Lennox GWB8-042IE-2, GWB8-075IE-2, GWB8-112IE-2, GWB8-150IE-2, GWB8-187IE-2 Installation Instructions Manual

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PRODUCT LITERATURE

Lennox Industries Inc. Dallas, Texas

INSTALLATION

INSTRUCTIONS

GWB8-042IE-2, GWB8-075IE-2

GWB8-112IE-2, GWB8-150IE-2

GWB8-187IE-2, GWB8-225IE-2

GAS FIRED BOILER

RETAIN THESE INSTRUCTIONS FOR

FUTURE REFERENCE

These instructions must be afﬁ xed on

or adjacent to the boiler .

WARNING

Improper installation, adjustment, alteration, service, or maintenance could result in death or serious injury. Refer to this manual for assistance. For additional information consult a qualiﬁ ed installer, service agency, or the gas supplier.

This boiler cannot be used with all types of chimneys. Read these instructions carefully

before installing.

C.S.A. Certiﬁ ed

For Natural Gas Or Propane

Tested For 50 psi.

ASME

Working Pressure

GAS-FIRED HOT WATER BOILERS

These Gas-Fired Water boilers are low pressure, sectional cast iron boilers Design Certiﬁ ed by CSA (Canadian Standards Association) for use with Natural and Propane Gases. They are constructed and hydrostatically tested for maximum working pressure of 50 psi (pounds per square inch) in accordance with A.S.M.E. (American Society of Mechanical Engineers) Boiler and Pressure Vessel Code Section IV Standards for Cast Iron Heating Boilers.

P/N# 240009135, Rev. C [06/2012]

TABLE OF CONTENTS

Boiler Ratings & Capacities...................... 3

Dimensions ............................................. 4

Installation Procedure ............................. 5

Ventilation & Combustion Air .................. 6

Installation System Piping ...................... 7

Vent Installation ................................... 10

Optional Horizontal Venting Instruction 13

Gas supply Piping .................................. 14

Electrical Wiring .................................... 16

Sequence of Operation .......................... 15

Wiring Diagrams ................................... 18

Starting Your Boiler ............................... 19

Checking and Adjusting ......................... 21

Maintaining Your Boiler ......................... 23

Service Hints ......................................... 24

Equipment & Optional Accessories ........ 25

Appendix A - Control Module ................. 27

A.1 Installation Environment Considerations .27

A.2 Electrical Connections .......................... 27

A.3 Adjusting Settings ............................... 27

A.4 Display .............................................. 27

KEEP THIS MANUAL NEAR BOILER

RETAIN FOR FUTURE REFERENCE

Safety Symbols & Warnings

The following deﬁ ned symbols are used throughout this manual to notify the reader of potential hazards of varying risk levels.

DANGER

Indicates a hazardous situation which, if not avoided, WILL result in death or serious injury

WARNING

Indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION

Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE

Used to address practices not related to personal injury.

IMPORTANT: Read the following instructions

COMPLETELY before installing!!

A.5 Operation .......................................... 28

A.6 Boiler High Limit Temperature Controller 29

A.7 Troubleshooting .................................. 29

A.8 Troubleshooting Error Codes ................. 29

A.9 Intermittent Pilot ................................ 30

WARNING

Fire, explosion, asphyxiation and electrical shock hazard. Improper installation could result in death or serious injury. Read this manual and understand all requirements before beginning installation.

WARNING

Keep boiler area clear and free from combustible materials, gasoline and other ﬂ ammable vapors and liquids.

DO NOT obstruct air openings to boiler room. Modiﬁ cation, substitution or elimination of factory

equipped, supplied or speciﬁ ed components may result in personal injury or loss of life.

TO THE OWNER - Installation and service of this boiler must be performed by a qualiﬁ ed installer.

TO THE INSTALLER - Leave all instructions with boiler for future reference.

When this product is installed in Commonwealth of Massachusetts installation must be performed by Licensed Plumber or Licensed Gas Fitter.

BOILER RATINGS & CAPACITIES

Table 1 RATINGS NATURAL AND PROPANE GASES

**Net

Model

GWB8-042IE-2 42.5 36 31 84.4 4 3

GWB8-075IE-2 75.0 63 55 83.4 4 3

GWB8-112IE-2 112.5 94 82 83.0 4 3

GWB8-150IE-2 150.0 125 109 82.7 4 3

GWB8-187IE-2 187.5 155 135 82.3 4 4

GWB8-225IE-2 225.0 186 162 82.0 4 4

* MBH = 1,000 Btuh = British Thermal Unit Per Hour. Boilers are equipped for altitudes up to 2,000 feet only.

Input *Mbh

Heating

Capacity

*Mbh

AHRI

Rating

Water

*Mbh

AFUE

Vent Diameter (Inches)

To Chimney

(Category I)

Horizontal Vent

(Category III)

• U.S.A. Only - For altitudes above 2,000 feet, ratings should be reduced at the rate of 4% for each 1,000 feet above sea level.

• Canada Only - Boilers may be used at high altitude (2,000-4500 feet/640-1350m) by using a certiﬁ ed ﬁ eld conversion kit, resulting in a 10% de-rate. Contact Provincial authority having jurisdiction for

installations above 4500 ft (1350m)above sea level.+ Heating Capacity based on D.O.E. (Department of Energy) test procedure.

** Net AHRI Water Ratings i

ndicate amount of remaining heat input that can be used to heat the radiation or terminal units. Net AHRI Ratings shown are based on an allowance of 1.15 Selection of boiler size should be based upon “Net AHRI Rating” being equal to or greater than calculated heat loss of building.

Manufacturer should be consulted before selecting a boiler for installations having unusual piping

and pickup requirements.

New York City MEA Number 484-84-E Vol. IV.

This boiler cannot be used with all types of chimneys. Read these instructions carefully before installing. These Gas-Fired Hot Water Boilers are low pressure, sectional cast iron boilers Design Certiﬁ ed by C.S.A. (Canadian Standards

Association) for use with Natural and Propane Gases. Constructed and hydrostatically tested for maximum working pressure of 50 psi in accordance with A.S.M.E. Boiler and Pressure Vessel Code Section IV Standards for cast iron heating boilers.

Boilers must stand on noncombustible ﬂ oor. If installed on combustible ﬂ oor, please refer to Repair Parts manual for appropriate Combustible Floor Base part number.

Boilers For Use At High Altitude

Boiler is factory equipped for use at altitudes of 0-2,000 feet above sea level. For use at altitudes above 2,000 feet above sea level, input ratings are reduced by change in main burner oriﬁ ce size.

U.S.A. Only - For altitudes above 2,000 feet above sea level, input ratings should be reduced at rate of 4% for each 1,000 feet above sea level. Consult National Fuel Gas Code, ANSI Z223.1/NFPA 54, and/or Natural Gas and Propane Installation Code, CAN/CSA B149.1, or manufacturer for correct oriﬁ ce sizing information.

Canada Only - For altitudes in the range of 2,000-4,500 feet (610 - 1350m) above sea level, boilers may be ﬁ eld equipped for use at high altitude by using a certiﬁ ed ﬁ eld conversion kit. The change in main burner oriﬁ ce size results in the boiler’s input rating being reduced by 10%.The conversion shall be carried out by a manufacturer’s authorized representative, in accordance with the requirements of the manufacturer, provincial or territorial authorities having jurisdiction and in accordance with the requirements of CSA-B149 Natural Gas and Propane Installation Code. The certiﬁ ed ﬁ eld conversion kit includes a conversion data plate, which must be attached to the boiler adjacent to the rating plate, indicating that the boiler has been converted for high altitude use. The conversion data plate must be ﬁ lled in with the correct conversion information.

