ICP GNK050N12A3, GNK075N14A3, GNK100N16A3, NTGM050EFA3, NTGM075EGA3 Installation Guide

...

NTGM/GNK Series Upflow/Horizontal

NCGM/GCK Series Downflow/Horizontal

SAFETY REQUIREMENTS

Recognize safety information. This is the safety-alert symbol _. When you see this symbol on the furnace and in instructions or manuals be alert to the potential for personal injury.

Understand the signal words DANGER, WARNING, or CAUTION. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards, those that will result in severe personal injury or death. WARNING signifies a hazard that could

result in personal injury or death. CAUTION is used to identify unsafe practices that could result in minor personal injury or product and property damage.

Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only trained and qualified person- nel should install, repair, or service heating equipment.

Untrained service personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be performed by trained service personnel. When working on heating equipment, observe precautions in the literature, on tags,

and on labels attached to or shipped with the unit and other safety precautions that may apply. Follow all safety codes. In the United States, follow all safety codes including the current edition National Fuel Gas Code (NFGC) NFPA

No. 54/ANStZ223.1. In Canada, refer tothe current edition ofthe National Standard Canada CAN/CGA-B149.1 - and .2-M91 Natural Gas and Propane Installation Codes (NSCNGPIC). Wear safety glasses and work gloves. Have fire extinguisher available during start-

up and adjustment procedures and service calls. These instructions cover minimum requirements and conform to existing national standards and safety codes. In some instances,

these instructions exceed certain local codes and ordinances, especially those that may not have kept up with changing residential

construction practices. We requre these instructions as a minimum for a safe installation.

Design Certified

byAGA

Manufactured by:

International Comfort Products Corporation (USA)

Lewisburg, TN USA 37091

Table of Contents

1.SafeInstallationRequirements................ 2

2.Installation............................... 4

3.Combustion&VentilationAir ................ 9

4.Vent& CombustionAirPiping ................ 11

5.GasSupplyandPiping ...................... 19

6.ElectricalWiring ........................

7.DuctworkandFilter(Upflow/Horizontal)......

8.DuctworkandFilter(Downflow/Horizontal)....

9. ChecksandAdjustments.................

10.FurnaceMaintenance ...................

11.ConcentricVentTermination..............

Fire or Explosion hazard. This furnace is not designed for use in mobile

homes, trailers or recreational vehicles. Such use could result in death, bodily injury

and/or property damage.

LP1 6/9/2000 440 01 1002 01

22 23

25 28

30 30

1.Safe InstallationRequirements

Installation or repairs made by unqualified persons can result in hazards to you and others.

Installation MUST conform with local codes or, in the absence of local codes, with codes of all governmental authorities having jurisdiction.

The information contained in this manual is

intended for use by a qualified service technician who is experienced in such work, who is familiar with all precautions and safety procedures

required in such work and is equipped with the

proper tools and test instruments.

Failure to carefully read and follow all instruc- tions in this manual can result in furnace

malfunction, death, personal injury and/or

property damage.

NOTE: This furnace is design certified by the American Gas

Association and the Canadian Gas Association for installation in the United States and Canada. Refer to the appropriate codes,

along with Figure 1 or Figure 2 and this manual, for proper instal- lation.

• This furnace is NOT approved for installation in mobile

homes, trailers or recreation vehicles.

Do NOT use this furnace as aconstruction heater or to heat a building that is under construction.

Use only the Type of gas approved for this furnace (see Rating Plate on unit). Overfiring will result in failure of heat exchanger and cause dangerous operation. (Furnaces can be converted to L.P. gas with approved kit.)

• Do NOT use open flame to test for gas leak.

• Ensure adequate combustion and ventilation air is pro- vided to the furnace.

• Seal supply and return air ducts.

• The vent system MUST be checked to determine that it is the correct type and size.

• Install correct filter type and size.

• Unit MUST be installed so electrical components are pro- tected from direct contact with water.

NOTE: It is the personal responsibility and obligation of the end user to contact a qualified installer to ensu rethat the installation is

adequate and conforms to governing codes and ordinances.

SafetyRules

Your unit is built to provide many years of safe and dependable service providing it is properly installed and maintained. However, abuse and/or improper use can shorten the life of the unit and

create hazards for you, the owner.

A. The U.S. Consumer Product Safety Commission recom-

mends that users of gas-burning appliances install carbon monoxide detectors. There can be various sources of car-

bon monoxide in a building or dwelling. The sources could be gas-fired clothes dryers, gas cooking stoves, water

heaters, furnaces, gas-fired fireplaces, wood fireplaces, and several other items. Carbon monoxide can cause seri-

ous bodily injury and/or death. Therefore, to help alert people of potentially dangerous carbon monoxide levels,

you should have carbon monoxide detectors listed by a na- tionally recognized agency (e.g. Underwriters Laboratories or International Approval Services) installed and main-

tained in the building or dwelling (see Note below).

B. There can be numerous sources of fire or smoke in a build-

ing or dwelling. Fire or smoke can cause serious bodily inju- ry, death, and/or property damage. Therefore, in order to

alert people of potentially dangerous fire or smoke, you should have fire and smoke detectors listed by Underwrit-

ers Laboratories installed and maintained in the building or dwelling (see Note below).

Note: The manufacturer of your furnace does not test any de-

tectors and makes no representations regarding any brand or type of detector.

C. To ensure safe and efficient operation of your unit, you

should do the the following:

1. Thoroughly read this manual and labels on the unit. This will help you understand how your unit operates and the hazards involved with gas and electricity.

2. Do not use this unit if any part has been under water. Immediately call a qualified service technician to inspect

the unit and to replace any part of the control system and any gas control which has been under water.

3. Never obstruct the vent grilles, or any ducts that pro-

vide air to the unit. Air must be provided for proper com-

bustion and ventilation of flue gases. Carbon monoxide or "CO" is a colorless and odorless gas

produced when fuel is not burned completely or when the flame does not receive sufficient oxygen.

FreezingTemperaturesandYourStructure

Freeze warning.

Turn off water system.

If your unit remains shut off during cold weather

the water pipes could freeze and burst, resulting

in serious water damage.

Your unit is equipped with safety devices that may keep itfrom op- erating if sensors detect abnormal conditions such as clogged ex-

haust flues. Ifthe structure will be unattended during cold weather you should

take these precautions.

1. Turn off main supply water into the structure and drain the water lines if possible. Open faucets in appropriate areas.

2. Have someone check the structure frequently during cold weather to make sure it is warm enough to prevent pipes

from freezing. Suggest they call qualified service agency, if required.

[_ 44001 100201

Dealer Name:

START-UP CHECK SHEET

(Keep this page for future reference)

Address:

City, State(Province), Zip or Postal Code:

Phone: Owner Name:

Address:

City, State(Province), Zip or Postal Code:

Model Number:

Serial Number:

Type of Gas:

Blower Motor H.P.:

Supply Voltage:

Limit Opens at...(°F) or(°C)

Natural: _1 LP: _1

Business Card Here

Drip-Leg Upstream of Gas Valve?

Condensate Drain Connected? YES _1

Condensate Drain Trapped? YES _1

Horizontal Condensate Switch Installed? YES _1 NO _1

Blower Speed Checked? YES _1 NO _1

All Electrical Connections Tight? YES _1 NO _1

Gas Valve OK? YES _1 NO _1

Measured Line Pressure When Firing Unit:

YES _1 NO _1

NO_1

Noel

Limit Closes at._(°F) or(°C)

Which blower speed tap is used? (Heating) (Cooling)

Temperature of Supply Air: (°F) or(°C)

Temperature of Return Air: (°F) or(°C)

Rise (Supply Temp.-Return Temp.): (°F) or(°C)

Filter Type and Size:

Fan "Time ON" Setting:

Fan "Time OFF" Setting:

Manual Gas Shut-Off Upstream of Furnace/Drip-Leg? YES _1 NO _1

Dealer Comments:

Calculated Firing Rate: (See Checks and Adjustments Sec-

tion).

Measured Manifold Pressure:

Thermostat OK? YES _1

Subbase Level? YES _1

Anticipator Set? YES _1

Breaker On? YES _1

Date of Installation:

Date of Start-Up:

NOel

NO[_I

NO _1 Set At?:

NO_1

440 01 100201 [_

2. Installation

Poison carbon monoxide gas Hazard.

This furnace can NOT be common vented or connected to any type B, BW or L vent or vent

connector, nor to any portion of a factory-built or

masonry chimney. If this furnace is replacing a previously common-vented furnace, it may be

necessary to resize the existing vent line and chimney to prevent oversizing problems for the other remaining appliance(s). See Venting and

Combustion Air Check in Gas Vent Installation section. This furnace MUST be vented to the outside,

Failure to properly vent this furnace or other appliances can result in death, personal injury and/or property damage.

*8" (200ram)Min. 20' (6m)Max. in sameatmosphericzone

Typical Upflow Installation

Aluminumor non-rusting shieldrecommended.

(SeeVentTerminationShieldin fordimensions).

exhaustpipe.Total pipe& couplingout-

sidestructure=8"

;ouplingon_nds of

'8" (200ram)Min. 20' (6m)Max.

insameatmosphericzone

DualCertifiedFurnace

The"NCGM", "GCK","NTGM"and"GCK"furnacesare dual certi-

fied. Thismeansthatthe INLET pipe isoptional.See Figure 1 or

Figure 2 for identificationof INLET and OUTLETpipe. Combus-

tion aircan bedrawnfrom outside thestructureorinsidethe struc- ture. Ifdrawingcombustion airfrom insidethe structure, adequate

make up air MUST be provided to compensate for oxygen burned. See Confined Space Installation in the Combustion

and Ventilation Air chapter.

Locationand Clearances

1. Refer to Figure 1or Figure 2 for typical installation and ba- sic connecting parts required. Refer to Figure5 or

Figure 6 for typical horizontal direct vent installation and basic connecting parts required. Supply and return air ple-

nums and duct are also required.

2. If furnace is a replacement, it is usually best to install the furnace where the old one was. Choose the location or

evaluate the existing location based upon the minimum clearance and furnace dimensions (Figure 3 or Figure 4).

CAUTION

Special precautions MUST be made if installing furnace in an area which may drop below freezing. This

can cause improper operation or damage to equipment. If furnace environment has the potential of freezing, the drain trap and drainline must be protected. The use of electric heat tape or RV

antifreeze is recommended for these installations. (See "Condensate Trap Freeze Protection Section ")

Do NOT operate furnace in a corrosive atmosphere containing chlorine, fluorine or any other damaging

chemicals. Refer to Combustion & Ventilation Air

section, Contaminated Combustion Air.

25-20-70

* Increaseminimumfrom8" to 18" forcoldclimates(sustainedtemperaturesbelow 0 ° F).

Typical Downflow Installation

See VentTermination

Shielding inVent _ction.

*8" (200mm) Min._ _ 20' (6m)Max. _> ___ InletPip

Zoiqe

in same atmospheric _ Optional\

supportedHorizontally andVertically

Couplingon inside

_re d outsideof wall

strainventpipe

"8"(200mm)Min.

/ 20' (6m)Max.

insameatmospheric

zone

Teeto preventairlock

CondensateNeutralizer

(Onlyifrequired)

*Increaseminimumfrom8"to18"forcoldclimates(sustainedtemperatures

belowO°F}.

