York P*UR 140, P*UR 80, FG9-UP 40, FG9-UP 60, P*UR 60 Installation Instructions Manual

INSTALLATION
INSTRUCTION

CONTENTS

GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . 3

SPECIFIC UNIT INFORMATION . . . . . . . . . . . . . . . 4

UPFLOW MODELS . . . . . . . . . . . . . . . . . . . . . . . . . 8

DOWNFLOW / HORIZONTAL MODELS -

HORIZONTAL APPLICATION . . . . . . . . . . . . . . . . 11

GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

ELECTRICAL POWER CONNECTION . . . . . . . . . 13

ELECTRICAL CONTROL CONNECTIONS . . . . . . 14

HIGH EFFICIENCY

GAS-FIRED FURNACES TUBULAR

HEAT EXCHANGER SERIES

UPFLOW MODELS: P*UR / FG9-UP / G9T-UP

40 - 140 MBH INPUT

DOWNFLOW/HORIZONTAL MODELS: P*DH / FG9-DH / G9T-DH

40 - 120 MBH INPUT

COMBUSTION AIR AND VENT SYSTEM . . . . . . . 15

HORIZONTAL VENT APPLICATIONS . . . . . . . . . 24

CONDENSATE PIPING . . . . . . . . . . . . . . . . . . . . . 24

SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . 26

START-UP AND ADJUSTMENTS . . . . . . . . . . . . . 27

FURNACE ACCESSORIES . . . . . . . . . . . . . . . . . . 32

AIRFLOW DATA - UPFLOW . . . . . . . . . . . . . . . . . 33

AIRFLOW DATA - DOWNFLOW/HORIZONTAL . 33

OPERATION AND MAINTENANCE . . . . . . . . . . . 34

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 37

FURNACE CONTROL DIAGNOSTICS . . . . . . . . . 37

WIRING DIAGRAM - UPFLOW MODELS . . . . . . . 39

WIRING DIAGRAM - DOWNFLOW/HORIZONTAL 40

CAUTION: READ ALL SAFETY GUIDES BEFORE YOU

START TO INSTALL YOUR FURNACE.

SAVE THIS MANUAL

035-14370-000 REV A (899) Form 650.75-N4U

650.75-N4U 035-14370-000

TABLE OF CONTENTS

GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . 3

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

NOTES, CAUTIONS & WARNINGS . . . . . . . . . . . . . . . . 3

VENT SAFETY CHECK PROCEDURE . . . . . . . . . . . . . 3

SPECIFIC UNIT INFORMATION . . . . . . . . . . . . . . . . . . . . . 4

LIMITATIONS & LOCATION . . . . . . . . . . . . . . . . . . . . . .4

CLEARANCES FOR ACCESS . . . . . . . . . . . . . . . . . . . .4

CLEARANCES TO COMBUSTIBLES . . . . . . . . . . . . . . .5

BELOW FREEZING LOCATIONS . . . . . . . . . . . . . . . . . .5

DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

UPFLOW MODELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

SUPPLY PLENUM CONNECTION . . . . . . . . . . . . . . . . .8

RETURN DUCT CONNECTION . . . . . . . . . . . . . . . . . . . 9

UPFLOW FILTER INSTALLATION . . . . . . . . . . . . . . . . .9

I

NTERNAL INSTALLATION

S

IDE RETURN

B

OTTOM RETURN

- E

. . . . . . . . . . . . . . . . . . . . . . . . .9

XTERNAL FILTER

. . . . . . . . . . . . . . . . . 9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

