ICP C8MPT050B12A1, C8MPT075F14A1, C8MPT075F14B1, C8MPT100F14A1, C8MPT100F14B1 Installation Guide

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80+ GAS FURNACE

Category I Furnace

*8MPT Two-Stage Heating

*8MPV Variable Speed, Two-Stage Heating & Supports

Two- Stage Cooling Units * Denotes Brands (C, R, T)

See Section 5 for Category ! definition.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or

other conditions which may cause death, personal injury, or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory-authorized kits

or accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when

installing. Follow att safety codes. Wear safety glasses, protective clothing, and work gloves. Use quenching cloth for brazing

operations. Have fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions

included in literature and attached to the unit. Consult local building codes, the current editions of the National Fuel Gas

Code (NFCG) NFPA 54/ANSI Z223.1, and the National Electrical Code (NEC) NFPA 70.

In Canada refer to the current editions of the National standards of Canada CAN/CSA-B149.1 and .2 Natural Gas and Propane Installation Codes, and Canadian Electrical Code CSA C22.1.

Recognize safety information. This is the safety-alert symbol z_. When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand these signal words; DANGER, WARNING, and CAUTION. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will

result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage.

NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

International Comfort Products, LLC

Lewisburg, TN.37091

1.SafeInstallationRequirements.................. 4

2.Installation................................. 5

3.SideVenting................................ 8

4.Combustion&VentilationAir ................... 9

5.GasVentInstallation ......................... 12

6.HorizontalVenting ........................... 13

7.ChimneyAdapterVenting...................... 15

8.GasSupplyandPiping........................ 18

9.ElectricalWiring............................. 22

ELECTRIC SHOCK HAZARD Failure to follow this warning

could result in personal injury and/or death.

Turn Off All Power Before Servicing.

Table of Contents

INSTALLER: Affix these instructions on or

adjacent to the furnace. CONSUMER: Retain these instructions for

future reference.

10. Ductwork and Filter (Upflow/Horizontal) ......... 25

11. DuctworkandFilter(Downflow) ............... 27

12. ChecksandAdjustments .................... 30

13. FurnaceMaintenance....................... 33

14. SequenceofOperation&Diagnostic(*8MPT) ..... 34

15. WiringDiagram(*8MPT) ..................... 36

16. SequenceofOperation&Diagnostic(*8MPV) ..... 37

17. WiringDiagram(*8MPV) ..................... 39

18. ThermostatWiringGuide .................... 40

CARBON MONOXIDE POISONING AND FIRE HAZARD.

Failure to follow this warning could result in personal injury, death and/or property dam- age.

This furnace is not designed for use in mobile

homes, trailers or recreational vehicles.

Portions of the text and tables are reprinted from NFPA 54 / ANSi Z223.1-2006@, with permission of National Fire Protection Association, Quincy, MA 02269 and American Gas Association Washington DC 20001. This reprinted material is not the complete and official position of the NFPA or ANSi on the referenced subject which is represented only by the standard in its

entirety.

Specificationsare subject to changewithout notice 44101 202301 March2009

START-UP CHECK SHEET

For PSC Models *8MPT

(This sheet is optional. Keep for future reference.)

Date of Start-Up:.

Dealer Name:

Address:

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

Phone:

Owner Name:

Address:

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

Model Number:

Serial Number:

Setup Checks

Calculated Input (BTU) Rate: (See Checks and Adjust- ments Section).

Heating Check Measured Line Pressure During High Heat: Measured Manifold Pressure: High Heat

Low Heat

Temperature of Supply Air:

Temperature of Return Air: Temperature Rise (Supply - Return): High Heat __

In Rise Range (see furnace rating plate)?

Static Pressure (Ducts) High Heat:

The Blower Speed Tap used for:

Optional Check:

Cooling Check

High Heat Low Heat

Low Heat

Supply Return

High Heat Low Heat CO?

CO2?

Check the box when task is complete.

All Electrical Connections Tight? Lj

Manual Gas Shut-off Upstream of Furnace/Drip LegLU

Gas Valve turned ON? Lj

Type of Gas: Natural: Lj LP: Lj

Filter Type and Size:

Shade in Heating Fan "Time OFF" Setting and Thermo- stat Type setting:

SWl

44101 202301 Specifications are subject to change without notice 2

Temperature of Supply Air: Temperature of Return Air: Temperature Difference:

Static Pressure (Ducts) Cooling:

Dealer Comments:

Supply Return

CoolingThe Blower Speed Tap used for:

START-UP CHECK SHEET

For Variable Speed Models *8MPV

(This sheet is optional. Keep for future reference.)

Date of Start-Up:.

Dealer Name:

Address:

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

Phone:

Owner Name:

Address:

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

Model Number:

Serial Number:

Calculated Input (BTU) Rate: (See Checks and Adjust- ments Section).

Heating Check Measured Line Pressure During High Heat:

Measured Manifold Pressure: High Heat

Low Heat

Temperature of Supply Air:

Temperature of Return Air: Temperature Rise (Supply - Return): High Heat __

In Rise Range (see furnace rating plate)?

Static Pressure (Ducts) High Heat: Supply

Optional Check:

High Heat Low Heat

Low Heat

Return CO?

Setup Checks

Check the box when task is complete.

All Electrical Connections Tight? Lj

Manual Gas Shut-off Upstream of Furnace/Drip Leg[--]

Gas Valve turned ON? Lj

Type of Gas: Natural: Lj LP: Lj

Filter Type and Size:

Shade in Final Furnace Settings Below:

SW1 [_

123

I=a D D el J; _-_ AC/HPEfficiencyBLOWER ADJUST HP Comfort

w2looooooDo1

1 234 5 678

liP mode

select

Cooling Check

Temperature of Supply Air: Temperature of Return Air:

Temperature Difference: Static Pressure (Ducts) Cooling:

Dealer Comments:

CO2?

Supply Return

3 Specificationsare subject to changewithout notice 44101 202301

1. Safe Installation Requirements

Seal around supply and return air ducts.

FIRE, EXPLOSION, AND

CARBON MONOXIDE

POISONING HAZARD Improper adjustment,

alteration, service,

maintenance or installation could result in personal injury, death and/or property damage.

Installation or repairs made by unqualified persons could 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 agency that is

experienced in such work, is familiar with all precautions and safety procedures required in such work, and is equipped with the proper tools and test

instruments.

NOTE: This furnace is design-certified by the CSA International

(formerly AGA and CGA) for installation in the United States and

Canada. Refer to the appropriate codes, along with this manual, for proper installation.

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

• Install this furnace only in a location and position as speci- fied in "Installation" of these instructions.

• Provide adequate combustion and ventilation air to the furnace as specified in "Combustion and Ventilation Air" of

these instructions. Combustion products must be discharged outdoors. Con-

nect this furnace to an approved vent system only, as spe- cified in "Combustion and Ventilation Air, Horizontal Venting and Chimney Adapter Venting" of these instruc-

tions. Never test for gas leaks with an open flame. Use a com-

mercially available soap solution made specifically for the detection of leaks to check all connections, as specified in "Gas Supply and Piping, Final Gas Piping Check" of these

instructions.

• Always install furnace to operate within the furnace's in- tended temperature-rise range with a duct system which has an external static pressure within the allowable range, as specified in "Technical Support Manual" of these in-

structions. See furnace rating plate. C.

• When a furnace is installed so that supply ducts carry air circulated by the furnace to areas outside the space con-

taining the furnace, the return air shall also be handled by 1. aduct(s) sealed to the furnace casing and terminating out-

side the space containing the furnace.

• A gas-fired furnace for installation in a residential garage 2. must be installed as specified in "Installation" of these in-

structions.

• This furnace is not to be used for temporary heating of buildings or structures under construction. See "Installa- tion", item 10.

• This furnace is NOT approved for installation in mo-

bile homes, trailers or recreation vehicles.

Install correct filter type and size.

Unit MUST be installed so electrical components are pro-

tected from direct contact with water.

SafetyRules

Your unit is built to provide many years of safe and dependable service providing itis properly installed and maintained. However,

abuse and!or improper use can shorten the life of the unit and create hazards for you, the owner.

The U.S. Consumer Product Safety Commission encourages

installation of carbon monoxide alarms. There can be various

sources of carbon 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.

Carbon monoxide can cause serious bodily injury and/or death. Carbon monoxide or "CO" is a colorless and odorless

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

Therefore, to help alert people of potentially dangerous car-

bon monoxide levels, you should have a commercially avail-

able carbon monoxide alarm that is listed by a nationally

recognized testing agency in accordance with Underwriters Laboratories Inc. Standard for Single and Multiple Station

Carbon Monoxide Alarms, ANSl/UL 2034 or the CSA 6.19-01

Residential Carbon Alarming Devices installed and main- tained in the building or dwelling concurrently with the gas- fired furnace installation (see Note below). The alarm should

be installed as recommended by the alarm manufacturer's

installation instructions.

There can be numerous sources of fire or smoke in a building or dwelling. Fire or smoke can cause serious bodily injury, death, and/or property damage. Therefore, in order to alert

people of potentially dangerous fire or smoke, you should

have fire extinguisher and smoke alarms 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 alarms

and makes no representations regarding any brand or type of alarms.

Toensure safe and efficient operation ofyour unit, you should do the following:

Thoroughly read this manual and labels on the unit. This wilt help you understand how your unit operates and the haz- ards involved with gas and electricity.

Do not use this unit if any part has been under water. Im- mediately 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 provide air to the unit. Air must be provided for proper combustion

and ventilation of flue gases.

44101 202301 Specifications are subject to change without notice 4

FrozenWaterPipe Hazard Ifyour furnace remains off for an extended time, the pipes in your

WATER DAMAGE TO PROPERTY HAZARD Failure to protect against the risk of freezing could

result in property damage. Do not leave your home unattended for long periods

during freezing weather without turning off water supply and draining water pipes or otherwise

protecting against the risk of frozen pipes and resultant damage.

Your furnace isdesigned solely to provide a safe and comfortable living environment. The furnace is NOT designed to ensure that

water pipes will not freeze. It is equipped with several safety de- vices that are designed to turn the furnace off and prevent it from restarting in the event of various potentially unsafe conditions.

home could freeze and burst, resulting in serious water damage. Ifthe structure wilt be unattended during cold weather you should

take these precautions.

Turn off the water supply to the structure and drain the water

lines if possible and add an antifreeze for potable water to drain traps and toilet tanks. Open faucets in appropriate

areas.

-or-

2. Have someone check the structure frequently during cold

weather to make sure it is warm enough to prevent pipes from freezing. Instruct them on a service agency to call to

provide service, if required.

-or-

3. Install a reliable remote sensing device that wilt notify

somebody of freezing conditions within the home.

2. Installation

Do NOT install furnace directly on carpeting, tile or other com- bustible material other than wood flooring.

CARBON MONOXIDE POISONING HAZARD Failure to properly vent this furnace or other

appliances could result in personal injury or death. If this furnace is replacing a previously common-

vented furnace, it may be necessary to resize the existing vent system to prevent oversizing

problems for the other remaining appliances(s). See Venting and Combustion Air Check in the Gas

Vent Installation section of this instruction.

Locationand Clearances

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

ing location based upon the minimum clearance and furnace di- mensions (Figure 1).

CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in

personal injury or death. Do NOT operate furnace in a corrosive atmosphere

containing chlorine, fluorine or any other damaging chemicals, which could shorten furnace life.

Refer to Combustion & Ventilation Air section, Contaminated Combustion Air for combustion air

evaluation and remedy.

InstallationRequirements

1. Install furnace level.

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

ings or structures under construction.

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

Install the vent pipes as short as practical. (See Gas Vent Installation section).

5 Specifications are subject to change without notice 44101 202301

Maintain clearance for fire safety and servicing. A front clear-

ance of 24" (610 mm) is minimum for access to the burner, controls and filter. See clearance requirements in Figure 1.

Use a raised base ifthe floor isdamp or wet at times.

Residential garage installations require:

Burners and ignition sources installed at least 18" (457 mm)

above the floor.

Furnace must be located or physically protected from pos-

sible damage by a vehicle.

If the furnace is to be suspended from the floor joists in a

basement or a crawl space or the rafters in an attic, it is nec- essary to use steel pipe straps or an angle iron frame to rigidly attach the furnace to prevent 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.

10. This furnace may be used for construction heat provided that: The furnace is permanently installed with all electrical

wiring, piping, venting and ducting installed according to these installation instructions. A return air duct is pro- vided, sealed to the furnace casing, and terminated out-

side the space containing the furnace. This prevents a

negative pressure condition as created bythe circulating

air blower, causing a flame rollout and/or drawing com-

bustion products into the structure.

The furnace is controlled by a thermostat. It may not be "hot wired" to provide heat continuously to the structure

without thermostatic control. Clean outside air is provided for combustion. This is to

minimize the corrosive effects of adhesives, sealers and other construction materials. It also prevents the en- trainment of drywall dust into combustion air, which can cause fouling and plugging of furnace components.

The temperature of the return air to the furnace is main- tained between 55 ° F (13 ° C) and 80° F (27 ° C), with no evening setback or shutdown. The use of the furnace

while the structure is under construction is deemed to be

intermittent operation per our installation instructions. The air temperature rise is within the rated rise range on

the furnace rating plate, and the firing rate has been set to the rating plate value.

The filters used to clean the circulating air during the °

construction process must be either changed or thor- oughly cleaned prior to occupancy.

The furnace, ductwork and filters are cleaned as neces-

sary to remove drywall dust and construction debris from all HVAC system components after construction is com-

)leted.

After construction is complete,verify proper furnace op- erating conditions including ignition, gas input rate, air temperature rise, and venting according to these instal-

lation instructions.

Dimensions and Clearances (*8MPT/*8MPV)

TOP

I , eate *

;iiii!!,i

.... / ......

5 (127)

.......................................................i

LEFT SIDE

(48)

_-_ 265/8 (676) --_

, BOTTOM

i i J

i , /

'_- 231/8 (587) ,_, _- 41/16 (103)

(124)i

(25)

DIMENSIONAL INFORMATION

Furnace I Cabinet Top Bottom I ReturnAir

Capacity 15A/2 1B4 6F 1c I o IOpening3/8126/8

*8MPTN050B (76) (356) (1.4) 1(321) 1 H

*8MPTN075F14 191!8 171/2 73/4 21/8 143/4 [

*8MPT100F14 (486) (445) (54) 1(15) I d

*8MPTN100J20 223/4 211/4 91/2 115/16 183/4 j

I I

(152)

(197)

*8MPTN125J20 (578) (540) (241) (49) (476)

* Denotes Brand

Drawingisrepresentative,butsomemodelsmayvary

24"(610)min,

ALL DIMENSIONS-IN(MM)

1in =25.4 mm

i _te,_

........................A ..............._

-- B "ii

;J :t /

i ......................................................._

in(mm)

COMBUSTIBLE MATERIALS FOR ALL UNITS

REAR 0 FRONT (combustion air openings in 3" (76 mm)

furnace and in structure)

Required For Service

ALL SIDES Of SUPPLY PLENUM

SIDES

VENT

Single Wall Vent 6" (152 mm)

Type B-1 Double Wall Vent 1" (25 mm)

TOP OF FURNACE 1" (25 mm)

*30" (762ram)clearancerecommendedforfurnaceremoval,

Horizontal)osition:Linecontactispermissibleonlybetweenlines

formedby intersectionsoftopand twosidesof furnacejacket,and

buildingjoists,studsorframing,

MINIMUM CLEARANCES TO

*24" (610 ram)

1" (25 mm)

_o, 281/2 (724) ,_ 133/4 (95) _-_ 181/_ 470 _

r_ _ i _ / 3/4 (19)

2 4 /

i ...............................................................................,

(9!o)_

37i

(851)

33 ]i

1) i ...................

14 _ I? 1/4-.......................(57!

(749) 1

291/_ Plugged starting hole 131/4 i i i

(440) to cut side duct opening. (337)

i 1'75/16 ....... i i ;

13/4 .... _

(45) _ (124) 261/2 (673)

NOTE:Evaporator"A" coildrainpan dimensions may vary from furnace ductopening size.Always consultevaporator specificationsfor ductsize requirements.

Furnaceis designedfor bottom return or side return, Returnairthroughback offurnace isNOT allowed.

7 40

(!7a)_ 0o16)

=47/a _ 215/8 (542) i " 17/8 (48)

InstallationPositions

This furnace can be installed in an upflow, horizontal (either teft or right) or downflow airflow position. DO NOT install this furnace on its back. For the upflow position, the return air ductwork can be at- tached to either the left or right side panel and/or the bottom. For horizontal and downflow positions, the return air ductwork must be

attached to the bottom. The return air ductwork must never be at- tached to the back of the furnace.

