Lochinvar KNIGHT 399, 999 - 750 User Manual

INSTALLATION AND SERVICE MANUAL

Save this manual for future reference.



WARNING: 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 or use 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 electric switch; do not use any phone in your building.

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

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

– Installation and service must be performed by a qualified installer, service agency or the gas supplier.

 WARNING: Do not use

this appliance if any part has been under water. The possible damage to a flooded appliance can be extensive and present numerous safety hazards. Any appliance that has been under water must be replaced.

HYDRONIC HEATING BOILERS and

DOMESTIC WATER HEATERS

399,999 - 2,070,000 Btu/hr MODELS

CF-CH(E)-i&s-08



WARNING: Improper

installation, adjustment, alteration, service or maintenance can cause property damage, personal injury, exposure to hazardous materials or loss of life. Refer to this manual. Installation and service must be performed by a qualified installer, service agency or the gas supplier. This unit contains materials that have been identified as carcinogenic, or possibly carcinogenic, to humans.

Hydronic Heating Boilers and Domestic Water Heaters

Table of Contents

General Product Information . . . . . . . . . . . . . . . . . . . . . . . . .3

Special Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Product Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Locating Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Clearances from Combustible Construction . . . . . . . . . .6

Base for Combustible Floors . . . . . . . . . . . . . . . . . . . . .7

Freeze Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Pump Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Hydronic System Antifreeze . . . . . . . . . . . . . . . . . . . . . .7

Outdoor Boiler Installation . . . . . . . . . . . . . . . . . . . . . . .7

Shutdown and Draining . . . . . . . . . . . . . . . . . . . . . . . . .8

Freeze Protection for a Heating Boiler System . . . . . . . . . . .8

Combustion and Ventilation Air . . . . . . . . . . . . . . . . . . .8

Combustion Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Combustion Air Options . . . . . . . . . . . . . . . . . . . . . . . . .9

Exhaust Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Venting Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Vertical Vent Termination Clearances and Location . .11

Sidewall Vent Termination Clearances and Location . .12

Combustion Air Inlet Piping . . . . . . . . . . . . . . . . . . . . .13

Combined Air Inlet Points . . . . . . . . . . . . . . . . . . . . . .15

Vent System Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Barometric Damper Location . . . . . . . . . . . . . . . . . . . .15

1. Conventional Negative Draft Venting . . . . . . . . . . .16

2. Vertical DirectAire

™

Venting . . . . . . . . . . . . . . . . . . .17

3. Sidewall Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

4. Horizontal DirectAire

™

Venting . . . . . . . . . . . . . . . .21

5. Direct Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

6. Outdoor Installation Venting . . . . . . . . . . . . . . . . . .26

Connecting to Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . .28

Gas Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Connecting Gas Piping to Unit . . . . . . . . . . . . . . . . . . .28

Gas Train and Controls . . . . . . . . . . . . . . . . . . . . . . . . .29

Combination Gas Valves . . . . . . . . . . . . . . . . . . . . . . .30

Venting of Combination Gas Valves . . . . . . . . . . . . . .30

Checking Gas Supply Pressure . . . . . . . . . . . . . . . . . . .30

Gas Manifold Pressure Adjustment . . . . . . . . . . . . . . .31

Connecting to Water Supply . . . . . . . . . . . . . . . . . . . . . . . .32

Inlet and Outlet Connections . . . . . . . . . . . . . . . . . . . .32

Relief Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Water Flow Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Low Water Cutoff . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Connecting to Electrical Supply . . . . . . . . . . . . . . . . . . . . .33

Boiler System Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Primary/Secondary Boiler Piping . . . . . . . . . . . . . . . . .35

Table of Contents

Low Temperature Return Water Systems . . . . . . . . . . .36

Radiant Floor and Snow Melt Heating Systems . . . . . .37

Boiler Flow Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Boiler Bypass Requirements . . . . . . . . . . . . . . . . . . . . .38

Temperature/Pressure Gauge . . . . . . . . . . . . . . . . . . . . .38

Placing the Boiler in Operation . . . . . . . . . . . . . . . . . . .38

Installation with a Chilled Water System . . . . . . . . . . .39

Boiler Operating Temperature Control . . . . . . . . . . . . .39

Water Treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Terminal Strip Connection Options . . . . . . . . . . . . . . .40

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Lighting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . .42

To Turn Off Gas To Appliance . . . . . . . . . . . . . . . . . . .43

Programming Temperature Control . . . . . . . . . . . . . . .43

Quick Programming Overview . . . . . . . . . . . . . . . . . . .43

Adjust Menu Setting Descriptions . . . . . . . . . . . . . . . .44

Access Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Placement of Sensors . . . . . . . . . . . . . . . . . . . . . . . . . .46

Staging Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Hot Surface Ignition System . . . . . . . . . . . . . . . . . . . . . . . .49

Operation and Diagnostic Lights . . . . . . . . . . . . . . . . . . . . .51

Domestic Water Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Water Velocity Control . . . . . . . . . . . . . . . . . . . . . . . . .52

Water Chemistry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Pipe Size Requirements . . . . . . . . . . . . . . . . . . . . . . . .53

Circulating Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Minimum Pump Performance . . . . . . . . . . . . . . . . . . . .54

Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Potable Hot Water Temperature Control Settings . . . . .54

Location of Cold Water Supply Piping Connections . .55

High Water Temperature Limit Control . . . . . . . . . . . .55

Optional Relief Valve . . . . . . . . . . . . . . . . . . . . . . . . . .55

Thermal Expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Cathodic Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Cleaning and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . .56

Combustion and Ventilation Air . . . . . . . . . . . . . . . . . .57

Adjusting Differential Air Pressure . . . . . . . . . . . . . . . .58

Servicing Hot Surface Igniter and Ignition Module . . .59

Ignition System Checkout . . . . . . . . . . . . . . . . . . . . . . .59

Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Troubleshooting Guide

399,999 - 750,000 Btu/hr Models . . . . . . .62

Troubleshooting Guide 990,000 - 2,070,000 Btu/hr Models . . . . . .63

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Installation and

Service Manual

GENERAL PRODUCT INFORMATION

Special Instructions

This manual supplies information for the installation, operation and servicing of the appliance. Read and understand this manual completely before installing unit.

Installation and service must be performed by a qualified service installer, service agency, or the gas supplier.

Unpacking

Upon receiving equipment, check for signs of shipping damage. Pay particular attention to parts accompanying the boiler which may show signs of being hit or otherwise being mishandled. Verify total number of pieces shown on packing slip with those actually received. In case there is damage or a shortage, immediately notify the carrier.

Codes

The equipment shall be installed in accordance with those installation regulations in force in the local area where the installation is to be made. These shall be carefully followed in all cases. Authorities having jurisdiction shall be consulted before installations are made. In the absence of such requirements, the installation shall conform to the latest edition of the National Fuel Gas Code, ANSI Z223.1 and/or CAN/CGA-B149 Installation Code. Where required by the authority having jurisdiction, the installation must conform to American Society of Mechanical Engineers Safety Code for Controls and Safety Devices for Automatically Fired Boilers, ASME CSD-1. All boilers conform to the latest edition of the ASME Boiler and Pressure Vessel Code, Section IV.