For altitudes over 4500 feet (1350m), contact Provincial authority having jurisdiction.

DIMENSIONS

Model Width (A)

GWB8-042IE-2 11 GWB8-075IE-2 14-1/4 GWB8-112IE-2 17-1/2 GWB8-150IE-2 20-3/4 GWB8-187IE-2 24 GWB8-225IE-2 27-1/4

INSTALLATION PROCEDURE

WARNING

Improper installation, adjustment, alteration, service or maintenance could result in death or serious injury

The installation must conform to the requirements of the authority having jurisdiction or, in the absence of such requirements, to the National Fuel Gas Code, ANSI Z223.1/NFPA 54, and/or Natural Gas and Propane Installation Code, CAN/CSA B149.1

Where required by authority having jurisdiction, installation must conform to the Standard for Controls and Safety Devices for Automatically ﬁ red Boilers, ANSI/ASME CSD-1.

This boiler series is classiﬁ ed as a Category I. Vent installation shall be in accordance with “Venting of Equipment ,” of the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or “Venting Systems and Air Supply for Appliances,” of the Natural Gas and Propane Installation Code, CAN/CSA B149.1, or applicable provisions of the local building codes.

Boiler has met safe lighting and other performance criteria with gas manifold and control assembly on boiler per latest revision of ANSI Z21.13/CGA 4.9.

Install such that gas ignition system components are protected from water (dripping, spraying, rain, etc.) during appliance operation and service, (circulator replacement, condensate trap, control replacement, etc.).

Locate boiler on level, solid base as near chimney as possible and centrally located with respect to heat distribution system as practical.

Verify you have the right size boiler before starting installation. See rating and capacity table.

When installed in utility room, door should be wide enough to allow largest boiler part to enter, or to permit replacement of another appliance such as water heater.

Boiler installed in building under construction, take care to insure clean combustion air supply during construction process. Airborne particulates such as from drywall dust and from ﬁ berglass insulation can clog burner ports and cause incomplete combustion and sooting.

WARNING

Fire hazard. Do not install boiler on combustible ﬂ ooring or carpeting. Failure to follow these instructions could result in death or serious injury.

NOTICE

Follow local regulations with respect to installation of CO detectors.

10.

FOR INSTALLATION ON NON-COMBUSTIBLE FLOORS ONLY - For installation on combustible

ﬂ ooring special base must be used. (See Replacement Parts Section.) Do Not Install Boiler on carpeting.

11.

Verify boiler is supplied with correct type of gas, fresh air for combustion, and suitable electrical supply.

Figure 1 - Minimum Clearances To Combustible

Construction

6”

8”

Rear

Opposite Side

6”

Boiler

Front

18”

Table 2 - BOILER MINIMUM CLEARANCE TO

COMBUSTIBLES

Unit

Top 6” (152mm)

Rear 6” (152mm)

Control Side 8” (203mm)

Opposite Side 6” (152mm)

Front (Alcove) 18” (457mm)

Flue/Vent Connector 6” (152mm)

Near Boiler Piping 1/2” (13mm)

Control Side

8”

Minimum

Clearances

Set unit on concrete or other noncombustible material base or ﬂ oor. DO NOT INSTALL ON CARPETING.

VENTILATION & COMBUSTION AIR

Provide combustion air and ventilation air in accordance with the section “Air for Combustion and Ventilation,” of the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or Sections

8.2, 8.3 or 8.4 of Natural Gas and Propane Installation Code, CAN/CSA B149.1, or applicable provisions of local building codes.

Provide make-up air where exhaust fans, clothes dryers, and kitchen ventilation equipment interfere with proper operation.

National Fuel Gas Code recognizes several methods of obtaining adequate ventilation and combustion air. Requirements of the authority having jurisdiction may override these methods.

• Engineered Installations. Must be approved by authority having jurisdictions.

• Mechanical Air Supply. Provide minimum of 0.35 cfm per Mbh for all appliances located within space. Additional requirements where exhaust fans installed. Interlock each appliance to mechanical air supply system to prevent main burner operation when mechanical air supply system not operating.

• All Indoor Air. Calculate minimum volume for all appliances in space. Use a different method if minimum volume not available.

о Standard Method. Cannot be used if known air

National Gas and Propane Installation Code Requires providing air supply in accordance with:

inﬁ ltration rate is less than 0.40 air changes per hour. See Table 3 for space with boiler only. Use equation for multiple appliances.

Volume ≥ 50 ft

x Total Input [Mbh]

о Known Air Inﬁ ltration Rate. See Table 3 for

space with boiler only. Use equation for multiple appliances. Do not use an air inﬁ ltration rate (ACH) greater than 0.60.

Volume ≥ 15 ft3/ACH x Total Input [Mbh]

о Refer to National Fuel Gas Code for opening

requirements between connection indoor spaces.

• All Outdoor Air. Provide permanent opening(s) communicating directly or by ducts with outdoors.

о Two Permanent Opening Method. Provide opening

commencing within 12 inches of top and second opening commencing within 12 inches of bottom enclosure.

 Direct communication with outdoors or

communicating through vertical ducts. Provide minimum free area of 1 in

per 4 Mbh of total

input rating of all appliances in enclosure.

 Communicating through horizontal ducts.

Provide minimum free area of 1 in2 per 2 Mbh of total input rating of all appliances in enclosure.

о One Permanent Opening Method. Provide opening

commencing within 12 inches of top of enclosure. Provide minimum clearance of 1 inch on sides and back and 6 inches on front of boiler (does not supersede clearance to combustible materials).

о Combination Indoor and Outdoor Air. Refer to

National Fuel Gas Code for additional requirements for louvers, grilles, screens and air ducts.

• Combination Indoor and Outdoor Air. Refer to National Fuel Gas Code for application information.

• Section 8.2 and 8.3 when combination of appliances has a total input of up to and including 400 Mbh (120 kW).

о Does not have draft control device.

• Section 8.4 when combination of appliances has total input exceeding 400 Mbh (120 kW).

• Refer to Natural Gas and Propane Installation Code for speciﬁ c air supply requirements for enclosure or structure where boiler is installed, including air supply openings and ducts.

Input Mbh

Standard

Method

0.1 0.2 0.3 0.4 0.5 0.6

42.5 2125 6375 3188 2125 1594 1275 1063

75 3750 11250 5625 3750 2813 2250 1875

112.5 5625 16875 8438 5625 4219 3375 2813

150 7500 22500 11250 7500 5625 4500 3750

187.5 9375 28125 14063 9375 7031 5625 4688

225 11250 33750 16875 11250 8438 6750 5625

Table 3- Air Inﬁ ltration Rate

Known Air Inﬁ ltration Rate Method (Air Changes Per Hour)

INSTALLATION SYSTEM PIPING

WARNING

Burn or Scald Hazard. Discharge line shall be installed to relief valve outlet connection to avoid burns, scalding, or water damage due to discharge of steam and/or hot water during operation.

Discharge line shall:

• connect to relief valve outlet and piped down to safe point of disposal. Check local codes for maximum distance from ﬂ oor or allowable safe point of discharge.

• be of pipe size equal to or greater than that of the relief valve outlet over the entire length of discharge line;

• have no intervening shutoff valve between safety relief valve and discharge to atmosphere (do not plug or place any obstruction in discharge line.

• terminate freely to atmosphere where any discharge will be clearly visible and at no risk of freezing;

• allow complete drainage of the valve and the discharge line;

• be independently supported and securely anchored to avoid applied stress on the relief valve;

• be as short and straight as possible;

• terminate with plain end (not threaded);

• be constructed of material suitable for exposure to temperatures of 375° F; or greater.

