Fedders Fv95A072 Users Manual

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2015-02-03

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Installation, Operation and Maintenance

HIGH EFFICIENCY

TWO STAGE VARIABLE SPEED

Please read the operating instructions and safety

precautions carefully and thoroughly before installing

and operating your furnace. Keep this manual in a

safe place for future reference.

USER’S INSTRUCTION GUIDE

INSTALLATION, OPERATION AND

MAINTENANCE MANUAL

Model

Serial Number

Date of Purchase

For future reference write down the model, serial

number, and date of purchase. Use these numbers in

any correspondence or service calls concerning your

furnace.

Keep these instructions for future reference.

CATEGORY I NATURAL GAS AND LP GAS

WARM AIR FURNACE

LOCATED AFTER PAGE 43 OF THIS

23-23-0508N-003

MODEL 77

FV95A054 FV95A072 <

FV95A090< FV95A108

Case 1: Furnace Located In An

Case 2: Furnace Located In A

Case 3: Furnace Located In A Confined Space,

Case 4: Furnace Located In A Confined Space,

Sequence of Operation if the Furnace

Circulating Air Blower and

FIELD SUPPLIED AND INSTALLED

Table of Contents

AIR CONDITIONING

INSPECTION/ACCESS PANEL

Vertical Termination of Combustion Air and

Horizontal Termination of Combustion Air and

Termination of Combustion Air and Ventilation

L.P

INTRODUCTION ....................................................................... 1

AFETY ..................................................................................... 1

afety Rules ................................................................... 1

ODES....................................................................................... 3

FURNACE SIZING ..................................................................... 4

................................................................. 4

................................................... 4

LOCATION OF UNIT ................................................................. 5

General ......................................................................... 5

Other Considerations:................................................... 5

CLEARANCES ........................................................................... 6

UNIT DIMENSIONS ................................................................... 6

DUCTWORK ............................................................................. 7

Guide: ........................................................................... 7

Ductwork Steps: ........................................................... 7

INSTALLATION POSITIONS ....................................................... 8

Inducer Blower Rotation ............................................. 9

Inducer Rotation Steps ............................................... 9

Non-Suspended Installation ......................................... 9

Suspended Installation ................................................. 9

Upflow Installation ...................................................... 10

Downflow Installation ................................................ 11

Horizontal Installation ................................................ 12

AIR FOR COMBUSTION .......................................................... 13

Unconfined Space .......................................... 13

Confined Space .............................................. 13

Outdoor Air From Attic Or Crawl Space ...... 13

Outdoor Air Ducted Horizontally.................. 13

FURNACE VENTING ................................................................ 14

Direct Venting Pipe Connection.................................. 14

Combustion Air Inlet Piping........................................ 14

Air Filters....................................................................... 15

Exhaust Vent Piping...................................................... 15

Guidelines...................................................................... 16

Joining Pipe And Fittings.............................................. 16

Calculating Piping Length............................................ 18

Pipe Using A Concentric Venting Kit.......................... 19

Exhaust Vent................................................................. 20

Exhaust Vent................................................................. 21

Non Direct Vent Furnace Installations......................... 22

Direct Vent Piping Termination................................... 17

CONDENSATE DRAINS............................................................. 25

Drain Hose Installation.................................................. 25

Condensate Drain Installation....................................... 27

GAS SUPPLY ............................................................................. 28

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

Leak Testing ................................................................. 28

High Altitude ................................................................ 29

CONVERSIONS ......................................................................... 29

Natural to L.P. Gas ....................................................... 29

.to Natural Gas ........................................................ 29

Conversion Steps .......................................................... 29

HIGH ALTITUDE & AIRFLOW SPECIFICATION TABLES ........... 30

ELECTRICAL SPECIFICATIONS................................................... 32

Furnace Connection ..................................................... 32

Low Voltage Wiring ..................................................... 32

Thermostat ................................................................... 33

Thermostat Location..................................................... 33

Thermostat Heat Anticipator Setting ......................... 33

START UP PROCEDURES ......................................................... 34

To Start The Furnace: ................................................... 34

To Shut Down The Furnace: ......................................... 34

Sequence of Operation ............................................... 34

Does Not Light or Detect Flame ................................. 34

Setting The Manifold Gas Pressure ............................. 34

Checking Furnace Input ............................................... 34

Temperature Rise Check ............................................... 35

AIR FLOW ................................................................................. 35

Calculating Airflow....................................................... 35

Adjusting Dip Switches................................................. 36

ADJUSTING BLOWER SPEEDS ................................................. 37

Cooling Mode ............................................................... 37

Heating Mode ............................................................... 37

How ToRemove The Blower ....................................... 37

How To Install The Blower ........................................... 37

MAINTENANCE ....................................................................... 38

Air Filter......................................................................... 38

Lubrication ................................................................... 38

Vent Connector............................................................. 38

Operating Tips ............................................................. 38

ANNUAL INSPECTION/SERVICE ............................................... 38

Heat Exchanger............................................................. 38

Burners ......................................................................... 38

Induced Blower ............................................................. 38

Circulating Fan ............................................................. 38

Electrical ....................................................................... 39

Furnace Operation ....................................................... 39

OPTIONAL ACCESSORIES......................................................... 39

Electronic Air Cleaner................................................... 39

Humidifier/ Electronic Air Cleaners ............................. 39

TROUBLESHOOTING ............................................................... 39

WIRING DIAGRAM .................................................................. 43

INTRODUCTION

This 95% efficient gas fired furnace series is CGA / AGA

vent pressure) non-direct or direct vent central forced air fur-

nace. It is an upflow, downflow, horizontal left and right fur-

nace suitable for residential and light commercial heating

applications from 54,000 to 108,000 BTU/Hr. When installed

as a direct vent furnace, all combustion air is supplied direct-

ly to the furnace burners through a special air intake system.

(See Section “Ventilation and Combustion Air.”)

All models may be fired by natural gas or field convertible to

LP gas (propane). The furnace is shipped completely assem-

bled except for the drain trap assembly and the venting.

Please inspect for damage when the furnace is unpacked.

SAFETY

Throughout the manual, symbols and words are used to draw

attention to potentially hazardous conditions.

Safety Rules:

1. Use this furnace only with type of gas approved for this

furnace. Refer to the furnace rating plate.

2. Install this furnace only in dry indoor locations

(protected from weather).

3. Provide adequate combustion and ventilation air to the

furnace space as specified in the Determining

4. Combustion products must be discharged outdoors.

Connect this furnace to an approved vent system only, as

these instructions.

5. 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 as

instructions.

6. Always install furnace to operate within the furnace’s

intended temperature rise range with a duct system

which has an external static pressure within the

allowable range, as specified in the Furnace Sizing

7. When a furnace is installed so that the supply ducts carry

air circulated by the furnace to areas outside the space

containing the furnace, the return air shall also be

handled by duct(s) sealed to the furnace casing and

terminating outside the space containing the furnace.

(Furnace for heating the home located in the attached

garage, for example).

8. A gas fired furnace for installation in a residential

garage must be installed so that the burners and ignitor

are no less than 18 inches above the floor. The furnace

must be located, or protected to avoid physical damage

by vehicles.

9. THIS FURNACE IS NOT TO BE USED FOR TEMPORARY

HEATING FOR BUILDINGS UNDER CONSTRUCTION.

DANGER

THIS INDICATES AN IMMINENTLY HAZARDOUS

SITUATION WHICH, IF NOT AVOIDED, WILL RESULT IN

DEATH OR SERIOUS INJURY.

WARNING

THIS INDICATES A POTENTIALLY HAZARDOUS

SITUATION WHICH, IF NOT AVOIDED, COULD RESULT IN

DEATH OR SERIOUS INJURY.

CAUTION

THIS INDICATES A POTENTIALLY HAZARDOUS

SITUATION, WHICH, IF NOT AVOIDED, MAYRESULT IN

MINOR OR MODERATE INJURY.

CAUTION

MAKE SURE TO REMOVE FOAM BLOWER HOUSING

SHIPPING SUPPORTS BEFORE OPERATING FURNACE.

SHIPPING SUPPORTS ARE LOCATED ON THE BOTTOM

RIGHT AND BOTTOM LEFT SIDES OF BLOWER HOUSING.

DANGER

FIRE OR EXPLOSION HAZARD

IF THE INFORMATION IN THESE INSTRUCTIONS IS NOT

FOLLOWED EXACTLY, A FIRE OR EXPLOSION MAY

RESULT, CAUSING PROPERTY DAMAGE, PERSONAL

INJURY OR LOSS OF LIFE.

DANGER

DO NOT INSTALL THIS FURNACE IN A MOBILE HOME!

THIS FURNACE IS NOT APPROVED FOR INSTALLATION IN

AMOBILE HOME. DOING SO COULD CAUSE FIRE,

PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF

LIFE.

WARNING

THE FURNACE CONTAINS FOIL COVERED FIBERGLASS

INSULATION. INHALATION OF FIBERGLASS PARTICLES IS

ASSOCIATED WITH RESPIRATORY DISEASE INCLUDING

CANCER.

WARNING

THE FUEL SUPPLIER NORMALLYODORIZES NATURAL

GAS AND PROPANE. IN SOME CASES, THE ODORANT

MAY NOT BE PERCEIVABLE. INSTALLATION OF UL AND

CUL RECOGNIZED FUEL GAS DETECTORS INSTALLED IN

ACCORDANCE WITH THEIR MANUFACTURER’S

INSTRUCTIONS IS RECOMMENDED AS AN ADDITIONAL

MARGIN OF SAFETY.

esign certified as a Category I (condensing with positive

Combustion Air section on page 13 of these instructions.

specified in the Furnace Venting section on page 14 of

section on page 4, the Ductwork section on page 7, and

specified in the Gas Supply section on page 28 of these

he Airflow section on page 35 of these instructions.

DANGER

WHAT TO DO IF YOU SMELL GAS:

•DO NOT TRY TO LIGHT ANY APPLIANCE

•DO NOT TOUCH ANY ELECTRICAL SWITCH; DO NOT

USE ANY PHONE IN YOUR BUILDING

•IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A

NEIGHBOR’S PHONE, OR A CELLULAR PHONE FROM A

LOCATION WELL AWAY FROM THE BUILDING.

FOLLOW THE GAS SUPPLIER’S INSTRUCTIONS.

•IF YOU CANNOT REACH YOUR GAS SUPPLIER, CALL

THE FIRE DEPARTMENT

•DO NOT ENTER THE BUILDING UNTIL AUTHORIZED TO

DO SO BY THE GAS SUPPLIER OR THE FIRE

DEPARTMENT

IMPROPER INSTALLATION, OPERATION, ADJUSTMENT,

ALTERATION, SERVICE OR MAINTENANCE CAN CAUSE

INJURY, PROPERTY DAMAGE OR LOSS OF LIFE. REFER TO

THIS MANUAL FOR PROPER INSTALLATION, OPERATION,

SERVICE, AND MAINTENANCE INSTRUCTIONS.

AQUALIFIED INSTALLER, SERVICE AGENCY OR

THE GAS SUPPLIER MUST PERFORM

INSTALLATION AND SERVICE.

DO NOT DESTROY THIS MANUAL

PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE

FOR FUTURE REFERENCE BY A SERVICE TECHNICIAN.

WARNING

THE EXHAUST GASES FROM THIS FURNACE CONTAIN

CHEMICALS, WHICH ON SOME OCCASIONS MAY

INCLUDE CARBON MONOXIDE (CO). CARBON

MONOXIDE IS AN ODORLESS, TASTELESS, CLEAR

COLORLESS GAS, WHICH IS HIGHLYTOXIC. EVEN LOW

CONCENTRATIONS ARE SUSPECTED OF CAUSING BIRTH

DEFECTS AND OTHER REPRODUCTIVE HARM.

UL AND CUL RECOGNIZED CO DETECTORS ARE

RECOMMENDED FOR ALL BUILDINGS EQUIPPED WITH

FOSSIL FUEL BURNING APPLIANCES. ALL CO DETECTORS

SHOULD BE INSTALLED IN ACCORDANCE WITH THEIR

MANUFACTURER’S INSTRUCTIONS AND APPLICABLE

LOCAL BUILDING CODES.

WARNING

THESE INSTRUCTIONS ARE INTENDED AS AN AID TO

QUALIFIED SERVICE PERSONNEL FOR PROPER

INSTALLATION, ADJUSTMENT AND OPERATION OF THIS

FURNACE. READ THESE INSTRUCTIONS THOROUGHLY

BEFORE ATTEMPTING INSTALLATION OR OPERATION.

FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT

IN IMPROPER INSTALLATION, ADJUSTMENT, SERVICE OR

MAINTENANCE, POSSIBLY RESULTING IN FIRE,

ELECTRICAL SHOCK, CARBON MONOXIDE POISONING,

EXPLOSION, PROPERTY DAMAGE, PERSONAL INJURY OR

DEATH.

DO NOT STORE OR USE GASOLINE OR OTHER

FLAMMABLE VAPORS AND LIQUIDS, OR OTHER

COMBUSTIBLE MATERIALS IN THE VICINITY OF THIS OR

ANY OTHER APPLIANCE.

DANGER

WHEN THIS FURNACE IS INSTALLED IN A RESIDENTIAL

GARAGE, IT MUST BE INSTALLED SO THE BURNERS AND

IGNITION SOURCE ARE LOCATED NO LESS THAN 18

INCHES ABOVE THE FLOOR TO PREVENT THE RISK OF

IGNITING FLAMMABLE VAPORS WHICH MAY BE

PRESENT IN THE GARAGE.

THE FURNACE MUST BE LOCATED OR PROTECTED TO

AVOID PHYSICAL DAMAGE BY VEHICLES.

FAILURE TO HEED THESE WARNINGS CAN CAUSE A FIRE

OR EXPLOSION, RESULTING IN PROPERTY DAMAGE,

PERSONAL INJURY OR LOSS OF LIFE.

CODES:

This furnace must be installed:

•In accordance with all local codes, bylaws and

regulations by those authorities having jurisdiction

• In the United States, this furnace must be installed in

accordance with the current ANSI Z223.1 (NFPA 54)

National Fuel Gas Code

• In Canada, this furnace must be installed in

accordance with the current CAN/CGA -B149

Installation Code for Fuel Burning Appliances

Electrical connections must be made

in accordance with:

• Any applicable local codes, bylaws and regulations

• Canada: current edition of CAN/CSA C22.1, Canadian

Electrical Code (Part 1)

• United States: current edition of ANSI/NFPA 70,

National Electrical Code

Codes and additional information may

be obtained from:

•American Gas Association

1515 Wilson Boulevard

Arlington, VA, 22209

703-841-8400

•National Fire Protection Association

1Batterymarch Park

Quincy, MA, 02269-9101

617-770-3000

•Canadian Gas Association

Suite 1, 243 Consumers Road

North York, ON, M2J 5E3

416-498-1994

INSTALLATION REQUIREMENTS SPECIFIC

TO THE STATE OF MASSACHUSETTS FOR

DIRECT VENT APPLIANCES.

FOR ALL SIDE WALL HORIZONTALLY VENTED GAS FUELED

EQUIPMENT INSTALLED IN EVERY DWELLING, BUILDING OR

STRUCTURE USED IN WHOLE OR IN PARTFOR RESIDENTIAL

PURPOSES, INCLUDING THOSE OWNED OR OPERATED BY

THE COMMONWEALTH AND WHERE THE SIDE WALL

EXHAUST VENT TERMINATION IS LESS THAN SEVEN (7)

FEET ABOVE FINISHED GRADE IN THE AREA OF THE VENT-

ING, INCLUDING BUT NOT LIMITED TO DECKS AND PORCH-

ES, THE FOLLOWING REQUIREMENTS SHALL BE SATISFIED:

1. INSTALLATION OF CARBON MONOXIDE DETECTORS:

At the time of installation of the side wall horizontal

vented gas fueled equipment, the installing plumber

or gas fitter shall observe that a hard wired carbon

monoxide detector with an alarm and battery back-up

is installed on the floor level where the gas equip-

ment is to be installed. In addition, the installing

plumber or gas fitter shall observe that a battery

operated or hard wired carbon monoxide detector

with an alarm is installed on each additional level of

the dwelling, building or structure served by the side

wall horizontal vented gas fueled equipment. It shall

be the responsibility of the property owner to secure

the services of qualified licensed professionals for the

installation of hard wired carbon monoxide detectors.

a. In the event that the side wall horizontally vented

gas fueled equipment is installed in a crawl space or

an attic, the hard wired carbon monoxide detector

with alarm and battery backup may be installed on

the next adjacent floor level.

b. In the event that the requirements of this subdivi-

sion can not be met at the time of completion of

installation, the owner shall have a period of thirty

(30) days to comply with the above requirements;

provided, however that during said thirty (30) day

period, a battery operated carbon monoxide detec-

tor with an alarm shall be installed.

2. APPROVED CARBON MONOXIDE DETECTORS:

Each carbon monoxide detector as required in accor-

dance with the above revisions shall comply with NFPA

720 and be ANS/UL 2034 listed and IAS certified.

3. SIGNAGE:

Ametal or plastic identification plate shall be perma-

nently mounted to the exterior of the building at a

minimum height of eight (8) feet above grade directly

in line with the exhaust vent terminal for the horizon-

tally vented gas fueled heating appliance or equip-

ment. The sign shall read, in print size no less than

one-half (1/2) inch in size, “GAS VENT DIRECTLY

BELOW.KEEP CLEAR OF ALL OBSTRUCTIONS”.

4. INSPECTION:

The state or local gas inspector of the side wall hori-

zontally vented gas fueled equipment shall not

approve the installation unless, upon inspection, the

inspector observes carbon monoxide detectors and sig-

nage installed in accordance with the provisions of 248

CMR 5.0(2)(a)1 through 4.

5. PRODUCT-APPROVED VENT/AIR-INTAKE:

Aproduct-approved vent terminal must be used and, if

applicable, a product-approved air intake must be

used. Installation shall be in strict compliance with the

manufacturer’s instructions.

6. INSTALLATION INSTRUCTIONS:

Acopy of all installation instructions for all product

approved side wall horizontally vented gas fueled

equipment, all venting instructions, all parts lists for

venting instructions, and/or all venting design instruc-

tions shall remain with the appliance or equipment at

the completion of the installation.

FURNACE SIZING

The maximum hourly heat loss for each heated space shall

be calculated in accordance with the procedures described

inManual J titled, "Load Calculation" published by the Air

Conditioning Contractors of America, or by any other

method which is suitable for local conditions, provided the

results obtained are in substantial agreement with, and not

less than those obtained using the procedure described in

their manual.

In Canada, the maximum hourly heat loss for each heated

space shall be calculated in accordance with the procedures

described in the manuals of the Heating, Refrigeration and

Air Conditioning Institute of Canada (HRAI), or by any other

method which is suitable for local conditions, provided the

results obtained are in substantial agreement with, and not

less than those obtained using the procedure described in

their manuals.