Note: The ceramic fiber material used in this appliance is an irritant; when handling or replacing the ceramic materials it is advisable that the installer follow these safety guides.

REMOVAL OF COMBUSTION CHAMBER LINING OR BASE PANELS:

• Avoid breathing dust and contact with skin and eyes.

• Use NIOSH certified dust respirator (N95) (http://www.cdc.gov/niosh/hompage.html).

• Lightly mist with water (only those areas being handled) the combustion chamber lining or base insulation to prevent airborne fibers.

• Remove combustion chamber lining or base insulation from the boiler and place it in a plastic bag for disposal.

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

• NIOSH stated First Aid:

Eye: Irrigate immediately. Breathing: Fresh air.

Warranty

Factory warranty (shipped with unit) does not apply to units installed or operated improperly.

Improper installation or system design causes most operating problems.

1. Excessive water hardness causing a lime build up in the

copper tube is not the fault of the equipment and is not covered under the appliance manufacturer’s warranty (see Water Treatment, page 40 and Water Chemistry, page 52.)

2. Excessive pitting and erosion on the inside of the copper

tube may be caused by too much water velocity through the tubes and is not covered by the appliance manufacturer’s warranty (see System Temperature Rise Chart on page 37 for flow requirements).

 WARNING: The combustion chamber

lining in this appliance contains ceramic fiber materials. Ceramic fibers can transform into cristobalite (crystalline silica) when exposed to temperatures above 2192°F (1200°C) dependent upon the length of exposure time.*

The International Agency for Research on Cancer (I.A.R.C.) has concluded, "Crystalline silica inhaled in the form of quartz or cristobalite from occupational sources is carcinogenic to humans."**

Testing has confirmed that the ceramic fibers in this application do not reach 2192°F (1200°C).

*Reference Dyson, D., Butler, M., Hughes, R., Fisher, R., and Hicks, G. The Devitrification of Alumino-silicate Ceramic Fiber Materials - The Kinetics of the Formation of Different Crystalline Phases, Ann. Occup. Hyg. Vol. 41, No. 55, 1997. **Reference I.A.R.C. Monograph 68, June 1997.

Hydronic Heating Boilers and Domestic Water Heaters

SAFETY INFORMATION

The information contained in this manual is intended for use by qualified professional installers, service technicians or gas suppliers. Consult your local expert for proper installation or

service procedures.

1. This unit is only for use with the type of gas indicated on the rating plate.

2. If you smell gas

• shut off gas supply

• 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 fire

department

3. Boilers and water heaters are heat producing appliances. To avoid damage or injury, do not store materials against the appliance or the vent-air intake system. Use proper care to avoid unnecessary contact (especially children) with the appliance and vent-air intake components.

4. Never cover your unit, lean anything against it, store trash or debris near it, stand on it or in any way block the flow of fresh air to your unit.

5. UNDER NO CIRCUMSTANCES MUST

FLAMMABLE MATERIALS SUCH AS GASOLINE OR PAINT THINNER BE USED OR STORED IN THE VICINITY OF THIS APPLIANCE, VENT-AIR INTAKE SYSTEM OR ANY LOCATION FROM WHICH FUMES COULD REACH THE APPLIANCE OR VENT-AIR INTAKE SYSTEM.

6. Appliance surfaces become hot during operation. Be careful not to touch hot surfaces. Keep all adults, children, and animals away from operation of the hot unit. Severe burns can occur.

7. You must take adequate care to prevent scald injury when storing water at elevated temperatures for domestic use.

8. This unit must have an adequate supply of fresh air during operation for proper gas combustion and venting.

9. Make sure all exhaust venting is properly installed and maintained. Improper venting of this unit could lead to increased levels of carbon monoxide.

10. Do not use this boiler if any part has been under water. Immediately call a qualified service technician to replace the boiler. The possible damage to a flooded boiler can be extensive and present numerous safety hazards. Any appliance that has been under water must be replaced.

11. Do not alter this unit in any way. Any change to this unit or its controls can be dangerous.

 WARNING: To minimize the possibility

of serious personal injury, fire or damage to your unit, never violate the following safety rules.

 WARNING: Should overheating occur or

the gas supply fail to shut off, do not turn off or disconnect the electrical supply to the pump. Instead, shut off the gas supply at a location external to the unit.

IMPORTANT: Read this owner’s manual carefully and completely before trying to install, operate, or service this unit. Improper use of this unit can cause serious injury or death from burns, fire, explosion, electrical shock, and carbon monoxide poisoning.



DANGER: Carbon Monoxide poisoning

may lead to death!

IMPORTANT: Consult and follow local building and fire regulations and other safety codes that apply to this installation. Consult your local gas utility company to authorize and inspect all gas and flue connections.

Installation and

Service Manual

PRODUCT IDENTIFICATION

FIG. 1 Front and Rear View

Rear View

Front View

Hydronic Heating Boilers and Domestic Water Heaters

INSTALLATION

This unit meets the safe lighting performance criteria with the gas manifold and control assembly provided, as specified in the ANSI standards for gas-fired units, ANSI Z21.13/CSA 4.9 and ANSI Z21.10.3/CSA 4.3.

LOCATING UNIT

1. Maintain all clearances from combustible construction when locating unit. See Clearances from Combustible Construction, this page.

2. Locate the unit so that if water connections should leak, water damage will not occur. When such locations cannot be avoided, install a suitable drain pan that is well-drained under the unit. The pan must not restrict combustion air flow. The appliance manufacturer is not responsible for water damage in connection with this unit, or any of its components.

3. Install indoor units so that the ignition system components are protected from any water while operating or during service.

4. Appliances located in a residential garage and in adjacent spaces that open to the garage and are not part of the living space of a dwelling unit must be installed so that all burners and burner ignition devices have a minimum clearance of not less than 18" (46 cm) above the floor. The appliance must be located or protected so that it is not subject to physical damage by a moving vehicle.

5. DO NOT install this appliance in any location where gasoline or flammable vapors are likely to be present.

6. You must install unit on a level, non-combustible floor.

7. Do not install unit directly on carpet or other combustible material. A concrete-over-wood floor is not considered non-combustible. Maintain required clearances from combustible surfaces.

If installing unit in an area with a combustible floor, you must use a special combustible floor base. See Base for Combustible Floors, on page 7.

8. For outdoor models, you must install an optional vent cap. Instructions for mounting the vent cap are included in the venting section. Do not install outdoor models directly on the ground. You must install the outdoor unit on a concrete, brick, block, or other non-combustible pad. Outdoor models have additional special location and clearance requirements. See Outdoor Installation Venting, page 26. A wind proof cabinet protects the unit from weather.

Clearances from Combustible Construction

Maintain minimum specified clearances for adequate operation. Allow sufficient space for servicing pipe connections, pump and other auxiliary equipment, as well as the unit. See rating plate for specific service clearance requirements.

Right Side 3" (7.5 cm)

Rear 3" (7.5 cm) (3" min.

from any surface)

Left Side 6" (15cm) (24" (0.61m)

suggested for service)

Front Alcove* (30" (0.76m)

suggested for service)

To p 3" (7.5cm)

Flue 1" (25.4mm)

Hot Water Pipes 1" (25.4mm)

*An Alcove is a closet without a door.