FurnaceInstallation

Inspect the rating plate to be certain the model number begins with

"*8MPV" or "*8MPT'. This identifies the unit as a multi-position furnace and can be installed in a Upflow, Horizontal Right, Hori- zontal Left or Downflow position.

Upflow

No modifications are required for upflow installation. (See Figure 2)

44101 202301 Specifications are subject to change without notice 6

The horizontal furnaces may be installed directly on combustible

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wood flooring or supports, however, it is recommended for further fire protection cement board or sheet metal is placed between the furnace and the combustible wood floor and extend 12" (305 mm)

beyond the front of the furnace louver door. (This is a recommen-

dation only, not a requirement). This furnace MUST NOT be installed directly on carpeting, tile or

other combustible material other than wood flooring or supports.

Downflow

FIRE HAZARD Failure to install furnace on noncombustible

subbase could result in personal injury, death

Horizontal

If you purchased a multi-position furnace, it can be installed hori- zontally inan attic, basement, crawl space, alcove, or suspended

from a ceiling in a basement or utility room in either a right or left airflow position. (see Figure 3)

Horizontally installed furnaces may be vented out the top of the unit or out the side facing up. See "Side Venting" for instructions

to rotate the vent to the side. The minimum clearances to combustibles MUST be maintained

between the furnace and adjacent construction, as shown in Figure 1. ONLY the corner of the cabinet is allowed to contact the rafters Figure 3. All other clearances MUST be observed as

shown in Figure 1.

i:i iii

_iii_ i_i Typical Horizontal Installation

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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 attach the furnace. These straps

should be attached to the furnace bottom side 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. If the furnace is to be installed ground level in a crawl space, con-

sult local codes. A concrete pad 1"to 2" (25.4 to 50.8mm) thick is recommended.

24" (610 mm) is recommended between the front of the furnace and adjacent construction or other appliances. This should be maintained for service clearance. 30" (762mm) is required to re-

move furnace. Keep all insulating materials clear from Iouvered door. Insulating

materials may be combustible.

7 Specifications are subject to change without notice 44101 202301

and/or property damage.

Place furnace on noncombustible subbase on

downflow applications, unless installing on

noncombustible flooring.

The Multi-position furnace (*8MPT or*8MPV) may be installed in a downflow configuration, (see Figure 4). The minimum clear-

ances to combustion MUST be maintained between the furnace and adjacent constructions, as shown in Figure 1.

In addition to clearances in Figure 1, clearance for the vent pipe

must be considered.

A subbase for combustible floors MUST be used when the furnace

is installed as a downflow on combustible material. See "Duct-

work and Filter" (Downflow Section). The outlet flange must be

bent flat for downflow installation.

When installing a four-position furnace in the downflow position, the logo isto be repositioned so that it is right side-up as follows:

T8MPT and T8MPV Model Numbers

1. Find the door hardware kit that is stored inthe furnace and save it.

2. Carefully remove logo from the outside of burner compart- ment door and save it.

3. Carefully remove two small plug buttons from outside of blower compartment door and save them.

4. Remove two thumbscrews from blower compartment door. Save the two thumbscrews.

5. Install two thumbscrews in holes at other end of blower compartment door from where thumbscrews were re-

moved.

6. Install new strip of rubber gasket on inside of blower compartment door on edge that does not already have a gasket.

7. Install logo retainer pins into holes in blower compartment door from which plug buttons were removed.

8. Install plug buttons into holes in burner compartment door

from which logo was removed.

9. Install blower compartment door on furnace with bevel edge and logo at top.

10. Install burner compartment door on furnace with bevel edge at bottom.

C8MPT, C8MPV, H8MPT, and H8MPV Model Numbers

1. Carefully remove logo from burner compartment door and

save it.

2. Turn the logo rightside-up, and install the logo retainer pins into holes in burner compartment door

3. New labels for rightside-up application on outside of blower compartment door may be purchased in akit from your dis-

tributor to cover upside-down labels.

T ,ca,oown.ow.nsta.a.,on

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Downflow Venting: The combustion venter MUST be rotated to vent out the side for all downflow installations, (see Figure 4). Bot- tom venting is not permitted. See "Side venting" for instructions

to rotate the vent to the side. In addition to rotating the vent to the side, a Vent Pipe Shield (NAHA002VC) is required to shield the hot vent pipe.

PressureSwitch Relocation

If the furnace is installed in the upflow position, the pressure

switch will remain in the same position as installed by the factory

unless the inducer is rotated. If the furnace is installed in an orien-

tation that places the pressure switch below the pressure tap on the inducer housing, then the switch MUST be relocated. In order

to relocate the switch, locate 2 mounting holes or drill above the

inducer pressure tap. When drilling the 2 holes make sure to keep

the switch and tubing far enough away from the burners or hot sur- faces as to not melt the hose, switch, orwires. To prevent possible

kinking of the pressure switch hose, trim the hose to remove ex-

cess length (see Figure 5). If additional wire length is needed, cut the wire tie.

Pressure Switch Tube Routing

PRESS SW ASSY (DUAL)

SCREW HEX HD (2)

i v

BURN HAZARD

Vent pipe is HOT and could result in personal

injury. Hot vent pipe is in reach of small children when

installed in downflow position. Install vent pipe shield NAHAOO2VC.

3. Side Venting

This furnace isshipped from the factory with the venter assembly in an upflow configuration (top vent). The venter assembly can easily be rotated to a side vent configuration for use in upflow, hori-

zontal-flow, or downflow application.

When using a side vent configuration (side outlet instead of top outlet), it may be necessary to relocate the pressure switch to the

alternate position onthe opposite side ofthe top panel. Two screw holes are provided at the alternate position. Route the pressure

switch tubing so the tubing is not kinked and not touching the hot collector box, venter housing, or motor. It may be necessary to shorten the length of the tubing to properly route the tubing and

eliminate kinks.

TUBTNG

2 STAGE/VARIABLESPEED

Note: When drilling new holes make sure metal shavings do not

fall on or in components, asthis can shorten the life of the furnace.

RotatingtheVenterAssembly

1. If gas and electrical power has already been connected to unit, shut off gas and remove power from unit. Unscrew

screws on burner compartment door and remove burner compartment door. (See Figure 6.)

2. Disconnect power leads to the venter motor and hose to pres- sure switch. Remove four(4) screws which secure the venter

to the collector box. (See Figure 7.)

3. Cut webbing with a pair of snips holding the vent plate to the cabinet on either the left or right side of unit depending on

right or left venting as desired. Discard vent plate, (see

Figure 6).

44101 202301 Specifications are subject to change without notice 8

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l li/ l urnacew,t Screws

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Vent Plate

Venter as et

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4. Replace venter gasket (part # 1013540, if needed) to venter assembly with adhesive in the same location as the old one.

5. Rotate venter assembly 90° right or left from original location depending on venting configurations.

6. Tighten the four(4) screws that secure the venter assembly to the collector box. Do not overtighten. Do tighten screws

enough to compress venter gasket.

7. Replace power leads to venter motor and reconnect hose to

pressure switch.

NOTE: Unused open vent hole must be covered. A Vent Cover is

supplied with Vent Pipe Shield Kit NAHA002VC. A 55/16"

(135mm) diameter Vent Cover can be fabricated with sheet metal

for all side vent installations.

4. Combustion & Ventilation Air

gens that will result in safety and performance related problems and may harm the furnace. These instances must use only out-

CARBON MONOXIDE POISONING HAZARD Failure to provide adequate combustion and

ventilation air could result in personal injury or death.

Use methods described here to provide combustion and ventilation air.

Furnaces require ventilation openings to provide sufficient air for proper combustion and ventilation of flue gases. All duct or open- ings for supplying combustion and ventilation air must comply with

the gas codes, or in the absence of local codes, the applicable na- tional codes.

Combustion and ventilation air must be supplied in accordance with one of the following:

1. Section 9.3, Air for Combustion and Ventilation, of the Nation- al Fuel Gas Code, National Fuel Gas Code (NFGC), NFPA

54/ANSI Z223.1-2006 in the U.S.,

Sections 8.2, 8.3, 8.5, 8.6, 8.7, and 8.8 of National Standard of Canada, Natural Gas and Propane Installation Code (NSCNGPIC), CSA B149.1-05 in Canada,

3. Applicable provisions of the local building code. When the installation is complete, check that all appliances have

adequate combustion air and are venting properly. See Venting

And Combustion Air Check in "Gas Vent Installation" Section in

this manual.

ContaminatedCombustionAir

Installations in certain areas or types of structures could cause ex- cessive exposure to contaminated air having chemicals or halo-

9 Specifications are subject to change without notice 44101 202301

door air for combustion.

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 outdoor 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.

• 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.

OutdoorCombustionAirMethod

A space having less than 50 cubic feet per 1,000 BTUH (4.8cubic

meters per kW) input rating for all gas appliances installed in the

space requires outdoor air for combustion and ventilation.

Air Openings and Connecting Ducts

Requirements

1. Total maximum input ratings for all gas appliances in the space MUST be considered when determining free area of openings.

2. Connect ducts or openings directly to the outdoors.

3. When screens are used to cover openings, the openings MUST be no smaller than 1/4" (6.4 mm) mesh.

4. The minimum dimension of air ducts MUST NOT be less

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 8 illustrates how to provide combustion and ventila- tion air when two permanent openings, one inlet and one

outlet, are used.

than 3" (76 mm).

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

louver, assume a 20% free area for wood and 60% for met-

One opening MUST commence within 12" (305 mm) of the floor and the second opening MUST commence

within 12" (305 mm) of the ceiling.

al. Screens shall have a mesh size not smaller than 1/4"

(76mm). b. Size openings and ducts perTable 1.

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

ThisinstallationNOTapprovedinCanada

Gas Vent _,.Gable

/Ventilated AtticS.

T9pAbove Insulation_

I I] I sOffitVent

I I _ ITM

OutletAir (1)

JL I Io sl II I Air(l)

_u ,cI LI _t"_" ,._et

3"I I I'_-°'1 _ _ Air (2)

Minimum One Inletand One Outlet Air Supply is Required

Inlet Air Opening Must be Within12"(300mm} of floor Outlet Air Opening Must be Within12"(300mm} of ceiling

(1} 1 Square Inch per4000 BTUH (2} 1 Square Inch per2000 BTUH

c. Horizontal duct openings reguire 1 square inch of free

d. Vertical duct openings or openings directly communicat-

When one permanent outdoor opening is used, the opening

requires:

The opening shall commence within 12" (305 mm) of the top ofthe enclosure. Appliances shall have clearances of at least 1" (25 mm) from the sides and back and 6" (152.4mm) from the front.

May be in and Combination Shown

area per 2,000 BTUH (11 cmZ/kW) of combined input for all gas appliances in the space (see Table 1).

ing with the outdoors require 1 square inch of free area per 4,000 BTUH (5.5 cm2/kW) for combined input of all

gas appliances in the space (see Table 1).

1sq. inof free area per 3,000 BTUH (7 cm2/kW) for com- bined input of all gas appliances in the space (see Table 1) and

not tess than the sum of the areas of all vent connectors in the space.

Vent

o°s

Outlet

Inlet Air (1)

The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to the outdoors or spaces (crawl or attic) that freely communicate with the out-

doors.

4, Combination of Indoor and Outdoor Air shall have:

a. Indoor openings that comply with the Indoor Combus-

tion Air Method below and

b. Outdoor openings located as required in the Outdoor

Combustion Air Method above and

c. Outdoor openings sized as follows.

1) Calculate the Ratio of all Indoor Space volume divided by required volume for Indoor Combustion

Air Method.

2) Outdoor opening size reduction Factor is 1 minus the Ratio in 1) above.

3) Minimum size of Outdoor openings shall be the size required in Outdoor Combustion Air Method

above multiplied by reduction Factor.

Outlet

_ Air (2)

Air (2)

44101 202301 Specifications are subject to change without notice 10

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

BTUH(kW) TwoVerticalDuctsor RoundDuct

Input TwoHorizontalDucts SingleOpening Openings BTUH(kW)

Rating BTUH(kW) BTUH(kW) BTUH(kW) sq.

50,000 (14.65) 25sq.in.(161 cm2) 16.7sq.in.(108 cm2) 12.5sq.in.(81 cm 2) 4" (101.6mm) 75,000 (21.98) 37.5sq.in.(242 cm2) 25sq.in.(161 cm2) 18.75sq.in.(121 cm2) 5" (127mm)

100,000 (29.31) 50sq.in.(322 cm2) 33.3sq.in.(215 cm2) 25sq.in.(161 cm2) 6" (152.4mm) 125,000 (36.63) 62.50sq.in.(403 cm2) 41.7sq.in.(269 cm2) 31.25sq.in.(202 cm2) 7" (177.8mm)

150,000 75sq.in. 50sq.in. 37.5sq.in. 7" (177.8mm)

EXAMPLE: Determining Free Area

Furnace Water Heater Total Input 100,000 + 30,000 = (130,000 +4,000) = 32.5 Scj. In. Vertical

29.31 8.8 (38.11 + .18) = 210 cmLVertical

Furnace Water Heater Total Input 100,000 + 30,000 = (130,000 +2,000) = 65 Sq. In. Horizontal

29.31 8.8 (38.11 + .09) = 423 cm2 Horizontal

IndoorCombustionAir

Standardand Known-Air-Infiltration Rate Methods

dard or Known-Air-Infiltration Rate Method is used.

CARBON MONOXIDE POISONING HAZARD Failure to supply adequate combustion air could

result in personal injury or death. Most homes will require additional air from

outdoors for combustion and ventilation. A space

Free Area

MinimumFreeAreaRequiredfor EachOpeningorDucttoOutdoors

sq.in./2,000(1 cm2/.09) sq. in./3,000 (1 cm2/.135) sq. in./4,000(1 cm2/.18) in./4,000(6.5cm2/.18)

The Standard Method may be used, if the space has no tess vol-

ume than 50 cubic feet per 1,000 BTUH (4.8 cubic meters per kW)

of the maximum input ratings for all gas appliances installed in the space. The standard method permits indoor air to be used for

combustion and ventilation air. The Known Air Infiltration Rate Method shall be used if the in-

filtration rate is known to be less than 0.40 air changes per hour

(ACH) and equal to or greater than 0.10 ACH. Infiltration rates

greater than 0.60 ACH shall not be used. The minimum required volume of the space varies with the number of ACH and shall be

determined per Table 2 or Equations 1 and 2. Determine the

minimum required volume for each appliance in the space, and

add the volumes together to get the total minimum required vol-

ume for the space.

with at least 50 cubic feet per 1,ODDBTUH (4.8 cubic meters per kW) input rating or homes with tight

construction may need outdoor air, supplied

through ducts, to supplement air infiltration for

proper combustion and ventilation of flue gases.

,::' MINIMUM SPACE VOLUME FOR 100% COMBUSTION AND VENTILATION AIR FROM INDOORS

OtherThanFan-AssistedTotal Fan-assistedTotal

30,000BTU 40,000BTU 50,000BTU 50,000BTU 75,000 100,000BTU 125,000BTU 150,000BTU

ACH (8,790kW) (11,720kW) (14,650kW) (14,650kW) (21,975kW) (29,300kW) (36,625kW) (43,950kW)

ft3(m3)

0.60 1,050 (29.7) 1,400 (39.2) 1,750 (49) 1,250 (35) 1,875 (52.5) 2,500 (70) 3,125 (87.5) 3,750 (105)

0.50 1,260 (35.3) 1,680 (47.04) 2,100 (58.8) 1,500 (42) 2,250 (63) 3,000 (84) 3,750 (105) 4,500 (126)

0.40 1,575 (44.1) 2,100 (58.8) 2,625 (73.5) 1,875 (52.5) 2,813 (78.8) 3,750 (105) 4,688 (131.3) 5,625 (158)

0.30 2,100 (58.8) 2,800 (78.4) 3,500 (98) 2,500 (70) 3,750 (105) 5,000 (140) 6,250 (175) 7,500 (210.6)

0.20 3,150 (88.2) 4,200 (117.6) 5,250 (147) 3,750 (105) 5,625 (157.5) 7,500 (210) 9,375 (262.5) 11,250 (316)

0.10 6,300 (176.4) 8,400 (235.2) 10,500 (294) 7,500 (210) 11,250 (315) 15,000 (420) 18,750 (525) 22,500 (632)

0.00 NP NP NP NP NP NP NP NP

NP = Not Permitted Table 2 Minimum Space Volumes were determined by using the

following equations from the National Fuel Gas Code NFPA 54/ANSI Z223.1-2006, 9.3.2.2:

1. For other than fan-assisted appliances such as a draft

hood-equipped water heater,

-- ACH 1000 BTUH

°soueOVoumOo,.e>'0''( '°t"er)

-- ACH .293 kW

2. For fan-assisted appliances (such as this furnace), calcu- late using the following equation:

11 Specifications are subject to change without notice 441 01202301

Required Volume fan_ 15ft3 ( If an )

ACH 1000 BTUH

RequiredV°lume fan_ "42m3 ( If an /

ACH .293 kW

For fan-assisted appliances such as this furnace,

If:

] other = combined inputof all other than fan-assisted

appliances in BTUH

I fan = combined input of all fan-assisted appliances in

BTUH

ACH = air changes per hour (ACH shall not exceed 0.60)

The following requirements apply to the Standard Method and to the Known Air Infiltration Rate Method.

