiler supply and return connection.

A. General Plumbing Information

The building piping system must meet or exceed the the piping requirements in this manual.

Use two wrenches when tightening water piping at boiler. Use one wrench to prevent the boiler return or supply line from turning. Failure to prevent piping connections from turning could cause damage to boiler components.

NOTE: The addition of a high temperature limiting device is important if the boiler is to be connected to a domestic hot water system. Connect the cold water supply to both the storage bottom port and the supply side of the boiler (shown in Applications, this manual). It is important that you install a ow check on the supply line of the boiler BEFORE connecting the feed line to the storage tank. This allows the cold feed to ow through the storage tank rst. It is recommended that you install shut o valves on the cold feed line for future ease of service. If there is a back ow preventer or any type of no return valve in the system, then you must install an additional tee for a suitable potable hot water expansion tank. Connect the storage tank return line to the return connection located on the boiler (shown in Applications, this manual). Then connect the storage tank hot water outlet to the hot water plumbing lines.

B. Relief Valve

Connect discharge piping to a safe disposal location following the guidelines below.

To avoid water damage or scalding due to relief valve operation:

• Discharge line must be connected to relief valve outlet and run to a safe place of disposal. Terminate the discharge line in a manner that will prevent possibility of severe burns or property damage should the relief valve discharge.

• Discharge line must be as short as possible and the same size as the valve discharge connection throughout its entire length.

• Discharge line must pitch downward from the valve and terminate at least 6” above the oor drain, making discharge clearly visible.

• The discharge line shall terminate plain, not threaded, with a material serviceable for temperatures of 375 or greater.

• Do not pipe discharge to any location where freezing could occur.

• No valve may be installed between the relief valve and boiler or in the discharge line. Do not plug or place any obstruction in the discharge line.

• Test the operation of the relief valve after lling and pressurizing the system by lifting the lever. Make sure the valve discharges freely. If the valve fails to operate correctly, immediately replace with a new properly rated relief valve.

• Test T&P valve at least once annually to ensure the waterway is clear. If valve does not operate, turn the boiler “o” and call a plumber immediately.

• Take care whenever operating relief valve to avoid scalding injury or property damage.

FAILURE TO COMPLY WITH THE ABOVE GUIDELINES COULD RESULT IN FAILURE OF RELIEF VALVE OPERATION, RESULTING IN POSSIBILITY OF SUBSTANTIAL PROPERTY DAMAGE, SEVERE PERSONAL INJURY, OR DEATH.

Do not thread a cap or plug into the relief valve or relief valve line under any circumstances! Explosion and property damage, serious injury, or death may result.

RE-INSPECTION OF T&P RELIEF VALVES: T&P valves should be inspected AT LEAST ONCE EVERY THREE YEARS, and replaced if necessary, by a licensed plumbing

contractor or qualied service technician to ensure that the product has not been aected by corrosive water conditions and to ensure that the valve and discharge line have not been altered or tampered with illegally. Certain naturally occuring conditions may corrode the valve and its components over time, rendering the valve inoperative. Such conditions can only be detected if the valve and its components are physically removed and inspected. Do not attempt to conduct an inspection on your own. Contact your plumbing contractor for a re-inspection to assure continued safety.

FAILURE TO RE-INSPECT THE T&P VALVE AS DIRECTED COULD RESULT IN UNSAFE TEMPERATURE AND/OR PRESSURE BUILD-UP WHICH CAN RESULT IN PROPERTY DAMAGE, SERIOUS PERSONAL INJURY, OR DEATH.

C. Backow Preventer

Use a backow preventer specically designed for boiler installations. This valve should be installed on the cold water ll supply line per local codes.

D. Potable Expansion Tank

A potable hot water expansion tank is required to oset heated water expansion. In most city plumbing systems, the water meter has a no return or back ow device built into the system to prevent back owing of water into city mains.

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Some local codes require back ow preventers on all incoming water supplies. The hot water expansion tank must be listed for potable water use. The expansion tank should be located on the cold inlet piping close to the boiler.

Expansion Tank and Make-Up Water

1. Ensure that the expansion tank is sized to correctly handle boiler and system water volume and temperature.

Expansion tanks must be sized according to total system volume. This includes all length of pipe, all xtures, boilers, etc. Failure to properly size for system expansion could result in wasted time, money, possible property damage, serious injury, or death.

Undersized expansion tanks cause system water to be lost from the relief valve, causing make-up water to be added. Eventual boiler failure can result due to excessive makeup water addition. SUCH FAILURE IS NOT COVERED BY

WARRANTY. DO NOT install automatic air vents on closed type expansion

tank systems. Air must remain in the system and return to the tank to provide an air cushion. An automatic air vent would cause air to leave the system, resulting in improper operation of the expansion tank.

The expansion tank must be suitable for hot potable water systems.

F. Flow Switch Installation

1. Choosing the correct ow paddle. The boiler comes with a ow switch and four ow paddles. Use the table below to determine which paddle to use with the boiler.

VWH Model Paddle Size

220 H1

299 / 301 H2

399 H3

N/A H4

Table 4 - Flow Paddle Sizing

2. Use a Phillips Head screwdriver to attach ow paddle as shown below.

3. Thread outlet combination tting onto supply outlet of boiler using pipe dope.

Expansion Tank Sizing*

VWH Model Heat Exchanger Volume (Gallons)

220 2.6

299 / 301 3.1

399 3.7

Table 3 - *Add Required Storage Tank Gallon Size to Heat Exchanger Volume - 60, 80, 119, and 175 Gallon Tanks Available

2. The expansion tank must be located as shown in Applications, this manual, or following recognized design methods. See expansion tank manufacturer’s instructions for details.

E. Circulators

Every VWH system requires special attention to circulator size to overcome pressure drop through the boiler and its related piping. All circulators installed on the VWH system must be designed for potable water installations. Boiler pressure drop is detailed in this manual.

Water temperature above 140oF requires the circulator to run continuously. Water hardness must be between 5 and 7 grains. Hardness above 7 grains will damage the heat exchanger and shorten the service life of the boiler. DO NOT use the boiler circulator in any location other than the ones shown in this manual. The boiler circulator location is selected to ensure adequate ow through the boiler. Failure to comply with this caution could result in unreliable performance and nuisance shutdowns from insucient ow.

4. Thread ow switch into outlet combination tting using pipe dope, making certain the FLOW arrow points in the correct

direction.

5. Thread relief valve into outlet combination tting using pipe dope.

6. Thread temperature and pressure gauge into outlet combination tting using pipe dope.

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7. Connect red wire from ow switch to boiler wire harness.

8. When installation is complete, power up the boiler and program set point. *Please note that these illustrations are

meant only to demonstrate installation. The installer is responsible for all equipment and detailing required by local codes.

G. Scalding

This boiler can deliver scalding water at any faucet in the system. Be careful whenever using hot water to avoid scalding injury. Certain appliances such as dishwashers and automatic clothes washers may require increased water temperatures. By setting the thermostat on this boiler to obtain the increased water temperature required by these appliances you may create the potential for scald injury.

To protect against injury, install a mixing valve in the water system. This valve will reduce point of use discharge temperatures by mixing cold and hot water in branch supply lines. Such valves are available from your local plumbing supplier.

Table 5 details the relationship of water temperature and time with regard to scald injury and may be used as a guide in determining the safest water temperature for your applications.

Approximate Time / Temperature Relationships in Scalds

120

F More than 5 minutes

F 1 1/2 to 2 minutes

125

F About 30 seconds

130

F About 10 seconds

135

F Less than 5 seconds

140

F Less than 3 seconds

145

F About 1 1/2 seconds

150

F About 1 second

155

Table 5 - Approximate Time / Temperature Relationships in Scalds

H. High Velocity Circulator Pump

Every VWH system requires special attention to pump size in order to overcome pressure drop through the boiler and its related piping. All circulators installed on the VWH system must be designed for a potable water system. In addition, the heat exchanger has a minimum total water volume that must be taken into account when sizing the circulator. Minimum ow rates are listed in the table below.

Minimum Boiler Flow Rates

VWH Model Minimum Flow (GPM)

220 14.6

299 / 301 20

399 26

Table 6 - Minimum Flow Rates

VWH Circulators and Flanges

VWH

Model

220 0013-SF3 7450P-241 1” NPT 7450P-242

299 / 301 2400-20S 7250P-605 1 1/4” NPT 7250P-603

399 2400-50S 7250P-606 1 1/2” NPT 7250P-604

Table 7 - VWH Circulators and Flanges

Circulator

VWH Circulator Kits

• 220 Model - Part # 7450P-248

• 299 / 301 Models - Part # 7450P-249

• 399 Model - Part # 7450P-250

Circulator

Part #

Flange Size

Flange

Part #

The risk of scalding increases when raising tank temperature. Use a water tempering or mixing valve when raising tank temperature to lessen the chance of scalds. Consult codes for conformance. Failure to install a temperature limiting or mixing valve and follow these instructions could result in property damage, severe personal injury, or death due to scalds.

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Heat Exchanger Pressure Drop

Flow Rate in GPM and Corresponding Pressure Drop in Feet (Δ P’)

Model 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

220 * * * * * * * * * 8’ 10’ 11.5’ 13’ 15’ 16.5’ 17’ 19’

299 / 301 * * * * * * * * * * * * * * 13’ 14’ 15’

399 * * * * * * * * * * * * * * * * *

Model 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39

220 21’ 23’ 24’ * * * * * * * * * * * * * *

299 / 301 16.5’ 18’ 20’ 22’ 24’ 26’ 29’ 33’ 36’ * * * * * * * *

399 * * * 12.9’ 13.6’ 14’ 15.7’ 17’ 18’ 19.4’ 21’ 22.5’ 26’ 28’ 31’ 34’ 39’

Table 8 - *Do not operate the boiler at these ow rates. These low or high ow rates will damage the heat exchanger or related components. Damages due to improper operation ARE NOT covered by warranty.

The chart below represents various system design temperature rise through the boiler along with respective ows and friction loss. This is provided to aid in circulator selection.

System Temperature Rise Chart

20°Δt 25°Δt 30°Δt

Model Friction Ft Flow Rate (GPM) Friction Ft Flow Rate (GPM) Friction Ft Flow Rate (GPM)

220 19’ 22 13’ 18.3 12’ 14.6

299 / 301 29’ 29 18’ 24.5

399 39’ 39 19’ 32.5 26

Table 9 - Temperature Rise, Friction Ft and Flow Rate

13’

The chart below represents the combined ow rates and pipe sizes when using multiple boilers to design the manifold system for the primary circuit. To size, simply add up the number of boilers and the required ow rates for the system design temperature. Example: (5) 220 model boilers with a design of 20°Δt degree temperature rise with each boiler having an individual ow rate of 22 GPM. To correctly size the manifold feeding these (5) boilers you would need a pipe size of 4”.

Multiple Boiler Manifold Piping

Flow Rate (GPM) 16 22 24 30 32 33 40 44 45 48 50 55 60 66 75 80 85 88 90 100 110

Pipe Dia. (In.) 2 2 1/2 3 4

Table 10 - Multiple Boiler Manifold Piping

Flow Rate (GPM) 120 132 150 160 170 179 200 210 239 240 250 255 300 340 350 400 425 510 595 680

Pipe Dia. (In.) 4 5 6

Table 11 - Multiple Boiler Manifold Piping

Figure 6 - Multiple Boiler Manifold Piping

Multiple Boiler Manifold Piping

LP-551 Rev. 3.9.16

Page 18

Water temperature above 140oF requires the circulator pump to run continuously and must have a water hardness of between 5 and 7 grains. Hardness above 7 grains will damage the heat exchanger and shorten the service life of the boiler.

Water Chemistry*

• Sodium less than 20 mGL

• Water pH between 6.0 and 8.0

• Maintain water pH between 6.0 and 8.0. Check with

litmus paper or have it chemically analyzed by water treatment company.

• If the pH diers from above, consult local water treatment for treatment needed.

• Hardness less than 7 grains

• Consult local water treatment companies for unusually

hard water areas (above 7 grains hardness).

• Chlorine concentration less than 100 ppm

• Using chlorinated fresh water should be acceptable as

levels are typically less than 5 ppm.

• Do not connect the boiler to directly heat swimming pool or spa water.

• Do not ll boiler or operate with water containing chlorine in excess of 100 ppm.

*NOTE: It is recommended to clean the heat exchanger at least once a year to prevent lime scale buildup. To clean the heat exchanger, follow the maintenance procedure in this manual.

Hardness: Less than 7 grains Chloride levels: Less than 100 ppm pH levels: 6 - 8 TDS: Less than 2000 ppm Sodium: Less than 20 mGL

Piping Components Water Heating System Piping

System piping MUST be sized per technical pipe requirements listed in Tables 10 and 11. Reducing pipe size can restrict ow rate through the boiler, causing inadvertent short cycling and poor system performance.

Check Valves

Field supplied. Check valves are recommended for installation as shown in Applications.

Isolation Valves

Field supplied. Full port ball valves are required. Failure to use full port ball valves could result in a restricted ow rate through the boiler.

Anti-Scald Mixing Valve

Field supplied. An anti-scald mixing valve is recommended when storing domestic hot water above 115°F.

Unions

Field supplied. Recommended for unit serviceability. DO NOT USE DIELECTRIC UNIONS! ONLY BRASS, COPPER, OR STAINLESS STEEL.

Pressure Relief Valve

Factory supplied on boiler. The pressure relief valve is sized to ASME specications. Storage tank may require additional relief valves depending on local codes.

Minimum VWH Pipe Sizes

220 1” NPT

299 / 301 1 1/4” NPT

399 1 1/2” NPT

Table 12 - Minimum Pipe Sizes

I. Plumbing

The boiler is designed to function in an open loop hot water supply system. We have included a temperature and pressure gauge that allows the user to monitor the system pressure and outlet temperature from the boiler. It is important to note that the boiler has a minimal amount of pressure drop and must be calculated when sizing the circulators. Install the boiler so the gas ignition system components are protected from water (dripping, spraying, etc.). Allow clearance for basic service of boiler circulator, valves and other components. Observe the minimum 1” clearance around all uninsulated hot water pipes when openings around pipes are not protected by non-combustible materials. Basic steps are listed below, with illustration that will guide you through the installation of the boiler.

1. Connect the system return marked “Boiler Return”.

2. Connect the system supply marked “Boiler Supply”.

3. Install a circulator as shown in Applications (this manual). Make sure the circulator is properly sized for the system and friction loss.

4. Install an expansion tank on the system supply. Consult the expansion tank manufacturer’s instruction manual (see Part 4, Section D for water volume) for specic information relating to expansion tank installation. Size the expansion tank for the required system volume and capacity.

5. Install a drain valve at the lowest point of the system. Note: The boiler cannot be drained completely of water without purging the unit with an air pressure of 15 PSI.

6. The relief valve and temperature and pressure gauge are included in the accessory kit. A discharge line should be installed 6” above the drain in the event of a pressure relief. The pipe size must be the same size as the relief valve outlet.

NEVER BLOCK THE OUTLET OF THE SAFETY RELIEF VALVE.

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J. Applications

Figure 7 - VWH with Storage Tank

Figure 8 - Two VWH Boilers with Storage Tank NOTES:

1. This drawing is meant to show system piping concept only.

2. Boiler circulator must be rated for open loop application. Do not use cast-iron circulators.

3. Boiler circulator(s) operate continuously.

4. Piping to the water storage tank must be at least the size of the boiler return and supply connections.

5. See this manual for minimum pipe sizing.

6. All pumps are shown with isolation anges or full port ball valves for isolation. The alternative is standard anges with full port ball valves and a separate ow check valve.

7. Install a minimum of 12 diameters of straight pipe upstream of all circulators and check valves.

8. Install vacuum relief valve in accordance with local code requirements.

9. All multiple boilers and multiple storage tanks must be installed with reverse return piping as shown.

10. Expansion tank must be rated for use with potable water.

11. Use either indirect/tank sensor or system/pipe sensor mounted on common return to the boiler.

12. Aquastat or system/pipe sensor connects to DHW sensor input on boiler.

An ASSE 1017 thermostatic mixing valve is recommended on all tanks if the hot water temperature leaving the tank is above 119oF. Failure to do so could result in substantial property damage, serious injury, or death. The piping will not support the weight of the circulators. Refer to the circulator manufacturer’s instructions to properly support the circulator. Failure to comply with these instructions could result in property damage, severe personal injury, or death.

Installer is responsible for all equipment & detailing required by local codes.

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Figure 10 - VWH Boiler with Two Storage Tanks

Figure 9 - Three VHW Boilers with Two Storage Tanks

NOTES:

1. This drawing is meant to show system piping concept only.

2. Boiler circulator must be rated for open loop application. Do not use cast-iron circulators.

3. Boiler circulator(s) operate continuously.

4. Piping to the water storage tank must be at least the size of the boiler return and supply connections.

5. See this manual for minimum pipe sizing.

6. All pumps are shown with isolation anges or full port ball valves for isolation. The alternative is standard anges with full port ball valves and a separate ow check valve.

7. Install a minimum of 12 diameters of straight pipe upstream of all circulators and check valves.

8. Install vacuum relief valve in accordance with local code requirements.

9. All multiple boilers and multiple storage tanks must be installed with reverse return piping as shown.

10. Expansion tank must be rated for use with potable water.

11. Use either indirect/tank sensor or system/pipe sensor mounted on common return to the boiler.

12. Aquastat or system/pipe sensor connects to DHW sensor input on boiler.

LP-551 Rev. 3.9.16

Installer is responsible for all equipment & detailing required by local codes.

Page 21

Part 5 - Venting and Condensate Removal

The boiler must be vented as detailed in this section. Ensure exhaust vent and intake piping complies with these instructions regarding vent system. Inspect nished exhaust vent and intake piping thoroughly to ensure all joints are well secured, airtight, and comply with all applicable code requirements, as well as the instructions provided in this manual. Failure to properly install the vent system will result in severe personal injury or death.

A. General

This boiler is certied as a “Category IV” appliance and requires a special venting system. The vent system will operate with a positive pressure in the pipe. Exhaust gases must be piped directly outdoors using the vent materials and rules outlined in these instructions. Do not connect vent connectors serving appliances vented by natural draft into any portion of mechanical draft systems operating under positive pressure. Follow the venting instructions carefully. Failure to do so will result in substantial property damage, severe personal injury, or death.

1. Installation should be made in accordance with the regulations of the Authority Having Jurisdiction, local code authorities, and utility companies which pertain to this type of water heating equipment.

2. Install the venting system in accordance with these instructions and with the National Fuel Gas Code, ANSI Z223.1/ NFPA 54, CAN/CGA B149, and / or applicable provisions of local building codes.

3. This boiler must be vented with materials, components, and systems listed and approved for Category IV appliances.

Exhaust and intake are to be piped separately. This boiler cannot share a common exhaust or intake with multiple appliances. Failure to follow these instructions will result in substantial property damage, severe personal injury, or death.