Refer to local codes and appropriate ANSI/ASME Boiler and Pressure Vessel Code, Section IV, or Boiler, Pressure Vessel and Pressure Piping Code, CSA B51 for additional installation requirements.

Refer to local codes and appropriate ASME Boiler and Pressure Vessel Code for additional installation requirements.

Install relief valve on 3/4” pipe nipple in tapped boiler opening.

A. Pipe discharge line following guidelines in preceding

Warning. See Figure 2.

B. Discharge line pipe size shall be equal or greater

than that of relief valve outlet over entire length of discharge line with no intervening shutoff valve between safety relief valve and discharge to atmosphere.

C. Discharge line shall terminate with plain end to

atmosphere where any discharge will be clearly visible and is at no risk of freezing.

D. Discharge line shall be independently supported to

avoid applied stress on relief valve.

E. Installation shall allow complete drainage of relief

valve and discharge line.

Install Drain Valve on lower left side of boiler as marked.

Install Temperature and Pressure Gauge into ¼” bushing threaded in tee furnished with supply piping. See

Figures 3 and 4

Connect Supply and Return Lines to boiler. Figure 3 &

4. Connections may require certain additional ﬁ ttings and parts.

Figure 2 - Safety Relief Valve Discharge Piping

RELIEF VALVE

DISCHARGE

PIPING

Check local codes

for maximum

distance from

ﬂ oor or other

allowable safe

point of discharge

INSTALLATION SYSTEM PIPING

Figure 3 -

Forced Hot Water Typical Piping

Figure 4 - Forced Hot Water Typical Piping

With Zone Control Valve

INSTALLATION SYSTEM PIPING

• Install radiation units (panels, radiators or cabinets) and supply and return mains ﬁ rst then make connections at boiler.

• Verify clean water supply is available when connecting cold water supply to water valve. Install sand strainer at pump when water supply is from well or pump.

• Provide low water cutoff device when boiler is installed above radiation level or as required by the Authority having jurisdiction, either provide as part of boiler or at time of boiler installation. Periodic inspection is necessary, as is ﬂ ushing of ﬂ oat type devices, per manufacturers speciﬁ c instructions.

• Boiler used in connection with refrigeration systems shall be installed so chilled medium is piped in parallel with heating boiler with appropriate valves to prevent chilled medium from entering heating boiler. See

• Boiler connected to heating coils located in air handling units exposed to refrigerated air circulation, piping system shall be equipped with ﬂ ow control valves or other automatic means to prevent gravity circulation of boiler water during cooling cycle.

Figure 5

Low Design Water Temperature Systems (Below 140°F) And Large Water Content Systems

Condensation is corrosive and can eventually cause severe damage to boiler and venting system.

• Minimum design return water temperature to prevent

• Boiler used in heating systems where design water

• Boiler connected to system having large water content

condensation in boiler and venting is 120°F. Minimum high limit setting is 140°F.

temperatures below 140°F are desired (e.g. radiant ﬂ oor heating), a 3-way or 4-way mixing valve or suitable alternative is required to prevent low temperature return water from entering boiler. When using mixing valve, follow manufacturer’s installation instructions.

(such as former gravity system), suggest use of bypass piping. See

Figure 6

Figure 5

- Piping Arrangements For Boiler When Used In Connection With Refrigeration System

Figure 6

- Bypass Piping

VENT INSTALLATION

Check Your Chimney

Chimney must be clean, right size, properly constructed and in GOOD CONDITION.

Installation must conform to requirements of the authority having jurisdiction or, in absence of such requirements, to the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or of the Natural Gas and Propane Installation Code, CAN/CSA B149.1, or applicable provisions of the local building codes..

Boiler’s induced draft blower has 3” outlet. 3” X 4” increaser ﬁ tting is included in parts bag. Locate increaser ﬁ tting on outlet of induced draft blower, and secure gas-tight with bead of furnished silicone sealant. Increaser ﬁ tting is required on this boiler for Category I venting, and 4” is minimum permissible vent diameter. This does not imply vent connector is intended to be 4” diameter pipe. Vent connector shall be sized according to appropriate venting tables in the National Fuel Gas Code and may be required to be larger than 4” diameter.

NOTICE

Boiler installation for chimney venting is not complete unless increaser ﬁ tting is located and secured.

These are high efﬁ ciency boilers with low stack or exhaust temperature.

Venting into masonry chimney without liner, line chimney from top to bottom with either:

A. Listed Type B vent pipe B. Listed ﬂ exible vent liner C. Poured ceramic liner.

11.

Fasten sections of vent pipe with sheet metal screws to make piping rigid. Use stovepipe wires to support pipe from above.

12.

Do not connect to ﬁ replace ﬂ ue.

13.

Do not install damper on this boiler.

Minimum Vent Pipe Clearance

• Use Type B vent pipe through crawl space. Where vent pipe passes through combustible wall or partition, use ventilated metal thimble. Thimble should be 4 inches larger in diameter than vent pipe.

• Boiler installed with single wall vent, must have 6” clearance between its surface and any combustible material. New Type B gas vent or ﬂ exible liner must be installed in accordance with instructions furnished with vent. Maintain clearances as speciﬁ ed for vent pipe.

• Verify vent pipe is ﬁ re-stopped where it goes through ﬂ oor or ceiling. It should have approved vent cap with clearances from roof. If clearances are less than shown in have vent checked by local authorities. See Figure 7, Page 11.

• Vent connectors serving appliances vented by natural draft shall not be connected into any portion of mechanical draft systems operating under positive pressure.

Outside chimneys should not be used unless they are (choose one of the following):

A. Enclosed in a chase B. Lined with Type B vent pipe C. Use listed ﬂ exible vent liner D. Use certiﬁ ed chimney lining system

Vent connector from boiler to chimney should run as directly as possible with as few elbows as possible.

Where possible, it is recommended to common vent water heater and boiler. Consult appropriate Vent Sizing Tables in National Fuel Gas Code for speciﬁ c requirements of multiple appliance venting.

Boiler is only appliance connected to vent, Type B vent pipe is recommended for vent connector.

Slope pipe up from boiler to chimney not less than 1/4” per foot (21mm/m).

10.

End of vent pipe must be ﬂ ush with inside face of chimney ﬂ ue. Use sealed-in thimble for chimney connection.

Figure 7 - Type B Gas Vent

VENT INSTALLATION

CHECK YOUR CHIMNEY

For boilers for connection to gas vents or chimneys, vent installations shall be in accordance with “Venting of Equipment”, of the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or of the Natural Gas and Propane Installation Code, CAN/CSA B149.1, or applicable provisions of the local building codes.

VENT INSTALLATION

Removing Existing Boiler From Common Venting System

When an existing boiler is removed from a common venting system, the common venting system is likely to be too large for proper venting of the appliances remaining connected to it.

At the time of removal of an existing boiler, the following steps shall be followed with each appliance remaining connected to the common venting system placed in operation, while the other appliance remaining connected to the common venting system are not in operation.

Seal any unused openings in the common venting system.

Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or restriction, leakage, corrosion and other deﬁ ciencies which could cause an unsafe condition.

Insofar as is practical, close all building doors and windows and all doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the building. Turn on clothes dryers and any appliance not connected to the common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. Close ﬁ replace dampers.