[_ 44001 100201

iiiiiii!!i!liiiii/l;i!iiiii/!iiiiiiii!liil;iii/iiiiiiiiii'ii!iii!!///!i

!! !!!!OimensionsandC,earances,orUp.owFurnace

__ Back Cabinet to

Drain TOPIBOT"I

Connection 1 ' 0'

"""'-_ 718 (22) _' _ 25-20-65

Combustible Clearances

i I'C IF= TI 'OE0' 0' 0' 3' 0"

Unit

Capacity

50,000 75,000

100,000 125,000

Unit

Capacity

50,000

75,000 100,000 125,000

turnEquivalents 48" = (1219) 191/8" = (486) 228/4"= (578) 263/8" = (670) 281/2"= (724) 11/2"= (38) 15/8" = (41) 21/2"= (64)

41/2"= (114) t75/16" = (440) 181/2"= (470) 175/8"= (448) 211/4"=(540) 247/8"= (632) 247t8" = (632) 231/8" =(587) t43/4" = (375)

t83/4" = (476) 231/2"=(597) 221/2" = (572) 141/2" = (368) 321/2"= (825) 237/8"= (606) 261/16"=(662) 107/8" = (276) 23/4" = (70)

61/2" = (165) 211/16"=(68) 4131_6"= (122) 127/8" = (327) 1411/16"= (373) 18" = (457) 2_1/16"= (68) 21/8" = (54) 17/8"= (48)

t7/16" = (37)

Cabinet

48 191t8 281_ 48 19118 281_

48 223/4 281_ 48 26_8 281_

GasConnections

RightSide LeftSide

N P N P R

321/2 237t8 321/2 261/16 107/8 321/2 237/8 321/2 261/16 107/8

321/2 237t8 321/2 261/16 107/8 321/2 237t8 321/2 261/16 107/8

Top LeftSide LowVolt

D E D E F G

11/2 11/2 t5/8 21/2 41/2 17_16 11/2 11/2 t5/8 21/2 41/2 17_16

11/2 11/2 t5/8 21/2 41/2 17_16 11/2 11/2 t518 21/2 41/2 17_16

ElectricalConnections

DrainConnections

RightSide LeftSide

S S

23/4 61t2 23/4 61/2

23/4 61/2 23/4 61/2

ALL DIMENSIONS IN INCHES (MM)

SupplyAir

H I

18112 175/8 181/2 175/8

181/2 211/4 181/2 247/8

SupplyAir

T V

211116 413/16 211/16 413/16

211/16 413/16 211/16 413/16

J K L

231/8 143/4 221/2 t41t2 231f8 143/4 221/2 t41/2

231/8 183/4 221/2 t41t2 231/8 231/2 221/2 t41t2

ReturnAir

Bottom Side

ReturnAir

Bottom

W Y Z

127/8 211/16 21/8 127/8 211/16 21/8

t411116 211/16 17/8

18 211/16 17/16

440 01 100201 [_

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Dimensions and Clearances for Downflow

¥ v

Cabinet to Combustible Clearances

TOP BOT. RH LH BACK FRNT FLUE

0" 0"* 0" 0" 0" 3" O"

* Can not be installed directly on combustible flooring.

Supp _'plenum must have 1" clearance for first 6' from furnace.

_ 33/4

c B/

25-21-83 _"/

Unit

Capacity

50,000 75,000

100,000 125,000

Unit

Capacity

50,000 75,000

100,000 125,000

ram Equivalents 48" = (1219) 191/8" = (486) 223/4" = (578) 263/8" = (670) 281/2" = (724) 11/2" = (38) 15/8" = (41) 21/2" = (64)

41/2" = (114) t75/16" = (440) 181/2" = (470) 175/8" = (448) 211/4" =(540) 247/8" = (632) 247t8" = (632) 23118" = (587) t43/4 " = (375)

t83/4" = (476) 231/2" = (597) 221/2" = (572) 141/2" = (368) 321/2 ', = (825) 237/8" = (606) 261/16" = (662) 107/8" = (276) 23/4" = (70)

61/2" = (165) 211/16" = (68) 413/16" = (122) 127/8" = (327) 1411116"= (373) 18" = (457) 211t16" = (68) 21/8" = (54) 17/8" = (48)

t7/16" = (37)

Cabinet

A B C

48 191/8 28112 48 191/8 28112 48 223/4 28112

48 263/8 28112

Gas Connections

Right Side LeftSide

M N M N

163/8 193/8 163/8 t93/8 163/8 193/8 163/8 t93/8 163/8 193/8 163/8 t93/8

163/8 193/8 163/8 t93/8

D E D E F G

11/2 11/2 1 5/8 2 1/2 3 3/4 341/2 1 1/2 1 1/2 1 5/8 2 1/2 3 3/4 34 1/2 1 1/2 1 1/2 1 5/8 2 1/2 3 3/4 34 1/2

1 1/2 1 1/2 1 5/8 2 1/2 3 3/4 34 1/2

Top LeftSide LowVolt

ElectricalConnections

DrainConnections

RightSide LeftSide

R S L P R S

13 61& 25 _18 24 13 61& 13 61& 25 _18 24 13 61& 13 61_ 25 _16 24 13 61_

13 61_ 25 _16 24 13 61_

ALL DIMENSIONS IN INCHES (MM)

ReturnAir

Top

H I J

181/2 175/8 17 181/2 175/8 17 181/2 21 1/4 17

181/2 247/8 17

FlueOutlet

T 3

53/16

SupplyAir

Bottom

K Z

t75_ 3_ t75_ 3_

2216 3_ 247_ 3_

AirInlet

1213/16 1213/16

3 13/16 3 13/16 3 13/16

3 13/16

InstallationRequirements

1. Install furnace level.

2. This furnace is NOT to be used for temporary heat of build-

For downflow installations, non combustible subbase must be used under the furnace unless installation is on a non

combustible floor surface. This requirement applies even

when a coil box or cabinet is used.

ings or structures under construction.

3. Install furnace as centralized as practical with respect to the heat distribution system.

4. Install the vent pipes as short as practical. (See Vent and

Combustion Air Piping section).

5. Maintain clearance for fire safety and servicing. A front

clearance of 30" (762mm) is recommended for access to the burner, controls and filter.

6. Use a raised base for upflow furnace if the floor is damp or

Fire Hazard. Place furnace on noncombustible cement board

or sheet metal on downflow applications. Failure to install unit on noncombustible cement

board or sheet metal can result in death, personal injury and/or property damage.

wet at times.

[_ 44001100201

8. For horizontal installations, line contact is permissible only between lines formed by intersection of back and two sides

of furnace jacket, and building joists, studs or framing.

9. Residential garage installations require:

• Burners and ignition sources installed at least 18" (457mm) above the floor.

• Located or physically protected from possible damage by a vehicle.

10. Local codes may require a drain pan under the entire fur- nace and condensate trap when the furnace is installed in

attic application.

HorizontalFurnaceInstallation

Typical Horizontal Installation

(NCGM/GCK)

Inlet Pipe (Optional)

Vent Pipe

Fire, Explosion, and/or Poison carbon monoxide gas Hazard.

Make certain model installed is certified for use in multiple configurations.

Failure to install unit in configuration for which it is certified can result in death, personal injury and/or property damage.

NOTE: Inspect unit rating plate to be certain model number be-

gins with "NTGM", GNK" "NCGM" or "GCK'. This identifies unit as horizontally mountable. Ifunit does NOT bear this designation, you may NOT mount this unit horizontally. Unit may not be

mounted on its back. If you purchased a horizontally mountable furnace, it can be

installed horizontally in an attic, basement, crawl space, alcove, or suspended from a ceiling in a basement or utility room in only a right-to-left (NTGM/GNK) or left-to-right (NCGM/GCK) air-

flow position. See Figure 5 or Figure 6. Do not install furnace on

its back or in the reverse airflow positions as safety control opera-

tion will be adversely affected.

Typical Horizontal Installation

(NTGM/GNK)

Inlet Pipe

Vent

Pipe

Condensate

Trap (field

supplied)

Condensate Trap (field

supplied) NOTE: 5" bottom clearance required for condensate trap.

If the furnace is to be suspended from the floor joists in a crawl space or the rafters in an attic, it is necessary to use steel pipe

straps or an angle iron frame to ridgely attach the furnace to pre- vent movement. These straps should be attached to the furnace with sheet metal screws and to the rafters or joists with bolts. The

preferred method is to use an angle iron frame bolted to the rafters

or joists. (Take caution to allow door panels to be removed for

maintenance)

If the furnace is to be installed in a crawl space, consult local

codes. A suitable concrete pad or blocks are recommended for

crawl space installation on the ground.

NOTE: 5" bottom clearance required for condensate trap.

Thirty (30) inches(760mm) between the front of the furnace and

adjacent construction or other appliances MUST be maintained for service clearance.

Keep all insulating materials clear from Iouvered door. Insulating

materials may be combustible.

The horizontal furnaces may be installed directly on combustible wood flooring or supports as long as all required furnace clear-

ances are met. See Figure 3.

This furnace MUST NOT be installed directly on carpeting or tile

or other combustible material other than wood flooring or sup-

ports.

For horizontal installation over a finished living space. A field fab-

ricated auxiliary drain pan with drain pipe is recommended to pre- vent damage by overflow due to blocked condensate drain.

25-21-81

BlockedCondensateDrainPressureSwitch

25-21-81 a

NOTE: 5" bottom clearance required for condensate trap.

440 01 100201

(AccessoryKitNAHL001HK)

For horizontal furnace installations, a blocked condensate drain

pressure switch MUST be used. Follow the directions outlined in the kit to properly install the switch into the furnace. See Figure 7

or Figure 8.

Blocked Drain Pressure Switch (Upflow/Horizontal Installation)

Air Pressure Horn.offal Condensate Pressure

Switch Switch

W,res Mal_l_Prov_e_ V_ip_Hiadr_ss

MountingHolesforHorizon- talCondensateSwitch (use

HorizontaJ Condensate

BlockedDrain Pressure Switch(Kit NAHLO01HK)

Air Pressure_

2 screwsprovided)

CondensateDrainTrap

For horizontal furnace installations, the condensate drain trap

MUST be installed below the furnace. See Figure 9 for dimen-

sions of the drain trap and the proper material to be used. The

drain connection to the condensate trap must also be properly

sloped to an open drain. See Section 5 under "Condensate Drain

Trap and Neutralizer".

The condensate drain trap connects to the drain stub on the left

side of the plastic transition. See Figure 7 and Figure 9. Remove the plastic cap and clamp from the drain stub. Use the 90° com-

pression fitting elbow (provided) to connect the drain trap to the

drain stub. Replace the plastic cap and clamp over the remaining

drain stub (upflow drain stub) on the plastic transition.

Condensate Drain Trap

Drain Stub

Drain Fitting

(3/4" PVC to 1/2" CPVC)

from Transition'_.&

25-22-18

/ T ps,ub

RubberHsse (provided)

Blocked Drain ) Pressure Switch

HorizontalDrainTrap

Installation)

Plastic Transition

DRAIN

Drain Trap

OD CPVC

Compression

Fitting

(Supplied)

25-21-84a

Horizontal Drain

Horizontal Condensate Blocked Drain Pressure

Switch (Kit NAHLOO1HK)

[_ 44001 100201

3. Combustion&VentilationAir

Poison carbon monoxide gas Hazard. Use methods described here to provide combustion

and ventilation air. Failure to provide adequate combustion and ven-

tilation air can result in death and/or personal injury.

Ventingand CombustionAir Check

NOTE: The following information is supplied to allow the installer

to make adjustments to the setup of existing appliances, IF

REQUIRED, based on good trade practices, local codes, and good judgement of the installer. Manufacturer does NOT take re-

sponsibility for modifications made to existing equipment. NOTE: If this installation removes an existing furnace from a

venting system serving one or more other appliances, and to

make sure there is adequate combustion air for all appliances, MAKE THE FOLLOWING CHECK.

1. Seal any unused openings in the venting system.

2. Visually inspect the venting system for proper size and hor- izontal pitch to ensure there is no blockage or restriction,

leakage, corrosion or other deficiencies which could cause an unsafe condition.

3. Insofar as is practical, close all doors and windows and all doors between the space inwhich the appliance(s) remain-

ing connected to the venting system are located and other spaces of the building.

4. Turn on clothes dryers and any appliance not connected to the 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 fireplace dampers.

5. Follow the lighting instructions for each appliance being in- spected. Adjust thermostat so appliance(s) will operate continuously.

6. Allow 5 minutes of main burner operation, then check for spillage at the draft hood relief opening of each appliance.

Use the flame of a match or candle (Figure 10).

Vent Check

Vent Pipe ---_t I A/ Draft Hood

Typical Gas

Water Heate_;_l / ] i _ V'_'-

Match

7. After it has been determined that each appliance vents properly, return doors, windows, appliances etc. to their

normal condition.

8. If improper venting is observed, the cause MUST be cor- rected using the appropriate tables in code books of coun- try having jurisdiction.

NOTE: If flame pulls towards draft hood, this indicates sufficient infiltration air.

NOTE: Non direct vent appliances occupying same enclosed space as furnace MUST have enough air for proper combustion

and ventilation. All duct or openings for supplying combustion and

ventilation air must comply with the gas and electrical codes ofthe

country having jurisdiction.

When the installation is complete, check that all appliances have

adequate combustion air and are venting properly. See Venting

And Combustion Air Check in this manual.

Air Openingsand ConnectingDucts

1. Total input rating for all non direct vent gas appliances MUST be considered when determining free area of open-

ings.

2. Connect ducts or openings directly to outside.

3. When screens are used to cover openings, they MUST be no less than 1/4" (6mm) mesh.

4. The minimum dimension of rectangular air ducts MUST NOT be less than 3" (75mm).

5. When sizing grille or louver, use the free area of opening. If free area is NOT stamped or marked on grill or louver, as-

sume a 20% free area for wood and 60% for metal.

ConfinedSpaceInstallation

NOTE: A confined space is defined as an area with less than 50 cubic feet(1.4m 3) per 1,000 BTUH input rating for all gas ap- pliances installed in the area.