NOTE: To avoid contamination often contained in indoor air, it is best to pipe all intake combustion air directly to the outdoors. NOTE: If exhaust vent pipe system passes through an unheated space such as an alcove or attic, the space must be heated or the pipe must be insulated. The insulation must have an R value sucient to prevent freezing of the condensate.

Improper seating of vent pipe gaskets can cause eventual gasket failure and exhaust gas leakage. Ensure the exhaust vent pipe is properly beveled and seated before insertion into the ue adapter. Failure to do so could result in property damage, severe personal injury, or death.

For closet and alcove installations: CPVC, polypropylene, or stainless steel venting material MUST BE USED. Failure to follow this statement could result in product damage, severe personal injury, or death.

Due to the extreme ammability of most glues, cements, solvents, and primers used to join plastic exhaust vent and intake pipes, explosive solvent vapors must be cleared from all vent piping before start-up. Avoid using excess cement or primer, as this may pool in the vent pipes. Vent assemblies should be allowed to cure for a period of at least 8 hours before powering a connected appliance. Failure to follow these instructions will result in substantial property damage, severe personal injury, or death. It is the installers’ responsibility to understand the hazards associated with explosive solvents and take the necessary precautions to avoid these risks.

DO NOT insulate the rst 3 feet of the exhaust vent. CPVC, Polypropylene, or Stainless Steel pipe material MUST be used for the rst 3 feet of the vent run if the exhaust vent is insulated or passes through an enclosed space greater than 6”, such as a wall. The balance of the vent run can be installed with standard Schedule 40 PVC pipe. Failure to comply with this warning could result in property damage, severe personal injury, or death.

Exhaust vent adaptors are not designed as load-bearing devices, and must not be used to support exhaust vent piping. All vent pipes must be properly connected, supported, and the exhaust vent must be pitched a minimum of 1/4” per foot back to the boiler to allow drainage of condensate. Failure to properly support vent piping and follow the information in this statement could result in product damage, severe personal injury, or death.

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B. Approved Materials for Exhaust Vent and Intake Pipe

Item Material

United States Canada

PVC Schedule 40/80 ANSI / ASTM D1785

PVC-DWV* ANSI / ASTM D2665

Exhaust Vent or Intake

Pipe and Fittings

CPVC Schedule 40/80 ANSI / ASTM F441

Polypropylene UL-1738

Stainless Steel AL29-4C Certied for Category IV and Direct Vent Appliance Venting

Pipe Cement / Primer

PVC ANSI / ASTM D2564

CPVC ANSI / ASTM F493

• The exhaust and intake components installed with this boiler must be used for near boiler piping BEFORE transitioning to the approved materials listed above. DO NOT REMOVE these installed components. Doing so WILL VOID boiler warranty.

• PVC / CPVC pipe and ttings of the same diameter are considered interchangeable.

• DO NOT use Foam Core Pipe in any portion of the exhaust piping from this boiler.

• DO NOT connect PVC / CPVC to PP without an approved vent connector.

• When installing AL29-4C vent piping, install a PVC-to-stainless adapter at the boiler vent connection, and at the

termination when using a PVC termination kit. DO NOT mix AL29-4C piping from dierent manufacturers unless using adapters specically designed for the purpose by the manufacturer.

• A double wall vent may be used when using stainless steel vent material in a freezing climate.

• *PVC-DWV may be used for air intake applications ONLY.

• Contact the venting material manufacturer if there is any question about the applicability of the proposed venting

material.

Failure to follow these directions will result in substantial property damage, severe personal injury, or death.

Table 13 - Approved Materials for Exhaust Vent and Intake Pipe

Standards for Installation In:

PVC, CPVC, and PP Venting Must

be ULC-S636 Certied. IPEX is

an approved manufacturer in

Canada.

IPEX System 636 Cements and

Primers

DO NOT mix components from dierent venting systems without proper adapters. The vent system could fail, causing leakage of ue products into the living space. Use only the approved pipe and tting materials, and primer and cement specically designed for the material used, as listed in the above table. Failure to do so could result in property damage, serious injury, or death.

High heat sources (generating heat 100oF / 37oC or greater, such as boiler ue pipes, space heaters, etc.) may damage plastic components of the boiler as well as plastic vent pipe materials. Such damages ARE NOT covered by warranty. It is recommended to keep a minimum clearance of 8” from high heat sources. Observe heat source manufacturer instructions, as well as local, state, provincial, and national codes, laws, regulations, and ordinances when installing this boiler and related components near high heat sources.

NOTE: The use of double-wall vent or insulated material for the combustion air intake pipe is recommended in cold climates to prevent the condensation of airborne moisture in the incoming combustion air.

C. Additional Requirements for Installation in Canada

1. Installations must be made with a vent pipe system certied to ULC-S636. IPEX is an approved vent manufacturer in Canada supplying vent material listed to ULC-S636. Additionally, you may use AL29-4C stainless steel venting to comply with Canadian requirements.

2. The rst three (3) feet of vent pipe from the boiler ue outlet must be readily accessible for visual inspection.

3. The components of the certied vent system must not be interchanged with other vent systems or unlisted pipe / ttings. Cellular foam core piping may be used on air inlet piping only.

You must not use “B” vent in an exhaust application. “B” vent is for intake applications ONLY. Using “B” vent in an exhaust application will result in serious injury or death.

LP-551 Rev. 3.9.16

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D. Exhaust Vent and Intake Pipe Location

E I

Area Where Terminal Is Not Permitted

Intake Pipe Terminal

Exhaust Vent Terminal

Figure 11 - Exit Terminals for Direct Vent Systems - ANSI Z223.1 / NFPA 54 for US and CAN/CSA B149.1 for Canada

DETERMINE EXHAUST VENT AND INTAKE PIPE LOCATION – NOTES: INSTALLATIONS IN THE UNITED STATES A. Provide a minimum of 1 foot clearance from the bottom of the

exhaust vent and intake pipe above the expected snow accumulation level. Snow removal may be necessary to maintain clearance. B. Provide a minimum of 1 foot distance from exhaust vent termination to any door, operable window, or gravity intake into any building. C. Provide a minimum of 1 foot distance from exhaust vent termination to any permanently closed door or window. D. Provide a minimum of 4 feet vertical clearance from the exhaust vent to all roof overhangs. E. Locating exhaust vent termination near roof overhangs will result in the formation of icicles in freezing weather, and could result in blockage of the exhaust vent. To prevent icicles from forming, maintain 4 feet vertical clearance from the exhaust vent to all roof overhangs. F. Provide 4 feet clearance from the outside corner of vertical walls, chimneys, etc., as well as horizontal corners created by roof overhangs. G. Provide 6 feet clearance from the inside corner of vertical walls, chimneys, etc., as well as horizontal corners created by roof overhangs. H. Provide 4 feet clearance from center line within a height of 15 feet above electrical meters, gas meters, gas regulators, relief equipment, exhaust fans and inlets. I. Provide 4 feet horizontal clearance from electrical meters, gas meters, gas regulators, relief equipment, exhaust fans and inlets. In no case shall the exit terminal be above or below the aforementioned equipment unless the 4 foot horizontal distance is maintained. J. This boiler vent system shall terminate at least 3 feet (0.9 m) above any forced air intake located within 10 ft (3 m). NOTE: This does not apply to the combustion air intake of a directvent appliance. K. When venting with a two pipe system, maximum distance between exhaust vent and intake pipe is 6 feet (1.8 m). Minimum distance between exhaust vent and intake pipe on single direct vented appliance is 10” (0.255 m) center-to-center. Minimum distance between exhaust vents and intake pipes on multiple boilers is 10” (0.255 m) center-to-center. L. When adjacent to a public walkway, locate exit terminal at least 7 feet above grade.

In addition:

• Total length of vent piping shall not exceed the limits specied in this manual.

• The vent piping for this direct vented appliance is approved for zero clearance to combustible construction.

• The ue products coming from the exhaust vent will create a large plume when the boiler is in operation. Avoid venting in areas that will aect neighboring buildings or be considered objectionable.

• DO NOT locate exhaust vent or intake pipe in a parking area where machinery may damage the pipe.

• DO NOT locate the exhaust vent or intake pipe terminals under a porch, balcony, or veranda.

• Avoid terminating exhaust vents near shrubs, air conditioners, or other objects that will obstruct the exhaust stream.

• DO NOT vent over a public walkway. Condensate could drip or freeze and create a nuisance or hazard.

• NOTE: Due to potential moisture build-up, sidewall venting may not be the preferred venting option. Carefully consider

venting installation and location to save time and cost.

INSTALLATIONS IN CANADA NOTE: Canadian installation must comply with the CAN/CSA B149.1

code and applicable local codes and supersede the restrictions for the United States outlined in this section.

It is required to insert the provided exhaust and intake screens into the vent terminations to prevent blockage caused by debris or birds. Failure to keep terminations clear could result in property damage, severe personal injury, or death. The building owner is responsible for keeping the exhaust and intake terminations free of snow, ice, or other potential blockages, as well as scheduling routing maintenance. Failure to keep the vent piping terminations clear and properly maintain the boiler could result in property damage, severe personal injury, or death. For each oor containing bedroom(s), a carbon monoxide detector and alarm shall be placed in the living area outside the bedrooms, as well as in the room that houses the boiler. Detectors and alarms shall comply with NFPA 720 (latest edition). Failure to comply with these requirements could result in product damage, severe personal injury, or death.

LP-551 Rev. 3.9.16

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E. Exhaust Vent and Intake Pipe Sizing

1. The exhaust vent and intake pipe size is 3” for 220 models and 4” for 299 - 399 models.

2. The maximum total equivalent length of exhaust vent and intake pipe should not exceed 200 feet.

a. The equivalent length of elbows, tees, and other ttings are listed in the Friction Loss Table.

Friction Loss Equivalent in Piping and Fittings

Fittings or Piping

90 Degree Elbow* 5’ 3’ 3’

45 Degree Elbow 3’ 3’ 2’

Coupling 0’ 0’ 0’

Air Inlet Tee 0’ 0’ 0’

Straight Pipe 1’ 1’ 1’

Concentric Kit 3’ N/A N/A

V Series Vent Kit 1’ 1’ 1’

AL20 4c Vent Terminal 1’ 1’ 1’

Table 14 - *Friction loss for long radius elbow is 1 foot less. NOTE: Consult Polypropylene venting instructions for friction loss and pressure drop equivalents.

Equivalent Feet

3” 4” 6”

b. For example: If the exhaust vent is 3” in diameter, has two 90o elbows, and 10 feet of PVC pipe we will calculate: Exhaust Vent Equivalent Length = (2x5) + 10 = 20 feet. Further, if the 3” intake pipe has two 90o elbows, one 45o elbow, and 10 feet of PVC pipe, the following calculation applies: Intake Pipe Equivalent Length = (2x5) + 3 + 10 = 23 feet. The total equivalent length is 43 feet, well below the maximum of 200 feet. c. Eort should be made to keep a minimum dierence in equivalent length between the exhaust vent and intake pipe.

3. The minimum total equivalent length is 16 feet.

Do not exceed the maximum lengths for vent pipes. Excessive length could result in boiler shutdown and property damage.

Failure to provide a minimum total vent length of 16 equivalent feet could result in property damage and improper product operation.

F. Longer Vent Runs

The maximum total equivalent length can be extended by increasing the diameter of both the exhaust vent and intake pipes equally. However, the transitions should begin a minimum of 16 equivalent feet from the boiler. Transitions should always be made in vertical sections of pipe to prevent the condensate from pooling in the vent pipe. The maximum equivalent length for increased diameter vent pipes is 275 ft, which includes 16 ft from with boiler with a transition total of 259 ft upsize piping for longer vent runs.

Figure 12 - Extended Vent Runs

Standard

Vent Connection and

Maximum Total

Equivalent Length

3” (200’) 4” x 3” 4” (275’)

4” (200’) 6” x 4” 6” (275’)

6” (200’) 8” x 6” 8” (275’)

Table 15 - Vent Run Transition

Reducing

Coupling

Increased Vent Size

and Maximum Total

Equivalent Length

Total maximum equivalent length of increased diameter exhaust vent and intake pipe must not exceed the lengths dened in this manual. Failure to keep the total equivalent length below the maximum lengths determined in this manual will result in faulty boiler operation, substantial property damage, serious personal injury, or death.

G. Exhaust Vent and Intake Pipe Installation

All joints of positive pressure vent systems must be sealed completely to prevent leakage of ue products into the living space. Failure to do so could result in property damage, serious injury, or death.

1. Use only solid PVC, CPVC, or stainless steel pipe or a Polypropylene vent system approved for use with Category IV appliances. FOAM CORE PIPING IS NOT APPROVED FOR EXHAUST VENT APPLICATIONS. Foam core piping may be used on air inlet piping only.

2. Remove all burrs and debris from joints and ttings.

3. When using PVC or CPVC pipe, all joints must be properly cleaned, primed, and cemented. Use only cement and primer approved for use with the pipe material. Cement must conform to ASTM D2564 for PVC and ASTM F493 for CPVC pipe. NOTE: DO NOT CEMENT POLYPROPYLENE PIPE.

4. Ensure the vent is located where it will not be exposed to prevailing winds.

5. In all roof venting applications, exhaust discharge must point away from the pitch of the roof.

6. If the exhaust vent is to be terminated in a walled o area (such as a roof with a parapet wall), ensure the exhaust vent terminates a minimum of 10’ from nearest wall and extends level with or above the top of the wall. This will ensure ue gas does does not get trapped and possibly recirculated into the intake air pipe, which could contaminate the combustion air.

7. To prevent water leakage, install adequate roof ashing where the pipe enters the roof.

8. Do not locate vent over public walkways, driveways, or parking lots. Condensate could drip and freeze, resulting in a slip hazard or damage to vehicles and machinery.

9. Due to potential moisture build-up, sidewall venting may

LP-551 Rev. 3.9.16

Page 25

not be the preferred venting option. To save time and cost,

6/23/15

TWO PIPE SIDEWALL VENTING WITH TEE (INTAKE)

AND COUPLING (EXHAUST)

carefully consider venting installation and location.

10. Horizontal lengths of exhaust vent must slope back towards the boiler not less than ¼” per foot to allow condensate to drain from the vent pipe.

11. The exhaust vent must terminate where vapors cannot make accidental contact with people or pets, or damage shrubs or plants.

12. In vacant chimney applications, install and seal a rain cap over existing chimney openings.

13. All piping must be fully supported. Use pipe hangers at a minimum of 4 foot intervals to prevent sagging of the pipe where condensate may form.

14. Do not use the boiler to support any piping.

15. Ensure the outdoor exhaust vent termination is screened to prevent blockage caused by debris or birds.

16. Ensure the outdoor intake pipe termination is screened to prevent blockage caused by debris or birds. The following table lists optional exhaust/intake terminations available from HTP:

Description Stock Code

3” PVC Concentric Termination Kit KGAVT0601CVT

3” Stainless Steel Termination Kit V1000

4” Stainless Steel Termination Kit V2000

6” Stainless Steel Termination Kit V3000

3” Polypro Vent Kit 8400P-001

Table 16 - Optional Vent Kits

H. Applications

1. Direct Vent Installation of Exhaust and Intake

If installing a direct vent option, combustion air must be drawn from the outdoors directly into the boiler intake, and exhaust must terminate outside. There are three basic direct vent options detailed in this manual: 1. Side Wall Venting, 2. Roof Venting, and 3. Unbalanced Venting. Be sure to locate the boiler such that the exhaust vent and intake pipe can be routed through the building and properly terminated. Dierent vent terminals can be used to simplify and eliminate multiple penetrations in the building structure (see Optional Equipment in Venting Section). The exhaust vent and intake pipe lengths, routing and termination methods must all comply with the methods and limits given in the Venting section of this manual. When installing a combustion air intake from outdoors, care must be taken to utilize uncontaminated combustion air. NOTE: To prevent combustion air contamination, see Table 2.

Take extra precaution to adequately support the weight of vent pipes terminating through the roof. Failure to properly support roof terminated piping could result in property damage, serious injury, or death.

Figure 13 - Two Pipe Roof and Sidewall Venting

NOTE: These drawings are meant to demonstrate system

venting only. The installer is responsible for all equipment and detailing required by local codes.

All vent pipes must be glued, properly supported, and the exhaust pitched a minimum of 1/4” per foot back to the boiler to allow drainage of condensate. When placing support brackets on vent piping, the rst bracket must be within 1 foot of the boiler and the balance of 4 foot intervals on the vent pipe. Venting must be readily accessible for visual inspection from the rst three feet from the boiler.

LP-551 Rev. 3.9.16

Page 26

Sidewall Venting with Kit

Sidewall Venting with Concentric Vent Kit

Roof Venting with Concentric Vent Kit

SIDE VIEW

FRONT VIEW

Intake

Exhaust

FRONT VIEW

SIDE VIEW

LP-325-PP 03/03/11

Figure 14 - Venting with Optional Kits (NOT INCLUDED WITH THE BOILER)

NOTE: These drawings are meant to demonstrate system

venting only. The installer is responsible for all equipment and detailing required by local codes.

LP-551 Rev. 3.9.16

Figure 15 - Horizontal (Snorkel) Venting NOTES:

A. For every 1” of overhang, the exhaust vent must be located 1” vertical below overhang (overhang means top of building structure and not two adjacent walls [corner of building]). B. Typical installations require 12” minimum separation between bottom of exhaust outlet and top of air intake. C. Maintain 12” minimum clearance above highest anticipated snow level or grade (whichever is greater). D. Minimum 12” between vents when installing multiple vents.

E. 12” minimum beyond air intake.

Page 27

Figure 16 - Unbalanced Venting - Roof Exhaust and Sidewall

Unbalanced Flue /

Vertical Vent

Intake

NOTE: These drawings are meant to demonstrate system

venting only. The installer is responsible for all equipment and detailing required by local codes.

2. Venting Through an Existing System

This boiler may be vented through an existing unused vent system. The inner diameter of the existing vent system is utilized for the combustion air source. Two methods have been approved for such venting: Concentric Venting Through an Existing System and Venting as a Chase.

Contractors must check state and local codes before installing through an existing vent opening. State and local codes always take precedence over manufacturer’s instructions. Failure to check state and local codes before installing through an existing opening could result in property damage and add signicantly to installation costs.

If an existing venting system is converted for use with this boiler, the installer must ensure that the existing venting system is clean and free from particulate contamination that could damage the boiler. Failure to do so could result in property damage and boiler failure. Such failure IS NOT covered under warranty.

Concentric Venting Through an Existing System

NOTE: The following instructions refer only to venting through an existing vent system, and not to venting with HTP’s optional concentric vent kits. Refer to Concentric Vent Kit installation manual (LP-166) for further information on venting with the optional concentric vent kits. Concentric venting through an existing system must run vertically through the roof. See Table 17 for proper minimum vent sizing. Use only the approved venting materials specied in Table 13 for piping the system. All instructions listed in this Venting section apply. See Figures 17-1 and 17-2 for venting demonstrations.