DOWNFLOW/HORIZONTAL MODELS

DOWNFLOW APPLICATION . . . . . . . . . . . . . . . . . . . .10

DOWNFLOW FILTERS . . . . . . . . . . . . . . . . . . . . . . . . .10

SUPPLY AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . .11

DOWNFLOW / HORIZONTAL MODELS - HORIZONTAL

APPLICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

HORIZONTAL FILTERS. . . . . . . . . . . . . . . . . . . . . . . . 11

ATTIC INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . .11

CRAWL SPACE INSTALLATION . . . . . . . . . . . . . . . . .12

GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

ELECTRICAL POWER CONNECTION . . . . . . . . . . . . . . .13

ELECTRICAL CONTROL CONNECTIONS . . . . . . . . . . .14

COMBUSTION AIR AND VENT SYSTEM . . . . . . . . . . . . 15

METHOD ONE: TWO PIPE SEALED COMBUSTION AIR

& VENT SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

COMBUSTION AIR INTAKE/VENT CONNECTIONS 15

COMBUSTION AIR/VENT PIPE SIZING . . . . . . . . . . 16

VENT TERMINATION (2-PIPE). . . . . . . . . . . . . . . . . 16

VENT CLEARANCES (2-PIPE) U.S. ONLY . . . . . . . 17

VENTING MULTIPLE UNITS. . . . . . . . . . . . . . . . . . . 17

PIPING ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . .18

METHOD TWO: ONE PIPE SYSTEM . . . . . . . . . . . . . . 19

COMBUSTION AIR . . . . . . . . . . . . . . . . . . . . . . . . . . .19

A

IR SOURCE FROM OUTDOORS

S

PECIAL COMBUSTION AND VENTILATION

C

ONSIDERATIONS

S

PECIALLY ENGINEERED INSTALLATIONS

C

OMBUSTION AIR QUALITY

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

- . . . . . . . . . . . . . . . . . .20

. . . . . . . . . . . . 20

. . . . . . . . . . . . . . . . . . . . . . 20

VENT PIPE SIZING (1-PIPE SYSTEM) . . . . . . . . . . .21

VENT TERMINATION (1-PIPE SYSTEM) . . . . . . . . .21

VENT TERMINAL LOCATION CLEARANCES . . . . .21

PIPING ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . .23

METHOD THREE: TWO PIPE SYSTEM USING COM­BUSTION AIR FROM A VENTILATED ATTIC SPACE . 23

COMBUSTION AIR INTAKE . . . . . . . . . . . . . . . . . . . 23

COMBUSTION AIR TERMINATION . . . . . . . . . . . . . 23

COMBUSTION AIR REQUIREMENTS. . . . . . . . . . . . 23

VENT PIPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

VENT TERMINATION. . . . . . . . . . . . . . . . . . . . . . . . . 24

HORIZONTAL VENT APPLICATIONS . . . . . . . . . . . . . . . 24

CONDENSATE PIPING 24

C

ONVERSION FOR HORIZONTAL APPLICATIONS

. . . . . . . 25

SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

L

IMIT CONTROL

A

UXILIARY LIMIT CONTROLS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

. . . . . . . . . . . . . . . . . . . . . 27

START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . 27

IGNITION SYSTEM SEQUENCE . . . . . . . . . . . . . . . . . 27

GAS VALVE OPERATION . . . . . . . . . . . . . . . . . . . . . . 28

CHECKING GAS INPUT (NATURAL GAS) . . . . . . . . . 28

ADJUSTMENT OF MANIFOLD GAS PRESSURE . . . . 29

ADJUSTMENT OF TEMPERATURE RISE . . . . . . . . . . 30

ADJUSTMENT OF FAN-OFF CONTROL SETTINGS . 30

ACCESSORY CONNECTIONS . . . . . . . . . . . . . . . . . . 31

E

LECTRONIC AIR CLEANER CONNECTION

H

UMIDIFIER CONNECTION

. . . . . . . . . . . . . . . . . . . . . . . 31

. . . . . . . . . . . 31

FURNACE ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . 32

AIRFLOW DATA - UPFLOW . . . . . . . . . . . . . . . . . . . . . . 33

AIRFLOW DATA - DOWNFLOW/HORIZONTAL . . . . . . . 33

OPERATION AND MAINTENANCE . . . . . . . . . . . . . . . . . 34

SEQUENCE OF OPERATION. . . . . . . . . . . . . . . . . . . . 34

CONTINUOUS BLOWER . . . . . . . . . . . . . . . . . . . . . . . 34

INTERMITTENT BLOWER - COOLING . . . . . . . . . . . . 34

HEATING CYCLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

H

OT SURFACE IGNITION SYSTEM

. . . . . . . . . . . . . . . . . 34

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

A

IR FILTERS

F

ILTER REMOVAL

F

ILTER REMOVAL

H

ORIZONTAL APPLICATIONS

L

UBRICATION

B

LOWER CARE

B

URNER REMOVAL/CLEANING

C

LEANING THE HEAT EXCHANGER

C

LEANING THE SECONDARY HEAT EXCHANGER

V

ENT/AIR INTAKE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

- U

PFLOW MODELS

- D

OWNFLOW MODELS

. . . . . . . . . . . . . . 35

. . . . . . . . . . . . 35

. . . . . . . . . . . . . . . . . . . . . 36

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

. . . . . . . . . . . . . . . . . . . . 36

. . . . . . . . . . . . . . . . . 36

. . . . . . . 37

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

FURNACE CONTROL DIAGNOSTICS . . . . . . . . . . . . . . 37

WIRING DIAGRAM - UPFLOW MODELS. . . . . . . . . . . . . 39

WIRING DIAGRAM - DOWNFLOW/HORIZONTAL . . . . . 40

2 Unitary Products Group

035-14370-000 650.75-N4U

GENERAL INFORMATION

DESCRIPTION

IMPROPER INSTALLATION MAY CREATE A
CONDITION WHERE THE OPERATION OF THE
PRODUCT COULD CAUSE PERSONAL INJURY
OR PROPERTY DAMAGE.

IMPROPER INSTALLATION, ADJUSTMENT,
ALTERATION, SERVICE OR MAINTENANCE
CAN CAUSE INJURY OR PROPERTY DAMAGE.
REFER TO THIS MANUAL FOR ASSISTANCE
OR ADDITIONAL INFORMATION, CONSULT A
QUALIFIED INST ALLER, SER VICE AGENCY OR
THE GAS SUPPLIER.

THIS PRODUCT MUST BE INSTALLED IN
STRICT COMPLIANCE WITH THE ENCLOSED
INSTALLATION INSTRUCTIONS AND ANY
APPLICABLE LOCAL, STATE, AND NATIONAL
CODES INCLUDING BUT NOT LIMITED TO,
BUILDING, ELECTRICAL AND MECHANICAL
CODES.

This Category IV, dual certified, direct vent and 1-pipe vent
furnace is designed for residential or commercial installation
in a basement, closet, recreation room, garage or other loca­tion provided space temperature is 32°F or higher. For appli­cations in below freezing locations, refer to “BELOW
FREEZING LOCATIONS” section on page 5.