Requirements

1. Provide confined space with sufficient air for proper com- bustion and ventilation of flue gases using horizontal or ver- tical ducts or openings.

2. Figure 11 illustrate howto provide combustion and ventila- tion air. A minimum of two permanent openings, one inlet

and one outlet, are required.

3. One opening MUST be within 12" (300mm) of the floor and the second opening within 12" (300mm) of the ceiling.

4. Size openings and ducts per Table 1.

5. Horizontal duct openings require 1" square (25sq. mm) of free area per 2,000 BTUH of combined input for all gas ap-

pliances in area (see Table 1).

6. Vertical duct openings or openings directly to outside re- quire 1" square (6.5mm 3)of free area per 4,000 BTUH for

combined input of all gas appliances in area (see Table 1).

440 01 100201 [_

Outside Air (This is ONLY a guide. Subject to codes of country having jurisdiction.)

This installation NOT approved in Canada

Gas V

- GableVe_

(1)

SoffitVent

GasVent

MinimumOneInletand OneOutletAir Supplyis Required

InletAir OpeningMustbeWithin12"(300mm)offloor OutletAir OpeningMustbeWithin12"(300mm)ofceiling

(1) 1 SquareInch(6cm2) per4000BTUH (2) 1 SquareInch(6cm2) per2000BTUH

Maybe in andCombinationShown

Inlet Air(1

Free Area

MinimumFree AreaRequiredfor EachOpening

BTUH

input HorizontalDuct

Rating (2,000 BTUH)

50,000 25 sq. in.(161cm.2) 75,000 35.5 sq. in.(242cm.2)

100,000 50 sq. in.(323cm.2) 125,000 62.5sq. in.(403cm.2)

150,000 71 sq. in.(484cm.2)

EXAMPLE: Determining Free Area

Appliance 1 Appliance 2 Total Input

100,000 + 30,000 = (130,000 + 4,000) = 32.5 Sq. In. Vertical

Appliance 1 Appliance 2 Total Input

100,000 + 30,000 = (130,000 + 2,000) = 65 Sq. In. Horizontal

One permanent opening, commencing within 12" (30 cm.) of the

top of the enclosure, shall be permitted where the equipment has

clearances of at least 1" (2.5 cm.) from the sides and back and 6" (16 cm.) from the front of the appliance. The opening shall directly

communicate with the outdoors or shall communicate through a

vertical or horizontal duct tothe outdoors or spaces (crawl or attic) that freely communicate with the outdoors, and shall have a mini-

mum free area of:

1 sq. in per 3000 Btu per hr (7cm. 2 per kW) ofthe total input rating of all equipment located in the enclosure, and

Not less than the sum of the areas of all vent connectors in the confined space.

VerticalDuctoropenings Round

to outside Duct

(4,000BTUR) (4,000

12.5sq. in.(81cm.2) 4"

18.75 sq.in.(121cm.2) 5" 25 sq.in.(161cm.2) 6"

31.25 sq.in.(202cm.2) 7"

37.5sq. in.(242cm.2) 7"

(210 cm.2)

(419 cm 2)

BTUH)

GableVent

Air (1)

Inlet Air(1)

Soft, Vent

Inlet

Air (2)

UnconfinedSpaceInstallation

Poison carbon monoxide gas Hazard. Most homes will require additional air.

An unconfined space or homes with tight construc- tion may not have adequate air infiltration for prop-

er combustion and ventilation of flue gases. Failure to supply additional air by means of ventila-

tion grilles or ducts could result in death and/or

personal injury.

An unconfined space is defined as an area having a minimum vol-

ume of 50 cubic feet(1.4m 3) per 1,000 Btuh total in put rating for all gas appliances in area. Refer to Table 2 for minimum area re- quired.

_ _!i ii _iiJUnconfined Space

BTUH Input

Rating Minimum Area in Square Feet

50,000 312(29m2) 78,000 490(46m2)

114,000 712(66m2) 155,000 968(90m2)

EXAMPLE: NOTE:Square feet is based on 8 foot ceilings.

28,000BTUH X 50CubicFt. = 1,400 = 175Sq. Ft.

1,000 8' Ceiling Height

NOTE: Refer to definitions in section titled Unusually Tight

Construction. If any one of the conditions apply, the space MUST be considered confined space regardless of size.

1. Adjoining rooms can be considered part of an unconfined area if there are openings without doors between rooms.

Minimum Area in Square Feet

[_ 44001 100201

An attic or crawlspace may be considered an unconfined space provided there are adequate ventilation openings di-

rectly to outdoors. Openings MUST remain open and NOT have any means of being closed off. Ventilation openings to outdoors MUST be at least 1"square (25mm 2) of free area

per 4,000 BTUH of total input rating for all gas appliances in area.

Install air intake a minimum of 12" (300mm) above maxi- mum snow level and clear of any obstruction. Duct or ven-

tilation opening requires one square inch of free area per 4,000 BTUH of total input rating for all gas appliances in

area.

Air inlet MUST be screened with not less than 1/4" (6mm) mesh screen.

UnusuallyTight Construction

In unconfined spaces, infiltration may be adequate to provide air

for combustion, ventilation and dilution of flue gases. However, in

buildings with unusually tight construction, additional air MUST

4.VentandCombustionAir Piping

Poison carbon monoxide gas, fire and explo-

sion hazard.

Read and follow all instructions in this section. Failure to properly vent this furnace can result in

death, personal injury and/or property damage.

DualCertifiedFurnace

This furnace is certified as a category IV appliance and is dual certified as a direct vent furnace using outside air for combustion

or it can use air from inside the structure for combustion. The IN- LET air pipe is optional. If combustion air comes from inside the

structure, adequate make up air MUST be provided to compen- sate for oxygen burned. See Confined Space Installation in the Combustion and Ventilation Air chapter. If combustion air is

drawn from outside the structure, it MUST be taken from the same atmospheric pressure zone as the vent pipe.

ContaminatedCombustionAir

Installations in certain areas or types of structures will increase

the exposure to chemicals or halogens that may harm the fur-

nace. The following areas or types of structures may contain or have ex-

posure to the substances listed below. The installation must be evaluated carefully as it may be necessary to provide outside air

for combustion.

• Commercial buildings.

• Buildings with indoor pools.

• Furnaces installed in laundry rooms.

• Furnaces installed in hobby or craft rooms.

• Furnaces installed near chemical storage areas.

• Permanent wave solutions for hair.

• Chlorinated waxes and cleaners.

• Chlorine based swimming pool chemicals.

• Water softening chemicals.

• De-icing salts or chemicals.

be provided using the methods described in section titled Con-

fined Space Installation:

Unusually tight construction is defined as: Construction with

1. Walls and ceilings exposed to the outside have a continu- ous, sealed vapor barrier. Openings are gasketed or

sealed and

2. Doors and openable windows are weather stripped and

3. Other openings are caulked or sealed. These include joints around window and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at

penetrations for plumbing, electrical and gas lines, etc.

VentilationAir

Some provincial codes and local municipalities require ventilation or make-up air be brought into the conditioned space as replace-

ment air. Whichever method is used, the mixed return air temper- ature across the heat exchanger MUST not fall below 60°F (15° c) or flue gases will condense in the heat exchanger. This will short- en the life of the heat exchanger and possibly void your warranty.

• Carbon tetrachloride.

• Halogen type refrigerants.

• Cleaning solvents (such as perchloroethylene).

• Printing inks, paint removers, varnishes, etc.

• Hydrochloric acid.

• Sulfuric Acid.

• Solvent cements and glues.

• Antistatic fabric softeners for clothes dryers.

• Masonry acid washing materials.

Vent and CombustionAir PipingGuidelines

NOTE: All vent piping MUST be installed in compliance with local

codes or ordinances, these instructions, good trade practices, and codes of country having jurisdiction.

1. Determine the best routing and termination for the vent pipe and air inlet pipe by referring to all of the instructions

and guidelines in this Section.

2. Determine the size required for the vent pipe and air inlet pipe.

3. Loosely assemble all venting parts without adhesive (pipe joint cement) for correct fit before final assembly.

4. Use of vertical piping is preferred because there will be some moisture in the flue gases that may condense as it

leaves the vent pipe (See Special Instruction For Horizon-

tal Vents).

5. The vent MUST exit the furnace at the top left side.

6. The vertical vent pipe MUST be supported so that no weight is allowed to rest on the combustion blower.

7. Exhaust vent piping or air inlet piping diameter MUST NOT be reduced.

8. All exhaust vent piping from the furnace to termination MUST slope upwards, away from furnace, a minimum of

1/4" per foot of run (6mm per 300mm).

9. Use DWV type long radius elbows whenever possible, as they provide for the minimum slope on horizontal runs and

they provide less resistance in the vent system. If DWV el- bows cannot be used, use two, 45 degree elbows when

possible. On horizontal runs the elbows can be slightly mis- aligned to provide the correct slope.

440 01 100201 [_

10. All horizontal pipe runs MUST be supported at least every five feet with galvanized strap or other rust resistant materi-

al. NO sags or dips are permitted.

11. All vertical pipe runs MUST be supported every six feet where accessible.

12. The maximum pipe length is 40' (12m) total in the inlet or outlet side of the system. Up to five, 90 ° elbows can be

used on the inlet or the outlet. If more than five elbows are required, reduce the length of both the inlet and exhaust

pipes 5' (1.5m) for each additional elbow used. (See Vent Tables).

13. The minimum pipe run length is 2' (.6m).

14. The piping can be run in the same chase or adjacent to sup- ply or vent pipe for water supply or waste plumbing. It can

also be run in the same chase with a vent from another 90+ furnace.

NOTE: In NO case can the piping be run in a chase where temperatures can exceed 140° F. or where radiated heat from adjacent surfaces would exceed 140° F.

15. The vent outlet MUST be installed to terminate in the same atmospheric pressure zone as the combustion air inlet.

16. The vent system can be installed in an existing unused chimney provided that:

• Both the exhaust vent and air intake run the length of the chimney.

• No other gas fired appliance or fireplace (solid fuel) is vented into the chimney.

• The top of the chimney MUST be sealed flush or crowned up to seal against rain or melting snow so ONLY the piping

protrudes.

• The termination clearances shown in Figure 12 are main- tained.

17. Horizontal furnace applications with vertical vents requir- ing vent diameter increaser fittings must have increaser fit-

tings installed in vertical portion of the vent after a 2" elbow turns upward. Condensate will be trapped in the vent if the

vent diameter is increased prior to having an elbow turned upward. This could cause nuisance tripping of the pressure

switch. (This does not apply to horizontal venting.)

Piping Insulation Guidelines

NOTE: In general, chimneys on an outside wall and attics are ex- posed to cold conditions which can cause the vent pipe to sweat

from condensation. This can lead to moisture damage to living

spaces. It is highly recommended that piping in these cases be insulated to insure proper protection from condensation damage.

Use closed cell, neoprene insulation or equivalent. If Fiberglass or equivalent insulation is used it must have a vapor barrier. Use R

values of 7 up to 10', R-11 if exposure exceeds 10L If Fiberglass

insulation is used, exterior to the structure, the pipe MUST be boxed in and sealed against moisture.

1. Insulate pipe when the exhaust vent passes through an un- conditioned space or raceway.

If situations require pipe to be run on the exterior wall to

reach a suitable termination point, it MUST be properly in- sulated.

3. If it is necessary to insulate piping when an inactive chim- ney is used as a chase, the top of the chimney MUST be

sealed flush or crowned up to seal against rain or melting snow so ONLY the piping protrudes.

4. When the vent or combustion air pipe height above the roof exceeds 30" (760mm), or if an exterior vertical riser is used on a horizontal vent to get above snow levels, the exterior

portion MUST be insulated.

5. When combustion air inlet piping is installed above a sus- pended ceiling, the pipe MUST be insulated with moisture

resistant insulation such as Armaflex or other equivalent type of insulation.

6. Insulate combustion air inlet piping when run in warm, hu- mid spaces such as basements.

SizingCombustionAir andVent Pipe

1. Consult Table 4 to select the proper diameter exhaust and combustion air piping. Exhaust and combustion air piping

is sized for each furnace Btuh size based on total lineal vent length (on inlet or outlet side), and number of 90 ° elbows

required.

1. Single Pipe Installation-If installing as a non-direct vent appliance, (single outlet pipe and no inlet pipe) refer to

Table 3. The table shows the maximum number of elbows allowed with any given pipe diameter and length of run.

2. Double Pipe Installation-If installing as a direct-vent ap- pliance, consult Table 4 to select the proper diameter ex- haust and combustion air piping. Exhaust and combustion

air piping is sized for each furnace Btuh size based on total lineal vent length (on inlet or outlet side), and number of 90°

elbows required.