The upper and lower vent terminations as well as all joints in the venting system must be properly sealed to ensure that all combustion air is drawn properly and exhaust does not leak from the system. Failure to properly seal the venting system will result in property damage, serious personal injury, or death.

Chase Venting Through an Existing System

When venting as a chase, follow all instructions included in this Venting section, including those in the previous Concentric Venting Through an Existing System section. See Figure 17-3 for chase venting demonstration.

Vent / Air Intake Size Minimum Existing Vent / Chase Size

3” 5”

4” 7”

Table 17 - Minimum Existing Vent / Chase Sizing

Do not install the boiler into a common existing vent with any other appliance. This will cause ue gas spillage or boiler malfunction, resulting in substantial property damage, serious personal injury, or death.

LP-551 Rev. 3.9.16

Page 28

AIR INTAKE W/ SCREEN

Exhaust

Intake

Concentric Venting Through an Existing System 1

Exhaust

Intake

Concentric Venting Through an Existing System 2

Exhaust

Intake

AIR INTAKE W/ SCREEN

EXISTING VENT

INTAKE

Chase Venting Through an Existing System 3

Intake

Exhaust

LP-325-X

DO NOT PLACE DRYER NEAR WATER HEATER OR BOILER

Figure 17 - 1, 2 - Concentric Venting Through an Existing System, 3, Chase Venting Through an Existing System NOTE: These drawings are meant to demonstrate system venting only. The installer is responsible for all equipment and detailing required by

local codes.

3. Indoor Combustion Air in Conned or Unconned Space

This boiler requires fresh, uncontaminated air for safe operation and must be installed in a mechanical room where there is adequate combustion and ventilating air. NOTE: To prevent

combustion air contamination, see Table 2.

Combustion air from the indoor space can be used if the space has adequate area or when air is provided through a duct or louver to supply sucient combustion air based on the boiler input. Never obstruct the supply of combustion air to the boiler. If the boiler is installed in areas where indoor air is contaminated (see Figure 18) it is imperative that the boiler be installed as direct vent so that all combustion air is taken directly from the outdoors into the boiler intake connection. Unconned space is space with volume greater than 50 cubic feet per 1,000 Btu/hour (4.8 cubic meters per kW) of the total input rating of all fuel-burning appliances installed in that space. Rooms connected directly to this space, through openings not furnished with doors, are considered part of the space. Conned space is space with volume less than 50 cubic feet per 1,000 Btu/hour (4.8 cubic meters per kW) of the total input rating of all fuel-burning appliances installed in that space. Rooms connected directly to this space, through openings not furnished with doors, are considered part of the space. When drawing combustion air from inside a conventionally constructed building to a conned space, such space should be provided with two permanent openings: one located 6” (15 cm) below the space ceiling, the other 6” (15cm) above the space oor. Each opening should have a free area of one square inch per 1,000 Btu/hr (22cm2/kW) of the total input of all appliances in the space, but not less than 100 square inches (645cm2). If the conned space is within a building of tight construction, air for combustion must be obtained from the outdoors as outlined in the Venting section of this manual. See Figure 19.

LP-551 Rev. 3.9.16

Figure 18 - Do Not Place Appliance Near Dryer

Page 29

BOILER OR

HEATER

INDOOR COMBUSTION AIR (SINGLE PIPE)

OUTDOOR COMBUSTION AIR (SINGLE PIPE)

BOILER

HEATER

I. Condensate Removal System

NOTE: Check with your local gas company to determine if combustion condensate disposal is permitted in your area. In the state of Massachusetts, condensate must be neutralized before entering a drain. This boiler is a high eciency appliance, and therefore produces condensate: a by-product of the combustion process. A condensate collection system with an internal oat switch monitors condensate level to prevent it from backing up into the combustion system. There is a ¾” socket connection provided to connect the outlet of the collection system to a drain or condensate pump. Condensate from the boiler is slightly acidic with a pH of 3.2 -

4.5. To avoid long term damage to the drainage system and to meet local code requirements, HTP recommends neutralizing condensate with a Condensate Neutralizer Kit (Part # 7450P212 for 80/110/150/220/299/301 models, Part # 7350P-611 for the 399 model). The neutralizer kit connects to the drain system and contains limestone chips that neutralize the pH level of the condensate. The neutralizer kit should be checked annually and the limestone chips replenished if necessary. When replacing the limestone chips, take care to ensure chips are no smaller than ½” to avoid blockage in condensate piping (refer to Figure 20 for piping of the condensate neutralizer.)

Figure 19 - Indoor and Outdoor Combustion Air - Single Pipe

Figure 20 - Condensate Piping NOTES:

1. Condensate line must be pitched at least ¼” per foot to properly drain. If this cannot be done, or a very long length of condensate hose is used, increase the condensate line to a minimum of 1” ID and place a tee in the line after the condensate neutralizer to properly reduce vacuum lock in the drain line.

2. PVC or CPVC pipe should be the only material used for condensate line. Steel, brass, copper, and other metals will be subject to corrosion or deterioration.

LP-551 Rev. 3.9.16

Page 30

3. A frozen condensate line could result in a blocked vent condition. It is very important to protect the condensate line from freezing temperatures or any type of blockage. In installations that may encounter sustained freezing conditions, the use of heat tape is recommended to avoid freezing of the condensate line. It is also recommended to bush up the condensate line size to 1” and terminate condensate discharge as close to the unit as possible. Longer condensate runs are more prone to freezing. Damages due to frozen or blocked condensate lines ARE NOT covered by warranty.

4. Support of the condensate line may be necessary to avoid blockage of the condensate ow.

5. To allow proper drainage on longer horizontal condensate runs, tubing size may need to increase to 1” and a second line vent may be required. NOTE: To clean out condensate trap, see Maintenance section.

The condensate line must remain unobstructed. If allowed to freeze in the line or obstructed in any other manner, condensate can exit from the boiler tee, resulting in potential water damage to property. When installing a condensate pump, select one approved for use with condensing boilers and furnaces. The condensate pump should have an overow switch to prevent property damage from spillage. Condensate from the boiler will be slightly acidic (pH from 3.2 to 4.5). Install a neutralizing lter if required by local codes. Is is very important that condensate piping be no smaller than 1/2”. Use a tee at the condensate connection with a branch vertically up and open to the atmosphere to prevent a vacuum that could obstruct the ow of condensate from the boiler. To prevent sagging and maintain pitch, condensate piping should be supported with pipe supports.

When installing a condensate pump, select one approved for use with condensing boilers and furnaces. The pump should have an overow switch to prevent property damage from condensate spillage.

Power to the optional condensate pump is continuous. When the boiler is powered o the condensate pump will remain on. It is important to remember to turn o the condensate pump when powering down the boiler. Failure to do so could result in property damage, severe personal injury, or death.

Part 6 - Wiring

To avoid electrical shock, turn o all power to the boiler prior to opening an electrical box within the unit. Ensure the power remains o while any wiring connections are being made. Failure to follow these instructions could result in component or product failure, serious injury, or death. Such product failure IS NOT covered by warranty. Jumping out control circuits or components WILL VOID product warranty and can result in property damage, personal injury, or death.

It is of extreme importance that this unit be properly grounded. It is very important that the building system ground is inspected by a qualied electrician prior to making this connection. Electrical power must only be turned on when the boiler is completely lled with cold water. Failure to follow these instructions could result in component or product failure, serious injury, or death.

Electrical Shock Hazard - Turn o electrical power supply at service entrance panel before making any electrical connections. Failure to follow do do so could result in serious injury, or death.

Label all wires prior to disconnecting them when servicing the boiler. Wiring errors can cause improper and dangerous operation. Failure to follow these instructions may result in property damage or personal injury.

Wiring must be NEC Class 1. If original wiring supplied with the boiler must be replaced, use only TEW 105 oC wire or equivalent. Boiler must be electrically grounded as required by the National Electrical Code, ANSI/NFPA 70 - Latest Edition.

A. Installation Must Comply With

1. National Electrical Code and any other national, state, provincial, or local codes or regulations.

2. In Canada, CSA C22.1, Canadian Electrical Code Part 1, and any local codes.

B. Field Wiring Terminations

All connections

made to the

boiler in the eld are done inside the electrical junction box located on the left side of the unit. Multiple knockout locations are available to route eld wires into and out of the electrical junction box.

Figure 21 - Knockout Locations

C. Field Wiring

The control used in the boiler is capable of directly controlling 1 pump in standard mode and 2 pumps when congured as a cascade master boiler. As a standard unit, each pump can provide a maximum of 3 amps at 120 volts. If a pump requires more than this amount of power, an external contactor or motor starter is needed. If the boiler is congured as a cascade master, the system pump output is a dry contact output capable of switching 5 amps at 120 volts, in addition to the boiler pump output sourcing 4 amps each. The electrical junction box has separate, clearly marked terminal strips for line voltage and low voltage wiring. Special jacks are provided for trouble-free cascade system wiring using standard CAT3 or CAT5 patch cables.

LP-551 Rev. 3.9.16

Page 31

D. Line Voltage Wiring for Standard Boiler

NOTE: A termination plug is included in the CAT 3 / CAT 5 Bus Connection Point, labeled J3 in Figure 22. DO NOT REMOVE THIS PLUG! Doing so will aect boiler operation and void warranty.

1. Connect the incoming power wiring to the line voltage terminal strip in the electrical junction box at terminals 120V, Neutral, Ground (shown in Figure 22).

2. A line voltage fused disconnect switch may be required, externally mounted and connected according to local codes that may apply.

3. Connect the boiler pump as shown in Figure 22 to the terminals marked 1 – (HOT), 2 – (NEUT), and 3 – (GND). The connections shown are suitable for a maximum continuous pump draw of 3 amps at 120 volts. If the pump requires more current or voltage than the 120 volts supplied, an external motor starter or contactor will be required.

E. Alarm Connections

The control includes a dry contact alarm output. This is an SPDT circuit, rated at 5 amps at 120 volts. This contact can be used to activate an alarm light or bell or notify a building management system if the boiler goes into a lockout condition. The circuit between the ALARM COM and NC terminals is closed during normal operation and the circuit

Figure 22 - VWH Control Wiring

between ALARM COM and NO is open during normal operation. The connections depicted in Figure 22 show two 120 volt lights connected to the alarm terminals. One light will be on when the boiler is in normal mode and the other light will be on when the boiler is in lockout mode.

F. Low Voltage Connections for Standard Boiler

1. All low voltage cables should enter the electrical junction box through the provided knock out holes as shown in Figure 21.

2. Connect all low voltage eld devices to the low voltage terminal strip located in the electrical junction box.

G. Tank Sensor or Mechanical Control

Connect the tank sensor or mechanical controls to the TANK SENSOR terminals (10, 11) of the low voltage terminal strip as shown in Figure 22. The control will automatically determine which type of sensor is connected and operate accordingly.

Failure to use the correct sensor may result in tank temperature being either above or below set point, and could result in decreased performance, substantial property damage, or heightened risk of injury or death due to scalds. Caution should be used to ensure neither of these terminals becomes connected to ground.

NOTE: If sensor wires are located in an area with sources of potential electromagnetic interference (EMI), the sensor wires should be shielded, or the wires routed in a grounded metal conduit. If using shielded cable, the shielding should be connected to the common ground of the boiler.

H. System / Pipe Sensor

The system/pipe sensor can be used to control the temperature of the storage tank when a tank sensor or mechanical control cannot be mounted. The system/pipe sensor would be wired into the terminals of the low voltage terminal strip as shown on Figure 22. It is important to note that when a system/pipe sensor is used, the circulating pump must be wired to operate continuously; otherwise the boiler will short cycle. The system/pipe sensor can also be used in a cascade system when the sensor is placed on the supply line of multiple boilers that feed the storage tank. This will control the temperature and modulate the ring rate of the connected boilers. The system/pipe sensor

LP-551 Rev. 3.9.16

Page 32

would then be wired into the master boiler terminals on the low voltage strip as shown on Figure 24. NOTE: If sensor wires are located in an area with sources of potential electromagnetic interference (EMI), the sensor wires should be shielded, or the wires routed in a grounded metal conduit. If using shielded cable, the shielding should be connected to the common ground of the boiler.

I. Optional 0-10 Volt Building Control Signal

1. A signal from a building management system may be connected to the boiler to enable remote control. This signal should be a 0-10 volt positive-going DC signal. When this input is enabled using the installer menu, a building control system can be used to control the set point temperature of the boiler. The control interprets the 0-10 volt signal as follows; when the signal is between 0 and 1.5 volts, the boiler will be in standby mode, not ring. When the signal rises above 1.5 volts, the boiler will ignite. As the signal continues to rise towards its maximum of 10 volts, the boiler will increase in set point temperature. See Part 10 for details on the setting of function

16.

2. Connect a building management system or other auxiliary control signal to the terminals marked 16, 0-10 VOLT + and 17, 0-10 VOLT – in the electrical junction box (shown in Figure

22). Caution should be used to ensure that the 0-10 VOLT + connection does not become connected to ground.

3. Move jumper on connection board (shown in Figure 24) from A to B.

4. See Function 17 this manual to program the 0-10 volt signal. NOTE: When a 0-10 volt building management system is installed, the return sensor temperature cannot be monitored through the appliance display.

J. Optional UL353 Low Water Cut-O Interface Kit

If an optional Low Water Cut-O (LWCO) Kit is used, the LWCO probe should be mounted into the tting provided in the outlet combination tting. Follow the complete instructions included in the kit for proper installation.

K. Wiring of Cascade System Communication Bus

1. A Cascade Bus Termination Plug has been installed on the customer connection board of this boiler. The purpose of this plug is to stabilize communication between multiple boilers and reduce electrical “noise”. See Figures 23 and 24 for Cascade Bus Termination Plug installation detail.

2. Use standard CAT3 or CAT5 computer network patch cables to connect the communication bus between each of the boilers. These cables are readily available at any oce supply, computer, electronic, department or discount home supply store in varying lengths. If you possess the skills you can also construct custom length cables.

3. It is recommended to use the shortest length cable that will reach between the boilers and create a neat installation. Do not run unprotected cables across the oor where they may become wet or damaged. Avoid running communication cables parallel and close to or against high voltage (120 volt or greater) wiring. HTP recommends that the maximum length of communication bus cables not exceed 200 feet.

4. Route the communication cables through one of the knockouts in the cabinet.

5. Connect the boilers in a daisy chain conguration as shown below. It is best to wire the boilers using the shortest wire runs rather than trying to wire them in the order that they are addressed. The communication bus jacks on the customer connection panel are interchangeable so you can use either one or both in any order to connect the cable. If you have connected the boilers to each other properly, there will be no open communication connection ports.

L. Cascade Master Pump and Sensor Wiring

1. Connect the system pump hot wire to the terminal marked 8.

2. Connect the system pump neutral to the 2 terminal and the pump ground wire to the 3 terminal.

3. Connect a jumper wire from the 120 VOLT terminal to the 9 terminal.

4. Connect the boiler pump to the terminals marked 1 (HOT), 2 (NEUT) and 3 (GND).

5. Connect system pipe sensor to terminals marked 10 and 11.

M. Cascade Follower Pump and Sensor Wiring

1. Connect the boiler pump to the terminals labeled 1 (HOT), 2 (NEUT), and 3 (GND).

2. An alarm bell or light can be connected to the alarm contacts of the follower boiler. The normally closed alarm contact may be used to turn a device o if the boiler goes into lockout mode. The alarm contacts are rated 5 amps at 120 VAC. To connect an alarm device, connect the power for the device to the ALARM COM terminal. Connect the alarm device hot wire to the ALARM NO terminal. Connect the neutral or return of the alarm device to the neutral or return of the power for the alarm device. To connect a device that should be powered o during a boiler lockout condition, follow the same instructions as above except use the ALARM NC terminal rather than the ALARM NC terminal. Note that in a cascade system the alarm output of the boiler addressed as #1 will also be active if the master boiler has a lockout condition. The alarm output of boilers addressed as 2-7 will only activate an alarm if a lockout condition occurs on that specic boiler.

Figure 23 - Cascade Termination Plug Detail

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Figure 24 - Cascade Master and Follower Wiring

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Figure 25 - Internal Connection Diagram

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Part 7 - Gas Connections

Failure to follow all precautions could result in re, explosion, severe injury, or death.

It is very important that you are connected to the type of gas noted on the rating plate. “LP” for liqueed petroleum, propane gas, or “NG” for natural or city gas. Do not do a gas conversion without an approved gas conversion kit. Follow the included instructions VERY carefully if converting the boiler. Prior to turning the gas on, all gas connections must be approved by the local gas supplier or utility, in addition to the governing authority. Failure to follow these instructions could result in property damage, serious injury, or death. The gas supply shall have a maximum inlet pressure of less than 14” w.c. (3.5 kPa), and a minimum of 3.5” w.c. (.87 kPa). The entire piping system, gas meter and regulator must be sized properly to prevent pressure drop greater than 0.5” (.12 kPa) as stated in the National Fuel Gas Code. This information is listed on the rating label.

Care must be taken when applying compound to prevent blockage or obstruction of gas ow which may aect the operation of the unit.

Support gas supply piping with hangers, not by the boiler or its accessories. The boiler gas valve and blower will not support the weight of the piping. Make sure the gas piping is protected from physical damage and freezing, where required. Failure to follow these instructions could result in gas leakage, and result in re, explosion, property damage, severe personal injury, or death.

Do not use Teon tape on gas line pipe thread. Use a pipe compound rated for use with natural and propane gases. Apply sparingly on male pipe ends, leaving the two end threads bare and ow unobstructed. Failure to follow these instructions could result in gas leakage or blockage, and result in re, explosion, property damage, severe personal injury, or death.

UL recognized fuel gas detectors are recommended in all enclosed propane and natural gas applications where there is a potential for an explosive mixture of fuel gas to accumulate. The installation of these detectors should be made in accordance with the detector manufacturer’s recommendations, and/or local laws. Failure to install fuel gas detectors in these applications could result in re, explosion, property damage, severe personal injury, or death.

The gas connection on the boiler is 3/4” for 80/110/150 models and 1” for 220/299/301/399 models. It is mandatory that this tting is used for connection to a eld fabricated drip leg as shown in the illustratioN per the National Fuel Gas Code. You must ensure that the entire gas line to the connection at the boiler is no smaller than the unit supplied connection. Once all inspections have been performed, the piping must be leak tested. If the leak test requirement is a higher test pres¬sure than the maximum inlet pressure, you must isolate the boiler from the gas line. In order to do this, shut the gas o using factory and eld-installed gas cocks. This will prevent high pressure. Failure to do so may damage the gas valve. In the event the gas valve is exposed to a pressure greater than ½ PSI, 14” w.c. (3.5 kPa), the gas valve must be replaced. Never use an open ame (match, lighter, etc.) to check gas connections.