If the installation is a retrofit application, do not rely on the

capacity of the existing heating equipment as a method to

size the new furnace. Many of the heat transfer multiples

listed in earlier versions of load calculation manuals were

much higher than those listed in more recent editions. It is

possible that energy saving measures have been completed

since the installation of the existing furnace. This might

include additional insulation in the attic or walls, the

application of sprayed foam insulation, the addition of

storm windows and doors, weather stripping, caulking, etc.

Many of the older furnaces were equipped with large belt

drive blower systems, operating at low RPMs. If replacing an

existing furnace, be sure that the existing ductwork can

handle the amount of airflow necessary for a reasonable

temperature rise. Most older gas furnaces operated with a

system temperature rise of 70 - 100°F. This series furnace has

been designed for operation with a system temperature rise

(∆T) of 35 - 65°F.If the furnace selected has an identical

output capacity as the original furnace, a substantial

increase in system airflow will be required.

Existing ductwork should be assessed for its air handling

capabilities. For residential applications, the recommended

air velocity of a supply air trunk duct is 700 feet per minute

(fpm), and should not exceed 900 fpm. The recommended

air velocity of a supply air branch run is 600 fpm, and should

not exceed 900 fpm. These values are slightly lower for

flexible ducting. The recommended air velocity of a return

air trunk duct is 600 fpm, and should not exceed 700 fpm.

The recommended and maximum air velocity of a return air

branch is 600 fpm.

The equal friction chart, as published by ASHRAE and HRAI,

is the basis for the various air duct calculators available

through heating supply companies.

The return air system is equally as important as the

supply air system. An undersized return air system will

prevent sufficient quantities of air from reaching the

supply air system, properly sized or otherwise, and will

consequently reduce the service life of the furnace and

its components.

IMPORTANT

INSPECTION / ACCESS PANEL

If an air conditioning coil is not to be used in the supply air

plenum, it is recommended that the outlet duct be provided

with a removable access panel, which is accessible when

installed so the heat exchanger may be viewed for possible

openings using light assistance or a probe that can be

inserted for sampling the air stream. The access cover must

be fabricated in such a manner as to prevent leaks.

AIR CONDITIONING

This furnace may be used as part of an air conditioning

system. The furnace wiring and control system are “air

conditioning ready”. There are the following factors to

consider:

• The air conditioning evaporator coil must be

downstream of the heat exchanger.The cooled air

passing over the warm ambient air inside the heat

exchanger tubes can cause condensation inside the

tubes, resulting in corrosion and premature failure.

• A parallel duct system can be installed to direct the air

from the furnace through the evaporator coil only.Use

dampers or other means to bypass the heat exchanger.

If [summer/winter] dampers are used, they should be

interlocked to prevent system operation unless the

dampers are in the full open or full closed position.

Other Considerations:

1. This furnace is not to be used for temporary heating of

buildings or structures under construction.

2. If this furnace is to be used with air conditioning and is

tobe installed in an area over a finished ceiling or

living area, install a field fabricated auxiliary drain pan

under the furnace to protect that area from accidental

condensate spills. The auxiliary pan should be large

enough to collect accidentally spilled condensate from

the air conditioning evaporator coil assembly if

applicable. Follow local codes.

3. These furnaces are approved for installation in attics,

alcoves, utility rooms, closets and crawlspaces. If this

furnace is to be installed in a utility room, be sure that

it is located in such a way as to allow access for

servicing or the removal of any other appliance, (hot

water heater, for example).

4. If the furnace is to be installed in a residential garage,

the burners must be a minimum of 18 inches (460 mm)

above the floor.

5. If the furnace is to be installed in a commercial (repair)

garage, the burners must be a minimum of 4.5 feet

(1375 mm) above the floor.

6. The furnace must be protected from physical damage

by metal barriers or other acceptable means.

7. If the furnace is to be located in an area where the

combustion air is laden with chemical compounds such

as bromine, chlorine or fluorine, as may be found in

swimming pool chemicals, laundry detergents, etc., use

outdoor air for combustion. These compounds when

exposed to flame, form acids, which attack the heat

exchanger and other components.

Apartial list of these contaminants includes:

•Aerosols, particularly CFC based aerosols

•Air fresheners

•“Airplane” glue and similar cements

•Ammonia, as is commonly found in permanent wave

solutions used in women’shair dressing salons

•Anti-static fabric softeners used in clothes dryers

•Carbon tetrachloride

•Chlorinated cleaners and waxes

•Chlorine and bromine based swimming pool

chemicals and treatments

•De-icing salts or chemicals, rock salt, etc.

•Dry cleaning solutions such as perchloroethylene

•Halogen based refrigerants including R-12 and R-22

•Hydrochloric acid, muriatic acid, or other acid based

masonry washing compounds

•Polyurethane and similar derivatives fumes

•Printer’s inks, paint removers, furniture strippers,

varnishes, varsol, toluene, etc.

•Water softener salts and chemicals

LOCATION of UNIT

General

1. The furnace is not weatherized. Select a dry indoor

location.

2. Select a location where the exhaust and combustion air

piping can be routed between the furnace and their

terminations with a minimum of lengths and fittings.

Be sure to check that the proposed termination location

will meet code requirements with respect to location

and minimum clearances. (See venting section for

minimum and maximum limits.)

3. Select a location as near as possible to the existing or

proposed duct system.

4. The furnace location must permit access for servicing,

and be within the clearance to combustibles guidelines

as marked on the appliance rating plate.

5. The furnace should be installed on a firm base when

installed in the upflow position. This is typically a

concrete floor if installing the furnace in a basement.

6. If the furnace is being installed so that the return air

will enter through the bottom, the perimeter of the

furnace must be properly supported.

7. When installed in the horizontal position, the furnace

may be supported from the bottom, or suspended.

8. When installed in the down flow position on a

combustible floor,subbase kit #30476 is required

(contact manufacturer for availability).

9. The furnace location must have provisions for

condensate drainage. If a suitable drain is unavailable

near the furnace, a condensate pump must be used. The

condensate pump drain tubing must not terminate

outdoors; similar to some air conditioning condensate

installations. Be sure to select a condensate pump that

has been approved for furnace condensate

applications.

10. The furnace must be installed level, or tilted slightly

down in the front, to allow for the proper drainage of

condensate. The furnace may shut down during

operation if the condensate does not drain freely away

from the furnace.

11. If the furnace is installed in an area where freezing may

occur, a garage, an attic, a crawl space or any

unconditioned space, steps must be taken to protect

the condensate trap and drain line from freezing. One

possible measure could be to use a self-regulating 5 or

6watt per foot heat tape covered with a jacket of

insulation. Heat tapes are available in plumbing supply

houses.

DIMENSIONS (Inches)

MODEL

INPUT

WIDTH DEPTH HEIGHT SUPPLY

ABCFx G

RETURN

SIDE BOTTOM

D x E J x K L H

Vent outlet 4” -Use reducer fittings.

Two return air openings required

54,000

72,000

90,000

108,000

54,000

72,000

90,000

108,000

17.5

20.5

24.5

14 x 22 16 x 19 3/4 2

14 x 22 19 x 19 3/4

14 x 22 23 x 19 3/4

VENT

16.5 x 19

19.5 x 19

24 x 19

FIGURE 2: DIMENSIONS

TABLE 3: DIMENSIONS

CLEARANCES

Table 2 provides the certified clearances to combustibles.

DANGER

THE AREA AROUND THE FURNACE MUST BE KEPT CLEAR

AND FREE OF ALL COMBUSTIBLE MATERIALS INCLUDING

GASOLINE AND OTHER FLAMMABLE VAPORS AND

LIQUIDS.

THE HOMEOWNER SHOULD BE CAUTIONED THATTHE

FURNACE AREA MUST NOT BE USED AS A BROOM

CLOSET OR FOR ANY OTHER STORAGE PURPOSE.

UPFLOW FURNACES ARE DESIGN CERTIFIED FOR

INSTALLATION ON COMBUSTIBLE FLOORS. THIS SHALL

BE INTERPRETED AS A WOOD FLOOR ONLY.

THE FURNACE MUST NOT BE INSTALLED DIRECTLY ON

CARPETING, VINYL TILE, OR OTHER COMBUSTIBLE

MATERIAL EXCEPT WOOD. INSTALLATION ON

COMBUSTIBLE MATERIAL CAN RESULT IN FIRE, CAUSING

PROPERTY DAMAGE, PERSONAL INJURYOR DEATH.

DANGER

COMBUSTIBLE MATERIAL MUST NOT BE PLACED ON OR

AGAINST THE FURNACE JACKET.

PLACEMENT OF COMBUSTIBLE MATERIALS ON, AGAINST

OR AROUND THE FURNACE JACKET CAN CAUSE AN

EXPLOSION OR FIRE RESULTING IN PROPERTY DAMAGE,

PERSONAL INJURY OR LOSS OF LIFE.

0" 0" 0"

LOOKING AT UNIT AS INSTALLED

TABLE 2: CLEARANCES TO COMBUSTIBLES

See the appliance rating plate affixed to the

furnace for specific model number, serial

number and clearance to combustibles

information.

This furnace requires a minimum of 24-inches of front

clearance for service purposes. For this purpose, service

clearance takes precedence over clearance to

combustibles.

IMPORTANT

0.5" 0.5" 0.5"

0" * 0" * 0" *

0" 0"

1" **

0" *** 0" **** 0"

UPFLOW COUNTERFLOW HORIZONTAL

TOP

PLENUM

TOP/BOTTOM

PLENUM SIDES

UNIT FRONT

UNIT BACK

UNIT SIDES

UNIT BASE

UNIT FLUE PIPE

ENCLOSURE

1" 1" 2.5"

1" 2"

0" 0" 0"

CLOSET CLOSET CLOSET

ALL DIMENSIONS IN INCHES

* 24" REQUIRED FOR SERVICE

** SUPPLY AIR END / RETURN AIR END

*** CERTIFIED FOR CLOSET INSTALLATION ON COMBUSTIBLE FLOORING

**** CERTIFIED FOR INSTALLATION ON COMBUSTIBLE FLOORING ONLY WHEN INSTALLED

ON SPECIAL BASE PART #30476

DUCTWORK

Proper airflow is required for the correct operation of this

furnace. Insufficient airflow may cause erratic operation,

could cause the furnace to cycle on the high temperature

limit, and may damage the heat exchanger. Excessive

airflow may result in an excessively noisy duct system and

may result in undesirable consequences such as creating

uncomfortable drafts and causing drapes or curtains to

blow around.

If air conditioning is to be used with the furnace, the duct

system must be capable of delivering the correct amount of

airflow for each system.

The ductwork should be sized and constructed in

accordance with accepted industry standards. Duct sizing

and construction information may be obtained from:

• A.C.C.A. (Air Conditioning Contractors of America)

• A.S.H.R.A.E. (American Society of Heating,

Refrigeration and Air Conditioning Engineers)

• H.R.A.I. (Heating, Refrigerating and Air Conditioning

Institute (Canada)

• S.M.A.C.N.A. (Sheet Metal and Air Conditioning

Contractors’ National Association (United States)

All of the above professional organizations have duct sizing

manuals available.

The total static pressure drop of the air distribution system

should not exceed 0.5 inches water column.

Ductwork Steps:

1. Position the furnace to minimize ductwork length and

fittings.

2. Cut open a return air inlet. The choices are:

a) either side

b) furnace bottom

c) any combination, i.e. two sides or a side and the

bottom.

In all cases, cut the inlet air opening the full width of

CAUTION

DO NOT USE THE REAR PANEL AS A RETURN AIR INLET.

THERE IS INSUFFICIENT AREA TO PERMIT ADEQUATE

AIRFLOW.

3. Install the filter rack(s) (field supplied).

4. Connect the return air duct or fitting to the furnace. The

connection should be as air tight as possible to prevent

entraining combustion gases from an adjacent fuel

burning appliance, or entraining combustion air for this

furnace .

5. Ensure that there is adequate space and accessibility for

the air filter.

6. If an air conditioning evaporator coil is required,

position it on the top of the furnace. Ensure that no air

can bypass the evaporator coil.

7. Connect the supply air plenum to the supply air outlet.

Flexible duct connectors are an effective device to

prevent the telegraphing of mechanical noise from the

furnace to other parts of the home via the ductwork. If

using flexible connectors, ensure that the adjoining

duct is independently supported.

Adequate provisions for combustion and ventilation air

must be in accordance with ANSI Z223.1 (NFPA54), section

5.3 "Air for Combustion and Ventilation" in the United

States, and CAN/CGA B149 in Canada. Check with local

authorities for any additional building codes, bylaws or

regulations.

WARNING

DO NOT, UNDER ANY CIRCUMSTANCES, CONNECT

RETURN OR SUPPLY AIR DUCTWORK TO OR FROM ANY

OTHER HEAT-PRODUCING DEVICE SUCH AS A FIREPLACE

INSERT, STOVE, ETC. DOING SO MAY RESULT IN FIRE,

CARBON MONOXIDE POISONING, EXPLOSION,

PERSONAL INJURY, LOSS OF LIFE, OR PROPERTY

DAMAGE.

Some high efficiency filters have a greater than nor-

mal resistance to airflow. This can adversely affect fur-

nace operation. Pressure check the static differential

from before the filter to the supply.

IMPORTANT

When two return air inlets are used, both must be

equipped with filters.

NOTE

When calculating an air filter size use the free air not

the advertised size.

NOTE

UNITS FOR 4 AND 5 TON CF AIR CONDITIONING MUST

HAVE DUAL RETURN AIR INLETS FOR OPTIMAL

AIRFLOW AND AIR FILTRATION. IF NOT SPECIFICALLY

STATED BY THE FILTER MANUFACTURER, FOR

EFFECTIVE AIR FILTRATION, ASSUME A MAXIMUM

VELOCITY OF 300 FPM FOR DISPOSABLE TYPE FILTERS,

OR 600 FPM FOR PERMANENT TYPE FILTERS.

NOTE

Guide:

Filter free area (in2) = 144 x (CFM / desired velocity (fpm))

WARNING

THERE MUST NOT BE ANY OPENINGS BETWEEN THE

BLOWER DIVISION PANEL AND THE COMBUSTION

COMPARTMENT. THE BLOWER COMPARTMENT IS UNDER

GREATER SUCTION THEN THE COMBUSTION

COMPARTMENT AND CAN PULL COMBUSTION AIR FROM

THE BURNERS AND CAUSE INCOMPLETE COMBUSTION

AND ERRATIC FURNACE OPERATION.

WARNING

THE VENT MUST BE CLAMPED TO THE FURNACE PANEL

USING THE GASKET AND CLAMP PROVIDED.

THE INTAKE MUST USE THE THREADED PVC

CONNECTOR WITH THE GASKET AND LOCK NUT.

Keep pressure switch hose above heat exchanger drain

and exhaust port.

IMPORTANT

If the pipe and fittings are to be other than PVC, use

the proper cleaner, primer and cement for the

dissimilar materials.

IMPORTANT

If the pipe is increased in size with a reducer it must

be on a vertical section of the pipe to facilitate drain-

ing the vent. Reducing the size of pipe to exit the

IMPORTANT

Always secure or support the exhaust vent and

combustion air inlet piping to the floor joists or rafters

to avoid sagging and possible fatigue of venting

materials. This ensures proper drainage and

preventing spilling of the products of combustion into

the building.

IMPORTANT

Clean and de-burr all pipe cuts. The shavings must not

be allowed to block the exhaust, combustion air inlet

orcondensate drain lines.

IMPORTANT

INSTALLATION POSITIONS

The furnace can be installed in any of four positions:

•Upflow

•Downflow

•Horizontal left

•Horizontal right

Maintain clearances to combustibles as outlined in Table 2.

Support the furnace cabinet to prevent twisting or

sagging.

General Considerations

When choosing an installation position the installer must

consider the following connections:

•Combustion air intake

•Exhaust vent

•Gas pipe

•Electrical wiring

•Condensate drain trap

Also consider the air conditioning connections, a/c drain,

access to filter(s) and access to furnace and a/c for repair.

The blower compartment should be completely isolated

from the burner compartment. In tight rooms with other

combustion devices, the blower compartment must be

completely isolated from the room. The combustion

compartment must also be completely isolated from the

room (unless non-direct vent). Sometimes the knockout

tool will punch too deep and open holes. Use caulking on

the inside of the cabinet to seal any holes. Insure that the

combustion door gasket is in good condition.

Drains and traps of furnaces installed in spaces

subjected to freezing temperature must also be

protected against freezing.

IMPORTANT

Exhaust Vent Connection

The exhaust vent must be clamped to the exterior panel(s)

with the clamp provided. Place the gasket between the

clamp and the side panel. Tighten clamp and fasten in

place using the three screws provided.

The clamp should secure the vent pipe to prevent internal

damage if the vent pipe is tampered with.

Combustion Air Inlet Connection

The combustion air inlet fitting is a 2” PVC Socket to Pipe

Thread adapter. Chose the intake location and open the

appropriate knock out. Install the adapter to the exterior

panel using the gasket on the outside of the panel and the

locknut on the inside of the panel.

reducer can be on the horizontal.

house (as shown on page 19, Figures 4 and 6), the

Instructions for Re-orienting Air Inducer

This furnace comes assembled ready for left side or vertical

venting. Rotate the inducer 180 degrees to exit the right

hand side.

1. Disconnect inducer wire connections.

2. Remove pressure switch hoses.

3. Remove pressure switches.

4. Remove 4 inducer screws

5. Remove inducer.

6. Reverse the bands on the rubber drain coupling so the

screws are accessible if necessary. (Do not reverse the

drain coupling.) Confirm that directional arrows on

drain coupling point away from inducer.

7. Remove the appropriate knock out.

8. Reinstall the inducer in the correct orientation with 4

screws removed in step 1.

9. Reinstall the pressure switches so that the switches and

hose is above the heat exchanger drain.

10. Complete the external venting as installation requires.

11. Rotate the drain coupling so the drain holes are angled

downward and tighten coupling bands.

12. Tighten the vent clamp and secure in place using the

screws provided.

FIGURE A : RIGHT INDUCER POSITION

FIGURE B : LEFT INDUCER POSITION

SUGGESTED METHOD FOR

SUSPENDING HORIZONTAL FURNACE ALLOW ENOUGH ANGLE

IRON OVERHANG TO

PERMIT OPENING THE

BLOWER DOOR

3/8 INCH THREADED ROD

2 INCH ANGLE IRON

JAM NUTS

LOCK WASHER

FLAT WASHER

SUPPLY AIR PLENUM

RETURN AIR PLENUM

SUSPENDED INSTALLATION

INSTALLATION POSITIONS

Non-Suspended Installation

Maintain clearances to combustibles as outlined in Table 2

on page 6. The furnace must be supported in such a way

as to not allow twisting or sagging of the cabinet.

Horizontal Suspended Installation

or left position by field fabricated a cradle of angle iron and

threaded rod. Secure the furnace with 2 inch minimum

slotted angle or equivalent, as shown in figure below. The

furnace must be supported in such a way as not to allow

twisting or sagging of the cabinet. Position the supports so

as not to interfere with accessing the burner and blower

compartments.