INSPECTION

As soon as a unit is received, it should be inspected for possi­ble damage during transit. If damage is evident, the extent of
the damage should be noted on the carrier's freight bill. A
separate request for inspection by the carrier's agent should
be made in writing. Also, before installation the unit should be
checked for screws or bolts which may have loosened in tran­sit. There are no shipping or spacer brackets which need to
be removed.

NOTES, CAUTIONS & WARNINGS

The installer should pay particular attention to the words:
NOTE, CAUTION and WARNING. NOTES are intended to

clarify or make the installation easier. CAUTIONS are given
to prevent equipment damage. WARNINGS are given to alert
the installer that personal injury and/or equipment or property
damage may occur if installation procedures are not handled
properly.

The furnace area must not be used as a broom
closet or for any other storage purposes, as a fire
hazard bay be created. Never store items such as

The cooling coil must be installed in the supply air
duct, downstream of the furnace. Cooled air may
not be passed over the heat exchanger.

the following on, near or in contact with the fur­nace.

VENT SAFETY CHECK PROCEDURE

1. Spray or aerosol cans, rags, brooms, dust mops,
vacuum cleaners or other cleaning tools.

2. Soap powders, bleaches, waxes or other cleaning
compounds; plastic items or containers; gasoline,
kerosene, cigarette lighter fluid, dry cleaning fluids
or other volatile fluid.

3. Paint thinners and other painting compounds.

This furnace may not be common vented with any
other appliance, since it requires separate, prop­erly-sized air intake and vent lines. The furnace
shall not be connected to any type of B, BW or L

4. Paper bags, boxes or other paper products

Never operate the furnace with the blower door

vent or vent connector, and not connected to any
portion of a factory-built or masonry chimney.

removed. To do so could result in serious personal
injury and/or equipment damage.

Unitary Products Group 3

If this furnace is replacing a common-vented furnace, it may
be necessary to resize the existing vent line and chimney to

650.75-N4U 035-14370-000

prevent oversizing problems for the new combination of units.
Refer to the National Gas Code (ANSI Z223.1) or CAN/CGA
B149.1 or.2 Installation Code (latest editions).

The following steps shall be followed with each appliance
connected to the venting system placed in operation, while
any other appliances connected to the venting system are not
in operation:

1. Seal any unused openings in the venting system.

2. Inspect the venting system for proper size and horizontal
pitch, as required in the National Fuel Gas Code, ANSI
Z223.1, or the CAN/CGA B149 Installation Codes and
these instructions. Determine that there is no blockage
or restriction, leakage, corrosion or other deficiencies
which could cause an unsafe condition.

3. Insofar as is practical, close all building doors and win­dows and all doors between the space in which the appli­ance(s) is located and other spaces of the building. Turn
on clothes dryers. Turn on any exhaust fans, such as
range hoods and bathroom exhausts, so they shall oper­ate at maximum speed. Do not operate a summer
exhaust fan. Close fireplace dampers.

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

5. Test for draft hood equipped appliance spillage at the
draft hood relief opening after 5 minutes of main burner
operation. Use the flame of a match or candle.

Downflow/horizontal models are AGA/CGA listed for down­flow application into a manufactured (mobile) home.

Upflow models or horizontal applications are not approved for
mobile homes.

A manufactured (mobile) home installation must conform with
the Manufactured Home Construction and Safety Standard,
Title 24 CFR, Part 3280, or when this standard is not applica­ble, the Standard for Manufactured Home Installations (Man­ufactured Home Sites, Communities and Set-Ups), ANSI
A225.1, and/or CAN/CSA-Z240 MH Series, Mobile Homes.

CLEARANCES FOR ACCESS

Ample clearances should be provided to permit easy access
to the unit. The following minimum clearances are recom­mended:

1. Twenty-four (24) inches between the front of the furnace
and an adjacent wall or another appliance, when access
is required for servicing and cleaning.

2. Eighteen (18) inches at the side where access is
required for passage to the front when servicing or for
inspection or replacement of flue/vent connections.

:

NOTE

In all cases, accessibility clearances shall take prece­dence over clearances for combustible materials where
accessibility clearances are greater.

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

7. If improper venting is observed during any of the above
tests, the venting system must be corrected.

8. Any corrections to the common venting system must be
in accordance with the National Fuel Gas Code Z223.1
or CAN/CGA B149.1 or.2 Installation Code (latest edi­tions). If the common vent system must be resized, it
should be resized to approach the minimum size as
determined using the appropriate tables in Appendix G
of the above codes.

SPECIFIC UNIT INFORMATION

LIMITATIONS & LOCATION

This furnace should be installed in accordance with all
national and local building/safety codes and requirements, or
in the absence of local codes, with the National Fuel Gas
Code ANSI Z223.1 or CAN/CGA B149.1 or.2 Installation
Code (latest editions), local plumbing or waste water codes,
and other applicable codes.

Do not install the furnace in an unconditioned
space or garage that could experience ambient
temperatures of 32F (0C) or lower. For application
in below freezing locations, See “BELOW FREEZ­ING LOCATIONS” on page 5

The furnace is not to be used for temporary heat­ing of buildings or structures under construction.

This unit must be installed in a level (1/4”) position
side-to-side and front-to-back to provide proper
condensate drainage.

Do not allow return air temperature to be below
55°F for extended periods. To do so may cause
condensation to occur in the main fired heat
exchanger.

4 Unitary Products Group

035-14370-000 650.75-N4U

vent chilled air from entering the furnace, and if manually
operated, must be equipped with means to prevent operation
of either unit unless the damper is in the full heat or cool posi­tion.