• Adjoining rooms can be considered part of a space, if there are no closable doors between rooms.

An attic or crawl space may be considered aspace that freely

communicates with the outdoors provided there are ade- quate ventilation openings directly to outdoors. Openings

MUST remain open and NOT have any means of being closed off. Ventilation openings to outdoors MUST be at least

5. Gas Vent Installation

CARBON MONOXIDE POISONING HAZARD Failure to properly vent this furnace could result

in personal injury or death. Use methods described here to provide combus-

tion and ventilation air.

Install the vent in compliance with codes of the country having ju- risdiction, local codes or ordinances and these instructions.

This Category ! furnace is fan-assisted. Category ! furnace definition: A central furnace which operates

with a non-positive vent static pressure and with a flue loss not less than 17 percent. These furnaces are approved for common-

venting and multi-story venting with other fan-assisted or draft hood-equipped appliances in accordance with the NFGC or

NSCNGPIC.

CategoryI SafeVentingRequirements

Category [ furnace vent installations shall be in accordance with Parts 10 and 13 of the National Fuel Gas Code (NFGC), NFPA 54/ANSI Z223.1-2006; and/or Section 8 and Appendix C of the

CSA B149.1-05, National Standard of Canada, Natural Gas and Propane Installation Code; the local building codes; furnace and

vent manufacturer's instructions. NOTE: The following instructions comply with the NFPA 54/ANSI

Z223.1-2006 National Fuel Gas Code and CSA B149.1 Natural Gas and Propane Installation code, based on the High-Heat

input rate on the furnace rating plate.

1. If a Category ! vent passes through an attic, any concealed space or floor, use ONLY Type B or Type L double wall vent pipe. If vent pipe passes through interior wall, use type B vent

pipe with ventilated thimble ONLY.

2. Do NOT vent furnace into any chimney serving an open fire- place or solid fuel burning appliance.

1square inch of free area per 4,000 BTUH of total input rating

for all gas appliances in the space.

• In spaces that use the Indoor Combustion Air Method, in- filtration should be adequate to provide air for combustion,

ventilation and dilution of flue gases. However, in buildings with unusually tight construction, additional air MUST

be provided using the methods described in section

titled Outdoor Combustion Air Method:

• Unusually tight construction is defined as Construction with

1. Wails and ceilings exposed to the outdoors have a con- tinuous, sealed vapor barrier. Openings are gasketed or

sealed and

2. Doors and openabte 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 walt-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 intothe conditioned space as replace-

ment air. Whichever method is used, the mixed return air tempera- ture across the heat exchanger MUST not fall below 60° continuously, or 55° on an intermittent basis so that flue gases will

not condense excessively inthe heat exchanger. Excessive con- densation will shorten the life of the heat exchanger and possibly void your warranty.

3. Use the same diameter Category ! connector or pipe as per-

mitted by:

• by the National Fuel Gas Code Code (NFGC) NFPA 54/ANSI Z223.1-2006 Sections 12 and 13 venting re- quirements in the United States

• the National Standard of Canada Natural Gas and Pro-

pane Installation Code (NSCNGPIC) CSA B149.1-05 Section 8 and appendix C venting requirements in Cana- da.

4. Push the vent connector onto the furnace flue collar of the venter assembly until it touches the bead (at least 5/8" over-

lap) and fasten with at least two field-supplied, corrosion-re-

sistant, sheet metal screws located at least 140° apart.

5. Keep vertical Category ! vent pipe or vent connector runs as short and direct as possible.

6. Vertical outdoor runs of Type-B or ANY single walt vent pipe

below the roof line are NOT permitted.

7. Slope all horizontal runs upwards from furnace to the vent ter-

minal a minimum of 1/4" per foot (21 mm/m).

8. Rigidly support all horizontal portions of the venting system every 6' (1.8m)or less using proper clamps and metal straps to prevent sagging and ensure there is no movement after

installation.

9. Check existing gas vent or chimney to ensure they meet clearances and local codes. See Figure 1

10. The furnace MUST be connected to afactory built chimney or vent complying with a recognized standard, or a masonry or concrete chimney lined with a lining material acceptable to the authority having jurisdiction. Venting into an unlined

masonry chimney or concrete chimney is prohibited.

See the Masonry Chimney Venting section in these in- structions.

11. Fan-assisted combustion system Category ! furnaces shall

not be vented into single-wall metal vents.

12. Category ! furnaces must be vented vertically or nearly verti- cally, unless equipped with a listed mechanical venter.

13. Vent connectors serving Category I furnaces shall not be connected into any portion of mechanical draft systems oper- ating under positive pressure.

44101 202301 Specifications are subject to change without notice 12

VentingandCombustionAir Check

NOTE: When an existing Category ! furnace is removed or re-

placed, the original venting system may no longer be sized to properly vent the attached appliances, and to make sure there is adequate combustion air for all appliances, MAKE THE FOL- LOWING CHECK.

CARBON MONOXIDE POISONING HAZARD Failure to follow the steps outlined below for each

appliance connected to the venting system being placed into operation, could result in carbon monoxide poisoning

or death: The following steps shall be followed for each appliance

connected to the venting system being placed into operation, while all other appliances connected to the

venting system are not in operation:

1. Seal any unused openings in the venting system.

2. Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, NFPA

54/ANSI Z223. 1-2006 or CSA B149. 1,Natural Gas and Pro- pane Installation Code and these instructions. Determine

that there is no blockage or restriction, leakage, corrosion

and other deficiencies which could cause an unsafe condi-

tion.

3. As far as practical, close all building doors and windows and all doors between the space in which the appliance(s) con-

nected to the venting system are located and other spaces of

the building.

4. Close fireplace dampers.

5. 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 are operating at max- imum speed. Do not operate a summer exhaust fan.

6. Follow the lighting instructions. Place the appliance being in- spected into operation. Adjust the thermostat so appliance is operating continuously.

7. Test for spillage from draft hood equipped appliances at the draft hood relief opening after 5 minutes of main burner op- eration. Use the flame of a match or candle. (Figure 9)

8. If improper venting is observed, during any of the above

tests, the venting system must be corrected in accordance

with the National Fuel Gas Code, NFPA 54/ANSI

Z223. 1-2006 and/or CSA B149.1, Natural Gas and Propane

Installation Code.

9. After it has been determined that each appliance connected

to the venting system properly vents when tested as outlined

above, return doors, windows, exhaust fans,

fireplace dampers and any other gas-fired burning

appliance to their previous conditions of use.

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii....

Vent Pipe --_ I A/ Draft Hood

Typical Gas

Water Heate_ I I V_('-" Match

NOTE: If flame pulls towards draft ood, this indicates

sufficient infiltration air.

Ventingto ExistingMasonryChimney

NOTE: The tables and notes referred to below are found in the most recent printing of the NFGC venting tables.

Use the NFGC or NSCNGPIC Tables to size the chimney or vent. Dedicated venting of one fan assisted furnace into any ma-

sonry chimney is restricted. A chimney must first be lined with either Type-B vent sized in accordance with NFPA 54/ANSI Z223.1-2006 tables 13.1 or13.2 or a listed, metal lining system, sized in accordance with the NFPA 54/ANSI Z223.1-2006 section

13.1.7 for a single appliance or 13.2.19 for multiple appliances or

CSA B149.1-05 Annex C; or venting into a masonry chimney is

permitted as outlined with use of an optional listed masonry chim- ney kit. (See Section 7. Masonry Chimney Venting of these in-

structions)

Listed, corrugated metallic chimney liner systems in masonry

chimneys shall be sized by using NFPA 54/ANSI Z223.1-2006 or CSA B149.1-05 tables for dedicated and common venting with

the maximum capacity reduced by 20% (0.80 X maximum capac-

ity) and the minimum capacity as shown in the applicable table. Corrugated metal vent systems installed with bends or offsets re- quire additional reduction of 5% of the vent capacity for each bend

up to 45° and 10% of the vent capacity for each bend from 45 ° up to 90°.

NOTE: Two(2) 45 ° elbows are equivalent to one (1) 90° elbow.

CombinedVentinginto a MasonryChimney

Venting into a masonry or concrete chimney is only per-

mitted as outlined in the NFGC or NSCNGPIC venting tables.

Follow all safe venting requirements.

NOTE: See Masonry Chimney Venting section.

VentCheck

i !

6. Horizontal Venting

CategoryI FurnacesWith ExternalPower Venters

In order to maintain a Category ! classification of fan-assisted fur- naces when vented horizontally with sidewall termination, a power

venter is REQUIRED to maintain a negative pressure in the vent- ing system.

In the U.S.: Per the NFPA 54/ANSI Z223.1-2006, a listed power venter may be used, when approved by the authority having juris-

diction. In Canada: Only power venters approved by the power ventor

manufacturer and where allowed by the authority having jurisdic- tion may be used

Please consult the Fields Controls Co. or Tjernlund Products, Inc. for power venters certified for use with this furnace.

13 Specifications are subject to change without notice 44101 202301

VentTermination

VentingThrough a Non-Combustible and Combustible Wall

Consult External Power Venter manufacturer instructions.

Select the power venter to match the Btuh input of the furnace be-

ing vented. Follow all of the manufacturer's installation require-

ments included with the power venter for:

• venting installation,

• vent terminal location,

• preventing blockage by snow,

• protecting building materials from degradation by flue gases,

• see Figure 10 for required vent termination.

NOTE: It is the responsibility of the installer to properly terminate the vent and provide adequate shielding. This is essential in order to avoid water/ice damage to building, shrubs and walkways.

Other than Direct Vent Termination Clearance

.......-r...............

.............. /

............. / i

25-24-65-2

D VENTTERMINAL \ /_

Item Clearance Descriptions

A Clearance above grade, veranda, porch, deck, balcony, or

anticipated snow level

B Clearance to a window or door that may be opened

%X/' A R SUPPLY NLET

Canadian Installation (1)

12 inches (30cm) #

6 inches (15 cm) for appliances -< 10,000 Btuh (3 kW)

12 inches ( 30 cm) for appliances > 10,ooo Btuh (3 kWO) and -< 100,go0 Btuh (30 kW), 36 inches (91 cm) for appliances > t00,000 Btuh (30 kW)

AREA WHERE TERMINAL IS NOT PERMITED

U.S. Installation (2)

12 inches (30 cm)

4 feet(1.2 m) below or to the side of the opening. 1 foot (30 cm above the opening.

C Clearance to a permanently closed window

D Vortical clearance to aventilated soffit located above the

terminal within a horizontal distance of 2"(61cm) tram the centerline of the terminal

E Clearance to an unventilated soffit

F Clearance to an outside corner

G Clearance to an inside corner

H Clearance to each side of the centerline extended above

electrical meter or gas service regulator assembly

I Clearance to service regulator vent outlet

J Clearance to non-mechanical air supply inlet to building or

the combustion air inlet to any other appliance

Clearance to a mechanical air supply inlet

Clearance under a veranda, porch, deck, or balcony

Clearance to each side of the centerline extended above or below vent terminal of the furnace to a dryer or water heater vent, or other appliance's direct vent intake or exhaust.

N Clearance to the vent terminal of a dryer vent, water heater

vent, or other appliances direct vent intake or exhaust.

O Clearance from a plumbing vent stack

p Clearance above paved sidewalk or paved 7 feet (2.13m)**

driveway located on public property

(1.) In accordance with the current CSA B149.1, Natural Gas and Predane Installation Code

(2.) In accordanoe with the current NFPA 54/ANSI Z223.1 ,National Fuel Gas Code

# 18" (46 am) above roof surface

3 feet (91 cm) within 15 feet(4.5 m) above the meter/regulator assembly

3 feet (91 ore)

6 inches (15 cm) for appliances -< 10,000 Btuh (3 kW) 12 inches ( 30 cm) for appliances > 10,000 Btuh (3 kW0)

and -< 10Or000 Btuh (30 kW) 36 inches (91 cm) for appliances > 100,000 Btuh (30 kW)

5 feet(1.83 m)

12 inches(30 cm) +

3 feet (91 cm) w_thin 15 feet (4.5 m) above the meter/regulator assembly

4 feet (t .2 m) below or to the side of opening: 1 foot (30 sin) above opening.

3 feet (91 cm) above if wi_in 10 feet (3 m horizontally)

7 feet (2.13m)

+ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum oftwo sides beneath the floor.

For clearances not specified in NFPA 54/ANSI Z22S.1 or CSA B149. t, clearances shall be inaccordance with local installation codes and the requiremenls of the gas supplier and the

Manufacturer's installation instructions.

** A vent shall not terminate above 8. sidewalk or paved driveway that is located between two single family dwellings and serves beth dwellings. Notes:

t. The vent for this appliance shall not terminate

a. Over publicwalkways; or b. Near soffit vents or crawl space vents or other areas where condensate er vapor could create a nusiance or hazard or property damage: or

c. Where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief valves, or other equipment.

2. When locating vent terminations, consideration must be given to prevailing winds, location, and other conditions which may cause recirculation of the combustiob products of adjacent vents. Recirculation can cause poor combustion, inlet condensate problems, and accelerated corrosion of the heat exchangers.

3 Avoid venting under a deck or large overhang. Recirculatien could occur and cause performance or system problems. A05013

44101 202301 Specifications are subject to change without notice 14

7. Masonry Chimney Venting

ChimneyInspection

All masonry chimney construction must conform to Standard NFPA 211-2006 and to any state or local codes applicable. The chimney must be in good condition and a complete chimney in-

spection must be conducted prior to furnace installation. If the in- spection reveals damage or abnormal conditions, make necessary repairs or seek expert help. See "The Chimney Inspec- tion Chart" Figure 11. Measure inside area of tile-liner and exact

height of chimney from the top of the chimney to the highest ap- pliance flue collar or drafthood outlet.

Connector Type

To reduce flue gas heat loss and the chance of condensate prob- lems, the vent connector must be double-wall Type Bvent except as specified in the listed kit.

Venting Restrictionsfor ChimneyTypes

Interior Chimney - has no sides exposed to the outdoors below

the roofiine. All installations can be single furnace or common vented with another draft hood equipped Category [ appliance.

Exterior Chimney - has one or more sides exposed to the out- doors below the roof line. All installations with a 99% Winter De-

sign Temperature* below 17°F (-8°C) must be common vented only with a draft hood equipped Category ! appliance.

* The 99% Winter Design Dry-Bulb (db) temperatures are

found in the 2005 ASHRAE Fundamentals Handbook CD and Chapter 28.

CARBON MONOXIDE POISONING, FIRE AND

EXPLOSION HAZARD Failure to properly vent this furnace could result in

personal injury, death and/or property damage. These furnaces are CSA (formerly AGA and CGA)

design-certified for venting into exterior clay

tile-lined masonry chimneys with a factory

accessory Chimney Adapter Kit. Refer to the furnace rating plate for correct kit usage. The Chimney Adapter Kits are for use with ONLY

furnaces having a Chimney Adapter Kit number marked on the furnace rating plate.

If a clay tile-lined masonry chimney is being used and it is ex- posed to the outdoors below the roof line, relining might be re-

quired. Chimneys shall conform to the Standard for Chimneys,

Fireplaces, Vents, and Solid Fuel Burning Appliances NFPA

211-2006 in the United States and to a Provincial or Territorial

Building Code in Canada (in its absence, the National Building

Code of Canada) and must be in good condition.

U.S.A.-Refer to Sections 13.1.8 and 13.2.20 of the NFPA

54/ANSI Z223.1-2006 orthe authority having jurisdiction to deter-

mine whether relining is required. If relining is required, use a properly sized listed metal liner, Type-B vent, or a listed alterna-

tive venting design.

NOTE: See the NFPA 54/AN SI Z223.1-2006, 13.1.8 and 13.2.20 regarding alternative venting design and the exception, which

cover installations such as the Chimney Adapter Kits

NAHA001DH and NAHA002DH, which are listed for use with

these furnaces.