Figure 26 - Gas Connection

A. Gas Piping

1. Run the gas supply line in accordance with all applicable codes.

2. Locate and install manual shuto valves in accordance with state and local requirements.

3. In Canada, the Manual Shuto must be identied by the installing contractor.

4. It is important to support gas piping as the unit is not designed to structurally support a large amount of weight.

5. Purge all gas lines thoroughly to avoid start up issues with air in the lines.

6. Sealing compound must be approved for gas connections.

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Never use an open ame (match or lighter) to check for gas leaks. Use a soapy solution to test connection. Failure to use a soapy solution test or check gas connection for leaks can result in substantial property damage, severe personal injury, or death.

Use two wrenches when tightening gas piping at the boiler: One to prevent the boiler gas line from turning. Failure to prevent the boiler gas connection from turning could result in damage to the gas line components, substantial property damage, severe personal injury, or death. CSA or UL listed exible gas connections can be used when installing the boiler. Flexible gas connections have dierent capacities and must be sized correctly for the connected boiler ring rates. Consult with the ex line supplier to assure the line size is adequate for the job. Follow local codes for proper installation and service requirements.

B. Check Inlet Gas Pressure

The gas valve is equipped with an inlet gas pressure tap that can be used to measure the gas pressure to the unit. To check gas pressure, perform the steps listed below:

1. IMPORTANT! Before you connect to the inlet pressure, shut o the gas and electrical power to unit.

2. Loosen the pressure tap with a small screwdriver. Refer to Figure 27 for location.

3. Each unit is equipped with a needle valve that will accept a 5/16 ID hose to connect to a digital manometer or liquid gauge to measure incoming pressure from 0-35” w.c. See Figure 27.

4. Turn on the gas and power up the unit.

5. Put the unit into manual test mode (details on test mode are in Part 10). In test mode, monitor pressure to assure it does not drop below 1 inch from its idle reading. If gas pressure is out of range or pressure drop is excessive, contact the gas utility, gas supplier, qualied installer, or service agency to determine correct action that is needed to provide proper gas pressure to the unit. If Gas Pressure is within normal range proceed to Step

6. Exit test mode, then turn power o and shut o gas supply at the manual gas valve before disconnecting the hose from the gas monitoring device. Tighten screw on the pressure tap and turn gas on. Check for leaks with soapy solution. Bubbles will appear on the pipe to indicate a leak is present.

Ensure the pressure tap screw is properly tightened to prevent gas leaks. Failure to do so could cause substantial property damage, severe personal injury, or death.

The gas piping must be sized for the proper ow and length of pipe to avoid pressure drop. The gas meter and regulator must be properly sized for the total gas load. If you experience a pressure drop greater than 1” w.c. (.87 kPa), the meter, regulator or gas line may be undersized or in need of service. You can attach a manometer to the incoming gas drip leg after removing the cap. The gas pressure must remain between

3.5” (.87 kPa) and 14” (3.5 kPa) during stand-by (static) mode and while in operating (dynamic) mode. If an in-line regulator is used, it must be a minimum of 10 feet from the boiler. It is very important that the gas line is properly purged by the gas supplier or utility. Failure to properly purge the lines, or improper line sizing, will result in ignition failure. This problem is especially noticeable in NEW LP installations and empty tank situations. This situation can also occur when a utility company shuts o service to an area to provide maintenance to their lines. This gas valve must not be replaced with a conventional gas valve under any circumstances.

DO NOT adjust or attempt to measure gas valve outlet pressure. The gas valve is factory-set for the correct outlet pressure and requires no eld adjustment. Attempts by the installer to adjust or measure the gas valve outlet pressure could result in damage to the valve and cause substantial property damage, severe personal injury, or death.

Ensure that the high gas pressure regulator is as least 6 – 10 feet upstream of the appliance. Failure to do so could result in substantial property damage, severe personal injury, or death.

Table 18 - Gas Pipe Sizing / BTU’s per Hour

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C. Boiler Gas Valve

Figure 27 - Gas Valve

Do not do a gas conversion on this boiler without an ocially approved conversion kit and instructions supplied by HTP. Failure to use a conversion kit when converting the boiler to re on Natural or Propane gas will result in extremely dangerous burner operation, leading to re, explosion, severe personal injury, or death.

Strain on the gas valve and ttings may result in vibration, premature component failure and gas leakage, and result in re, explosion, property damage, severe personal injury, or death. Adjustments to the throttle screw or oset may only be made by a qualied gas technician using a calibrated combustion analyzer capable of measuring CO2 and CO. Failure to follow this instruction could result in re, explosion, property damage, severe personal injury, or death.

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Part 8 - Start-Up Preparation

A. Check / Control Water Chemistry

Chemical imbalance of your water can cause severe damage to your boiler and associated equipment, and may also aect eciency. You may have to have your water quality professionally analyzed to determine whether you need to install a water softener. It is important that the water chemistry on both the domestic hot water and central heating sides are checked before installing the boiler, as water quality will aect the reliability of the system. Outlined below are those water quality parameters which need to be met in order for the system to operate eciently for many years. Failure of a heat exchanger due to lime scale build-up on the heating surface, low pH or other imbalance IS NOT covered by the warranty.

To assure extended service life, it is recommended to test water quality prior to installation. Listed below are some guidelines.

Do not use petroleum-based cleaning or sealing compounds in the boiler system. Damage to elastomer seals and gaskets in the system could occur, resulting in substantial property damage.

Sodium less than 20 mGL Water pH between 6.0 and 8.0

1. Maintain boiler water pH between 6.0 and 8.0. Check with litmus paper or have it chemically analyzed by a water treatment company.

2. If the pH diers from above, consult local water treatment company for treatment needed.

Hardness less than 7 grains

Consult local water treatment companies for unusually hard water areas (above 7 grains hardness).

Chlorine concentration less than 100 ppm

1. Using chlorinated fresh water should be acceptable since drinking water chlorine levels are typically less than 5 ppm.

2. Do not connect the boiler to directly heat a swimming pool or spa water.

3. Do not ll boiler or operate with water containing chlorine in excess of 100 ppm.

Hardness: Less than 7 grains Chloride Levels: Less than 100 ppm pH Levels: 6-8 TDS: Less than 2000 ppm Sodium: Less than 20 mGL

PROPANE BOILERS ONLY – The propane supplier mixes an odorant with the propane to make its presence detectable. In some instances the odorant can fade, and the gas may no longer have an odor. Before startup (and periodically thereafter), have the propane supplier verify the correct odorant level in the gas.

C. Condensate Removal

1. The boiler is a high eciency condensing boiler. Therefore, the unit has a condensate drain. Condensate uid is nothing more than water vapor, derived from combustion products, similar to that produced by an automobile when it is initially started. Condensation is slightly acidic (typically with a pH of 3 to 5) and must be piped with the correct materials. Never pipe the condensate using steel, copper, brass or other materials that will be subject to corrosion. Plastic PVC or CPVC pipe are the only approved materials. A condensate neutralizer, if required by local authorities, can be made up of lime crystals, marble or phosphate chips that will neutralize the condensate. This may be done by the installer or you may purchase a condensate neutralizer from HTP (7450P-212).

2. The boiler is equipped with a ¾ female socket weld tting connection that must be piped to a local drain. It is very important that the condensate line is sloped downward away from the boiler to a suitable inside drain. If the condensate outlet on the appliance is lower than the drain, you must use a condensate removal pump, available from HTP (554200). This pump is equipped with two leads that can be connected to an alarm or another type of warning device to alert the user of a condensate overow, which, if not corrected, could cause property damage.

3. If a long horizontal run is used, it may be necessary to create a vent in the horizontal run to prevent a vacuum lock in the condensate line.

4. Do not expose the condensate to freezing temperatures.

5. It is very important you support the condensation line to assure proper drainage.

D. Final Checks Before Starting Boiler

1. Read Startup Procedures within this manual for proper steps to start boiler. (See Startup Report to record steps for future reference.)

2. Verify the boiler and system are full of water and all system components are correctly set for operation.

B. Check for Gas Leaks

Before starting the boiler, and during initial operation, smell near the oor and around the boiler for gas odorant or any unusual odor. Remove boiler front door and smell interior of boiler enclosure. Do not proceed with startup if there is any indication of a gas leak. Repair any leaks at once.

LP-551 Rev. 3.9.16

Ensure the boiler is full of water before ring the burner. Failure to do so will damage the boiler. Such damage IS NOT covered by warranty, and could result in property damage, severe personal injury, or death.

3. Fill condensate trap with water.

4. Verify electrical connections are correct and securely attached.

5. Inspect exhaust vent and intake piping for signs of deterioration from corrosion, physical damage or sagging. Verify exhaust vent and intake piping are intact and correctly installed per Venting Section and local codes.

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E. Setting Up a Single Boiler

When power is applied to the boiler, the control rst completes a power-up systems check. During this time the combustion fan may run. The display will initially show the current boiler outlet temperature. If a fault is detected during the power-up test, the control will display the appropriate fault code. Otherwise, the display will continue to show the boiler outlet temperature and stand-by, waiting for a demand for hot water. If the temperature of the tank sensor falls below the tank set point minus the tank dierential temperature, a demand for hot water is generated by the control. When a demand for hot water is received, the control begins the following demand sequence. The boiler rst turns on the pump (if it is not wired to run continuously). Once the pump is running, the control will display LOW WATER FLOW and wait for the water ow in the system to increase to an acceptable level determined by the ow switch on the outside of the boiler. (NOTE: This step may happen very rapidly. If ow is adequate, LOW WATER FLOW may never display.) Once ow through the boiler is adequate, the control will measure the supply temperature. If it is below the set point temperature minus the ignition dierential set point, the control will ignite the burner. After the burner is lit, the control modulates the ring rate to control the supply water temperature at the set point temperature plus the supply oset temperature (installer #4) above the tank set point temperature. When the tank temperature is equal to the tank set point temperature, the control will extinguish the burner and run the combustion fan to purge gasses from the combustion chamber. In addition, the pump will run for a pump post purge interval. The control will then be in standby, waiting to process the next demand for heat. During this process, the control will extinguish the burner if it senses a dangerous or unsafe condition. If the control determines that a dangerous or unsafe condition has occurred, the control may lock out the boiler and prevent it from igniting until a maintenance person diagnoses the problem, repairs it, and resets the control. In the event that the control goes into lockout, it will show a diagnostic code on the display, illuminate the LED fault indicator, and close the alarm relay contacts to aid in recognition of the condition, diagnosis, and repair.

F. Setting Up a Cascaded System

If the boiler is part of a cascaded system the operation is somewhat dierent. The control of each boiler in a cascaded system completes its own power up system check as described above. One of the boilers in the cascade system is designated as the master boiler. After the master boiler completes its power up sequence, it checks the communication bus to see if any other boilers are present. If other boilers are present, the master control determines these follower boiler addresses. The master boiler control will recheck the bus every few seconds as long as it is powered up to update the status of the connected boilers. The control in the master boiler processes all heat demands and dictates which of the follower boilers should light and what ring rate the followers should try to achieve. When the master boiler receives a demand for heat, it determines which boiler is rst in the ring sequence and

sends that boiler a command to begin a demand sequence. That boiler will then begin a demand sequence as described above. Once the boiler ignites, the master boiler control will increase the ring rate command to that boiler until the system sensor temperature is at the tank set point temperature plus the supply oset temperature (installer #4), or that boiler is at high ring rate. If the command from the master boiler control gets to the high ring rate of the follower boiler, but the system sensor is below the required temperature, the master boiler control will then tell the next boiler in the ring sequence to begin its demand sequence. The master boiler control will then begin to ramp up the ring rate command of that boiler. This process will continue while there is a demand until all boilers in the cascade system are at high re or the desired temperature of the system sensor is reached. If the system sensor temperature reaches tank set point and installer #4 before all boilers are at high re, the master control will modulate the cascade command signal to maintain the system sensor at tank set point and installer #4 until the demand is complete. When the tank temperature is equal to the set point temperature, the demand is complete, and the master boiler control will extinguish all boilers that may be lit. If the demand decreases, the ring rate command and amount of boilers lit will decrease exactly opposite as described above. Whenever the master boiler control needs to re a follower boiler, it sends a ring rate command to that boiler. The follower boiler will respond to the command until its supply sensor temperature gets to be 5

F above the tank set point temperature plus the supply oset temperature (installer #4), at which point the individual boiler will modulate on its own so as not to overheat. As a result, it is not uncommon to see the cascade output at maximum but individual boilers ring at less than their maximum ring rate.

G. Lockout Condition

If any boilers, including the master boiler in the cascade system, are in a lockout condition, the master control will recognize the lockout condition and skip over the boiler in the ring sequence. Each boiler in the cascade system is responsible for its own safety functions. So, if any individual boiler control senses an unsafe condition, it will extinguish the burner and, if necessary, go to a lockout condition. In this way, every boiler in the system has its individual safety controls intact and operational, even if the ring of the boiler is under control of the master boiler. In the event that the system sensor fails, all boilers in the system will ignite simultaneously when there is a demand, and each boiler will individually regulate ring rates to maintain the master set point temperature (tank set point + installer #4) at the individual supply sensors built into the boiler. If this should happen, the master boiler will display an E03 fault code, indicating that the supply sensor has failed.

H. Cascade System Programming

1. If the boiler is used alone, skip this section.

2. Programming the Master Boiler:

a. Make sure there is no demand for heat being supplied to the boiler. b. Apply power to the boiler. c. Enter the system setting program navigation following instructions in Part 10 of this manual. d. Verify that cascade address function 15 is set to 0. This

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makes the master boiler address 0. NOTE: The Master Boiler MUST be addressed as 0. e. Change Cascade Mode function 23 to 926 Boilrs. This makes it the master boiler.

f. Exit the installer menu. NOTE: The temperature set point of the master must match the follower boiler set point in order for the system to operate properly.

3. Programming Follower Boilers:

NOTE: READ THE NOTES BELOW BEFORE

PROGRAMMING FOLLOWER BOILERS

• The boiler addressed as 1 will share its alarm output with the master boiler.

• It is recommended but not necessary to address boilers in the order that they are wired.

• No two boilers can have the same address.

• It is not required to use all consecutive address numbers. a. Make sure there is no demand for heat being supplied to the master boiler b. Apply power to the follower boiler you are working on. c. Enter system settings following instructions in Part 10 of

this manual

d. Set cascade address parameter 15 to 1 for the rst follower, 2 for the second follower, etc. depending on which boiler you are programming based on the above notes. e. Change “CASCADE MODE” parameter to “926 BOILRS”. This makes the boiler a follower boiler and enables all data to be transferred between boilers as needed for the system to function to full capability. f. Exit the installer menu.

NOTE: The temperature set point of the follower must match the master boiler set point in order for the system to operate properly.

Part 9 - Start-Up Procedure

FOR YOUR OWN SAFETY READ BEFORE OPERATING

1. This boiler does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.

2. BEFORE OPERATING: Smell all around the boiler area for gas. Be sure to smell next to the oor because some gas is heavier than air and will settle on the oor.

3. WHAT TO DO IF YOU SMELL GAS

• Do not try to light any boiler.

• Do not touch any electric switch, do not use any phone

in your building.

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas suppliers’ instructions.

• If you cannot reach your gas supplier, call the re department.

• Turn o the gas shuto valve (located outside the boiler) so that the handle is crosswise to the gas pipe. If the handle will not turn by hand, don’t try to force or repair it, call a qualied service technician. Force or attempted repair may result in a re or explosion.

4. Do not use this boiler if any part has been under water. Immediately call a qualied service technician to inspect the boiler and to replace any part of the control system and any gas control that has been damaged.

5. The boiler shall be installed so the gas ignition system components are protected from water (dripping, spraying, rain, etc.) during boiler operation and service (circulator replacement, condensate trap, control replacement, etc.)

Failure to follow these instructions could result in property

damage, serious personal injury, or death.

If you discover any evidence of a gas leak, shut down the boiler at once. Find the leak source with a bubble test and repair immediately. Do not start the boiler again until the leak is repaired. Failure to comply could result in substantial property damage, severe personal injury, or death.

A. Control Overview

The control is one of the primary safety devices of the boiler. It monitors the safety sensors of the boiler to assure safe and ecient operation. The control has many features associated with system design. This section addresses programming features, including Boiler Settings / System Settings / Maintenance Settings and System Diagnostics, to help in customizing your control. It is important to fully understand control capabilities before customization, as its factory defaults may already t your system design and not require any adjustment at all.

B. Navigation of the Display

The display includes a two line backlit LCD readout to provide informative messages about the operation of the boiler. Many operating parameters can be viewed and adjusted by using the six buttons on the display. The function of each button is described below. RESET – The RESET button has two functions.

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– Resets any lockout error code

– Returns the user to the default display screen. ENTER – The ENTER key is used to access parameter programming mode. To access this mode, hold down the ENTER key for more than 4 seconds. The readout will change to:

ENTER MENU CODE 000

One of the zeroes will be blinking. Use the ^ v arrow keys to change the blinking digit to the correct value. Use the < > arrow keys to select the next digit to change and again use the ^ v keys to change the value. Repeat until the correct code is entered. Press the ENTER key to accept the code entered. If the code is correct, the readout will change to the appropriate screen. If the programming code is not accepted, the readout will continue to display as shown above. ENTER is also used to enable a function for editing. After the user navigates to the desired function, the user holds down ENTER for one second. When ENTER is released, the function value will begin to blink. The function can now be changed using the ^ v keys. After the new value is displayed, the user then presses ENTER for 1 second to lock the new value of the function. The value will then stop blinking. LEFT AND RIGHT ARROW KEYS – < > are used to navigate between the default display, status display, analog and cascade displays if they are enabled. The < > keys are also used in programming modes to change between programmable functions. It is recommended you use the Menu Maps in the back of this manual and the detailed menu instructions printed in this section to help in menu navigation. UP AND DOWN ARROW KEYS – ^ v are used to navigate between the various functions displayed in the menu. After the function is enabled for editing by pushing the ENTER key, the ^ v keys are used to adjust the function upward or downward to the desired value.

C. Operating Instructions

Before operating the unit, it is important to remove the cover and verify that the gas line and water lines are connected to boiler and fully purged. If you smell gas, STOP; Follow the safety instructions listed in the rst part of this section. If you do not smell gas, follow the next steps.

1. Turn down the thermostats before applying power to the boiler. If 0–10 volt or other inputs are used, make sure that they are set so there is no call for heat while programming.

2. Turn on the power to the boiler or boilers if a cascade system used.

3. Next, check the boiler settings. Adjustment and factory defaults are outlined within this section. If a cascade system is used, it is important that all the boilers have the same boiler settings.

4. Next, check the system settings. Adjustments and factory defaults are outlined within this section. If a cascade system is used, it is important that the Master Boiler is programmed with the correct system settings.

5. Create a demand on the boiler or boilers if a cascade system is used. The user can monitor system functions when the boilers are operational.