Furnaces shall not be installed directly on carpet­ing, tile or other combustible material other than

The furnace shall be located:

wood flooring. An accessory combustible floor
base is available to allow direct installation of
downflow models on combustible flooring.

1. Where a minimum amount of air intake/vent pipin
elbows will be required.

g and

Furnace shall be installed so the electrical compo­nents are protected from water.

The size of the unit should be based on an acceptable heat
loss calculation for the structure.

Check the rating plate to make certain the unit is equipped for
the type of gas supplied, and proper electrical characteristics
are available.

For installations above 2,000 feet, reduce input 4% for each
1,000 feet above sea level. Refer to Form 650.75-N2.1V for
correct pressure switch/orifice or other required conversion
information.

A furnace installed in a residential
that all burners and burner ignition devices are located not
less that 18" above the garage floor, and located or protected
to prevent damage by vehicles.

Allow clearances from combustible materials as listed under
Clearances to Combustibles, ensuring that service access is
allowed for both the burners and blower.

When the furnace is used in conjunction with a cooling coil,
the furnace must be installed parallel with or on the upstream
side of the cooling unit to avoid condensation in the primary
heat exchanger.

When a parallel flow arrangement is used, the dampers or
other means used to control air flow shall be adequate to pre-

garage shall be located so

2. As centralized with the air distribution as possible.

3. In an area where ventilation facilities provide for safe lim­its of ambient temperature under normal operating con­ditions. Ambient temperatures must not fall below 32°F
(0°C).

4. Where it will not interfere with proper air circulation in the
confined space.

5. Where the outdoor combustion air/vent terminal will not
be blocked or restricted.

6. Where it will not interfere with the cleanin
removal of other appliances.

g, servicing or

CLEARANCES TO COMBUSTIBLES

Minimum clearances from combustible construction are
shown in Table 3, “UNIT CLEARANCES TO COMBUSTI­BLES,” on page 8.

BELOW FREEZING LOCATIONS

If this furnace is installed in any area where the ambient tem­perature may drop below 32° F, a UL listed self regulated
heat tape must be installed. It is recommended that self regu­lating heat tape rated at 3 watts per foot be used. This must
be installed around the condensate drain lines in the uncondi­tioned space. Always install the heat tape per the manufac­turer's instructions. Cover the self-regulating heat tape with
fiberglass or other heat resistant, insulating material.

Unitary Products Group 5

650.75-N4U 035-14370-000

4

Models P*XU &

G9D—UH

60 / 55 / 1200 / “B”

80 / 75 / 1200 / “B”

1.

C

4

C

12-3/4

16-1/4

16-1/4

19-3/4

19-3/4

19-3/4

23-1/4

2 (3)

23-1/4

2 (3)

1

DIMENSIONS - UPFLOW MODELS: P*UR/FG9-UP/G9T-UP

B

B

45

3/4

3/4

G A S O U T L E T
1-1/4" X 2-1/2"
(A ll gas pipe
connections 1/2" N P T)

45

B

A

A

20

FRO N T LEFT SIDE

FRO N T LEFT SIDE

A

C

(W IT H K .O .
REM OVED )

BO TTO M IM AG E

(F R O N T )

20

D

In ta k e

onnection

B

FRO N T

TO P IM AG E

D

In ta k e

onnection

E

Vent C onnection
(v e n t s iz e )

FRONT

28-1/2

TO P IM AG E

23

ALL DIMENSIONS ARE IN INCHES, AND ARE
APPROXIMATE.

20

20

G A S O U T L E T
1-1/4" X 2-1/2"
(A ll gas pipe
connections 1/2" N P T)

OPTIONAL SIDE

OPTIONAL SIDE

RETURN CUT-OUT

RETURN CUT-OUT

(EITHER SIDE)

(EITHER SIDE)

28-1/2

28-1/2

28-1/2

7-5/8

E

Vent C onnection
(v e n t s iz e )

3/4"
FLANG E

7-5/8

3-1/4

3-1/4

7/8" H O LE
POW ER W IRING

POW ER W IRING

1-3/4

1-3/4

T'STAT W IR ING

T'STAT W IR ING

7/8" K .O .

7/8" K.O .

A

C

9-7/8

6-7/8

6-7/8

(W IT H K .O .

23

DRAIN

CONDENSATE

REM O VED)

Models P*UR/

FG9-UP/G9T—UP

40 / 37 / 800 / A 14-1/2

BO TTO M IM A G E

(F R O N T )

60 / 55 / 1000 / B 17-1/2
80 / 75 / 1200 / B 17-1/2

80 / 75 / 1600 / C 21
100 / 95 / 1400 / C 21
100 / 95 / 2000 / C 21

120 / 112 / 2000 / D 24-1/2

140 / 130 / 2000 / D 24-1/2

1.

Vent pipe must be increased to 3” on this model.