The Chimney Adapter Kit are listed alternative venting design for these furnaces. See the kit instructions for complete details.

Canada (and U.S.A.)-This furnace is permitted to be vented into a clay tile-lined masonry chimney that is exposed to the outdoors

below the roof line, provided:

1. Vent connector is Type-B double-wall, and

2. This furnace is common vented with at least 1 draft hood- equipped appliance, and

The combined appliance input rating is less than the maxi-

mum capacity given in Table A, and

The input rating of each space-heating appliance is greater than the minimum input rating given in Table B for Masonry

Chimneys for the local 99% Winter Design Temperature. Chimneys having internal areas greater than 38 square

inches require furnace input ratings greater than the input ratings of these furnaces. See footnote at bottom of Table B, and

5. The authority having jurisdiction approves.

If all of these conditions cannot be met, an alternative venting de- sign shall be used, such as the listed chimney adapter kit with a furnace listed for use with the kit, a listed chimney-lining system,

or a Type-B vent.

15 Specifications are subject to change without notice 44101 202301

Exterior Masonry Chimney,

FAN+NAT Installations with

Type-B Double-Wall Vent Connectors

TableA-

CombinedAppliance

MaximumInput Rating in Thousandsof Btu per Hr

VENT

HEIGHT

FT(m)

6(1.8) 8(2.4)

10(3)

15(4.6) 20(6.1)

30(9.1)

12(77.4) 19(122.6) 28(180.6) 38(245.2)

MinimumAllowable Input Ratingof

Space- HeatingAppliance in

VENT INTERNAL AREA OF CHIMNEY

HEIGHT sq. in(cm)

FT(m) 12(77.4) 19(122.6) 28(180.6) 38(245.2)

6(1.8) 0

8(2.4) 52

10(3) NR

14.

15(4.6) NR

20(6.11) NR

30(9.1) NR

6(1.8)

8(2.4)

10(3)

15(4.6)

20(6.11)

30(9.1)

6(1.8) NR

8(2.4) NR

10(3) NR

15(4.6) NR

20(6.11) NR

30(9.1) NR

- 11°F Local 99% Winter Design Temperature:

(-24°C) -11°F (-24°C) or lower*

or lower Not recommended for any vent configuration

* The 99% Winter Design Dry-Bulb (db) temperatures are

found in the 2005 ASHRAE Fundamentals Handbook CD and Chapter 28.

Inspections before the sale and at the time ofinstallation wilt deter- mine the acceptability of the chimney or the need for repair and/or

(re)lining. Refer to "The Chimney Inspection Chart" to perform a

chimney inspection.

INTERNALAREA OF CHIMNEY

SQ IN.(cm)

74 119 178 257

80 130 193 279 84 138 207 299

NR 152 233 334 NR NR 250 368 NR NR NR 404

Table B-

Thousandsof Btu per Hr

Local 99% Winter Design Temperature:

17 to 26°F (-8 to -3°C) *

55 99 141 74 111 154

90 125 169

NR 167 212 NR 212 258

NR NR 362

Local 99% Winter Design Temperature:

5to 16°F (-15 to -9°C) *

NR 78 121 166 NR 94 135 182

NR 111 149 198 NR NR 193 247

NR NR NR 293 NR NR NR 377

Local 99% Winter Design Temperature:

-10 to 4°F (-23 to -16°C) * NR 145 196

NR 159 213 NR 175 231

NR NR 283 NR NR 333 NR NR NR

If the inspection of a previously used tile-lined chimney:

a. Shows signs of vent gas condensation, the chimney should

be relined in accordance with local codes and the authority having jurisdiction. The chimney should be relined with a listed metal liner, Type-B vent, or a listed chimney adapter

kit to reduce condensation. If a condensate drain is re- quired by local code, refer to the NFPA 54/ANSI

Z223.1-2006 Section 12.10 for additional information on

condensate drains.

b. Indicates the chimney exceeds the maximum permissible

size in the tables, the chimney should be rebuilt or relined to

conform to the requirements of the equipment being installed and the authority having jurisdiction.

A chimney without a clay tile liner, which is otherwise in good con- dition, shall be rebuilt to conform to NFPA 211 or be lined with a UL

listed (ULC listed in Canada) metal liner or UL listed Type-B vent. Relining with a listed metal liner or Type-B vent is considered to

be a vent-in-a-chase. If a metal liner or Type-B vent is used to line a chimney, no other

appliance shall be vented into the annular space between the chimney and the metal liner.

Appliance Application Requirements

Appliance operation has a significant impact on the performance of the venting system. If the appliances are sized, installed, ad- justed, and operated properly, the venting system and/or the ap-

pliances should not suffer from condensation and corrosion. The venting system and all appliances shall be installed in accordance with applicable listings, standards, and codes.

The furnace should be sized to provide 100% of the design heat-

ing load requirement plus any margin that occurs because of fur-

nace model size capacity increments. Heating load estimates can

be made using approved methods available from Air Conditioning Contractors of America (Manual J); American Society of Heating,

Refrigerating, and Air-Conditioning Engineers; or other approved engineering methods. Excessive oversizing of the furnace could cause the furnace and/or vent to fail prematurely.

When a metal vent or metal liner is used, the vent or liner must be

in good condition and be installed in accordance with the vent or

liner manufacturer's instructions. To prevent condensation in the furnace and vent system, the fol-

lowing precautions must be observed:

1. The return-air temperature must be at least 60°F db except for brief periods oftime during warm-up from setback at no

lower than 55°F db or during initial start-up from a standby condition.

2. Adjust the gas input rate per the installation instructions. Low gas input rate causes low vent gas temperatures,

causing condensation and corrosion in the furnace and/or

venting system. Derating is permitted only for altitudes

above 2000' (609.6m).

3. Adjust the air temperature rise to the midpoint of the rise range or slightly above. Low air temperature rise can cause low vent gas temperature and potential for condensation problems.

4. Set the thermostat heat anticipator or cycle rate to reduce

short cycling.

Air for combustion must not be contaminated by halogen com-

pounds which include chlorides, fluorides, bromides, and iodides. These compounds are found in many common home products such as detergent, paint, glue, aerosol spray, bleach, cleaning solvent, salt, and air freshener, and can cause corrosion of furnaces and

vents. Avoid using such products in the combustion-air supply. Fur-

nace use during construction of the building could cause the furnace to be exposed to halogen compounds, causing premature failure of

the furnace or venting system due to corrosion. Vent dampers on any appliance connected to the common vent can

cause condensation and corrosion inthe venting system. Do not use vent dampers on appliances common vented with this furnace.

44101 202301 Specifications are subject to change without notice 16

CHIMNEYINSPECTION CHART

For additiona(requirements refer to theNationa(Fue(Gas Code NFPA 54/ANSIZ223.1 2006andNFPA211 2006 Chimneys,Firep)aces,Vents,andSo))dFue)BurningApp(iancesin theU.S.A. or tothe CanadianInstallationCode CSA-B149.1 inCanada.

Missingmortar Rebuild

or brick? crown

condition: I

with day tile No

liner?

sea()ngood or relinechimneyas

condition necessary.

Yes :_epair

Debrisin

c)eanout?Mortar,tile, Mortaror Removemortar

metalvent, fuel oil t)]edebris? andt)ie debris?

residue?

Removemetal vent or liner._oNo

(inerortop sea(

Reline

17 Specifications are subject to change without notice 44101 202301

8. Gas Supply and Piping

FIRE AND EXPLOSION HAZARD Failure to follow this warning could result in

personal injury, death and/or property damage. Models designated for Natural Gas are to be used

with Natural Gas ONLY, unless properly converted to use with Propane gas.

GasSupply Requirements

Gas supply 3ressure should be within minimum and maximum values listed on rating plate. Pressures are usually set by gas sup-

pliers.

(See Propane Gas Conversion Kit instruction manual for furnaces

converted to Propane gas)

• Use only the Type of gas approved for this furnace. See rat- ing plate for approved gas type.

• A 1/8" NPT plugged tapping, accessible for a test gauge

connection,must be installed immediately upstream of the gas supply connection to furnace.

• Gas supply pressure should be within minimum and maxi- mum values listed on rating plate. Pressures are usually set

by gas suppliers.

• Gas input must not exceed the rated input shown on the rat- 3. ing plate. Overfiring wilt result in failure of heat exchanger

and cause dangerous operation. 4.

• Do not allow minimum supply pressure to vary downward. Doing so will decrease input to furnace. Refer to Table 3 for 5.

Gas supply. Refer to Table 5 or Table 4 for manifold pres- sures.

Gas Pressures

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Gas Type

Recommended Min.

Natural 7 in wc 4.5 in wc

(1744 Pa) 1121 Pa)

Propane 11 in wc 11 in wc

(2740 Pa) (2740 Pa)

Supply Pressure

Max.

14 in wc

(3487 Pa)

14 in wc

(3487 Pa)

Gas PipingRequirements

NOTE: The gas supply line must be installed by a qualified service

technician in accordance with all building codes.

NOTE: In the state of Massachusetts.

a. Gas supply connections MUST be performed by a li-

censed plumber or gas fitter).

b. When flexible connectors are used, the maximum length

shall not exceed 36" (915 mm).

c. When lever handle type manual equipment shutoff

valves are used, they shall be T-handle valves.

d. The use of copper tubing for gas piping is NOT approved

by the state of Massachusetts.

Install gas piping in accordance with local codes, or in the ab-

sence of local codes, the applicable national codes.

Itis recommended that a manual equipment shutoff valve be

installed in the gas supply line outside the furnace. Locate valve as close to the furnace as possible where it is readily accessible. Refer to Figure 12.

Use black iron or steel pipe and fittings or other pipe approved

by local code.

Use pipe thread compound which is resistant to natural and

Propane gases.

Use ground joint unions and install a drip teg no less than 3"

long to trap dirt and moisture before it can enter gas control valve inside furnace.

Typical Gas Piping and Adding Propane Low Pressure Switch

DripLegandUnion,Unionshouldbeoutsidethe Manualshut-off /_'_ -_-_- '

cabinet.Manualshut-offvalveMUSTbeupstreamof valve_. _ _L_. _./

dripleg,union,andfurnace• "................ _ _ __ _

Osee,owsan° ",,°,.r.,,.n,,e,ocon---

nectvalvetopipingwhenusingnghtsidegas-"_. _-_? "_ ...... _ _\_-_ -'\b

pipeentry. _ _ _-_--. _ _I_ J ",_-_ _

PropaneLowpressure _'__\'/ _"'_ - i

switchREQUIRED ............ --- / \ / _ _\_ j; _ '

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

, _ installation

........... GJ __ __ ;_% .._. i

. . • .... ......... _. _ _"._ .... _ "_--_ _"}Jl/ !

/ _i _" 25-24-86

_'_.. Alternative

44101 202301 Specifications are subject to change without notice 18

FIRE HAZARD Failure to follow this warning could result in

personal injury, death and/or property damage. Use wrench to hold furnace gas control valve

when turning elbows and gas line to prevent damage to the gas control valve and furnace.

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

NOTE: If local codes allow the use of aflexible gas appliance con- nector, always use a new listed connector. Do not use aconnector

which has previously served another gas appliance.

7. Flexible corrugated metal gas connector may NOT be used

inside the furnace or be secured or supported by the fur- nace or ductwork.

Properly size gas pipe to handle combined appliance toad

or run gas pipe directly from gas meter or Propane gas reg-

ulator.

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

10. Measure pipe length from gas meter or Propane second stage regulator to determine gas pipe size.

; 1i; ] J)i ]J ; i

Gas Valve with Elbows (*8MPT/*SMPV)

25 25 03a

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l Gas a,vewit.E,bows

(*8MPT/*8MPV)

Left Side Gas Supply Piping

Gas line can be installed directly to the gas valve through the hole provided in the left side of the cabinet. See Figure 12

Right SideGas Supply Piping

Two(2) 90 ° street elbows or two(2) 90° standard elbows and two(2) close nipples are required for right side gas supply. See

Figure 12.

4. Gas supply line then can be run directly into opening of elbow.

Pipingwith Close Nipples and Standard Elbows

1. Assemble elbows and nipples similar to street elbows shown in Figure 13.

2. Follow steps 2 through 4 Piping with Street Elbows.

Piping withStreet Elbows

1. Assemble the elbows so that the outlet of one(l) elbow is 90° from the inlet of the other. The elbows should be tight enough to be leak proof. An additional 1/4turn will be required at the

end of step 2, see Figure 13.

2. Screw elbow assembly into gas valve far enough to be leak proof. Position elbow assembly so that the inlet of the elbow is

at the bottom of the gas valve. An additional 1/2 turn will be required in step 3. Turn open end of inlet elbow to face the

right side of the furnace (1/4 turn), see Figure 14.

3. Turn assembly an additional 1/2 turn to position inlet near the

top of the gas valve. In line with gas opening on right side of furnace, see Figure 12 and Figure 15.

, ows

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

25 23 23c

19 Specifications are subject to change without notice 44101 202301

FIRE OR EXPLOSION HAZARD Failure to properly install metal gas connector

could result in personal injury, death and/or

property damage.

A flexible corrugated metal gas connector must be

properly installed, shall not extend through the side

of the furnace, and shall not be used inside the

furnace.

Black iron pipe shall be installed at the furnace gas

control valve and extend a minimum of 2" outside

furnace.

Additional Propane PipingRequirements

• Have a licensed Propane gas dealer make all connections at storage tank and check all connections from tank to fur-

nace.

• If copper tubing is used, it MUST comply with limitation set in local codes, or in the absence of local codes, the gas

codes of the country having jurisdiction.

• Two-stage regulation of Propane gas is recommended.

PropaneConversion

An accessory kit shall be used to convert to propane gas use, see the furnace rating plate for the Propane conversion accessory kit

part number.

CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in per-

sonal injury, death and/or property damage. NOx inserts for use with Natural Gas units

ONLY. If Propane Gas is required, NOx inserts must be removed.

FIRE, EXPLOSION HAZARD Failure to follow this warning could result in per-

sonal injury, death and/or property damage. A Propane conversion accessory kit is required

when operating the furnace with Propane gas.

For Propane conversion remove screws that secure the NOx in- sert and discard insert.

Reinstall screws. See Figure 16 NOTE: It is very important to reinstall the NOx insert mounting

screws.

;i;'iii

Removing NOx inserts

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Ensure furnace is equipped with the correct main burner orifices. Refer to Table 5 or Table 4 for correct orifice size and manifold

pressure for a given heating value and specific gravity for natural

and propane gas.

OperationAbove2000ft (609.6m)Altitude

FIRE, EXPLOSION, CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in per- sonal injury, death and/or property damage.

This high-altitude gas-conversion shall be done by a qualified service agency in accordance with the Manufacturer's instructions and all applicable codes and requirements, or in the absence of local

codes Tthe applicable national codes.

These furnaces may be used at full input rating when installed at altitudes up to 2000ft (609.6m). When installed above 2000ft

(609.6m), the High Heat input must be decreased 2% (natural) or

4% (Propane) for each 1000ft (304.8m) above sea level in the

USA. In Canada, the input rating must be derated 10% (natural) or

5% (Propane) for altitudes of 2000 to 4500ft (609.6 to 1371.6m) above sea level. This may be accomplished by a simple adjust-

ment of manifold pressure or an orifice change, or a combination

of a pressure adjustment and an orifice change. The changes re- quired depend on the installation altitude and the heating value of

the fuel. Table 4 and Table 5 show the proper furnace manifold

pressure and gas orifice size to achieve proper performance based on elevation above sea level for both natural gas and pro-

pane gas.

25-24-99a

FIRE OR EXPLOSION HAZARD

An open flame or spark could result in personal

injury, death and/or property damage. Propane gas is heavier than air and will settle and

remain in low areas and open depressions. Thoroughly ventilate area and dissipate gas. Do

NOT use a match or open flame to test for leaks, or attempt to start up furnace before thoroughly

ventilating area.

OrificeSizing

NOTE: Factory sized orifices for natural and Propane gas are

listed in the furnace Technical Support Manual.

To use the natural gas table, first consult your local gas utility for the heating value of the gas supply. Select the heating value in the vertical column and follow across the table until the appropriate

elevation for the installation is reached. The value in the box atthe

intersection of the altitude and heating value provides not only the manifold pressure but also the orifice size. In the natural gas

tables the factory-shipped orifice size is in bold (42). Other sizes

must be obtained from service parts.