The furnace may be suspended in either the horizontal right

Upflow Installation

The combustion air and exhaust vent may exit through

the top, left or right side of the cabinet when viewed in

the upflow position. The inducer is installed so that the

exhaust vent may exit the top and left sides without

requiring rotation.

Ifexhaust vent exits the top panel, use the two street

elbows to route the vent. One elbow secured to the

inducer drain connector, will angle toward the front of

cabinet with the second nested inside directed towards

the top panel. (The 108,000 BTUH will require an

extension between the inducer and the first elbow that

is not provided.)

If exhaust vent exits the left-side panel the pipe can be

routed straight outside the cabinet. If exhaust vent

exists the right-side panel the inducer requires

rotation.

The exhaust vent pipe exiting the cabinet in any

installation should be long enough to install the vent

clamp on the outside of the cabinet. COMBUSTION AIR

EXHAUST VENT

CONDENSATE DRAIN

Downflow Installation

When the furnace is installed in the downflow position

the combustion air and exhaust vent may exit through

the left or right side of the cabinet (when viewed in the

upflow position.). The inducer is installed so that the left

side exits require no rotation.

If exhaust vent exits the left-side panel the pipe can be

routed straight outside the cabinet.

If exhaust vent exists the right-side panel the

inducer requires rotation.

The pipe exiting the cabinet in any installation should be

long enough to install the vent clamp on the outside of

the cabinet.

WARNING

WHEN INSTALLED IN THE DOWNFLOW POSITION ON A

COMBUSTIBLE FLOOR, SUBBASE KIT #30476 IS

REQUIRED. FAILURE TO INSTALL SUBBASE KIT COULD

RESULT IN FIRE, DEATH OR SERIOUS INJURY.

The opening in the floor must provide adequate clearances

to the combustible material.

A half-inch of clearance will be required between the

plenum and the combustible material. If installed on a

non-combustible material, zero clearance is required.

In the downflow installation, this furnace can only vent

through the left or right side of the furnace.

The condensate drain trap can be mounted on the right or

left side.

COMBUSTION AIR

EXHAUST VENT

CONDENSATE DRAIN

SUBBASE KIT - REQUIRED WHEN

INSTALLED IN THE DOWNFLOW POSITION

ON A COMBUSTIBLE FLOOR

The furnace must be installed level or sloping towards

the front to facilitate proper drainage.

IMPORTANT

It is not permissible to use a rear of the

furnace as a return.

NOTE

The furnace must be installed level or sloping towards

the front to facilitate proper drainage.

IMPORTANT

It is not permissible to use a rear of the

furnace as a return.

NOTE

Horizontal Left Installation

In the horizontal left installation the combustion air and

exhaust vent may exit through the top or left side of the

cabinet (when viewed in the upflow position). It is not

permissible to vent downwards. The inducer is installed

so that the top and left side exits require no rotation.

Ifexhaust vent exits the top panel, use the two street

elbows to route the vent. One elbow secured to the

inducer drain connector, will angle toward the front of

cabinet with the second nested inside directed towards

the top panel. (The 108,000 BTUH will require an

extension between the inducer and the first elbow that

is not provided.)

If exhaust vent exits the left-side panel the pipe can be

routed straight outside the cabinet.

The pipe exiting the cabinet in any installation should be

long enough to install the vent clamp on the outside of

the cabinet.

Horizontal Right Installation

In the horizontal right installation the combustion air

and exhaust vent may exit through the top or right side

of the cabinet (when viewed in the upflow position). In

the horizontal right installation, it is not permissible to

vent downwards. The inducer will require rotation if

the right side exit is used.

If exiting the top panel, use the two street elbows to

route the vent. One elbow secured to the inducer drain

connector, will angle toward the front of cabinet with

the second nested inside directed towards the top panel.

(The 108,000 BTUH will require an extension between

the inducer and the first elbow that is not provided.)

If exiting the right-side the pipe can be routed straight

outside the cabinet after the inducer has been rotated.

The pipe exiting the cabinet in any installation should be

long enough to install the vent clamp on the outside of

the cabinet.

COMBUSTION AIR

EXHAUST VENT

CONDENSATE DRAIN

WARNING

DO NOT ALLOW GAS PIPING TO BE ROUTED THROUGH

JOIST SPACES THATARE USED FOR RETURN AIR PUR-

POSES. DO NOT USE JOIST SPACES FOR RETURN AIR

PURPOSES IF THE JOIST SPACE ALREADY CONTAINS

PLUMBING STACKS, CHIMNEY COMPONENTS, ETC.

UNLESS THE PORTION USED FOR RETURN AIR PURPOS-

ES CAN BE COMPLETELYISOLATED FROM PORTIONS

WITH OTHER USAGES.

The outdoor grilles must be installed in a location

where they will not be obstructed in any manner.

If grilles are used on the outside wall, they must be

sized properly. Most sidewall grilles have only 50%

free area, so the grill size opening must be twice the

size of the free air opening requirement.

IMPORTANT

The choices are (a) use the direct vent option; (b) obtain

outdoor air from elsewhere; or (c) interlock the attic

exhaust fan with the furnace such that the two cannot

operate simultaneously.

CASE 4:

FURNACE LOCATED IN A CONFINED SPACE, OUTDOOR

AIR DUCTED HORIZONTALLY

Similar to CASE 3, outdoor air for combustion and ventila-

tion may be drawn through horizontal ducting.

Consult the appropriate installation code for the free area

for openings. If other fuel burning appliances are present,

their combustion air and ventilation air requirements must

be added to those of the furnace.

CASE 3:

FURNACE LOCATED IN A CONFINED SPACE, OUT-

DOOR

AIR FROM ATTIC OR CRAWL SPACE

In this circumstance, refer to the appropriate installa-

tion code for the free area of the combustion and

ventilation air openings. If other fuel burning appli-

ances are present, their combustion air and ventilation

air requirements must be added to those of the fur-

nace. If the attic has an exhaust fan (power vent), it

may create a negative pressure sufficiently large

enough to prevent the attic from being an effective

source of combustion and ventilation air.

Powered attic fans do not customarily run during the

heating season; however, some are controlled by a

humidistat as well as a thermostat, which may allow

some operation during the heating season.

If an exhaust fan, fireplace, clothes dryer or any simi-

lar device is present in the indoor area from which the

combustion and ventilation air will be drawn, negative

pressure could be a problem if natural infiltration

from the outdoors does not match the rate at which

air is exhausted.

IMPORTANT

If planning to use the inside air of an unconfined

space, remember to test for proper furnace operation

(as well as other fuel burning appliances located

within the unconfined space) with respect to adequate

combustion and ventilation air with fireplace dampers

open, clothes dryer running, bathroom exhaust fans

on, kitchen range hood on, etc.

NOTE

CASE 2:

FURNACE LOCATED IN A CONFINED SPACE

Aconfined space, (any space smaller than the minimums

discussed in CASE 1), must have two air openings one with-

in 12 inches of the ceiling and the other within 12 inches of

the floor.The air openings must be sized based on whether

the combustion and ventilation air is being taken from

indoors or outdoors, the method outdoor air (if used) is

introduced, and taking into account any other fuel burning

appliances in the confined space.

If sufficient indoor combustion and ventilation air is avail-

able for the furnace and all other fuel burning appliances,

even when clothes dryers, bathroom fans, range hoods, etc.

are running, size each opening according to the appropri-

ate installation codes.

If using grilles to cover the two openings, factor in the

free area of the grille. Typically, a grille will have a

free area approximately 50% of its nominal size.

Consequently,if the required opening is 10 inches x 10

inches , it will have to be doubled if using a sidewall

grille with 50% free area.

NOTE

CASE 1:

FURNACE LOCATED IN AN UNCONFINED SPACE

Unconfined space does not necessarily mean that combus-

tion and ventilation will not have to be introduced from

the outdoors, particularly in airtight homes. Refer to the

appropriate installation code requirements regarding the

minimum combustion air required for all fuel burning

appliances located within the unconfined area.

Ifthe amount of combustion and ventilation air is insuffi-

cient to properly operate the furnace and other fuel burn-

ing appliances within the unconfined area, it will be neces-

sary to supply it from the outdoors based on the criteria

used when calculating the air supply for a confined space.

FIGURE 1

DANGER

The following types of installation sites (but not limited

to the following) will require OUTDOOR AIR for

combustion because of chemical exposures: commercial

buildings, buildings with indoor swimming pools,

furnaces installed in laundry rooms, furnaces in hobby

orcraft rooms, furnaces installed near chemical storage

areas.

Direct Venting Pipe Connections

(USING OUTDOOR COMBUSTION AIR)

The direct vent configuration is the preferred instal-

lation method. The primary advantages are:

•Dedicated combustion air and vent piping elimi-

nates the need to use already heated air for

combustion purposes

•The probability of corrosive contaminants being

present in the combustion air is greatly reduced

•The direct vent configuration is unaffected by

any other appliances, exhaust fans, or other

devices that tend to create negative pressure

conditions while operating

•No vents for combustion and ventilation air are

required in confined spaces

CAUTION

Combustion air must be free of acid forming chemicals

such as sulphur,fluorine and chlorine. These elements

are found in aerosol sprays, detergents, bleaches,

cleaning solvents, air fresheners, paint and varnish

removers, refrigerants, and many other commercial and

household products.

When burned in a gas flame, vapors from these products

form acid compounds. Acid compounds increase the dew

point temperature of the flue products and are highly

corrosive after they condense.

Any furnace failure caused by corrosive elements is

excluded from warranty coverage.

Exposure to the following substances in the combustion

air supply (but not limited to the following) will also

require OUTDOOR AIR for combustion:

•Aerosols, particularly CFC based or propelled aerosols

•Air fresheners

•Airplane Glue and similar adhesives and cements

•Ammonia, as commonly found in permanent wave

solutions used in hair dressing salons

•Antistatic fabric softeners used in clothes dryers

•Carbon tetrachloride

•Chlorinated cleaners and waxes

•Chlorine and bromine based swimming pool chemicals

•Deicing salts or chemicals, e.g. rock salt, etc.

•Dry cleaning fluids such as perchloroethylene

• Fumes from curing polyurethane and similar

substances

•Halogen based refrigerants including R-12 and R-22

•Hydrochloric acid, muriatic acid and other acid based

masonry washing and curing materials

• Printer’s inks, paint removers, varnishes, varsol,

toluene, etc.

•Water softener salt and chemicals

The supplied adapter is made of PVC. If planning to

use ABS pipe, use an all-purpose cleaner and ABS to

PVC transition cement. If planning to use CPVC pipe,

use an all-purpose cleaner, a clear or purple primer

and all-purpose cement approved for the purpose.

Additional information about cleaners, primers, sol-

vents and cements may be obtained from their manu-

facturers.

IMPORTANT

The combustion air piping, like the exhaust piping, must be

air tight throughout the system. The adapter joining the

combustion air to the furnace is supplied with a gasket to

maintain the seal.

FURNACE VENTING

AIR FOR PROPER COMBUSTION AND VENTILATION OF

THIS FURNACE AND ANY OTHER FUEL BURNING

APPLIANCE MUST BE PROVIDED WITH ENOUGH FRESH

THE FLUE GASES. MOST HOMES WILL REQUIRE THA

OUTSIDE AIR BE BROUGHT TO THE FURNACE AREA.

FAILURE TO DO SO CAN CAUSE PERSONAL INJURY OR

DEATH FROM CARBON MONOXIDE POISONING.

READ, UNDERSTAND AND FOLLOW ALL INSTRUCTIONS

IN THIS SECTION. FAILURE TO PROPERLY VENT OR

SUPPLYCOMBUSTION AIR TO THIS FURNACE CAN

CAUSE CARBON MONOXIDE POISONING, OR AN

EXPLOSION OR FIRE, RESULTING IN PROPERTY DAMAGE,

PERSONAL INJURY OR LOSS OF LIFE.

DANGER

This furnace is certified as a Category I Type FSP Non-

Direct and Direct Vent Furnace. When installed as a direct

Combustion Air Inlet Piping

vent furnace, all combustion air is supplied from the out-

doors via the plastic piping system. All components are

field supplied except for the adapter used to connect the

piping to the furnace.

WARNING

READ AND FOLLOW ALL INSTRUCTIONS IN THIS SEC-

TION. FAILURE TO PROPERLYVENT THIS FURNACE CAN

CAUSE CARBON MONOXIDE POISONING OR AN EXPLO-

SION OR FIRE RESULTING IN PROPERTY DAMAGE, PER-

SONAL INJURYOR LOSS OF LIFE.

Definitions

"Vent" and "Chimney" refer to open passageways that

convey vent gases from the furnace, or its vent connector,to

the outside. Vents and chimneys usually run vertically or

nearly vertically.When they serve only one gas appliance,

they are called "dedicated" vents or chimneys. When they

serve multiple gas appliances, they are called "common"

vents or chimneys.

"Vent Connector" refers to a pipe or duct that connects the

furnace to a vent or chimney. Vent connectors usually run

from the furnace’s vent collar to the vent or chimney. Vent

connectors may have vertical and horizontal runs.

"Venting System" refers to a continuous open passageway

from the vent collar to the outside. Venting systems usually

have a vent connector(s) and a vent or chimney. Venting

systems commonly serve a single furnace, or a single

furnace and a hot water heater.Other multiple appliance

venting systems are less common.

"Fan Assisted Combustion System" refers to an appliance

equipped with an integral mechanical means to either draw

or force products of combustion through the combustion

chamber and/or heat exchanger. This series furnace uses a

draft inducer to draw combustion products through the

heat exchanger and is considered to have a fan assisted

combustion systems must not be vented into single wall

metal vents.

WARNING

NEVER ALLOW THE PRODUCTS OF COMBUSTION FROM

THE FLUE TO ENTER THE RETURN AIR OR SUPPLY AIR

DUCTWORK.

ALL RETURN AIR DUCTWORK MUST BE ADEQUATELY

SEALED AND SECURED TO THE FURNACE WITH SHEET

METAL SCREWS. TAPE THE SHEET METAL SEAMS IN THE

VICINITY OF THE FURNACE WITH DUCT TAPE OR

SIMILAR MATERIAL.

WHEN THE FURNACE IS MOUNTED ON A PLATFORM

WITH RETURN AIR THROUGH THE BOTTOM, IT MUST BE

SEALED AIR TIGHT BETWEEN THE FURNACE AND THE

RETURN AIR PLENUM. THE FLOOR OR PLATFORM MUST

PROVIDE SOUND PHYSICAL SUPPORT OF THE FURNACE

WITHOUT SAGGING, CRACKS OR GAPS AROUND THE

BASE, PROVIDING A SEAL BETWEEN THE SUPPORT AND

THE BASE.

FAILURE TO PREVENT PRODUCTS OF COMBUSTION

FROM BEING CIRCULATED INTO THE LIVING SPACE CAN

CREATE POTENTIALLYHAZARDOUS CONDITIONS,

INCLUDING CARBON MONOXIDE POISONING THAT

COULD RESULTIN PERSONAL INJURYOR DEATH.

TABLE F

RECOMMENDED AIR FILTER AREA (SQUARE INCHES),

FOR DISPOSABLE AND PERMANENT TYPE FILTERS

COOL

(TONS)

AIR FLOW

(SCFM) AREA

(INCH

)

AREA

(INCH

)

1.5

2.5

3.5

650

810

1000

1150

1350

1550

1750

312

389

480

552

648

744

840

156

194

240

276

324

372

420

919

1226

1532

1839

441

588

735

883

221

294

368

441

HEAT INPUT

(BTU/HR)

54,000

72,000

90,000

108,000

RECOMMENDED AIR FILTER AREA (SQUARE

INCHES), FOR DISPOSABLE AND PERMANENT

TYPE FILTERS

Air Filters

IAQ types of air filters may cause higher static, higher

temperature rise and erratic furnace operation and, with an

ECM drive, can cause blower over speed more noise. Also

the consumer may at some time want to add UV treatment,

and electrostatic air cleaners or HEPA filters. Thus the return

duct should be sized larger than traditionally and also more

clearance space allow around the return duct for future

equipment.

Angling the air filter is one method of installing a larger

Exhaust Vent Piping

combustion system. Category I furnaces with fan assisted

filter sizes. By examining the table one can see that many

in poorer air quality.

existing installations have undersized air filters, resulting

area air filter. Table below shows the recommended air

DISPOSABLE PERMANENT

Guidelines

•Venting may be vertical or horizontal.

•

•Horizontal piping must slope back towards the furnace

at a minimum rate of 1/4” to the foot, so that

•Horizontal runs must be supported at least every 3

feet. Horizontal sections must not dip or sag

•All vent runs through unconditioned space where

freezing might occur should be insulated with 1”

thick, medium density, foil-faced Fiberglass insulation.

An equivalent “arm-aflex” or “rub-a-tex” may also be

used as long as there is no heat tape applied to the

vent pipe. For horizontal runs where water may

collect, wrap the vent pipe with self regulating 3 or 5

watt heat tape. The heat tape must be CSA, UL, or ULC

listed and installed per the manufacturer’sinstructions.

•DO NOT COMMON VENT WITH ANY OTHER

APPLIANCE.

•If venting vertically, do not vent up a chimney serving

another appliance or install in a chase with a metal or

high temperature plastic pipe from another gas or fuel

burning appliance unless the required clearances to

combustibles can be maintained between the PVC pipe

and other pipes.

• All exhaust piping must be installed in accordance

with CAN/CGA-B149.in Canada; the latest edition of

National Fuel Gas Code, NFPA 54 / ANSI Z223.1 in the

United States, as well as in accordance with local

codes.

• Take the building orientation and the presence of

other buildings or other nearby structures into

consideration when planning the venting system

location. Certain external structures could create air

turbulence around the vent termination leading to

downdrafts and similar venting problems. In windy

and hill locations, roof venting may improve

operations. Maximum venting length is based on 30

mph winds, areas where higher gusts are dominant it

is suggest to shorten the horizontal vent length,

increase the diameter of the vent, or vent vertically.

•The exhaust vent and combustion air intake shall be

installed so that both are located in the same wind

pressure zone.

CAUTION

FAILURE TO FOLLOW ALL VENTING GUIDELINES MAY

RESULT IN ERRATIC FURNACE OPERATION, FREEZE-UP

OF THE VENTILATION AIR PIPING, OR SOOTING OF THE

FURNACE.

DANGER

SOLVENT CEMENTS AND PRIMERS ARE HIGHLYFLAM-

MABLE. PROVIDE ADEQUATE VENTILATION AND DO

NOT ASSEMBLE NEAR HEAT SOURCE OR OPEN FLAME.

DO NOT SMOKE. AVOID SKIN OR EYE CONTACT.

OBSERVE ALL CAUTIONS AND WARNINGS PRINTED ON

MATERIAL CONTAINERS. FAILURE TO FOLLOW THESE

GUIDELINES MAY RESULT IN FIRE, EXPLOSION OR AS-

PHYXIATION CAUSING PERSONAL INJURY OR LOSS OF

LIFE.

JOINING PIPE AND FITTINGS

Acceptable Materials for Combustion Air and

Exhaust Vent Pipe

The furnace products of combustion include both flue

gases and condensate. All venting and drain materials are

plastic.