4-1/8

4-1/8

7/8" H O LE

9-7/8

CONDENSATE
DRAIN

7-5/8

7-5/8

1-1/4

1-1/4

1-3/4

1-3/4

14-1/2

14-1/2

22-3/4

22-3/4

RIGHT SIDE

RIGHT SIDE

3/4"

ABCDE

FLANG E

10-1/8 2 2
13-1/8 2 2
13-1/8 2 2

80 / 75 / 1600 / “C” 21 19

16-5/8 2 2

100 / 95 / 1400 / “C” 21 19

16-5/8 2 2

100 / 95 /2000 / “C” 21 19

16-5/8 2 2
20-1/8 3

120 / 112 / 2000 / “D” 24-1/2 23

20-1/8 3

Vent pipe must be increased

1

1

3/

3/

A

17-1/2 16
17-1/2 16

1

FIGURE 1 :

TABLE 1: RATINGS & PHYSICAL / ELECTRICAL DATA - UPFLOW MODELS (P*UR/FG9-UP/G9T-UP)

MODELS P*UR/FG9-UP/

G9T—UP

INPUT

MBH

OUTPUT

MBH

NOM

CFM

.

CABINET

WIDTH

IR

MEAN AIR

CFM

TEMP

RISE

1

A

TEMP

RISE °F

AFUE

@

OUTLET

TEMP

MAX

AIR

.

F

. °

DIA (IN

BLOWER

WIDTH

)

IN

(

MAX

OVER

CURRENT

PROTECT

TOTAL

HP

UNIT

AMPS

.)

40 37 800 14-1/2 92.4 35 - 65 685 165 9 6 1/4 9.0 20 14
60 55 1000 17-1/2 92.2 45 - 75 850 175 10 6 1/3 9.0 20 14
80 74 1200 17-1/2 92.0 35 - 65 1160 165 11 8 1/2 9.0 20 14

80 76 1600 21 94.3 30 - 60 1540 160 11 8 3/4 12.0 20 14
100 93 1400 21 92.2 45 - 75 1465 175 10 10 1/2 9.0 20 14
100 94 2000 21 93.0 30 - 60 1955 160 11 10 1 12.0 20 14
120 112 2000 24-1/2 92.0 45 - 75 1730 175 11 10 1 12.0 20 14
140 130 2000 24-1/2 92.0 45 - 75 2005 175 11 10 1 12.0 20 14

1.

AFUE numbers are determined in accordance with DOE test procedures

2.

Wire size and overcurrent protection must comply with the National Electrical Code (NFPA-70-latest edition).
For altitudes above 2,000 ft., reduce capacity 4% for each 1,000 ft. above sea level. Refer to Form 650.74-N1.1V.
Wire size based on copper conductors, 60°C, 3% voltage drop.
Continuous return air temperature must not be below 55°F.

-

2

MIN

SIZE (AWG

@ 75

ONE WAY

WIRE

)

FT

.

2

6 Unitary Products Group

035-14370-000 650.75-N4U

T

B

3/4

C ondensate

D rain A ccess

3-1/4 X 3

45

Air Intake

3-5/8 x 3-5/8

C onn. S ize/

(

G

Pipe S ize)

A

FRO N T LEFT SIDE

B

Power

20

Wiring

7/8" K .O .

1-7/8

E

OP IMAGE/RETURN END

D

FRO N T

Vent C onnection

(v e n t s iz e )

5-3/8

F

1-3/8

3 7/8

BOTTOM IM AG E/SU PPLY END

ALL DIMENSIONS ARE IN INCHES, AND ARE APPROXIMATE.

H

19-1/4

G A S IN L E T

A

C

FRO N T

1-3/8

8

D

20

T'STAT W IR ING

7/8" K .O .

1 -3 /4

5-1/4

3-3/4

G A S IN L E T
1-1/4" X 2-1/2"

2 -3 /4

(V ent C onnection)

35

18-1/2

16-3/4

1-1/4

7 -1 /2

6 -1 /4

4 -1 /8

3-3/4

C ondensate
D rain A ccess
3-1/4 X 3

6-1/2

Air Intake

3-5/8 x 3-5/8

C onn. S ize/

(

G

Pipe Size)

1-1/4

ALT. G AS IN LET

1-1/4" X 2-1/2"

2 8 -1 /2

RIGHT SIDE

MODELS P*DH/
FG9-DH/G9TDH

40 /37 / 800 / A 14-1/2 13-1/4 11-3/4 2 5-1/8 2-1/2 2
60 /55 / 1200 / B 17-1/2 16-1/4 14-3/4 2 6-5/8 2-1/4 2
80 /75 / 1200 / B 17-1/2 16-1/4 14-3/4 2 6-5/8 2-1/4 2

80 /75 / 1600 / C 21 19-3/4 18-1/4 2 8-3/8 2-1/4 2

100 /95 / 2000 / C 21 19-3/4 18-1/4 2 8-3/8 2-1/4 2

120 /112 / 2000 / D 24-1/2 23-1/4 21-3/4

1.

Vent pipe must be increased to 3” on this model.

ABCDEFG

1

2 (3)

10-1/8 2-1/4 3

FIGURE 2 : DIMENSIONS - DOWNFLOW/HORIZONTAL MODELS: P*DH/FG9-DH/G9T-DH

TABLE 2: RATINGS & PHYSICAL / ELECTRICAL DATA - UPFLOW MODELS (P*DH/FG9-DH/G9T-DH)

MODELS P*DH/FG9-DH/

1

A

TEMP

RISE °F

INPUT

MBH

G9T—DH

OUTPUT

MBH

CABINET

NOM

CFM

WIDTH

.