High Altitude Input Rate =

Nameplate Sea Level Input Rate x (Multiplier) [USA]

High Altitude MultiplierElevation

ft (m)

2001' - 3000'

(609.9 - 914.4)

3001' - 40OO'

(914.7 - 1219.2)

4001' - 5000'

(1219.5- 1524)

5001' - 6000'

(1524.3- 1828.8)

6001' - 7000'

(1829.1 - 2133.6) 0.87 0.74

7001' - 8000'

(2133.9 - 2438.4) 0.85 0.70

* Based on mid-range of elevation.

Natural Gas Propane Gas

0.95 0.90

0.93 0.86

0.91 0.82

O.89 O.78

44101 202301 Specifications are subject to change without notice 20

MANIFOLDPRESSUREANDORIFICESIZE FORHIGHALTITUDEAPPLICATIONS

NATURAL GAS MANIFOLD PRESSURE (in wc)

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HEATING VALUEat

ALTITUDE

BTU/CU.

FT,

700

725

750

775

0to2000 2001to3000 3001to4000 4001to5000 5001to6000 6001to7000

(0to609.6) (609.9to914.4) (914.7to1219.2) (1219.5to1524) (1524.3to1828.8) (1829.1to2133.6)

Orifice Mnfld Pres- Orifice MnfldPressure Orifice MnfldPressure Orifice Mnfld Pressure Orifice Mnfld Pressure Orifice Mnfld Pres-

No. sure No. No. No. No. No. sure

HI LO HI LO HI LO HI LO HI LO HI LO

_ = _- _ = ,_ := = _ i.:_= . 41 3.7 1.8

:-_ , _: , _ i..- _ _ i,;::4 .. _ 41 3.5 1.7 42 3.6 1.7

800 825 850

875

900 925 950

975

1000

1050 1100

41 3.7 1.8 42 3.5 1.7 42 3.3 1.6 43 3.7 1.8 43 3.4 1.7 43 3.1 1.5 44 3.3 1.6 41 3.5 1.7 42 3.3 1.6 42 3.1 1.5 43 3.5 1.7 43 3.2 1.6 44 3.4 1.7 44 3.1 1.5 42 3.7 1.8 42 3.2 1.6 43 3.6 1.8 43 3.3 1.6 44 3.5 1.7 44 3.2 1.6 45 3.6 1.7

42 3.5 1.7 43 3.7 1.8 43 3.4 1.7 43 3.1 1.5 44 3.3 1.6 45 3.7 1.8 45 3.4 1.7 42 3.2 1.6 43 3.3 1.6 43 3.1 1.5 44 3.3 1.6 45 3.6 1.8

43 3.6 1.7 44 3.5 1.7 44 3.2 1.6 45 3.6 1.8

41 3.6 1.7 42 3.6 1.8 42 3.4 1.6 42 3.1 1.5 43 3.5 1.7 43 3.2 1.6 42 3.7 1.8 42 3.4 1.7 42 3.2 1.6 43 3.6 1.7 43 3.3 1.6 44 3.5 1.7

Conversion:1inwc=249Pa NOTE: Natural gas data is based on 0.60 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI

Z223.1-2006/NFPA 54-2006 or National Standard of Canada, Natural GasAnd Propane Installation Code CSA B149.1-05. * In the USA, derating of these furnaces at 2% (Natural Gas) and 4% (Propane Gas) has been tested and design-certified by CSA.

In Canada, the input rating must be derated 5% (Natural Gas) and 10% (Propane Gas) for altitudes of 2,000 to 4,500 (609.6 to

1371.6m) above sea level. Use the 2001 to 3000 (609.9 to 914.4m) column in Table 4 and Table 5.

The burner orifice part nos. are as follows: HighAltitudeAir PressureSwitch

Orifice #41 1096942 Orifice #42 1011351 Orifice #43 1011377 Orifice #44 1011352 The factory-installed pressure switches need NOT be changed

Orifice #45 1011353 Orifice #54 1011376 for any furnace installations from sea level up to and including Orifice #55 1011354 Orifice #56 1011355 8,000' (24.8.4 m) altitude.

MEAN ELEVATIONFEET ABOVE SEA LEVEL if(m)

7001to 8000

(2133.9to 2438.4)

Orifice MnfldPres-

No. sure

HI LO

_ :=- = 41 3.7 1.8 41 3.4 1.7

41 3.6 1.7 42 3.6 1.8 42 3.3 1.6

41 3.6 1.8 42 3.7 1.8 42 3.4 1.7 42 3.1 1.5 41 3.7 1.8 41 3.4 1.7 42 3.5 1.7 42 3.2 1.6 43 3.6 1.8 41 3.5 1.7 42 3.6 1.7 42 3.3 1.6 43 3.7 1.8 43 3.4 1.7

PROPANE GAS MANIFOLD PRESSURE (in wc)

MEAN ELEVATIONFEET ABOVE SEA LEVEL if(m)

HEATINGVALUE 0to 2000 2001to3000 3001to4000 4001to5000 5001to6000 6001to7000 7001to 8000

at ALTITUDE (0to609.6) (609.9to914.4) (914.7to1219.2) (1219.5to1524) (1524.3to1828.8) (1829.1to2133.6) (2133.9to2438.4)

BTU/CU. FT.

2500 10.0 4.9 10.0 4.9 9.0 4.4 10.0 4.9 9.4 4.6 8.5 4.2 10 4.9

"'1"° "'1.o .,1.o.,1.o.,1.o.,1.o.,1.o

Orifice Size #54 #54 #54 #55 #55 #55 #56

Conversion:1inwc=249Pa NOTE: Propane data is based on 1.53 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI

Z223.1-2006/NFPA 54-2006 or National Standard OfCanada, Natural GasAnd Propane Installation Code CSA B149.1-05. * In the USA, derating of these furnaces at 2% (Natural Gas) and 4% (Propane Gas) has been tested and design-certified by CSA.

In Canada, the input rating must be derated 5% (Natural Gas) and 10% (Propane Gas) for altitudes of 2,000 to 4,500 (609.6 to

1371.6m) above sea level. Use the 2001 to 3000 (609.9 to 914.4m) column in Table 4 and Table 5.

Changing Orifices

FIRE, EXPLOSION, CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in per- sonal injury, death and/or property damage.

This high-altitude gas-conversion shall be done by a qualified service agency in accordance with

the Manufacturer's instructions and all applicable

codes and requirements, or in the absence of local codes, the applicable national codes.

21 Specifications are subject to change without notice 44101 202301

After disconnecting power and gas supply to the furnace,

remove the burner compartment door, exposing the burner compartment.

Disconnect gas line from gas valve so manifold can be re- moved.

Disconnect wiring at gas valve. Be sure to note the proper location of all electrical wiring before being disconnected.

Remove the four (4) screws holding the manifold and gas

valve to the manifold supports. Do not discard any screws.

See Figure 17.

Manifold

FinalGas PipingCheck

FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in

personal injury and/or death. Never test for gas leaks with an open flame. Use a

commercially available soap solution made specifically for the detection of leaks to check all

connections.

5. Carefully remove the manifold assembly.

6. Remove the orifices from the manifold and replace them with proper sized orifices. See Figure 18.

7. Tighten orifices so they are seated and gas tight. See

Figure 18.

8. Reassemble all parts in reverse order as removed. Be sure to engage the main burner orifices inthe proper openings in

the burners.

9. After reassembling, turn gas on and check all joints for gas

leaks using a soapy solution. All leaks must be repaired im- mediately.

Changing Orifices

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Measurefrom face of orifice

RISQUE D'EXPLOSION ET D'INCENDIE Le fait de ne pas suivre cet avertissement pourrait

entrainer des dommages corporels et / ou la mort.

Ne jamais examiner pour les fuites de gaz avec une

flamme vive. Utilisez plut6t un savon fait specifiquement pour la detection des fuites de gaz

)our verifier tous les connections.

The furnace and the equipment shut off valve must be dis-

connected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2" PSIG (3.5 Pa). Close the manual shut-off valve be-

fore testing at such pressures.

The furnace must be isolated from the gas supply system

by closing the equipment shut off valve during any pressure

testing of the gas supply system at test pressure equal to or

less than 1/2" PSI (3.5 Pa).

When installation is complete, test all pipe connections for

leaks with the gas pressure less than 1/2" PSlG (3.5 Pa) to

the gas valve.

Apply a commercial soap solution to all joints to test for

leaks. Correct any leaks indicated by bubbles. Correct even the smallest leak at once.

Check for leaks at gas valve and orifice connections to the burner manifold along with the pilot tube connections to the

valve and pilot assembly while the furnace is operating.

9. Electrical Wiring

Field wiring connections must be made inside the furnace connec-

tion box. A suitable strain relief should be used at the point the

ELECTRICAL SHOCK HAZARD Failure to turn off power could result in personal

injury or death. Turn OFF electrical power at fuse box or service

panel before making any electrical connections and ensure a proper ground connection is made

before connecting line voltage.

PowerSupplyWiring

The furnace MUST be electrically wired and grounded in accor- dance with local codes, or inthe absence of local codes, with the National Electrical Code (NEC), NFPA 70-2008 inthe U.S., or the Canadian Electrical Code (CEC), CSA C22.1 in Canada.

The power supply to the furnace connections must be between

104 VAC and 127 VAC during furnace operation for acceptable

performance.

44101 202301 Specifications are subject to change without notice 22

wires exit the furnace casing. Copper conductors shall be used. Line voltage wires should

conform to temperature limitation of 35° C rise. Wire and circuit

breaker sizing shall be based on the ampacity ofthe furnace elec-

trical components plus the amps for all installed accessories (1.0 amps total for EAC and HUM). Ampacity can be determined by us-

ing the NEC or CEC. NOTE: Furnace will not have normal operation is line polarity is

reversed. Check ALL field and control connections prior to opera-

tion.

Furnace must be installed so the electrical components are pro-

tected from water and connected to its own separate circuit.

JunctionBox (J-Box)Relocation

The J-Box is installed in the burner compartment on left side of casing. An alternate J-Box location on right side can be used.

1. Remove and save two screws holding J-Box to casing.

2. Move large hole plug from right to left J-Box location.

3. Clip wire tie holding J-Box wires if needed.

4. Move J-Box to alternate location and attach using two screws removed from left side location.

5. Position all wires away from hot surfaces, sharp edges, and moving parts. Do not pinch J-Box wires or other wires when

reinstalling burner compartment door.

Thermostat

Heating

The two-stage furnace control board wilt operate with either a single stage or a two-stage heating thermostat and wilt provide

two-stage heating operation. For single-stage thermostat installations, the R and W wires

from the thermostat connect to the R and Wl connections on the furnace control board.

Note: The TT (Thermostat Type) SW1 DIP switch # 3 should be in the off position for the furnace to operate properly with a single-

stage thermostat. Failure to change DIP switch with single-stage thermostat wilt result in Low Heat operation ONLY. (See

Figure 21 and wiring diagram) During operation, the furnace will operate on tow Heat for up to12

minutes. If the heat request exists for more than 12 minutes, the furnace wilt automatically shift to the high Heat mode for the re- maining duration of the heating cycle.

For two-stage thermostat installations, the R, Wl and W2 wires from the thermostat connect to the R, Wl and W2 connections on

the furnace control board. Set TT SW1 DIP switch #3 to ON posi- tion. During operation, the furnace will shift from Low Heat to High Heat as requested by the thermostat. (See Figure 19, Figure 20

and wiring diagram) Heat anticipator setting will need to be measured if 24VAC humidi-

fier is installed. Measure current in series from Rto Wl at the ther- mostat. Be sure 24VAC humidifier is wired up to control. Allow

furnace to operate for two minutes before recording the AC am- perage reading. Set anticipator on thermostat to recorded value.

Thermostat location has an important effect on the operation of the furnace. Follow instructions included with thermostat for cor-

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

board to furnace control board. (See Figure 19 and Figure 20)

Cooling

*8MPT

If cooling is used, the Y and G from the thermostat must be con- nected to the control board Y/Y2 and G to energize cooling blower

speed. NOTE: MPT models are not two-stage cooling compatible.

*8MPV

If single-stage cooling is used, the Y and G from the thermostat must be connected to the control board Y/Y2 and G to energize

cooling blower speed.

Iftwo-stage cooling is used, the Y1, Y2, G off the thermostat must be connected to Y1 of the tap select interface board for Low Cool- ing, Y/Y2 of the furnace control board for High Cooling and G ofthe

furnace control board for continuous fan speed.

Optional Equipment

All wiring from furnace to optional equipment MUST conform to

local codes or, inthe absence of local codes with the latest edition

of The National Electric Code, NFPA 70 and/or The Canadian

Electric Code CSA C22.1. Install wiring in accordance with manufacturer's instructions. The wiring MUST have a minimum

temperature rating of 105° C.

Humidifier/Electronic Air Cleaner

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

HUMIDIFIER - The HUM (24V) terminal is energized when

the tow pressure switch closes on a call for heat. The HUM

(115V) is energized when the inducer is energized. ELECTRONICAIR CLEANER - EAC is energized when there

is a blower speed call, except it is NOT energized when blower

operates in the hard-wired continuous fan mode.

REDUCED FURNACE LIFE HAZARD

Failure to follow caution instructions may result in reduced furnace life.

Do NOT exceed 115V/1.0 amp. maximum current load for both the EAC terminal and the HUM

terminal combined.

Furnace Control Board

The furnace control board has a fixed blower ON delay of 30 seconds for High Heat calls and 45 seconds for Low Heat calls. The blower OFF timing is factory preset at 140 seconds. If desired, the fan OFF delay can be reset to obtain the longest delay times while still maintaining comfort levels. See "Furnace Wiring

Diagram".

Dehumidification- Variable Speed ONLY (*8MPV)

The furnace control board has a dehumidification feature which

reduces cooling airflow by 20% when the DEHUM terminal [1/4" (6.4mm) male quick connect] is energized by 24VAC and there is a

cooling call. DEHUM may be operated by athermostat dehumidify

(24VAC for dehumidify) command or a dehumidistat (switch

closes on call for dehumidification) with one terminal connected to

(Y1 for two-stage cooling or Y/Y2 for single-speed cooling

applications) and the other terminal connected to DEHUM

23 Specifications are subject to change without notice 44101 202301

Electrical Connections

*8MPV

NOTE:Junction Boxcan be mountedto eitherthe left or right side.

115M 60 Hz.

Ground

I LowVoltage ITerminalBoard

I I

I r

_ SingleStage

Thermostat

LowVoltage

TerminalBoard

.......

_ TwoStage '

TheLmostat jI

Motor Control

NOTE:115VAC/60Hz,/single-phase Operatingvoltagerange*:127VACmax,104VACrain,

* Permissiblelimitsofvoltageatwhichunitwill operatesatisfactorily

Electrical Connections

*8MPT

NOTE:Junction Box canbe mountedto eitherthe left or right side.

115M 60 Hz.

Variable Speed

Motor

25-25-06

Control Connections

Furnace Control Fuse

The 24V circuit contains a 5-amp, automotive-type fuse located on furnace control board. (See Figure 21) Any electrical shorts to 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.).

TapSelectInterfaceBoard(*8MPV)

The Tap Select Interface Board is used with the Variable Speed

motor. There are DIP switches (SW2) for continuous blower adjust, heating blower adjust, cooling blower adjust and cooling on/off delay profiles. There is a jumper (J1) for slight blower adjustment, increase (+)/no change (NOM)/decrease (-). There is a jumper (J2) for airflow selection of Heat Pump EFFICIENCY or COMFORT. (EFFICIENCY provides no airflow reduction in airflow whether O is energized or not. COMFORT provides a 10%

reduction in airflow when O is not energized with a cooling call). The O terminal is available for use for Heat Pump applications, if

desired. The Y1 terminal (if atwo-stage Air Conditioner or two-stage Heat

Pump is used) will provide low cooling blower speed when energized. (Only Y/Y2 on the furnace control board is used if a single-stage Air Conditioner or Heat Pump is installed)

25-25-06a

NOTE:115VAC/60Hz,/single-phase Operatingvoltagerange*:127VACmax,104VACrain,

* Permissiblelimitsofvoltageatwhichunitwill operatesatisfactorily

44101 202301 Specifications are subject to change without notice 24

10. Ductwork and Filter (Upflow/Horizontal)

DuctInstallationRequirements

CARBON MONOXIDE POISONING HAZARD Failure to properly seal duct could result in

personal injury or death. Do NOT draw return air from inside a closet or utility

room where furnace is located. Return air duct MUST be sealed to furnace casing.

Duct Connections

This furnace may be installed in only a bottom or side return ap- plication. Return air through the back of the furnace is NOT al-

lowed.

Side connections can be made by cutting out the embossed area shown in Figure 22. A plugged hole is provided at each furnace side duct location to help start cutting the opening.