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

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

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

Any improper operation of the common venting system should be corrected so the installation conforms with the National Fuel gas Code, ANSI Z223.1/NFPA 54, and/or the Natural Gas and Propane Installation Code, CAN/CSA B149.1. When re-sizing any portion of the common venting system, the common venting system should be re-sized to approach the minimum size determined using the appropriate tables in Chapter 13 of the National Fuel Gas Code, ANSI Z223.1/NFPA 54, and/or the Natural Gas and Propane Installation Code, CAN/CSA B149.1.

It is recommended that existing gas vents be checked to be sure they meet local codes.

OPTIONAL HORIZONTAL VENTING INSTRUCTION

Horizontal venting with a power venter is an alternate method of sidewall venting. This boiler is CSA listed for sidewall venting with standard single wall galvanized or Type B vent pipe when using the following power venter kits, which were speciﬁ cally sized for these boilers:

Table 4- Field Controls

Number Of

Boiler Sections

2, 3, 4, 5 SWG-4D

6, 7 SWG-5D

Some possible reasons for using a power venter for sidewall venting:

May be preferred by local codes.

Need a vent piping run beyond 30’ (9.1m) (but not more than 50’ (15.2m)).

The boiler installation site experiences gusting or high winds. A power venter can help prevent the boiler from short cycling due to gusting or high winds by providing vent exhaust pressures greater than the boiler’s induced draft blower alone.

When installers or homeowners prefer a negative pressure vent system instead of a positive pressure vent system.

May be more cost effective than stainless steel venting, particularly at longer vent length.

The Field Controls power vent kit includes either a SWG-II-4HD or SWG-II-5 power venter, a MG-1 4”

barometric draft controller, and the CK-43D controls kit.

Field Controls

Power Venter

Conﬁ rm that installing a power venter is an option allowed by local codes. Follow the speciﬁ c power venter installation instructions issued with the power venter kits. Although the power venter is equipped with its own fan, the fan on the boiler remains in place and is unaltered when a power venter is used.

When sidewall venting, ﬂ ue gases must be vented to a point in relation to the prevailing wind so that they may freely disperse without being blown back at the building causing discoloration, or into the building through doors or windows causing odors. Also, under certain conditions ﬂ ue gases will condense, forming moisture. In such cases, steps should be taken to prevent building materials at the vent terminal from being damaged by the exhausted ﬂ ue gas.

When installing single wall galvanized vent pipe for power venting follow the speciﬁ c power venter installation instructions for layout, location of the barometric draft control and termination connections.

When joining and sealing the single wall galvanized or Type B vent piping, use RTV silicone sealant with a minimum temperature rating of 400°F. For 3” vent pipe runs, begin with the female end of the vent pipe over the boiler’s induced draft blower outlet. For 4” vent pipe runs begin with the galvanized 3” to 4” increaser ﬁ tting (included in the boiler’s parts bag) over the induced draft blower outlet. Then follow by placing the female end of the 4” vent pipe over the increaser ﬁ tting.

When joining pieces of single wall galvanized vent pipe, a substantial bead of silicone should be used at the joint to insure a leak proof connection.

GAS SUPPLY PIPING

CAUTION

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 gas supplier’s instructions.

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

Figure 8 - Gas Piping At Boiler

Connecting Gas Piping

Gas line enters boiler from right side. Flexible gas connectors must never breach any boiler openings.

• Use piping materials and joining methods acceptable to authority having jurisdiction. In absence of such requirements:

• USA - National Fuel gas Code, ANSI Z223.1/NFPA 54

• Canada - Natural Gas and Propane Installation Code, CAN/CSA B149.1

• All pipe compound must be resistant to liqueﬁ ed petroleum gas.

• Install ground joint union in gas supply line between shut-off valve and boiler controls.

• Install sediment trap upstream of gas controls.

• Use two pipe wrenches when making connection to gas valve to keep it from turning.

• Install manual shut-off valve in vertical pipe about 5 feet (1.5m) above ﬂ oor. See Figure 8.

• Tighten all joints securely.

• Propane gas connections should only be made by licensed propane installer.

• Two-stage regulation should be used by propane installer.

• Propane gas piping should be check by propane installer.

Table 5 - Gas Pressures

PRESSURE

MIN. SUPPLY 5" w.c. 11" w.c.

MAX. SUPPLY 13.5" w.c. 13.5" w.c.

MANIFOLD 3.5" w.c. 10" w.c.

Verify minimum pressure while boiler is operating. Verify maximum pressure when boiler is not operating

NATURAL PROPANE

GAS

Check Gas Supply

Gas pipe must be correct size for length of run and for total BTU per hour input of all gas utilization equipment connected to it. See Table 6 & 7, Page 15 for proper size. Be sure your gas line complies with local codes and gas company requirements.

DANGER

Fire Hazard. Do not use matches, candles, open ﬂ ames, or other methods providing ignition source. Failure to comply will result in death or serious injury.

Check Gas Piping

Pressure test boiler and gas connection before placing boiler in operation.

• Pressure test over 1/2 psig (3.5 kPa). Disconnect boiler and its individual gas shutoff valve from gas supply system.

• Pressure test at 1/2 psig (3.5 kPa) or less. Isolate boiler from gas supply system by closing manual gas shutoff valve. See Figure 8.

• Locate leakage using gas detector, noncorrosive detection ﬂ uid, or other leak detection method acceptable to authority having jurisdiction.

• Correct leaks immediately and retest.

GAS SUPPLY PIPING

Table 6 - NATURAL GAS

Length of

Pipe - Ft.

20 92,000 190,000 350,000 625,000

40 63,000 130,000 245,000 445,000

60 50,000 105,000 195,000 365,000

Pipe Capacity - BTU Per Hour Input

Includes Fittings

½" ¾" 1" 1¼"

Table 7- PROPANE GAS

Length

Pipe - Ft.

20 131,000 216,000 189,000 393,000

40 90,000 145,000 129,000 267,000

60 72,000 121,000 103,000 217,000

Pipe Capacity - BTU Per Hour Input

Includes Fittings

Copper Tubing* Iron Pipe

⅝"¾"½"¾"

*Outside diameter:

Measure length of pipe or tubing from gas meter or propane second stage regulator.

ELECTRICAL WIRING

WARNING

Electrical shock hazard. Turn OFF electrical power supply at service panel before making electrical connections. Failure to do so could result in death or serious injury.

Electrical Wiring See wiring diagram Figure 10 page 18 for details.

Refer to Ladder Diagram from document envelope received with boiler.

Electrically bond boiler to ground in accordance with requirements of authority having jurisdiction. Refer to:

• USA- National Electrical Code, ANSI/NFPA 70.

• Canada - Canadian Electrical Code, Part I, CSA C22.1: Safety Standard for Electrical Installations.

If any of the original wire as supplied with this appliance must be replaced, it must be replaced with type 105°C thermoplastic wire or its equivalent

Circulator harness is factory wired to control module. Connect harness to circulator in ﬁ eld. See Figure 9.

Electric Power Supply

Run a separate 115 volt circuit from separate over current protective device 15 ampere circuit in electrical service entrance panel.

Connect 115 volt power supply to terminals L1 (HOT) and L2 inside J box.

Run 14 gauge or heavier copper wire from boiler to grounded connection in service panel or properly driven and electrically grounded ground rod.

Thermostat Installation

Thermostat should be installed on an inside wall about four feet above the ﬂ oor.

NEVER install a thermostat on an outside wall.

Do not install a thermostat where it will be affected by drafts, hot or cold pipes, sunlight, lighting ﬁ xtures, televisions, a ﬁ replace, or a chimney.

Check thermostat operation by raising and lowering thermostat setting as required to start and stop the burners.