The combustion air and vent piping and fittings may be

comprised of:

•Schedule 40 PVC, ASTM D1785 or CSA B137.3

•PVC-DWV, ASTM D2665 or CSA B181.2

•ABS-DWV, ASTM D2661 or CSA B181.1

•Schedule 40 CPVC, ASTM F441 or CSA B137.6

In Canada, construct all combustion-air and vent pipes for

this unit of CSA or ULC S636 listed schedule-40 PVC, PVC-

DWV or ABS-DWV pipe and pipe cement. SDR pipe is not

approved in Canada. In addition, the first three feet of the

exhaust must be accessible for visual inspection.

Procedure for Cementing Joints (ASTM D2855):

It is preferable to use a single type of plastic throughout

the venting and combustion air piping; however, if

dissimilar piping or fitting materials are used, they must be

joined with an appropriate transition cement. Dissimilar

pipe segments may be joined together by mechanical

means (i.e., 2” rubber coupling).

WARNING

All pipe, fittings, solvent cement, primers and

procedures must conform to American National

Standards Institute and American Society for Testing

Materials (ANSI / ASTM) standards.

PIPE AND FITTINGS: ASTM D1785, D2466 and D2564

PVC PRIMER AND SOLVENT CEMENT: ASTM D2564

ABS PIPE AND FITTINGS: Use ABS Primer and Solvent

Cement D2235

CPVC SOLVENT CEMENT:F493

For proper installation, DO NOT thin or use solvent

cement that has become curdled, lumpy or thickened.

IMPORTANT

condensate drains towards the furnace.

Minimum vent length - 25 total equivalent feet.

(See page 18, Table 4 - Venting Table)

PROCEDURE:

This guide is intended specifically for PVC pipe; however,

the general procedure applies to all plastic piping systems.

MATERIALS: PVC Cleaner / Primer and PVC Solvent Cement.

After cutting pipe, remove all ragged edges and burrs.

This will reduce restriction (pressure drop) throughout

the venting and combustion air system.

IMPORTANT

1. Cut the pipe end square. Chamfer edge of pipe. Clean

the fitting socket and pipe joint area of all dirt, grease

and moisture.

2. After checking the pipe and socket for proper fit, wipe

socket and pipe with cleaner / primer. Apply a liberal

coat of primer to inside surface of socket and outside

surface of pipe. DO NOT ALLOW THE PRIMER TO DRY

BEFORE APPLYING THE CEMENT.

If alignment is critical, make an alignment mark with a

lead pencil on the outside of the socket to the portion

of pipe beyond the joint. This will allow proper align-

ment as the joint is processed.

NOTE

Cement must be fluid; if not, re-coat.

NOTE

3. Apply a thin coat of solvent cement to the inside sur-

face of the fitting socket. Quickly apply a heavy coat

of solvent cement to the pipe end and insert it into

the socket with a slight twisting motion until it bot-

toms out. If alignment is critical, match up the pencil

marks made prior to this step.

4. Hold the pipe in the fitting for 30 seconds to prevent

the tapered socket from pushing the pipe out of the

fitting. Failure to do this may result in a weak or leaky

joint.

5. Wipe all excess cement from the joint with a rag.

Allow 15 minutes before handling. Cure time varies

according to fit, temperature and humidity.

Observe shelf precautions printed on containers. Minimize

the exposure of the container’s contents to air.

For applications below 32°F (0°C), use only low

temperature-type solvent cement.

Stir the solvent cement frequently while using. Use a

natural bristle brush or the dauber supplied with the

container. If a dauber was not supplied, a 1 inch brush

is ideal.

NOTE

CAUTION

Moisture in the flue gases condenses as it leaves the

terminal. This moisture can freeze on exterior walls, on

soffits, and other nearby objects. Some discoloration is

to be expected; however, improper location or installa-

tion can cause structural or exterior finish damage to

the building. Caulk all cracks, seams or joints within a 6

foot radius of the termination.

Direct Vent Piping Termination

General Guidelines

The external portion of the piping in all cases is to consist

of 2” pipe. If 3” pipe is used between the furnace and

terminal, transition to 2” within 18” or less of the exterior

wall.

When 3” pipe is used, exit the cabinet with 2” pipe.

Reduce or increase immediately after exiting the cabinet in

avertical run making provisions to secure the vent bracket

between cabinet and fitting.

Avoid locating the terminals where the flue gas could

become stagnant and allow recirculation into the

combustion air intake.

Avoid locating the terminal in locations where dripping

condensate may cause problems such as sidewalks, patios,

above planters, near windows where exhaust gases may

cause fogging, etc.

Avoid locating the termination too close to shrubs and

other vegetation. The condensate may stunt or kill them.

the termination.

Do not terminate under a deck unless there is adequate

clearance to prevent damage from the flue gases. A

termination may be located at the end of a patio deck.

Piping running beneath the deck must be suitably

insulated and suspended in a manner to prevent

condensate from collecting and freezing.

Do not locate the terminal on the side of the building

facing the prevailing winter winds.

Avoid locating the terminal in locations where dripping

condensate may cause problems such as side walks, patios,

above planters, near windows where exhaust gases may

cause fogging, etc. Avoid locating the termination too

close to shrubs and other vegetation. The condensate may

stunt or kill them.

The vent terminal should be located no fewer than 6 feet

from an inside corner formed by two exterior walls. A 10

foot distance is recommended.

CAUTION

Improper location or installation can result in structural

damage to the building, damage to the exterior finish

of the building, or may allow recirculation or freezing

of the flue gases onto or into the combustion air

intake. Moisture in the flue gases condenses as it leaves

the terminals. This moisture can freeze on exterior

walls, soffits, and other nearby objects. Some discol-

oration is to be expected.

Caulk all cracks, seams or joints within a 6 foot radius of

PIPE SIZE NUMBER OF 90° ELBOWS

MAXIMUM ALLOWABLE

STRAIGHT LENGTH OF EXHAUST OR INTAKE

0123456

S - 24” for Service

C - Combustible floor but not carpet or non-ceramic tile

NC - Non-combustible floor or use base kit #30476

MODEL

054

072

090

108

ALL DIMENSIONS IN INCES

150

140

130

120

110

100

140

130

120

110

100

140

130

120

110

100

140

130

120

110

100

150

TABLE 4:

VENT LENGTHS- DIRECT/NON-DIRECT VENT LENGTHS

• Count concentric vent fitting as straight pipe.

•Use medium or long sweep elbows where possible.

•One 90°elbow is equivalent to two 45°elbows.

• For direct vent, the above is the length allowed for

each vent (intake and exhaust)

• For non-direct vent, the above is length allowed

for exhaust. The intake should have a two inch

upside down “U” intake installed on the cabinet

intake fitting.

WARNING

DO NOT CONNECT FURNACE TO A CHIMNEY OR FLUE

SERVING OTHER APPLIANCES OR A SOLID FUEL BURN-

ING APPLIANCE.

Recommended clearance for overhangs is a minimum of 1

foot vertically for each foot horizontally up to 6 feet.

As a protection against freezing, do not expose a 3 x 2

reducing coupling to outdoor ambient temperatures.

Any adjacent painted surfaces should be in good condition;

no cracks, peeling paint, etc. If wooden surfaces that may

be periodically exposed to flue gases are present, consider

treating with a sealer.

Calculating Piping Length

When calculating allowable vent lengths, be sure to count

all termination fittings in addition to counting the

concentric vent as a straight pipe. The ventilation pipe

extending through the roof must extend 18” above the

highest point where it extends through the roof, surface

and above any obstruction within an 18” horizontal

distance. The ventilation pipe must extend a minimum of

12” above the anticipated snow level.

Exterior vent pipe greater than 24” should be insulated

with 1/2” insulation to prevent moisture from freezing

within the pipe and accumulating.

Size the ventilation pipe as specified in Table 4 - Direct and

Non-Direct Vent Lengths. This table lists the maximum

allowable length of pipe with respect to the number of 90°

elbows used. For the purposes of this calculation, one 90°

elbow is equivalent to two 45° elbows.

Concentric venting terminal kits may be used for this series

furnace. They provide a means of obtaining combustion air

and exhausting products of combustion utilizing a single

penetration through the exterior wall. This can be useful

when there is limited wall space available. Kits are available

in 2” and 3” sizes. Read the instructions supplied with the kit

for additional installation instructions and details.

The concentric venting terminal has the combustion air intake

built into the assembly. If using the concentric vent terminal,

there must be a minimum of 12” clearance to grade or antici-

pated snow level. There are no means available to raise the

terminal externally. If planning to use this terminal kit, see

The concentric vent termination kits may also be used in the

vertical position.

VENT

COMBUSTION AIR

MAINTAIN 12” CLEARANCE

(18” FOR CANADA) ABOVE HIGHEST

ANTICIPATED SNOW LEVEL.

MAINTAIN 12” CLEARANCE

(18” FOR CANADA) ABOVE HIGHEST

ANTICIPATED SNOW LEVEL. MAXIMUM

24” ABOVE ROOF.

TERMINATION OF COMBUSTION AIR

AND VENTILATION PIPE USING A

CONCENTRIC VENTING KIT

STRAP (FIELD SUPPLIED)

1” MAXIMUM

ELBOW (FIELD SUPPLIED)

Figure 3

Figure 4

Figure 5

Figure 6

Figures 5 and 6.

If the required clearance to grade or anticipated snow level

cannot be obtained with the “straight through”

configuration, the exhaust pipe may be “periscoped” up to

24” to gain extra height. (Figure 9) In this case, the flue

gases may be expelled horizontally. Use the same size pipe

as the interior run and count the fittings and length as

part of the total vent length.

If winter prevailing wind conditions are variable and likely

to occasionally blow flue gases back in on the combustion

air intake, the exhaust termination may be raised 18-24”

above the combustion air intake terminal to take

advantage of the natural buoyancy of the flue gases to

help prevent re-circulation of the exhaust. (Figure 9)

Length of pipe and elbows count toward maximum

allowable vent length as shown in Table 4.

NOTE

Horizontal Combustion Air Termination

The combustion air termination is a 2” medium or long

sweep 90° elbow pointing downward to prevent rain from

readily entering the combustion air intake piping. An

intake screening is optional; however, unless there is a

compelling reason to use one, the screen may actually

encourage the formation of rime ice, which could cause

the intake to become blocked in certain weather

conditions.

Horizontal Exhaust Vent Termination

Horizontal vents should pass through the exterior wall.

Figure 8 shows a standard horizontal vent detail. Terminate

the vent approximately 8” or more from the wall. If it is

not possible to obtain proper clearance to grade or antici-

pated snow level by a straight out configuration, the ter-

mination may be raised by the use of a pair of 90° elbows.

The exhaust termination is normally a 2” 45° elbow or a

medium or long sweep 90° elbow pointing within 45° of

the downward position, away from the combustion air

intake terminal.

HORIZONTAL TERMINATION OF COMBUSTION AIR

AND EXHAUST VENT

If the required clearance to grade or anticipated snow level

cannot be obtained with the “straight through” configura-

tion, the combustion air intake pipe may be “periscoped”

up to 24” to gain extra height (Figure 9)

TOP VIEW

INTERIOR

EXTERIOR

ROOF

OVERHANG

12”-18”

EXHAUST VENT

COMBUSTION AIR

8”

12”

2”

12” CLEARANCE ABOVE GRADE OR

ANTICIPATED SNOW LEVEL

12”- 18”

GRADE OR ANTICIPATED SNOW LEVEL

18” MAX

OUTSIDE WALL

Figure 7

Figure 8

Figure 9

COMBUSTION AIR

EXHAUST

8”

12”

2”

12” CLEARANCE ABOVE GRADE OR

HIGHEST ANTICIPATED SNOW LEVEL.

COMBUSTION AIR

EXHAUST

8”

12”

2”

12” CLEARANCE ABOVE GRADE OR

HIGHEST ANTICIPATED SNOW LEVEL.

TOP VIEW

INTERIOR

EXTERIOR

Vertical Combustion Air Termination

The combustion air termination is a pair of 2” medium or

long sweep 90° elbows pointing downward to prevent rain

from entering the combustion air intake piping.

If 3” piping is used, it should be reduced to 2” within 18”

of the point where the pipe penetrates the roof. The ter-

mination inlet must be positioned within 3” of the com-

panion exhaust piping.

The combustion air inlet must be located a minimum of

12” above the anticipated snow level, and 12” below the

exhaust outlet.

Vertical Exhaust Vent Termination

The exhaust vent may terminate in a vertical venting

configuration through the roof.

No termination fitting is required if venting vertically

through a roof. The end of the exhaust pipe must be 12”

higher than the entrance of the combustion air intake

terminal.

The exhaust pipe extending through the roof must extend

aminimum of 18” above any obstruction within an 18”

horizontal distance.

VERTICAL TERMINATION OF

COMBUSTION AIR

AND EXHAUST VENT

TOP VIEW

INTERIOR

EXTERIOR

WARNING

COMMON VENTING IS PROHIBITED

If two of these furnaces are to be installed in close proximi-

ty, the combustion air intake and exhaust terminations may

If more than two furnaces are being installed in close prox-

imity, each additional combustion air intake and exhaust

termination set must be installed a minimum of 4 feet

apart. This is an exception to the 10 foot requirement men-

tioned in the “Location” section on the previous page. If

using the concentric venting kits, two terminals may be

centered 12 inches apart.

When installing multiple furnaces in close proximity,

each requires dedicated combustion air and exhaust

venting.

IMPORTANT

MULTIPLE VENTING

Figure 10

be installed as shown in Figures 10.

8”

DANGER

SOLVENT CEMENTS AND PRIMERS ARE HIGHLY

FLAMMABLE. PROVIDE ADEQUATE VENTILATION AND DO

NOT ASSEMBLE NEAR HEAT SOURCE OR OPEN FLAME. DO

NOT SMOKE. AVOID SKIN OR EYE CONTACT. OBSERVE ALL

CAUTIONS AND WARNINGS PRINTED ON MATERIAL

CONTAINERS. FAILURE TO FOLLOW THESE GUIDELINES

MAY RESULT IN FIRE, EXPLOSION OR AS-PHYXIATION

CAUSING PERSONAL INJURYOR LOSS OF LIFE.

WARNING

THIS FURNACE AND ANY OTHER FUEL BURNING

APPLIANCE MUST BE PROVIDED WITH ENOUGH FRESH

AIR FOR PROPER COMBUSTION AND VENTILATION OF

THE FLUE GASES. MOST HOMES WILL REQUIRE THAT

OUTSIDE AIR BE BROUGHT TO THE FURNACE AREA.

FAILURE TO DO SO CAN CAUSE PERSONAL INJURY, OR

DEATH FROM CARBON MONOXIDE POISONING.

NON-DIRECT VENT FURNACE

INSTALLATIONS

(USING INDOOR COMBUSTION AIR)

The furnace, although designed as a direct vent type

appliance, may be installed with the intake vent inside

the structure. Non-direct vent installations require only an

exhaust vent pipe.

Non-direct venting may be desirable when:

•Using outdoor combustion air is not practical

•The furnace is in a garage or attic

•Provisions are not made for routing of combustion air

•The outdoor environment may contain contaminants

undesirable for combustion

Connecting a Non-Direct Vent to the Furnace

When using indoor air or the non-direct vent

configuration, the combustion air inlet to the furnace must

be protected from blockage. Use a double elbow

arrangement if supplying combustion air through the top,

or a downward pointing single elbow if supplying

combustion air through the side.

WARNING

READ AND FOLLOW ALL INSTRUCTIONS IN THIS SEC-

TION. FAILURE TO PROPERLY VENT THIS FURNACE CAN

CAUSE CARBON MONOXIDE POISONING OR AN EXPLO-

SION OR FIRE RESULTING IN PROPERTY DAMAGE, PER-

SONAL INJURY OR LOSS OF LIFE.

Ifthe furnace is to be installed in the vicinity of other

fuel burning appliances, adequate combustion air

must be available for the non-direct vent appliances.

See Section 10 of this manual, “Determining

Combustion Air.”

IMPORTANT

IN CANADA

In addition to the general guidelines, in Canada, the non-

direct vent exhaust shall not terminate:

•Directly above a paved sidewalk or paved driveway

which is located between two single-family dwellings

and serves both dwellings;

•Less than 7 feet above a paved sidewalk or paved

driveway located on public property;

•Within 6 feet of a mechanical air supply inlet to any

building;

•Above a meter/regulator assembly within 3 feet

horizontally of the centerline of the regulator;

•Within 6 feet of any service regulator vent outlet;

•Less than 12” above grade level or anticipated snow

level;

•Within 12” of any door, window, or non-mechanical air

supply inlet to any building;

•Within 12” of the combustion air inlet of any other

appliance;

•Underneath a veranda, porch or deck, unless (a) the

veranda, porch or deck is fully open on a minimum of

two sides beneath the floor, and (b) the distance

between the top of the vent termination and the

underside of the veranda, porch or deck is greater

than 12”.

IN THE U.S.A.

In addition to the general guidelines, in the United States,

the non-direct vent exhaust shall be installed in accordance

with the following:

•The clearance from the bottom of the terminal to grade

shall be 12” or increased to maintain 12” above the antici-

pated accumulated snow level.

•The vent shall not terminate over public walkways or

over an area where condensate or vapor could create a

nuisance or hazard.

•The vent terminal shall be installed 4 feet below, 4 feet

horizontally from, or 1 foot above any door, window, sof-

fit, under eave vent or gravity air inlet to the building.

•The vent terminal shall have a minimum horizontal clear-

ance of 4 feet from electric meters, gas meters, regulators

and relief equipment.

•Locate the vent terminal 3 feet above any forced air inlet

located within 10 feet. Any fresh air or make-up air inlet,

such as for a dryer or furnace area is considered a forced

air inlet. The vent terminal should be located no fewer

than 6 feet from an inside corner formed by two exterior

walls; a 10 foot distance is recommended.

Recommended clearance from overhangs is a minimum of

1foot vertically for each foot horizontally up to 6 feet.

Canadian Installations US Installations

A = Clearance above grade, veranda, 12 in (30 cm) 12 in (30 cm)

porch, deck, or balcony

B = Clearance to window or door that 6 in (15 cm) for appliances 10,000 4 ft (121 cm) below or to side of

may be opened Btuh (3 kW), 12 in (30 cm) for opening; 1 ft (30 cm) above opening

appliances > 10,000 Btuh (3 kW) and

100,000 Btuh (30 kW), 36 in (91 cm)

for appliances > 100,000 Btuh (30 kW)

C = Clearance to permanently closed * *

window

D = Vertical clearance to ventilated soffit * *

located above the terminal within

a horizontal distance of 2 ft(61 cm)

from the center line of the terminal

E = Clearance to unventilated soffit * *

F = Clearance to outside corner * *

G = Clearance to inside corner * *

H = Clearance to each side of center 3 ft (91 cm) within a height 15 ft *

line extended above ( 458 cm) above the meter / regulator

meter/regulator assembly assembly

I = Clearance to service regulator 3 ft (91 cm) *

vent outlet

J = Clearance to nonmechanical air 6 in (15 cm) for appliances 10,000 Btuh 4 ft (121 cm) below or to side of

supply inlet to building or the (3 kW),12 in (30 cm) for appliances > opening; 1 ft (30 cm) above

combustion air inlet to any other 10,000 Btuh (3 kW) and 100,000 Btuh opening

appliance (30 kW), 36 in (91 cm) for appliances

> 100,000 Btuh (30 kW)

K = Clearance to a mechanical air supply 6 ft (183 cm) 3 ft (91 cm) above if within 10 ft

inlet (305 cm) horizontally

L = Clearance above paved sidewalk or 7 ft (213 cm) ** 7 ft (213 cm)

paved driveway located on public

property

M = Clearance under veranda, porch 12 in (30 cm) *** *

deck. or balcony

***

family dwellings and serves both dwellings

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

"Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer's

installation instructions."