6. If the boilers fail to start, refer to the troubleshooting section in the back of this manual.

D. Programming Boiler Settings

Boiler Setting Program Access

Note: Programming the boiler control is not possible when the boiler is ring. Make sure any input which can create a demand on the boiler, such as the tank thermostat, is turned o, so the boiler will remain idle to allow programming.

Screen Description

To access the boiler setting program, ENTER MENU CODE 000

ENTER MENU CODE 600

Table 19 - Boiler Setting Access

Boiler Setting Program Navigation Once the code is conrmed, the user can start to set the Boiler Settings. Use the arrow keys on the display to navigate through

the Boiler Settings. A blinking setting indicates the setting can be changed. To change a setting, press ENTER. Boiler settings can be increased by pressing ^ and decreased by pressing v on the display. When done, press ENTER. The setting will stop blinking and the user can move on to next setting. Press RESET to exit programming and store settings. Listed below are the boiler settings that can be programmed into the control.

Screen Description

IGNITION DIFF SET

TANK SETPOINT

120

TANK DIFF SETPOINT

TEMP DISPLAY C OR F

Table 20 - Boiler Setting Program Navigation

Clock Settings

(NOTE: The clock will reset if the boiler is powered o for more than a week.)

Screen Description

CLOCK MODE (12/24) 08/28/2009 Fr 9:42A

CLOCK HOUR 08/28/2009 Fr 10:01A

press and hold ENTER for 4 seconds

until the display shows the screen at

left.

Use the arrow keys to log in the Boiler

Menu Access Code - 600. Press ENTER

to conrm the code and access the

Boiler Setting Program navigation

menu.

Allows the user to adjust the ignition

dierential set point from 1oF to 36

(Factory Default 7

set point must be equal to or below

tank dierentials.

Adjusts the tank set point from 59oF to

180oF (Factory Default 120oF).

Adjusts the tank dierential set point

from 1oF to 18oF (Factory Default

7oF). Degrees below set point where

demand starts.

F). Degrees below

Adjusts the temperature

measurement in F = Fahrenheit to

C = Celsius (Default is Fahrenheit).

Changes the clock from 12 hour mode

(8:45 PM) to 24 hour mode (20:45). To

change to 24 hour mode, press ENTER.

The letter (A or P) after the time will

blink. Press the up or down arrow key

once and the letter will disappear.

Press ENTER to save the new setting.

Allows the user to adjust the hour

setting.

LP-551 Rev. 3.9.16

Page 42

Screen Description

CLOCK MINUTE 08/28/2009 Fr 10:01A

CLOCK DAY OF WEEK 08/28/2009 Fr 10:01A

CLOCK DATE MODE 08/28/2009 Fr 10:01A

CLOCK YEAR 08/28/2009 Fr 10:01A

CLOCK MONTH 08/28/2009 Fr 10:01A

CLOCK DATE 08/28/2009 Fr 10:01A

Table 21 - Clock Setting Screens

Adjusts the minute setting.

Adjusts the day of the week.

Allows the user to switch to European date format (2009/08/28) from US format (08/28/2009).

Adjusts the year setting.

Adjusts the month setting.

The clock is set.

NOTE: The internal clock does not adjust for daylight savings time and requires manual adjustment.

E. Programming the System Setting

System Setting Program Access

Screen Description

To access the boiler setting program, ENTER MENU CODE 000

ENTER MENU CODE 925

Table 22 - System Setting Access

press and hold ENTER for 4 seconds

until the display shows the screen at

left.

Use the arrow keys to log in the Boiler

Menu Access Code - 925. Press ENTER

to conrm the code and access the

Boiler Setting Program navigation

menu.

F. System Setting Program Navigation

Once the System Menu Access Code is conrmed, the user can begin to set the system setting menu. Use the < > keys on the display to navigate through the System Settings. To change a setting, press ENTER. System settings can be increased by pressing ^ and decreased by pressing v on the display. When done, press ENTER. The setting will stop blinking and you can move on to next setting. Press RESET to exit programming and store settings. Listed below are the boiler settings that can be programmed into the control.

Screen Description

Function 1 Factory Program Mode

This indicates that the control is MODE VWH MODE 1

Function 3 DHW Tank Max Temp

DHW TANK MAX TEMP

F 3

180

congured correctly for a volume

water heater. Do not change this

setting.

This is the maximum temperature

that can be selected in boiler settings

for the DHW tank. Factory Default is

180oF. (Range: 95oF to 180oF)

Screen Description

Function 4 Burner O Dierential

This is the amount of degrees above tank set point that the

BURNER OFF DIFF

F 4

Function 6 VWH Post Pump Time

VWH POST PUMP TIME 0 MINUTES 6

Function 7 Warm Weather Shuto

WARM WEATHER OFF

F 7

Function 8 Min Outdoor Temp

MIN OUTDOOR TEMP

F 8

Function 9 Max Supply Temp

MAX SUPPLY TEMP

F 9

190

Function 10 Max Outdoor Temp

MAX OUTDOOR TEMP

F 10

Function 11 Min Supply Temp

MIN SUPPLY TEMP

F 11

Function 12 Min Boiler Temp

MIN BOILER TEMP

F 12

Function 13 CH Post Pump Time

CH POST PUMP TIME 0 MINUTES 13

Function 14 DHW Priority

DHW PRIORITY 30 MINUTES 14

Function 15 Cascade Address

CASCADE ADDRESS 0 15

Function 16 Optional Inputs

OPTIONAL INPUT RETURN SEN 16

burner will maintain its outlet water temperature while there is a demand for heat. Factory Default is 20oF. (Range: 1oF to 45oF)

The boiler pump has the ability to post purge energy from the boiler to the tank after the set point has been achieved. Please note that running the pump for a time greater than 5 minutes may cause tank energy to be released back to the heat exchanger. Factory Default of 0 Minutes. (Range: 0 – 10 minutes)

Not applicable on this product.

Bus addressing boilers (maximum boilers allowed 8 in a cascade system). Master Boiler address is 0 and Following Boilers are addressed 1 thru 7. Default: 0 (Range: 0 – 8). NOTE: DO NOT USE ADDRESS 8.

Allows the user to select optional inputs to control or monitor the system. Default: RETURN (Range: O / Booster Board / 0-10 Volt / DHW Sensor / Return Sen).

LP-551 Rev. 3.9.16

Page 43

Screen Description

Function 17 0-10 Volt Function

Control boiler modulation through 0-10 VOLT FUNCTION TEMPERATURE 17

Function 18 Step Modulation Mode

STEP MODULATE MODE ON 18

Function 19 Boiler DHW Temp

BOILER SUPPLY DHW

F 19

180

Function 20 Water Safety Input

WATER SAFETY INPUT WATER PRESSURE 20

Function 21 Error Outdoor Sensor

ERROR OUTD SENSOR OFF 21

Function 22 Adjust Boiler Output %

ADJ HEATER OUTPUT 100% 22

Function 23 Cascade Mode

CASCADE MODE VISION 3 23

Function 24 Cascade Rotation

CASCADE ROTATION 48 HOURS 24

Function 25 Cascade DHW Mode

NOT USED NOT USED 25

Function 26 System Freeze Protection

SYS FREEZE PROT PROTECT OFF 26

Function 27 Error System Sensor

ERROR SYSTEM SENS ON 27

temperature control. Factory

Default = Temperature (Temperature

only on VWH).

Not applicable on this product.

The user can select various water

safety inputs used in the boiler

system. Default: Flow Switch

(Range: None / Low Water Cut O /

Flow Switch / Water Pressure).

Not applicable on this product.

Adjusts the boiler output down

from 100% to 50%. Factory Default:

100%. (Range: 100% – 50%)

Allows the user to select cascade

mode. Factory Default: Vision 3

(Range: 926 Boilers / Vision 3).

Sets the amount of hours before

the rst boiler in the cascade ring

rotation will be changed. NOTE: If

this is set to 0, the ring order of the

boilers will not rotate. Default: 48

hours (Range: 0 – 240 hours).

Not applicable on this product.

NOTE: This parameter is only

present if the boiler is a cascade

master. Allows the user to set the

freeze protection when a system

pump is used. Factory Default: OFF.

Selection of temperature activates

freeze protection. (Range: OFF,

F – 104oF).

-40

Sets the control to display an error

message if the system sensor is

open or shorted. NOTE: This error

does not stop the boiler (or boilers)

from running. Factory Default: ON

(Range: ON / OFF).

Function 28 Freeze Protection

FREEZE PROTECTION ON 28

Function 29 DHW Modulation Mode

DHW MODULATE MODE NORMAL MOD 29

Function 30 Extra Boiler Mode

EXTRA BOILER MODE OFF 30

Function 31 System Sensor Mode

SYSTEM SENSOR MODE OFF 31

Function 32 Service Schedule

SERVICE SCHEDULE OFF 32

Function 37 Modbus Mode

MODBUS MODE OFF 37

Function 56

O-10V A OUTPUT CONFIG POW ER B OI L 56

Allows the user to set freeze protection on the boiler. Factory Default: ON (Range: ON / OFF).

Not applicable on this product.

Allows for a non HTP boiler to be controlled when the cascade output has risen above the percent of the cascade ring rate set in this parameter. Factory Default: O (Range: 50% - 100%).

Suppresses the ‘NO FOLLOWER’ display message if the boiler is used as a cascade master boiler with no follower boilers connected. Factory Default: OFF (Range: ON / OFF).

Selects a service date or time based on the boiler run hours to program the boiler maintenance schedule. Factory Default: OFF (Range: Date or Run Hours). NOTE: Without setting this function, Functions 33/34/35/36 will not display.

Enables Modbus Mode on the appliance. Factory Default: OFF (Range: OFF, ON, AUTO). NOTE: Turning Modbus Mode “ON” will open a number of additional parameters to customize Modbus installation. See Modbus Instructions (lp-372) for details. NOTE: Turning this Mode “ON” without a connected and powered Modbus communication adapter (p/n 7350P-629) will result in improper appliance operation. Service calls associated with this ARE NOT covered by warranty.

OA1 Conguration

Controls the operation of the 0-10V A output on the Field Connection Board. Factory Default: BOIL POWER (Range: BOIL POWER / CASC POWER / FAN SPEED / ALARM / TEMPERATUR / FLAME / DO NOT USE).

The following information details the 0-10V output parameters described in Function 56 that can be read at a Building Management System. BOIL POWER - 0-10V output is proportional to boiler ring rate. 0V = Not Firing, 1.5V = Minimum Firing Rate, 10V = Maximum Firing Rate CASC POWER - When congured on the Cascade Master, 0-10V is proportional to the ring rate of the Cascaded System. 0V = Not Firing, 1.5V = Minimum Firing Rate (One Boiler Lit), 10V =

LP-551 Rev. 3.9.16

Page 44

Maximum Firing Rate of all Connected Boilers FAN SPEED - Output is proportional to boiler fan speed. 0V = Fan is O, 1.5V = Minimum Fan Speed, 10V = Maximum Fan Speed

ALARM - 0V = Alarm is O, 10V = Alarm is On TEMPERATUR - Output follows boiler temperature setting

based on outdoor reset. 0V = Minimum Boiler Temperature for Maximum Outdoor Temperature Setting. 10V = CH (or cascade) temperature setting. This number will vary with the outdoor temperature so that the user can know what setpoint temperature the boiler is trying to achieve.

FLAME - Equals boiler Flame Current. 0V = 0ua, 10V = 10ua.

Function 57

O-10V A OUTPUT OFFSET

0.0 57

Function 58

O-10V B OUTPUT CONFIG POW ER B OI L 56

Function 59

O-10V B OUTPUT OFFSET

0.0 57

Function 60

CH dT SETTING 20F 60

Function 61

OFFSTATE VOLT 0-10V A

0.0V 61

Function 62

OFFSTATE VOLT 0-10V B

0.0V 61

Table 23 - System Setting Program Navigation

OA1 Oset

This value is added to the OFFSTATE VOLT OA1 value, to determine the total voltage output required at the minimum case.

OA2 Conguration

Controls the operation of the 0-10V B output on the Field Connection Board. Factory Default: BOIL POWER (Range: BOIL POWER / CASC POWER / FAN SPEED / ALARM / TEMPERATUR / FLAME / DO NOT USE).

OA2 Oset

This value is added to the OFFSTATE VOLT OA1 value, to determine the total voltage output required at the minimum case.

CH dT Setting

This parameter is only available when DO NOT USE is selected in Function 56. DO NOT USE THIS PARAMETER. Return to Function 56 and select another parameter.

Ostate Voltage OA1

This parameter is only available when DO NOT USE is selected in Function 56. DO NOT USE THIS PARAMETER. Return to Function 56 and select another parameter.

Ostate Voltage OA2

This parameter is only available when DO NOT USE is selected in Function 58. DO NOT USE THIS PARAMETER. Return to Function 58 and select another parameter.

NOTE: For the following functions, you must have your

maintenance function turned on. To change these functions, press ENTER. The left most digit will begin to blink. Use the ^ or v arrows to change the digit. Use the < > arrow keys to switch between digits. When you’ve made your selection, press ENTER again.

Screen Description

Function 33 Year

SERVICE SCHEDULE YEAR 00/00/2000 33

SERVICE SCHEDULE 10000’s

Function 34 Month

SERVICE SCHEDULE MONTH 00/00/200 0 34

SERVICE SCHEDULE 10000’s 00

Function 35 Day

SERVICE SCHEDULE DAY 00/00/2000 35

SERVICE SCHEDULE 10000’s 0000

Function 36 Telephone

TELEPHONE # 000 000 0000 36

Table 24 - Maintenance Reminder Function Screens

000000 33

0000 34

00 35

Allows the user to set the year of the next service reminder.

Hours

Allows the user to set the left two digits of the amount of run hours before next service reminder.

If the date function was selected, this function programs the month. If you selected the run hour function, you will need to program 10,000 hours, if required.

Hours

Allows the user to set the middle two digits of the amount of run hours before next service reminder.

Sets the day of next service reminder.

Hours

Sets the two right digits of the amount of run hours for the next service reminder.

Allows the user to input a telephone number that will display when maintenance is required.

G. Resetting the Maintenance Schedule

When the system control ashes MAINTENANCE REQUIRED, it is advisable that you call for service. After the service is performed, reset the schedule for the next required service by using the following steps. Press ENTER on the display for 3 seconds. The Menu code will appear as 000. This does not change. Press ENTER again. SERVICE SCHEDULE RESET will be displayed. Using the > key scroll to the selection of year or hours. Press ENTER to reset the selected Service Schedule. To change a setting, press

ENTER. Press the ^ and v keys to make adjustments. Press ENTER when reset is complete.

Part 10 - Start-Up Procedures for the Installer

A. Boiler Control Status Menu

The boiler control also has the ability to review system status. To access the status screens, press >. Once the rst value is displayed, press ^ and v to scroll through additional information. At any point press RESET to exit the status screens.

LP-551 Rev. 3.9.16

Page 45

Screen Description

SUPPLY SEN 180

RETURN SEN 150oF

Press v once.

NA NA SUPPLY SEN 122

Press v once.

0-10 SIGNL ON *

Press v once.

CAS SET 190

SYSTEM 112oF

Press v once.

TANK SET 120

RET / TANK OFF

Press v once.

NA 11 FLUE 95

Press v once.

FLAME 0.0uA FAN SPEED 3497 RPM

Press v once.

0-10 V 0.0V *

Press v once.

This is the rst screen that appears after pressing >, and shows the actual temperatures measured

by the supply and return sensors. NOTE: If the boiler is congured to use a 0 – 10 volt input, the return sensor is disabled and the second line of the display will be blank.

The actual temperature measured by the supply sensor is displayed on

the bottom.

Shows if 0-10 volt is enabled.

This screen appears only when the boiler is set as a Master Boiler.

This screen displays the cascade set point (maximum 190 line. The system sensor reading is

F) on the top

on the second line. The control will cascade the boilers up to this set point depending on demand.

Displays the current tank temperature set point on the top line. The actual temperature measured by the tank or return sensor (HTP 7250P-325) is displayed on the

bottom line. If a mechanical aquastat is used in place of the recommended sensor, the second line will display ‘OFF’ in place of the temperature if the aquastat measures close to its set temperature, or ‘ON’ if the aquastat temperature is too low.

The second line displays the current

F F

boiler ue temperature.

This screen displays boiler ame current on the top line. The second line displays boiler fan speed.

The top line displays the voltage on the optional input. This voltage is only relevant if an external 0-10 volt signal is being used to control the boiler.

This display shows the status of the communication bus between multiple boilers. If in a single boiler conguration, the display will

BUS COMM NO CONN

show ‘NO CONN’. In a multiple boiler conguration, if this is the Master Boiler and other boilers are connected to the communication bus and powered, this screen will show the address of each boiler connected to the bus.

Press v once.

The top line indicates the amount of POWER ON 0H CH ON 0H

hours the boiler has been powered

over its life. The second line is not

applicable.

Press v once.

The top line indicates the hours the

burner has been on for hot water VWH ON 0H GOOD IGNIT 1X

demand over the boiler’s life. The

second line indicates how many

times the burner has successfully

ignited over the boiler’s life.

Press v once.

SYS CH ON 0H SYS VWH ON 0H

> once at any status

Press

The top line is not applicable. The

second line registers system pump

hours on the cascade master ONLY.

screen.

TEMPERATURE CONTROL ANALOG SIG 0.2 V

Displays 0-10V status when 0-10V is

connected.

Table 25 - Boiler Control Status Menu Screens

The next ten screens display the last ten boiler lockout faults. Press v to scroll through the faults from most recent to oldest.

Screen Description

This screen displays the most recent

boiler control lockout fault. The

FAULT HISTORY 1 07/27/2009 Mo 5:19A

Press v once.

FAULT HISTORY 2 08/28/2009 Fr 5:19A

Press v once.

FAULT HISTORY 3 08/28/2009 Fr 5:19A

Press v once.

top line will alternate between the

words ‘FAULT HISTORY’ and the

fault code encountered. The bottom

line displays the date and time the

fault occurred.

This screen displays the second

oldest boiler control lockout fault.

The top line will alternate between

the words ‘FAULT HISTORY’ and

the actual fault encountered. The

bottom line will display the date and

time that the fault occurred.

This screen displays the third oldest

boiler control lockout fault. The top

line will alternate between the words

‘FAULT HISTORY’ and the actual

fault encountered. The bottom line

will display the date and time that

the fault occurred.

LP-551 Rev. 3.9.16

Page 46

FAULT HISTORY 4 08/28/2009 Fr 5:19A

Press v once.

FAULT HISTORY 5 08/28/2009 Fr 5:19A

Press v once.

FAULT HISTORY 6 08/28/2009 Fr 5:19A

Press v once.

FAULT HISTORY 7 08/28/2009 Fr 5:19A

Press v once.

FAULT HISTORY 8 08/28/2009 Fr 5:19A

Press v once.