Instructions for the ﬁ nal adjustment of the thermostat are packaged with the thermostat (adjusting heating anticipator, calibration, etc.)

Set heat anticipator at .2 amps. 24 volt thermostat connects to yellow low voltage wires labled T.

Figure 9 - Control Module Panel

TRANSFORMER

SECONDARY

J BOX

L1 & L2

BLOWER

CIRCULATOR

HARNESS

TRANSFORMER THERMOSTAT WIRES

TRANSFORMER LINE VOLT

R LINE VOL

SEQUENCE OF OPERATION

Sequence of Operation - Figure 10, Page 18.

Thermostat calls for heat, control relay contacts.

Circulator pump is powered through terminals C1 and C2. Control holds off burner and attempts to satisfy thermostat with residual boiler heat.

Induced draft blower and transformer primary are powered.

When blower gets up to speed and blower suction pressure reaches pressure switch set point, pressure switch contacts close sending 24 volts to pilot control from transformer secondary.

Pilot gas valve opens and spark initiates to light pilot burner.

When pilot ﬂ ame is proven, spark drops out.

Main gas valve opens and pilot burner ignites main burners.

If boiler water temperature reaches high limit set point, high limit contacts open, cutting power to blower and pilot control. Burners extinguish and blower stops. Circulator pump continues to run as long as the thermostat continues to call for heat. When boiler water temperature drops past the high limit set point and through the differential, high limit contacts close, repeating steps 3-7.

If venting system becomes blocked, blower suction pressure will drop below pressure switch set point, opening pressure switch contacts and cutting power to pilot control. Burners will extinguish, but blower will remain powered as long as thermostat continues to call for heat. If venting system clears, steps 4-7 will repeat.

10.

Thermostat is satisﬁ ed, ending call for heat. Relay coil is de-energized, opening contacts. Burners extinguish. Blower and circulator pump stop.

Figure 10 - Control Module

WIRING DIAGRAMS

Damper is not an option.

STARTING YOUR BOILER

NOTICE

Do not add water into hot empty boiler.

Filling System With Water

• Close air vents on all radiation units. Open valves to these units.

• Verify boiler and expansion tank drain valves are closed. Air bleed screw on tank drain ﬁ tting should be closed.

• Open valve in line from boiler to expansion tank.

• Open water inlet to your boiler and leave open.

• Start with lowest radiation unit. Open air vent on this unit. When all air has escaped and water starts to ﬂ ow from vent, close it.

• Go to next radiation unit, and repeat this process.

• Repeat until you have covered every radiation unit in system. End at highest unit in system.

• If units have automatic vents, manual venting is unnecessary but it will speed up proper ﬁ lling of system.

• If system is closed expansion tank system, you may have automatic ﬁ ll valve. Leave it open to reﬁ ll system automatically as needed.

• Check temperature-pressure gauge. Note position of hand indicating pressure. This should be between 10 and 15 psi. Any lowering of this movable hand below 10 psi indicates loss of water due to leakage. Automatic ﬁ ll valve should compensate for this. Instructions are packaged with valve.

STARTING YOUR BOILER

WARNING

If you do not follow these instructions exactly, a ﬁ re or explosion may result causing property damage, personal injury or loss of life.

• This appliance is equipped with an ignition device which automatically lights burner. Do NOT try to

light this burner by hand.

• Before operating smell all around appliance area for gas. Be sure to smell next to ﬂ oor because some gas is heavier than air and will settle to the ﬂ oor.

• Use only your hand to turn the gas shutoff valve. Never use tools. If valve will not turn by

hand, do not try to repair it, call a qualiﬁ ed ser- vice technician. Force or attempted repair may result in ﬁ re or explosion.

• Do not use this appliance if any part has been under water. Immediately call a qualiﬁ ed

service technician to inspect appliance and to replace any part of control system and any gas control which has been under water.

LIGHTING PROCEDURE FOR BOILER WITH INTERMITTENT PILOT SYSTEM

For Your Safety, Read Before Operating!!

A. This appliance is equipped with an ignition device

which automatically lights the pilot. Do not try to light appliance by hand.

CAUTION

WHAT TO DO IF YOU SMELL GAS

Operating Instructions.

STOP! Read Safety Information on previous page.

Set the thermostat to lowest setting.

Turn off all electric power to the appliance.

This appliance is equipped with an ignition device which automatically lights the burner. Do not attempt to light pilot by hand.

Remove burner access panel.

Figure 11 - Gas Control Knob

INLET

GAS CONTROL KNOB

SHOWN IN "ON" POSITION

Depress gas control knob slightly and turn clockwise

to “OFF” position.

Wait ﬁ ve (5) minutes to clear out any gas. If you then smell gas STOP! Follow WHAT TO DO IF YOU SMELL GAS. If you don’t smell gas, go to next step.

Turn gas control knob counterclockwise to “ON.”

Turn on all electric power to the appliance.

10.

Set thermostat to desired setting.

11.

After visually inspecting the ﬂ ame, replace lower front panel.

12.

If appliance will not operate after several tries, turn gas control knob to “OFF” and call your service technician or gas supplier.

OFF

• Do not try to light any appliance.

• Do not touch any electrical switches; 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 ﬁ re department.

To Turn Off Gas To The Appliance

Set the thermostat to lowest setting.

Turn off all electric power to the appliance if servicing is to be performed.

Depress gas control knob slightly and turn clockwise

to “OFF” position. Do not force.

CHECKING AND ADJUSTING

Gas Valve Safety Shutdown Test

WARNING

Figure 12 - Automatic Gas Valve

Electrical shock hazard. Follow instructions to turn off electric power. Failure to do so could result in death or serious injury.

Ignition system safety shutoff device must be tested after placing boiler in operation. With main burners ﬁ ring, disconnect ignition cable from intermittent pilot control box. Gas valve should shut off main burners. TURN OFF ELECTRIC POWER to boiler before reconnecting ignition cable, to prevent electric shock.

Adjust Pilot Burner

Remove screw cover over pilot adjusting screw.

Insert small screwdriver and adjust ﬂ ame as needed See

Figure 12 & 13

to increase ﬂ ame, clockwise to decrease.

Main Burner(S)

Main burners do not require primary air adjustment and are not equipped with primary air shutters.

Main burner ﬂ ames form sharp blue inner cones in softer blue outer mantel, with no yellow. Puffs of air from blowing on ﬂ ame or stamping on ﬂ oor will cause ﬂ ames to turn

orange momentarily. This is not unusual. Remain still when

observing main burner ﬂ ames. See If ﬂ ame appearance is not correct, check main burner oriﬁ ces, burner throat and ﬂ ame ports for dust and lint obstruction. It may be necessary to remove rollout shield to observe main burner ﬂ ames. Replace rollout shield after observation.

. Turn screw counterclockwise

Figure 14, Page 22

Figure 13 - Pilot Flame Adjustment

Adjust Limit Controls

Instructions for each control are included with the controls.

Recommended Boiler Water Temperatures

Settings can be changed after you have had some idea how

the system works. Example: If your system does not give

enough heat in very cold weather, you can raise limit setting to 190°F.

CHECKING AND ADJUSTING

Figure 14 - Main Burner Flame

Main burner ﬂ ame should form sharp blue inner mantel with no yellow.

Adjust Thermostat Heat Anticipator

Instruction for ﬁ nal adjustment of thermostat are packaged with thermostat.

Set Heat anticipator at .2.

Check thermostat operation. When set above temperature indicated on thermometer, boiler burners should ignite. Verify thermostat turns off boiler when room temperature reaches selected setting and starts boiler operating when room temperature falls few degrees. After setting limit control to desired setting, check to see if it shuts off gas supply to burners.