Note: No additional clearance is needed on the right side of the unit for the observation port. An observation port is located on both the right and left side of the unit.

No additional clearances for combustibles are needed for use of the Direct Vent (DV) air inlet assembly.

FIG. 2 Clearances from Combustible Construction

3 INCH MINIMUM FROM UNIT TO WALL

Installation and

Service Manual

Base for Combustible Floors

There are no manufactured combustible floor base kits available for 990,000 - 2,070,000 Btu models. See Table-A below for floor base kits that are available.

You must construct a base for combustible floor installation. Install unit over a base of hollow clay tiles or concrete blocks from 8" to 12" thick and extending at least 24" beyond the unit sides. Place tiles or blocks so that the holes line up horizontally to provide a clear passage through the tiles or blocks. Place a 1/2" fireproof millboard over the top of the tile or block base. Place a 20-gauge sheet metal cover over the fireproof millboard. Center the unit on the base. Also follow this procedure if electrical conduit runs through the floor beneath the unit. This base must meet all local fire and safety codes.

FREEZE PROTECTION

Although these units are CSA International design certified for outdoor installations, such installations are not recommended in areas where the danger of freezing exists. You must provide proper freeze protection for outdoor installations, units installed in unheated mechanical rooms or where temperatures may drop to the freezing point or lower. If freeze protection is not provided for the system, a low ambient temperature alarm is recommended for the mechanical room. Damage to the unit by freezing is non-warrantable.

Anytime the temperature measured at any of the sensors (except the outside air temperature sensor) drops below 35°F (2°C), the control turns on the pump contact and the alarm relay. The screen displays an error message (EO2).

Pump Operation

This unit is equipped with a pump delay feature as standard. The delay is selectable through the temperature controller. As shipped from the factory, the ΔT

MIN is set to “OFF”, which

creates a 30 second pump delay at the end of a Call for Heat.

The value of ΔT

MIN can be changed to a value between 1°F

and 20°F. This will cause the unit to continue pump operation until the ΔT is less than the value selected (30 second minimum).

A value of “ON” is selectable through the control for ΔT

MIN.

This will operate the pump continuously. Alternatively, the pump can be powered by a separate circuit for continuous operation.

Note: Pump relay is rated for 1 HP maximum.

Location

Locate indoor boilers and hot water supply boilers in a room having a temperature safely above freezing [32°F (0°C)].

Hydronic System Antifreeze

Freeze protection for a heating boiler or hot water supply boiler using an indirect coil can be provided by using hydronic system antifreeze. Follow the appliance manufacturers instructions. Do not use undiluted or automotive type antifreeze.

Outdoor Boiler Installation

Adequate hydronic system antifreeze must be used. A snow screen should be installed to prevent snow and ice accumulation around the unit or its venting system.

 WARNING: Do not use antifreeze in

domestic water heater applications.

 CAUTION: A mechanical room

operating under a negative pressure may experience a down draft in the flue of a boiler which is not firing. The cold outside air pulled down the flue may freeze a heat exchanger. This condition must be corrected to provide adequate freeze protection.

399,999 CFK3301 500,000 CFK3302 650,000 CFK3303 750,000 CFK3304

TABLE - A

COMBUSTIBLE FLOOR KITS

Input Btu/hr Kit Number

Hydronic Heating Boilers and Domestic Water Heaters

INSTALLATION

Continued

Shut-Down and Draining

If for any reason, the unit is to be shut off, the following precautionary measures must be taken:

1. Shut off gas supply.

2. Shut off water supply.

3. Shut off electrical supply.

4. Drain the unit completely. Remove one threaded plug or bulbwell from the inlet side of the front header and one from the outlet side of the front header on the heat exchanger. Blow all water out of the heat exchanger (see FIG. 3).

5. Drain pump and piping.

FIG. 3 Draining Unit

Freeze Protection for a Heating Boiler System (if required)

1. Use only properly diluted inhibited glycol antifreeze designed for hydronic systems. Inhibited propylene glycol is recommended for systems where incidental contact with drinking water is possible.

2. A solution of 50% antifreeze will provide maximum protection of approximately -30°F (-34°C).

3. Follow the instructions from the antifreeze manufacturer. Quantity of antifreeze required based on total system volume including expansion tank volume.

4. Glycol is denser than water and changes the viscosity of the system. The addition of glycol will decrease heat transfer and increase frictional loss in the boiler and related piping. A larger pump with more capacity (15% to 25% more) may be required to maintain desired flow rates and prevent a noise problem in a glycol system.

5. Local codes may require a back flow preventer or actual disconnect from city water supply when antifreeze is added to the system.

COMBUSTION AND VENTILATION AIR

Provisions for combustion and ventilation air must be in accordance with Section 5.3, Air for Combustion and Ventilation, of the latest edition of the National Fuel Gas Code, ANSI Z223.1, in Canada, the latest edition of CAN/CGAB149 Installation Code for Gas Burning Appliances and Equipment, or applicable provisions of the local building codes.

Provide properly-sized openings to the equipment room to assure adequate combustion air and proper ventilation when the unit is installed with conventional venting or sidewall venting.

Combustion Air Filter

This unit has a standard air filter located at the combustion air inlet. This filter helps ensure clean air is used for the combustion process. Check this filter every month and replace when it becomes dirty. The filter size on the 399,999 - 750,000 units is 12" x 12" x 1" (30.5cm x 30.5cm x 2.5cm) and 16" x 16" x 1 (40.6cm x 40.6cm x 2.5 cm) on the 990,000 - 2,070,000 units. You can find these commercially available filters at any home center or HVAC supply store.

For convenience and flexibility, you can direct the combustion air inlet from either the back or right side of the unit. To arrange the combustion air inlet for side entry, follow the steps below:

1. Remove the metal panel from the unit’s side wall (see FIG. 4).

2. Remove screws from the air filter/bracket assembly.

3. Move the filter/bracket assembly from the rear of unit to the side opening (see FIG. 5).

4. Attach filter/bracket assembly to the unit’s side using the pre-drilled screw holes.

5. Attach the metal panel to the rear combustion air opening to seal it off.

 WARNING: Do not use undiluted or

automotive type antifreeze.

DRAIN PLUG

Installation and

Service Manual

FIG. 4 Metal Panel Covering Side Combustion Air Inlet

FIG. 5 Moving Air Filter/Bracket Assembly from Rear of Unit to Side

Combustion Air Options

This unit has four combustion air options.

1. Outside Combustion Air, No Ducts

You can direct outside combustion air to this unit using either one or two permanent openings.

One Opening

The opening must have a minimum free area of one square inch per 3000 Btu input (7cm

per kW). You must locate this

opening within 12" (30cm) of the top of the enclosure.

FIG. 6 Outside Combustion Air - Single Opening

Two Openings

The combustion air opening must have a minimum free area of one square inch per 4000 Btu/hr input (5.5cm

per kW). You must locate this opening within 12" (30cm) of the bottom of the enclosure.

The ventilation air opening must have a minimum free area of one square inch per 4000 Btu/hr input (5.5cm2per kW). You must locate this opening within 12" (30cm) of the top of the enclosure.