A vent shall not terminate directly above a sidewalk or paveble Cell Footnoted driveway that is located between two single

For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B1 49.1, the following statement shall be included:

232

Other Then Direct Vent Terminal Clearances

Canadian Installations US Installations

A = Clearance above grade, veranda, 12 in (30 cm) 12 in ( 30cm )

porch, deck, or balcony

B = Clearance to window or door that 6 in (15 cm) for appliances 10,000 6 in (15 cm) for appliances 10,000

may be opened Btuh (3 kW),12 in (30 cm) for Btuh (3 kW), 9 in (23 cm) for

appliances > 10,000 Btuh (3 kW) and appliances > 10,000 Btuh (3 kW)

100,000 Btu (30 kW), 36 in (91 cm) and 50,000 Btuh (15 kW), 12 in (30 cm)

for appliances > 100,000 Btuh (30 kW) for appliances > 50,000 Btuh (15 kW)

C = Clearance to permanently closed * *

window

D = Vertical clearance to ventilated soffit * *

located above the terminal within

a horizontal distance of 2 ft(61 cm)

from the center line of the terminal

E = Clearance to unventilated soffit * *

F = Clearance to outside corner * *

G = Clearance to inside corner * *

H = Clearance to each side of center 3 ft (91cm ) within a height 15 ft *

line extended above (457 cm) above the meter / regulator

meter/regulator assembly assembly

I = Clearance to service regulator 3 ft (91 cm)

vent outlet

J = Clearance to nonmechanical air 6 in (15 cm) for appliances 10,000 Btuh 6 in (15 cm) for appliances 10,000 Btuh

supply inlet to building or the (3 kW),12 in (30 cm) for appliances > (3 kW), 9 in (23 cm) for appliances >

combustion air inlet to any other 10,000 Btuh (3 kW) and 100,000 Btuh 10,000 Btuh (3 kW) and 50,000 Btuh

appliance (30 kW), 36 in (91 cm) for appliances (15 kW), 12 in (30 cm) for appliances

> 100,000 Btuh (30 kW) > 50,000 Btuh (15 kW)

K = Clearance to a mechanical air supply 6 ft (183 cm) 3 ft (91 cm) above if within 10 ft

inlet (305 cm) horizontally

L = Clearance above paved sidewalk or 7 ft (213 cm) ** *

paved driveway located on public

property

M = Clearance under veranda, porch 12 in (30 cm) *** *

deck or balcony

For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B1 49.1, the following statement shall be included:

"Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer's

installation instructions."

A vent shall not terminate directly above a sidewalk or paved driveway that is located between two

single family dwellings and serves both dwellings

*** Permitted only if veranda, porch ,deck, or balcony is fully ope

n on a minimum of two sides beneath the floor.

Direct Vent Terminal Clearances

CONDENSATE DRAINS

The furnace will condense as much as a half pound of

water per hour (approximately 2 imperial quarts, 21/2U.S.

quarts or 21/4liters). It is necessary to make provisions for

draining the condensate away.

The furnace is supplied with a drain trap assembly. See

The drain coupling on the inducer will work better if the

drain holes are pointed down about 15 degrees. The drain

hose supplied with the furnace is long enough to reach

either side panel; however, it must be cut near the blower

division panel and fitted with the elbows and clamps pro-

vided. This is to prevent kinking in the drain lines.

CAUTION

The two inlets to the drain trap are for vent pipe and

condensate collection. The vent pipe inlet is smaller

than the condensate collection inlet. Ensure that the

drain hoses are properly connected.

CAUTION

Ensure that drain hoses do not create traps prior to the

condensate trap assembly. A secondary trap will cause

intermittent operation due to the pressure switches

opening.

DRAIN HOSE INSTALLATION

1. Select a drain trap location suitable for the orientation

of the furnace and remove the corresponding knock-

2. Affix the drain trap assembly to the exterior of the side

panel when the furnace is upflow or downflow using

two screws provided. For horizontal positions the

installer will need to use the mounting bracket sup-

plied and secure the bracket to the top panel. Remove

two top panel screws and fasten bracket to top panel

with removed screws. Secure trap assembly using

screws provided to the mounting bracket.

2. Slide a hose clamp over the end of each hose.

3. Slide each hose over the appropriate inlet.

4. Slide each hose clamp to approximately 1/8” from the

end of the hose.

5. Fasten each drain hose to its inlet by tightening the

hose clamps.

6. Cut each drain hose near the blower division panel, at

the point where kinking is able to occur.

7. Slide a hose clamp over the ends of the hose connect-

ing to the vent drain and condensate drain.

8. Insert an end of the plastic elbow (supplied) into each

hose.

9. Cut hose lengths from the remaining lengths of hose

to fit between elbows and the drain trap inlets of both

the vent drain and the condensate drain.

10. Slide a hose clamp over the ends of the hoses and

secure to their appropriate connection.

Slide each hose clamp to approximately 1/8” to 1/4”

from the end of the hose then tighten.

DRAIN PIPING

Condensate from the outlet of the drain trap assembly

must be conveyed to a floor drain, sump pit, or, if these are

unavailable, to a condensate pump. If using a condensate

pump, be sure that it is approved for use for furnace

condensate.

CAUTION

Do not drain the condensate outdoors. Do not run the

condensate line through areas where freezing might

occur. Freezing of condensate can result in erratic fur-

nace operation and in property damage.

The condensate drainage configuration requires a vent. It

takes less than a one inch rise anywhere along the horizon-

tal route of the drain tube to create a vapor lock, which

will prevent condensate from draining away freely, and

result in erratic furnace operation.

If an air conditioning evaporator coil drain is to share

the furnace drain line, it should be connected with a

tee fitting down-stream from the trap. Do not connect

the evaporator coil condensate drain upstream of the

furnace drain trap assembly.

IMPORTANT

DRAINAGE WITH VENT.

(NEXT PAGE)

FIGURES 11-14 : CONDENSATE TRAP / CONDENSATE

outs. See page 26, figures 11-14.

page 26, Figures 11-14 for possible locations of the drain trap.

HORIZONTAL FLOW RIGHT

CONDENSATE TRAP

HORIZONTAL FLOW LEFT

UPFLOW DOWNFLOW

CONDENSATE CONDENSATE TRAP

TRAP

FIGURE 11 FIGURE 12

FIGURE 13 FIGURE 14

CONDENSATE NEUTRALIZERS

Some local codes may require the use of a condensate neu-

tralizer. If the furnace condensate is to be routed to a sep-

tic system, it may be advisable to use a condensate neutral-

izer.

Condensate neutralizers such as the Ward Industries 90+

Neutralizer are available through heating supply whole-

salers.

When condensate neutralizers are used, it is advisable to

install it with an overflow bypass tube.

CONDENSATE DRAIN INSTALLATION

1. Identify which side the condensate drain trap will be

installed on the unit. Condensate trap may be mount-

ed on either the left or right side of the unit, when

looking at the front. Some installation positions will

only allow one option to mount the drain.

2.Using the appropriate template (left vs. right), mark

the mounting and drain holes.

3.Drill holes and de burr, if necessary

4. Secure the condensate drain trap to the side of the fur-

nace using the mounting holes that were just drilled

5. Install one rubber grommet (provided) into each of the

drain holes and then insert the 90 degree (black) drain

tubes so that they extend down into the top of the

drain trap.

Inside the top front cover, connect the drain tubing

from the flue connector to one of the drain pipes that

were just installed.

Do the same for the second drain pipe located located

in the lower right of the inner front panel. 1/2 ID tub-

ing should be used. It may be necessary to secure the

tubing with a hose clamp depending on the fit. Be

cautious not to over tighten the clamp.

7. Pipe the remainder of the drain to the condensate

pump using PVC pipe. A 3/4” PVC coupling will fit over

the drain connection on the trap.

The condensate drain trap assembly should be full of

water before starting the furnace.

IMPORTANT

B - Open to

Atmosphere

Assembly)

E - Overflow

Bypass Tube

Higher than Trap

D - Tee(1/2" PVC)

PVC)(Minimum 1"

C - Standpipe (1/2"

A - Condensate

Trap Assembly

WARNING

THIS FURNACE IS FACTORY EQUIPPED TO BURN NATURAL

GAS ONLY.

CONVERSION TO L.P. GAS REQUIRES SPECIAL KIT No.

FAILURE TO USE THE PROPER CONVERSION KIT CAN

CAUSE FIRE, EXPLOSION, CARBON MONOXIDE

POISONING, PROPERTY DAMAGE, PERSONAL INJURY OR

LOSS OF LIFE.

CAUTION

CONVERSION OF THIS FURNACE REQUIRES SPECIALIZED

EQUIPMENT. A TRAINED AND QUALIFIED INSTALLER,

SERVICE AGENCY OR GAS SUPPLIER MUST COMPLETE

CONVERSION.

CAUTION

CONNECT THIS FURNACE ONLY TO GAS SUPPLIED BY A

COMMERCIAL UTILITY OR SUPPLIER. PRIVATE GAS WELLS

DO NOT GENERALLYPROVIDE GAS WITH CONSISTENT,

UNIFORM AND PREDICTABLE HEATING VALUES AND

DENSITIES. MANY NON-COMMERCIAL WELLS CONTAIN

IMPURITIES SUCH AS SULPHUR, WHICH MAY DAMAGE

THE FURNACE. THIS FURNACE CANNOT OPERATE

PROPERLY OR SAFELY USING FUELS OUTSIDE NORMAL

COMMERCIAL STANDARDS.

GAS SUPPLY

Gas Piping

In the United States, the gas piping should be installed in

accordance with ANSI Z223.1 / NFPA 54 and any local codes.

In Canada, the gas piping should be installed in accordance

with CAN/CSA-B149, and in accordance with any local codes.

The gas piping may enter the furnace from either side.

Install a BMI ground joint union between the gas valve and

the side panel to allow easy removal of the burner for

service purposes.

CAUTION

ENSURE THAT THE MANUAL SHUTOFF VALVE AND GAS

VALVE ARE NOT SUBJECTED TO HIGH PRESSURES.

DISCONNECT THE MANUAL SHUTOFF VALVE AND GAS

VALVE DURING ANY PRESSURE TESTING THAT EXCEEDS

1/2 P.S.I.G. (3.45 KPA).

w.c.; 12 inches w.c. is recommended.

These pressures must be maintained while all other gas

fired appliances are operating at maximum conditions.

exceed 10.5 inches w.c. inlet pressure with NG.

The gas valve has an adjustable internal regulator for

controlling burner manifold pressure. Burner manifold

pressure is listed on the furnace rating plate.

Leak Testing

All new gas piping installations should be pressure tested as

specified by CAN/CGA-B149 or NFPA 54 ANSI Z223.1 or

ANSI/NFPA58, Standard for the Storage and Handling of

Liquefied Petroleum Gases.

ALWAYS USE A BACKUP WRENCH TO PREVENT

TWISTING OF THE CONTROL ASSEMBLY AND GAS

VALVE. ANY STRAINS ON THE GAS VALVE CAN AFFECT

POSITIONING OF THE ORIFICES RELATIVE TO THE

BURNERS. THIS COULD RESULT IN FAULTY BURNER

OPERATION.

IMPORTANT

Install a manual gas shutoff valve and drip leg as close to

the furnace as possible. Some local codes call for the

manual gas shutoff valve to be located between 4 to 5 feet

above floor level to prevent tampering by small children.

Ensure that the valve is readily accessible.

If local codes allow the use of a flexible gas appliance

connector, always use a new listed connector. Do not use a

connector which has previously serviced another gas

appliance.

The L.P. gas inlet supply pressure should be 11 to 13 inches

The natural gas inlet supply pressure should be 5 to 10.5

inches water column (w.c.); 7 inches w.c. is recommended.

Do not exceed 13 inches w.c. inlet pressure with LP. Do not

194301570001.

CONVERSIONS

High Altitude

In the United States, the modifications for high altitude are

based on a 4 percent reduction of input capacity for every

the impact of altitude for selected elevations. Ratings

shown apply to the highest elevation in range.

Consult with local fuel suppliers or authorities to determine

local regulations or customs.

In Canada, the furnace may be converted for high altitude

(2000 - 4500 feet) by changing the burner orifices. Use Kit

No. 30552. The kit contains both natural gas and L.P. gas

Natural to L.P.Gas

This series furnace is manufactured as a natural gas (sea

level) appliance. It may be converted to L.P. gas with the use

L.P

. to Natural Gas

Although the furnace is manufactured initially as a natural

gas appliance, if after an L.P. Gas conversion it becomes

necessary to convert back to natural gas, and if the original

WARNING

NEVER PURGE A GAS LINE INTO THE COMBUSTION

CHAMBER.

NEVER USE A MATCH, TAPER, CIGARETTE LIGHTER,

FLAME OR ANY OTHER IGNITION SOURCE TO CHECK

FOR LEAKS IN A GAS LINE.

FAILURE TO ADHERE TO THIS WARNING CAN CAUSE A

FIRE OR EXPLOSION RESULTING IN PROPERTY DAMAGE,

PERSONAL INJURY, OR LOSS OF LIFE.

Gas piping that has not been pressure tested, from the

manual shutoff valve to the furnace gas valve for example,

should be leak tested using an electronic combustible gas

detector, a commercially prepared leak detector such as Gas

Leak Detector® or Search®, or other locally approved

method. A leak detector solution can be prepared by mixing

asmall quantity of dish detergent with water and daubing

itonto the gas piping and connections.

Conversion Steps

To convert from sea level to high altitude, from natural gas

to L.P. gas, or from L.P. gas to natural gas, follow these

steps:

Turn off gas supply to the furnace if applicable.

1. Shut off electrical power to the furnace if applicable.

2. Remove the upper front door to expose the gas train and

burner assembly.

3. Unfasten the ground joint union between the gas valve

and gas supply piping if applicable.

4. Unfasten the burner manifold pipe from the burner

assembly. It is held in place by 2 screws on either end of

the manifold pipe.

5. Remove the existing orifices with a 7/16 inch socket, box

or open-end wrench. Install the replacement orifices. The

orifice spuds are brass, and do not normally require pipe

dope. A light grease may be used to lubricate the

threads. The orifice spuds have tapered threads; do not

over-tighten them.

If completing a fuel conversion, remove the protective

screw cap from the gas valve regulator adjustment.

Remove the regulator adjustment screw by turning it

counterclockwise. Remove the existing regulator springs.

6. Install the new regulator springs.

GAS VALVE

Outlet Pressure

Post Set Screw

Regulator

Vent

Inlet Pressure

Post Set Screw

On/OffSwitch

Regulator

Adjustment

3Pin Connector

Regulator

Adjustment

If converting the gas valve, the regulator spring is

tapered. The tapered end (small end) is inserted back

into the gas valve regulator adjustment cavity.

NOTE

7. Reinstall the adjustment screw. Give it 3 full clockwise

turns initially. Do not reinstall the protective screw cap yet.

8. Reinstall the burner manifold pipe assembly following

steps 4, 5, and 6 in reverse order.

of Kit No.194301570001(contact manufacturer for availability).

The kit contains the orifices needed for all models, the

regulator spring for the gas valve, and a label to affix adjacent

to the appliance rating plate to alert subsequent

service technicians of the conversion.

parts are unavailable, Kit No. 194301580001 may be

purchased. It is similar in nature and content to the L.P. Gas

conversion kit.

1000 feet above sea level. Table on page 30 illustrates

orifices; see Table on page 30.

For USA

HIGH ALTITUDE SPECIFICATIONS

Rating Plate

*MANIFOLD PRESSURE NATURAL GAS=3.5 INWC

**MANIFOLD PRESSURE L.P. GAS=10.5 INWC

For- CANADA

HIGH ALTITUDE SPECIFICATIONS

Rating Plate

*MANIFOLD PRESSURE NATURAL GAS=3.5 INWC

**MANIFOLD PRESSURE L.P. GAS=10.5 INWC

54,000

72,000

108,000

High Fire

Qty

High Fire Low Fire Orifice

Qty

Low Fire Orifice

0-2000 54000 51300 35100 33350 1.95mm 1.20mm

2000-3000 47520 45144 30888 29344 1.90mm 1.15mm

54,000 3000-4000 45360 43092 29484 28010 1.90mm 1.10mm 3

4000-5000 43200 41040 28080 26676 1.85mm 1.10mm

5000-6000 41040 38988 26676 25342 1.85mm 1.10mm

0-2000 72000 68400 46800 44460 1.95mm 1.20mm

2000-3000 63360 60192 41184 39125 1.90mm 1.15mm

72,000 3000-4000 60480 57456 39312 37346 1.90mm 1.10mm 4

4000-5000 57600 54720 37440 35568 1.85mm 1.10mm

5000-6000 54720 51984 35568 33790 1.85mm 1.10mm

0-2000 90000 85500 58500 55600 1.95mm 1.20mm

2000-3000 79200 75240 51480 48906 1.90mm 1.15mm

90,000 3000-4000 75600 71820 49140 46683 1.90mm 1.10mm 5

4000-5000 72000 68400 46800 44460 1.85mm 1.10mm

5000-6000 68400 64980 44460 42237 1.85mm 1.10mm

0-2000 108000 102600 70200 66690 1.95mm 1.20mm

2000-3000 95040 90288 61776 58687 1.90mm 1.15mm

108,000 3000-4000 90720 86184 58968 56020 1.90mm 1.10mm 6

4000-5000 86400 82080 56160 53352 1.85mm 1.10mm

5000-6000 82080 77976 53352 50684 1.85mm 1.10mm

0-2000 54000 51300 35100 33350 1.95mm 1.20mm

2001-4500 48600 46170 31590 30011 1.90mm 1.15mm

0-2000 72000 68400 46800 44460 1.95mm 1.20mm

2001-4500 64800 61560 42120 40014 1.90mm 1.15mm

90,000 5

2001-4500 81000 76950 52650 50018 1.90mm 1.15mm

0-2000 108000 102600 70200 66690 1.95mm 1.20mm

2001-4500 97200 92340 63180 60021 1.90mm 1.15mm

0-2000 90000 85500 58500 55560 1.95mm 1.20mm

(BTU/hr) (mm)* (mm)**

Input BTU/hr Altitude(ft) Input Output Input Output Natural Gas LP Gas

(BTU/hr) (BTU/hr) (BTU/hr)

(mm)* (mm)**

(BTU/hr) (BTU/hr) (BTU/hr) (BTU/hr)

Input BTU/hr Altitude(ft) Input Output Input Output Natural Gas LP Gas

SETTING THE MANIFOLD (Outlet) GAS PRESSURE

(F92-1003 36G Valve Pressure Check Kit)

The manifold outlet pressure is specified on the rating

plate.