Cutting Side Return Air Opening

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Knockout

Starting

Hole

When afurnace is installed so that supply ducts carry air cir-

culated by the furnace to areas outside of the space con-

taining the furnace, the return air shall also be handled by

duct(s) sealed to the furnace casing and terminating out-

side the space containing the furnace.

CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in

personal injury or death. Cool air passing over heat exchanger could cause

condensate to form resulting in heat exchanger

failure.

When the furnace is used with a cooling unit, the furnace shall be installed parallel with or on the upstream side of the

cooling unit to avoid condensation in the heating element.

With a parallel flow arrangement, the dampers or other

means used to control flow of air shall be adequate to pre- vent chilled air from entering the furnace. Chilled air going through the furnace could cause condensation and shorten

furnace life. Dampers (purchased locally) can be either au- tomatic or manual. Manually or automatically operated

dampers MUST be equipped with a means to prevent fur-

nace and air conditioning operation, unless damper is in the full heat or coot position.

Installation of locking-type dampers is recommended in all

branches, or in individual ducts to balance system's air flows.

Non-combustible, flexible duct connectors are recom-

mended for return and supply connections to furnace.

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.

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

return.

DuctDesign

Design and install air distribution system to comply with Air Condi- tioning Contractors of America manuals or other approved meth-

ods that conform to local codes and good trade practices.

When the furnace is located in an area near or adjacent to the liv- ing area, the system should be carefully designed with returns to

minimize noise transmission through the return air grille. Any blower moving a high volume of air will produce audible noise

which could be objectionable when the furnace is located very close to a living area. It is often advisable to route the return air ducts under the floor or through the attic.

• Ductwork installed in attic or exposed to outside tempera- tures requires a minimum of 2" (50.8mm) of insulation with

outdoor type vapor barrier.

• Ductwork installed in an indoor unconditioned space re-

quires a minimum of 1" (25.4mm) of insulation with indoor

type vapor barrier.

Inspection Panel onsome models

For a furnace not equipped with a cooling coil, the outlet duct shall be provided with a removable access panel. This opening shall be

accessible when the furnace isinstalled and shall be ofsuch a size that the heat exchanger can be viewed for possible openings us-

ing light assistance or a probe can be inserted for sampling the air

stream. This access cover shall be attached in such a manner as to prevent air leaks.

Filters

• Refer to furnace Technical Support Manual (Blower Data)

for air flow information.

• Size ductwork to handle air flow for heating and air condi- Filters are supplied with these furnaces, and additional filters may tioning, be purchased from your distributor.

25 Specifications are subject to change without notice 44101 202301

A filter MUST be used.

See Table 6 for required high-velocity filter sizes.

High Velocity Air Filter Sizes (max.600 FPM)

Internal

Cabinet Filter External Filter Rack

Width in(mm)

in (mm)

151/2 14X25 14X25 14 X 25 (355.6 x 635)

(393.7) (355.6 x 635) (355.6 x 635) or 16 X 25 (508 x 635)*

Bottom Bottom Side+

191/8 16X 25 * 16X 25 16 X 25

(485.8) (406.4x 635) * (406.4 x 635)* (406.4x 635)*

223/4 20 X 25 20 X 25 16 X 25

(577.9) (508 x 635)* (508x 635)* (508 x 635)*

* Greater than 1600 CFM with a maximum of 2000 CFM requires both (left and right)

side return filter racks or for single return in an upflow application, must use filter rack NAHA001TK. See Figure 23.

+ Side return air duct(s) is not permitted with horizontal or downflow furnace installa-

tion.

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 with external filter grille.

REDUCED FURNACE LIFE HAZARD Failure to follow caution instructions may result in

reduced furnace life. Use of excessively dirty and/or restrictive air filters

may increase furnace operating

temperatures and shorten the life of the furnace.

Filters supplied with the furnace are rated at a maximum of 600 fpm air velocity and sized for the

furnace's airflow rate. Replacement filters must be

of equivalent type, size, and rating except as described below.

Disposable, low-velocity filters may be used to replace washable, high-velocity filters, providing

they are sized for 300 FPM or less.

NOTE: Disposable, low-velocity filters may be replaced with

washable, high-velocity filters providing they meet the minimum size areas for 300 FPM or less. Washable, high-velocity filters can be replaced ONLY with same type and size filter.

ii _)}i i

Optional Duct Standoff- NAHA001TK in(mm)

_i i2o

_o8

18_2 (470) i

20 x 25 (508 Optional Filter Rack

(175)

Filter

FiltersRackInstallation

Side Return

Center the filter rack on the side panel, flush with the bottom edge of the furnace. Mark the fastening holes. Drill the fastening holes

in the side panel and fasten the filter rack in place with sheet metal

screws. See Figure 24 & Figure 25.

iii i ii:: _

The furnaces with 1600 or less CFM rating are supplied with a 16" x 25" (406 x 635mm) high-velocity filter and

rack. On these models the supplied filter may be installed internally for bottom return or the supplied filter and rack

may be mounted externally for bottom return.

The furnaces with greater than 1600 CFM to 2000 CFM

may require that bottom return or both (left and right) side

Filter

25-23-05-1

Filters Installed on Two Sides

returns are used or for single side return in upflow applica-

tion, must use filter rack NAHA001TK. Two side return fil- ters and racks are required. Filter racks must be mounted

UsingTwo FilterRacks

externally. (See Figure 23 and Figure 24.) If return air

must be on one side only, an optional 20" x 25" (508 x

635mm) filter standoff rack kit can be used. (See

Figure 23.) For bottom return, an internal filter can be used

or a filter rack kit can be mounted externally. See Technical Manual, Circulation Air Blower Data for addi-

tional information.

NOTE: The 20" x 25" (508 x 635mm) standoff side filter rack gives more filter area but does not provide more air. (See

Figure 23.) To achieve 2000 CFM 2side returns may be required.

(See Figure 25.)

44101 202301 Specifications are subject to change without notice 26

Filter

25-23-05-3

Internal Filterin Bottom ReturnInstallation

When installing _bottom-mounted filter inside the furnace, install the filter clips on the edge of the bottom duct opening with the wid- er end of the clips toward the blower, as shown in Figure 26. Clips

may be obtained from your distributor or fabricated from sheet metal (Figure 27). Insert filter into side clips first and push filter back until it is fully engaged into back clip.

Bottom Mounted Filter

CenterClip ,/ side to side _

Filter Clip Construction in(mm)

Note: If filters are only suitable for heating application, advise homeowner that filter size may need to be increased if air condi-

tioning is added.

Addition OfAir Conditioning

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

must be installed on the discharge side of the furnace to avoid

condensation on the heat exchanger. All furnaces are designed with a break-away duct flange on the supply air side of the fur-

nace. This allows for installation in the horizontal right or downflow

applications. The coil installation instructions must be consulted for proper colt location and installation procedures. With a parallel

flow arrangement, dampers must be installed to prevent chilled air from entering the furnace. If manually operated dampers are

used, they must be equipped with ameans to prevent operation of

either unit unless the damper is in full heat or full cool position. Copper or plastic tubing may be used for the condensate drain

line.

_._'(38.1) _ --.. . _,,

\\\ -\\\\ ;J _7t2)

\>\ \ J T

26 Ga.Galvanized Steel "_.\ FASTpart number1008482 _'\_,/ 11/16" (27)

11. Ductwork and Filter (Downflow)

CARBON MONOXIDE POISONING HAZARD Failure to properly seal duct could result in

personal injury or death. Do NOT draw return air from inside a closet or utility

room where furnace is located. Return air duct MUST be sealed to furnace casing.

FIRE HAZARD Side return air duct(s) could cause excessive

furnace and/or air temperatures, which could result in personal injury, death and/or property

damage. Return air duct is to be connected to only the top of

downflow furnace.

BURN HAZARD Failure to properly install vent shield could result in

personal injury or death.

The vent may be hot.

Vent Shield

A vent shield is required for all downflow installations. The vent

Must exit out the side of the furnace for all downflow installations.

This places the hot vent pipe (over 300°F) within reach of children. The vent shield attaches to side of furnace to cover vent pipe. See

Figure 4 in "Installation" section.

Outlet Duct Flange

Downflow installations with cased coils require the furnace outlet

duct flange to be bent outward and flat to mate the outlet of the fur-

nace to the cased coil.

27 Specifications are subject to change without notice 44101202301

FIRE HAZARD Failure to install furnace on noncombustible

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

Place furnace on noncombustible subbase on downflow applications, unless installing on

non-combustible flooring.

Sub-Bases for Combustible Floors- Furnace Only

Note: When using the subbase for combustible floors, the dis- charge air duct flanges on the furnace MUST be broken down to

provide proper fit up to the subbase. Use duct pliers to bend the duct flanges flat onto the furnace casing. DO NOT bend the duct

flanges inward (toward the heat exchangers) as air flow restric- tions may occur.

Sub-bases for Combustible Floors Dimensions in(mm)

Sub-base for

Combustible Floors

Part Number H*

Subbase for Furnace Only

NAHH001SB

NAHH002SB

NAHH003SB

Subbasefor Coil Box

NAHH004SB

NAHH005SB

NAHH006SB

OutsideDimension

** BaseSpacerSideToSide

23 (284.2)

Sub-base for Combustible

Floor Dimensions

1511/16 (398.5)

195/16

(490.5)

221b/16

(582.6)

153/4 (25.4)

193/8

(181.1)

283/4(730.3)

283/4 (730.3)

209/16

(522.3)

209/16

(522.3)

209/16

(522.3)

K _

149/16(369.9) 16(406.4)

183/16 (462) 16(406.4)

2113/16(554) 16(406.4)

149/16(369.9) (408)

183/16 (462) 161/16

2113/16(554) (408)

161/16

(4o8)

161/16

The Sub-base 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 the dimensions in Table 7 because the base is equipped with locating tabs that center the base over the opening.

The opening in the base is 11/4" (31.8mm) shorter and 11/8"

(28.6mm) narrower than the minimum required size of the

opening in the floor. This is done to maintain a 1" clearance

between the floor and the plenum.

2. Fabricate the plenum to the dimensions given in Table 7. Note that the dimensions given are outside dimensions.

3. Set the base over the opening in the floor, centering the open- ing in the base over the opening in the floor. Fasten the base

to the floor with screws or nails. See Figure 28 and

Figure 29.

4. Drop the plenum through the opening in the base. The flange

of the plenum should rest on top of the combustible floor

base.

Opening In Floor

161/4

(412.8)

161/4

(412.8)

161/4

(412.8)

161/4

(412.8)

161/4

(412.8)

161/4

(412.8)

145/8

(371.5)

181/4

(463.6)

21//8

(555.6)

145/8

(371.5)

181/4

(463.6)

21//8

(555.6)

Opening In

Base For Plenum

15(381)

131/2

(342.9)

171/8

(435.6)

19_/4

(501.7)

131/2

(342.9)

171/8

(435.6)

19_/4

(501.7)

Typical Plenum

Dimensions

S T

15(381)

131/2

(342.9)

171/8

(435.6)

19_/4

(501.7)

131/2

(342.9)

171/8

(435.6)

19_/4

(501.7)

i ii

: ; r_i_u_'=°; Furnace ONLY

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Exploded View of Sub-Base for

z"_<3_r__ s A = 4 1/4" (108mm) Minimum

_1 .... _" clearance from back of hole

S_ Plenum _: to wall or other obstruction.

Sub-base for CombustibleFloors- Downflow Coil Adapter Box

The sub-base for combustible floors is not required when a down- flow furnace, used with a downflow coil box, is set on combus-

tible flooring.

1. Cut the opening in the floor according to the dimensions in Table 7 because the base is equipped with locating tabs

that center the base over the opening. The opening in the base is 11/4"(31.8mm) shorter and 11/8"

(28.6mm) narrower than the minimum required size of the

H_ _ 2" (50.8mm)

opening in the floor. This is done to maintain a 1" (25.4mm) clearance between the floor and the plenum.

2" (50.8mm)__'_ 1" (25.4mm)

44101 202301 Specifications are subject to change without notice 28

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Sett,n t.e ase

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Furnace, /;- j \ z _.. ,

Subbase __

Insulation l i

'_, i

_-_ ;; _ WoodFloor

height of the subbase raises the downfiow coil off the floor to allow

easy installation of the condensate drain

Condensate Line Raised by Base

WoodScrew Plenum

25-20-46A

Non-Combustible Floor

Fabricate the plenum to the dimensions given in Table 7. Note that the dimensions given are outside dimensions.

Set the base over the opening in the floor, centering the opening in the base over the opening in the floor. Fasten

the base to the floor with screws or nails. See Figure 30 and Figure 31.

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.

DuctConnections

Inthe downfiow position, the return-air duct must be connected to

only the top of the furnace. Top return connections can be made

by removing the knockout panel in the furnace base. Return air

Exploded View of Base for

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Downflow Cased Coil

connection through the side(s) or back of the furnace is NOT al-

lowed.

DuctDesign

Design and install the air distribution system to comply with Air

Conditioning Contractors of America manuals or other approved

methods that conform to local codes and good trade practices.

When the furnace is located in an area near or adjacent to the liv-

ing area, the system should be carefully designed with returns to minimize noise transmission through the return air grille. Any

blower moving a high volume of air wilt produce audible noise which, could be objectionable when the furnace is located very close to a living area. It is often advisable to route the return air ducts under the floor or through the attic.

Refer to furnace Technical Support Manual (Blower Data)

for air flow information.

Size ductwork to handle air flow for heating and air condi-

tioning, if used.

Duct

Installation Requirements

When afurnace is installed so that supply ducts carry air cir-

culated by the furnace to areas outside of the space con-

taining the furnace, the return air shall also be handled by

duct(s) sealed to the furnace casing and terminating out-

side the space containing the furnace.

i J;;: J iJJ J; J i Ji;JJ

_:_i:iiiil Setting the Base

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Coil

Subbase

Insulation

21/2" (63.5mm)

11/2" (38.1mm)

--_\_-_-/z 25-20-52

.........

CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in per-

sonal injury or death.

"_'_J_ i "_..'_'_ Wood Floor

Install cooling coil on furnace discharge. Cool air passing over heat exchanger could cause

WoodScrew ' // // _'_ Plenum 25-20-46A

condensate to form resulting in heat exchanger failure.

Consideration must be given to the height of the base to allow for easy installation of the condensate drain. See Figure 32. This

subbase for combustible floors has been designed so that the

• When a furnace is used with a cooling unit, the furnace shall be installed parallel with or on the upstream side of the

cooling unit to avoid condensation in the heating element.

29 Specifications are subject to change without notice 44101 202301

• With a parallel flow arrangement, the dampers or other means used to control flow of air shall be adequate to pre-

vent chilled air from entering the furnace. Chilled air going through the furnace could cause condensation and shorten

furnace life. Dampers (purchased locally) can be either au- tomatic or manual. Manually or automatically operated dampers MUST be equipped with a means to prevent fur-

nace and air conditioning operation, unless damper is in

the full heat or cool position.

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

flows.

12. Checks and Adjustments

Startup

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

• 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.

• Ductwork installed in attic or exposed to outside tempera-

tures requires a minimum of 2" (50.8mm) of insulation with

outdoor type vapor barrier.

• Ductwork installed in an indoor unconditioned space re- quires a minimum of 1" (25.4mm) of insulation with indoor

type vapor barrier.

NOTE: Refer to startup procedures in the Users Information Manual.

ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD

Failure to followthis warning could result in injury, death, and/or property damage.

If any sparks, odors or unusual noises occur, immediately shut OFF gas and power to furnace. Check for wiring errors or obstruction to blower.

GasSupply Pressure

Gas supply pressure should be within minimum and maximum values listed on rating plate. Pressures are usually set by gas sup-

pliers.

ManifoldGasPressureAdjustments

(High and Low Heat)

NOTE: Make adjustment to manifold pressure with burners oper-

ating.

Typical Gas Control Valve Honeywell

Regulator

FIRE OR EXPLOSION HAZARD Failure to turn OFF gas at shut off before

connecting manometer could result in personal

injury, death and/or property damage.

Turn OFF gas at shut off before connecting

manometer.

1. With gas OFF, connect manometer to manifold pressure

tap on the outlet of gas control valve. See Figure 33. Use a

manometer with a 0 to 12 in wc (0 to 2989 Pa) range.

2. Turn gas ON. Operate the furnace on High Heat by using a jumper wire on the R to Wl & W2 thermostat connections

on the furnace control board.

3. Remove manifold pressure adjustment screw cover on fur-

nace gas control valve. Turn adjusting screw counterclock-

wise to decrease the manifold pressure and clockwise to

increase pressure. See Figure 33.