 CAUTION: Under no circumstances

should the mechanical room ever be under a negative pressure. Particular care should be taken where exhaust fans, attic fans, clothes dryers, compressors, air handling units, etc., may take away air from the unit.

Hydronic Heating Boilers and Domestic Water Heaters

INSTALLATION

Continued

FIG. 7 Outside Combustion Air - Two Openings

2. Outside Combustion Air, Using Ducts

You can direct outside combustion air to this unit using two air ducts to deliver the air to the boiler room.

Each of the two openings must have a minimum free area of one square inch per 2000 Btu input (11cm

per kW).

FIG. 8 Outside Combustion Air Through Ducts

3. Outside Combustion Air - Using Direct Venting

With this option, you can connect combustion air vent piping directly to the unit. See the information under Direct Venting

starting on page 22 for specific information regarding this option.

4. Combustion Air from Interior Space

You can direct combustion air to this unit using air from an adjoining interior space. You must provide two openings from the boiler room to the adjoining room.

Each of the two openings must have a net free area of one square inch per 1000 Btu input (22cm

per kW), but not less

than 100 square inches (645cm2).

FIG. 9 Combustion Air from Interior Space

All dimensions are based on net free area in square inches. Metal louvers or screens reduce the free area of a combustion air opening a minimum of approximately 25%. Check with louver manufacturers for exact net free area of louvers. Where two openings are provided, one must be within 12" (30 cm) of the ceiling and one must be within 12" (30 cm) of the floor of the mechanical room. Each opening must have a minimum net free area as specified in TABLE–C, page 14. Single openings shall be installed within 12" (30 cm) of the ceiling.

The combustion air supply must be completely free of any flammable vapors that may ignite or chemical fumes which may be corrosive to the unit. Common corrosive chemical fumes which must be avoided are fluorocarbons and other halogenated compounds, most commonly present as refrigerants or solvents, such as Freon, trichlorethylene, perchlorethylene, chlorine, etc. These chemicals, when burned form acids which quickly attack the heat exchanger finned tubes, headers, flue collectors, and the vent system. The result is improper combustion and a non-warrantable, premature unit failure.

Installation and

Service Manual

Exhaust Fans

Any fan or equipment which exhausts air from the boiler room may deplete the combustion air supply and/or cause a down draft in the venting system. Spillage of flue products from the venting system into an occupied living space can cause a very hazardous condition that must be immediately corrected. If a fan is used to supply combustion air to the boiler room, the installer must make sure that it does not cause drafts which could lead to nuisance operational problems with the boiler.

Vertical DirectAire™ and Horizontal DirectAire™ venting systems have specific requirements for combustion air ducts from the outside which are directly connected to the unit. See the requirements for combustion air duct in the venting section.

VENTING

General Information

You must supply adequate combustion and ventilation air to this unit. You must provide minimum clearances for the vent terminal from adjacent buildings, windows that open, and building openings. Follow all requirements set forth in the latest edition of the National Fuel Gas Code, ANSI Z223.1, in Canada, the latest edition of CAN/CGA Standard B149 Installation Code for Gas Burning Appliances and Equipment or applicable local building codes. Vent installations for connection to gas vents or chimneys must be in accordance with Part 7, “Venting of Equipment” of the above-mentioned standards.

Venting Support

Support horizontal portions of the venting system to prevent sagging. Provide an upward slope of at least 1/4 inch per foot (21mm/m) on all horizontal runs from the unit to the vertical flue run or to the vent terminal on sidewall venting installations.

Do not use an existing chimney as a raceway if another appliance or fireplace is vented through the chimney. The weight of the venting system must not rest on the unit. Provide adequate support of the venting system. Follow all local and applicable codes. Secure and seal all vent connections. Follow the installation instructions from the vent material manufacturer.

Vertical Vent Termination Clearances and Location

The vent terminal should be vertical and exhaust outside the building at least 2 feet (0.61m) above the highest point of the roof within a 10 foot (3.05m) radius of the termination.

The vertical termination must be a minimum of 3 feet (0.91m) above the point of exit.

A vertical termination less than 10 feet (3.05m) from a parapet wall must be a minimum of 2 feet (0.61m) higher than the parapet wall.

You must locate the air inlet termination elbow at least 12" (30cm) above the roof or above normal snow levels.

Keep the vent cap clear of snow, ice, leaves, and debris to avoid blocking the flue.

FIG. 10 Vent Termination from Peaked Roof - 10’ or Less From Ridge

10' OR LESS

RIDGE

CHIMNEY

3' MIN.

2' MIN.

IMPORTANT: Examine the venting system at least once each year. Check all joints and vent pipe connections for tightness. Also check for corrosion or deterioration. If you find any problems, correct them at once.

IMPORTANT: Vent terminations are not shown in Figures 10, 11, 12, and 13. Make sure all vertical vents are installed with vent terminations recommended by the vent manufacturer.

Hydronic Heating Boilers and Domestic Water Heaters

INSTALLATION

Continued

FIG. 11 Vent Termination from Peaked Roof More Than 10’ From Ridge

FIG. 12 Vent Termination from Flat Roof 10’ or Less from Parapet Wall

FIG. 13 Vent Termination from Flat Roof More Than 10’ from Parapet Wall

Sidewall Vent Termination Clearances and Location

Locate the bottom of the vent terminal at least 12 inches (30cm) above grade and above normal snow levels. Locate the bottom of the vent terminal at least 7 feet (2.13m) above grade when located adjacent to public walkways. Do not terminate directly above a public walkway.

Do not terminate the venting system in a window well, stairwell, alcove, courtyard, or other recessed area. Do not terminate the venting system below grade.

Locate vent termination at least 3 feet (0.91m) from an inside corner of an L-shaped structure.

Provide a minimum clearance of 4 feet (1.2m) horizontally from electric meters, gas meters, regulators, and relief equipment. Never locate vent cap above or below electric meters, gas meters, regulators, and relief equipment unless a 4 foot (1.2m) horizontal clearance is maintained.

Terminate the venting system at least 3 feet (0.9m) above any forced air inlet within 10 feet (3.05m).

Terminate the venting system at least 4 feet (1.2m) below, 4 feet (1.2m) beside, or 1 foot (30cm) above any door, window, or gravity air inlet into any building.

Locate vent termination at least 8 feet (2.4m) horizontally from any combustion air intake located above the sidewall termination cap.

TAB

 CAUTION: Units which are shut down or

will not operate may experience freezing due to convective air flow in flue pipe, through the air inlet, or from negative pressure in the mechanical room. In cold climates, operate pump continuously to help prevent freezing of boiler water. Provide proper freeze protection. See Freeze Protection, page 7.

MORE THAN 10'

RIDGE

2' MIN.

CHIMNEY

10'

3' MIN.

10' OR LESS

2' MIN.

3' MIN.

CHIMNEY

WALL OR

PARAPET

CHIMNEY

10' OR LESS

3' MIN.

NOTE: NO HEIGHT

ABOVE PARAPET

REQUIRED WHEN

DISTANCE FROM

WALLS OR PARAPET

IS MORE THAN 10'.