2. Use of Elbows-Two 45 ° elbows can be substituted for one 90° elbow. The elbow or elbows used for vent termination

outside the structure ARE counted, including elbows need- ed to bring termination above expected snow levels.

EXAMPLE: Refer to, 75,000 Btuh Furnace, Table 4.

• Avent system uses 25' of Inlet pipe and 24' of Outlet pipe. Use

the maximum length found in your system, so 25' is the length to

use in these tables.

• There are 4 elbows on the Outlet and 2 elbows on the Inlet. Use

the 4 elbows row because that is the maximum number of elbows

on any one side (Inlet or Exhaust).

• In this example, combinations C or F are allowed. Using the legend at the bottom of the table, combination C is 3" Inlet with a

21/2'' Exhaust. Combination F is a 3" Inlet with a 3" Exhaust. Ei-

ther combination is allowed together, but they can NOT be mixed.

In other words, part ofa C combination can NOT be used with part of an F combination just because they are listed together in the

same block.

[_ 44001 100201

Pipe Diameter Table

i_ I Pipe Diameter Table

Single Piping ONLY

50,000 & 75,000 Btuh Furnaces

MaxNo.0f Feet of Pipe*

Elbows in

onosi°e 00110141151012024125201303413540

UP TO 5 All combinations use "A" a 2" Exhaust

100,000 Btuh Furnace

Feet of Pipe*

0-9 10-14 15-19 20-24 25-29 30-34 35-40

1 A A A A A A B,C

2 A A A A A B,C B,C 3 A A A A B,C B,C B,C

4 A A A B,C B,C B,C B,C

5 A A B,C B,C B,C B,C B,C

125,000 Btuh Furnace

Feet of Pi >e*

0-9 10-14 15-19 20-24 25-29 30-34 35-40

1 A A B,C B,C B,C B,C C 2 A B,C B,C B,C B,C C C 3 B,C B,C B,C B,C C C C

4 B,C B,C B,C C C C C

5 B,C B,C C C C C C

Possible combination legend: A = 2" Exhaust

B = 21/2" Exhaust C = 3" Exhaust

Elbows are DWV Long Radius Type for 2" and 3" vents. Schedule 40 (sharp radius) for 21/2 `'

If more than five elbows are required, reduce the length of both the inlet and exhaust pipes 5' (1.5m) for each additional

elbow used.

I OTE: It is allowable to use larger diameter pipe and fitting thanshown in the tables but not smaller diameters than shown.

MaxNo.Of Feet of Pipe*

Elbowsin

0neSide_ 0-9 110-14115-19120-24125-29130-34135-40

UP TO 5 All combinations use "A" a 2" Exhaust and 2" Air

0-9 10-14 15-19 20-24 25-29 30-34 35-40

1 A A A A D,B E,B E,B 2 A A A D,B E,B E,B C,F 3 A A D,B E,B E,B C,F C,F 4 A D,B E,B E,B C,F C,F C,F

5 D,B E,B E,B C,F C,F C,F C,F

0-9 10-14 15-19 20-24 25-29 30-34 35-40

1 A A A D,B E,B E,B C,F 2 A A D,B E,B E,F C,F C,F 3 A D,B E,B E,F C,F C,F C,F 4 D,B E,B E,F C,F C,F C,F C,F

5 D,B E,F C,F C,F C,F C,F C,F

0-9110-14115-10120-24125-20130-34135-40

UP TO 5 All combinations use "F" a 3" Exhaust and 3" Air

Possible combination legend: A = 2" Inlet with a 2" Exhaust

B = 3" Inlet with a 2" Exhaust C = 3" Inlet with a 21/2" Exhaust D = 21/2" Inlet with a 2" Exhaust E = 21/2`'Inlet with a 21/2 " Exhaust

F = 3" Inlet with a 3" Exhaust Elbows are DWV Long Radius Type for 2" and 3" vents.

Schedule 40 (sharp radius) for 21/2"

- Signifies the maximum number of elbows, including the

termination elbow(s), on any one part of the system. Exam-

ple: 4 elbows on the exhaust and 5 elbows on the inlet would

use the chart showing 5 elbows, because 5 is the maximum

number on any one side.

If more than five elbows are required, reduce the length of both the inlet and exhaust pipes 5' (1.5m) for each additional

elbow used.

* Feet of pipe is whichever pipe run is the longest, either inlet

or outlet side.

For "Concentric Termination Kit" Venting table, see "Section 10" in this manual,

Dual Piping ONLY

50,000 Btuh Furnaces

Inlet Pipe

75,000 Btuh Furnace

Feet of Pipe*

100,000 Btuh Furnace

Feet of Pi )e*

125,000 Btuh Furnace

Feet of Pipe*

Inlet Pipe

Vent Termination Clearances

Poison carbon monoxide gas, fire and explo- sion hazard.

Inlet and outlet pipes may NOT be vented directly above each other.

Failure to properly vent this furnace can result in death, personal injury and/or property damage.

440 01 100201 [_

1. Determine termination locations based on clearances spe- cified in following steps and as shown in Figure 12,

Figure 16, Figure 17, Figure 18.

For "Concentric Termination Kit" clearances, see Figure 45, Figure 46, Figure 47, Figure 48 and Figure 49 in "Section 10"

in this manual.

2. The vent termination must be located at least 12" (300mm) above ground or normally expected snow accumulation

levels.

3. Do NOT terminate over public walkways. Avoid areas where condensate may cause problems such as above

planters, patios, or adjacent to windows where steam may cause fogging.

4. The vent termination shall be located at least 4' (1220mm) horizontally from any electric meter, gas meter, regulator, and any relief equipment. These distances apply ONLY to

U.S. installations.

5. The vent termination is to be located at least 3' (914mm) above any forced air inlet located within 10' (3m) ; and at

least 10' (3m) from a combustion air intake of another ap- pliance, except another direct vent furnace intake.

6. In Canada, the Canadian Fuel Gas Code takes prece- dence over the preceding termination instructions.

Vent Termination Clearances

(United States Only)

In Canada See Canadian Fuel Gas Code

OtherThan

DirectVent

Terminal

Direct Vent

Termi_lal

50,000 Btuh

or less

Other Than

DirectVent ForcedAir

Terminal 12" Inlet

DirectVent Terminal

MoreThan 50,0008tub

OtherThan DirentVent

10-11-36

CondensateDrainTrap and Neutralizer

This furnace removes both sensible and latent heat from the com- bustion flue gases. Removal of latent heat results in condensation

of flue gas (water vapor). This condensed water vapor drains from

the secondary heat exchanger, through a built-in drain trap tran-

sition, and out of the unit. Condensate line can exit from the right side, left side, or rear of the cabinet.

NOTE: The 90° compression fitting elbow (provided), requires the drain line to be 1/2" (13mm) CPVC* ( 5/8" OD). 5/8" (16mm) I.D.

vinyl tubing may be used outside the furnace cabinet to connect to the drain line. Internal trap assembly provides the required 4" wa-

ter column, so no additional trap is required. * Make sure the 1/2" CPVC is 5/8" OD as there is also a sched-

ule 40 available that will not work.

1. Do NOT put a loop in the drain piping. This would cause an extra water column pressure in addition to the pressure in-

side the built-in drain trap.

2. Drains must terminate at an inside drain to prevent freezing of condensate and possible property damage.

3. Consideration MUST be given to type of filter being installed. A 125,000 Btuh furnace may require

2-16"x25"x1" filters(one on each side of furnace). This configuration does NOT allow the condensate drain line to

be run out the side of furnace. If line MUST be run out the side, an optional standoff filter rack with one 20"x25"x1 "fil-

ter is needed. Install optional filter rack on side of furnace opposite the side where condensate drain line will exit.

4. A condensate or sump pump MUST be used if required by local codes, or if no indoor floor drain is available. A con-

densate neutralizer cartridge must be used if the pump is not approved for use with acidic condensate. Neutralizer

cartridges MUST be installed in the drain line in a horizontal position ONLY.

5. A plugged condensate drain line or a failed condensate pump will allow condensate to spill. If the furnace is

installed where a condensate spill could cause damage, then it is recommended that an auxiliary safety switch be

installed to prevent operation of the equipment in the event of pump failure or plugged drain line. If used, an auxiliary

safety switch should be installed in the R circuit (low volt- age) ONLY.

6. Install an overflow line if routing to floor drain or sump pump. See Figure 1 or Figure 2 for example of proper

routing and installation of overflow line.

7. Install an overflow line if routing to floor drain or sump pump. See Figure 1 for example of proper routing and

installation of overflow line.

Frozen water pipe hazard. When activated an auxiliary safety switch wil cause

a furnace not to operate. During freezing temperatures the water pipes in

your home could freeze and burst causing water

damage to the home. Do not leave the home unattended during freezing

temperatures, or shut off the water supply and

drain the pipes before leaving.

Condensate DrainTrap FreezeProtection

Special precautions MUST be made if installing furnace in an area which may drop below freezing. This can cause improper op- eration or damage to the equipment. If the the furnace environ- ment has the potential of freezing, the drain trap and drain line must be protected. Use 3 to 6watt per foot at 115 volt, 40° F self-

regulating shielded and waterproof heat tape. Wrap the drain trap and drain line with the heat tape and secure with the ties. Follow

the heat tape manufacturer's recommendations.

Connecting Furnaceand Piping

Poison carbon monoxide gas hazard. Cement or mechanically seal all joints, fittings, etc.

to prevent leakage of flue gases.

Failure to properly seal vent piping can result in death, personal injury and/or property damage.

1. Preassemble the exhaust and combustion air piping from the furnace to the vent termination. Do NOT cement any joints together until the preassembly process is complete.

[_ 44001 100201

VentPipe Connection

Install the vent pipe to the combustion blower using the flexible coupling and clamps (provided). On the downflow models remove the three screws holding the vent collar to

the top panel. Remove the vent collar. Remove the two screws in the chase tube. Squeeze the chase tube together

and slide the chase tube through the top panel. The blower snout is now accessible for installing the ABS pipe. See Figure 13, Figure 14, or Figure 15. Reassemble in re- verse order.

Vent Trap and Furnace Connections (Upflow)

Vent pipe MUST be installed with the flexible coupling and clamps (supplied) at the com-

bustion blower.

RTV sealant used to join

Air Inlet Pipe to Combustion Air Inlet.. See Figure 6.

Proper Sealing Procedure for

Combustion Blower

Vent Pipe

Clamps_

Blower_

25-21-86

Condensate compression fitting can be turned to exit out the left

side, rig ht side, or rear of cabinet. If piping is exiting out the right

side of cabinet, it is necessary to use an elbow to run pipe in front

of electronic module. Cabinet entrance hole is offset enough to

allow adequate clearance.

Rubber Coupling

440 01 100201 [_

Vent Trap and Furnace Connections (Downflow)

Vent pipe MUST be installed with flexible coupling and

clamps (supplied) at the com-

bustion blower.

Chase Tube

Horizontal Drain Stub (Left side only)

RTV sealant used to join Ail Inlet Pipe to Combustion

Inlet..

Downflow Drain

Vent Pipe

Air Intake Pipe

2" to 2 1/2" or 3" Adaptor

required (Field Supplied)

2" Plastic Pipe (Field Supplied)

Condensate compression fitting can be turned to exit out the

side or right side (downflow).

Reducer Bushing (Supplied)

Air Inlet Pipe Connection

NOTE: Air Inlet Collar is sized for 3" PVC pipe. If2" (50mm) or 2

1/2" (64mm) combustion air piping is used, a 3" (75mm) to 2" (50mm) or 3" (75mm) to 2 1/2" (64mm) reducer fitting is required.

The reducing section can be before the 90° elbow in a horizontal section.

1. On the downflow models, install 3" to 2" pipe/reducer fitting (supplied) to the inlet collar using RTV sealant ONLY to provide for future serviceability.

2. On the downflow models, connect 2" plastic pipe into the fitting using RTV sealant ONLY. Pipe must be long enough

to extend outside the furnace casing.

NOTE: Ifclearance is limited above the furnace, use two pieces of pipe joined (RTV only) with a coupling to reach from the Combus-

tion Air Box to outside of casing.

3. Connect required size Air Intake Pipe using coupling or adaptor as required, using RTV sealant ONLY to provide

for future serviceability.

Joining Pipe and Fittings

Fire hazard. Provide adequate ventilation and do NOT

assemble near heat source oropen flame. Do NOT smoke while using solvent cements and avoid contact with skin or eyes.

Observe all cautions and warnings printed on material containers to prevent possible death, personal injury and/or property damage.

This furnace is approved for venting with Schedule 40 PVC, CPVC, ABS, Cellular Core pipe fittings and SDR-26 PVC.

NOTE: SDR pipe is not approved for use in Canada.