AFUE

40 37 800 14-1/2 91.0 25 - 55 856 155 10 6 1/4 9.0 20 14
60 55 1200 17-1/2 91.0 35 - 65 1018 165 11 8 1/2 9.0 20 14
80 75 1200 17-1/2 91.0 35 - 65 1370 165 11 8 1/2 9.0 20 14

80 75 1600 21 91.0 30 - 60 1563 160 11 8 3/4 12.0 20 14
100 95 2000 21 91.0 40 - 70 1582 170 11 10 1 12.0 20 14
120 112 2000 24-1/2 91.0 40 - 70 1885 170 11 10 1 12.0 20 14

1.

AFUE numbers are determined in accordance with DOE test procedures

2.

Wire size and overcurrent protection must comply with the National Electrical Code (NFPA-70-latest edition).
For altitudes above 2,000 ft., reduce capacity 4% for each 1,000 ft. above sea level. Refer to Form 650.74-N1.1V.
Wire size based on copper conductors, 60°C, 3% voltage drop.
Continuous return air temperature must not be below 55°F.

IR

MEAN AIR

CFM

TEMP

RISE

@

OUTLET

TEMP

MAX

AIR

.

BLOWER

DIA

F

. °

(IN)

WIDTH

IN

.)

(

HP

TOTAL

UNIT

AMPS

MAX

OVER

CURRENT

PROTECT

-

2

WIRE

MIN

SIZE (AWG

FT

@ 75

ONE WAY

)

.

2

Unitary Products Group 7

650.75-N4U 035-14370-000

TABLE 3: UNIT CLEARANCES TO COMBUSTIBLES

APPLICATION TOP FRONT REAR

UPFLOW 1 3 0 0 0 0 COMBUSTIBLE YES YES YES NO

DOWNFLOW / HORIZONTAL MODELS (P*DH / FG9-DH / G9T-DH)

DOWNFLOW130000

HORIZONTAL 0 3 0 1 1 0

1.

Special floor base or air conditioning coil required for use on combustible floor.

2.

Minimum of 8” clearance required to install condensate removal system.

3.

Line contact only permitted between lines formed by the intersection of the rear panel and side panel (top in horizontal position) of the
furnace jacket and building joists, studs or framing.

LEFT
SIDE

UPFLOW MODELS (P*UR / FG9-UP / G9T-UP)

RIGHT

SIDE

FLUE

FLOOR/

BOTTOM

1

1"

COMBUSTIBLE

CLOSET ALCOVE ATTIC

YES YES YES NO

2

NO YES YES

When the furnace is used in conjunction with a cooling coil,
the furnace must be installed parallel with, or on the upstream
side of the cooling unit to avoid condensation in the primary
heat exchanger.

If this unit is installed in an unconditioned space
and an extended power failure occurs, there will
be potential damage to the condensate trap, drain
lines and internal unit components. Following a
power failure situation,

Do Not Operate the Unit

Until Inspection and Repair Are Performed.

When a parallel flow arrangement is used, the dampers or
other means used to control air flow must be adequate to pre­vent chilled air from entering the furnace, and if manually
operated, must be equipped with means to prevent operating
of either unit unless the damper is in the full heat or cool posi­tion.

LINE
CON­TACT

YES

3

DUCTWORK

The duct system's design and installation must:

1. Handle an air volume appropriate for the served space
and within the operating parameters of the furnace spec­ifications.

2. Be installed in accordance with standards of NFPA
(National Fire Protection Association) as outlined in
NFPA pamphlets 90A and 90B (latest editions) or appli­cable national, provincial, local fire and safety codes.

3. Create a closed duct system. The supply duct system
must be connected to the furnace outlet and the return
duct system must be connected to the furnace inlet. Both
supply and return duct systems must terminate outside
the space containing the furnace.

4. Generally complete a path for heated or cooled air to cir­culate through the air conditioning and heating equip­ment and to and from the conditioned space.

UPFLOW MODELS

SUPPLY PLENUM CONNECTION

Attach the supply plenum to the fur­nace outlet duct connection flanges.
This is typically through the use of S
cleat material when a metal plenum is
used. The use of an approved flexible
duct connector is recommended on all
installations. This connection should be
sealed to prevent air leakage.

If a matching cooling coil is used, it
may be placed directly on the furnace
outlet and sealed to prevent leakage.
Follow the coil instructions for installing
the supply plenum.

On all installations without a coil, a removable access panel
is recommended in the outlet duct such that smoke or
reflected light would be observable inside the casing to indi­cate the presence of leaks in the heat exchanger. This
access cover shall be attached in such a manner as to pre­vent leaks.

The cooling coil must be installed in the supply air
duct downstream of the furnace.

8 Unitary Products Group

035-14370-000 650.75-N4U

g

g

g

g

g

g

g

g

g

g

F

RETURN DUCT CONNECTION

Return air may enter the furnace through the side(s) or bot­tom depending on the type of application.

not be connected into the rear panel of the unit.

Return air may

See the
specific type application installation for details. Be sure to see
the Filters section of this instruction.

CLIPS

POSITION WIRE RETAINER
(PROVIDED) UNDER FLANGE

FILTER

(PROVIDED

UPFLOW FILTER INSTALLATION

All applications require the use of a filter. A high velocity filter
and retainer are provided for field installation.

Internal Installation

1. Select desired filter position (left/ri

Remove the correspondin

cabinet cut-outs per instruc-

ht side, or bottom).

tions provided.

2. Install snap-in retainer clips into the correspondin

from the outside rear of the cabinet (Refer to Fi
To prevent cabinet air leaks, install snap-in plu

slots

ure 3.)

s (pro­vided) into the unused slots at the outside rear of the
cabinet.