1. Shut off the gas upstream of valve and move valve

switch to OFF.

2.Using the 3/32 inch hex wrench that is included in the

valve pressure check kit, rotate outlet pressure tap

screw one revolution counter-clockwise.

3.Attach the 5/16 inch hose that is included in the valve

pre check kit to the outlet pressure boss of the valve.

Hose should overlap boss 3/8 inch.

4. Connect 5/16 inch side of connector that is included in

the valve pressure check kit to the hose on outlet boss.

Connect 1/4 inch side of connector to manometer hose.

5. Turn on gas supply to valve and move valve switch to

the ON position.

6. Turn on furnace. For the two stage valve the low rate

must be adjusted first and then the high rate. This can

be done by wiring the Thermostat so that only low fire

runs. Turn off the 1-stage T-stat mode on the control

board if set!

Remove regulator cover screw from the high or low

screw clockwise to increase pressure, or counterclock

Natural Gas: Low outlet pressure is limited to 1 to 4”

W.C. range and high outlet pressure 2 to 5” W C range.

The valve cannot be adjusted outside this range and

the high outlet pressure setting must always be set at

least 1” above the low outlet pressure setting.

LP Gas: Low outlet pressure is limited to 6 to 10” W.C.

range and high outlet pressure in the 8 to 12” W.C.

range. The valve cannot be adjusted outside this range

and the high outlet pressure setting must always be set

at least 2” above the low outlet pressure setting.

7. Using a leak detection solution check for leaks at hose

connections.

12. Turn outlet pressure tap screw clockwise to seal the

pressure point using the supplied hex wrench. Tighten

to 13 in-lbs. minimum. Return all pressure regulator

caps.

13. Turn on gas supply to valve and move valve switch to

the ON position.

14. Turn on furnace following manufacturer instructions.

15. Using leak detection solution check for leaks at outlet

pressure tap. Shut off gas and fix all leaks immediately

before proceeding.

If problems were encountered with obtaining enough

pressure on the manifold, first examine the gas piping

system to ensure that it is correctly sized. Pipe sizing is

specified in ANSI Z223.1/ NFPA 54 in the U.S., or the B148

Natural Gas and Propane Installation Code in Canada.

SETTING THE SUPPLY GAS PRESSURE

(F92-1003 36G Valve Pressure Check Kit)

1. Back inlet pressure test screw (inlet/outlet pressure

boss) out one turn (counterclockwise, not more than

one turn) with a 3/32 inch Allen wrench.

2. Attach a hose and manometer to the inlet pressure boss

of the valve. The manometer should be capable of

reading 0 -15 inches water column.

3. Turn on the gas supply and electrical power to the

furnace.

appliances on the same gas piping system.

5. Note the gas inlet pressure. It should be: Natural Gas: 5

6. If working on a natural gas system, contact the gas

utility.They may insist on any service regulator

adjustments being made by their own staff.

7. Adjustments are made in a similar fashion as the gas

valve regulator. Turn the adjustment screw clockwise to

increase manifold pressure, or counter clockwise to

reduce manifold pressure. When the correct pressure

has been established, securely replace the service

regulator protective screw cap.

8. Shut off the gas at the manual valve and remove

manometer hose from inlet pressure boss.

DANGER

ATRAINED, QUALIFIED TECHNICIAN MUST DO ALL

REGULATOR ADJUSTMENTS. IMPROPER MODIFICATIONS

OR ADJUSTMENTS CAN RESULT IN FIRE OR EXPLOSION

CAUSING PROPERTY DAMAGE, SEVERE PERSONAL INJURY

OR LOSS OF LIFE.

DANGER

SHUT OFF GAS AND FIX LEAKS IMMEDIATELYBEFORE

PROCEEDING.

8. Read manometer. This reading is the system

outlet/supply pressure.

9. Follow manufacturer’s instructions to adjust

outlet/supply pressure, if necessary.

10. Shut-offgas supply upstream of valve and move the

valve switch to the OFF position.

11. Remove manometer and hose from outlet boss.

In some circumstances, high inlet pressure can be remedied

with the use of an inline appliance regulator.If an inline

appliance regulator is used, ensure that it has the capacity to

adequately handle the gas volume required by the furnace

and any other appliances receiving gas from the header

serving the furnace.

4. Start the furnace, and any other gas burning

outlet pressure regulator adjust tower and turn

as specified on the furnace rating label.

wise decrease pressure. Always adjust regulator

to 10.5 inches water column L.P.Gas: 11 to 13 inches

water column.

DANGER

THE FURNACE CABINET MUST HAVE AN

UNINTERRUPTED GROUND.

AGROUND WIRE IS PROVIDED IN THE ELECTRICAL

JUNCTION BOX.

DO NOT USE GAS PIPING AS A GROUND.

FAILING TO GROUND THE FURNACE PROPERLY CAN

RESULT IN ELECTRIC SHOCK RESULTING IN PERSONAL

INJURYOR DEATH.

WARNING

THIS FURNACE IS EQUIPPED WITH A BLOWER DOOR

SAFETY SWITCH. DO NOT DISABLE THIS SWITCH.

FAILURE TO FOLLOW THIS WARNING CAN RESULT IN

ELECTRICAL SHOCK, PERSONAL INJURY, OR LOSS OF LIFE.

If the junction box must be moved to the right hand side:

1. Unfasten the junction box from the left hand side.

2.Remove the right side panel knockout.

3. Remove the junction box cover hook screw and reinstall

iton the opposite side of the box.

4. Fasten the junction box to the right hand panel.

Low Voltage Wiring

The low voltage terminals are located on the control board

The furnace is prewired for air conditioning. Insert the

thermostat and air conditioner contactor low voltage

wiring through the bushing provided in the side panel.

Route the control wiring through the blower compartment

to the 24 volt terminal screws.

Thermostat

The room thermostat must be compatible with the

integrated control in the furnace. Electromechanical

thermostats should be rated 30 V / 1.5 amps.

Most electronic or microprocessor based thermostats except

those with "current robbing" circuits should work

satisfactorily.Consult the instructions of the thermostat

manufacturer for technical and installation details.

Most compatibility problems can be overcome by the use of

an isolation relay.The isolation relay should be SPST with a

24-volt coil. The switch ratings should be a minimum of 0.5

The thermostat and control wiring should be a minimum of

18 AWG copper. Excessive lengths of wire may result in

enough voltage drop to impair the proper functioning of

the furnace. For thermostat wires in excess of 25 feet, use

16 AWG; 50 feet, use 14 AWG.

CAUTION

ELECTRICAL WIRING AND COMPONENTS MUST BE

PROTECTED FROM MOISTURE, INCLUDING WATER AND

CONDENSATE.

ELECTRICAL SPECIFICATIONS

Before proceeding with the electrical connections, ensure

that the available electrical supply is compatible with the

voltage, frequency, and phase listed on the appliance rating

plate.

All furnaces are rated 120 VAC, 60 Hz, 1 phase. The

amperage rating is indicated on the furnace rating plate.

Each furnace requires a dedicated overcurrent device either

acircuit breaker or a Type D, time delay fuse. It is

permissible to connect furnace accessories such as

humidifier transformers, condensate pumps and electronic

air cleaners. If adding accessory equipment to the furnace

circuit, ensure that the combined amperages listed on the

appliance rating plates do not exceed the rating of the over

current device.

DANGER

SHUT OFF ELECTRICAL POWER AT THE FUSE BOX OR

SERVICE PANEL BEFORE MAKING ANY ELECTRICAL

CONNECTIONS. FAILURE TO DO SO CAN CAUSE

ELECTRICAL SHOCK RESULTING IN PERSONAL INJURY OR

LOSS OF LIFE.

In the United States, all electrical work must be in

accordance with the latest edition of the National Electrical

Code, ANSI / NFPA 70, in Canada, all electrical work must be

in accordance with the latest edition of CSA-C22.1, Canadian

Electrical Code Part 1, and any applicable local code.

Although a suitably located circuit breaker may serve as a

service switch, a separate service switch is recommended.

Aseparate service switch is necessary if the circuit breaker is

in a location where accessing it would require getting close

to the furnace, or if the furnace is located between the main

electrical panel and the entry to the furnace room. The

furnace switch (service switch) should be clearly labeled and

installed in a location where it is not likely to be mistaken as

being a light switch or similar control.

Furnace Connection

120V:The furnace is shipped fully wired except for the

connections to the house wiring. The furnace power

connections are made in a junction box inside the blower

compartment. The junction box is factory installed on the

left hand side; however, it may be moved to the right hand

side. The junction box contains a BLACK wire to be

connected with L1 (hot), a WHITE wire to be connected with

L2, the Neutral, and a GREEN wire to be connected to the

ground.

USE COPPER CONDUCTORS ONLY

IMPORTANT

L1 (hot) and L2 (Neutral) polarity must be observed

when making field connections to the furnace. The

ignition control may not sense flame if L1 and L2 are

reversed. The ground is also essential.

IMPORTANT

The furnace shall be installed so the electrical

components are protected from water.

IMPORTANT

amps; see figure on next page.

mounted to the blower assembly; see Figure 15 on page 37.

THERMOSTAT

COOLING

CONTACTOR

FAN

RELAY

HEATING RELAY

24V

115V

ISOLATION RELAY

THERMOSTAT LOCATION

The thermostat should be located approximately 5 feet above

the floor, on an inside wall where there is good natural air

circulation, and where the thermostat will be exposed to

average room temperatures. Avoid locations where the

thermostat will be exposed to cold drafts, heat from nearby

lamps or appliances, exposure to sunlight, heat from inside

wall stacks, etc.

THERMOSTAT HEAT ANTICIPATOR SETTING: 0.45 AMP (White-

accessories such as electronic air cleaners and power

humidifiers.

ELECTRICAL WIRING AND COMPONENTS MUST BE PROTECTED

FROM MOISTURE, INCLUDING WATER AND CONDENSATE.

DEHUMIDIFICATION OPTION

The controller has a dehumidification option. When high

humidity is sensed (requires a 24 volt Humidistat that opens on

high humidity) the air flow is reduced to increase condensing.

Toactivate, the jumper labeled “DEHUM” must be moved to

the “yes” position.

AIRFLOW

WARNING

Make adjustments to the controller with the electrical

power off.

WARNING

ALL CONTROLLER JUMPER CHANGES MUST BE MADE

WITH POWER DISCONNECTED TO THE FURNACE.

The ECM TM blower is preprogrammed from the factory to

hold constant flow. (Replacement motors must have the

correct part number and can only be ordered from the furnace

size A/C tonnage as well as an adjustment in flow. Changing

the Heating Tap changes the Temperature Rise in about 5 F

If the Adjust Tap is used for cooling then the heating speed

should be adjusted to counter the effects of the adjustment

tap. Rule of thumb: The Heating Tap will be the same as the

START UP PROCEDURES

This furnace is equipped with a hot surface ignition (HSI)

device. Each time that the room thermostat calls for heat,

the HSI lights the main burners directly.See the lighting

instructions on the furnace.

ToStart The Furnace:

1. Remove the burner compartment access door.

2. Shut off the electrical power to the furnace and set the

room thermostat to its lowest setting.

3. Ensure that the ignition system control switch on the

gas valve is in the “ON” position.

4. Replace the burner compartment access door.

5. Restore electrical power to the furnace.

6. Set the room thermostat to a point above room

temperature to light the furnace.

7. After the burners are lit, set the room thermostat to the

desired temperature.

To Shut Down The Furnace:

1. Set the room thermostat to its lowest setting.

2. Remove the burner compartment access door.

3. The ignition system control switch on the gas valve may

be switched to the “OFF” position.

4. The furnace appliance shutoff valve may be closed if

desired.

SHOULD OVER HEATING OCCUR, OR THE GAS BURNERS

FAIL TO SHUT OFF, CLOSE THE MANUAL GAS VALVE FOR

POWER TO THE FURNACE. FAILURE TO DO SO CAN

CAUSE AN EXPLOSION OR FIRE RESULTING IN PROPERTY

DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.

WARNINGi

THE FURNACE BEFORE SHUTTING OFF THE ELECTRICAL

Sequence of Operation

1. Room temperature drops causing the room thermostat

heating W1 contacts to close.

2. The inducer blower is energized at high speed and the

control waits for the low pressure switch contacts to

close.

3. Once the low pressure switch contacts close, a 15-

second pre-purge is initiated. Then the inducer

powered.

heats up; 10 seconds on a first try, maximum 14 seconds

on a subsequent retry.

and cooling speed. Heating Tap A is factory set for heating speed.

increments. The Taps are in a row of jumper labeled “COOL”,

“HEAT” and “ADJUST”.

“ADJUST” Tap.

Rodgers) See page 39 for information on connecting optional

Table on page 36 shows the recommended taps for heating

manufacturer.) Changing the Taps allow adjustment for various

changes to low speed and the 120VAC ignitor is

4. After the prepurge period, the hot surface ignitor

6. The circulating fan begins 30 seconds after flame is

sensed.

7. Furnace continues to run in this state until a call for

second stage heat (W1 and W2) after a call for first

stage heat will energize the inducer at high speed and

the circulator high heat. The second stage pressure

switch contacts will close and energize the second

stage gas valve (high fire).

8. When the second stage of the thermostat is satisfied,

the inducer motor is reduced to low speed and the

second stage gas valve is de-energized. When the first

stage of the thermostat is satisfied, the first stage gas

valve is de-energized and the HEATdelay-to-fan-off

begins timing.

With the thermostat heating contacts open, the burner

flames extinguish immediately, the induced blower

stops after a 5 second postpurge period. The pressure

switch contacts open.

9. The circulating fan continues to run until timed out,

depending on the program settings.

Sequence if the furnace does not light up or

detect flame:

1. If flame is not detected during the trial-for-ignition

period, the gas valve is de-energized, the ignitor is

turned off, and the control goes into the "retry"

sequence.

The "retry" sequence provides a 30-second wait with

the inducer interpurge following an unsuccessful

ignition attempt (flame not detected). After this wait,

the ignition attempt is restarted. Two retries will be

attempted before the control goes into system lockout.

If the flame is established for more than ten seconds

after ignition, the controller will clear the ignition

attempt (or retry) counter. If flame is lost after 10

seconds, the control will restart the ignition sequence.

shorted or open condition in the flame probe circuit

will be sensed within 2 seconds. The gas valve will

de-energize and the control will restart the ignition

sequence. Recycles will begin and the burner will

operate normally if the gas supply returns, of the fault

condition is corrected, before the last ignition attempt.

Otherwise, the control will go into system lockout.

If the control has gone into system lockout, it may be

possible to reset the control by a momentary power

interruption of 10 seconds or longer.

Room temperature drops causing the room thermostat

heating contacts to close.

2. If pressure switch contacts are closed; and have failed

to open since the last cycle, all subsequent steps will

fail to occur.

3. The induced blower begins a prepurge cycle of 15

seconds.

Amomentary loss of gas supply, flame blowout, or a

4. The pressure switch contacts close. The pressure switch

contacts must close within 30 seconds. If they fail to do

so, the induced blower will shut offfor a five minute

period, then the sequence will begin again at Step 2.

regulator more than ± 0.30 inches water column.

magnehelic gauge. Do not adjust the gas valve pressure

carried out with the use of a manometer or calibrated

Any adjustments to the burner manifold pressure should be

during the test.

all gas fired appliances other than the furnace are off

If using a gas meter to check the furnace input, be sure that

supplier for specific gas heating content values.

Setting the Gas Pressure section, and contact the fuel

also to

.c. specification to bring the input into compliance. Refer

reduced .3” w.c. to 3.4’ w.c. which is within the ±0.30 inches

,the burner manifold pressure can be

is 1100 BTU/ ft

In the previous example where the heating value of the gas

pressure or by changing the burner orifice size.

be made by minor adjustments to the burner manifold

problem; however, adjustments to compensate for this can

approximately 103% of the rated input. This is not usually a

heating value will increase the input to

with a 1100 BTU/ ft

will reduce the input to 93% of the rated input. Natural gas

heating value

For example, natural gas with a 1000 BTU/ ft

actual furnace input and output will vary accordingly.

Since heating values for the gas vary geographically,the

gas with a specific gravity of 0.60

•The input rating of the furnace is based on 1075 BTU/ ft

for high fire input, 1.8 inches for low fire input

• The burner manifold pressure is normally set to 3.5 inches

10.5 inches w.c. and minimum of 5 inches w.c.

•The natural gas supply pressure should be a maximum of

Checking Furnace Input

manual.

Additional information is available in the

retry.

5seconds on a first try, 10 seconds on a subsequent

contacts have closed, the hot surface igniter heats up;

5. After the prepurge period, and after pressure switch

(See next page for formula.)

Troubleshooting section that starts on page 38 of this

meter test dial is:

Where:

Input is expressed in BTU/Hr.

Heating value of the gas is expressed in BTU/ ft3

Time means time required for the test dial to indicate 1 ft3/sec.

Ifusing a gas meter with SI (metric) units:

1ft3=0.0283 m3

1 m3=35.315 ft3

0.01 m3=0.3531 ft3

0.5 m3=1.766 ft3

TABLE 7: INPUT VALUES

HEATING VALUE OF NATURAL GAS in BTU / FT_

00 950 1000 1050 1100

860 44,186 46,512 48,837 51,163

605 61,860 65,116 68,372 71,628

,023 119,302 125,581 131,860 138,140

Heating Value of Gas X 3000

Input =

Bonnet Output

1.085 x T

Airflow (CFM) =

IMPORTANT: NEVER ADJUST THE INPUT OF THE FURNACE

TO EXCEED THE INPUT SHOWN ON THE RATING PLATE.

when the furnace is operating with both stages of heat

on. If a higher temperature rise is desired, refer to the dip

switch settings for “Heating”. This can be adjusted to

Nominal-Plus to reduce the air temperature rise or

Nominal-minus to increase the air temperature rise.

AIRFLOW

For proper furnace operation, airflow over the heat

exchanger is of utmost importance. Insufficient airflow

accelerates metal fatigue and failure in the heat exchanger

and excessive airflow promotes accelerated corrosion of the

heat exchanger.

IMPORTANT: Do not bypass this step of the start up

procedures.

Calculating Airflow

There are circumstances where it may be desirable to

know the airflow delivery through the duct system, such as

when estimating the amount of airflow available for air

conditioning. This can be done by direct measurement

with electronic or sloped manometers and velometers, or

by using the formula below.