FAULT HISTORY 9 08/28/2009 Fr 5:19A

FAU LT HISTORY 10 08/28/2009 Fr 5:19A

Table 26 - Boiler Fault Screens

This screen displays the fourth oldest boiler control lockout fault. The top line will alternate between the words ‘FAULT HISTORY’ and the actual fault encountered. The bottom line will display the date and time that the fault occurred.

This screen displays the fth oldest boiler control lockout fault. The top line will alternate between the words ‘FAULT HISTORY’ and the actual fault encountered. The bottom line will display the date and time that the fault occurred.

This screen displays the sixth oldest boiler control lockout fault. The top line will alternate between the words ‘FAULT HISTORY’ and the actual fault encountered. The bottom line will display the date and time that the fault occurred.

This screen displays the seventh oldest boiler control lockout fault. The top line will alternate between the words ‘FAULT HISTORY’ and the actual fault encountered. The bottom line will display the date and time that the fault occurred.

This screen displays the eighth oldest boiler control lockout fault. The top line will alternate between the words ‘FAULT HISTORY’ and the actual fault encountered. The bottom line will display the date and time that the fault occurred.

This screen displays the ninth oldest boiler control lockout fault. The top line will alternate between the words ‘FAULT HISTORY’ and the actual fault encountered. The bottom line will display the date and time that the fault occurred.

This screen displays the tenth oldest boiler control lockout fault. The top line will alternate between the words ‘FAULT HISTORY’ and the actual fault encountered. The bottom line will display the date and time that the fault occurred.

Screen Description

BLOCKING HISTORY 1 08/28/2009 Fr 5:19A

Press v once.

BLOCKING HISTORY 2 08/28/2009 Fr 5:19A

Press v once.

BLOCKING HISTORY 3 08/28/2009 Fr 5:19A

Press v once.

BLOCKING HISTORY 4 08/28/2009 Fr 5:19A

Press v once.

BLOCKING HISTORY 5 08/28/2009 Fr 5:19A

Press v once.

BLOCKING HISTORY 6 08/28/2009 Fr 5:19A

Press v once.

BLOCKING HISTORY 7 08/28/2009 Fr 5:19A

Press v once.

BLOCKING HISTORY 8 08/28/2009 Fr 5:19A

Press v once.

BLOCKING HISTORY 9 08/28/2009 Fr 5:19A

This screen displays the most recent boiler control blocking error. The top line will alternate between the words ‘BLOCKING HISTORY’ and the blocking code encountered.

This screen displays the second oldest boiler control blocking error. The top line will alternate between the words ‘BLOCKING HISTORY’ and the actual blocking code encountered.

This screen displays the third oldest boiler control blocking error. The top line will alternate between the words ‘BLOCKING HISTORY’ and the actual blocking code encountered.

This screen displays the fourth oldest boiler control blocking error. The top line will alternate between the words ‘BLOCKING HISTORY’ and the actual blocking code encountered.

This screen displays the fth oldest boiler control blocking error. The top line will alternate between the words ‘BLOCKING HISTORY’ and the actual blocking code encountered.

This screen displays the sixth oldest boiler control blocking error. The top line will alternate between the words ‘BLOCKING HISTORY’ and the actual blocking code encountered.

This screen displays the seventh oldest boiler control blocking error. The top line will alternate between the words ‘BLOCKING HISTORY’ and the actual blocking code encountered.

This screen displays the eighth oldest boiler control blocking error. The top line will alternate between the words ‘BLOCKING HISTORY’ and the actual blocking code encountered.

This screen displays the ninth oldest boiler control blocking error. The top line will alternate between the words ‘BLOCKING HISTORY’ and the actual blocking code encountered.

LP-551 Rev. 3.9.16

Page 47

Press v once.

This screen displays the tenth oldest

BLOCKING HISTORY 10 08/28/2009 Fr 5:19A

boiler control blocking error. The top line will alternate between the words ‘BLOCKING HISTORY’ and the blocking code encountered.

Table 27 - Boiler Fault Screens

B. Cascade Menu

This menu is accessed by pressing < at the default menu or > at the status menu.

Screen Description

This screen displays when the boiler is congured as a Cascade Master and the system is ready to accept a demand for heat. The second line

CASCADE MASTER READY SYS PUMP OFF

CASCADE NO FOLLOWER SYS PUMP OFF

CASCADE NO SENSOR SYS PUMP OFF

indicates the cascade system pump output status. This screen alternates with the default screen every 5 seconds or can be accessed by

pressing the

< key from the default

screen.

This screen displays when the boiler is congured as a Master Boiler and there are no connected follower boilers, or the follower boilers are not powered. The second line indicates cascade system pump output status. This screen alternates with the default screen every 5 seconds or

can be accessed by pressing the key from the default screen.

This screen displays when the boiler is congured as a Master Boiler and there is no system temperature sensor connected or the system sensor is defective. The cascade system will still function in this situation with reduced eciency. All boilers will run simultaneously rather than in a staged fashion. The second line indicates cascade system pump output status. This screen will alternate with the default screen every 5 seconds or can be

accessed by pressing the

< key from

the default screen.

CASCADE VWH 0123 567 SYS PUMP ON 12:47P

Press v once.

CASCADE PW R 100% PRESE NT 01 2345 67

Press v once.

CASCADE SYST 1 18

CAS CADE SE T 19 0oF

Press v once.

BOILER 0 100% BOILER 1 56%

Press v once.

BOILER 2 0% BOILER 3 0%

Press v once.

BOILER 4 0% BOILER 5 0%

Press v once.

BOILER 6 0% BOILER 7 0%

This screen displays information about cascade status. The VWH in the center of the top line shows that cascade demand is coming from the tank sensor or thermostat. You may also see 0-10 if the demand is from a 0-10 volt input. The following numbers show which boiler addresses are currently communicating to the master. If a boiler address is not used or communicating, the number will not display. In the example to the left, boiler address #4 is not communicating. When a boiler in the system is ring, its address number will alternate with a ‘.’ to signify it is ring. The bottom line shows the status of the system pump output contacts.

This screen displays overall cascade power output. The range of this value is the number of boilers communicating with the Master x

100. For example, if 8 boilers are connected and ring, the maximum cascade power is 800%. The second line shows which boiler addresses are communicating with the Master.

This screen displays current system

temperature sensor reading on the top line and the cascade system temperature setting on the bottom.

This screen displays the current cascade power demand output on a per connected boiler basis for boilers addressed as 0 and 1. In the example, boiler 0 is being commanded to re at 100% and boiler 1 at 56%. If this were a 2 boiler system, the ‘CASCADE PWR’ screen above would read 156%.

This screen displays the current cascade power demand output on a per connected boiler basis for boilers addressed as 2 and 3.

This screen displays the current cascade power demand output on a per connected boiler basis for boilers addressed as 4 and 5.

This screen displays the current cascade power demand output on a per connected boiler basis for boilers addressed as 6 and 7.

LP-551 Rev. 3.9.16

Page 48

Press v once.

BOILER 8 N/A BOILER 9 N/A

Press v once.

BOILER A10 N/A BOILER B11 N/A

Press v once.

BOILER C12 N/A BOILER D13 N/A

Press v once.

BOILER E14 N/A BOILER F15 N/A

Table 28 - Cascade Menu

This screen is not applicable.

C. Boiler Test Mode

This function is intended to simplify gas adjustment. The following tables include recommended combustion settings by fuel type and boiler fan speeds. Automatic modulation does not take place while the controller is in Test Mode. However, the boilers will modulate down if the program set point is reached while running in Test Mode. It is recommended to enter Test Mode with the largest load possible to create such a heat demand that Test Mode will not be interrupted. To enter Test Mode press ^ and ENTER simultaneously. NOTE: The boiler will automatically exit Test Mode after 20 minutes of operation. To leave Test Mode press ^ and v simultaneously.

SERVICE RUN 3400 RPM PUMP ON 4:49P

Combustion Settings on All Models

Fan Speed

Carbon

Monoxide

(CO) PPM

Carbon Dioxide (CO2) %

Table 29 - Combustion Settings - All Models

Model Ignition Min Max

80kBTU NG / LP 3000 1600 5500

110kBTU NG

110kBTU LP 1550 5200

150kBTU NG 1600

150kBTU LP 1525

220kBTU NG

220kBTU LP 1300 4800

299 / 301kBTU NG 1420 5450

299 / 301kBTU LP 1370 5800

399kBTU NG 1550 7450

399kBTU LP 1525 7175

Table 30 - Fan Speeds

Natural Gas (NG) Propane (LP)

Low Ignition High Low Ignition High

5-50 60-100

8-10 8 1/2-10 1/2 9-10 1/2 9 1/2-11

<150 5-50 60-100 <150

Fan Speeds

1500 5150

3800

5550

1320 5350

3000

Part 11 - Troubleshooting

A. Boiler Error and Fault Codes

If any of the sensors detect an abnormal condition, or an internal component fails during the operation of the boiler, the display may show an error message and error code. This message and code may be the result of a temporary condition, in which case the display will revert to its normal readout when the condition is corrected, or it may be a condition that the controller has evaluated as not safe to restart the boiler. In this case, the boiler control will be locked out, the red FAULT light will be lit, and the message “LOCKOUT” will be displayed on the readout in the lower line. The boiler will not start until a qualied technician has repaired the boiler and pressed the RESET button for more than 1 second. If there is an error message displayed on the readout, and the message “LOCKOUT” is not displayed and the FAULT light is not lit, then the message is the result of a temporary condition and will disappear when the problem corrects itself. IMPORTANT NOTE: If you see error messages on your display readout, call a technician immediately, since the message may indicate a more serious problem will occur soon.

B. Boiler Error

The controller will display an error code and message when an error condition occurs. These error codes, descriptions, and recommended corrective actions are described in Section D.

C. Boiler Fault

1. The controller will illuminate the red “FAULT” indication light and display a fault code and message when a fault condition occurs. The alarm output will also activate. Most fault conditions cause the CH pump to run in an attempt to cool the boiler.

2. Note the displayed fault code and refer to Section D for an explanation of the message along with several suggestions for corrective actions.

3. Press RESET to clear the fault and resume operation. Be sure to observe the operation of the unit for a period of time to assure correct operation and no reoccurrence of fault message.

When servicing or replacing components that are in direct contact with boiler water, be certain that:

• There is no pressure in the boiler. (Pull the release on the relief valve. Do not depend on the pressure gauge reading.

• The boiler water is not hot.

• The electrical power is disconnected.

• The gas is shut o.

Failure to make these checks could result in substantial property damage, serious personal injury, or death.

LP-551 Rev. 3.9.16

Page 49

DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN SUBMERGED IN WATER. Immediately call a qualied service

technician. The appliance MUST BE replaced if it has been submerged. Attempting to operate an appliance that has been submerged could create numerous harmful conditions, such as a potential gas leakage causing a re and/or explosion, or the release of mold, bacteria, or other harmful particulates into the air. Operating a previously submerged appliance could result in property damage, severe personal injury, or death. NOTE: Appliance damage due to ood or submersion is considered an Act of God, and IS NOT covered under product warranty. If overheating occurs or the gas supply fails to shut o, do not turn o electrical power to the circulating pump. This may aggravate the problem and increase the likelihood of boiler damage. Instead, shut o the gas supply to the boiler at the gas service valve. Failure to do so may result in property damage, personal injury, or death.

D. User Interface Display

Cascade Control Fault Codes

Screen Description Possible Remedy

E03 indicates a problem with the system sensor circuit. The circuit could be open or shorted. Possible reasons for this error are: There is no system sensor connected to the

Master Boiler. SYS SUPPLY SENSOR E03 PUMP OFF 12:56P

SUPPLY SENSOR F02 PUMP ON TIME

RETURN SENSOR F03 PUMP ON TIME

The system sensor is faulty.

There is a short circuit in the system sensor

wiring; possibly from a staple placed through

the wire, or damage to the wire causing both

conductors to touch.

The system sensor wiring is open due to

defect or damage.

The dual supply sensor contains two

sensing elements within a single body. F02

indicates that one or both halves of the

supply temperature sensor has failed OR the

dierence between the dual sensor readings

is greater than 18

issue and the boiler will not restart until the

sensor is replaced by a technician and he

pushes the RESET button on the display.

This situation is indicated by the red light on

the display and the ashing word LOCKOUT.

During this lockout fault, the pump will be on

as indicated on the second line of the display.

F03 indicates the return temperature sensor

of the boiler has failed. The boiler will not

restart until a technician replaces the sensor

and pushes RESET on the display. This is

a serious safety issue as indicated by the

illuminated red light and the word LOCKOUT

ashing on the display. During this lockout

fault, the pump will be on.

F. This is a serious safety

NOTE: If system return temperatures are maintained below the dew point, condensation will form on the inside of the boiler cabinet and cause some internal sheet metal components to rust.

Disconnect the system sensor from the wiring and measure it’s resistance. Compare the measured resistance to the table in this manual to see if it corresponds to the temperature of the sensor. If the resistance does not agree with the sensor, replace the sensor. If the sensor is OK, disconnect the sensor wiring from both the boiler and the sensor and check continuity using an ohmmeter. Repair or replace as necessary. If this error is present, the boilers in the cascaded group will run and ignite simultaneously when there is a heat demand. Each boiler will modulate to maintain set point temperature on its own supply sensor. This code automatically resets when repair is complete. This code will not display if system setting function ERROR SYSTEM SENS is set to OFF.

1. Check the electrical connections to each half of the sensor on the outlet manifold. Verify 5 VDC by checking in Molex connector. If there is not 5 VDC, check the harness. If harness and sensors are OK, replace control. NOTE: The boiler will reset automatically. Verify sensor resistance values of each half of the dual sensor by referencing chart in this manual.

2. Replace thermistor if necessary.

1. Check circulator pump operation.

2. Ensure adequate ow through the boiler by accessing the status menu and determining there is less than a 50 rise from the return thermistor to the supply thermistor.

3. Troubleshoot thermistor by following the steps in F02.

LP-551 Rev. 3.9.16

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FLUE SENSOR F04 PUMP ON TIME

SUPPLY HIGH F05 PUMP ON TIME

RETURN TEMP HIGH F06 PUMP ON TIME

NO FLAME ON IGN F09 PUMP ON TIME

The dual ue sensor contains two sensing elements within a single body. F02 indicates that one or both halves of the ue temperature sensor has failed OR the dierence between the dual sensor readings is greater than 18oF. This is a serious safety issue and the boiler will not restart until the sensor is replaced by a technician and he pushes the RESET button on the display. This situation is indicated by the red light on the display and the ashing word LOCKOUT. During this lockout fault, the pump will be on as indicated on the second line of the display.

F05 indicates the boiler supply temperature is excessive. When accompanied by the red FAULT light and LOCKOUT ashing on the display, this code indicates the supply sensor temperature has exceeded 230

F and a serious safety issue exists. The boiler will not restart until a technician determines and repairs the cause of excessive temperature and pushes RESET on the display. If the FAULT light is not illuminated and this message is displayed, the supply temperature of the boiler is at or above 210oF. The message will clear automatically when the temperature drops below 194oF. During the time that this fault is displayed, the pump will be on.

This display indicates that the boiler return temperature is excessive. When accompanied by the red FAULT light and LOCKOUT ashing on the display, this code indicates that the return sensor temperature has exceeded 230

F and a serious safety issue exists. The boiler will not restart until a technician determines and repairs the cause of excessive temperature and pushes RESET on the display. If the red FAULT light is not illuminated and this message is displayed, then the return temperature of the boiler is at or above 210oF. The message will clear automatically when the temperature drops below 194

F. During the time that this message or lockout fault is displayed, the pump will be on.

The boiler tried to ignite four times during one heat call and failed. This is a serious safety issue as indicated by the illuminated red light and the word LOCKOUT ashing on the display. The boiler will not restart until a technician determines and repairs the cause of ignition failure and pushes RESET on the display. During this lockout fault, the pump will remain on.

1. Inspect the dual ue sensor for physical damage, blockage, or corrosion and replace it if necessary.

2. Check the electrical connection to the dual ue sensor and repair as necessary. Verify 5 VDC by checking in Molex connector. If there is not 5 VDC, check the harness. If harness and sensors are OK, replace control. NOTE: The boiler will reset automatically. Verify sensor resistance values of each half of the dual sensor by referencing chart in this manual.

3. Replace sensor if necessary.

1. Check circulator pump operation.

2. Ensure adequate ow through the boiler by accessing the status menu and determining there is less than a 50°F rise from the return thermistor to the supply thermistor.

3. Check the direction of ow o the boiler circulator. (See Piping Details in this manual.)

4. Troubleshoot the dual supply thermistor by following steps in F02.

1. Check circulator pump operation.

2. Ensure adequate ow through the boiler by accessing the status menu and determining there is less than a 50°F rise from the return thermistor to the supply thermistor.

3. Check the direction of ow on boiler circulator. (See Piping Details in this manual.)

4. Troubleshoot thermistor by following steps in F02.

1. Watch the igniter through the observation window.

2. If there is no spark, check the spark electrode for the proper 1/4” gap between the burner.

3. Remove any corrosion from the spark electrode.

4. If there is a spark but no ame, check the gas supply to the boiler.

5. If there is a ame, check the ame current.

6. Check any ue blockage or condensate blocks.

7. Replace the ignitor.

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FLAME LOSS F10 PUMP ON TIME

FALSE FLAME SIG F11 PUMP ON TIME

FAN SPEED ERROR F13 PUMP ON TIME

FLUE LIMIT F17 PUMP ON TIME

CONDENSATE FULL F20 PUMP OFF TIME

The ame was lost 3 times while the boiler was ring during 1 demand call. This is a serious safety issue as indicated by the illuminated red light and the word LOCKOUT ashing on the display. The boiler will not restart until a technician determines and repairs the cause of ame loss and pushes RESET on the display. During this lockout fault, the pump will be on.

There is ame when the control is not telling the boiler to run. This is a serious safety issue as indicated by the illuminated red light and the word LOCKOUT ashing on the display. The boiler will not restart until a technician determines and repairs the cause and pushes RESET on the display. During this lockout fault, the pump will be on.

The fan is not running at the speed determined by the control. Fan speed has been more than 30% faster or slower than the commanded speed for more than 10 seconds. This is a serious safety issue as indicated by the illuminated red light and the word LOCKOUT ashing on the display. This boiler will not restart until a technician determines and repairs the cause and pushes RESET on the display. During this lockout fault, the pump will be on.

F05 indicates the boiler ue temperature is excessive. When accompanied by the red FAULT light and LOCKOUT ashing on the display, this code indicates the ue sensor temperature has exceeded 210

F and a serious safety issue exists. The boiler will not restart until a technician determines and repairs the cause of excessive temperature and pushes RESET on the display.

The condensate trap is full. This is a serious safety issue as indicated by the illuminated red light and the word LOCKOUT ashing on the display. The boiler will not restart until a technician determines and repairs the cause and pushes RESET on the display. During this lockout fault, the pump will be o.