FURNACE

(REAR CABINET)

LEFT

RIGHT
SIDE
SLOTS

BOTTOM SLOTS
CABINET
SLOT

FILTER SUPPORT
CLIPS (PROVIDED)

SIDE
SLOTS

PLUG UNUSED
CABINET SLOTS
WITH PLUGS
(PROVIDED)

RIGHT SIDE
INSTALLATION
SHOWN

FURNACE

FRONT

FIGURE 4 : SIDE FILTER RETAINER PLACEMENT

5. Position the filter between the wire retainer and the cabi­net wall (or floor) so it completely covers the cabinet air
opening and secure the filter in place at the front of the
cabinet by fastening the closed (looped) end of the
retainer wire under the flanged edge of the cabinet.
When properly installed the filter should fit flush with all
four sides of the cabinet wall.

NOTE:

Air velocity through throw-away type filters may not
exceed 300 feet per minute. All velocities over this require the
use of high velocity filters.

Side Return - External Filter

Locate and knock out the square corner locators. These indi­cate the size of the cutout to be made in the furnace side
panel (Refer to Figure 5).

FIGURE 3 : FURNACE FILTER SLOT LOCATIONS

3. Install the wire retainer inside the cabinet. Insert the
open ends of the wire retainer into the clip loops at the
rear of the blower compartment. The retainer wire should
pivot freely like a hin
cabinet. (Refer to Fi

4. Install the filter(s) provided. Cut filter if necessary to
match air openin
beyond openin
from bypassin
from inside the filter. Shorten the rods, if necessary, to
match final filter size.

Unitary Products Group 9

e, on the clips at the rear of the

ure 4.)

in cabinet. Filter should extend

edge as much as possible to prevent air

the filter. DO NOT remove stiffening rods

FR O N T O
FU RN A CE

CORNER
MARKINGS

FIGURE 5 : SIDE RETURN CUTOUT MARKINGS

Install the side filter rack following the instructions provided
with that accessory. If a filter(s) is provided at another loca­tion in the return air system, the ductwork may be directly
attached to the furnace side panel.

650.75-N4U 035-14370-000

NOTE:

Some accessories such as electronic air cleaners and

pleated media may require a larger side opening.

DOWNFLOW/HORIZONTAL MODELS­DOWNFLOW APPLICATION

DOWNFLOW FILTERS

A top return filter rack is supplied with

All installations must have a filter installed.

The return duct may be attached to the furnace by S-cleat,
bend tabs or other approved methods. Be sure to seal the
duct to the furnace to prevent air leakage.

Those applications over 1800 CFM require either return from
two sides, one side and the bottom, or bottom only. For bot­tom only application, see data and notes on blower perfor­mance data tables in this manual.

Where the return duct system is not complete, the return con­nection must run full size to a location outside the utility room
or basement. For further details, consult Section 5.3 (Air for
Combustion and Ventilation) of the National Fuel Gas Code,
ANSI Z223.1, or CAN/CGA B149.1 or.2, Installation Code ­latest editions.

Bottom Return

Bottom return applications normally pull return air throu

gh a
base platform or return air plenum. Be sure the return plat­form structure is suitable to support the weight of the furnace.
Be sure to seal the furnace to plenum connection to prevent
air leakage. (Refer to Figure 3 on page 9) and (Refer to
Table 1 on page 6).

The bottom panel is equipped with a perforated opening for
easy removal. Tabs must be cut with sheet metal snips to
allow removing knock-out. Scribe marks are included for
forming flanges for attachment of the return air ductwork.

NOTE:

If an external mounted filter rack is being used, see
the instructions provided with that accessory for proper hole
cut size.

Upflow attic installations must meet all minimum clearances
to combustibles and have floor support with required service
accessibility.

A

DUCTW ORK

FIGURE 6 : DOWNFLOW FILTERS

the furnace. Two 14" x 20" permanent
washable filters are supplied with each
unit.

Downflow furnaces typically are
installed with the filters located above
the furnace, extending into the return
air duct.

Any branch duct must attach to the ver­tical ductwork above the filter height
(FH) and for proper installation refer to
Figure 6.

F IL T E R R A C K
(FACTO RY SU PPLIED )

R A C K A N D F IL T E R S S E C U R E D

A

NOTE: FILTER ACCESS THRU DUCT­W O RK M UST BE PRO VIDED FOR
REMOVAL AND CLEANING

C R O S S S E C T IO N A -A
(W ITH PLENU M AND FILTERS)

IN SIDE BLO W ER SECTIO N
FO R S HIPM EN T

C A S IN G S IZ E D IM E N S IO N F H
1 4 -1 /2 " 1 3 -1 /4 "
1 7 -1 /2 " 1 2 -1 /2 "
2 1 " 1 1 - 1 /2 "
2 4 -1 /2 " 9 -3 /4 "

FILTER S

FILTER
RACK

BRANCH
DUCTS

FH

10 Unitary Products Group

The filter rack (provided) should be secured to the center of
the front and rear flanges at the furnace top. Drill a hole
through the front and rear duct flange into the filter rack and
secure it with a sheet metal screw.

Refer to the unit rating plate for furnace model then see the
dimensions page of this instruction for return air plenum
dimensions. Install the plenum following instructions under
Ductwork in this instruction.