NOTE: Adjustment screw cover MUST be replaced on gas control

valve before reading manifold pressure and operating furnace.

4. Set manifold pressure to value shown in Table 5 or Table 4.

5. Operate the furnace on Low Heat by using a jumper wire on the R to Wl thermostat connections on the furnace control

board. Note: The SWl DIP switch #3 should be in the on position

to set the Low Heat manifold pressure. (See wiring dia-

gram.)

6. Repeat steps 3 and 4 for Low Heat operation.

7. When the manifold pressures are properly set, replace the adjustment screw covers on the gas control valve.

8. Remove the jumper wires from the thermostat connections on the furnace control board. Remove manometer connec-

tion from manifold pressure tap, and replace plug in gas valve.

9. Return SWl DIP switch #3 to previous setting.

10. Check for leaks at plug.

Natural GasInput RatingCheck

The gas meter can be used to measure input to furnace. Check with gas supplier for actual BTU content.

1. Turn OFF gas supply to all appliances other than furnace and start furnace. Use jumper wire on R to Wl and W2 for

OUTLET

25-24-98a

44101 202301 Specifications are subject to change without notice 30

Pressure

Tap 1/8"

High Heat.

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

ample.

3. Repeat step 2 with jumper wire on R to Wl for Low Heat. NOTE: If meter uses a 2 cubic foot dial, divide results (sec-

onds) by two.

NOTE: SWl DIP switch #3 must be in ON position. (See

furnace wiring diagram). Return SWl DIP switch #3 to pre- vious setting after check.

Refer to Example. The Example is based on a natural gas BTU content of 1,000 BTU's per cubic foot.

Example

NaturalGas

BTUContent

percu.foot

1,000

No.ofSeconds TimePerCubic

PerHour FootinSeconds

3,600 48

BTUPer

Hour

75,000

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

To Determine the appliance kW input rate from a .05m3 test dial that has been clocked at 80 seconds for one complete revolution.

Example (kW)

Number of

seconds per

hour

3,600

Number of

seconds per Size of test dial

complete (.05m 3)

rotation

80 .05

3,600 + 80 x .05 = 7.2 m3/h

2.25m3/h x 10.35 kWh/m3 = 23.28 kW

23.28 X 3.412 = 79,431 BTU

kW m3/h

2.25

4. Remove jumper wire from R to Wl and W2.

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

CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in

personal injury or death. NOx inserts for use with Natural Gas units ONLY.

If Propane Gas is required, NOx inserts must be removed.

Ignitor Location in(mm)

21/16(52.4)

NOTE: Flame sensor has a different orientation in all 050 models.

TemperatureRiseCheck

REDUCED FURNACE LIFE HAZARD Failure to properly set the air temperature rise may

result in reduced furnace life.

Use ONLY the blower motor speed taps marked "Y" for

YES for setting air temperature rise.

BlowerMotor SpeedTaps for *8MPT Model Sizes

Model Heat LO M LO M HI HI

Sizes Stage RED BLUE ORN BLK

050B12 HI N Y Y N

075F14 HI N Y Y Y

100F14 HI N N Y Y

100J20

125J20

LO N Y Y Y

LO Y Y N N

HI N N Y Y

LO N N Y Y

HI N N Y Y

MainBurnerFlameCheck

Allow the furnace to run approximately 10 minutes. Then inspect the main burner flames. See Figure 34.

Check for the following (Figure 34):

• Stable and blue flames. Dust may cause orange tips or

wisps of yellow, but flames MUST NOT have solid, yel- low tips.

• Flames extending directly from burner into heat ex-

changer.

• 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.

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 is the 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 on High Heat for ten minutes with all the registers and duct dampers open by using a jumper wire on

R to Wl and W2 thermostat connections on the furnace control board.

Note: The SWl DIP switch #3 should be in the on position.

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

(See furnace wiring diagram)

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

4. If the air temperature rise is not in the correct range, the

r Face

blower speed must be changed. A higher blower speed will lower the temperature rise. A lower blower speed will in- crease the temperature rise.

5. Repeat steps 2 thru 4 with the furnace operating on Low

__ _-10-78

Heat for 10 minutes by using a jumper wire on the R to Wl

thermostat connections on the furnace control board.

Remove the jumper wire after the adjustments are com-

For ignitor location see Figure 35.

plete. Return SWl DIP switch #3 to previous setting.

31 Specifications are subject to change without notice 44101 202301

BlowerAdjustments(*SMPT)

ChangingBlower Speed

ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in

personal injury or death.

Turn OFF power to furnace before changing

speed taps.

Hard-Wired ContinuousFan

A terminal is provided on the furnace control board located in the circulating air blower compartment for operation of the continuous fan option. This connection isintended for the tow 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, it wilt provide low speed blower operation whenever the other three speeds ("HI HEAT or LO HEAT" or COOL) are not energized.

Thoroughly check the system after modification to ensure the

proper operation ofthe circulating air blower in all modes of opera-

tion.

NOTE: The speed taps that the manufacturer sets at the factory for this furnace are based on a nominal 400 CFM per ton for cool-

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

that will be applied to the furnace, it is the responsibility of the installer dealer/contractor to select the proper blower motor speed leads for the application when the furnace is

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

1. Refer to Furnace Wiring Diagram for location of the heating and cooling speed taps located on the furnace control board

as well as location of unused blower motor speed leads. Use

the chart (Table 8) to determine the blower motor speed set- tings.

Wire Color

Black

Orange*

Blue

Red

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

Change the heat or coot blower motor speed by removing the motor lead from the "HI HEAT or LO HEAT" or "COOL" termi-

nal and replace it with the desired motor speed lead from the "MI" or "M2" location. Connect the wire previously removed

from the "HI HEAT or LO HEAT" or "COOL" terminal to the

vacated "M1" or "M2" terminal.

Ifthe same speed must be used for both heating and cooling, remove the undesired motor speed lead from the "HI HEAT

or LO HEAT" or "COOL" terminal and connect that lead to

the open terminal at "M1" or "M2" location or tape off. Attach

a jumper between the "HI HEAT or LO HEAT" and "COOL"

terminals and the remaining motor speed lead.

NOTE: When using the same speed on motors with (4) speed leads, it will be necessary to tape offthe terminal of the motor

speed lead removed from the "HI HEAT or LO HEAT" or "COOL" terminal with electrical tape since an open terminal

will not be available at the "M1" or "M2" location.

Motor Speed

High

Med-High

Med-Low

Low

Continuous- Fan using"G"

Energizing the "G" terminal on the furnace control board provides continuous fan operation. This is done by connecting the G

terminal of the thermostat to the G terminal on the furnace control board. When the FAN switch is turned from auto to ON the fan will

operate continuously at"LO HEAT" speed. EAC will be energized in this mode.

NOTE: In heating, the fan will turn off during furnace ignition and warm up then restart at heating speed.

Separate Speed Selections for Low Heat, High Heat, Cool, and Continuous-Fan

Connect tow speed lead from circulating air motor to the "CONT" terminal atthe furnace control board. The appropriate motor leads should already be connected to the "HI HEAT and LO HEAT" and

"COOL" terminals.

Heating and Continuous-Fan Speed the Same

If it is necessary to operate the Low Heat speed and continuous-fan speed using the same blower speed, connect a jumper between the "LO HEAT" and "CONT FAN" terminals on

the furnace control board.

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

HEAT" and "CONT FAN" terminals.

BlowerAdjustments(*SMPV)

Changing BlowerSpeed

ELECTRICAL SHOCK HAZARD

Failure to disconnect power could result in personal injury or death.

Turn OFF power to furnace before changing blower speed.

NOTE: The blower speeds that the manufacturer sets from the factory for this product are based on a nominal 400 CFM per ton cooling and the mid range on the temperature rise for heating.

Since the manufacturer cannot predict the static pressure that will be applied to the furnace, it is the responsibility of the

installing dealer/contractor to select the proper speeds for the application when the furnace is installed.

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

1. The 115 VAC power supply to the furnace must be turned OFF before making adjustments to the motor.

NOTE: Allow at least 1 minute before restoring power to the

furnace after making Blower Control changes.

The heating, cooling and continuous blower speeds can be

adjusted by changing the SW2 DIP switch settings that are located on the Tap Select Interface Board (see Figure 36).

* Switches #1 and #2 adjust the continuous blower speeds.

Switches #3 and #4 adjust the heating speed. Switches #5 and #6 adjust the cooling speed.

Switches #7 and #8 adjust the cooling speed on/off delay profiles. See the "Technical Support Manual" for the switch

settings for the desired airflow rates for the installation. The jumper J1 is used to slightly increase (+) or decrease

(-) or not change (NOM) the blower speed selected from SW2. J1 effects BOTH cooling and heating airflow.

* Continuous blower selection DIP 10 and 11 will cause the

blower to run in high cooling speed for all low cooling (Y1) calls. Continuous blower DIP settings of 00 and 01 will allow low cooling (Y1) calls to operate normally.

44101 202301 Specifications are subject to change without notice 32

Continuous- Fan using"G"

and DIP SW2 switch #2. EAC will beenergized in this mode.

Energizing the "G" terminal on the furnace control board provides continuous fan operation. This is done by connecting the G

terminal of the thermostat to the G terminal on the furnace control board. When the FAN switch is turned from auto to ON the fan wilt

operate continuously at airflow selected by DIP SW2 switch #1

Variable Speed (*8MPV) Tap Select Interface Board (TSIB)

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

• 0 0 0 •

iiiiAC?i_:lJo E_=

BRN C - YE [_1

_, I ............ I_1 l [] ............... _;

_oi_vnnnnnnnn_/_°_c°::°:z'°__

........O '___

___

ON = 1

NOTE: In heating, the fan will not turn off during furnace ignition

and warm up.

HardWired ContinuousFan Operation

Notavailablefor variablespeed models.

HP MODE SELECTION /

!r Ir

OFF = 0

CONTINUOUS

CFM SELECTI II _E_T'"_s_IIC°°L"°CF_IICOO'"_O_'OFFSELECT SELECT DELAY PROFILES

13. Furnace Maintenance

FIRE, EXPLOSION, OR CARBON MONOXIDE POISONING HAZARD

Failure to have the furnace inspected and maintained could result in personal injury, death,

and/or property damage. It is recommended that the furnace be inspected

and serviced on an annual basis (before the heating season) by a qualified service agency.

HEAT PUMP EFFICIENCY OR I

HP COMFORT SELECT ON I

25 25 54

ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in personal injury, death, and/or property damage.

• Before servicing, disconnect all electrical power to furnace.

• When servicing controls, label all wires prior to disconnecting. Reconnect wires correctly.

• Verify proper operation after servicing.

See "User's Information Manual".

33 Specifications are subject to change without notice 44101202301

14. Sequence of Operation & Diagnostics for *8MPT

The following is the normal operating sequence at factory default settings (SWl OFF/ON/OFF)

Cooling(Y) Request:

24VAC signals applied to Y/Y2 & G terminals of FCB (furnace control board).

• Cool motor speed is energized after 5 second Cool Fan On Delay time. Y/Y2 & G signals removed from FCB

• Coot motor speed is de-energized after 90 second Coot Fan Off Delay time.

NOTE: DEHUM not available on the *8MPT models.

ContinuousCirculatingFan(G) Request:

24VAC signal applied to G terminal of FCB.

• Low-Heat motor speed is energized without delay. G signal removed from FCB.

• Low-Heat motor speed is de-energized after 5 second delay.

NOTE 1) Furnace de-energizes the fan during the heat exchanger warm-up period on a call for Heating that occurs during a G request unless a blower motor lead is connected to the CONT FAN terminal on the FCB, inwhich case see NOTE 2)

NOTE 2) Heating or Cooling requests received during a Fan request cause the fan speed to change to the appropriate heat or cool speed after the Fan On Delay time expires. The fan returns to continuous circulating speed after the selected Fan Off Delay time expires following toss of the Heating or Cooling request.

ContinuousCirculatingFanHard-Wired(Cont) Request:

Field selected low speed motor tap installed on "CONT FAN" terminal.

• Low speed is energized when power applied to furnace. Operates at this speed continuously while there are no other blower demands from furnace control board. Fan demands from furnace control board for heat, coot or"G" will override hard-wired

speed tap. NOTE 3) EAC is NOT active for hard-wired mode but IS active for fan demands from furnace control board for heat, cool and "G".

Heating(Wl) Request(singlestagethermostatoperation,SWl DIPswitch#3 mustbe in OFF

position)(see furnacewiringdiagram):

24VAC signal applied to Wl terminal of FCB.

• Inducer motor turns on at high speed.

• Following a 15 second prepurge delay after the low pressure switch closes, the ignitor begins a 17 second warm up.

• The gas valve is energized, the main burners light at Low Heat rate and flame is sensed.

• The ignitor is de-energized, and the inducer drops to low speed after the main burners ignite.

• The FCB will delay Low Heat blower operation for the 45-second Low Heat Fan On Delay time, timed from the opening of the gas valve.

• If the Wl request is still present after 12 minutes, timed from the opening of the gas valve, the inducer switches to high speed,

closing the high pressure switch, then the High Heat solenoid energizes, and the fan switches to High Heat speed.

W1 signal removed from FCB.

• The gas valve de-energizes and the main burners go out.

• The inducer runs at its present speed for a 15 second postpurge period.

• The fan runs at its present speed.

• The fan de-energizes after the selected Heat Fan Off Delay time expires, timed from the gas valve de-energizing.

NOTE 4) If anew Heating request arrives while the control iswaiting in the Heat Fan Off Delay time, the FCB will wait for the selected Heat Fan Off Delay then start a new heating cycle as long as the heat call remains.

HeatingRequest(Wl & W2) (two-stagethermostatoperation,SWl DIPswitch#3 must be in ON

position) (see furnace wiring diagram):

24VAC signal applied to Wl terminal of FCB.

• Same response as single stage thermostat operation (fan uses Low Stage Heat On Delay) described above except the control

will not go to High Heat rate, and High Heat Fan speed unless a W2 signal is applied.

24VAC signal applied to Wl and W2 terminals of FCB.

• Same light-off routine as described for the signal stage thermostat operation except main burners light at High Heat rate, the

inducer remains on high speed after ignition, and the FCB will delay blower operation at the High Heat Fan speed for 30 second On Delay time.

NOTE 5) The FCB responds without delay to the presence or loss of W2 (with W1 constant). W1 &W2 result in high inducer, High Heat rate, and High Heat Fan speed. Wl only results in low inducer, Low Heat rate, and Low Heat Fan speed.

44101 202301 Specifications are subject to change without notice 34

Heating Request with Gas Shut Off:

24 VAC signal applied to Wl terminal of FCB.

The FCB will attempt 4 cycles for ignition then go to soft lockout for 3 hours, and then try for ignition again as long as the heat call

remains. Power reset will clear lockout.

• Inducer motor turns on at high speed.

• Following a 15 second prepurge delay, the ignitor begins warm up.

• The ignitor glows red-hot for 22 seconds, then turns off. The FCB flashes error code 6.

• The ignitor

stays off for 17 seconds, then begins to warm up again. glows red hot for 22 seconds then turns off. The FCB continues flashing error code 6. stays off for 17 seconds, then begins to warm up again. glows red hot for 22 seconds then turns off. The FCB continues flashing error code 6. stays off for 17 seconds, then begins to warm up again.

The ignitor glows red hot for 22 seconds then turns off. The FCB proceeds to soft lockout. Stops flashing

error code 6, and begins flashing error code 6 + 1.

The inducer motor de-energizes after a 15 second post purge.

FurnaceControlBoardDiagnosticCodes (SeeFigure37):

OFF Heartbeat

ON SOLID

1 Flash 2 Flashes = 3 Flashes =

4 Flashes = 5 Flashes =

6 Flashes = 6 + 1 Flashes = 7 Flashes =

8 Flashes = 9 Flashes =

10 Flashes = NOTE: The 6 +

codes. * Ifstatus code recall is needed, briefly (2-3 seconds) remove then

reconnect one limit switch wire (main or rollout) to display last stored status code. Do not remove power or blower door before initiating status code recall or code wilt be lost. Code is automatically cleared after 72 hours or upon power reset.