Circulating Air Blower And Temperature Rise Check

variable speed circulation air blower motor that will supply

aconstant airflow when operated within the external stat-

ic pressure limits of the unit. One of the benefits of a vari-

able speed circulation air blower is soft starting and stop-

ping. The motor will ramp up to normal operating speed

gradually. This will minimize noise and increase comfort by

eliminating the initial blasts of cooler air encountered with

constant speed motors. At the end of a heating or cooling

cycle, the variable speed motor will slowly ramp down

after the blower off delay timer expires. If the fan is set to

operate as a continuous blower, the motor will slowly ramp

down to the airflow set for that mode.

Temperature Rise Check

When the duct system is complete and the air filters are in

place, determine the air temperature rise of the furnace.

Insert a duct thermometer in the supply air duct. The ther-

mometer should be placed as close as practical to the fur-

nace, but out of the “line of sight” of the heat exchanger

so to prevent a false reading due to radiated heat. Ensure

that the thermometer is within the duct air-stream. Avoid

locations such as the inside radius of an elbow,etc.

Insert a duct thermometer into the return duct as close to

the furnace as possible. Ensure that the thermometer loca-

tion will be unaffected by humidifier bypass ducts, etc.

Choose a location that ensures the thermometer will be

within the air-stream of the duct. Operate the furnace long

enough to obtain a steady state condition.

When the two thermometers have stabilized, compare the

two readings. Subtract the return air duct temperature

from the supply air duct temperature. This difference is

the temperature rise.

TABLE 7: INPUT VALUES

HEATING VALUE OF NATURAL GAS in BTU / FT_

MODEL

INTERVALTO

CONSUME 1 FT_

(SECONDS) 900 950 1000 1050 1100

GTM050C 72 41,860 44,186 46,512 48,837 51,163

GTM070C 51 58,605 61,860 65,116 68,372 71,628

GTM135C 27 113,023 119,302 125,581 131,860 138,140

Heating Value of Gas X 3000

Time in Sec. or 1 cu. ft.

Input =

Bonnet Output

1.085 x T

Airflow (CFM) =

Where:

CFM is airflow in cubic feet per minute

∆Tis the temperature rise

Bonnet output is the furnace output capacity from the

rating plate.

NOTE: The bonnet output will vary directly with the input.

If the actual input is below the stated input, the output will

be reduced in the same ratio.

Adjusting Dip Switches

If the blower speeds require adjusting, follow these steps:

1. Remove the blower compartment door.

switches/jumpers and select the appropriate settings

3. DIP switches or jumpers are found on the integrated

furnace control board.

NOTE: some integrated furnace controls are equipped

with jumpers for blower adjustments. Please reference

“Letter” on adjustment table and control board when

making adjustment.

4. Re-install the blower compartment door.

5. Upon completion, recheck the furnace temperature rise

to ensure that the desired condition exists.

WARNING

DISCONNECT THE ELECTRICAL SUPPLY TO THE FURNACE

BEFORE ATTEMPTING TO CHANGE THE BLOWER SPEED.

FAILURE TO DO SO COULD RESULT IN ELECTRICAL SHOCK

RESULTING IN PERSONAL INJURY OR LOSS OF LIFE.

2. Refer to the tables next page for adjusting DIP

The FV95A series 2-stage gas furnace is supplied with a

The formula for determining the furnace input via the gas Atemperature rise within 35-65 degrees F is acceptable

ime in Sec. for 1 cu. ft.

Rating Plate

Input BTU/hr

Rating Plate

Input BTU/hr

Switch

Description

Cool

Jumper

AC Tonnage Rise

Heating

Jumper

54,000

72,000

90,000

108,000

54,000

72,000

90,000

108,000

DIP Switch Configurations

To obtain the correct airflow for the cooling mode, please refer to the table above.

Note the position of the delay tap.

It is recommended that the heating airflow be set for the Nominal-Plus setting when the furnace is

matched for this cooling capacity.

Furnace is set at the factory for maximum cooling capacity and DIP switches must be field configured

to match the cooling system.

3.0

2.5

2.0

1.5

2.5

2.0

1.5

1.0

Cool

3.0

2.0

2.5

1.5

Cool

5.0

3.5

2.5

1.5

4.0

3.0

2.0

1.0

Cool

5.0

3.5

2.5

1.5

4.0

3.0

2.0

1.0

Cool

ADJUST ADJUST

(NORM) ( - )

3.5 3.0

1.0 1.0

70-4 Cool

Cool

1150

1On

1000

2Off

810

1Off

650

2.5 B

2On

1On 2C

2On

1On 1.5 D

1550 4

1350

1150

3.5

1000

810

2.5

Off

S385-4

All Delay

5Off

6On

5On

6On

5On

delay

Off

6On

180

Off

Model

Desc. Bank Switch Pos.

CFM AC

Ton

Tap

1 Off 1350 3.5

2 Off

1150

1On 3

2Off

810

1Off

2On

1On

Switch

ADJUSTING BLOWER SPEEDS

Cooling Mode

The unit is factory set to provide the highest airflow.

Adjustments can be made to match the furnace with a small-

er cooling coil by changing the DIP switch or jumper settings,

located on the integrated ignition control board. Refer to

Heating Mode

The unit is set from the factory to operate at the center of

the temperature rise range. For this model furnace, the air

airflow can be increased or decreased by changing the

heating mode DIP switches or jumpers, located on the inte-

grated ignition control board, to the Nominal-plus/minus

settings. Please note that Nominal-plus will decrease the

air temperature rise and the Nominal-minus will increase

the air temperature rise. At the end of a call for heat, the

main blower has a fixed off delay at a reduced airflow to

remove residual heat from the heat exchanger.

the Cooling DIP switch or jumper settings table for instructions

on how to set the switches. Please note that if the furnace is

to be matched to the lowest airflow for cooling, the "Adjust"

DIP switches or jumper setting must be set to the decreased

setting. When using this setting, it is recommended that the

Plus.

temperature rise is between 35 and 65 degrees F. Heating

Make adjustments to the controller with the electrical

power off.

WARNING

front blower shroud from furnace.

How To Remove The Blower

1. Disconnect power from furnace.

2. Remove thermostat wiring from the integrated furnace

control.

3. Remove L1, Neutral and Ground connections between

the integrated furnace control and the Furnace

electrical connection junction box.

4. Remove 12 pin male molex connector from female

connection point, and ground connection from

integrated furnace control.

5. Unscrew 2 blower housing bolts located in the front

6. Slide blower assembly towards front of furnace. Blower

is mounted on rail system, and will slide forward about

10 inches before blower is clear of rails.

6. Turn on power to the furnace.

integrated furnace control.

connection point, and ground connection to the

5. Connect 12 pin male molex connector to female

electrical connection junction box.

the integrated furnace control and the furnace

4. Connect L1, Neutral and Ground connections between

control.

3. Connect thermostat wiring to the integrated furnace

tighten.

blower housing. Insert blower housing bolts and

blower rails. Insert blower shroud on the front of the

urnace ensuring blower assembly is correctly placed in

blower rails. Push blower assembly towards back of

compartment. Line up blower assembly to slide into

2. Keep blower assembly tight to top of blower

1. Place blower into blower compartment.

How To Install The Blower

Ensure that there is a drip bend in the connect wires to

the blower motor to prevent condensate from following

the wire into the connector.

WARNING

Bolts

BLOWER BOLTS

FIGURE 15

blower shroud as indicated in figure 15 (right). Remove

Heating DIP switches or jumper setting be set for Nominal-

DO NOT OPERATE THE FURNACE WITHOUT AN AIR FILTER.

HOLES IN THE EXHAUST PIPING OR FURNACE HEAT

EXCHANGER CAN ALLOW TOXIC FUMES TO ENTER THE

HOME AND CIRCULATE THROUGH THE DUCT SYSTEM

RESULTING IN CARBON MONOXIDE POISONING OR

DEATH. IF LEAKS ARE FOUND IN THE FURNACE HEAT

EXCHANGER, IT MUST BE REPLACED.

Air Filter

The filter should be inspected frequently and cleaned as

necessary. We recommend a monthly inspection at first,

perhaps coinciding with the arrival of the monthly fuel bill

as a reminder. The frequency may be increased or decreased

depending on experience and conditions.

Lubrication

Both the induced draft blower motor and circulating fan

motor are ball bearing type motors. Neither requires

routine lubrication.

Operating Tips

1. Clean air filters maximize efficiency and reduce

heating costs.

2. During the heating season, keep windows and doors

closed to reduce the heating load on the system.

3. Avoid excessive use of kitchen exhaust hoods and other

exhaust fans to reduce the heating load on the system.

4. Arrange the furniture and drapes so that the supply air

registers and return air grilles are unobstructed.

5. If you have a perimeter duct system, ideally, the warm

air should bathe the cold exterior walls. Avoid the use

of plastic deflectors on the supply air registers that

tend to short circuit the warm air straight into the

return air grilles. These deflectors are often the cause

of cool draughts across the floor.

TABLE 8

5On

6On

5On

Off

6On

180

Off

The motor bearings were prelubricated by the motor

manufacturer. Do not attempt to lubricate them. Excess

lubrication will void the warranty, shorten the service

life of the motors, and will attract the buildup of dust

and dirt.

The induced blower motor and circulating fan motor must

be cleaned on a periodic basis by a qualified service

technician. Dust buildup in the ventilation ports of the motor

will cause the motor to not dissipate heat properly resulting

in reduced service life.

Vent Connector

The exhaust venting between the furnace vent box and

chimney should be inspected periodically for sags, pitting,

evidence of leakage etc. If any of these conditions exist,

contact your installation contractor,service agency or fuel

supplier.

DISCONNECT THE ELECTRICAL POWER SUPPLYTO THE

FURNACE BEFORE ATTEMPTING ANY MAINTENANCE.

FAILURE TO DO SO CAN CAUSE ELECTRICAL SHOCK

RESULTING IN PERSONAL INJURY OR LOSS OF LIFE.

MAINTENANCE

This is a critical connection. Small amounts of corrosion

can significantly increase the internal resistance of the

connection. A relatively small increase in resistance can

result in a large decrease in flame signal.

Induced Blower

The induced blower motor should be inspected and cleaned

if necessary. Clear any dust buildup from the ventilation

ports.

Circulating Fan

The condition of the circulating fan should be checked to

ensure that it is free of excessive dust buildup, debris, etc.

The mechanical fasteners should be inspected and checked

for proper tightness and parts alignment. The motor

ventilation ports should be cleaned if necessary to prevent

restriction to cooling by air over the motor.

BE CAREFUL WHEN WORKING ON THE BURNER

ASSEMBLY. THE HOT SURFACE IGNITER IS FRAGILE AND

CAN BREAK EASILY.

The flame sensor should be inspected and cleaned with fine

steel wool or Scotch-Brite™ scrubbing pad. The wiring

connection should be checked to ensure that it is tight and

corrosion free.

6. Avoid placing heat producing appliances such as

televisions, radios, lamps, etc. in a location to influence

the thermostat.

7. Keep combustible articles at least 3 feet away from the

furnace. Do not block access for servicing the furnace.

Do not use the vent connector as a hanger for clothes

or anything else.

8. Never attempt to operate the furnace without the

blower door in place.

ANNUAL INSPECTION / SERVICE

Aqualified installation contractor, service agency or fuel

supplier must inspect the furnace annually.

Your annual inspection will normally cover the following:

Heat Exchanger

The heat exchanger should be inspected for corrosion. The

flue passages (heat exchanger tubes) should be free of scale

or excessive corrosion. Observe the burner flames. If there

appears to be flame distortion, check venting for blockage.

Also check for signs of inadequate combustion air supply. If

flame distortion continues after eliminating the blockage in

the venting as the cause, it may be necessary to replace the

tubular heat exchanger. The tubular heat exchanger cannot

be field cleaned. If the tubular heat exchanger is blocked by

soot or excess scale, replace it. Check NOX baffles (installed

in heat exchanger tubes) for any distortion. If distorted,

replace NOX baffles.

Burners

The burners should be inspected to ensure that they are free

of deterioration, dust and debris, and properly aligned with

the heat exchanger. In most cases, a simple vacuuming with

abrush attachment will adequately clean the burner

assembly and burner compartment.

WARNING

CAUTION

WARNING

CAUTION

IMPORTANT

DISCONNECT THE ELECTRICAL POWER SUPPLY TO THE

FURNACE BEFORE ATTEMPTING THIS MAINTENANCE

PROCEDURE. FAILURE TO DO SO CAN CAUSE

ELECTRICAL SHOCK RESULTING IN PERSONAL INJURY OR

LOSS OF LIFE.

All electrical connections should be examined to ensure that

they are tight and corrosion free. Repair any connections

that have become loose or corroded.

Furnace Operation

The furnace should be cycled during the annual inspection

and servicing to:

1. Test all safety related controls.

2. Determine that the temperature rise falls within the

range shown on the appliance rating plate.

3. Ensure that the burner ignition is smooth and that the

flames are smooth soft blue, and not impinging on the

heat exchanger.

Label all wires prior to disconnection when servicing

controls. Wiring errors can cause improper and

dangerous operation.

Always verify proper operation after servicing.

FIELD SUPPLIED AND INSTALLED OPTIONAL

ACCESSORIES

Electronic Air Cleaner

The integrated furnace control has provisions to supply

power and control an electronic air cleaner rated at 120vac,

1.0 amp max.

Line voltage for an electronic air cleaner may be picked up

from the "EAC-N". 120 volt power will be available at these

terminals whenever the circulating fan is operating in the

heating or cooling modes.

The integrated furnace control has provisions to supply

power and to control a line voltage humidifier or the

primary of a 120 / 24 volt humidifier step down transformer,

rated at 120vac, 1.0 amp max.

Line voltage for a humidifier may be picked up from the

"HUM-H" terminal and from the "HUM-N" terminal. 120

volt power will be available at these terminals whenever

the circulating fan is operating in the heating mode.

Electrical

ALL WIRING INSIDE THE FURNACE MUST HAVE A

MINIMUM TEMPERATURE RATING OF 105C.

All HUM (humidifier) and EAC (electronic air cleaner)

terminals are 120v.Do not directly connect 24v

equipment to them.

IMPORTANT

All furnace and furnace accessory wiring shall conform

to the temperature limitations of 63°F (35°C) rise.

IMPORTANT

WARNING

CAUTION

WARNING

heat and make a retrial for high every 5 or 10 minutes.

switch does not pull in the controller will continue in low

finished) and during the trial for ignition the high pressure

If there is a demand for high heat (low heat firing period is

The fourth scenario:

heat.

the gas low the flame noise sounds deceptively like high

heat should free it. Note: When the inducer is in high and

gas valve to low.If there is ice in the vent the continuous

period, the high pressure switch makes, the gas valve will

long as the low pressure switch is made). If, during this

switch, the unit will stay in low heat and high inducer (as

the next trial for high fails to make the high pressure

If the low heat fails after the warm-up period, and when

The third scenario;

for pressure switch failed to close.

exchanger drain tube the furnace will cycle and flash code

the igniter or gas on. If there is an air trap in the heat

voltage. If there is a blocked drain the furnace will not turn

acombination of high wind and long vent length and low

the failure of the low heat is temporary and may be due to

then after the warm-up period go to high heat. Most likely

controller will wait 3 minutes before ignition retrial and

If the low heat fails after the warm-up period, the

The second scenario;

inducer until the high pressure switch makes.

fails to make, the furnace will run in low gas and high

demand for heat is high and the high heat pressure switch

asingle stage thermostat, or with a two stage T-stat the

•if, after the warm-up period and the low heat period with

Scenario one:

to supply heat in one of three alternate firing scenarios.

before high heat. If there is a problem with high or low

thermostat option, there is a selectable low heat period

or inducer to heat demand. With the single stage

and after a 60 second warm-up period adjusts either the gas

inducer (only the low pressure switch is required to make)

The controller ignites the furnace in low heat and high

Troubleshooting

will aid in trouble shooting.

Page 41, Table 9, Page 42, Table 10 and Figure (trouble shooting)

eat the UTEC 1170-25 controller will attempt to continue

Humidifiers/ Electronic Air Cleaners switch to high. A loss of high pressure switch will force the

LED FLASH(ES)

Green Off

1Red

2Red

3Red

4Red

5Red

6Red

7Red

8Red

9Red

10 Red

Internal controller or Room Air Fan failure.

DO NOT operate on heat until Fan failure cleared.

Roll-out open. Cycle power to reset.

Flame sensed with gas valve de-energized.

Pressure switch(es) remains open. Combustion

Blower cycles until low pressure switch closes. If

running, high pressure switch is open.

Pressure switch(es) remains closed. Combustion

Blower will not operate until switch(es) opened.

Open high room air limit switch.

Room Air Fan failed or rollout switch(es) open.

System lockout reset by recycling power.

Caution: Do not run on heat until fan operational.

115 Volt AC power reversed or improper ground.

Low flame sense signal. 1 hour lockout.

Too many high air temperature limit trips. 1 hour

lockout.

Too many low pressure switch trips after ignition. 1

hour lockout

1hour lockout. Reset by cycling power or

thermostat.

CHECK and REPAIR

1. Replace Integrated Furnace Control.

2.Rollouts or Fan failure– see 5 Red

Flashes.

1.Pressure switch failure.

2. Pressure switch tubing, and wiring.

3. Obstructions in air intake or exhaust

flue system that prevent proper

combustion air flow.

1. Pressure switch(es) failure.

jumpered.

Dirty filter or room air vents closed.

1. Wiring in good condition and securely

connected. Drip leg at Motor

connector.

2. Check Room Air Fan by running A/C or

Fan (not heat).

3. Blockage in heat exchanger or venting.

Line voltage polarity,and earth ground.

1. Flame at burner.

2. Dirty or cracked flame sensor.

See 4 Red Flashes

See 2 Red Flashes.

1. Gas supply off or at too low pressure.

2. Smell gas? Igniter failure.

3. Earth grounded.

TABLE 9

NDICATES (FEDDERS UTEC 1170-25 CONTROLLER)

Mis-wiring is probable cause.

2. Pressure switch(es) mis-wired or

IF AND CHECK or REPAIR

Induced blower does

not energize

3Flash code does not come on 1. Induced blower wiring.

2. Induced blower.

Induced blower does

not energize

3Flash code does come on 1. Pressure switch stuck closed.

2. Pressure switch is mis-wired or jumpered.

Induced blower is

energized

2Flash code does not come o n Wait for the pre-purge to expire.

2Flash code

comes on

Induced blower turns off 1. Pressure switch stuck in the open position.

2. Pressure switch, tubing and wiring.

3. Obstruction in furnace venting that is preventing proper combustion airflow.

Pre-purge time h as

expired

HSI element does not glow r ed

within 10 seconds.

1. Broken or damaged HSI element.

2. Broken or damaged HSI element leadwires.

HSI element i s glow-

ing red.

No other visible control system

action Wait for HSI element warm up time to expire.

HSI element warm u p

time has expired a nd

main valve has been

energized.

Main valve does not light within

trial for ignition period

1. Induced blower moving main burner gas away from the HSI element.

2. Inlet gas pressure too low for main burner ignition.

3. Input line voltage too low to heat HSI element.

4. HSI element incorrectly positioned.

5. Clogged or incorrect main burner orifice.

Main burner lights

within trial for ignition

period.

Main valve i s de-energized a t the

end of the trial for ignition period.