Turn your thermostat up to call for heat and let your boiler run until temperature of water reaches limit setting. Gas valve shuts off and circulator keeps running until thermostat is satisﬁ ed, or water cools enough to restart burners through limit control.

To check operation of contacts in pressure switch, disconnect rubber tubing (located between blower and pressure switch) from pressure switch, while boiler is operating. Burners extinguish and blower keeps running. When tubing is reconnected to pressure switch, ignition sequence begins, resulting in ignition of main burners.

Set thermostat for desired temperature.

Safe lighting and other performance criteria were met with gas manifold and control assembly provided on boiler when boiler underwent tests speciﬁ ed in ANSI Z21.13.

MAINTAINING YOUR BOILER

Burners

Beginning of heating season visually check pilot and main burner ﬂ ames. See

Safety Relief Valve

Test safety relief valve for proper operation. Refer to valve manufacturer’s instructions packaged with relief valve.

Expansion Tank (Non-diaphragm)

Tank may become waterlogged, or may receive excess of air. Frequent automatic opening of safety relief valve indicates water logging. High boiler temperature accompanied by unusually low radiation unit temperature (and “knocking”) indicates excess air in tank.

To correct:

Close valve between boiler and tank. Drain tank until empty.

Check all tank plugs and ﬁ ttings. Tighten as necessary.

Open valve between boiler and tank. Water will rise to normal height in tank if you have automatic ﬁ ll valve (otherwise, manually reﬁ ll system).

Boiler Flue Passages

Recommend following checked annually by qualiﬁ ed service agent.

• ﬂ ue passages

• burner adjustment

• operation of controls

Before start of each season (or whenever system has been shut down for some time) recheck whole system for leaks and recheck boiler and vent pipe for leaks. Replace or patch any boiler seals that are faulty. Before start of each season (or whenever system has been shut down for some time) recheck the whole system for leaks . . . and recheck the boiler and vent pipe for leaks. Replace or patch any boiler seals that are faulty.

Figures 13, and 14

Cleaning Your Boiler And Burners

Flue passages between sections should be examined yearly and cleaned if necessary.

To clean:

• Remove burners, pilot, and vent pipe.

• Remove top and front jacket panels.

• Remove two screws attaching intermediate front panel to left and right side jacket panels.

• Remove control panel.

• Remove draft diverter and intermediate front panel.

• Carefully remove cerafelt gasket strips.

• Clean passageways between sections with ﬂ exible handle wire brush. Remove dirt from bottom of boiler and from between sections by vacuuming.

• Verify all ﬂ ame ports in burners are open and clear. Shake out or blow out all loose dirt in burners.

• Reseal seams between adjacent sections as necessary with 400

• Reassemble all parts.

• Verify tightness of pilot connections and condition of burner ﬂ ames after reassembly. See Figures 13 and 14.

• Verify vent pipe connections to chimney are secure and no obstructions are present.

Blower Blower motor features permanently lubricated ball bearing

construction. Lubrication is not required.

Circulator Pump Isolation Valves

Operate isolation valves in circulator pump ﬂ anges manually once or twice per year to prevent valves from becoming stuck in open position

Rotate valves from open position to closed position and back to open position.

F RTV silicone sealant.

Vent Pipe

Venting and piping should be checked at least monthly. If vent piping shows any sign of leaking, replace immediately.

Water System

If system is to remain out of service during freezing weather, always drain it completely (water left in to freeze will crack pipes and/or boiler).

Low Water Cutoff(s)

Inspect ﬁ eld sourced low water cutoffs annually or as recommended by low water cutoff manufacturer. Flush ﬂ oat type low water cutoff(s) per manufacturer’s instructions.

Housekeeping

• Keep boiler area clear and free from combustible materials, gasoline and other ﬂ ammable vapors and liquids.

• Keep boiler area clear of debris and other materials obstructing ﬂ ow of combustion and ventilation air.

SERVICE HINTS

You may avoid inconvenience and service calls by checking these points before you call for service:

CAUTION

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 ﬁ re department.

IF YOUR SYSTEM IS NOT HEATING OR NOT GIVING ENOUGH HEAT . . .

POSSIBLE CAUSE WHAT TO DO

Thermostat is not set correctly Reset thermostat

Check ﬂ ame. If it is yellow, the burner is not getting enough air. Or, if

Burner is not operating properly

ﬂ ame is blue and noisy and seems to lift off the burner, the burner is getting too much air. Contact your service agency.

No electric power to boiler

Controls out of adjustment Reset according to instructions.

Radiators not heating

Circulating pump not running Check over-current protection. Check relay operation.

Poor electrical contact Check all control terminals and wire joints.

Chimney ﬂ ue is blocked

Rollout switch blown

Check over-current protection. Check to be sure electric power supply circuit is “ON”.

Open radiator vents to excess air. Check ﬂ ow control valve (if used). It may be in closed position.

Pressure switch will not close and pilot spark will not operate to start pilot. Have your service technician check and correct, if necessary.

Have your service technician check heat exchanger for blockage. Replace rollout switch with exact replacement.

IF BURNER IS NOISY . . .

POSSIBLE CAUSE WHAT TO DO

Gas input amount is incorrect Contact your service technician.

RELIEF VALVE LEAKING . . .

POSSIBLE CAUSE WHAT TO DO

Dirt on seat Open valve manually. Allow water to run and clear valve seat.

Water logged expansion tank Drain tank, see manufacurer instructions.

HAVE YOUR SERVICE AGENCY CHECK ANY PROBLEM YOU

ARE UNABLE TO CORRECT.

EQUIPMENT & OPTIONAL ACCESSORIES

WARNING

Burn and scald hazard. Safety relief valve could discharge steam or hot water during operation.

AIR ELIMINATING FITTING (AIR PURGER)

Air purger is used to remove excess air from system. It is installed in supply line. It will eliminate air from water before it reaches radiators and bleed off this air.

Install discharge piping per these instructions.

SAFETY RELIEF VALVE

Safety relief valve is required on your boiler. Water expands as it is heated. If there is no place for water to expand into, water pressure will build up inside boiler and system. Should this happen, safety relief valve will automatically open at predetermined pressure. This will relieve the strain on boiler and system. Run pipe from relief valve outlet (pipe must be same size as outlet and open end must not be threaded) to open drain, tub or sink, or other suitable drainage point not subject to freezing. Failure to do so may cause water damage or injury should safety relief valve release.

EXPANSION TANK

Expanding water ﬂ ows into expansion tank. Tank should be correct size. Tank is ﬁ lled with air. As water expands it compresses air in the tank to form air pressure cushion. This “spring-like” cushion serves to maintain correct operating water pressure regardless of water temperature. This assures “full measure” of water, even in highest radiation unit of system. It also prevents blowing off of safety relief valve. Air in tank in beginning (with system ﬁ lled with cold water) is sufﬁ cient for proper operation. Tank also serves as trap for excess air in system. Air would cause gurgling in pipes and in efﬁ cient circulation in radiators if left in system.

It is possible for tank to become “waterlogged” (ﬁ lled with water). It can also become overﬁ lled with air. This can happen after ﬁ lling system with new water. Fittings provided on tank and in line to tank are for bleeding off excess water or air.

When installing this tank, it is important:

Tank be higher than boiler top.

Pipe to tank continuously rises up to tank (so air can “bubble” up to it).

DIAPHRAGM TYPE EXPANSION TANK

Diaphragm type expansion tank takes place of conventional expansion tank. Carefully read instructions packed with your tank assembly.