WALL OR

PARAPET

CHIMNEY

Installation and

Service Manual

Input Flue Air Inlet

Btu/hr Size Size*

399,999 6" 6"

500,000 6" 6"

650,000 8" 8"

750,000 8" 8"

990,000 10" 10"

1,260,000 12" 12"

1,440,000 12" 12"

1,800,000 14" 12"

2,070,000 14" 12"

* Minimum diameter for air inlet pipe. Installer may increase diameter one pipe size for ease of installation, if needed.

Combustion Air Inlet Piping

The sidewall or vertical rooftop DirectAire™ combustion air supply system has specific vent material and installation requirements. The air inlet pipe connects directly to the unit to supply combustion air. In most installations, the combustion air inlet pipe will be a dedicated system with one air inlet pipe per unit. You can combine multiple air inlets if the guidelines in Combined Air Inlet Points, page 15 are followed. The air inlet pipe will be connected to a combustion air inlet cap as specified in this section.

For normal installations, this system uses a single-wall pipe to supply combustion air from outdoors directly to the unit.

In cold climates, use a Type-B double-wall vent pipe or an insulated single-wall pipe for combustion air. This will help prevent moisture in the cool incoming air from condensing and leaking from the inlet pipe.

Length of Air Inlet Pipe

The installed length of air inlet pipe from the unit to the outside air inlet cap must not exceed 50 equivalent feet (15.2m). Subtract 5 feet (1.5m) of equivalent length for each 90° elbow. Subtract

2.5 feet (0.7m) of equivalent length for each 45° elbow.

Do not exceed the limits for the combustion air inlet piping lengths.

Sidewall Air Inlet

The sidewall air inlet cap is supplied in the Horizontal DirectAire™ Vent Kit. Order the kit from the appliance manufacturer. This sidewall cap supplies combustion air for a single unit only. See TABLE–D, page 19, for kit numbers.

Locate the unit as close as possible to the sidewall where you will install the combustion air supply system.

FIG. 14 Sidewall Combustion Air Inlet

TABLE - B

Flue and Air Inlet Pipe Sizes

 WARNING: Locate and install the

combustion air inlet cap correctly. Failure to do so can allow the discharge of flue products to be drawn into the combustion process. This can result in incomplete combustion and potentially hazardous levels of carbon monoxide in the flue products. This will cause operational problems and the spillage of flue products. Spillage of flue products can cause personal injury or death due to carbon monoxide poisoning.

Hydronic Heating Boilers and Domestic Water Heaters

INSTALLATION

Continued

FIG. 15 Air Inlet Cap for Sidewall Termination

To prevent recirculation of flue products from an adjacent vent cap into the combustion air inlet, follow all applicable clearance requirements in the latest edition of the National Fuel Gas Code and/or CAN/CGA-B149 Installation Code and instructions in the Installation and Service Manual.

You must install the combustion air inlet cap at least one foot (0.30m) above ground level and above normal snow levels.

The point of termination for the combustion air inlet cap must be at least 3 feet (0.91m) below the point of flue gas termination (powered vent cap) if it is located within 10 feet (3.05m) of the flue outlet from the powered vent cap. Make sure to properly install the air inlet cap assembly on the air inlet pipe.

You must install the combustion air inlet cap and the powered vent cap on the same wall and in the same pressure zone.

Do not install the combustion air inlet cap closer than 10 feet (3.05m) from an inside corner of an L-shaped structure.

Vertical Rooftop Air Inlet

Use the vertical air inlet terminations available from the appliance manufacturer, recommended and/or supplied by the vent manufacturer, or use two 90° elbows as described on page 24.

FIG. 16 Roof Top Combustion Air Inlet

Clearances

You must locate the air inlet termination elbow at least 12" (30cm) above the roof or above normal snow levels.

12"

TABLE–C

Minimum Recommended Combustion Air Supply To Boiler Room

Combustion Air Source

Boiler Input Outside Air*/2 Openings Outside Air*/1 Opening Inside Air/2 Openings

399,999 100 in2(745 cm2) 133 in2(858 cm2) 400 in2(2581 cm2)

500,000 125 in

(806 cm2) 167 in2(1077 cm2) 500 in2(3226 cm2)

650,000 163 in

(1052 cm2) 217 in2(1400 cm2) 650 in2(4194 cm2)

750,000 188 in

(1213 cm2) 250 in2(1613 cm2) 750 in2(4839 cm2)

990,000 248 in2(1,600cm2) 330 in2(2,129 cm2) 990 in2(6,388 cm2)

1,260,000 315 in

(2,032cm2) 420 in2(2,710 cm2) 1260 in2(8,130 cm2)

1,440,000 360 in2(2,323cm2) 480 in2(3,097 cm2) 1440 in2(9,291 cm2)

1,800,000 450 in2(2,903cm2) 600 in2(3,871 cm2) 1800 in2(11,614 cm2)

2,070,000 518 in2(3,342cm2) 690 in2(4,452 cm2) 2070 in2(13,356 cm2)

*Outside air openings shall directly communicate with the outdoors. When combustion air is drawn from the outside through a duct, the net free area of each of the two openings must have twice (2 times) the free area required for Outside Air/2 Openings. The above requirements are for the boiler only, additional gas fired units in the boiler room will require an increase in the net free area to supply adequate combustion air for all units. Combustion air requirements are based on the latest edition of the National Fuel Gas Code, ANSI Z223.1, in Canada refer to CAN/CGA-B149 Installation Code. Check all local code requirements for combustion air.

Installation and

Service Manual

If the air inlet cap is within a 10-foot (3.05m) radius of the flue outlet, the point of termination for the combustion air inlet cap must be at least 3 feet (0.91m) below the point of flue gas termination (vent cap).

Do not install the combustion air inlet cap closer than 10 feet (3.05m) from an inside corner of an L-shaped structure.

Combined Air Inlet Points

The air inlet pipes from multiple boilers can be combined to a single common connection if the common air inlet pipe has a cross sectional area equal to or larger than the total area of all air inlet pipes connected to the common air inlet pipe.

Example: Two 10" air inlet pipes (78.5 in

area each) have a

total area of 157 in

and will require a 15" (176.7 in2area)

common air inlet pipe.

The air inlet point for multiple boiler air inlets must be provided with an exterior opening which has a free area equal to or greater than the total area of all air inlet pipes connected to the common air inlet. This exterior opening for combustion air must connect directly to the outdoors. The total length of the combined air inlet pipe must not exceed a maximum of 50 (15.2m) equivalent feet. Subtract 5 feet (1.5m) for each 90° elbow in the air inlet pipe. You must deduct the restriction in area provided by any screens, grills or louvers installed in the common air inlet point. These are common on the sidewall air inlet openings. Screens, grills or louvers installed in the common air inlet can reduce the free area of the opening from 25% to 75% based on the materials used.

Vent System Options

This unit has six venting options.

1. Conventional Negative Draft Venting

This option uses a vertical rooftop flue termination. Combustion air is supplied from the mechanical room. See column 2 for detailed information.

2. Vertical DirectAire™ Venting

This option uses a vertical conventional vent for flue products. Combustion air is supplied by a pipe from the sidewall or rooftop. See page 17 for venting details.

3. Sidewall Venting

This option uses a powered vent assembly to exhaust the flue products out a sidewall vent termination. Combustion air is supplied from the mechanical room. See page 19 for venting details.