1. Monitor gas pressure to the unit while in operation.

2. Assure the ame is stable when lit.

3. Check if the display readout changes from “GAS VALVE ON” to “RUN” within a few seconds of boiler ignition.

4. Check the FLAME signal on the display. It should be above 2.5uA when the boiler is ring.

5. If the signal reads less than 2.5uA, clean the spark probe.

6. If the problem persists and the ‘FLAME” signal is still less than 2.5uA, replace the spark igniter probe.

7. The ame signal should be steady after the boiler has been ring for 1 minute and is normally at 5.0 to 9.0. If the ame signal is not steady, disassemble the burner door and check the burner and its sealing gaskets.

1. Look into window. If there is ame, turn the gas o to the unit at the service valve and replace the gas valve.

2. If the ame signal on the status menu is greater than

2.5uA when the burner is not lit, replace the spark ignitor.

3. If the ame signal is not present after turning o the gas supply, check the gas valve electrical connection.

4. Check for condensate backup. Repair condensate system as necessary. If condensate has partially lled the combustion chamber, the refractory wall may be damaged and should be replaced.

5. Turn the gas on at the service valve after corrective action is taken.

6. If the refractory wall falls against the spark ignitor, it may conduct the signal to ground, giving a false reading.

1. Check the combustion fan wiring.

2. Measure DC voltage from the red fan wire to ground while it is connected to the fan. It should be between 24 and 40 volts. If it is lower than 24 volts, check for excessive external loads connected to the boiler sensor terminals

3. Disconnect the 5 pin plug from the fan and check the voltage on the red wire again. If it is now between 24-40 volts, replace the fan. If it is still below 24 volts replace the boiler control board.

1. Check the ue for obstructions and any sign of damage, especially signs of excessive heat. Repair as necessary.

2. Run the boiler and check the ue temperature with an external thermometer. If the ue temperature on the thermometer does not agree with the ue temperature displayed in the status menu, inspect the wiring to the ue temperature sensor in the boiler and repair as necessary. If the wiring is intact replace the ue sensor.

3. If the ue temperature is excessive on the status menu and the test thermometer reads the same, check and adjust combustion controls on the boiler.

1. Check condensate lines for obstructions.

2. Check oat switch in condensate reservoir.

3. Check wiring from condensate reservoir to 928 control and repair as necessary.

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LOW WATER BOILER F21 PUMP OFF TIME

EXTERNAL LWCO F22 PUMP ON TIME

GAS PRESSURE F26 PUMP ON TIME

PROGRAM ERROR F31 PUMP OFF

HARD FAULT COND F41

HARD FAULT LWCO F42

Water level in the boiler is low.

This error is generated when the External Low Water Cut O is installed and the water level in the boiler is low. When this code is displayed, the boiler will not respond to a demand for heat. The bottom line of the display indicates the status of the pump. The pump will remain on when this error is displayed.

The following switches are optional equipment that may be installed on boiler. These devices have indicator lights that illuminate if tripped. High gas pressure switch – Trips if there is excessive gas pressure on the outlet side of the gas valve and must be manually reset. Low gas pressure switch – Trips if there is low gas pressure on the inlet side of the gas valve and must be manually reset.

There was an error while programming the control and the memory is corrupt. The boiler control will not function in this state and the pump will be o as indicated on the bottom line. This error only occurs if a technician is programming the control and the programming function fails. The only way to recover from this error is to reprogram the control. If this error occurs at any time other than when a technician is servicing the boiler, the control has failed and must be replaced by a qualied technician.

This error indicates there is an internal fault in the circuit within the control connected to the condensate switch.

This error indicates there is an internal fault in the LWCO circuit.

1. Check boiler feed water system to be sure it is supplying make-up water to the boiler system.

2. Ensure all air is bled from the system.

3. Check for leaks in the boiler and system piping and repair as necessary.

4. Inspect low water cut o probe and wiring for damage and repair and replace as necessary.

5. Ensure LWCO jumper is intact and properly installed if boiler does not have an installed external LWCO.

IF EXT LWCO is installed:

1. Check boiler feed water system. Ensure it is supplying make-up water to the boiler system.

2. Be sure all air is bled from the system.

3. Check for leaks in the boiler and system piping and repair as necessary.

4. Inspect low water cut o wiring for damage and repair as necessary.

5. Ensure EXT LWCO has power applied to the power input terminals.

6. Press Reset button on LWCO. If error reoccurs, replace EXT LWCO. IF EXT LWCO is NOT installed: Inspect the jumper from terminals 20 and 21 on the Field Connection Board for damage or loose connections.

1. If an indicator light is illuminated, investigate the source of the error for that particular switch.

2. With boiler in service mode, measure the gas pressure in the supply line with a gas pressure meter. Monitor the gas pressure during both low and high re conditions for correct pressure range.

3. If there are no optional switches or none of the indicator lights is illuminated on the optional switches, use an ohmmeter to test each of the switches one at a time. Turn the power o to the boiler and disconnect the switch to be tested from the boiler to determine which has tripped. When you nd the tripped switch investigate the cause of the fault based on the purpose of the switch.

The control must be reprogrammed. If programming does not solve the problem, the control must be replaced.

1. Inspect the ground wires for damage or loose connections.

2. Inspect the condensate wiring for damage and repair as necessary.

3. Ensure no high voltage wires are routed in parallel with the condensate low voltage wiring.

4. Replace control.

1. Inspect the ground wires for damage or loose connections.

2. Inspect the LWCO wiring for damage and repair as necessary.

3. Ensure no high voltage wires are routed in parallel with the LWCO low voltage wiring.

4. Replace control.

LP-551 Rev. 3.9.16

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The control has been programmed by a

CONTROL PROGRAMED PP

technician or the factory. After programming,

Press RESET for at least 1 second to use the control.

the control is left in a locked out mode.

1. Check outdoor sensor connections and wiring. Ensure the sensor and wiring are intact and that the sensor is

OUTDOOR SENSOR FOU PUMP ON 1:45P

There is an issue with the outdoor sensor. It is shorted, damaged, or disconnected from the boiler.

connected to the boiler.

2. Check the outdoor sensor resistance with an ohmmeter. See table in this manual for correct outdoor sensor resistance.

3. Replace the outdoor sensor.

The following blocking codes will block operation until the control determines the situation safe for boiler operation.

1. Ensure boiler contains water and all valves are open.

2. Check the boiler circulator and ensure it is in good operating condition (operating, wiring intact, etc.).

3. Inspect the wiring to the ow switch for damage and LOW WATER FLOW FL PUMP OFF 4:32P

This indicates the ow switch is not activated.

repair as necessary.

4. Disconnect one wire from the ow switch and test for

continuity across the switch while ow is conrmed to be present.

5. Remove ow switch and inspect switch paddle for

proper operation.

Check the ue for obstructions or any sign of damage, especially signs of excessive heat. Repair as necessary. Run the boiler and check the ue temperature with an external thermometer. If the ue temperature on the thermometer does not agree with the ue temperature displayed in the status menu, inspect the wiring to the ue temperature sensor in the boiler and repair as necessary. If the wiring is intact, replace the ue sensor. If the ue temperature is excessive on the status menu and the test thermometer reads the same, check and adjust

FLUE TEMP HIGH E07 PUMP ON TIME

This display indicates that the ue sensor temperature is above 210

F. When this code is displayed, the boiler will not respond to a demand for heat. When the ue temperature decreases below 194oF, the display will return to normal and allow the boiler to respond to a heat demand. The bottom line indicates the status of the pump. The pump will remain on when this error is displayed.

combustion controls on the boiler.

TT indicates there is a demand for heat on the boiler, the pump is powered on, and the

TEMPER BLOCKING TT PUMP ON

supply sensor temperature is too high for the boiler to ignite. This occurs because the water temperature measured by the supply

This message will stay present until the water temperature measured by the supply sensor is less than the tank

temperature – ignition di setting. sensor is higher than the tank temperature – ignition di setting.

1. Assure the ue is not blocked.

2. Check the switch wiring by applying a jumper in place

of the switch. If the code clears with the jumper in place,

REPLACE the ue switch and connect the wires to the

new switch BEFORE running boiler.

HIGH FLUE PRESS FLU PUMP ON

FLU indicates excessive ue pressure. This code resets automatically after the high pressure condition is resolved. The second line indicates pump status.

WARNING: Do not use jumper to remedy an FLU error. Faulty switch MUST be replaced. Failure to follow this instruction could result in serious personal injury or death.

1. Check the ue for obstructions and any sign of damage,

especially signs of excessive heat. Repair as necessary.

2. Run the boiler and check the ue temperature with

an external thermometer. If the ue temperature on the

thermometer does not agree with the ue temperature

displayed in the status menu, inspect the wiring to the ue

temperature sensor in the boiler and repair as necessary.

If the wiring is intact replace the ue sensor.

3. If the ue temperature is excessive on the status menu

and the test thermometer reads the same, check and

FLUE TEMP HIGH E07 PUMP OFF TIME

E07 indicates the ue sensor temperature is excessive and above 205

F. When E07 is displayed the boiler will not respond to a demand for heat and begin to modulate down on vent temp rather than supply temp. When the ue temperature decreases below 185oF, the display will return to normal and allow the boiler to respond to a heat demand.

adjust combustion controls on the boiler.

LINE VOLTAGE E19 PUMP OFF

E19 indicates the line voltage frequency is out of range. This could happen if the boiler is being powered from a small gasoline powered generator that is overloaded or not functioning correctly.

Inspect power wiring to the boiler and repair as necessary. If connected to line voltage, notify the power company. If connected to an alternate power source such as a generator or inverter, make sure the line voltage frequency supplied by the device is 47 - 62.5 Hz.

Table 31 - Boiler Error and Fault Codes

LP-551 Rev. 3.9.16

Page 54

Supply

Temperature

Sensor

(7700P-073)

Temperature (

Table 32 - Sensor Temperature Resistance

Indirect

Sensor

(7250P-325)

F) Resistance (ohms)

32 32624

41 25381

50 19897

59 15711

68 12493

77 10000

86 8056

95 6530

104 5324

113 4365

122 3599

131 2982

140 2483

149 2079

158 1748

167 1476

176 1252

185 1066

194 912

203 782

212 674

Return Sensor

(7250P-667)

Dual Flue

Temperature

Sensor

(7450P-176)

Part 12 - Maintenance

A. Procedures

Periodic maintenance should be performed once a year by a qualied service technician to assure that all the equipment is operating safely and eciently. The owner should make necessary arrangements with a qualied heating contractor for periodic maintenance of the boiler. The installer must also inform the owner that a lack of proper care and maintenance of the boiler may result in a hazardous condition.

BEFORE EACH HEATING SEASON a trained and qualied service technician should perform the inspections as per the boiler inspection and maintenance schedule in this manual. Failure to do so could result in death or serious injury.

The combustion chamber insulation in this product contains ceramic ber material. Ceramic bers can be converted to cristobalite in very high temperature applications. The International Agency for Research on Cancer (IARC) has concluded, “Crystalline silica inhaled in the form of quartz or cristobalite from occupational sources is carcinogenic to humans (Group 1).”

• Avoid breathing dust and contact with skin and eyes.

• Use a NIOSH certied dust respirator (N95). This type

of respirator is based on the OSHA requirements for cristobalite at the time this document was written. Other types of respirators may be needed depending on job site conditions. Current NIOSH recommendations can be found on the NIOSH website: http://www.cdc.gov/ niosh/homepage.html. NIOSH approved respirators, manufacturers, and phone numbers are also listed on this website.

• Wear long-sleeved, loose tting clothing, gloves, and eye protection.

• Apply enough water to the combustion chamber lining to prevent dust.

• Wash potentially contaminated clothes separately from other clothing. Rinse clothes washer thoroughly.

NIOSH stated First Aid.

• Eye: Irrigate immediately.

• Breathing: Fresh air.

B. Combustion Chamber Coil Cleaning Instructions

*Before beginning this procedure, have on hand the following items:

• a nylon, stainless steel, or brass brush (not steel)

• gloves and eye protection

1. Shut down the boiler by using the following steps: a. Close the gas valve. Shut down the unit, and wait for it to be cool to the touch. b. Disconnect the condensate piping from the outside connection, (not from the boiler side), so ow from condensate reservoir can be observed. c. Disconnect electrical connections from the gas valve, spark electrode, ame rectication probe, and combustion blower. d. Remove the four (4) screws on the aluminum ¾” NPT connector on the right side of the gas valve. e. Disconnect the wiring connected to the combustion blower motor. f. Remove the six (6) 10MM nuts from the burner plate assembly. g. Pull the entire burner plate assembly with blower still attached towards you, while removing or pushing aside any wiring to allow removal of the assembly.

2. Spray the coils liberally with a spray bottle lled with clear

tap water. Conne the spray to the area being cleaned. Avoid getting the ceramic target wall wet. If the condensate system is blocked, use a vacuum to clear it.

3. Scrub coils of any buildup with a nylon, stainless steel, or

brass brush. Do not use a steel brush. Vacuum the debris from the coils.

4. Spray the coils again with clear tap water. Conne the spray

LP-551 Rev. 3.9.16

Page 55

to the area being cleaned. Flush the combustion chamber with fresh water until it runs clear from the condensate reservoir. At this point, the boiler should be ready to be reassembled.

a. Inspect gaskets. b. Reinstall the burner assembly c. Replace and tighten the six (6) 10MM nuts to the burner plate using staggered tightening sequence. (See detail.) d. Reconnect all wiring connections e. Inspect the gas valve. Ensure the O-ring is in place. f. Replace the four (4) screws on the aluminum connector on the gas valve. Turn the gas back on. (IMPORTANT: CHECK FOR GAS LEAKS!) g. Turn boiler power back on and create a heat demand. When boiler is lit observe condensate ow from the boiler. Be sure the boiler is operating properly. h. Reconnect the condensate piping to the outside condensate connection.

Do not use solvents to clean any of the burner components. The components could be damaged, resulting in unreliable or unsafe boiler operation, substantial property damage, severe personal injury, or death.

system.

3. Thoroughly ush the heat exchanger before commissioning the unit back in service.

D. Maintaining the Condensate System

The condensate trap assembly MUST BE PROPERLY INSTALLED according to these instructions when operating the boiler. Operating the boiler without the condensate trap assembly will cause ue gases to leak and result in serious personal injury or death.

When servicing is complete, make sure the condensate collector cap is replaced securely. Failure to do so will cause venting issues that will result in serious injury or death.

1. Ensure the boiler is powered o and has had time to cool.

2. Remove the hose clamp attaching the condensate trap to the condensate hose from the heat exchanger. Remove the clear plastic hose from the hose barb. Remove the condensate hose clamp to detach the condensate trap from the drain tube. Remove the condensate trap from the boiler.

3. Remove the bottom cap from the condensate trap.

4. Flush trap with fresh water to remove debris from the trap. NOTE: Ensure the oat moves freely within the trap. If the oat does not move, DO NOT reinstall the trap.

5. When the condensate trap is suciently clean, reinstall the bottom cap on the trap. NOTE: Ensure all parts shown in Figure 29, Condensate Detail, are installed with the condensate trap. If any parts are missing, DO NOT reinstall the trap. Replace the entire assembly.

Figure 28 - Heat Exchanger Detail

C. Cleaning Water Side of Heat Exchanger

1. Make sure power is turned o to the boiler. Run water through the hot water system to ensure it is below room temperature.

2. Close isolation valves on the return and supply connections to the boilers as shown in the piping diagrams in this manual. Slowly open the ball valves and release pressure into a bucket. Once pressure is released, connect a hose to the water line to ush the boiler. Scale removing solution may be used, but must be approved for use with stainless steel and FDA approved for use in a potable water

Do not install the condensate assembly if a component is lost or missing. Replace the entire assembly. Failure to follow this warning could result in property damage, serious personal injury, or death.

6. Fill the condensate trap with fresh water prior to reassembly on the boiler.

7. Install the condensate trap on the condensate hose from the heat exchanger. Use the hose clamp to secure the trap. Attach the clear plastic hose onto the hose barb. Reinstall the condensate hose clamp to detach the condensate trap from the drain tube.

Do not operate the boiler without the clear hose attached from the hose barb to the pressure switch. Failure to follow this warning could result in property damage, serious personal injury, or death.

8. If a condensate neutralizer kit is installed with the boiler, check the assembly when cleaning the condensate trap, and replenish the limestone chips if necessary. When replacing limestone chips, take care to ensure chips are no smaller than ½” to avoid blockage in condensate piping (for piping details, refer to condensate neutralizer installation instruction.)

9. Check condensate piping for sagging and/or leakage. Repair any sags or leaks before restoring power to the boiler.

LP-551 Rev. 3.9.16

Page 56

It is very important that the condensate piping be no smaller than ¾”. To prevent sagging and maintain pitch, condensate piping should be supported with pipe supports, and pitched ¼” per foot to allow for proper drainage. Failure to maintain proper pipe size and pitch could result in condensate leakage and potential water damage to property. The condensate line must remain unobstructed, allowing free ow of condensate. If condensate freezes in the line, or if line is obstructed in any other manner, condensate can exit from the tee, resulting in potential water damage to property.

10. If the boiler has a condensate pump, ensure the pump operates properly before considering maintenance complete.

Figure 29 - Condensate Detail

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Figure 30 - Combustion System Replacement Parts - 220kBTU Model

LP-551 Rev. 3.9.16

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Figure 31 - Combustion System Replacement Parts - 299 - 399kBTU Models

LP-551 Rev. 3.9.16

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Figure 32 - Replacement Parts - All Models

LP-551 Rev. 3.9.16

Page 60

LP-550-V

02/18/16

ITEM# EL-80 EL-110 EL-150 EL-220 EL-299/301 EL-399 DESCRIPTION

1 7450P-282 7450P-157 CLAMP ALL - EXHAUST VENT ADAPTER

2 7450P-201 7450P-202 EXHAUST ADAPTER

3 7450P-176 DUAL FLUE SENSOR

4 7450P-030 7450P-031 AIR INLET ADAPTER

5 7450P-032 7450P-033 AIR INLET CONNECTOR NUT

6 7450P-028 DISPLAY BOARD

7 7450P-021 MEMBRANE TOUCHPAD

8 7450P-322 928 CONTROL BOARD

9 7500P-115 6-32 X 1/4 PAD HEAD SCREW - ELECTRONIC BOARDS

10 7250P-378 FUSE - CONTROL BOARD - 6.3 AMPS

11 7250P-150 PRESSURE SWITCH

12 7450P-142 6-32 FLANGED NUT - PRESSURE SWITCH

13 7350P-370 FIELD CONNECTION BOARD

14 6300P-037 FUSE - FIELD CONNECTION BOARD - 2.0 AMPS

15 7450P-902 7450P-903 FLUE KIT (includes: items #1, 2, 3)

16 7000P-805 PLASTIC TUBING - PRESSURE SWITCHES (NOT SHOWN)

17 7450P-352 7450P-354 7450P-356 7450P-358 120V WIRING HARNESS (NOT SHOWN)

18 7450P-353 7450P-355 7450P-357 7450P-359 LOW VOLTAGE WIRING HARNESS (NOT SHOWN)

19 7250P-154 HOSE BARB

20 7250P-152 O-RING - HOSE BARB

Figure 33 - Cabinet Replacement Parts - All Models

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Part 13 - Installation Checklist

Light O Activities Date Completed:

Check all piping and gas connections. Verify all are tight.