If main flame i s not sensed during

trial for ignition, system will shut o ff

HSI element and main gas flow,

then g o through another purge

period and initiate another ignition

trial. A total o f 4ignition trials will

be attempted before the system

goes into lockout.

1. Line voltage to L1 terminal of integrated furnace control must be

120 volts with reference to furncace chassis.

2. Furnace must be reliably connected to earth ground.

3. Induced blower moving main burner flame away from the flame sensor rod.

4. Inlet gas pressure too low for proper flame sensing.

5. Flame sensor rod contaminated or in incorrect position.

Main burner stays o n

after the end of t he

trial for ignition p e-

riod.

Circulating fan is not turned on after

30-second time delay.

1. Wiring between system control and integrated furnace control.

Proper operation of integrated furnace control.

Main burner goes o ut

before thermostat call

for heat ends.

4 Flash code comes on

Open high limit switch.

High limit wiring in good condition and securely connected.

Main burner goes o ut

before thermostat call

for heat ends.

4 Flash code does not come on

Green LED off

1. Induced blower moving main burner flame away from flame sensor rod.

Pressure switch has opened.

Open flame rollout switch

Rollout switch wiring in good condition

Broken or damaged blower

Flame sensor rod ceramic or leadwire overheated.

Gas supply / flow reduced or interrupted.

5Flash code comes

on.

TABLE 10 : GENERAL TROUBLESHOOTING INTEGRATED FAN CONTROL

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FURNACE COMPONENTS . . . . . . . . . . . . . . . . . .1

REGULATOR VENT . . . . . . . . . . . . . . . . . . . . . . .1

GENERAL SAFETY RULES . . . . . . . . . . . . . . . . . .1

FURNACE OPERATION INFORMATION

TO START THE FURNACE . . . . . . . . . . . . . .2

FURNACE SHUTDOWN PROCEDURE . . . . .2

MAINTENANCE

REPLACING AIR FILTER . . . . . . . . . . . . . . . .3

LUBRICATION . . . . . . . . . . . . . . . . . . . . . . .3

ROUTINE EXAMINATION . . . . . . . . . . . . . .3

FURNACE APPEARANCE . . . . . . . . . . . . . . .4

CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . .3

SEQUENCE OF OPERATION . . . . . . . . . . . . . . . .4

READ THESE INSTRUCTIONS THOROUGHLYBEFORE

ATTEMPTING TO OPERATE THIS FURNACE.

This furnace has been designed to deliver many years of

efficient, dependable service. With regular

maintenance, some of which requires the attention of

aqualified installer,service agency or gas supplier,

some of which you may do yourself, the furnace will

operate satisfactorily over many heating seasons.

Please read this manual to familiarize yourself with

safety procedures, operation, and routine maintenance

procedures.

WHATTO DO IF YOU SMELL GAS:

•DO NOT TRY TO LIGHT ANY APPLIANCE

•DO NOT TOUCH ANY ELECTRICAL SWITCH; DO NOT

USE ANY PHONE IN YOUR BUILDING

•LEAVE THE BUILDING IMMEDIATELY

•IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A

PHONE OUTSIDE THE BUILDING. FOLLOW THE GAS

SUPPLIER’S INSTRUCTIONS

•IF YOU CANNOT REACH YOUR GAS SUPPLIER, CALL

THE FIRE DEPARTMENT

•INSTALLATION AND SERVICE MUST BE PERFORMED BY

AQUALIFIED INSTALLER, SERVICE AGENCY OR THE

GAS SUPPLIER

DO NOT USE THIS FURNACE IF ANY PARTHAS BEEN

UNDER WATER. A FLOOD DAMAGED FURNACE IS

EXTREMELY DANGEROUS. ATTEMPTS TO USE THE

FURNACE CAN RESULT IN FIRE OR EXPLOSION. A

QUALIFIED SERVICE AGENCY SHOULD BE CONTACTED

TO INSPECT THE FURNACE AND TO REPLACE ALL GAS

CONTROLS, CONTROL SYSTEM PARTS, ELECTRICAL PARTS

THAT HAVE BEEN WET OR THE FURNACE IF DEEMED

NECESSARY

FIRE OR EXPLOSION HAZARD

DO NOT STORE OR USE GASOLINE OR OTHER

FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF

THIS OR ANY OTHER APPLIANCE.

FAILURE TO FOLLOW SAFETY WARNINGS EXACTLY

COULD RESULTIN SERIOUS INJURY

,DEATH, OR

PROPERTY DAMAGE.

TABLE OF CONTENTS

User’s Information Manual

WARNING

FURNACE COMPONENTS

REGULATOR VENT

Most natural gas systems and all LP gas systems have a

service regulator located near the point where the gas

piping enters the building. The propane tank will normally

have an additional first stage regulator located at the tank

outlet valve. All of these regulators (located outdoors) will

have a vent; see Fig. 2 (below).

It is important for these vents to remain clear. Do not allow

moisture, which could freeze, to build up in the vent. If you

see moisture building up in the regulator vent, contact your

gas supplier.

Your gas supplier should periodically inspect and clean the

air vent screen to prevent any obstruction. Keep the

protective regulator cover in place, as exposure to the

elements can cause ice buildup and a regulator failure.

WARNING

AN OBSTRUCED AIR VENT ON AN LP (PROPANE)

CYLINDER OR TANK REGULATOR CAN CAUSE EXPLOSION

OR FIRE RESULTING IN PROPERTY DAMAGE, SEVERE

PERSONAL INJURY OR DEATH.

FIGURE 2

GAS REGULATOR VENT

FIGURE 1

FURNACE COMPONENTS

Regulator vent

Keep free of ice, snow,

and debris

GENERAL SAFETY RULES

1. Combustible materials should not be stored against or

around the furnace. Keep the furnace area clear and

free from all combustible materials such as newspapers,

rags, cardboard, clothing, etc. This applies especially to

gasoline and other flammable vapors and liquids.

2. A furnace needs adequate amounts of combustion and

ventilation air to operate properly. Do not block or

obstruct air openings on the furnace, or air openings

supplying combustion or ventilation air to the area

where the furnace is installed. There are many areas

from which your furnace could be receiving combustion

and ventilation air including from within the heated

area (inside air), from outdoors, from an attic or crawl

space. If renovations are done, be sure that air supply

openings are not inadvertently covered over with

insulation, vapor barrier, or similar construction

material.

3. All doors and panels must be in place during normal

furnace operation. Attempting to operate the furnace

with missing doors or panels could lead to the creation

of carbon monoxide gas.

4. If the furnace is installed in a confined space or if you

intend to build a furnace room where insulation is

present, be aware that some insulating materials are

combustible. Do not allow building insulating materials

to come into contact with the furnace.

5. Any additions, alterations or conversions required in

order for the furnace to properly match the application

requirements must be done by a qualified installation

contractor, service agency or gas supplier, using factory

specified or approved parts.

6. Familiarize yourself with the location of the furnace gas

manual shutoff valve and any electrical switches, fuse or

circuit breaker associated with the furnace.

7. For your protection, the furnace is equipped with

manually reset flame rollout switches. If either switch

trips frequently, do not ignore this, call your installation

contractor,service agency or gas supplier.

8. Should the gas supply fail to shut off or if overheating

occurs, shut offthe gas valve to the furnace before

shutting off the electrical supply.

9. Familiarize yourself with the location of your furnace

filter or filters. A blocked air filter will reduce efficiency,

increase fuel consumption, raise the furnace operating

temperature, and shorten the life of furnace

components.

10. Do not cover return air grilles and supply air registers

with drapes, curtains, throw rugs, etc.

11. Avoid shutting off supply air registers in the interests of

saving heat. The furnace requires a sufficient quantity

of air passing over the heat exchanger to operate

within design temperatures, (system temperature rise).

Reducing the availability of supply air registers may

have the unforeseen consequence of raising the

furnace operating temperature above design, thereby

reducing furnace efficiency, and shortening the life of

the furnace components.

Transformer

Blower

Junction Box

Door Switch

Igniter

Pressure Switch

Burners

Limit Switch

Rollout Switch

Induced blower

Gas valve

Flame Sensor

Control Panel

Furnace Control

WARNING

IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION,

SERVICE OR MAINTENANCE CAN CAUSE PROPERTY

DAMAGE, PERSONAL INJURY OR DEATH

FOR ASSISTANCE OR ADDITIONAL INFORMATION,

CONSULT A QUALIFIED INSTALLER, SERVICE AGENCY, OR

YOUR GAS SUPPLIER.

WARNING

DEVICES ATTACHED TO EITHER THE VENT OR

COMBUSTION AIR INTAKE FOR THE PURPOSES OF

EXCEEDING THE LIMITATIONS DESCRIBED IN THE

INSTALLATION MANUAL, INCLUDING FIELD INSTALLED

INDUCED BLOWER FANS HAVE NOT BEEN TESTED AND

ARE NOT INCLUDED IN THE DESIGN CERTIFICATION OF

THE FURNACE.

THE MANUFACTURER CANNOT AND WILL NOT

SPECULATE ON THE EFFECTS OF SUCH MODIFICATIONS,

AND CANNOT AND WILL NOT BE RESPONSIBLE FOR

INJURYOR DAMAGE CAUSED BY THE USE OF SUCH

UNTESTED AND/OR UNCERTIFIED DEVICES, ACCESSORIES

OR COMPONENTS.

FURNACE OPERATION INFORMATION

During the heating season, the operation of the furnace is

fully automatic.

ToStart The Furnace:

1.First read these instructions and safety notices

thoroughly.

2. Set the thermostat to the lowest setting.

3. Ensure that all supply air registers and return air grilles

are open.

4. Turn off the electric power to the furnace.

5.Remove the burner access door.

6. Ensure that the appliance manual shutoff valve is in the

"ON" position. The valve handle is normally in-line

with the gas pipe and valve body when it is in the "ON"

position perpendicular to the gas piping and valve

body when it is in the "OFF" position.

7. Wait 5 minutes to clear out any gas. If, after this time

you smell gas, STOP. Turn the appliance manual shutoff

valve to the "OFF" position. If burning propane or

other LP gas, smell for gas near the floor since propane

and butane are both heavier than air. If after this time

you do not smell gas, continue to the next step.

8. Gas valve: Ensure that the Gas Valve Control is in the

"ON" position, see Figure 3 at right.

9. Replace the burner access door, ensuring that it is

properly in place.

10. Restore the electric power to the furnace.

11. Adjust the thermostat to the desired setting. If the

thermostat also controls an air conditioning system,

ensure that the thermostat system switch is in the

"HEAT" or "AUTO" mode.

If this is the first time that the furnace has undergone a trial

ignition since installation, or if there has been work done

on the gas lines, the furnace might not light because of air

trapped in the gas supply line.

Simply turn the thermostat down to its lowest setting, wait

five minutes, then adjust the thermostat to the desired

setting. If the problem persists, proceed to the Furnace Shut

Down Procedure and call your installer, service agency or

gas supplier.

If you intend to be away from home for lengthy periods of

time during the non-heating season, it is advisable to follow

the furnace shut down procedure.

WARNING

NEVER USE TOOLS TO TURN A MANUAL GAS CONTROL

HANDLE. IF THE CONTROL HANDLE WILL NOT TURN BY

HAND, DO NOT ATTEMPT TO FORCE IT.DOING SO

COULD RESULT IN FIRE OR EXPLOSION RESULTING IN

SERIOUS PERSONAL INJURY OR DEATH, OR PROPERTY

DAMAGE. CALL A QUALIFIED INSTALLATION

CONTRACTOR, SERVICE AGENCY OR GAS SUPPLIER.

Furnace Shutdown Procedure

1. Set the thermostat to its lowest setting.

2. Shut off electric power to the furnace.

3. Turn the appliance manual shutoff valve to the "OFF"

position.

4. Remove the burner access door, move the manual gas

control switch to the "OFF" position, then reinstall the

burner access door.

Ifyou intend to be away from home for lengthy periods of

time during the nonheating season, it is advisable to follow

the furnace shutdown procedure.

FIGURE 3

GAS VALVE

Outlet Pressure

Post Set Screw

Vent

Inlet Pressure

Post Set Screw

On/Off Switch

Regulator

Adjustment

3Pin Connector

Regulator

Adjustment

CAUTION

THE FURNACE SHOULD BE OPERATED WITH ALL PANELS IN

PLACE. NEVER OPERATE THE FURNACE WITH THE BLOWER

DOOR REMOVED EXCEPT FOR SERVICE PURPOSES.

WARNING

ALWAYS DISCONNECT THE ELECTRICAL SUPPLY TO THE

FURNACE BEFORE REMOVING THE BURNER

COMPARTMENT ACCESS DOOR.

MAINTENANCE

Lubrication

Minimal lubrication is required for your furnace. The

induced blower assembly motors have sealed bearings. The

bearings contain permanent special purpose lubricants.

Attempting to force common oil into the induced blower

motor bearings will deteriorate the original lubricant and

shorten bearing life.

Routine Examination

It is good practice to give a quick inspection of your furnace

each time you inspect or clean the air filter. Things to check:

•All areas around the vent connector and chimney

should be clear and free of obstructions.

•Check the venting to ensure that it is still fastened to

the furnace. It should not sag and should have a slope

upwards to the chimney.It should be physically sound,

without holes or excessive corrosion.

•The return air duct connection must be sound and

securely fastened to the furnace casing. In most cases,

the filter rack provides the means to connect the return

air to the furnace. There should be no return air inlets

in the vicinity of the furnace.

•All ductwork should be secured to the furnace, and all

ductwork should be solidly supported throughout the

heating system.

WARNING

DISCONNECT THE ELECTRICAL POWER TO THE FURNACE

BEFORE ATTEMPTING ANY MAINTENANCE. FAILURE TO

DO SO MAY CAUSE ELECTRICAL SHOCK RESULTING IN

SEVERE PERSONAL INJURY OR DEATH.

Consult your installation contractor or service technician if

you have any questions on filters.

Replacing Air Filter

1. Disconnect electrical power to the furnace.

2. Pull the filter out the front.

3. Replace with a fresh filter and reconnect power to the

furnace. The filter will have an arrow indicating proper

airflow direction.

DONOT OPERATE YOUR FURNACE (OR AIR CONDITIONER)

WITHOUT AN AIR FILTER.

FIGURE 4

AIR FILTER

•The furnace should be well supported on a level floor or

by the means used to suspend the furnace in a horizontal

configuration. Base support should be physically sound

without sagging, cracks, gaps, etc. around the base so as

to provide a seal between the support and the base.

•Check the furnace for obvious signs of deterioration.

•The gas burner should be observed from time to time

during the heating season to ensure that the flames are

clean and blue. A bit of orange color in the flame is not

likely to be a problem and is probably dust particles

burning. If you observe lazy yellow flames, call your

heating or service contractor immediately. The yellow

flames inevitably lead to soot buildup.

Furnace Appearance

The furnace exterior finish is a durable automotive-like

coating. It may be washed with mild soap if necessary.

Galvanized metal surfaces require no maintenance.

Cleaning

It is advisable to keep dust buildup on warm surfaces to a

minimum, since dust, in some cases, can be combustible.

Dust buildup in the circulating fan can impair blower

performance; therefore, reduce efficiency.Because the

blower wheel is fastened directly to the blower motor, we

recommend that major cleaning be left to your service

contractor.

CAUTION

DO NOT PERMIT WATER OR CLEANING SOLUTIONS TO

ENTER THE ELECTRIC MOTOR.

WARNING

NEVER ATTEMPT TO CLEAN THE BURNER AREA WHILE THE

BURNERS ARE OPERATING. DOING SO MAY RESULT IN

EXPLOSION OR FIRE RESULTING IN SEVERE PERSONAL

INJURYOR DEATH.

The burner area should be inspected and cleaned

periodically.Be careful when cleaning around the burner

area. The hot surface igniter is fragile and will break easily.

Do not touch the hot surface igniter or flame rod.

Sequence Of Operation

1. Thermostat, responding to cool room, calls for heat.

2. Combustion air blower begins.

3.After 15 second prepurge, hot surface igniter warms up.

4. After approximately 5 seconds, the gas valve will open,

and the burners ignite.

5. Thirty seconds after the burners ignite and flame sense

is proven, the main blower starts on the heating speed.

6.System remains in this state until the room air

temperature rises causing the thermostat to terminate

its call for heat.

7. The gas valve shuts off; the burners extinguish.

8. After brief postpurge period, (5 seconds), the

combustion air fan stops. The main blower continues to

run. Elapsed time ranges from 60 seconds to 180

seconds, depending on the manufacturer’s requirement.

9. The furnace remains idle until the next call for heat.

Variations

If your system includes air conditioning, your thermostat

(supplied by the installer) will likely have two switches. The

first switch is the system switch. The switch settings usually

include HEAT, COOL, and OFF. Some thermostats have system

switches which include HEAT, COOL, AUTO, and OFF. The

system switch must be in the HEAT or AUTO position for the

furnace to run.

The second switch is the fan switch. It usually has settings of

ON and AUTO. The fan switch may be in either position

when using the furnace. If the fan switch is set to ON, the

main blower will run continuously,and the blower delays

mentioned in the sequence of operation points 5 and 9 will

be ignored.

The furnace achieves its mid-efficiency in two general areas.

First, there is no wasteful standing pilot. The furnace

consumes no gas in between cycles. Secondly, the furnace is

designed to allow very small amounts of excess air in the

combustion process. Older furnaces had heat exchangers

that were commonly 40% larger than necessary for

complete combustion. While this prevented the creation of

carbon monoxide, the heated excess air was expelled up the

chimney where it could not benefit the interior of the

home. Special safety controls now prevent the formation of

carbon monoxide.

IMPORTANT: Your furnace should be cleaned and

inspected annually by a trained and qualified service

technician.

Your service technician has the knowledge and test

equipment to determine the condition of your furnace.

WARNING

THE EXHAUST GASES FROM THIS FURNACE CONTAIN

CHEMICALS, WHICH ON SOME OCCASIONS MAY

INCLUDE CARBON MONOXIDE (CO). CARBON

MONOXIDE IS AN ODORLESS, TASTELESS, CLEAR

COLORLESS GAS, WHICH IS HIGHLYTOXIC. EVEN LOW

CONCENTRATIONS ARE SUSPECTED OF CAUSING BIRTH

DEFECTS AND OTHER REPRODUCTIVE HARM.

UL AND CUL RECOGNIZED CO DETECTORS ARE

RECOMMENDED FOR ALL BUILDINGS EQUIPPED WITH

FOSSIL FUEL BURNING APPLIANCES. ALL CO DETECTORS

SHOULD BE INSTALLED IN ACCORDANCE WITH THEIR

MANUFACTURER’S INSTRUCTIONS AND APPLICABLE

LOCAL BUILDING CODES.

Illustrations cover the general appearance of the units at the time of publication and the manufacturer reserves the right to

make changes in design and construction at any time without notice.

For replacement parts contact:

Airwell Fedders North America

2 Centre Drive, Monroe Township, NJ 08831

Phone: 1-800-332-6658

Fedders Fv95A072 Users Manual

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