4. Horizontal DirectAire™ Venting

This option uses a powered vent assembly to exhaust the flue products out a sidewall. Combustion air is supplied by a pipe from the sidewall. See page 21 for venting details.

5. Direct Venting

This option uses a sealed AL29-4C flue and a separate combustion air pipe to the outdoors. This system terminates both the flue and combustion air inlet in the same pressure zone. The flue outlet and combustion air intake may terminate at either a sidewall (horizontal) or the rooftop (vertical). See page 22 for venting details.

6. Outdoor Installation Venting

This option uses the installation of a special air inlet/vent cap on top of the unit. See page 26 for venting details.

All units are shipped from the factory equipped for conventional negative draft venting. All other optional vent systems require the installation of specific vent kits and venting materials. The following is a detailed explanation of the installation requirements for each venting system, components used and part numbers of vent kits for each model.

Barometric Damper Location

Any venting system option that requires a barometric damper must adhere to the following directions for optimum performance.

The preferred location for the barometric damper is in a tee or collar installed in the vertical pipe rising from the unit’s flue outlet. The barometric damper MUST NOT be installed in a bull head tee installed on the unit’s flue outlet. The tee or collar containing the barometric damper should be approximately three feet vertically above the connection to the unit’s flue outlet. This location ensures that any positive velocity pressure from the unit’s internal combustion fan is dissipated and the flue products are rising due to buoyancy generated from the temperature of the flue products. Adjust the weights on the damper to ensure that draft is maintained within the specified range.

Hydronic Heating Boilers and Domestic Water Heaters

INSTALLATION

Continued

1. Conventional Negative Draft Venting

FIG. 17 Conventional Negative Draft Vertical Venting with Combustion Air Louvers

This option uses Type-B double-wall flue outlet piping. The blower brings in combustion air. The buoyancy of the heated flue products cause them to rise up through the flue pipe. The flue outlet terminates at the rooftop.

Negative Draft

The negative draft in a conventional vent installation must be within the range of 0.02 to 0.08 inches w.c. to ensure proper operation. Make all draft readings while the unit is in stable operation (approximately 2 to 5 minutes).

Connect the flue vent directly to the flue outlet opening on the top of the unit. No additional draft diverter or barometric damper is needed on single unit installations with a dedicated stack and a negative draft within the specified range of 0.02 to 0.08 inches w.c. If the draft in a dedicated stack for a single unit installation exceeds the maximum specified draft, you must install a barometric damper to control draft. Multiple unit installations with combined venting or common venting with other Category I negative draft appliances require each boiler to have a barometric damper installed to regulate draft within the proper range.

Do not connect vent connectors serving appliances vented by natural draft (negative draft) to any portion of a mechanical draft

system operating under positive pressure. Connecting to a positive pressure stack may cause flue products to be discharged into the living space causing serious health injury.

Flue Outlet Piping

With this venting option, you must use Type-B double-wall (or equivalent) vent materials. Vent materials must be listed by a nationally-recognized test agency for use as vent materials. Make the connections from the unit vent to the outside stack as direct as possible with no reduction in diameter. Use the National Fuel Gas Code venting tables for double-wall vent to properly size all vent connectors and stacks. Follow the vent manufacturer’s instructions when installing Type-B vents and accessories, such as firestop spacers, vent connectors, thimbles, caps, etc.

Provide adequate clearance to combustibles for the vent connector and firestop.

When planning the venting system, avoid possible contact with plumbing or electrical wiring inside walls, ceilings, and floors. Locate the unit as close as possible to a chimney or gas vent.

Avoid long horizontal runs of the vent pipe, 90° elbows, reductions and restrictions.

No additional draft diverter or barometric damper is required on single unit installations with a dedicated stack and a negative draft maintained between 0.02 to 0.08 inches w.c.

Common Venting Systems

You can combine the flue with the vent from any other negative draft, Category I appliance. Using common venting for multiple negative draft appliances requires you to install a barometric damper with each unit. This will regulate draft within the proper range. You must size the common vent and connectors from multiple units per the venting tables for Type-B double-wall vents in the latest edition of the National Fuel Gas Code, ANSI Z223.1 and/or CAN/CGA-B149 Installation Code.

Common venting systems may be too large when an existing unit is removed.

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

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

2. Visually inspect the venting system for proper size and horizontal pitch. Make sure there is no blockage or restriction, leakage, corrosion and other unsafe conditions.

IMPORTANT: Before installing a venting system, follow all venting clearances and requirements found in the Venting, General Information section, page 11.

Installation and

Service Manual

3. If possible, close all building doors and windows. Close all doors between the space in which the appliances remaining connected to the common venting system are located and other building spaces.

4. Turn on clothes dryers and any other appliances 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.

5. Close fireplace dampers.

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

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

8. After making sure that each appliance remaining connected to the common venting system properly vents when tested as above, return doors, windows, exhaust fans, fireplace dampers and other gas burning appliances to their previous conditions of use.

9. Correct any improper operation of the common venting system so that the installation conforms to the latest edition of the National Fuel Gas Code, ANSI Z223.1, in Canada, the latest edition of CAN/CGA-B149 Installation Code for Gas Burning Appliances and Equipment. When resizing any portion of the common venting system, resize to approach the minimum size as determined using the appropriate tables of the latest edition of the National Fuel Gas Code, ANSI Z223.1, in Canada, the latest edition of CAN/CGA-B149 Installation Code for Gas Burning Appliances and Equipment.

Masonry Chimney Installations

A masonry chimney must be properly sized for the installation of a high efficiency gas-fired appliance. Venting of a high efficiency appliance into a cold or oversized masonry chimney can result in operational and safety problems. Exterior masonry chimneys, with one or more sides exposed to cold outdoor temperatures, are more likely to have venting problems. The temperature of the flue products from a high efficiency appliance may not be able to sufficiently heat the masonry structure of the chimney to generate proper draft. This will result in condensing of flue products, damage to the masonry flue/tile, insufficient draft and possible spillage of flue products into an occupied living space. Carefully inspect all chimney systems before installation.

Inspection of a Masonry Chimney

A masonry chimney must be carefully inspected to determine its suitability for the venting of flue products. A clay-tile-lined chimney must be structurally sound, straight and free of misaligned tile, gaps between liner sections, missing sections of liner or any signs of condensate drainage at the breaching or clean out. If there is any doubt about the condition of a masonry chimney, it must be relined with a properly-sized and approved chimney liner system. An unlined masonry chimney must not be used to vent flue products from this high-efficiency unit. An

unlined chimney must be relined with an approved chimney liner system when a new appliance is being attached to it.

Metallic liner systems (Type-B double-wall or flexible or rigid metallic liners) are recommended. Consult with local code officials to determine code requirements or the advisability of using or relining a masonry chimney.

Vertical Vent Termination Clearances and Location

Follow all vertical venting termination information for clearances and location under Vertical Vent Termination Clearances and Location, page 11.

2. Vertical DirectAire™ Venting

The Vertical DirectAire™ vent system is the same as the Conventional Negative Draft vent system, except it pulls combustion air from the outdoors through a vertical air inlet. Follow all requirements in 1. Conventional Negative Draft Venting, page 16.