Tank comes with 10-12 pounds per square inch air charge. This is the same as pressure produced in system by automatic ﬁ ll valve. When system is ﬁ rst ﬁ lled, tank will contain little or no water.

As water is heated its pressure increases. It expands into tank, compressing air in tank. Compressed air cushion permits water in system to expand as temperature changes. Diaphragm type tank can be mounted on air purger ﬁ tting or at any convenient place in supply or return line.

MAIN AIR VENT FOR DOWN FLOW SYSTEMS OR DIAPHRAGM TYPE EXPANSION TANK

Before system is ﬁ lled with water, there is air in pipes and radiation units. Some of it will be trapped as system is ﬁ lled . It is possible to eliminate most of this air through air vent on radiation units. Main air vent will speed and simplify this. Install on highest point in supply main when all radiation is below top of boiler.

AUTOMATIC FILL VALVE

For a safe, efﬁ cient operation, hot water system must be completely ﬁ lled with water. Adding new water, when needed can be done manually (by use of hand valve in water supply line). Requires regular attention to system’s needs. Automatic ﬁ ll valve accomplishes this without attention. Install in supply line on hot water boilers only. Valve operates through water pressure differentials. It does not require electrical connection.

DRAIN VALVE

Manual valve provides means of draining all water from boiler and system. It is often installed in 3/4” tapping at bottom of end boiler section. Or it can be installed in tee where return line enters boiler.

WATER TEMPERATURE CONTROL

Water temperature limit control in relay is adjustable and may be set as necessary. It may be set as low as

140°F, or as high as 220°F. This depends on type and amount of radiation involved and weather conditions.

CIRCULATING PUMP

Every forced hot-water system requires circulating pump. Separate pump or zone valve is required for each zone, if you have a two or more zone system. Pump must have capacity to provide circulation required by your system. Pump is connected into main just ahead of boiler. It is also wired to electrical system.

BLOWER (Draft Inducer)

Blower provides means for pulling air through boiler and exhausting ﬂ ue gasses into vent system. Blower shuts off when burners are not ﬁ ring. This keeps heat in house rather than having it go up chimney.

EQUIPMENT & OPTIONAL ACCESSORIES

PRESSURE SWITCH

Air pressure switch works on negative pressure. When blower comes on air pressure switch operates intermittent pilot and gas valve. Air pressure switch is factory set and will only work when blower operates properly. It will not allow boiler to come on if blower does not generate enough pressure or if venting system is blocked.

Factory Pressure Switch Set point:

-0.4” wc. for 2-5 section boilers.

-0.5” w.c. for 6-7 section boilers.

ROLLOUT SWITCH (FLAME ROLLOUT SAFETY SHUTOFF)

Rollout switch is temperature-sensitive fuse link device. Located on boiler base just outside ﬁ re box. In event of heat exchanger ﬂ ueway blockage causing ﬂ ame to roll out of ﬁ re box, fuse does not change in appearance when blown.

If rollout switch blows, it must be replaced with exact replacement. Check heat exchanger ﬂ ueways for blockage when restoring system to operating condition. DO NOT operate system without rollout switch.

APPENDIX A - CONTROL MODULE

A.1 Installation Environment Considerations

WARNING

If you do not follow these instructions exactly, a ﬁ re or explosion may result causing property damage, personal injury or loss of life.

• Do not use this appliance if any part has been under water. Immediately call a qualiﬁ ed

service technician to inspect appliance and to replace any part of control system and any gas control which has been under water.

• Do not allow water to drip on controls. Prevent condensation by allowing air circulation around module and gas control.

• Do not use corrosive chemicals around or on module or gas control.

• Install plastic cover.

• Controls can be damaged by excessively high

temperatures. Verify adequate air circulation around louvers is maintained when installing boiler.

A.2 Electrical Connections Connect Module Connectors Figure 10, Page 18

• L1& L2 leads inside J box using wire nuts. Secure J

box cover.

A.3 Adjusting Settings

To discourage unauthorized changing of settings, procedure to enter adjustment mode is required.

To enter adjustment mode, press UP, DOWN, and I buttons (see Figure 1) simultaneously for three seconds. Press and release I button until parameter requiring adjustment is

displayed:

о “SP_” Setpoint (180 °F default setting; adjustable

between 130 and 220 °F)

о “Df_” Setpoint Differential (15 °F default setting;

adjustable between 10 and 30 °F)

о “°F_” Degrees Fahrenheit

Press UP or DOWN button until parameter has reached desired value. After 60 seconds without any button inputs,

control automatically returns to READ mode.

A.4 Display

In RUN mode, status items and parameters are viewable.

Example, to display setpoint, control ﬂ ashes “sp” (setpoint)

followed by temperature (i.e., 135), followed by °F or °C. To read settings, press and release I key to ﬁ nd parameter

of interest.

Example, press and release I until setpoint (sp) is

displayed, followed by three-digit number, i.e., 190, followed by °F or °C. Press I button again will display (S1T) Sensor 1 Temperature followed by three-digit number and corresponding degree designator.

See Display Readout.

• Circulator harness to circulator. Harness comes

plugged into module with Molex® plug.

• Thermostat connection to yellow wires marked TT

using wire nuts.

• Ensure remaining Molex® plug connectors have not

worked loose during transit.

• Check sensing bulb is fully inserted in well and is not

loose.

Figure 15 - Display Readout

APPENDIX A - CONTROL MODULE

A.5 Operation

Module continuously monitors boiler water temperature and ﬁ res or shuts off burner based on this temperature data.

When “Call for Heat” occurs, control enables circulator and monitors boiler water temperature to determine whether thermostat can be satisﬁ ed without ﬁ ring burners.

Table 1 - Operation State Codes

State

Code

Number

Idle Standby - no call for heat

Circulator

Wait for pressure switch to open

Wait for pressure switch to close

Pre-purge System is purging before ignition trial; includes Pilot Valve circuit diagnostics.

Spark System sparking. Flame is not present

Flame stabilization

Running System is running. Flame signal must be present.

Post-Purge System is purging at end of call for heat

Retry delay Successful ignition was not detected, and delay is called before retry.

Recycle delay Flame signal was lost, and delay is called before retry

Wait for pressure switch to open - failed to close

Wait for pressure switch to close - failed to open

Soft lock-out Soft lockout duration is one hour, may override with manual reset.

Hard lock-out Manual reset is required for hard lockout

Wait for limit to close Possible thermostat call for heat; limit switch is open.

Flame out of sequence

Pilot valve diagnostics Pilot valve circuitry diagnostics during pre-purge.

Current leakage detection

Wait for recovery

Deﬁ nition Explanation

Heat request present. Boiler temperature sufﬁ ciently high to run circulator pump only.

Inducer is off. Control waits for pressure switch to open. Checked at beginning of heat cycle before turning on inducer. If pressure switch does not open in 60 seconds, control goes to State 11.

Inducer is turned on. Control waits for pressure switch to close. Checked at beginning of heat cycle after turning on inducer. If pressure switch does not close in 60 seconds, control goes to State 12

Flame signal is being established. Variation in signal is allowed during this state, ﬂ ame must be stable at end of period

Inducer is still off. Pressure switch has not opened at beginning of heat cycle. Alarm is sent, but no lockout occurs

Inducer is on. Pressure switch has not closed at beginning of heat cycle. Alarm message is sent but no lockout occurs.

Flame signal sensed before trial for ignition. Appropriate alarm is sent. OR

Flame signal sensed during post purge. Appropriate alarm is sent. OR

Flame signal present when not expected. Appropriate alarm is sent.