035-14370-000 650.75-N4U

VENT (MAINTAIN
REQUIRED CLEARANCES
TO COMBUSTIBLES)

GAS PIPING

SEDIMENT TRAP

12"

30" MIN
WORK AREA

SHEET METAL
IN FRONT OF FURNACE
COMBUSTION
AIR OPENINGS IS
RECOMMENDED

RETURN AIR

SUPPLY AIR

LINE CONTACT ONLY PERMISSIBLE
BETWEEN LINES FORMED BY THE
INTERSECTION OF FURNACE TOP
AND TWO SIDES AND BUILDING
JOISTS, STUDS OR FRAMING

DOWNFLOW / HORIZONTAL MODELS ­HORIZONTAL APPLICATION

DOWNFLOW
FURNACE

WARM AIR PLENUM
WITH 1" FLANGES

FIBERGLASS
INSULATION

FIBERGLASS TAPE
UNDER FLANGE

COMBUSTIBLE FLOOR
BASE ACCESSORY

FIGURE 7 : COMBUSTIBLE FLOOR BASE

ACCESS’Y

SUPPLY AIR DUCTS

Installations on combustible material or floors must use a
combustible floor base (shown in Figure 7 - 1CB0314, 17, 21
& 24) as specified on the rating plate or a matching cooling
coil. Follow the instructions supplied with the combustible
floor base accessory.

This base can be replaced with a matching cooling coil, prop­erly sealed to prevent leaks. Follow the cooling coil instruc­tions for installing the plenum.

Downflow furnaces may be installed horizontally with the sup­ply airflow toward the left or right by laying the unit on the left
or right side panel.

Do not install the unit on the rear panel.

After determining the best orientation, lay the unit on top of
the shipping carton to protect the finish. The appropriate elec­trical knock-outs for power wiring, control wiring and gas pip­ing should be removed at this time.

For horizontal application, return air may enter through the
end only.

Return air may not be connected into the rear

panel of the unit.

HORIZONTAL FILTERS

All filters and mounting provision must be field supplied. Fil­ters(s) may be located in the duct system external to the fur­nace or in a return filter grille(s).

ATTIC INSTALLATION

All downflow application supply duct systems must be
designed and installed in accordance with the standards of
NFPA 90A and 90B, and/or all local codes.

Unitary Products Group 11

FIGURE 8 : TYPICAL ATTIC INSTALLATION

650.75-N4U 035-14370-000

g

This appliance is design certified for line contact for furnaces
installed horizontally. The intersection of the furnace top and
sides form a line. This line may be in contact with combustible
material. Refer to “Where it will not interfere with the cleanin
servicing or removal of other appliances." Section on page 5
in this manual for additional information.

Secure a platform constructed of plywood or other building
material to the floor joists. Sheet metal, 12" in front of the fur­nace combustion air openings is recommended. (Refer to
Figure 9.)

Note:

The unit must be elevated to allow clearnace fo the

condensate trap and drain pipe

. .

If this furnace is installed over a finished space, a
condensate safety pan must be installed.

adequate height to ensure the unit will not be subject to water
damage.

,

When suspending the furnace from rafters or floor joists
using rod, pipe or straps, refer to Physical Data and,Table 3,
“UNIT CLEARANCES TO COMBUSTIBLES,” on page 8, for
furnace weights to determine suitable means of suspension.

Angle supports should be placed at the supply aire end and
near the blower deck. (Refer to Figure 9.)

Do not support

at return air end of unit.

Units may also be suspended by using straps or other mate­rial at the same location. All four suspension points must be
level to ensure quiet furnace operation.

In any application where temperatures below
freezing are possible, See “BELOW FREEZING
LOCATIONS” on page 5

GAS PIPING

When a furnace is installed in an attic or other
insulated space, keep all insulating materials at
least 12" away from furnace and burner combus­tion air openings.

NOTE:

See crawl space installation for suspending the fur­nace in attic installations.

ANGLE IRON
BRACKET

1" MAX BETWEEN
ROD & FURNACE

6" MIN BETWEEN
ROD & FURNACE

SUPPORT
ROD

1" MAX BETWEEN
ROD & FURNACE

FIGURE 9 : TYPICAL FURNACE INSTALLATION

USING SUSPENSION MATERIALS

CRAWL SPACE INSTALLATION

The furnace can be hung from floor hoists or installed on suit­able blocks or pad. Blocks or pad installations shall provide

The gas supply must be installed in accordance with the cur­rent National Fuel Gas Code, ANSI Z223.1 (in the U.S.) or
CAN-B149.1 or.2 (in Canada) installation codes and all appli­cable local and utility requirements. All pipe and fitting mate­rial, pipe size and installation procedures must comply with
the appropriate code. Some utilities may require larger pipe
sizes than shown in the code. Gas piping may be connected
from either side of the furnace. Each side of the unit has two
gas pipe entry knockouts.

For downflow/horizontal models,

piping before determining the correct gas pipe entry

plan your combustion air

. Use 90
degree service elbow(s), or short nipples and conventional 90
degree elbow(s) to enter through the cabinet access holes..

An overpressure protection device, such as a
pressure regulator, which conforms to the National
Fuel Gas Code, ANSI Z223.1 (U.S.) or CAN­B149.1 or.2 (Canada) and acts to limit the down­stream pressure to a value that does not exceed

0.5 PSI (14" w.c.), must be installed in the gas pip­ing system upstream of the furnace. Failure to do
so may result in a fire or explosion or cause dam­age to the furnace or some of its components.

12 Unitary Products Group