NOTE: All PVC, CPVC, ABS, and Cellular Core pipe fittings, sol-

vent cement, primers and procedures MUST conform to Ameri-

can National Standard Institute and American Society for Testing and Materials (ANSI/ASTM) standards.

• Pipe and Fittings -ASTM D1785, D2241, D2466, D2661, D2665, F-891, F-628

• PVC Primer and Solvent Cement - ASTM D2564

• Procedure for Cementing Joints - Ref ASTM D2855

NOTE: Inorder to create a seal that allows future removal of pipe, RTV sealant MUST be used on the inlet pipe where it joins to the

furnace. PVC, CPVC, ABS, and Cellular Core pipe and cement

may be used on all other joints.

CAUTION

Do NOT use solvent cement that has become curdled, lumpy or thickened and do NOT thin. Observe precau-

tions printed on containers. For applications below

32 ° F., use only low temperature type solvent cement.

1. Cut pipe end square, remove ragged edges and burrs. Chamfer end of pipe, then clean fitting, socket and pipe

joint of all dirt, grease, or moisture.

NOTE: Stir the solvent cement frequently while using. Use a natu- ral bristle brush orthe dauber supplied with the cement. The prop-

er brush size is one inch.

2. After checking pipe and socket for proper fit, wipe socket and pipe with cleaner-primer. Apply a liberal coat of primer

to inside surface of socket and outside of pipe. Do NOT al- low primer to dry before applying cement.

3. Apply a thin coat of cement evenly in the socket. Quickly apply a heavy coat of cement to the pipe end and insert

pipe into fittings with a slight twisting movement until it bot- toms out.

NOTE: Cement MUST be fluid while inserting pipe. If NOT, recoat pipe.

4. Hold the pipe in the fitting for 30 seconds to prevent the ta- pered socket from pushing the pipe out of the fitting.

[_ 44001 100201

5. Wipe all excess cement from the joint with a rag. Allow 15 minutes before handling. Cure time varies according to fit,

temperature and humidity.

ConnectingVent PipesandTermination

NOTE: Combustion air intake and vent MUST terminate in the same atmospheric pressure zone. If installation is in a cold cli-

mate (sustained temperatures below 0°F), increase the minimum distance between vent pipe and air intake from 8" to 18".

CAUTION

Maintain a minimum of 36" (lm) between combustion air inlet and clothes dryer vent. Terminate the combus- tion air intake as far as possible from any air condition- er, heat pump, swimming pool, swimming pool pumping, chorlinator or filtration unit.

Poison carbon monoxide gas hazard. Inlet and outlet pipes may NOT be vented

directly above each other Failure to properly vent this furnace can result in

death, personal injury and/or property damage.

HorizontalTermination

1. Cut two holes. 21/2" (67mm) for 2" (50mm) pipe, 3"(75mm) for 21/2,,(67mm) pipe, or 31/2,,(90mm) for 3" (75mm) pipe.

Do NOT make the holes oversized, or itwill be necessary to

add a sheet metal or plywood plate on the outside with the correct size hole in it.

2. Check hole sizes by making sure it is smaller than the cou- plings or elbows that will be installed on the outside. The

couplings or elbows MUST prevent the pipe from being pushed back through the wall.

3. Extend vent pipe and combustion air pipe through the wall 3/4" to 1"(19 to 25mm) and seal area between pipe and

wall.

4. Install the couplings, nipple and termination elbows as shown and maintain spacing between vent and combus-

tion air piping as indicated in Figure 16 through Figure 18.

_ :i i Sidewall Termination with Exterior

_1 _ Risers to Get Above Snow Level or

Grade Level

8" * "18" Minimum for coJd cJimates

MiN. "_ _ (substained below0 ° F)

/// 20' J /.MAX j

Install all couplings, nipples and elbows using proper pro- cedures for Joining Pipe and Fittings and maintain spac-

ing between vent and combustion air piping as indicated in Figure 16 through Figure 13.

Sidewall Termination 12" or More Above Snow Level or Grade Level

8" * (substained below 0 ° F)

MIN.

"18" Minimum for cold ctimates

VerticalTermination

Figure 18 shows the proper installation and clearances for vertical vent termination. The vertical roof termination

should be sealed with a plumbing roof boot or equivalent flashing. The inlet of the intake pipe and end of the exhaust

vent must be terminated no less than 12" (300mm) above the roof or snow accumulation level, and 12" (300mm)

away from a vertical wall or other protrusion.

If the vent system is installed in an existing chimney make sure clearances shown in Figure 18 are maintained. Hori-

zontal section before the termination elbow can be ex- tended on the inlet air to provide necessary clearance.

440 01 100201

__ 25=00=G4F

Using Exterior Risers

1. Install elbows and pipe toform riser as shown inFigure 17.

2. Secure vent pipe to wall with galvanized strap or other rust resistant material to restrain pipe from moving.

3. Insulate pipe with Armaflex or equivalent moisture resis- tant closed cell foam insulation or Fiberglass insulation if boxed in and sealed against moisture.

Rooftop Termination

A = 12"Above roof or snow accumulation level

B = 8" Min., 20' Maximum, except in areas with extreme

cold temperatures (sustained below0°F), the 18" Min.

Optional Vent Screens

To prevent unwanted pests or foreign material from entering ter-

minated pipes, plastic vent screens are available in 2" and 3"

sizes(checkpartslist).Useofthesescreensisrecommendedex- ceptincoldclimateareaswhereiceislikelytoformonthem.Use

RTVsealantONLYonthescreeninsidetheterminationelbowus- ingpipecement.Screensshouldbeinspectedmonthlyforblock-

ageandcleanedyearlypriortostartup.

VentTermination Shielding

Under certain wind conditions some building materials may be af-

fected by flue products expelled in close proximity to unprotected

surfaces. Sealing or shielding of the exposed surfaces with acor- rosion resistant material (such as aluminum sheeting) may be re- quired to prevent staining or deterioration. The protective material should be attached and sealed (if necessary) to the building be-

fore attaching the vent terminal. A metal shield is recommended 18" x 18" (457mm x 457mm) min.

or 18" (457mm) min. diameter around the vent termination at the exterior wall to protect the house exterior materials from flue prod- uct or condensation (freezing) damage.

MultiVent TerminationClearances

When two (2) or more furnaces are vented near each other, each furnace must be individually vented.

Concentric Vent and Combustion-

Air Roof Termination

Figure 20, Figure 21, Figure 22and Figure 23, but the next vent

termination must be at least 36" away from first 2 terminations. It

is important that vent terminations be made as shown to avoid re- circulation of flue gases.

Sidewall Inlet Vent and Exhaust-

Air Termination

8" Min.

8"Min. 20' Max.

18" Min. for

Cold Climates

12" Min. Grade /_

or Snow Level

(Substained BeLow 0° F)

-/ Dimension "A" is touching or2" maximum separation.

Sidewall Inlet Vent and Exhaust-Air

Termination with Exterior Risers

18" Min. for Cold Ci|mates

8" Min.

12" Min. Grade or Snow Level

Combustior

Air

Dimension "A" is touching or 2" maximum separation.

Concentric Vent and Combustion-

Air Sidewall Termination

Exhaust

Vent 25-22-02d

Dimension "A" is touching or 2" maximum separation.

When two (2) or more furnaces are vented near each other, two

(2) vent terminations may be installed as shown in Figure 19,

12" Min. Grade or

Snow Level

Inlet Snow Level

Dimension "A" is touching or 2" maximum separation.

Rooftop Inlet Vent and Exhaust-

Air Termination

18" Min, for Cold Climates

(Substained Below 0° F)

Inlet 20' Max.

8" Min,

Exhaust

12"Min,

Grade or

25-22-43

[_ 44001 100201

5. GasSupplyandPiping

Poison carbon monoxide gas, fire and explosion hazard.

Models designated for Natural Gas are to be used with Natural Gas Only, unless properly converted to use with LP gas.

Failure to properly vent this furnace can result in death, personal injury and/or property damage.

NOTE: The rating plate is stamped with the model number, gas

type and gas input rating. In addition, models manufactured for

sale in Canada have orifice size information stamped on the rat- ing plate.

SupplyPressure

Fire hazard. Do NOT set input rating above that shown on

rating plate.

Failure to properly set input pressure can result in

death, personal injury and/or property damage.

1. Supply pressure can be checked using the 1/8"(3.2mm ) NPT port on the supply side of the gas valve.

2. Gas input to burners MUST NOT exceed the rated input shown on rating plate.

3. Do NOT allow minimum gas supply pressure to vary down- ward. Doing so will decrease input to furnace. Refer to

Table 6 for normal gas supply and manifold pressures.

Gas Pressures Above 2000'

AlternateBTUHInput Ratings(USA Only)

The input rating of these furnaces can be changed from the stan- dard input rating to the alternate input rating shown in Table 5, by changing the main burner orifices. Changing of burner orifices MUST be done by a qualified service technician. See section on changing orifices.

_le5 Alternate Input Ratings, USA ONLY.

BTUH BTUH Natural LP

Standard Alternate Gas Gas

Rating Rating Orifice Orifice

50,000 40,000 #44 #55

75,000 60,000 #44 #55 100,000 80,000 #44 #55 125,000 100,000 #44 #55

Gas

Type

Natural 4.5" 3.5"

• If Propane gas has a different BTU content, orifices

• Measured input can NOT exceed rated input.

• Combustion Air Box Cover MUST be removed when

• Any major change in gas flow requires changing burn-

Recommended Max.

(1.7 kPa) (3.5 kPa)

LP 11" 10"

(2.7 kPa) (3.5 kPa)

With Propane gas, the rated input is obtained when the

BTU content is 2,500 BTU per cubic foot and manifold pressure set at 10" W.C.

MUST be changed by licensed Propane installer.

adjusting manifold pressure.

er orifice size.

Supply Pressure

Min. Pressure

7" 14"

(1.1 kPa) (0.9 kPa)

11" 14"

(2.7 kPa) (2.5 kPa)

Important Notes

MANIFOLD PRESSUREAND ORIFICESIZE FOR HIGH ALTITUDE APPLICATIONS

H`i_HiHiH`iHi`_`iHiHiHiHiHiHiHiHiHiHiHiHiHiHH`iHH`iHH`iHH`iHH`iHH`iHH`iHH`iHH`iHH`iHH`i.....

Heat Value

Btu!Cu.Ft. 0-1999 2000-2999 3000-3999 4000-4999 5000-5999 6000-6999 7000-7999

800 3.5 3.5 3.5 3.5 3.5 3.5 3.5 850 3.5 3.5 3.5 3.5 3.5 3.5 3.5

900 3.5 3.5 3.5 3.5 3.5 3.5 3.4

950 3.5 3.5 3.5 3.5 3.3 3.2 3.1 1000 3.5 3.4 3.3 3.2 3.0 2.9 2.8 1050 3.2 3.t 3.0 2.9 2.7 2.6 2.5

1100 2.9 2.8 2.7 2.6 2.5 2.4 2.3

Orifice Size #42 #42 #42 #42 #42 #42 #42

(".wc) (" .wc) (".wc) (" .wc) (" .wc) (".wc) (" .wc)

NATURAL GAS

ElevationAbove Sea Level

Manifold

ManifoldGas PressureAdjustment

NOTE: Gas supply pressure MUST be within minimum and maxi-

mum values listed on rating plate. Pressures are usually set by gas suppliers.

440 01 100201 [_

Make adjustment to manifold pressure with burners operating and combustion air box cover removed.

1. Remove combustion air box cover.

Connect manometer to the tapped opening on the outlet

2 ChangingOrificesfor HighAltitude

side of gas valve or on the manifold pipe. Use manometer with a 0-min.12" water column range.

Turn gas ON, fire the furnace and remove adjustment screw cover on gas valve.

Turn counterclockwise to decrease pressure and clock- wise to increase.

5. Set pressure to value shown in Table 6. Refer to Important Notes in Table 6. Pressure is also listed on furnace rating

plate.

6. When pressure is set, replace adjustment screw cover on gas valve.

Electrical shock, fire or explosion hazard. Turn OFF electric power (at disconnect) and gas

supply (at manual valve in gas line) when installing orifices. Installation of orifices requires

a qualified service technician. Failure to properly install orifices can result in

death, personal injury and/or property damage.

7. Replace combustion air box cover.

NOTE: Main burner orifices can be changed for high altitudes.

NOTE: Adjustment screw cover MUST be replaced on gas valve BEFORE reading manifold pressure and operating furnace.

General DeratingRules

1. Disconnect gas line from gas valve.

2. Remove combustion box front cover and manifold from fur- Dace.

3. Remove the orifices from the manifold and replace them

For operation with natural gas at altitudes above 2,000', orifice change and/or manifold pressure adjustment may

with properly sized orifices.

4. Tighten orifices so it is seated and gas tight. Figure 24.

be required to suit gas supplied. Check with gas supplier. If orifice sizing is needed, it should be based on reducing the

input rating by 2% (natural) or 4% (LP) for each 1,000'

Changing Orifices

above sea level. See Table 7 and Figure 24 for required pressure change and/or orifice change for high altitudes.

For operation with LP gas at altitudes above 2,000', gas ori- fices MUST be changed and manifold pressure MUST be

Measure from face of orifice

to the back side of the

manifold.

maintained as per Table 6. Orifice sizes for 0-2000' above sea level are #54. 2000-7000' above sea level, use #55. 7000-8000' above sea level, use #56 orifices. Orifices can

be ordered through your distributor.

HighAltitudeAir PressureSwitch

Altitudes over 4,000' require a different air pressure switch than the one installed at the factory. Check parts list for pressure switch

and consult your distributor for part number and availability. In Canada, provincial codes may govern installation of switch. Check with governing authorities.

Typical Gas Piping for Upflow

Drip Leg and Union, Union* should be outside the cabi-

net. Manual shut-off

valve MUST be up- stream of dripleg,

union, and furnace.

LP Low

pressure switch. 0

tional on some models.

t,ll" = (28.2mm) t.21" = (30.amm)

5. Reinstall manifold and combustion air box cover. Ensure burners do NOT bind on new orifices.

Air Intake Pipe

'Direct-Vent

Installation only)

Use elbows to connect valve to

piping when us-

ht side

gas pipe entry.

25-20-73

* Union may be installed inside the cabinet when necessary because of clearances.

[_ 44001100201

NaturalGas InputRatingCheck

NOTE: The gas meter can be used to measure input to furnace.

Rating is based on a natural gas BTU content of 1,000 BTU's per cubic meter. Check with gas supplier for actual BTU content.

1. Make sure combustion air box cover is in place and closed before performing the following steps.

2. Turn OFF gas supply to all appliances and start furnace.

3. Time how many seconds it takes the smallest dial on the gas meter to make one complete revolution. Refer to Ex-

ample.

Typical Gas Piping for Downflow

Drip Leg and Union, Union* should be outside the cabinet. Manual

shut-off valve MUST be up- stream of dripleg, union,

and

LP Low pressure switch. Optional LP

conversion'X

Example

NaturalGas | No.ofSeconds TimePerCubic | BTUPer

BTUContent t PerHour FootinSecondst Hour1,000 3,600 48 75,000

1,000 x 3,600 +48 = 75,000 BTUH

4. Relight all appliances and ensure all pilots are operating.

NOTE: If meter uses a 2 cubic foot dial, divide results (seconds) by two.

Air Intake Pipe

Direct-Vent Installation only)

Optional Gas Line Entrance. Use when furnace has been

Jconverted to LP gas and LP

Low Pressure Switch is used.

*Union may be installed inside the cabinet when necessary because of clearances.

GasPiping Requirements

Properly size gas pipe to handle combined appliance load or run gas pipe directly from gas meter or LP gas regulator. Refer to NFGC and ANSI Z223.1 for proper gas pipe size.

2. Install correct pipe size for run length and furnace rating.

3. Measure pipe length from gas meter or LP second stage regulator.

NOTE: Refer to Figure 25 or Figure 26 for the general layout at

the furnace. The rules listed apply to natural and LP gas pipe

installations. NOTE: Refer to Figure 25 for the general layout at the furnace.

The rules listed apply to natural and LP gas pipe installations.

4. Use black iron or steel pipe and fittings or other pipe ap- proved by local code.

5. Use ground joint unions and install adrip leg no less than 3" long to trap dirt and moisture before it can enter gas valve.

6. Use two pipe wrenches when making connections to pre- vent gas valve from turning.

7. Install a manual shut-off valve external to furnace casing and tighten all joints securely.

Additional LP Connection Requirements

1. Have a licensed LP gas dealer make all connections at storage tank and check all connections from tank to fur-

nace.

25-21-13

2. Ifcopper tubing is used, it MUST comply with limitation set in National Fuel Gas Code or CGA codes.

3. Two-stage regulation of LP gas is recommended.

FinalCheck

1. The furnace and its individual shut-offvalve must be discon- nected from the gas supply piping system during any pres-

sure testing of that system at test pressures in excess of 1/2" PSIG (3.5 kPa).

The furnace must be isolated from the gas supply piping system by closing its individual manual shut-off valve dur- ing any pressure testing of the gas supply piping system at

test pressures equal to or less than /2" PSIG (3.5 kPa).

2. Test all pipes for leaks.

Gas pressure MUST NOT exceed 1/2" PSIG to gas valve. Checking gas piping above 1/2"PSIG requires the furnace

and manual shut-off valve to be disconnected during test- ing.

4. Apply soap suds (or a liquid detergent) to each joint. Bubbles forming indicate a leak.

5. Correct even the smallest leak at once.

6. If orifices were changed, make sure they are checked for

leakage.

440 01 100201 [_

6. ElectricalWiring

Electrical shock hazard.

Turn OFF electric power at fuse box or service pan- el before making any electrical connections and

ensure a proper ground connection is made before connecting line voltage.

However, the electronic air cleaner is NOT energized during con-

tinuous fan operation controlled by the electronic fan control.

Fan Control

The fan control is preset at the factory with an adjustable blower ON delay of 30 seconds in the heating mode. The blower OFF tim- ing is preset at 140 seconds. If desired, the fan ON delay and OFF delay can be reset to obtain the longest delay times while still maintaining comfort levels. See "Furnace Wiring Diagram".

Failure to do so can result in death, personal injury

and/or property damage.

PowerSupplyWiring

The furnace MUST be electrically wired and grounded in accor- dance with local codes, or inthe absence of local codes, the appli- cable national codes.

Field wiring connections must be made inside the furnace con- nection box. A suitable strain relief should be used at the point the

wires exit the furnace casing.

Copper conductors must be used. Line voltage wires should be sized for the input amps stated on the rating plate. Furnace should be connected to its own separate circuit.

Thermostat

Thermostat location has an important effect on the operation of

the unit. Follow instructions included with thermostat for correct

mounting and wiring. Low voltage connections to furnace must be made on terminal

board to fan control. Set thermostat heat anticipator in accordance with the Technical

Support Manual.

Optional Equipment

All wiring from furnace to optional equipment MUST conform to

local codes or, in the absence of local codes, the applicable na-

tional codes. Install wiring in accordance with manufacturer's

instructions.

Humidifier/ElectronicAir Cleaner

The furnace is wired for humidifier and/or electronic air cleaner connection.

CAUTION

Do NOT exceed 115V/0.8 amp. maximum current load for both the EAU terminal and the HUM terminal com-

bined.

NOTE: The humidifier will be powered when the furnace is fired and the circulating air blower comes on. The electronic air cleaner

will be powered anytime the thermostat calls for air movement.

Fan Delay DIP switch Settings

COOL ON DELAY: 30 SEC. COOL OFF DELAY: 30 SEC.

HEAT OFF DELAY HEAT ON DELAY

60SEC 100SEC 140SEC 180SEC 60SEC 30SEC

NOTE: Itis recommended to achieve maximum efficiency that the

fan control be set to turn on at 30 seconds after the burners light.

Electrical Connections for Upflow

Air IntakePipe

(Direct-Vent Installationonly)

115V. 60Hz.

BOX

NOTE: Junction Box can be mounted to either the left or

right side.

LOW VOLTAGE

TERMINAL BOARD

I I

t I

@ _ERMOSTAT

25-20-72

[_ 44001 100201

iii// iiiiiii i i ii iE,ectrica,Connectionsfor

Downflow

Air Intake Pipe

(Direct-Vent Installation only)

ControlCenterFuse

The 24V circuit contains a 5-amp, automotive-type fuse located

on control center. (See Figure 29) Any electrical shorts of 24V wiring during installation, service, or maintenance may cause fuse to blow. If fuse replacement is required, use only a fuse of

identical size (5 amp.)

Fan Timer Connections

__ CC_NEG'flON

_ "_ERMOSTAT

Junction box can _

to either theleft or rightside to accommodate line wiring.

7. DuctworkandFilterfor (Upflow/Horizontal)(NTGM/GNK)

3. For furnaces installed without a cooling coil it is recom- mended that the outlet duct be provided with a removable

access panel. This panel should be accessible when the

Poison carbon monoxide gas hazard.

Do NOT draw return air from inside a closet or util- ity room. Return air duct MUST be sealed to fur-

nace casing. Failure to properly seal duct can result in death,

personal injury and/or property damage.

furnace is installed so the exterior of the heat exchanger can be viewed for inspections. The access panel MUST be

sealed to prevent leaks.

4. If separate evaporator and blower units are used, install good sealing dampers for air flow control. Chilled air going

through the furnace could cause condensation and shorten the furnace life.

NOTE: Dampers (field supplied) can be either automatic or manual. Manually operated dampers MUST be equipped with a means to prevent furnace or air conditioning operation unless damper is in the full heat or cool position.

Fuse

25-22-68

Installation

NOTE: Design and install air distribution system to comply with

Air Conditioning Contractors of America manuals and/or NFPA

pamphlets 90A and 90B or other approved methods that conform

to local codes and good trade practices.

When furnace supply ducts carry air outside furnace area, seal return air duct to furnace casing and terminate duct

outside furnace space.

Install air conditioning cooling coil (evaporator) on outlet side of furnace.

44001100201

Poison carbon monoxide gas hazard. Cool air passing over heat exchanger can

cause condensate to form resulting in heat ex- changer failure.

This could result in death, personal injury and/ or property damage,

Connections

NOTE: Return air can enter through either side, both sides, or the bottom. Return air can not enter through rear of the furnace.

Whenthefurnaceislocatedinanareanearoradjacenttotheliv-

ingarea,thesystemshouldbecarefullydesignedwithreturnsto minimizenoisetransmissionthroughthereturngrille.Anyblower movingahighvolumeofairwillproduceaudiblenoisewhich couldbeobjectionabletowhentheunitislocatedveryclosetoliv- ingareas.Itisadvisabletoroutethereturnairductsunderthe

floororthroughtheattic.

1. Forsideconnectionsusinga16"x25"filter,cutouttheem- bossedareashowninFigure30.Thiswillprovidea141/2"

x221/2"approximateopening.

SideReturnAir Cutout

HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

= 141/2"Height of Cutout for 16" x 25" Filter j

221/2"Width of Cutout for 16" x 25" Filte_

Embossed Area on Side of Furnace

11>

Furnace Bottom

Filters

A Filter must be used:

Filters are not supplied with these furnaces, but can be purchased

from dealer.

Use either filter type:

• Washable, high velocity filters are based on a maximum air flow rating of 600 FPM.

• Disposable, low velocity filters are based on a maximum air flow of 300 FPM when used with filter grille.

NOTE: Disposable, low velocity filters may be replaced with

washable, high velocity filter providing they meet the minimum

size areas. Washable, high velocity filters can be replaced ONLY

with same type and size.

Side Mou nted Filter Rack

/d °

/ I

NOTE: A 125,000 Btuh furnace requires two side returns or abot-

tom return for 5 tons cooling. If two side returns are used it does

NOT allow the condensate drain line to be run out the side of fur- nace. If line MUST be run out the side, an optional standoff filter

rack with one 20x25x1 filter is needed. Install optional filter rack on side of furnace opposite the side where condensate drain line

will exit.

Bottom returns can be made by removing the knockout panel in the furnace base. Do NOT remove knock-out ex-

cept for a bottom return. A 20" x 25" filter can be used for a bottom return for a100,000 Btu hfurnace. A 25" x25" filter is required for 125,000 Btuh furnaces.

An optional 20"x 25" duct standoff (NAHAOO1TK) is avail- able to be used in lieu of one filter on each side of furnace.

Installation of locking-type dampers are recommended in all branches, or in individual ducts to balance system's air

flow.

5. Non-combustible, flexible duct connectors are recom- mended for return and supply connections to furnace.

6. If air return grille is located close to the fan inlet, install at least one, 90 ° air turn between fan and inlet grille to reduce noise.

NOTE: To further reduce noise, install acoustical air turning vanes and/or line the inside of duct with acoustical material.

Sizing

Existing or new ductwork MUST be sized to handle the correct amount of airflow for either heating only or heating and air condi-

tioning.

Insulation

1. Insulate ductwork installed in attics or other areas exposed to outside temperatures with a minimum of 2" insulation

and vapor barrier.