* Properflame sense microamps: 0.7 microamps D.C. minimum,

2.0 - 4.0 microamps nominal

= 24VAC or 115VAC is off, fuse is open = Normal operation or no previous Diagnostic Code

= Soft Lockout - Furnace Control Error (1 hr delay)

If code repeats immediately following power reset then replace control

= Not used

Pressure switch(es) closed when should be open Low pressure switch open when should be closed

Limit or flame roll-out switch open (less than 2 minutes) Flame sensed out of sequence Failure to ignite or flame sense lost while running

Soft Lockout - Max of four trials for ignition reached (3hr delay) Soft Lockout - Limit or flame roll-out switch open longer than 2 minutes (1 hr delay) (roll-out switch requires manual reset)

Permanent Lockout - Gas valve relay contact stuck closed or miswired gas valve (power reset only) High pressure switch open when should be closed Line voltage polarity or improper transformer phasing on twinned applications

ii i: ii

1 designation indicates a combination of flash i __:

for switch se_tings _-_ t;( -.\\-%_ _.

Control Board

,,_ _%..._42J_

24VAC .......... _ , '

FUSE DEHUM

25-24-74

HUMIDIFIER - The 24VAC HUM is energized when the low pressure switch closes on a call for heat. The 115V HUM (called HUM on Control) is energized when the inducer is energized.

ELECTRONIC AIR CLEANER - EAC is energized when there is a blower speed call. Itis NOT energized when blower operates in

the hard-wired continuous fan mode.

35 Specifications are subject to change without notice 44101 202301

15. WiringDiagram*8MPT(TwoStageHeatingwith PSCMotor)

COOL ON DELAY: 5 SEC ]

I COOL OFF DELAY: 90 SEC

HiGH STAGE ]

I EAT ON DELAY 30 SEC. ]

I EAC + HUM 1.0A MAX

LOW STAGE I

HEAT ON DELAY 45 SEC. I

COMB NED

FURNACE CONTROL SWl HEAT OFF DELAY

SWl =1, SWl =2

_ 8 88 88 coz_

NEAT 0FF-DELAY HEAT 0FF-DELAY HEAT 0FF-DELAY H EAT 0FF-DELAY THERMOSTAT TYPE THERMOSTAT TYPE THERMOSTAT TYPE THERMOSTAT TYPE

THERMOSTAT TYPE

SWI =3

HEAT 0FFDELAY THERMOSTAT TYPE

CAPACH OR

44101 202301 Specifications are subject to change without notice 36

16. Sequence of Operation & Diagnostics for *8MPV

The following is the normal operating sequence at factory default settings (SWl OFF/ON/OFF, SW2 all OFF) NOTE: SW1 DIP switches (G, Y/Y2, W1, W2 thermostat terminals) and DEHUM (1/4" male quick connect terminal) are located on the

LowCooling(Y1)Request:

HighCooling(Y1 &Y/Y2) or (Y/Y2)Request:

FCB.

SW2 DIP switches and Y1 and O thermostat terminals are located on the TSlB.

24VAC signals applied to Y1 & G terminals of TSIB (Tap Select Interface Board) and FCB (Furnace Control Board), respectively.

• Low Cooling motor speed is energized after 5 second Coot Fan On Delay time. Y1 & G signals removed from TSlB and FCB

• Low Cooling motor speed is de-energized after 90 second Coot Fan Off Delay time. Cooling (Y1) and dehumidification (DEHUM) requests:

• 24 VAC signals applied to Y1, DEHUM & G terminals of TSlB and FCB.

• Same operation as the cooling (Y1) request, except the cooling airflow is reduced 20% to compensate for high humidity conditions during cooling operation. The low cooling airflow returns to the normal setting after the DEHUM signal is

removed.

24VAC signals applied to Y1 & Y/Y2 & G or Y/Y2 & G terminals of FCB (Furnace Control Board).

• High Cooling motor speed is energized after 5 second Cool Fan On Delay time.

Y1 &Y/Y2 & G or Y/Y2 & G signals removed from TSIB and FCB

• High Cooling motor speed is de-energized after 90 second Coot Fan Off Delay time.

High Cooling (Y1 & Y/Y2 or Y/Y2) and dehumidification (DEHUM) requests:

• 24 VAC signals applied to Y1 & Y/Y2 or Y/Y2, DEHUM, & G terminals of and FCB.

• Same operation as the high cooling (Y1 & Y/Y2 or Y/Y2) request, except the cooling airflow is reduced 20% to compensate for high humidity conditions during cooling operation. The high cooling airflow returns to the normal setting after the DEHUM signal is

removed.

Low or high cooling and O terminal (Heat Pump mode):

• If the J2 jumper is in the AC/HP EFFICIENCY position, there will be no change in blower airflow regardless of the O terminal being energized or de-energized.

• If the J2 jumper is in the HP COMFORT position, then there will be a 10% reduction in airflow when the O terminal is de-energized

(HP heating) and no airflow reduction when O is energized (HP cooling).

NOTE 1)The motor has been set up to recognize the O terminal as energized during cooling calls (reversing valve energized for cooling).

ContinuousCirculatingFan(G) Request:

24VAC signal applied to G terminal of FCB.

• Continuous fan speed is energized without delay.

G signal removed from FCB.

• Continuous fan speed is de-energized after 5 second delay.

NOTE 2) Heat or Cooling requests received during a Fan request, cause the fan speed to change to the appropriate heat or coot speed after the Fan On Delay time expires. The fan returns to continuous circulating speed after the selected Fan Off Delay time expires following toss of the Heating or Cooling request.

NOTE 3) Hard-wire option not available for variable speed models. NOTE 4) Continuous blower selection DIP 10 and 11 wilt cause the blower to run in high cooling speed for all low cooling (Y1) calls. Continuous blower DIP settings of 00 and 01 will allow low cooling (Y1) calls to operate normally.

Heating(Wl) Request(singlestagethermostatoperation,SWl DIPswitch#3 onthe FCBmust

be in OFFposition)(seefurnacewiring diagram):

24VAC signal applied to Wl terminal of FCB.

• Inducer motor turns on at high speed.

• Following a 15 second prepurge delay after the low pressure switch closes, the ignitor begins a 17 second warm up.

• The gas valve is energized, the main burners light at Low Heat rate.

• The ignitor is de-energized, and the inducer drops to low speed after the main burners ignite.

• The FCB will delay Low Heat blower operation for the 45-second Low Heat Fan On Delay time timed from the opening of the gas valve.

• If the Wl request is still present after 12 minutes, timed from the opening of the gas valve, the inducer switches to high speed, closing the high pressure switch, then the High Heat solenoid energizes, and the fan switches to High Heat speed.

37 Specifications are subject to change without notice 44101 202301

Wl signal removed from FCB.

• The gas valve de-energizes and the main burners go out.

• The inducer runs at its present speed for a 15 second postpurge period.

• The fan runs at its present speed.

• The blower de-energizes after the selected Heat Fan Off Delay time expires timed from the gas valve de-energizing.

NOTE 5) If a new Heating request arrives while the control is waiting for the Heat Fan Off Delay time to expire, the FCB will wait for the selected Heat Fan Off Delay, and then start a new heating cycle.

Heating(Wl & W2) Request(two-stagethermostatoperation,SWl DIPswitch#3 must be in ON

position)(see furnace wiringdiagram):

24VAC signals applied to W1 terminal of FCB.

• Same response as single stage thermostat operation described above except the burners, inducer, and blower will not go to high heat rate, and High Heat Fan speed unless a W2 signal is applied.

24VAC signal applied to W1 and W2 terminals of FCB.

• Same tight-off routine as described for the signal stage thermostat operation except burners light at High Heat rate, the inducer remains on high speed after ignition, and the FCB will delay High Heat blower operation for the 30-second High Heat Fan

On Delay.

NOTE 6) The FCB responds without delay to the presence or loss of W2 (with W1 constant). W1 & W2 result in high inducer, High Heat rate, and High Heat Fan speed. W1 only results in low speed inducer, Low Heat rate, and Low Heat Fan speed.

Heating Request with Gas Shut Off:

24 VAC signals applied to W1 terminal of FCB.

The FCB will attempt 4 cycles for ignition then go to soft lockout for 3 hours, and then try for ignition again as long as the heat call

remains. Power reset wilt clear lockout.

• Inducer motor turns on at high speed.

• Following a 15 second prepurge delay after the tow pressure switch closes, the ignitor begins warm up.

• The ignitor glows red-hot for 22 seconds, then turns off. The FCB flashes error code 6.

• The ignitor stays off for 17 seconds, then begins to warm up again.

• The ignitor glows red hot for 22 seconds then turns off. The FCB continues flashing error code 6.

• The ignitor stays off for 17 seconds, then begins to warm up again.

• The ignitor glows red hot for 22 seconds then turns off. The FCB continues flashing error code 6.

• The ignitor stays off for 17 seconds, then begins to warm up again.

• The ignitor glows red hot for 22 seconds then turns off. The FCB proceeds to soft lockout. Stops flashing error code 6, and begins flashing error code 6 + 1.

• The inducer motor de-energizes 15 seconds after error code 6 + 1 starts flashing.

FurnaceControl Board DiagnosticCodes (SeeFigure37):

OFF = 24VAC or 115VAC is off, fuse is open Heartbeat = Normal operation or no previous Diagnostic Code ON SOLID = Soft Lockout - Furnace Control Error (1 hr delay)

If code repeats immediately following power reset then replace control

1 Flash = Not used

2 Flashes = Pressure switch(es) closed when should be open 3 Flashes = Low pressure switch open when should be closed

4 Flashes = Limit or flame roll-out switch open (less than 2 minutes) 5 Flashes = Flame sensed out of sequence

6 Flashes = Failure to ignite or flame sense lost while running 6 + 1 Flashes = Soft Lockout - Max of four trials for ignition reached (3 hr delay) 7 Flashes = Soft Lockout - Limit or flame roll-out switch open longer than 2 minutes (1 hr delay)

(roll-out switch requires manual reset)

8 Flashes = Permanent Lockout - Gas valve relay contact stuck closed or miswired gas valve (power reset only) 9 Flashes = High pressure switch open when should be closed

10 Flashes = Improper transformer phasing on twinned applications or improper line voltage polarity.

* If status code recall is needed, briefly (2-3 seconds) remove then reconnect one limit switch wire (main or rollout) to display last stored status code. Do not remove power or blower door before initiating status code recall or code will be lost. Code is automatically cleared after 72 hours or upon power reset. * Proper flame sense microamps: 0.7 microamps D.C. minimum, 2.0 - 4.0 microamps nominal

NOTE 7) Continuous blower selection DIP 10 and 11 wilt cause the blower to run in high cooling speed for all low cooling (Y1) calls. Continuous blower DIP settings of 00 and 01 will allow low cooling (Y1) calls to operate normally.

HUMIDIFIER - The 24VAC HUM is energized when the low pressure switch closes on a call for heat. The 115V HUM (called HUM on Control) is energized when the inducer is energized.

ELECTRONIC AIR CLEANER - EAC is energized when there is a blower speed call. Itis NOT energized when blower operates in

the hard-wired continuous fan mode.

44101 202301 Specifications are subject to change without notice 38

17. WiringDiagram*8MPV(VariableSpeedBlowerMotor)

39 Specifications are subject to change without notice 44101 202301

18. Thermostat Wiring Guide

1. These diagrams are for reference. See thermostat 8. wiring instructions for specific terminal assignments, connections or operation.

2. Humidifier/humidistat is optional and not included 9. with the furnace.

3. Dehumidify feature (MPV models only) requires ther- mostat with DEHUM feature or a separate dehumidis- 10.

tat to get the dehumidification operation. Dehumidis- tat is optional and not included with the furnace.

4. Underlined terminal indicates intended use for multi- ple function terminals. 11.

5. TSIB terminals only available on MPV models.

6. Two-stage Air Conditioning ortwo-stage Heat Pump capability only available with MPV models.

7. W2 furnace operation is from furnace control algo- rithm SWl DIP switch #3 (TT) set to OFF. Furnace 12. runs in Low Heat for 12 minutes then switches to High Heat if heating call still exists.

HUM and DEHUM Terminal available from Thermostat. Humidifier Wiring (*MPT/MPV) Models and Dehumidify Wiring (*MPV Models only)

TSIB NOTE 5

24V HUM terminal on furnace control is used to power

a humidifier (on call for heat and pressure switch closed) if no HUM thermostat option is available.

DEHUM provides a 20% reduction inairflow (when Y1 orY1 + Y2 is energized) when the furnace control DE- HUM terminal is energized with 24V.

If no DEHUM thermostat option is available, a dehu-

midistat that has closed contacts on a call for dehu- midify may be used

O provides a 10% reduction inairflow when Y1 or Y1 + Y2 is energized and O is NOT energized. (J2 jumper on TSIB must be in HP COMFORT position to get this function. AC/HP EFFICIENCY position results in no

reduction of airflow for Y1 orY1 +Y2 calls regardless of O being energized or not.)

For Heat Pump/Furnace s/stems, refer to Fossil Fuel Kit or Dual Fuel Thermostat Installation Instructions

for wiring.

SINGLE-STAGE

THERMOSTAT

NO CONNECTION [_

NO CONNECTION

TWO-STAGEorVS

NOTE 3, 9, 10

I i i i I i i

._ DEHUM

FURNACE

CONTROL

I I

24VHUM

SINGLE-STAGE

AIR CONDITIONER

OPTIONAL

HUMIDIFIER

NOTE 2

44101 2023 01 Specifications are subject to change without notice 40

No HUM and/or DEHUM Terminal available from thermostat. Humidifier Wiring (*MPT/MPV models) Dehumidify wiring (*MPV models only)

TSI B NOTE5

NO CONNECTION _]

NO CONNECTION

TWO-STAGE or VS

FURNACE

SINGLE-STAGE

OPTIONAL

DEHUMIDISTAT _] _]

(*MPV Models Only)

THERMOSTAT

CONTROL

SINGLE-STAGE

AIR CONDITIONER

............--_ .............4_ql_q

Connect 1 to Y/Y2 for , NOTE 3 n DEHUM

1-stage AC/HP L._.

applications

l_q l_q..

....... .[] 24V HUM -.

' OPTIONAL t

' HUMIDISTAT

' __

-U

NOTE 2

OPTIONAL

HUMIDIFIER 1,

_ ,

....... 1

_ '

NOTE2

i i

i t

Single-Stage Thermostat with Two-Stage or Variable Speed Furnace (*MPT/MPV Models) and Single-Stage Air Conditioner

TSIB NOTE 5

NO CONNECTION

(HP may use O)

TWO-STAGE or VS

FURNACE CONTROL

r_q

SINGLE-STAGE

AIR CONDITIONER

OPTIONAL

DEHUMIDISTAT I_

(*MPV Models Only)

SINGLE-STAGE

THERMOSTAT

r_q

g .

Connect 1 to Y/Y2 for , NOTE 3

1-stage AC/HP

applications

41 Specifications are subject to change withoutnotice 44101 202301

L_.

i ......

i i

i i i

i i

• -t] DEHUM

.._ 24V HUM .

OPTIONAL

HUMIDISTAT

NOTE 2

OPTIONAL

HUMIDIFIER '

_ ,

....... i

_ '

NOTE 2

i i

Two-Stage Thermostat with Two-Stage Furnace or Variable Speed Furnace (*MPT/MPV Models) and Single-Stage Air Conditioner

TWO-STAGE

THERMOSTAT TSIB NOTES

]ii

SINGLE STAGE

AIR CONDITIONER

VS FURNACE

OPTIONAL

DEHUMIDISTAT ,

(*MPV Models Only) _

If no DEHUM from _

thermostat available ',

CONTROL

i i

Connect 1 to Y1 for2- ,

stage AC-HP

applications. ,

OR '

Connect 1 to Y/Y2 for ,

1-stage AC- HP _

applications

NOTE 3, 9, 10

i i I"

i ,I

,,_ DEHUM

OPTIONAL

HUMIDIFIER

NOTE 2

....... 1

i i

i i i i

i i

Two-Stage Thermostat with Variable Speed Furnace (*MPV Models only) and Two-Stage Air Conditioner

TWO-STAGE

THERMOSTAT TSIB notes

It- - - -

OPTIONAL

DEHUMIDISTAT

(*MPV Models Only)

If no DEHUM from

thermostat available '_

I I

I I I I

I I I

VS FURNACE

CONTROL

TWO-STAGE

AIR CONDITIONER

!L "

I I

Connect 1 to Y1 for 2-

stage AC-HP

applications.

Connect 1 to Y/Y2 for

1-stage AC- HP

applications

I I

I I I

I I

L .......

,,_ DEHUM

[_-.

24V HUM

OPTIONAL

HUMIDIFIER '

....... i

NOTE 2

44101 2023 01 Specifications are subject to change withoutnotice 42

ICP C8MPT050B12A1, C8MPT075F14A1, C8MPT075F14B1, C8MPT100F14A1, C8MPT100F14B1 Installation Guide

Specifications and Main Features

Frequently Asked Questions

User Manual