1. Fill the Heating System

2. Check Gas Pipe

3. Check Combustion

4. Check Electrical Connections

5. Verify System Operation

6. Record Ionization Current

7. Storage Tank

8. Mixing Valve

9. Convert the Boiler

Notes:

Pressurize system. PSI

Add water to prime condensate cup.

Verify near boiler piping is properly supported.

Leak test using locally approved methods (consult jurisdictional code book).

Check incoming gas pressure (3.5 to 14” WC).

Check the “drop” on light o (less than 1” WC).

Check and adjust (if necessary) carbon dioxide content.

Check and adjust (if necessary) carbon monoxide content.

Ensure all electrical connections of line voltage (pumps, etc.) and low voltage circuits (system sensor, outdoor sensor, etc.) are properly wired.

Turn up thermostat to verify wiring connections.

Check uA reading at d7 on the status menu (see Start-Up section, this manual).

Verify safety and operation of the storage tank. Record settings.

Ensure thermostatic mixing valve is properly supported and installed.

If necessary, convert the boiler to the proper fuel type.

Locate the stickers in the appropriate locations on the boiler.

Verify combustion settings after gas conversion - Carbon Dioxide.

Verify combustion settings after gas conversion - Carbon Monoxide.

Mail in conversion registration.

Static WC

%CO2 High Fire %CO2 Low Fire

ppm CO High Fire ppm CO Low Fire

uA High Fire uA Low Fire

DHW Setpoint DHW Dierential

%CO2 High Fire %CO2 Low Fire

ppm CO High Fire ppm CO Low Fire

Dynamic WC

Table 33 - Installation Checklist

Part 14 - Maintenance Report

In unusually dirty or dusty conditions, care must be taken to keep boiler cabinet door in place at all times. Failure to do so VOIDS the warranty.

Allowing the boiler to operate with a dirty combustion chamber will hurt operation. Failure to clean the heat exchanger as needed by the installation location could result in boiler failure, property damage, personal injury, or death. Such product failures ARE NOT covered under warranty.

The boiler requires minimal periodic maintenance under normal conditions. However, in unusually dirty or dusty conditions, periodic vacuuming of the cover to maintain visibility of the display and indicators is recommended. Periodic maintenance should be performed once a year by a qualied service technician to assure that all the equipment is operating safely and eciently. The owner should make necessary arrangements with a qualied heating contractor for periodic maintenance of the boiler. Installer must also inform the owner that the lack of proper care and maintenance of the boiler may result in a hazardous condition.

LP-551 Rev. 3.9.16

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Inspection Activities Date Last Completed

Piping 1st Year 2nd Year 3rd Year 4th Year*

Near boiler piping

Vent

System 1st Year 2nd Year 3rd Year 4th Year*

Visual Do a full visual inspection of all system components.

Functional Test all functions of the system (Heat, Safeties).

Temperatures

Electrical

Connections Check wire connections. Make sure connections are tight.

Smoke and CO Detector

Circuit Breakers Check to see that the circuit breaker is clearly labeled. Exercise circuit

Chamber / Burner 1st Year 2nd Year 3rd Year 4th Year*

Combustion Chamber

Spark Electrode Clean. Set gap at 1/4” Clean probe with plumbers cloth to remove

Combination Ignitor and Flame Probe

Condensate 1st Year 2nd Year 3rd Year 4th Year*

Neutralizer Check condensate neutralizer. Replace if necessary.

Condensate Pipe Disconnect condensate pipe. Clean out dirt. Fill with water to level

Gas 1st Year 2nd Year 3rd Year 4th Year*

Pressure Measure incoming gas pressure (3.5 to 14” WC).

Pressure Drop Measure drop in pressure on light o (no more than 1” WC).

Check Gas Pipe for Leaks

Combustion 1st Year 2nd Year 3rd Year 4th Year*

CO / CO2 Levels Check CO and CO2 levels in exhaust. See Start-Up Procedures for

Safeties 1st Year 2nd Year 3rd Year 4th Year*

ECO (Energy Cut Out)

Flow Switch Activate heating call and monitor system to ensure ow switch and

Sensors Check wiring. Verify through ohms reading.

Final Inspection 1st Year 2nd Year 3rd Year 4th Year*

Check List Verify that you have completed entire check list. WARNING: FAILURE

Homeowner Review what you have done with the homeowner.

Table 34 - *Continue annual maintenance beyond the 4th year as required.

Check boiler and system piping for any sign of leakage; make sure pipes are properly supported.

Check condition of all vent pipes and joints. Ensure the vent piping terminations are free of obstructions and blockages.

Verify safe settings on boiler or anti-scald valve.

Verify programmed temperature settings.

Verify devices are installed and working properly. Change batteries if necessary.

breaker.

Check burner tube and combustion chamber coils. Clean according to maintenance section of manual. Vacuum combustion chamber. Replace any gaskets that show signs of damage.

oxides.

Check ionization in uA (d7 in Status Menu in Start-Up Procedures). Record high re and low re. Clean probe with plumbers cloth to remove oxides.

of outlet and reinstall. (NOTE: Verify the ow of condensate, making sure that the hose is properly connected during nal inspection.)

Check gas piping. Test for leaks and signs of aging. Make sure all pipes are properly supported.

ranges. Record at high and low re.

Check continuity on ue and water ECO. Replace if corroded.

pump are operating correctly.

TO DO SO COULD RESULT IN SERIOUS INJURY OR DEATH.

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ADDITIONAL INSTALLATION REQUIREMENTS

ANSI/UL 2034 listed and IAS certified.

FOR THE COMMONWEALTH OF MASSACHUSETTS

In the Commonwealth of Massachusetts, the installer or service agent shall be a plumber or gas fitter licensed by the Commonwealth.

When installed in the Commonwealth of Massachusetts or where applicable state codes may apply; the unit shall be installed with a CO detector per the requirements listed below.

5.08: Modifications to NFPA-54, Chapter 10

(1) Revise NFPA-54 section 10.5.4.2 by adding a second exception as follows:

Existing chimneys shall be permitted to have their use continued when a gas conversion burner is installed, and shall be equipped with a manually reset device that will automatically shut off the gas to the burner in the event of a sustained back-draft.

(2) Revise 10.8.3 by adding the following additional requirements:

(a) For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied:

1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time of installation of the side wall horizontal vented gas fueled equipment, the installing plumber or gasfitter shall observe that a hard wired carbon monoxide detector with an alarm and battery back-up is installed on the floor level where the gas equipment is to be installed. In addition, the installing plumber or gasfitter shall observe that a battery operated or hard wired carbon monoxide detector with an alarm is installed on each additional level of the dwelling, building or structure served by the side wall horizontal vented gas fueled equipment. It shall be the responsibility of the property owner to secure the service of qualified licensed professionals for the installation of hard wired carbon monoxide detectors

a. In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an attic, the hard wired carbon monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level.

b. In the event that the requirements of this subdivision cannot be met at the time of completion of installation, the owner shall have a period of thirty (30) days to comply with the above requirements; provided, however, that during said thirty (30) day period, a battery operated carbon monoxide detector with an alarm shall be installed.

2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required in accordance with the above provisions shall comply with NFPA 720 and be

LP-172

REV. 02/16/06

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3. SIGNAGE. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment. The sign shall read, in print size no less than one-half (1/2) inch in size, “GAS VENT DIRECTLY BELOW, KEEP CLEAR OF ALL OBSTRUCTIONS”.

4. INSPECTION. The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR 5.08 (2)(a) 1 through 4.

(b) EXEMPTIONS: the following equipment is exempt from 248 CMR 5.08 (2)(a) 1 through 4:

1. The equipment listed in Chapter 10 entitled “Equipment Not Required to be Vented” in the most current edition of NFPA 54 as adopted by the Board; and

2. Product Approved side wall horizontally vented gas fueled equipment installed in a room or structure separate from the dwelling, building or structure used in whole or in part for residential purposes.

(c) MANUFACTURER REQUIREMENTS – GAS EQUIPMENT VENTING SYSTEM PROVIDED. When the manufacturer of Product Approved side wall horizontally vented gas equipment provides a venting system design or venting system components with the equipment, the instructions provided by the manufacturer for installation of the equipment and the venting system shall include:

1. Detailed instructions for the installation of the venting system design or the venting system components; and

2. A complete parts list for the venting system design or venting system.

(d) MANUFACTURER REQUIREMENTS – GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED. When the manufacturer of a Product Approved side wall horizontally vented gas fueled equipment does not provide the parts for venting the flue gases, but identifies “special venting systems”, the following requirements shall be satisfied by the manufacturer:

1. The referenced “special venting system” instructions shall be included with the appliance or equipment installation instructions; and

2. The “special venting systems” shall be Product Approved by the Board, and the instructions for that system shall include a parts list and detailed installation instructions.

(e) A copy of all installation instructions for all Product Approval side wall horizontally vented gas fueled equipment, all venting instructions, all parts lists for venting instructions, and/or all venting design instructions shall remain with the appliance or equipment at the completion of the installation.

LP-172

LP-551 Rev. 3.9.16

REV. 02/16/06

Page 65

VWH

Limited Warranty

Five year warranty to assure your complete satisfaction.

HTP warrants each VWH to be free from defects in material and workmanship according to the following terms, conditions and time periods. UNLESS OTHERWISE NOTED THESE WARRANTIES

COMMENCE ON THE DATE OF INSTALLATION.

COVERAGE

A. During the first year after the date of installation, HTP warrants that it will repair or replace, at its option, without charge, any defective VWH or malfunctioning component thereof that is found to have failed due to manufacturer’s defect. HTP will NOT accept claims from the purchaser for labor costs incurred as a result of the repair, replacement, removal, or reinstallation of a VWH or any component thereof. It is expressly agreed between HTP and the purchaser that repair or replacement are the exclusive remedies of the purchaser. B. During the second through fifth year after the date of installation, HTP warrants that it will repair or replace, at its option, without charge, any defective VWH that is found to have failed due to manufacturer’s defect. No other component of the VWH will be replaced during this period (with exception to the blower motor, which will have a limited warranty of 3 years). HTP will NOT accept claims from the purchaser for labor costs incurred as a result of the repair, replacement, removal, or reinstallation of a VWH or any component thereof. It is expressly agreed between HTP and the purchaser that repair or replacement are the exclusive remedies of the purchaser. C. Should a defect or malfunction result in a leakage of water within the above-stated warranty periods due to defective material or workmanship, malfunction or failure to comply with the above warranty, such as defects or malfunctioning having been verified by an authorized HTP representative, then HTP will replace the defective or malfunctioning VWH with a replacement VWH of the nearest comparable model available at the time of replacement. D. If HTP is unable to repair or replace a VWH so as to conform to this warranty after a reasonable number of attempts, HTP will then provide, at its option, a replacement unit. These remedies are the purchaser’s exclusive remedies for breach of warranty. E. If, at the time of a request for service the purchaser cannot provide a copy of the original sales receipt or the warranty card registration, the warranty period for the VWH shall then be deemed to have commenced thirty (30) days after the date of manufacture of the VWH and NOT the date of installation of the VWH. F. Replacement parts will be warranted for ninety (90) days.

OWNER’S RESPONSIBILITIES

The owner or installer must:

1. To avoid the exclusion list in this warranty, it is recommended that the VWH be maintained in accordance to the maintenance procedure listed in the installation manual. Preventive maintenance can help to avoid any unnecessary breakdown of your appliance and keep your appliance running at its optimum efficiency.

2. All related heating components must be maintained in good operating condition.

3. All lines must be checked to confirm that all condensate drains properly from the unit.

4. Operate the VWH at pressures not exceeding the working pressure shown on the rating plate.

5. Use the VWH in a system with a properly sized and installed thermal expansion tank.

6. Make provisions so if the VWH or any component part or connection thereto should leak, the resulting flow of water will not cause damage to the area in which it is installed.

WARRANTY EXCLUSIONS

HTP does not warrant:

1. All labor charges incurred by any person in connection with the examination or replacement of parts claimed by the purchaser to be defective.

2. Any failed components of the heat system not manufactured by HTP as part of the VWH.

3. VWHs repaired or altered without prior written approval of HTP so as to affect adversely their reliability.

4. Any damages, defects or malfunctions resulting from improper maintenance, misuse, abuse, accident, negligence, freezing and the like.

5. Any damage or failure resulting from hard water scale buildup on the tank heat exchanger tubes.

6. Any damage or failure resulting from contaminated air, including, but not limited to, sheetrock particles, plasterboard particles, dirt or dust, being introduced into the VWH or its components including, but not limited to, the outside tubes of the heat exchanger.

7. Damages, malfunctions, or failures resulting from failure to install the VWH in accordance with applicable building codes/ordinances or good plumbing and electrical trade practices.

8. Damages, malfunctions, or failures resulting from improper installation, failure to operate the VWH at pressures not exceeding the working pressure shown on the rating plate, or failure to maintain and operate the VWH in accordance with the manufacturer’s printed instructions.

9. Damages, malfunctions, or failures caused by operating the water heater with modified, altered, or unapproved parts.

10. Failure to operate the VWH in a system with a properly sized and installed thermal expansion tank.

11. Failures or performance problems caused by improper sizing of the water heater, expansion device, or piping.

12. Any damage or failure resulting from improper water chemistry. WATER CHEMISTRY REQUIREMENTS – Sodium less than 20mGL. Water pH between 6.0 and 8.0. Hardness less than 7 grains. Chlorine concentration less than 100 ppm.

13. Any damages, malfunctions, or failures resulting from the use of dielectric unions.

14. Components of the VWH that are not defective, but must be replaced during the warranty period as a result of reasonable wear and tear.

15. Components of the VWH that are subject to warranties, if any, given by their manufacturers, HTP does not adopt these warranties.

16. Malfunctions resulting from, or repairs necessitated by, flood, fire, wind, or lightning, or uses of the VWH for purposes other than that for which it was designed.

17. Any unit purchased from an unauthorized dealer or any online retailer.

18. Units installed outside the fifty states (and the District of Columbia) of the United States of America and Canada.

PROCEDURES FOR WARRANTY SERVICE REQUESTS

Any claim for warranty assistance must be made promptly. Determine if the VWH is “in-warranty” (that is, within the applicable warranty period) by reviewing a copy of the original sales receipt. You must present a copy of the original sales receipt for a warranty service request. If your VWH is “in-warranty”, contact the retailer from whom the VWH was purchased (or the installer) for assistance. Be prepared to provide the retailer or installer with a copy of your original receipt, complete model and serial numbers, and the date of installation of your VWH, in addition to explanation of your problem. Warranty coverage is subject to validation of “in-warranty” coverage by HTP claims department personnel. All alleged defective or malfunctioning parts must be returned to HTP via the local

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distribution channels where original purchase was made. NOTE: Any parts or VWHs returned to HTP for warranty analysis will become the property of HTP and will not be returned, even if credit is denied.

If all warranty conditions are satisfied, HTP will provide replacement parts to the retailer. If you have questions about the coverage of this warranty, please contact HTP at the address or phone number stated below:

HTP

272 Duchaine Blvd.

New Bedford, MA. 02745

Attention: Warranty Service Department

(800) 323-9651

SERVICE, LABOR AND SHIPPING COSTS

This warranty does not extend to shipping charges, delivery expenses, or administrative fees incurred by the purchaser in repairing or replacing the VWH. This warranty does not extend to labor costs beyond the coverage specified in this warranty document.

LIMITATIONS OF YOUR HTP WARRANTY AND REMEDIES THE FOREGOING WARRANTIES ARE EXCLUSIVE AND ARE GIVEN AND ACCEPTED IN LIEU OF ANY AND ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ANY OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY IN CONTRACT OR TORT, WHETHER OR NOT ARISING FROM HTP’S NEGLIGENCE, ACTUAL OR IMPUTED. THE REMEDIES OF THE PURCHASER SHALL BE LIMITED TO THOSE PROVIDED HEREIN TO THE EXCLUSION OF ANY OTHER REMEDIES INCLUDING WITHOUT LIMITATION, INCIDENTAL OR CONSEQUENTIAL DAMAGES, SAID INCIDENTAL AND CONSEQUENTIAL DAMAGES INCLUDING, BUT NOT LIMITED TO, PROPERTY DAMAGE, LOST PROFIT OR DAMAGES ALLEGED TO HAVE BEEN CAUSED BY ANY FAILURE OF HTP TO MEET ANY OBLIGATION UNDER THIS AGREEMENT INCLUDING THE OBLIGATION TO REPAIR AND REPLACE SET FORTH ABOVE. NO AGREEMENT VARYING OR EXTENDING THE FOREGOING WARRANTIES, REMEDIES OR THIS LIMITATION WILL BE BINDING UPON HTP. UNLESS IN WRITING AND SIGNED BY A DULY AUTHORIZED OFFICER OF HTP. THE WARRANTIES STATED HEREIN ARE NOT TRANSFERABLE AND SHALL BE FOR THE BENEFIT OF THE ORIGINAL PURCHASER OF A VWH ONLY.

NO OTHER WARRANTIES

Your HTP warranty gives you specific legal rights, and you may also have other rights that vary from state to state. Some states do not allow the exclusion or limitation of incidental or consequential damages so this limitation or exclusion may not apply to you. These are the only written warranties applicable to the VWH manufactured and sold by HTP. HTP neither assumes nor authorizes anyone to assume for it any other obligation or liability in connection with said VWHs. HTP reserves the right to change specifications or discontinue models without notice.

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Maintenance Notes

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Customer Installation Record Form

The following form should be completed by the installer for you to keep as a record of the installation in case of a warranty claim. After reading the important notes at the bottom of the page, please also sign this document.

Customer’s Name

Date of Installation

Installation Address

Product Name / Serial Number(s)

Comments

Installer’s Code / Name

Installers Phone Number

Signed by Installer

Signed by Customer

Installation Notes

IMPORTANT

Customer: Please only sign after the installer has fully reviewed the installation, safety, proper operation, and maintenance of the system. If the system has any problems please call the installer. If you are unable to make contact, please call your sales representative. Distributor / Dealer: Please insert contact details.

LP-551 Rev. 3.9.16

HTP EP-220 VWH, EP-299 VWH, EP-399 VWH, EP-301 VWH Installation, Start-up, Maintenance, Parts, Warranty

Specifications and Main Features

Frequently Asked Questions

User Manual