IMPORTANT: Before installing the venting system, follow all venting clearances and and requirements found in the Venting, General Information section, page 11.

 WARNING: Do not vent this unit into a

masonry chimney without a sealed stainless steel liner system. Any breaks, leaks, or damage to the masonry flue/tile will allow the positivepressure flue products to leak from the chimney and into occupied living spaces. This could cause serious injury or death due to carbon monoxide poisoning and other harmful flue products.

IMPORTANT: Check with local code officials to determine code requirements or the advisability of using a masonry chimney with a sealed corrosion-resistant liner system.

Hydronic Heating Boilers and Domestic Water Heaters

INSTALLATION

Continued

The Vertical DirectAire™ vent system requires you to install two vent pipes directly to the unit; one vertical pipe with a rooftop termination for the flue products and one pipe for combustion air. For this venting option, you must purchase the DV box adapter from the appliance manufacturer. The DV box attaches to the air inlet of the unit. The pipe for combustion air attaches to the DV box.

You can terminate the combustion air pipe either horizontally with a sidewall air inlet or vertically with a rooftop air inlet. The installed length of air inlet pipe from the unit to the outside air inlet cap must not exceed 50 equivalent feet (15.2m).

FIG. 18 Vertical DirectAire Installation with Sidewall Combustion Air Inlet

FIG. 19 Air Inlet Cap for Sidewall Termination

FIG. 20 Vertical DirectAire Installation with Roof Top Combustion Air Inlet

Vent Kits

For single unit installations with sidewall air inlet, (see FIG. 18) you must order the sidewall air inlet kit from the appliance manufacturer. The part number for each SVK kit is listed by unit size in TABLE–D.

For single unit installations with rooftop air inlet (see FIG. 20), you must order the rooftop air inlet kit from the appliance manufacturer. The part number for each VDK kit is listed by unit size in TABLE-D. Purchase the flue pipe, rooftop flue termination, and air inlet pipe locally.

There is no vent kit for combined air supply systems for multiple units. Make sure the air inlet cap is properly sized. You must purchase this cap locally.

Venting of Flue Products

For venting flue products vertically to the outdoors, follow all requirements in the installation instructions for conventional venting in this manual.

Follow all clearance requirements in Vertical Vent Termination Clearances and Location, page 11.

A barometric damper is not required in the flue on Vertical DirectAire™ installations if the draft is within the negative

0.02 to 0.08 inches w.c. required for proper operation. If the draft exceeds this range, install a barometric damper.

™

 WARNING: Only use a sidewall air inlet

cap supplied by the appliance manufacturer or a rooftop air inlet cap supplied by the vent manufacturer. Using any other air inlet cap for single unit installations or using a common air inlet cap for multiple units with insufficient free area and/or protections from wind and weather may result in operational problems and the spillage of flue products. Spillage of flue products can cause personal injury or death due to carbon monoxide poisoning.

12"

Installation and

Service Manual

*The SVK kits include a DV box adapter and sidewall air inlet cap. The VDK kits include a DV box adapter and a rooftop air inlet cap.

3. Sidewall Venting

This option uses a powered vent assembly which pulls the flue products out of the stack. This fan generates a negative draft at the unit. Combustion air is drawn from the mechanical room (see Combustion and Ventilation Air, page 8).

FIG. 21 Sidewall Venting Installation with an Induced Draft Fan and Sidewall Vent Cap

Sidewall Fan

The sidewall fan can be mounted on the inside/outside (depending upon model) with a sidewall vent hood installed on the exterior wall. The sidewall fan and accessories are included

in a venting kit provided by the appliance manufacturer. See TABLE–E for kit numbers.

The venting kit includes the sidewall fan, vent hood, tapered vent adapter, barometric damper, proving switch and all necessary relays to interlock with the heaters control system. The tapered vent adapter reduces the vent size at the inlet to the fan. There should be no reduction in vent diameter from the unit’s flue outlet to the sidewall fan. The barometric damper must be installed on the flue and adjusted to supply a negative draft within the range of 0.04 to 0.08 inches w.c. while unit is operating.

Flue Outlet Piping

With this venting option, you must use Type-B double-wall (or equivalent) vent materials. Vent materials must be listed by a nationally-recognized test agency for use as vent materials. Make the connections from the unit vent to the sidewall fan/cap as direct as possible with no reduction in diameter. Use the National Fuel Gas Code venting tables for double-wall vent to properly size all vent connectors and stacks. Follow the vent manufacturer’s instructions when installing Type-B vents and accessories, such as firestop spacers, vent connectors, thimbles, caps, etc.

When planning the venting system, avoid possible contact with plumbing or electrical wiring inside walls.

The maximum installed length of sidewall vent pipe with an induced draft fan must not exceed 100 feet (30.5m). Subtract 5 feet (1.5m) for each 90° elbow. Subtract 2.5 feet (0.7m) for each 45° elbow.

Sidewall Venting Termination

The sidewall vent cap must be installed on an exterior sidewall. The sidewall fan/powered sidewall vent cap and accessories are included in a venting kit which is furnished by the appliance manufacturer in accordance with CSA International requirements. This venting kit includes the powered sidewall fan/cap, proving switch and all necessary relays to interlock with the heaters control system.

The sidewall fan/powered vent cap must be interlocked with the units control system to start the fan on a call for heat and prove fan operation before the boiler fires. Plug-in and terminal strip connections are provided on the unit for easy connection of the factory supplied vent kit and control package for the sidewall vent fan. See the installation instructions provided with the vent kit.

Sidewall Venting Without Fan

For 399,999 - 750,000 Btu/hr models approved for sidewall venting without an external power vent fan, you must install specific vent kits and venting materials.

IMPORTANT: Before installing venting system, follow all venting clearances and requirements found in the Venting, General Information section, page 11.

Input Horizontal Vertical

Btu/hr Kit* Kit*

399,999 SVK3047 VDK3026

500,000 SVK3047 VDK3026

650,000 SVK3048 VDK3027

750,000 SVK3048 VDK3027

990,000 SVK3040 VDK3023

1,260,000 SVK3041 VDK3024

1,440,000 SVK3041 VDK3024

1,800,000 SVK3041 VDK3024

2,070,000 SVK3041 VDK3024

TABLE-D

DirectAire™ Kits

Hydronic Heating Boilers and Domestic Water Heaters

INSTALLATION

Continued

The following is a detailed explanation of Sidewall Venting Without an External Power Vent Fan installation requirements.

Flue Outlet Piping

Venting Guidelines

If using this venting option, a sealed AL29-4C venting system for flue products is required on all models of this appliance. This venting system operates with a positive pressure in the vent. The internal combustion air blowers generate this positive pressure which operates the combustion process and also exhausts the flue products from the building.

This vent system has specific vent material and installation requirements. Only use listed sealed AL29-4C vent system materials. Follow all installation requirements. See TABLE–B, page 13 for proper pipe size for your unit. A list of sealed AL29-4C flue pipe manufacturers is located on page 24.

Seal all vent joints and seams gas-tight.

Drain Tee Installation

A drain tee must be installed in the vent pipe to collect and dispose of any condensate that may occur in the vent system. The drain tee must be installed as the first fitting after the horizontal ell on the top of the unit. Plastic drain tubing, sized per the vent manufacturer’s instructions, shall be provided as a drain line from the tee. The drain tubing must have a trap provided by a 3" (7.6cm) diameter circular trap loop in the drain tubing. Prime the trap loop by pouring a small quantity of water into the drain hose before assembly to the vent. Secure the trap loop in position with nylon wire ties. Use caution not to collapse or restrict the condensate drain line with the nylon wire ties. The condensate drain must be routed to a suitable drain for disposal of condensate that may occur in the direct vent system. Refer to the condensate drain installation instructions as supplied by the manufacturer of the vent material.

FIG. 22 Sidewall Vent

Connect the flue vent directly to the flue outlet opening on the top of unit. Make the connections from the unit vent to the outside stack as direct as possible with no reduction in diameter. Provide adequate clearance to combustibles for the vent connector and firestop. Follow the vent manufacturer’s instructions when installing sealed AL29-4C vents and accessories, such as firestop spacers, vent connectors, thimbles, caps, etc.

Provide adequate clearance to combustibles for the vent connector and firestop.

When planning the venting system, avoid possible contact with plumbing or electrical wiring inside walls, ceilings, and floors.

Locate the unit as close as possible to chimney or gas vent. When a vent system is disconnected for any reason, the flue must be reassembled and resealed according to the vent manufacturer’s instructions.

The installed length of flue from the unit to the outside point of termination must not exceed 50 equivalent feet (15.2m). Subtract 5 feet (1.5m) of equivalent length for each 90° elbow. Subtract 2.5 feet (0.7m) of equivalent length for each 45° elbow.

 WARNING: Do not combine the flue

from this unit with the vent from any other appliance. Do not combine flues from multiple appliances into a common vent. The flue from this unit must be a dedicated stack.

Installation and

Service Manual

Masonry Chimney Installation

Sidewall Vent Termination Clearances and Location

Follow all sidewall venting termination information for clearances and location under Sidewall Vent Termination Clearances and Location, page 12.

Input Kit* Max. Vent Vent Max. Vent Btu/hr (w/Power Length Termination Only Length

Fan Assy.)

(399,999 - 750,000 Btu/hr)

399,999 SVK3006 100 ft. SVK3043 50 ft.

500,000 SVK3006 100 ft. SVK3043 50 ft.

650,000 SVK3008 100 ft. SVK3044 50 ft.

750,000 SVK3008 100 ft. SVK3044 50 ft.

990,000 SVK3009 100 ft. N/A N/A

1,260,000 SVK3010 100 ft. N/A N/A

1,440,000 SVK3010 100 ft. N/A N/A

1,800,000 SVK3012 100 ft N/A N/A

2,070,000 SVK3012 100 ft. N/A N/A

*These kits include a sidewall venter assembly, vent termination, and barometric damper.

4. Horizontal DirectAire™ Venting

The Horizontal DirectAire™ vent system is the same as the Sidewall Venting system, except it pulls combustion air from the outdoors through a sidewall air inlet. Follow all requirements in Sidewall Venting, page 19.

The Horizontal DirectAire™ vent system requires you to install two vent pipes directly to the unit; one pipe for flue products and one for combustion air. Install both vent pipes horizontally with a sidewall termination point. For this venting option, you must purchase the DV box accessory from the appliance manufacturer. The DV box attaches to the air inlet of the unit. The pipe for combustion air attaches to the DV box.

Make vent connection directly to the top of the unit. No additional draft diverter or barometric damper is required on single unit installations with a dedicated stack and a negative draft maintained between 0.04 to 0.08 inches w.c.

The Horizontal DirectAire™ combustion air supply system has specific vent material and installation requirements. The air inlet pipe connects directly to the boiler to supply combustion air. The combustion air inlet pipe is a dedicated system with one air inlet pipe per boiler. You must connect the air inlet pipe to a combustion air inlet cap as specified in this section.

TABLE-E

Sidewall Vent Kits

IMPORTANT: Before installing a venting system, follow all venting clearances and requirements found in the Venting, General Information section, page 11.

 WARNING: Do not vent this unit into a

masonry chimney without a sealed stainless steel liner system. Any breaks, leaks, or damage to the masonry flue/tile will allow the positive-pressure flue products to leak from the chimney and into occupied living spaces. This could cause serious injury or death due to carbon monoxide poisoning and other harmful flue products.

IMPORTANT: Check with local code officials to determine code requirements or the advisability of using a masonry chimney with a sealed corrosion-resistant liner system.

Hydronic Heating Boilers and Domestic Water Heaters

INSTALLATION

Continued

FIG. 23A Horizontal DirectAire Installation (Illustration with Sidewall Venter and Sidewall Combustion Air)

Combustion air supplied from outdoors must be free of contaminants (see Combustion and Ventilation Air, page 8).

Vent Kits

You must order the Horizontal DirectAire™ Vent Kit for sidewall installation from the appliance manufacturer. See TABLE–F for kit numbers. Each kit includes a sidewall powered vent cap fan, proving switch, controls, combustion air inlet cap to supply air to a single unit, the transition adapter to attach the field supplied single wall air inlet pipe to the unit and installation instructions. Purchase flue pipe and air inlet pipe locally.

The sidewall air inlet cap supplied in the Horizontal DirectAire™ Vent Kit is used to supply combustion air to a single boiler. Combustion air supply pipes from multiple units can not be combined into a single air inlet pipe and inlet point.

Venting of Flue Products

For venting flue products horizontally, follow all requirements in the installation instructions for sidewall venting.

Termination point for the flue products must follow the clearance requirements in Sidewall Venting Termination, page 19.

For proper operation, a barometric damper is provided for Horizontal DirectAire

installations. The damper will help to

ensure a draft between negative 0.04 to 0.08 inches w.c.

TABLE–E

Input

Btu/hr Kit*

399,999 HDK3031

500,000 HDK3031

650,000 HDK3032

750,000 HDK3032

990,000 HDK3026

1,260,000 HDK3027

1,440,000 HDK3027

1,800,000 HDK3028

2,070,000 HDK3028

*These kits include a sidewall venter assembly, vent termination, DV box adapter, sidewall air inlet cap, and a barometric damper.

5. Direct Venting

This option uses sealed AL29-4C vent materials for the flue outlet piping and separate combustion air inlet piping. This system terminates both the flue and combustion air inlet in the same pressure zone. The flue outlet and combustion air intake may terminate at either a sidewall or the rooftop.

To use the optional Direct Vent system, you must install specific vent kits and venting materials. The following is a detailed explanation of Direct Vent installation requirements, including the components used and vent kit part numbers.

Flue Outlet Piping

Venting Guidelines

Seal all vent joints and seams gas-tight.

 WARNING: Only use the sidewall air inlet

cap recommended by the appliance manufacturer. Using another sidewall air inlet cap may result in operational problems and the spillage of flue products. Spillage of flue products can cause personal injury or death due to carbon monoxide poisoning.

TABLE-F

Horizontal DirectAire™ Kits

IMPORTANT: Before installing venting system, follow all venting clearances and requirements found in the Venting, General Information section, page 11.

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