2. Insulate ductwork in indoor unconditioned areas with a minimum of 1" insulation with indoor type vapor barrier.

25-20-90

Filter Installation usingOptional Filter Rack

When installing or removing a bottom mounted filter, slide the two

side filter clips to the back of the fu mace BEFORE installing or re-

moving. This will allow the filter to clear the front raised edge ofthe furnace. Insert filter into side clips first and push filter back until it is fully engaged into back clip. When filter is in place, slide clips back

into place midway on filter as shown in Figure 32.

Bottom Mounted Filter Rack

....... _ J

_iiiiiiiiiiiiiiiiiiiiiiii%

AW3192

Slide filter clips towards back before removing

Refer to Figure 33 and Figure 34 for guidelines to install filters.

Furnaces which require larger filter media and have limited clear-

ances on one side of furnace, require a standoff filter rack, see

Figure 33, available from your distributor.

CAUTION

If filters are only suitable for heating application, ad- vise homeowner that filter size may need to be in-

creased if air conditioning is added.

[_ 44001 100201

AdditionOf AirConditioning

When a refrigeration coil is used in conjunction with this unit, it

must be installed on the discharge side of the unit to avoid con- densation on the heat exchanger. The coil installation instructions must be consulted for proper coil location and installation proce- dures. With a parallel flow arrangement, dampers must be installed to prevent chilled air from entering the furnace. If manu- ally operated dampers are used, they must be equipped with a means to prevent operation of either unit unless the damper is in

full heat or full cool position. A 3" (75mm) clearance is required on the right side of the furnace

in order to run the condensate drain line. Copper, iron or plastic

tubing may be used for the condensate drain line.

Filters Installed on Two Sides

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

Stando,Filter.aok

8. DuctworkandFilterfor (DownflowlHorizontal)(NCGMIGCK)

It is recommended for furnaces installed without a cooling

coil that the outlet duct be provided with a removable ac-

Poison carbon monoxide gas hazard. Do NOT draw return air from inside a closet or utility

room. Return air duct MUST be sealed to furnace casing. Failure to properly seal duct can result in death, personal

injury and/or property damage.

cess panel. This panel should be accessible when the fur- nace is installed so that the heat exchanger can be viewed

for inspections. The access panel MUST be sealed to pre- vent leaks.

NOTE: Dampers (field supplied) can be either automatic or

manual. Manually operated dampers MUST be equipped with a

means to prevent furnace or air conditioning operation unless

damper is in the full heat or cool position.

25-21-45

Installation

Poison carbon monoxide gas hazard.

NOTE: Design and install air distribution system to comply with

Air Conditioning Contractors of America manuals and/or NFPA

pamphlets 90A and 90B or other approved methods that conform

to local codes and good trade practices.

When furnace supply ducts carry air outside furnace area, seal return air duct to furnace casing and terminate duct

outside furnace space.

Install air conditioning cooling coil (evaporator) on dis- charge side of furnace.

If separate evaporator and blower units are used, install good sealing dampers for air flow control. Chilled air going

through the furnace could cause condensation and shorten the furnace life.

440 01 100201 [_

Cool air passing over heat exchanger can cause con-

densate to form resulting in heat exchanger failure. This could result in death, personal injury and/or prop-

erty damage.

Connections

NOTE: Return air can enter through the top of the furnace only. When the furnace is located in anarea near or adjacent to the liv-

ing area, the system should be carefully designed with returns to

minimize noise transmission through the return grille. Any blower

moving a high volume of air will produce audible noise which

could be objectionable to when the unit is located very close to liv-

ing areas. It is advisable to route the return air ducts between

floors or through the attic.

1. Installation of locking-type dampers are recommended in all branches, or in individual ducts to balance system's air

flow.

2. Non-combustible, flexible duct connectors are recom- mended for return and supply connections to furnace.

3. If air return grille is located close to the fan inlet, install at least one, 90 ° air turn between fan and inlet grille to reduce noise.

NOTE: To further reduce noise, install acoustical air turning vanes and/or line the inside of duct with acoustical material.

Sizing

Existing or new ductwork MUST be sized to handle the correct amount of airflow for either heating only or heating and air condi-

tioning.

Insulation

1. Insulate ductwork installed in attics or other areas exposed to outside temperatures with a minimum of 2" insulation

and vapor barrier.

2. Insulate ductwork in indoor unconditioned areas with a minimum of 1" insulation with indoor type vapor barrier.

HorizontalFiltersand SupplyDuctInstallation

For horizontal furnace applications it is necessary to install fil-

ter(s) in an accessible location in the return air system. In such a

case, the filter(s) should be of equivalent size and style as origi- nally supplied with the furnace.

For horizontal furnace applications, four field supplied angles are required to connect the supply duct to the furnace. See Figure 35. Size the metal angles to match the supply opening of

the furnace. See Figure 4 for supply air dimensions.

Supply Duct Flanges

size areas. Washable, high velocity filters can be replaced ONLY

with same type and size.

Filter Installation

The filters supplied with the furnace may be installed inthe return air plenum above the furnace. A filter rack is supplied with each

furnace. See Figure 36.

Filter Rack Installation

NOTE: The return air plenum MUST extend a sufficient height above dimension "A" (Figure 37) to provide for the attachment of a return air duct or grille above the filters.

1. Insert end of filter rack with 3/4" (19mm) flange into slot in the back of the unit. See Figure 36.

2. With filter rack pushed back, insert front end with 1/4"(6mm ) flange into position and push into front slot. with

filter rack pushed as far forward as it will go, bend 1/4"(6mm ) flange and 3/4"(19mm ) flange up 90°. See

Figure 36.

3. Filters can only be installed through the right hand side of the unit blower opening. Slide filter into unit until it is in posi-

tion to be pushed up and over into place on the left hand side of unit. See Figure 37.

NOTE: Plenum must be fitted as close to the return air flange of

the unit as possible to eliminate any air bypassing the filters.

These instructions are stated for a person standing in front and

facing the furnace, right will be to your right.

Filter Installation

-88

A=14,

DownflowFilters

NOTE: The size and type(s) of filter supplied with the furnace will handle the airflow required if central air conditioning is used with

the furnace.

Use either filter type:

• Washable, high velocity filter based on a maximum air flow rating of 600 FPM.

• Disposable, low velocity filter based on a maximum air flow of 300 FPM when used with filter grille.

NOTE: Disposable, low velocity filters may be replaced with

washable, high velocity filter providing they meet the minimum

[_ 44001 100201

(350mm)

25 21 16

4. Slide remaining filter into unit and up into place on right hand side of unit. See Figure 37.

Ifthere is insufficient plenum height for this type of installation, fil-

ters may be installed in any accessible location in the return air

system. In such a case, the filters should be at least the equivalent size and type as originally supplied with the furnace.

Filter Removal

NOTE: These instructions are stated for a person standing in front and facing the furnace, right will be to your right.

1. Remove blower compartment door.

2. Reach up above right side of blower and lift dirty filter up and out of rack at top of furnace.

3. Straighten up filter and pull straight down at side of blower. Pull straight out through door opening.

4. For left filter, reach up and across, straighten up filter and move across and down right side.

5. Vacuum clean or wash with warm water and dry thoroughly before replacing. Reinstall in reverse order.

AdditionOf Air Conditioning

When a refrigeration coil is used in conjunction with this unit, it

ally operated dampers are used, they must be equipped with a

means to prevent operation of either unit unless the damper is in

full heat or full cool position.

DownflowFurnaceInstallation Non-CombustibleFloorInstallation

Fabricate a plenum to the dimensions given in Figure 4, for the

furnace outlet. Plenum should be flanged, approximately 3/4" for

support.

1. Position plenum through the floor and set the furnace over the opening in the floor. If necessary, grout around the base

to seal air leaks between the base and the floor.

CombustibleFloorInstallation

Subbase for CombustibleFloor

The Subbase for Combustible Floors MUST be used when a downflow furnace is set on a combustible floor, even when the fur-

nace is installed on a coil box.

1. Cut the opening in the floor according to Table 8. The hole in the floor must be cut to the dimensions listed in Table S

since the base isequipped with locating tabs that center the base over the opening.

The opening in the base is 11/4" (32mm) shorter and 11/8" (29mm) narrower than the recommended size of the opening in the floor. This is done to maintain clearance between the floor and the ple-

num.

2. Fabricate the plenum to the dimensions given in Table 8. Note that the dimensions given are outside dimensions.

i i!ii iii i ii ii iii!iiii!iiii!iii!ii!ii!ii

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Subbase for Combus-

tible Floors Part Num-

Furnace Subbase

NAHH002SB NAHH003SB

NAHH007SB

Subbase for Coil Cabinets

NAHH005SB NAHH006SB NAHH008SB

* Outside Dimension ** Base Spacer Side To Side

ber

Equivalents

In. (mm)

Subbases for Combustible Floors Dimensions

Subbase for Combustible

Floor Dimensions

H* J* K** L

195/16 283/4 183/16 16

2215/16 283/4 2113/16 16

269/16 283/4 257/16 16

195/16 209/16 183/16 16

2215/16 209/16 2113/16 16

269/16 209/16 257/16 16

195/16 = 491 183/16 = 462

2215/16= 563 283/4 = 730 2t13/16 = 554 16 = 406

269/16 = 694 209/16=522 257/16 = 646

3. Set the base over the opening in the floor, centering it over the opening. Fasten the base to the floor with screws or

nails. See Figure 38, Figure 39 and Figure 40.

Opening In Floor

M N

161/4 t81/4 161/4 217/8 161/4 251/2

161/4 t81/4 161/4 217/8

161/4 251/2

181/4=464

161/4=412 217/8=556

251/2=647

Opening In Base

For

Plenum

P R

15 171_ t 5 193_ 15 247_

15 171_ 15 193_

15 247_

171/8= 435

15=38t 193/4= 502

24_8= 619

Typical

Plenum

Dimensions

S T

15 171/8 t 5 193/4 15 243/6

15 171/8 15 193/4

15 243/8

t71/8= 435

15= 381 t93/4= 502

243/8=619

4. Drop the plenum through the opening in the base. The flange of the plenum should rest on top of the subbase.

5. Position furnace or coil cabinet and furnace on subbase so it aligns between the locating tabs.

440 01 100201 I_

Furnace Subbase

Setting the Subbase

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

H j

Combustible

A = 4 1/4" Minimum clearance from beck of hole

to wall or other obstruction.

Coil Cabinet Subbase

Plenum

Floor Base

25-20-46

Insulation of

Furna

Combustible

Floor Bas

_ _ __Wood Floor

Wood Scre_L _/_" _ Plenum 25-20-46a

This subbase for combustible floors has been designed so that

the height of the subbase raises the downflow coil off the floor to

allow easy installation of the condensate drain. See Figure 41.

Condensate Line Raised by Base

25-20-52

25-20-46b

A = 4 !/4" Minimum clearance from back of hoIe to wall or other obstruction

9. ChecksandAdjustments

The furnaces with greater than 1600 CFM requires that both left and right side returns are used in side return applications. Two 16"

x 25" high velocity filters and racks are provided with furnace. Fil-

ter racks must be mounted externally. If return air must be on one

side only, an optional 20" x 25" filter standoff rack kits can be used. (See Figure 33) For bottom return, an optional 20" x25"

filter rack kit can be mounted internally.

Startup

NOTE: Refer to the "Operating Instructions Label" with furnace dor start-up procedure.

CAUTION

If any sparks, odors or unusual noises occur, immediately shut OFF power to furnace. Check for wiring errors or ob- struction to blower.

[_ 44001 100201

GasSupplyPressure

Gas supply pressure should be within minimum and maximum

values listed on rating plate. Pressures are usually set by gas sup-

pliers.

ManifoldGas PressureAdjustment

NOTE: Make adjustment to manifold pressure with burners oper- ating.

Fire or explosion hazard.

Turn OFF gas at shut off before connecting manometer.

Failure to turn OFF gas at shut off before connecting manometer can result in death, personal injury and/or property damage.

1. With gas OFF, connect manometer to tapped opening on gas valve or on manifold tap. Use manometer with a 0to 12

inches water column range.

2. Turn gas ON and remove adjustment screw cover on gas valve. Turn counterclockwise to decrease pressure and

clockwise to increase.

3. For altitudes up to 2000', set pressure to value shown in Table 6, _+0.3" (8mm) water column. For altitudes of 2000'

to 8000', see Section 6 for correct pressure valve.

Adjust PilotBurner

The furnace has a pilot flame to light the main burner. The flame should surround 3/8" to 1/2" of the flame rod. See Figure 42. To

adjust, remove cap from pilot adjusting screw on gas valve. Turn screw counterclockwise to increase or clockwise to decrease

flame as required. Replace cap for adjusting screw.

Pilot Burner

Main Burner

Burner Face

10-10-78

TemperatureRise Check

The blower speed MUST be set to give the correct air temperature rise through the furnace as marked on the rating plate. Tempera-

ture rise isthe difference between supply and return air tempera-

tures.

To check temperature rise,use the following procedure:

1. Place thermometers in supply and return air registers as close to furnace as possible, avoiding direct radiant heat

from heat exchangers.

2. Operate furnace continuously for 15 minutes with all regis- ters and duct dampers open.

3. Take reading and compare with range specified on rating plate.

4. Ifthe correct amount oftemperature rise is NOT obtained, it may be necessary to change blower speed. A higher blow- er speed will lower the temperature rise. A lower blower

speed will increase the temperature rise.

ChangingBlowerSpeed

10-11-65

Main BurnerFlameCheck

Allow the furnace to run approximately 10 minutes then inspect the main burner and pilot flames. See Figure 43.

Check for the following (Figure 43):

• Stable and blueflames. Dust maycause orange tips orwisps of

yellow, but flames MUST NOT have solid, yellow tips.

• Flames extending directly from burner intoheat exchanger.

• Flames do NOT touch sides of heat exchanger

If any problems with main burner flames are noted, it may be nec- essary to adjust gas pressures, or check for drafts.

Electrical shock hazard.

Turn OFF power to furnace before changing speed taps.

Failure to do so can result in death and/or personal in-

jury.

NOTE: The speed taps that the manufacture sets from the factory

for this product are based on a nominal 400 CFM per ton cooling

and the basic mid range on the temperature rise for heating. Since the manufacturer cannot establish the static pressure that

will be applied to the unit, it is the responsibility of the installer

dealer/contractor to select the proper speed taps for the applica-

tion when the unit is installed.

If it is necessary to change speeds, refer to steps below.

1. RefertoFumaceWiringDiagramforlocationoftheheating and cooling speed taps located on the electronic fan control

as well as location of unused blower motor speed leads.

Use the chart (Table 9) to determine the blower motor

speed settings.

440 01 100201 [_

Blower Speed Chart

Wire Color

Black

Orange*

Blue Red

Motor Speed

High

Med-High

Medium

Low

* Med-High speed may not be provided on all models.

Change the heat or cool blower motor speed by removing the motor lead from the "Heat" or "Cool" terminal and re-

place it with the desired motor speed lead from the "Un- used Motor Lead" location. Connect the wire previously

removed from the "Heat" or "Cool" terminal to the vacated "Unused Motor Lead" terminal.

If the same speed must be used for both heating and cool- ing, remove the undesired motor speed lead from the

"Heat" or "Cool" terminal and con nect that lead to the open terminal at "Unused Motor Lead" location. Attach a jump-

er between the "Heat" and "Cool" terminals and the re- maining motor speed lead.

Note: For motors with (4) speed leads, itwill be necessary to tape off the terminal of the motor speed lead removed

from the "Heat" or "Cool" terminal with electrical tape since an open terminal will not be available at the "Unused Mo-

tor Lead" location.

ContinuousFanOperation

A terminal is provided on the electronic fan control located in the

circulating blower compartment for operation of the continuous

fan option. This connection is intended for the low speed motor tap, and has a lower contact rating (8 amps) than the heat and

cool taps. When the low speed blower lead is connected to this terminal, this will provide low speed blower operation whenever the other two speeds (Heat or Cool) are not energized.

Thoroughly check the system after modification to ensure the

proper operation of the circulating air blower in all modes of opera- tion.

Separatespeed selectionsfor Heat, Cool, and

Continuous Fan

Connect low speed lead from circulating motor to the "Cont." ter-

minal at the electronic fan control. The appropriate motor leads

should already be connected to the "Heat" and "Cool" terminals.

Heating and Continuous BlowerSpeedthe Same

If it is necessary to operate the heating speed and continuous

blower speed using the same blower speed, connect a jumper be- tween the "Heat" and "Cont." terminals on the electronic fan con-

trol.

Note: There should be only ONE motor lead going to the "Heat"

and "Cont." terminals.

10.FurnaceMaintenance

CAUTION

It is recommended that the furnace be inspected and serviced on an annual basis (before the heating sea-

son) by a qualified service technician.

11.ConcentricTermination

VentTermination Clearances

Poison carbon monoxide gas, fire and explo-

sion hazard.

Inlet and outlet pipes may NOT be vented directly above each other (standard vent terminals).

Failure to properly vent this furnace can result in death, personal injury and/or property damage.

Determine termination locations based on clearances spe- cified in following steps and as shown in Figure 8,

Figure 45, Figure 46, Figure 47, Figure 48 and Figure 49.

The vent termination must be located at least 12" (300mm) above ground or normally expected snow accumulation

levels.

See "User's Information Manual".

3. Do NOT terminate over public walkways. Avoid areas where condensate may cause problems such as above

planters, patios, or adjacent to windows where steam may cause fogging.

4. The vent termination shall be located at least 4' (1220mm) horizontally from any electric meter, gas meter, regulator,

and any relief equipment. These distances apply ONLY to

U.S. installations.

5. The vent termination is to be located at least 3' (914mm) above any forced air inlet located within 10' (3m) ; and at least 10' (3m) from a combustion air intake of another ap-

pliance, except another direct vent furnace intake.

6. In Canada, the Canadian Fuel Gas Code takes prece- dence over the preceding termination instructions.

ConcentricVentTermination- Kit# NAHAOO1CV

This kit is for vertical or horizontal termination of the combustion air inlet and the exhaust vent pipes on Category IV gas-fired con-

densing furnaces. The kit can be used for 2" (50mm), 21/2" (67mm) and 3"(75mm) diameter pipe systems. Both the combus-

tion air inlet and the exhaust vent pipes must attach to the termina- tion kit. The termination kit must terminate outside the structure

and must be installed per the instructions outlined below for verti- cal or horizontal termination. Vertical termination is preferred.

[_ 44001 100201

Field supplied pipe and fittings are required to complete the instal- lation.

Concentric Vent Dimensional Drawing

Kit Components

Kit Contents:

3" Rain Cap 4" Diameter SDR-26 Pipe, 371/8" Long

21/2" Diameter SDR-26 Pipe, 24" Long 3" Y Concentric Fitting 4" Dia.

Pipe

Y Concentric Fitting SDR-26 Pipe

21/2" Dia.

Rain Cap

25-22-03

Vertical& HorizontalTermination

Determine the pipe diameters required for the installation from Table 10, and Figure 46.

Determine the best location for the termination kit. See Figure 45 for vertical termination or Figure 48 and

Figure 49 for horizontal termination. Roof termination is preferred since it is less susceptible to damage, has re-

duced intake contaminants and less visible vent vapor. For side wall termination, consideration should be given to: 1)

possible damage from the vapors to plants/shrubs, other equipment and building materials, 2) possible damage to

the terminal from foreign objects, 3) wind effects that may cause recirculation of flue products, debris or light snow and 4) visible vent vapor.

Concentric Vent Roof Installation

Vent Maintain 12" min. clear-

z_ ance above highest antici-

pated snow level. Max. of

Combustion Air

Roof Boot/ Flashing

(Field Supplied)

3" x 2" Bushings or 3" x 21/2" Bushings

If 3" vent not 45° Elbow (Field supplied) Supplied)

Note: Vent

Support must be field installed to secure ter- Combustion

ruination kit to structure. Air 25-22-0;

Cut one 5" (127mm) diameter hole through the structure.

Dimension D may be lengthened to 60" max. or shortened by cutting the pipes to 12" min. Dimension A will change ac- cording to D dimension.

24" above roof.

(Field Supplied)

3" Dia. PVC

_41/2" Dia.

11/2 _-3" Dia.

PVC Intake/Combustion Air

317_" --

A = 463/4"

25-22-03

3" Concentric Termination Kit

_O NAHA001CV Venting Table Dual Piping

ONLY

50,000 Btuh Furnaces

No.ofEIbows 0-9' 10-14' 15-t9' 20-24' 25-29' 30-34' 35-40'

1 A A A A A A A

2 A A A A A A B

3 A A A A A B B

4 A A A A B B B

75,000 Btuh Furnace

1 A D,B E,B E,B C,F C,F C,F

2 D,B E,B E,B C,F C,F C,F F

3 E,B E,B C,F C,F C,F F F

4 E, B C,F C,F C,F F F F

100,000 Btuh Furnace

1 D,B E,B E,F C,F C,F C,F C,F

2 E,B E,F C,F C,F C,F C,F F

3 E,F C,F C,F C,F C,F F F

4 C,F C,F C,F C,F F F F

125,000 Btuh Furnace

1 F F F F F F F

2 F F F F F F F

3 F F F F F F F

4 F F F F F F F

Possible combination legend:

A = 2" Inlet with a 2" Exhaust

B = 3" Inlet with a 2" Exhaust C = 3" Inlet with a 21/2" Exhaust

ED=21/2" Inlet with a 2" Exhaust

- 21/2" Inlet with a 21/2" Exhaust

F = 3" Inlet with a 3" Exhaust

1. Do not include the field supplied 45 ° elbow in the total elbow count.

2. If more than four elbows are required, reduce the length of both the inlet and the exhaust pipes five feet for each additional

elbow used.

3. Elbows are DWV long radius type for 2" and 3" vents; sched- ule 40 (sharp radius) for 21/2" .

Ifassembly needs to be extended to meet height or side wall thick- ness requirement, the two pipes supplied in the kit may be re- placed by using the same diameter solid, single (no coupling connections) field supplied SDR-26 PVC (ASTM D2241) pipes.

Do not extend dimension D more than 60". (See Figure 46)

440 01 100201 [_

Partially assemble the concentric vent termination kit. Clean and cement the parts using the procedures for Join-

ing Pipe and Fittings section of the manual. A) Cement the Y Concentric fitting to the 4" (102mm) diameter kit pipe. (See Figure 47) B) Cement the 3" (76mm) rain cap to the 21/2', (mm) diameter kit part. (See Figure 47) NOTE: A

field supplied stainless steel screw may be used to secure the rain cap to the pipe instead of cementing when field dis-

assembly is desired for cleaning (See Figure 47)

Rain Cap to Vent Pipe Assembly

Drillclearance hole in rain

cap andpilot hole in vent pipe.

Install the Y concentric fitting and the pipe assembly

through the structure's hole. Forvertical termination, install the parts through the field supplied roof boot/flashing.

NOTE: De not allow insulation or other materials to accu- mulate inside the pipe assembly when installing through

the structure's hole.

Secure the assembly to the structure as shown in Figure 45 or Figure 49 using field supplied metal strap-

ping or equivalent material. NOTE: Ensure the termination height is above the roof sur-

face or anticipated snow level as shown in Figure 45 for vertical termination. Ensure the termination location clear-

ance dimensions are as shown in Figure 48 and Figure 49 for horizontal termination.

Concentric Vent and Combustion-

Air Side Termination

Roof Overhang

12" min. J-

Stainlesssteel screw (Field supplied)

Poison carbon monoxide gas hazard.

When using the alternate screw assembly

method, drill a clearance hole in the rain cap and

a pilot hole in the vent pipe for the screw size

being used. Failure to drill adequate holes may

cause cracking of the PVC components, allowing flue gases to be recirculated.

Failure to follow this warning could result in

death, personal injury and/or property damage.

Poison carbon monoxide gas hazard. Do not operate the furnace with the rain cap

removed as recirulation of the flue gases may

occur. Water may also collect inside the larger combustion air pipe and flow to the burner

enclosure.

Failure to follow this warning could result in

death, personal injury and/or property damage.

Maintain 12" clearance above high- est anticipated snow level or grade whichever is greater. 25-22-02

Concentric Vent Sidewall

Attachment

3",x 2" Bushings or Strap _1 3 x21/2 ' Bushings (Field Supplied) _// Combustion

If3' vent not used _ ___________Air (Field supplied) X_/i_/qq'--..

/ Ve_i_ _>

_'_ --_ _--4J./ Vent

_Zj'_-I-=--FIushto

Co bustion \ 1"max.

Air 45° Elbow _

Note: (FieldSupplied) Securing strap must befield installed to prevent movement of ter-

mination kit inside wall. 25-22-02

8. Install the rain cap and the small diameter pipe assembly in the Y concentric fitting and the large pipe assembly. En-

sure that the small diameter pipe is bottomed out and se- curely cemented in the Y concentric fitting.

9. Cement the furnace combustion air and vent pipes to the concentric vent termination assembly. See Figure 45 or

Figure 49 for proper pipe attachment.

10.Operate the furnace through one heat cycle to ensure com- bustion air and vent pipes are properly connected to the

concentric termination connections.

[_ 44001 100201

ICP GNK050N12A3, GNK075N14A3, GNK100N16A3, NTGM050EFA3, NTGM075EGA3 Installation Guide

Specifications and Main Features

Frequently Asked Questions

User Manual