Self check performed at start up, again at beginning of heat cycle, and during “Wait for Recovery “ State.

Self check performed at start up, again at beginning of heat cycle, and during “Wait for Recovery “ State

Control determines burner operation is required, module proceeds to start burner (see state codes list) and heats water in boiler until setpoint temperature is achieved or thermostat is satisﬁ ed. .

Burner is de-activated, ignition module completes heating cycle, returns to idle and waits for temperature to drop again.

Circulator is turned on throughout “Call for Heat.”

APPENDIX A - CONTROL MODULE

A.6 Boiler High Limit Temperature Controller

• When water temperature reaches setpoint, controller ends heating cycle.

• When water temperature drops below setpoint minus differential, controller restarts heat cycle to re-heat boiler water.

• If water temperature exceeds maximum allowed temperature (220°F or 104°C), controller enters manual reset lockout state.

• For models having reset capability, press any onboard button or cycle power to reset.

Figure 16 - Basic Control Algorithm Example

A.7 Troubleshooting

• Following service procedures are provided as general guide.

• On lockout and retry models, meter readings between gas control and ignition module must be taken within trial for ignition period. Once ignition module shuts off, lockout models must be reset through key buttons and display. On retry models, wait for retry or reset at thermostat.

• Check for correct installation and wiring before replacing any component.

• Control module cannot be repaired. If it malfunctions, it must be replaced.

• Use only qualiﬁ ed service agent to service ignition systems.

Perform checkout as ﬁ rst step in troubleshooting.

Check troubleshooting guide to pinpoint cause of problem. See Table 2, page 30.

If troubleshooting indicates ignition problem, see Ignition System Checks to isolate and correct the problem.

Perform checkout procedure following troubleshooting guide again to verify system is operating normally.

A.8 Troubleshooting Error Codes

Integrated boiler control uses advanced diagnostic capability to assist in troubleshooting error conditions.

Table 2 shows codes that could arise on integrated display during fault.

Suggestions are provided in Table 8 for servicing these potential errors.

APPENDIX A - CONTROL MODULE

Table 2 - Troubleshooting Error Codes

Error Code

Number

4 Flame current too low. Check for ﬂ ame. Non critical alarm

18 Gas valve relays welded. Five consecutive soft lockouts. Hard lockout

24 Flame sensed during postpurge (after gas valve signaled closed). Soft lockout

58 Igniter ﬂ ame rod shorted to burner ground. Repair or replace igniter. Wait for recovery

59 Line Voltage error - voltage out of speciﬁ cation high or low (15-37V (44-66Hz)) Wait for recovery

63 Soft lockout: maximum number of recycles exceeded. Soft lockout

64 Soft Lockout - electronics failure. On-board self diagnostics detected error. Soft lockout

Note: Soft lockout time is 1 hour or manual reset. Hard lockout requires manual reset.

Pressure switch failed to open (stuck closed).

Flame sensed out of normal sequence (before opening or after closing gas valve).

Flame sensed during prepurge ( before gas valve signaled opened).

Pressure switch failed to close (Contacts stuck open)

Sensor 1 error. Temperature sensor in well is not reading correctly. Verify it is connected to board. Replace if necessary.

Igniter ﬂ ame rod shorted to burner ground

Applies only to thermostats having on-board transformer. Polarity is wrong in this case.

Thermostat input higher than threshold.

Line voltage unstable - possibly too may heavy loads switching on and off causing erratic supply voltage.

Soft lockout: maximum number of retries exceeded.

Soft lockout is reset after one hour if alarm reason disappears.

Over temperature error. Sensor measured temperature in excess of maximum allowable limit.

Deﬁ nition Consequence

Wait for recovery

Soft lockout

Wait for recovery

Soft lockout

A.9 Intermittent Pilot

Ignition System Checks

STEP 1: Check ignition cable.

• Verify ignition cable does not run in contact with metal surfaces.

• Verify only factory supplied Ignition cable (or approved replacement) is used.

• Verify connections to ignition module and igniter or igniter-sensor are clean and tight.

• Verify ignition cable provides good electrical continuity.

STEP 2:

Verify ignition system grounding. Nuisance shutdowns are often caused poor or erratic grounding.

Common ground is required for module and pilot burner/ igniter sensor.

— Check for good metal-to-metal contact between pilot burner bracket and the main burner. — Check ground lead from GND (BURNER) terminal

on module to pilot burner. Verify connections are clean and tight. If wire is damaged or deteriorated, replace with No. 14-18 gauge, moisture-resistant, thermoplastic insulated wire with 105°C [221°F] minimum rating.

— Check ceramic ﬂ ame rod insulator for cracks or

evidence of exposure to extreme heat, which can permit leakage to ground. Replace pilot burner/igniter sensor and provide shield if necessary.

— If ﬂ ame rod or bracket is bent out of position, restore

to correct position.

APPENDIX A - CONTROL MODULE

STEP 3: Check spark ignition circuit. Disconnect ignition cable at SPARK terminal on module.

WARNING

Electrical shock hazard. Ignition circuit generates over 10,000 volts. Turn OFF electrical power supply at service panel before making electrical connections. Failure to do so could result in death or serious injury.

Energize module and listen for audible sparking noise. When operating normally, there should be buzzing noise turns on and off twice per second for duration of 1–7 seconds, depending on model.

STEP 4: Verify pilot and main burner lightoff.

• Initiate call for heat. Turn thermostat above room temperature. Ignition sequence may be delayed by thermal purge until boiler water temperature is below 140°F (60°C)

• Watch pilot burner during ignition sequence.

— Verify ignition spark continues after pilot is lit. — Verify pilot lights and spark stops, verify main

burner does not light.

• If so, ensure adequate ﬂ ame current as follows.

• Recheck ignition sequence as follows.

— Reconnect main valve wire. — Adjust thermostat above room temperature. — Verify ignition sequence at burner. — If spark does not stop after pilot lights, replace

module.

— If main burner does not light or if main burner lights

and system locks out, check module, ground wire and gas control as described in troubleshooting Error Codes. See Table 2 page 30.

Figure 17 - Pilot Flame

— Turn off boiler at circuit breaker or fuse box. — Clean ﬂ ame rod with emery cloth. — Verify electrical connections are clean and tight.

Replace damaged wire..

— Check for cracked ceramic insulator, which can

cause short to ground, and replace igniter-sensor if necessary.

— At gas valve, disconnect main valve wire from MV

terminal.

— Turn on power and set thermostat to call for heat. Pilot

should light, main burner will remain off because main valve actuator is disconnected.

— Check pilot ﬂ ame. Verify it is blue, steady and

envelops 3/8 to 1/2 in. [10 to 13 mm] of ﬂ ame rod. Figure 17 for possible ﬂ ame problems and causes.

— If necessary, adjust pilot ﬂ ame by turning pilot

adjustment screw on gas control clockwise to decrease or counterclockwise to increase pilot ﬂ ame. Following adjustment, always replace pilot adjustment cover screw and tighten ﬁ rmly to assure proper gas control operation. Figure 12, Page 21.

— Set temperature below room set-point to end call for

heat.

Correct Pilot Flame: 3/8 to 1/2 inch in ﬂ ame. See Figure 13, Page 21.

PRODUCT LITERATURE

Lennox Industries Inc.

Dallas, Texas

Manufacturedby:

ECRInternational,Inc.

2201 Dwyer Avenue, Utica NY 13501

web site: www.ecrinternational.com

Lennox GWB8-042IE-2, GWB8-075IE-2, GWB8-112IE-2, GWB8-150IE-2, GWB8-187IE-2 Installation Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual