TRANE Furnace/Heater, Gas Manual L0903222

User Manual: TRANE TRANE Furnace/Heater, Gas Manual TRANE Furnace/Heater, Gas Owner's Manual, TRANE Furnace/Heater, Gas installation guides

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*UD-IN-2F
18-CD19D7-13

Upflow / Horizontal _ Downflow / Horizontal,
Gas=Fired Furnaces, "Fan Assisted

Combustion System"
*UD040C-K
*UD060C-K
*UD080C-K

*UD100C=K
*UD120C-K
*UD140C-K

*DD040C=F
*DD060C-F
*DD080C-F

*DD100C-F
*DD120C-F
*DD140C-F

*__First letter may be "A" or "T"
ALL phases

of this

installation

must

comply

with

NATIONAL,

IMPORTANT
-- This Document is customer
Please return to service information

For VENT
USA -National

SIZING

STATE AND LOCAL

property
and is to remain with this unit.
pack upon completion of work.

INFORMATION

Fuel Gas Code ....... ANSI Z223.1/NFPA

see:
54 (latest

CANADA -Natural
Gas Installation
Code ..... CAN/CGA-B149.1
Propane Installation
Code ............ CAN/CGA-B149.2
USA/CANADA
ALTERNATE
-Category I Venting Guide ...............................

Upflow / Horizontal*

CODES

(latest
(latest

version)
version)
version)

Pub. No. 18-CH23D1-2

Downflow

/ Horizontal*

*Horizontal Conversion for these furnaces may be left or right side rotation.

A341789P01

|nsta||er's

Guide
SAFETY SECTION

The following safety practices and precautions
nmst be
followed during the installation,
servicing, and operation
this furnace.
1. Use only with the type of gas approved
Refer to the furnace rating plate.

of
CARBON MONOXIDE

for this furnace.

2. Install this furnace only in a location and position as
specified in "Location and Clearances" (page 3), of these
instructions.
3. Provide adequate eombustion and ventilation
air to the
furnace space as specified in "Air for Combustion
and
Ventilation"
(pages 7-8), of these instruetions.
4. Combustion products must be discharged
outdoors.
Connect this furnace to an approved vent system only, as
specified in the "Venting" section (pages 13-14), of 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
specified in "Gas Piping" (page 17), of these instructions.
6. Always install the 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 on the unit rating plate.
Airflow with temperature
rise for cfm versus static is
shown in the Service Facts accompanying
this furnace.

POISONING HAZARD

Failure to follow the steps outlined below for each
appliance connected to the venting system being
placed into operation could result in carbon monoxide
poisoning or death.
The following steps shall be followed for each appliance
connected to the venting system being placed into
operation, while all other appliances connected to the
venting system are not in operation:
1. Seal any unused openings in the venting system.
2. Inspect the venting system for proper size and
horizontal pitch, as required in the National Fuel Gas
Code, ANSI Z223.1/NFPA 54 or the CAN/CGA B149
Installation Codes and these instructions. Determine
that there is no blockage or restriction, leakage,
corrosion and other deficiencies which could cause an
unsafe condition.
3.

As far as practical, close all building doors and
windows and all doors between the space in which the
appliance(s) connected to the venting system are
located and other deficiencies which could cause an
unsafe condition.

Close fireplace dampers.

7. When a furnace is installed so that supply ducts carry
air circulated by the furnace to areas outside the space
containing the furnace, the return air shall also be
handled by a duct(s) sealed to the furnace casing and
terminating
outside the space containing the furnace.

5. Turn on clothes dryers and any appliance not
connected to the venting system. Turn on any exhaust
fans, such as range hoods and bathroom exhausts, so
they are operating at maximum speed. Do not operate
a summer exhaust fan.

8. A gas-fired furnace for installation
in a residential
garage must be installed as specified in "Location
Clearances"
section (page 3), of these instructions.

Follow the lighting instructions. Place the appliance
being inspected into operation. Adjust the thermostat
so appliance is operating continuously.

If improper venting is observed during any of the above
tests, the venting system must be corrected in
accordance with the National Fuel Gas Code,
ANSI Z221.1/NFPA 54 and/or CAN/CGA B149
Installation Codes.

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

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

and

heating

Safety signal words are used to designate a degree or level of
seriousness
associated with a particular
hazard. The signal
words for safety markings are DANGER, WARNING, and
CAUTION.
a. DANGER indicates an imminently
hazardous
situation
which, if not avoided, will result in death or serious
injury. This signal word is limited to the most extreme
situations.
b. WARNING indicates a potentially hazardous
situation
which, if not avoided, could result in death or serious
injury.
c. CAUTION indicates a
which, if not avoided,
injury. It is also used
and hazards involving

potentially hazardous
situation
may result in minor or moderate
to alert against unsafe practices
only property damage.

FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result in
serious injury, death or property damage.
Improper servicing could result in dangerous operation,
serious injury, death, or property damage.

18-CD19D7-13

|nsta||er's
GENERAL
The manufacturer
assumes no responsibility
for equipment
installed in violation of any code or regulation.
It is recommended
that Manual J of the Air Conditioning
Contractors Association (ACCA) or A.R.I. 230 be followed in
estimating
heating requirements.
When estimating
heating
requirements
for installation
at Altitudes above 2000 ft.,
remember the gas input must be reduced (See GAS INPUT
ADJUSTMENT).

Contents
Installation instructions
General
Location And Clearances
Outline Drawings
Upflow Installation
Downflow Installation
Horizontal Installation

Material
in this shipment
has been inspected
at the
factory
and released
to the transportation
agency
without
known damage.
Inspect
exterior
of carton
for
evidence
of rough handling
in shipment.
Unpack
carefully
after moving equipment
to approximate
location.
If damage
to contents
is found, report the
damage
immediately
to the delivering
agency.
Codes and local utility requirements
governing the installation of gas fired equipment,
wiring, plumbing, and flue
connections must be adhered to. In the absence of local
codes, the installation
must conform with the National Fuel
Gas Code ANSI Z223.1 "latest edition" or CAN/CGA B149
Installation
Codes. The latest code may be obtained from the
American Gas Association Laboratories,
8501 E. Pleasant
Valley Rd., Cleveland, Ohio 44131.
These furnaces have been classified as Fan Assisted Combustion system CATEGORY I furnaces as required by
ANSI Z21.47 "latest edition" and CAN/CGA 2.3. Therefore
they do not require any special provisions for venting other
than what is indicated in these instructions.
(Category I
defined on page 13).
These furnaces
may be twinned.
They shall have
common returns
with equal pressure
drops or ducts
with equivalent
lengths and sizes. See Field Wiring
Diagrams
for Twinning
on page 16 for proper
hookup.

Guide

Air For Combustion And Ventilation
Duct Connections
Return Air Filters
General Venting Instructions
Venting Into A Masonry Chimney
Electrical Connections
Field Wiring Diagrams
Twinning Connection Diagrams
Gas Piping
Sequence Of Operation

Start-up

And Adjustment

Preliminary Inspections
Combustion And Input Check
High Altitude Derate
Lighting Instructions
Controls And Safety Switch Adjustment

Abnormal

Conditions

IFC Error Flash Codes
To prevent shortening its service life, the furnace should
not be used as a "Construction
Heater" during the finishing
phases of construction. The low return air temperatures
can lead to the formation of condensate even though this is
a non-condensing
model. Condensate in the presence of
chlorides and fluorides from paint, varnish stains, adhesives, cleaning compounds, and cement create a corrosive
condition which may cause rapid deterioration of the heat
exchanger.

These furnaces are not approved or intended for installation in manufactured (mobile) housing, trailers, or recreational vehicles. Failure to follow this warning could result
in property damage, personal injury, or death.

Do not install the furnace
atmosphere.

in a corrosive or contaminated

LOCATION AND CLEARANCES
The location of the furnace is normally selected by the
architect, the builder, or the installer.
However, before the
furnace is moved into place, be sure to consider the following
requirements:
1. Is the location selected as near the chimney or vent and
as centralized for heat distribution
as practical?

18-CD19D7-13

Do all clearances between the furnace
equal or exceed the minimums stated
on the Outline Drawings.

and enclosure
in Clearance Table

3. Is there sufficient space for servicing the furnace and
other equipment?
A minimum of 24 inches front accessibility to the furnace must be provided. Any access door
or panel must permit removal of the largest component.
4. Are there at least 3 inches of clearance between the
furnace combustion air openings in the front panel and
any closed panel or door provided?
5. Are the ventilation
and combustion air openings large
enough and will they remain unobstructed?
If outside
air is used, are the openings set above the highest snow
accumulation
level? (See the Air for Combustion and
Ventilation
section)
6,

Allow sufficient height in supply plenum above the
furnace to provide for cooling coil installation,
if the
cooling coil is not installed at the time of this furnace
installation.

A furnace shall be installed
protected from water.

so electrical

components

are

8. If the furnace is installed in a residential
garage,
it
must be installed so that the burners, and the ignition
source are located not less than 18 inches above the floor
and the furnace must be located or protected to avoid
physical damage from vehicles.
3

*UD-C-K

_S/8

Ou"rLINE

DRAWING

(ALL DIMENSIONS ARE IN INCHES)
2
DIM

m
m

"C"

,,,,
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1 .................

_< F,,'S 4N()CI< Otl
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(Or,:',l
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5/8

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(A
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mill

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i

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,

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8

_
/

DIM

"A"

-'-

MODEL

DIM

"A"

DIM

"B"

DIM

"C"

DIM

MINIMUMCLEARANCETO COMBUSTIBLEMATERIALS

°D °

UPFLOW CLOS_[
LEFI SiDE
@i@l!i SIDE
FLUE

*UD040C924,*
*UD040C930_

DIM "O"

i,1

i/2'

9 5/8'

i/4

13 I

_Ui)060C92,1_*

0 IN
_O IN
ii6 IN

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=3 iN
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*UD0606936,
_UD080C924_÷

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*UD080C948_*
_UDiOOC936_
_23

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_UDiOOC945÷*

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IN

!iOIE 2}
B/,C_
SIDtS

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_U}080C960_
*UDiOOC948**
÷UDiOOC960*÷
*UDi20C954_*

8i"

i3i,,16"

193/4"

24i/2'

i55'16"

23_/4'

i9Ji2

_gD[OOC9i2_*
*UDi20C960*_
*UDi40C960.*

,co
0
CO

PRFIX
SIi_F IX

t1[
R MAY B
,s" OR ]'
iEi iERS _,I/,Y ii(i
"'I'_ (0 iHROU6_

23"

iOR
4 I/8
C,SUINiJiS 3 WHEN SiNgti
W,_il. vENT PIPE IS USED
WNEN i4 Ji2"
O\Bi_iETS
(Ati
_UDO40_ ,
_tJDC,4OR , _UDO60C , /_D _UDC,eOR936) /,RE
iNSTAi[ED
iN /_ IIORiZO_'iTAI
POSiTIO_
AND A
SiNglE
W;i[
VENT PiPE
JS USED, A 6 INCH
¢i E/,R&NCE _UST BE 5UPPi lED BETWEE_
TiiE ,'[NT _iPE _r'aD COMBUSTi81 r FIOORIN6
N()TFS:
i) MiNiM@M CLLARAHCE [0 FRONI ON
_UDi46ii960
AND _UDI40C960
i8 6 iNCiiUS
2) _A¥ BE iNS]ALLED
O_ ¢OMUUS_i@LL
I[OOR Wil[_
_YP( B i VEH; iS USeD

From Dwg. 21C341699
OO

Rev. 4

,co

*DD-C-F OUTLINE DRAWING

0
E1

5/8

(ALL DIMENSIONS ARE IN INCHES)

INET
A

DIM "C"

..................... ELNE
o

OPENING

MINIMUMCLEARANCE TO COMBUSTIBLEMATERIALS

..........
;2:0-

DOWNFLOW CLOSET
SIDES
5_ IN
W/SINGlE
WAlL VENI
0 IN
W/TYPE
PLUF
6
IN
W/SINGlE
WAlL VENT - I IN
W/TYPE
FRONT
6
IN
BACK
I IN
RIONT SIDE ONlY FOR 145"
CABINETS,
0 IN
TO LEFI
SIDE
0 IN
FOR REMAINING
CAB!NE7
SIZES
(17 5",
210 <', 24 5")

5/8

HORIZONTAL CLOSET tFLU5 DIICHAROE LEFTi
TOP
3_ IN
WISING{[
WAIL VENT
FLUE
6
IN
W/SINGlE
WAlL VENT
FBONI
6
IN
BACK
3 IN
TOP ON!Y FOR 145 '_ CABINETS
2 IN
FOR RENAINING
CABINET
SIZES
(175",
210
<', 245")

SIDE PANEL ¢U]OU1
HORIZONTAL VENTING
]NROUGN CABINEI

_24-1/2
k

5
7]

T
29

HOR!gON
lOP
FLUE
FRONT

P I/8

.1_11 .........

r
20

2
I

IN
W/TYPE B I VENT
IN
W/[YPE 8-1
VENT
SLOES
I IN

HORIXONTA_QSET
|FLUE D!$CHARGERIGHTI
TOP
8
IN
WlSINGL[
WALL VENT
FLUE
6
IN
WlSINGL[
WALL VENT
I IN
W/TYPE B I VENT
FBONI
6
IN
BACK
3 IN
SLOES
I IN
FOl:/ !NSTALLATION
ON COMBUS!IBLE
FLOORING
ONLY
WILES 8-1
VENT CONNECTOR IS USED

......................................................................
• .....

B I VENT
B-I
VENT

!/4

HQ_ONTAL
TOP
FLUE
ERONI

5_ IN
W/SINGLE
WALL VEN/
6
IN
W/SINGLE
WALL VENT
18
IN
BACK
0 IN
TOP ONLY FOR 145 <' CABINETS
l IN
_OR REMA!NING
CABINE]
SIZES
(175",
210",
245")
AL_OV_ (FLU5 PI@¢HARQE
_GHT)
I
IN
WISING{[
WAkL VENT
6
!N
W/SINGlE
WAlL VENI
18
!N
BACK
0 IN

I
I

IN
W/TYPE B-I
IN
W/TYPE B-I
SIDES
O IN

VENT
VENT

IN
W/TYPE B I VENT
S!OES
0 IN

\-\

;
\

_11/2
HOLE
GAS CONNECTION

2 1/16

....... DIM "A" ......

I/2
¢
_28

t
DIM "D"

1/2

OUTLET

3/4 _
3/4 ......

/2
KNOCK OUT _
GAS CONNZC ON
(ALI RNAT )

19 9/16 ............7 3/4_

..............

MODEL

*DDO40C924F
*DDO60C924F
*DDO60C936F

14-1/4"

9-5/8"

13-1/4"

13"

*DDO80C936F
*DDO80C945F
*DD100C945F

17-1/2"

9-5/8"

16-1/4"

16"

*DD100C948F
*DD100C954F
*DD120C954F

21"

13-1/16"

19-3/4"

19-1/2"

*DD120C960F
*DD140C960F

24-1/2"

15-5/16"

23-1/4"

23"

m
m

* - First letter may be "A" or "T"
Ol

_1/8
KNOCK OUI
[{EC[R ICAL
CONNECTION
(ALTERNATE)

mll

From Dwg. 21C341700

Sh. 1 Rev. 0

#,,

iiiiiiiii

|nstaIIer's
UPFLOW

Guide

INSTALLATION

Standoffs
and
with the cased

TABLE

screws (See Figure
coils for attachment

clearance
alignment
per and drill screws
flange.
The standoff

i on page 6) are included
to the furnace.
There are

holes near the bottom
of the coil wrapare used to engage
the furnace
top
is inserted
into the cabinet
alignment

hole. The drill screws
are inserted
through
the standoffs
then
screwed
into the furnace
flange.
The coil is always
placed
downstream
of the furnace
airflow.
These instructions
apply
iliiiiiiiiiiiili]i
iii isiiii]ili
only if the coil
on top of an upflow furnace.

iiiiiiiiiiii

STANDOFFS

(4)

DRILL SCREWS

(4)

FOR VERTICAL
iNSTALLATiONS:

SIDES)

STANDOFFS
(BOTH

CABINET
WIDTH

RETURN
DUCT WIDTH

14-I/2"

13-1/4"

13-5/8"

20-1/8"

12-5/8"

19-3/8"

16-1/4"

16-5/8"

20-1/8"

15-5/8"

19-3/8"

19-3/4"

20-1/8"

19-1/8"

19-3/8"

23-1/4"

23-5/8"

20-1/8"

22-5/8"

19-3/8"

17-I/2"
21"
24-I/2"

FLOOR OPENING
"A ....
B ....

HORIZONTAL INSTALLATION
The coil and furnace must be fully supported
the horizontal position.

SIDES)

@ SUS-BASE
_,111
SiDE --_

FLANGE
(BENT

ONLY

INSTALLATION

Do not install the furnace directly on carpeting, tile or other
combustible
material other than wood flooring. For vertical
downflow application, subbase (BAYBASE205) must be
used between the furnace and combustible flooring. When
the downflow furnace is installed vertically with a cased
coil, a subbase is not required.

CABINET

when used in

CASED COIL CONNECTION
BRACKET FOR DOWNFLOW
FURNACE IN HORIZONTAL

DOWNFLOW

PLENUM OPENING
C ....
D"

Three brackets (with screws) are included with downflow
furnaces for installation
to stabilize and secure the furnace
and TXC cased coil in the horizontal
position.
See Figure 4.
The coil is placed downstream
of the furnace, with the apex of
the coil pointing in the direction of the airflow for horizontal
installation.
The cased coil is secured to the furnace and
both the furnace and the cased coil must be properly supported. The brackets mount using the rear screws on the coil
case and use the screws provided to secure the bracket to the
furnace. The remaining bracket is placed as close to center as
possible (horizontally)
between the coil case front and the
furnace bottom channel (for downflow/horizontal
furnace).
Use four of the screws provided to secure the bracket.

SCREWS
(BOTH

SUB-BASE
FLANGE

(BENT

UP) y

SUB-_

UP)

This furnace may be installed in an attic or crawl space in
the horizontal position by placing the furnace on the left or
right side (as viewed from the front in the upright position).
The horizontal furnace installation
in an attic should be on a
service platform large enough to allow for proper clearances
on all sides and service access to the front of the furnace (See
Clearance Table on Outline Drawings and Figure 5).
If the furnace is suspended using perforated
steel strap
(plumber's
strap), it must be supported at all four corners
and in the middle at the front of the furnace. The forward
most screw on the side of the furnace may be used to connect
the strapping (See Figure 6). Line contact is only permissible
between lines formed by the intersection
of the top and two
sides of the furnace casing and the building joists, studs, or
framing.

_//

Required floor opening: (DOWNFLOW)
See Figure
2 and Table 1
m

_(width)
(depth)

I
4.

1
C

TYPICAL ATTIC PLATFORM INSTALLATION
(UPFLOW/HORIZONTAL FURNACE SHOWN)
6

18-CD19D7-13

|nstaI|er's
A cutout is provided on both sides of the downflow furnace
cabinet to allow a 90 ° elbow to be attached inside the cabinet
and the vent piping to connect there. In horizontal, the
downflow furnace may be vented through the top of the
cabinet if needed. In vertical configuration,
the downflow
furnace may be vented using the side cabinet cutouts. This
venting configuration
could be used if an electronic air
cleaner is installed.
When the downflow
furnace
is vented through
the left
side of the furnace
cabinet
in horizontal
or vertical
configuration,
Type B vent pipe must be used within
the cabinet.

CONFINED
LESS THAN 50 CU. FT.
PER 1000 BTU/HR. INPUT
ALL EQUIP INSTALLED

Confined spaces are installations
with less than 50 cu. ft. of
space per 1000 BUT/hr input from all equipment
installed.
Air for combustion and ventilation
requirements
can be
supplied from inside the building as in Figure 9 or from the
outdoors, as in Figure 10.
1.

All air from inside the building as in Figure 9: The
confined space shall be provided with two permanent
openings communicating
directly with an additional
room(s) of sufficient volume so that the combined volume
of all spaces meets the criteria for an unconfined space.
The total input of all gas utilization
equipment installed
in the combined space shall be considered in making this
determination.
Refer to Table 3, for minimum open
areas required.

All air from outdoors as in Figure 10: The confined space
shall be provided with two permanent
openings, one
commencing within 12 inches of the top and one commencing within 12 inches of the bottom of the enclosure.
The openings shall communicate
directly, or by ducts,
with the outdoors or spaces (crawl or attic) that freely
communicate
with the outdoors.
Refer to Table 3, for
minimum open areas required.

The following types of installations
will require
use of
OUTDOOR AIR for combustion, due to chemical exposures:
* Commercial buildings
* Buildings with indoor pools
* Furnaces installed in commercial laundry rooms
* Furnaces installed in hobby or craft rooms
* Furnaces installed near chemical storage areas.

TYPICAL SUSPENDED INSTALLATION
(UPFLOW/HORIZONTAL FURNACE SHOWN)
AIR FOR COMBUSTION AND VENTiLATiON
Adequate flow of combustion and ventilating
air must not be
obstructed from reaching the furnace. Air openings provided
in the furnace casing must be kept free of obstructions
which
restrict the flow of air. Airflow restrictions
aft_ct the efficiency and safe operation of the furnace.
Keep this in mind
should you choose to remodel or change the area which
contains your furnace. Furnaces
must have a free flow of air
for proper performance.
Provisions for combustion and ventilation
air shall be made
in accordance with '=latest edition" of Section 5.3, Air for
Combustion and Ventilation,
of the National Fuel Gas Code,
ANSI Z223.1, or Sections 7.2, 7.3 or 7.4 of CAN/CGA B149
Installation
Codes, and applicable provisions of the local
building codes. Special conditions created by mechanical
exhausting
of air and fireplaces must be considered to avoid
unsatisfactory
furnace operation.
Furnace locations may be in ==confined space" or ==unconfined
space". Unconfined
space is defined in Table 2 and Figure 7.
These spaces may have adequate
air by infiltration
to
provide air for combustion, ventilation,
and dilution of flue
gases. Buildings with tight construction
(for example,
weather stripping, heavily insulated, caulked, vapor barrier,
etc.), may need additional air provided as described for
confined space.

UNCONFINED
NO

50 CU. FT. OR MORE
PER 1000 BTU/HR. INPUT
ALL EQUIP. INSTALLED

DOORS

FURNACE

18-CD19D7-13

WATER

CLOTHES

HEATER

DR'fEn

Guide

Exposure to the following substances in the combustion
air supply will also reqmre OUTDOOR AIR for combustion:
* Permanent
wave solutions
* Chlorinated
waxes and cleaners
* Chlorine based swimming pool chemicals
* Water softening chemicals
* Deicing salts or chemicals
* Carbon Tetrachloride
* Halogen type refrigerants
* Cleaning solvents (such as perchloroethylene)
* Printing inks, paint removers, varnish, etc.
* Hydrochloric acid
* Cements and glues
* Antistatic fabric softeners for clothes dryers
* Masonry acid washing materials
TABLE 2
MINIMUM AREA IN SQUARE FEET FOR
UNCONFINED
SPACE INSTALLATIONS
FURNACE MAXIMUM
BTUH l INPUT RATING

WITH 8 FOOT CEILING
MINIMUM AREA IN SQUARE FEET
OF UNCONFINED SPACE

40,000
60,000
80,000
100,000
120,000
140,000

25O
375
500
625
750
875
7

|nsta||er's

Guide

TABLE 3
MINIMUM FREE AREA IN SQUARE INCHES
EACH OPENING FURNACE ONLY)
Furnace
Maximum
BTUH/INPUT

Air From Outside
Air From
Inside

Rating
lOO
lOO
lOO
lOO
12o
14o

40,000
60,000
80,000
100,000
120,000
140,000

iiiiiiiiiiii

CONFINED

SPACE

AIR FROM

Vertical
Duct

Horizontal
Duct

lO
15
20
25
30
35

20
30
40
50
60
70

_-_

iNSIDE BUILDING

PERMANENT
OPENINGS

CONFINED

Central furnaces, -when used in connection with cooling units,
shall be installed in parallel or on the upstream side of the
cooling units to avoid condensation
in the heating element,
unless the furnace has been specifically approved for downstream installation.
With a parallel flow arrangement,
the
dampers or other means used to control flow of air shall be
adequate to prevent 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 full
heat or cool position.
On any job, flexible connections of nonflammable
material
may be used for return air and discharge connections to
prevent transmission
of vibration.
Though these units have
been specifically designed for quiet, vibration free operation,
air ducts can act as sounding boards and could, if poorly
installed, amplify the slightest vibration to the annoyance
level.

SPACE

DUCT CONNECTIONS
Air duct systems should be installed in accordance with
standards
for air conditioning systems, National Fire Protection Association Pamphlet No. 90. They should be sized in
accordance with ACCA Manual D or whichever is applicable.
Check on controls to make certain they are correct for the
electrical supply.

When the furnace is located in a utility room adjacent to the
living area, the system should be carefully designed with
returns which minimize noise transmission
through the
return air grille. Although these winter air conditioners
are
designed with large blowers operating at moderate speeds,
any blower moving a high volume of air will produce audible
noise which could be objectionable when the unit is located
very close to a living area. It is often advisable to route the
return air ducts under the floor or through the attic. Such
design permits the installation
of air return remote from the
living area (i.e. central hall).

SPACE

AiR FROM OUTDOORS

SPACE

OUTLET

When the furnace is installed so that
air circulated by the furnace to areas
containing the furnace, the return air
by a duct(s) sealed to the furnace and
space containing the furnace.
CONFINED

Minimum
return
furnace
is 50 ° F.

SPACE

AiR FROM VENTILATED

ATTIC/CRAWL

SPACE
TO OUTDOORS
TTIC
LOUVERS

AIR

temperature"

for the

Where there is no complete return duct system, the return
connection must be run full size from the furnace to a location
outside the utility room, basement, attic, or crawl space.
DO NOT install
_rnace
cabinet.

_-.OUTLET
CONFINED

air "entering

the supply ducts carry
outside the space
shall also be handled
terminating
outside the

return

air through

the back of the

SPACE

ALTERNATE

INLET

RETURN AIR DUCT CONNECTION

INLET

AIR

A_R

DUCT

CONFINED

SPACE

AIR FROM
TO OUTDOORS

NOTE:
On upfiow 5 or 6 ton airflow models, if the airflow requirement exceeds 1800 CFM, these models will require filters
on both sides; OR I side and the bottom; OR just the
bottom.
All return air duct systems
return air filters.
1. Set the furnace

should provide

for installation

in place.

OUTLET
CONFINED

2. For side return installations
on upflow models, remove
the insulation around the opening in the blower compartment.

SPACE

tNLET
AIR

DUCT

18-CD19D7-13

|nsta||er's
3. The side panels on upflow furnaces include locating
notches which may be used as guides for cutting an
opening for return air. Refer to Figure 12 and the
outline drawing on page 3 for duct connection dimensions for various furnaces.

Close coupled (less than 36") return (filter directly
beneath bottom side return) is not recommended
due to
noise considerations.
Downflow
Furnaces:
Brackets are factory
mount filters in the return air duct work.

4. Ifa 3/4" flange is to be used for attaching the air inlet
duct, add to cut where indicated
by solid lines in
Figure 12. Cut corners diagonally and bend outward to
form flange.

5. If flanges are not required, and a filter flame is installed,
cut along knockout guidelines.
6. Upflow furnaces:
a filter rack is fhctory supplied for
bottom or side return.
Use the filter rack on either side
or on the bottom if the filter is to be used within the
furnace cabinet.
When the upflow furnace is installed in the horizontal
right or left application
and a return duct is attached to
the top side as shown in Figure 11, remove the filter
from the furnace and install in a remote location.

supplied

Connect the duct work to the furnace.
See Outline
Drawing for supply and return duct size and location.
Flexible duct connectors are recommended
to connect
both supply and return air ducts to the furnace.
If only the front of the furnace is accessible, it is recommended that both supply and return air plenums are
removable.
When replacing a furnace, old duct work should be
cleaned out. Thin cloths should be placed over the
registers and the furnace fan should be run for 10 minutes. Don't forget to remove the cloths before you start
the furnace.

RETURN AiR FILTERS
TYPICAL UPFLOW RETURN AIR FILTER INSTALLATIONS
Filters are fhctory supplied for these furnaces.
These furnaces require high velocity type air filters. The filters may be
located within the furnace blower compartment
for UPFLOW
furnaces in either a BOTTOM or SIDE (left side or right side)
return air inlet. Some filters may need to be trimmed for
side or bottom filter use.

Do not install the filter in the return duct directly above the
furnace in horizontal applications. Install the filter remotely.
Installing the filter directly above the furnace in horizontal
applications may cause property damage, serious injury or
death.

NOTE:
On upflow 5 or 6 ton airflow models, if the airflow requirement exceeds 1800 CFM, these models will require filters
on both sides; OR I side and the bottom; OR just the
bottom.

TO PREVENT INJURY OR DEATH DUE TO CONTACT
WITH MOVING PARTS, TURN THE POWER TO THE
FURNACE OFF BEFORE SERVICING FILTERS.
Do not install the filter in the return duct directly
the furnace in horizontal applications.

Guide

above
LOCATING
NOTCHES
PROVIDED
FOR SIDE
RETURN
CUTOUT

When the upflow furnace is installed in the horizontal
right or left application
and a close coupled (less than
36") return duct is attached to the bottom side of the
furnace as shown in Figure 11, securely attach a 1/2"
mesh metal hardware
cloth protective screen to the
inside bottom of the filter grill to prevent
personal
injury from contacting
moving
parts when reaching into the return
opening
to replace
the filter.

_" -.,.

CUT OUT
FOR
I_ / SIDE
FILTER

I
/
_.

"
FRONT
of Furnace

*SEE OUTLINE DRAWING

REMOVE
FILTER FROM UPFLOW
FURNACE
WHEN RETURN DUCT IS
ATTACHED
TO FURNACE
TOP SIDE
(HORIZONTAL
LEFT OR RIGHT
APPLICATIONS)
AS SHOWN.

IHBDDDDB_DB
DBDB
IDDDBDB_BB
DDDDB
/DDDDDDBBID
BDDD
UDDBBHHH_BDH
BB_
IDD_DIDIDDDDD
DD
IDHHD_DI_UHDH
D_

o
4II

Close coupled (less than 36")
return
(filter not
directly
beneath
side return)
recommended

The upflow furnace blower door has a hinge at the bottom
which allows the door to tilt forward for filter replacement
without the door being removed. The furnace filter in the
bottom or side configuration
can be removed by simply
turning the two latches on the blower door and tilting the
door forward.
The filter rails are spring loaded for automatic adjustment
allow standard size, locally obtainable replacement
filters.
The filter rack itself slides to adjust to the required width
needed for bottom or side return.

I _
bottom
due to

_xx****_**L_ _=

noise considerations.
If used, securely
_
attach 1/2" mesh metal hardware cloth
protective screen to the inside bottom of
filter grill.

18-CD19D7-13

|nsta||er's

Guide
TABLE 4

UPFLOW FURNACE RETURN AIR FILTERS
CABINET
WIDTH

QTY*

CABINET
BOTTOM FILTER

CABINET
SIDE FILTER

14" X 25" X 1"

17-1/2" X 25" X 1"

14-1/2"

17-1/2"

17" X 25" X 1"

17-1/2" X 25" X 1"

21"

20" X 25" X 1"

17-1/2" X 25" X 1"

24-1/2"

24" X 25" X 1"

17-1/2" X 25" X 1"

*NOTE - On 5 ton airflow models, if the airflow
requirement exceeds 1800 CFM, these models will
require filters on both sides; OR 1 side andthe bottom;
OR just the bottom.

iiiiiiiiiiii

NOTE:
The narrow 14.5" width furnace cabinet prevents use of the
filter rack for right side return. The 14.5" width furnace
models will ship with both an adjustable filter rack for
bottom or left and filter clips for right side return air applications. The filter clips are the same as previously used on
all upfiow furnaces and will be shipped in a plastic bag
attached to the control platform.
The furnace cabinet has
dimples for location of the alternate furnace clips. Pre-drlll
clearance holes and then attach filter clips with the screws
provided.
The filter clip with the leaf spring mounts in the
rear of the cabinet
BOTTOM FILTER RACK INSTALLATION
With the filter removed, the filter rack is compressed
and
then inserted into the bottom of the furnace.
The retaining
screw/pin on each side inserts into engagement
holes at the
bottom of the furnace cabinet side.
NOTE:
Remove the bottom front channel to install the filter rack in
the 14=1/2" width cabinet furnaces.

ENGAGEMENT
HOLE DETAIL
(Typicalbothsides
and blowerdeck)

Blower Door Hinge and Bottom Filter Rack Installation
(_

FILTER
RACK

®
-'_

Cabinet
Furnace
Side

RAILS
_- SPRINGS

AUTOMATIC
ADJUSTMENT

Filter Rack Assembly

Filter Rack
Retaining
Screw/Pin

RETAINING
PIN
(Both Sides)

Filter
Rack

Engagement
Hole
For Filter Rack
Installation
With
Bottom
Return

18-CD19D7-13

|nsta||er's
Cabinet Width

Left Side Bottom

Right Side

17.5

24.5

1. UD060C/R936K0 has 10x7 blower which requires use of alternate
filter clips for left side filter. "KI" and later use the filter rack.
2. Remove bottom front channel to install or reposition filter rack
X - All Models
FILTER RACK INSTALLATION FOR SIDE RETURN AIR
ON UPFLOW FURNACES (Left or Right)
If side air return is desired, it is necessary to move the filter
rack from the bottom of the furnace and reinstall it on the
side. The following instructions
should be used:
a. Open or remove

SIDE
CUTOUT

RETAINING
PIN

the blower door.

c. Compress the filter rack to disengage the retaining
pins/screws from the furnace sides and slide the filter
rack out.
Leave the bottom

M_er the side cutout is made following the directions
in the "Return Air Duct Connections"
section on
pages 8 and 9; compress the filter rack and reinstall
in the side of the furnace. Confirm that the upper
retaining pin!screw locks into the engagement
hole in
the blower deck and the lower pin/screw rests against
the side of the bottom panel. See Figures 14 - 19.

panel in place.

the furnace

BOTTOM

Furnace
_ m
Cabinet '=']_1

Side

Engagement
For Filter Rack
Hole
Installation With
Bottom

Return

RACK

BOTTOM
PANEL
INSTALLED

RAILS

Typical Upflow Left Side Return Filter Rack Installation

(Both S_I

b. Remove the filter.

f. Reinstall

Guide

filter on the side.

ENGAGEMENT
Filter Rack
Retaining
Screw/Pin

Filter

!_I

Rack

Typical

Upflow Right Side Return Filter Rack Installation

Bottom Panel

®
Engagement

BLOWER
DECK

Hole

For Filter Rack
Installation
With
Side Return

Fu mace
B_ower
Deck

_o/
Furnace
Cabinet
Side
NFilter
Retaining
Screw/Pin

18-CD19D7-13

Rack
Assembly

Typical Filters of Upflow in Horizontal
11

|nstaIIer's

Guide

RETURN AIR FILTERS FOR UPFLOW FURNACE
IN HORIZONTAL CONFIGURATION
When the Upflow Furnace is installed in a horizontal configuration, the filter must never be installed inside or outside
the cabinet directly above the blower assembly. See Figure
11. Remote filter grilles may be used for homeowner convenience or the filters may be installed in the duct work
upstream of the furnace.
See Figure 11 and 21.
BLOWER DOOR/HINGE REMOVAL
If clearance or other problems create a problem in using the
tilting door, the blower door hinge may be removed without
creating any problems with the seal of the furnace.
To
remove the blower door, tilt the door forward 2 to 3 inches
and pull up. To remove the tilt feature, simply remove the
lower hinge as shown in Figure 22. The bottom of the blower
door will catch in the bottom of the furnace front channel for
door replacement.

INSTALLING THE FILTER
The filter may need to be cut to fit the unit depending
location of the return air filter.

on the

A score line and the words "CUT HERE" are located on the
end of the filter. If your application
requires cutting the
filter, do so as indicted by the score mark.

RETURN AIR

UNIT
SIZE

BOTTOM

SIDE

14-1/2"

CUT ON LINE

DO NOT CUT

17-1/2"

DO NOT CUT

21"

DO NOT CUT

CUT ON LINE

24-1/2"

DO NOT CUT

CUT ON LINE

TYPICAL DOWNFLOW FURNACE
RETURN AIR FILTER INSTALLATIONS

Door Hinge Removed
ALTERNATE UPFLOW
FILTER CLIP / BRACKET INSTALLATION
1. Determine
the location to be used. The furnace cabinet
has dimples for location of the alternate furnace clips
(Side return only). Pre-drill clearance holes with a
3/16" drill. Bottom return holes are pre-drilled.
2. Install the clips in front and rear of the desired location
using the screws provided. The filter clip with the leaf
spring mounts in the rear of the cabinet.

ALTERNATE FILTER
CLIPS LOCATION

Two filters are factory supplied for each downflow furnace.
These furnaces require high velocity type air filters. Downflow furnace filters must be located outside the furnace
cabinet. Typical installations
are shown in Figure 24.
Tables 5 and 6 provide information
for installation
of the
filter retaining brackets shipped with downflow furnaces.

18-CD19D7-13

|nsta||er's
TABLE 5
CABINET
WIDTH

FILTER
SIZE

FILTER BRACKET
LOCATION *

14-1/2"

2 - 14X20X1

12-7/8"

17-1/2"

2 - 16X20X1

14-3/8"

21"

2 - 16X20X1

13-1/8"

24-1/2"

2 - 16X20X1

11-5/8"

• Location

dimension

is from end of duct to the screw holes for the bracket.

TABLE 6
CABINET
WIDTH

RETURN
DUCT
WIDTH

FILTER ACCESS
OPENING DIMENSION "A"

FILTER ACCESS
OPENING DIMENSION "B"

14-1/2"

13-1/4"

12"

14"

17-1/2"

16-1/4"

15"

14"

21"

19-3/4"

19-1/2"

14"

24-1/2"

23-1/4"

22"

14"

GENERAL

CARBON

VENTING

Guide

VENT PIPING
These furnaces have been classified as Fan-Assisted
Combustion System, Category I furnaces under the "latest edition"
provisions of ANSI Z21.47 and CAN/CGA 2.3 standards.
Category I furnaces operate with a non-positive vent static
pressure and with a flue loss of not less than 17 percent.
NOTE:
ff desired, a side wall termination can be accomplished
through the use of an "add-on" draft inducer. The inducer
must be installed according to the inducer manufacturer's
instructions.
Set the barometric pressure relief to achieve
-0.02 inch water column.
NOTE: When the downflow furnace is vented through the
left side of the furnace cabinet using the provided cutout,
Type B vent piping must be used.
The furnace shall be connected to a factory built chimney
or vent complying with a recognized standard, or a masonry or concrete chimney lined with a lining material
acceptable to the authority having jurisdiction.

iNSTRUCTiONS

MONOXIDE POISONING

HAZARD

Furnace venting into an unlined masonry chimney or
concrete chimney is prohibited. Failure to follow this
warning could result in property damage, personal injury,
or death.
VENTING INTO A MASONRY CHIMNEY
If the chimney is oversized, the liner is inadequate,
or fluegas condensation
is a problem in your area, consider using
the chimney as a pathway or chase for type "B" vent or flexible vent liner. If flexible liner material is used, size the vent
using the "B" vent tables, then reduce the maximum capacity
by 20% (multiply 0.80 times the maximum capacity).
Masonry Chimney Kit BAYVENT800B may be used with
these furnaces (Upflow model furnaces
only) to allow
venting into a masonry chimney. Refer to the BAYVENT800B
Installer's
Guide for application
requirements.
Internal Masonry Chimneys
Venting of fan assisted appliances into a lined, internal
masonry chimney is allowed only if it is common vented with
at least one natural draft appliance; OR, if the chimney is
lined with type "B", double wall vent or suitable flexible liner
material (See Table 7).

4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance not
connected to the venting system. Turn on any exhaust
fans, such as range hoods and bathroom exhausts, so
they are operating at maximum speed. Do not operate
a summer exhaust fan.
6. Follow the lighting instructions. Place the appliance
being inspected into operation. Adjust the thermostat
so appliance is operating continuously.
7. If improper venting is observed during any of the above
tests, the venting system must be corrected in
accordance with the National Fuel Gas Code,
ANSI Z221.1/NFPA 54 and/or CAN/CGA B149
Installation Codes.

The chimney liner must be thoroughly inspected to insure
no cracks or other potential areas for flue gas leaks are
present in the liner. Liner leaks will result in early deterio=
ration of the chimney.
Failure to follow this warning
ide poisoning or death.

could result in carbon monox=

NOTE:
The following section does not apply if BAYVENT8OOB
(Masonry Chimney Vent Kit) is used. All instructions
with
the kit must be followed.

8. After it has been determined that each appliance
connected to the venting system properly vents where
tested as outlined above, return doors, windows,
exhaust fans, fireplace dampers and any other gas-fired
burning appliance to their previous conditions of use.
18-CD19D7-13

|nsta||er's

Guide

TABLE 7
MASONRY CHIMNEY VENTING
Tile Lined Chimney

VERTICAL

WALL

Chimney Lining

Type Furnace

Internal

External

"B" Vent

Flexible
Metal Liner

Single Fan
Assist

Yes

Yes*

Fan Assist
+
Fan Assist

Yes

Yes*

Fan Assist
+
Natural

Yes

LISTED
CAP

LOWE ST DISC HARGE
OPENING

.if"
(
No

Yes

Yes*
ROOF

Flexible chimney liner size is determined by using the type "B" vent size for
the available BTUH input, then reducing the maximum capacity by 20%
(multiply maximum capacity times 0.80). The minimum capacity is the same
as shown in the "B" vent tables.

External Masonry Chimney
Venting of fan assisted appliances into external chimneys
(one or more walls exposed to outdoor temperatures),
requires the chimney be lined with type "B", double wall vent
or suitable flexible chimney liner material.
This applies in
all combinations
of common venting as well as for fan
assisted appliances vented alone.

CARBON MONOXIDE POISONING HAZARD
Failure to follow the installation instructions for the venting
system being placed into operation could result in carbon
monoxide poisoning or death.
The following installation
practices are recommended
to
minimize corrosion caused by condensation
of flue products
in the furnace and flue gas system.
1. Avoid an excessive number of bends.
2. Horizontal

runs should pitch upward

3. Horizontal

runs should be as short

at least 1/4" per foot.

5. When vent connections must pass through walls or
partitions of combustible material, a thimble must be
used and installed according to local codes.
6. Vent pipe through the roof should be extended
height determined
by National Fuel Gas Code
codes. It should be capped properly to prevent
water from entering the vent. Roof exit should
waterproofed.

to a
or local
rain
be

S X/z12

THE VENT TERMINATION SHOULO NOT BE_
LESS THAN 8 FT FROM A VERTICAL WALL

Where long periods of airflow are desired for comfort,
long fan cycles instead of continuous airflow.

use

9. Apply other good venting practices as stated in the
venting section of the National Fuel Gas Code
ANSI Z223.1 "latest edition".
10. Vent connectors
serving
appliance
vented by
natural
draft or non-positive
pressure
shall not be
connected
into any portion
of a mechanized
draft
system operating
under positive
pressure.
11. Horizontal pipe runs must be supported by hangers,
straps or other suitable material in intervals at a
minimum of every 3 feet of pipe.
12.

A furnace shall not be connected to a chimney or flue
serving a separate appliance designed to burn solid fuel.

13.

The flow area of the largest section of vertical vent or
chimney shall not exceed 7 times the smallest listed
appliance categorized vent area, flue collar area, or draft
hood outlet area unless designed in accordance with
approved engineering
methods.

as possible.

4. All vent pipe or connectors should be securely supported
and must be inserted into, but not beyond the inside wall
at the chimney vent.

PITCH

Maximum
Vent or Tile
Lined Chimney
Flow Area
"Drafthood
diameter.

outlet

diameter,

flue

collar

diameter,

or listed

_(_)2
4

appliance

categorized

vent

ELECTRICAL CONNECTIONS

The cabinet must have an uninterrupted or unbroken
ground according to National Electrical Code, ANSI/
NFPA 70 - "latest edition" and Canadian Electrical Code,
CSA C22.1 or local codes to minimize personal injury if an
electrical fault should occur. A failure to follow this warning could result in an electrical shock, fire, injury, or death.

7. Use type "B" double wall vent when vent pipe is routed
through cool spaces (below 60 ° F.).
TABLE 8

The integrated furnace control is polarity sensitive. The hot
leg of the 115 VAC power must be connected to the BLACK
field lead.

GAS VENT TERMINATION
ROOF

PITCH

MINIMUM

FLAT TO 7/12
OVER 7/12 TO 8/12

HEIGHT

1.0 FEET *
1.5 FEET

OVER
OVER

8/12 TO 9/12
9/12 TO 10/12

OVER
OVER
OVER

10/12
11/12
12/12

TO 11/12
TO 12/12
TO 14/12

2.0
2.5

OVER
OVER

14/12
16/12

TO 16/12
TO 18/12

6.0
7.0

FEET
FEET

OVER
OVER

18/12
20/12

TO 20/12
TO 22/12

7.5
8.0

FEET
FEET

* THIS

REQUIREMENT

COVERS

FEET
FEET

3.25 FEET
4.0 FEET
5.0 FEET

MOST

To prevent injury or death due to electrical shock or
contact with moving parts, lock unit disconnect switch in
the open position before servicing the unit. Failure to
follow this warning could result in electrical shock,
personal injury, or death.

INSTALLATIONS

18-CD19D7-13

|nsta||er's
Make wiring connections
to the unit as indicated
on
enclosed -wiring diagram. As with all gas appliances using
electrical power, this furnace shall be connected into a
permanently
live electric circuit. It is recommended
that it
be provided with a separate "circuit protection device" electric
circuit. The furnace must be electrically grounded in accordance with local codes or in the absence of local codes with
the National Electrical Code, ANSIfNFPA
70 "latest edition"
or Canadian Electrical Code, CSA C22.1, if an external
electrical source is utilized.

Guide

All field supplied wiring must conform with the temperature
limitation for Type T wire [63 ° F. (35 ° C)], when installed in
accordance with these instructions
and wiring diagrams
supplied with the furnace. A disconnecting
means must be
located within sight from, and readily accessible to, the
furnace.
Refer to the SERVICE FACTS literature
for unit wiring
diagrams in addition to the diagram inside the blower door.

FIELD WIRING DIAGRAM FOR 1 STAGE FURNACE
1 STAGE HEATING
USING A 1 STAGE HEATING THERMOSTAT
NO COOLING
T "SIAl"

FURNACE
SEE
-NOTE 7

NO!ES:
I,
2.
3
4.
5

rq
[]

[]

8E SURE POWER AGREES WITH EQUIPMENT NAMP[ATE(S)
lOW VOLTAGE (24V.
WIRING) TO BE NO. 18 A W G MIN..
GROUNDING Of EQUIPMENT MUSt COMPLY WlqH LOCAL CODES
SFP THERMOS/A1 NEAT AN]ICIPA[OR
PER UN![ WIRING DIAGRAM,
_HESE LEADS PROVIDE 115 V POWER J:OR CONNECTION 0!: E/FC1RON}C
CLEANER AND HUMIDIFIER MAX LOAD I 0 AMPS EACH
THIS CONNECTION IS ONLY USED EOR THERMOSTATS REQUIRING
CONNECTION TO THE 24 V POWER SUPPLY. (COMMON)
SEE ]WINNING CONNKC]ION DIAGRAMS FOR PROPER CONNEC]IONS
WHEN USING tHIS FEATURE

6,
7

AIR

,ll

SEE
[]

NOTE6

[]

[

{ NqP0['4[:N

60 HZ., POWEI_
SUPPLY PER
TO 115V1PH
LOCAL
CODES

v.
NE

V.
NE

iii

--L

=i_
=
L N

",/, RIN(

-N 7_E
D
" _;>WI _,
{
x

L FAC
,/ )r,,/,71:_

HUM SEE
NOTE
5

O_Y
I O

WH
EACESEE

_Ut<

J
=

From Dwg. 21 B341437

Rev. 1

FIELD WIRING DIAGRAM FOR 1 STAGE FURNACE
1 STAGE HEATING, 1 STAGE COOLING
USING A 1 STAGE HEATING, 1 STAGE COOLING THERMOSTAT
(OUTDOOR SECTION WITHOUT TRANSFORMER)
T "SPAT
--

FURNACE
SEE
-NOTE 7

L--.F;q
OUTDOOR
UNIT
(NOrnANSFORMER)

I
2
3
4
S

[]

NOTS:

SEE

NOTE 8

[]

[]
[]

BE SURE POWER AGREES W}]H EOUIPMEN1NAMPLA[E(S)
lOW VOLYAGE (24v.
WIRING) TO lIE NO. 18 A.W.G. MIN.
GROUND}NG OF EQUIPMENT MUST COMPLY WITH lOCAL CODES
SET TNERMQSTAT HEAT ANTICIPATOR PER UN}T W}RING DIAGRAM
THESE LEADS PROVIDE 1!5 V POWER FOR CONNFCFION OF ELECTRONIC AIR
CLEANER AND NUM}DIFIER MAX lOAD I0
AMPS EACH
tHIS CONNEC]ION IS ONlY USED FOR qHERMOSqA[S REQUIRING
CONNECT}ON TO TIlE 24 V POWER SUPPLY (COMMON)
SEE TW}NNING CONNFCTION DIAGRAMS FOR PROPER CONNECTIONS
WHEN USING THIS FEATURE
FHE "Y" /ERMIN}NA/
FROM IHE ]HERMOSFA/ MUST BE WIRED
TO THE "Y" TERM}NA[ OF THE FURNACE CONTRO! FOR PROPER BLOWER
OPERATION DURING COOL!NG

SEE

[]

INTER

[]

",,,_,71Ri_,G

v',

-'L

L ]NE

" "x f

,tt

i
i
i
i
i
i
i

CObPONE_,T
24

NOTE 6

N,',
1bE

PiE

',/. f

",iV :{11

L
LHN

"/V' ::i / N (
A

TO 115V 1PH.,
60 HZ., POWER
SUPPLYPER
LOCAL CODES

HUM SEE
NOTE5

9_,Y

(;

EAC
SEEI_=--=
NOTE5

18-CD19D7-13

From Dwg, 21B341436

Rev, 1

|nsta||er's

Guide

TWiNNiNG
These furnaces
furnaces
with

must be used. They shall have common returns with equal
pressure drops or ducts with equivalent lengths and sizes.
See Field Wiring Diagrams below for proper hookup.

may be twinned.
Twinning
requires
that two
the same configuration,
capacity,
and airflow

STAGE

HEAT

TWINNING CONNECTION
DIAGRAM
FOR TWINNING 1 STAGE FURNACES WITH
SINGLE WIRE TWINNING FEATURE
1 STAGE HEATING ONLY THERMOSTAT

ONLY
THERMOSTAT
(WITH

FAN SWITCH)

FURNACE

NO. 1

FURNACE
BLOWER
UNiT
WITH

UNiT

FROM

NO. 2

OPERATION

IS
NO

TWIN

/,0_

!7('+
_Us4_'4_ 5 !,!{',$7 sj POliRs)
rile 5At'{
i75{ ,¸ iL6
0/: CiTr, Ui

SYNCRONIZED
l ViA

SIGNALS

CONNECTION

i£S!_/
PAt,j_

MS'RE 2_7
_UR_MCE TRAt¢SFO,%IERS ARE
R' PHAS_ PRIOR 70 COMPLE7i_,G COIRTUTiOI, S,
CHECK VOLTAGL B_7#E£N 'R' _LRM/#AL5 Of
_ACH FURNAC_¸
if ¸ VOiTA6E
15 GReATeR 7f!AN
iOY , REYiTPS_ T_E _L _N R_ ,S_{O#_/,12Y i_AB$
ON ORE OF THL FUR_fACE TRA_SFOR£ERS
3

FO;st'iECT Oh t4/Y 8E _E@t' aED FOp
_L_C ITONIC i lL_@'OSMi
f

SEE NOTE 4

(Usifl

'7i

7XCEEOS DT s_yOSTAi d_/ sl #7

?HOW#¸ (DO _OT CORRECT W TO W)
iSOL47iON
R_LAY NO7 "TL_b_D /f 7HL 7HLRMOSTA7¸
C0#74C75 ARE RATIO AI¸ i OA O_ A_OV_
I
F-_-I

iiiiiiiiiiii

Rll

i
ISOLATION

iSOLATiONRELAY
(FIELD SUPPLIED)
SEE NOTE4

RELAY

SEE NOTE

N i EF:7 COvIF _ONEN

'A"]I:R NO

AL i*_,_V!!i_ fl'lR t,tG COt,F/_t'fb',7 iOt_,
Si
t_O; 4
2 4

',,/

----I

SEE NOTE 3

NE
24

--I

)

_" VV C_iNO

'<,",
NK
,/.

t
i'C TO_{Y
["Vv' R NG

From Dwg. 21B341422 Rev. 2

TWINNING
CONNECTION
DIAGRAM
FOR TWINNING
1 STAGE FURNACES
WITH
SINGLE
1 STAGE
OUTDOOR UNIT
WITH TRANSFORMER

1 STAGE
HEATING / COOLING
THERMOSTAT

WIRE TWINNING

HEAT / 1 STAGE
FURNACE

NO. 1

COOL

FEATURE
THERMOSTAT
FURNACE
BLOWER
UNIT

2 IS

#oin iii*R_C_S
TH S_UE MS/

NO. 2

OPERATION

#us
:

_ POi'/ R ,_ i_ou
OF CIRO/ T R,_RFt

SYNCRONIZ_O

WITH
UNIT
NO
1 VIA SIGNALS
FROM
_IN
CONNECTION

EAC

FURRAC

,'or

tS(}

A)r

REVERSE

_0_ TAGE

7F'E BL

,Itl,i

tR
R_

GREATER

ThAtV

SECO_@ARY

L£AD%

23'

',_

ooi i
.......

...........................

{FIELD
SURPUED}
ISOLATION
SEE NOTE RELAy
3

SEE NOTE 4

CORTACT5

(NO
TRANSFORMER)
OUTDOOR
UNIT

AR,_

){

RXTE_

R _Di9
4T

/OA

ifi_4OSlk_

A'_O_,E

COWNEEI)ON #AY _E R[OFIRED FOR £LFdTROR[{
_RERWOST47S

_ _T -_

OR R

RlL-ii
iSOLATION

RELAy

SEENOTE4

INTER

-COMPONENT

.........

----I

2 4
V.
11\
24

--I

%
ii
16

From

Dwg, 21B341423

WIRING

AL ERFAH WK_F6 {ON_ ,R,,/,T ON
S_ R0_ 4
p
,/,j

V.
/NI

_,
'

f',x"

F
{
',,"+'IR]

)
O

PACTO_{Y
RING

Rev, 2

18-CD19D7-13

|nsta||er's
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result in
serious injury, death or property damage.
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. A fire or
explosion may result causing property damage, personal
injury, or loss of life.

LEFT SiDE PiPiNG (STANDARD)

GAS PIPING
This unit is shipped standard for left side installation
of gas
piping, A piping knockout is also provided in the right side
for an alternate
piping arrangement.
The installation
of
piping shall be in accordance with piping codes and the
regulations
of the local gas company.
Pipe joint compound
must be resistant to the chemical reaction with liquefied
petroleum gases.
Refer to piping Table 9 for delivery sizes. Connect gas supply
to the unit, using a ground joint union and a manual shut-off
valve as shown in Figure 26. National codes require a
condensation
drip leg to be installed ahead of the controls as
shown in Figure 26.
The furnace and its individual shut-off valve must be disconnected from the gas supply piping system during any pressure
testing of that system at test pressures in excess of 1/2 psig.

The furnace must be isolated from the gas supply piping by
closing its individual manual shut-offvalve
during any
pressure testing of the gas supply piping system at test
pressures equal to or less than 1/2 psig.

GROUND_

UNION

Guide

JOINT

DRIP LEG -'-'"--"'_

NOTE:
Maximum pressure to the gas valve for natural gas is 13.8"
W.C. Minimum pressure is 5.0" W.C. Maximum pressure to
the gas valve for propane is 13.8" W.C. Minimum pressure
is 11.0" W.C.

£
_

AUTOMATIC GAS VALVE
WiTH MANUAL SHUTOFF

All gas fittings must be checked fi)r leaks using a soapy
solution befi)re lighting the [hrnace. DO NOT CHECK
WITH AN OPEN FLAME!

RIGHT SiDE PiPiNG (OPTIONAL)
I The following

warning

complies

with State of California

law, Proposition

65.

o
o

,_--t MANUAL MAIN
SHUTOFF VALVE

GROUND
UNION JOINT

Hazardous Gases!
Exposure to fuel substances or by-products of incomplete
fuel combustion is believed by the state of California to
cause cancer, birth defects, or other reproductive harm.
SEQUENCE OF OPERATION

_--_

DRIP LEG

AUTOMATIC GAS VALVE
WITH MANUAL SHUTOFF

TOP ViEW OF RIGHT SiDE PiPiNG

TO PREVENT AN EXPLOSION OR POSSIBLE INJURY,
DEATH AND EQUIPMENT DAMAGE, DO NOT STORE
COMBUSTIBLE MATERIALS, GASOLINE OR OTHER
FLAMMABLE VAPORS OR LIQUIDS NEAR THE UNIT.
18-CD19D7-13

Thermostat call for heat
R and W thermostat
contacts close signaling the control
module to run its self-check routine. After the control module
has verified that the pressure switch contacts are open and
the limit switch(es) contacts are closed, the draft blower will
be energized.
As the induced draft blower comes up to speed, the pressure
switch contacts will close and the ignitor warm up period will
begin. The ignitor will heat for approx. 20 seconds, then the
gas valve is energized to permit gas flow to the burners.
The
flame sensor confirms that ignition has been achieved within
the 6 second ignition trial period.
After the flame sensor confirms that ignition has been
achieved, the delay fan ON period (fixed at 45 seconds)
begins timing. After the delay of 45 seconds, the indoor
blower motor will be energized and will continue to run
during the heating cycle.
When the thermostat
is satisfied, R and W thermostat
contacts open, the gas valve will close, the flames will
extinguish, and the induced draft blower will be de-energized.
The indoor blower motor will continue to run for the fan off
period (fixed at 100 seconds), then will be de-energized by the
control module.

|nstaIIer's

Guide
For the gas valve model 36G, do not remove the pressure tap test screw. Using a 3/32" hex wrench, loosen
the pressure tap test screw one turn and install 5/16"
flexible tubing and a manometer
directly onto the
outlet pressure boss.

FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result in
serious injury, death or property damage.
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.
A fire or
explosion may result causing property damage, personal
injury, or loss of life.

START-UP AND ADJUSTMENT
PRELIMINARY INSPECTIONS
With gas and electrical
power
1. Duct connections
2. Filters
3. Venting

are properly

"OFF"
sealed

assembled

4. Blower door is in place

[

Turn knob on main gas valve within the unit to the "OFF"
position. Turn the external gas valve to "ON". Purge the air
from the gas lines. After purging, check all gas connections
for leaks with a soapy solution - DO NOT CHECK WITH
AN OPEN FLAME.
Allow 5 minutes for any gas that might
have escaped to dissipate.
LP Gas, being heavier than air,
may require forced ventilation.
Turn the knob on the gas
valve in the unit to the "ON" position.
COMBUSTION AND iNPUT CHECK
1. Make sure all gas appliances are off"except the furnace.
2. Clock the gas meter with the furnace operating (determine the dial rating of the meter) for one revolution.
3. Match the "Sec" column
with the time clocked.

in the gas flow (in cfh) Table 12

4. Read the "Flow" column opposite the number of seconds
clocked.
5,

Use the following factors if necessary_:
For 1 Cu. Ft. Dial Gas Flow CFH =
Chart Flow Reading

For 1/2 Cu. Ft. Dial Gas Flow CFH =
Chart Flow Reading

For 5 Cu. Ft. Dial Gas Flow CFH =
10X Chart Flow Reading

e. Turn the adjustment
nut clockwise to increase the gas
flow rate, and counter-clockwise
to decrease the gas
flow rate using a 3/32" hex wench.

g. Replace the regulator
tighten securely.

adjustment

screw cap and

h. Turn off all electrical

power to the system.

i. Remove the manometer
and flexible tubing. Remove
the barbed futting and replace the plug or tighten the
pressure test screw.
j,

Turn on electrical

power

to the system

and energize

valve.

k. Using a leak detection solution or soap suds, check for
leaks at plug or pressure boss screw.

Replace and/or tighten all plugs removed or loosened when
adjusting gas pressure. Leak check the fittings before
placing the furnace into regular service. Failure to follow
this warning could result in fire, explosion, or property
damage.
For LP gases, the final manifold pressure setting shall be
10.5" W.C. with an input of no more than the nameplate
rating and no less than 93% of the nameplate
rating, unless
the unit is derated for altitude.

TABLE 9
NATURAL GAS ONLY
+4

7. Changes can be made by adjusting the manifold pressure or changing orifices (orifice change may not always
be required). To adjust the manifold pressure:

d. Remove the regulator adjustment
screw cap on the
gas valve for manifold pressure adjustment.

Table 10 lists the main burner orifices shipped -with the
furnace.
If a change of orifices is required to correct the input
rate, refer to Table 11.

6. Multiply the final figure by the heating value of the gas
obtained from the utility company and compare to the
nameplate
rating. This must not exceed the nameplate
rating.

a. Turn off"all electrical

valve.

f. The final manifold pressure setting shall be 3.5" W.C.
with an input of no more than nameplate
rating and
no less than 93% of the nameplate
rating, unless the
unit is derated for high altitude.

are in place
is properly

c. Turn on system power and energize

power to the system.

Attach a manifold pressure gauge to the outlet pressure
tap marked "OUT PRESS TAP" on White-Rodgers
gas valve model 36F or boss marked "OUT P" on
White-Rodgers
gas valve model 36G. (See Figure 28
for White-Rodgers
gas valve model 36F and Figure 27
for White-Rodgers
gas valve model 36G.) For the gas
valve model 36F, measurement
requires removal of
the plug and installation
of a barbed fitting. Attach
flexible tubing and a manometer
to the barbed fitting.

TABLE OF CUBIC FEET PER HOUR OF GAS
FOR VARIOUS PIPE SIZES AND LENGTHS
PIPE
SIZE

LENGTH OF PIPE
30
40
50

1/2

132

3/4

278

190

152

130

115

105

520

350

285

245

215

195

180

1-1/4

1050

730

590

520

440

400

370

This table is based on pressure drop of 0.3 inch W.C. and 0.6 SP.GR. gas

18-CD19D7-13

|nsta||er's
TABLE 10
ORIFICE SIZES
INPUT
RATING
BTUH

NUMBER
OF
BURNERS

40,000
60,000
80,000

2
3
4

100,000
120,000

5
6

140,000

Guide

TABLE 12
GAS FLOW IN CUBIC FEET PER HOUR

MAIN BURNER ORIFICE
DRILL SIZE
NAT. GAS

LP GAS

45
45

56
56

45
45

56
56

45
45

56
56

TABLE 11
PART NUMBERS FOR REPLACEMENT ORIFICES
DRILL
SIZE

PART
NUMBER

DRILL
SIZE

PART
NUMBER

44
45
46
47
48
49
5O

ORF00501
O R F00644
ORF00909
ORF00910
ORF01099
ORF00503
ORF00493

54
55
56
57
58
59

ORF00555
ORF00693
ORF00907
ORF00908
ORF01338
ORF01339

HIGH ALTITUDE DERATE
Input ratings (BTUH) of these furnaces are based on sea
level operation and should not be changed at elevations up to
2,000 ft.
If the installation
is 2,000 ft. or above, the furnace input rate
(BTUH) shall be reduced 4% for each 1,000 ft. above sea
level. The furnace input rate shall be checked by clocking the
gas flow rate (CFH) and multiplying
by the heating value
obtained from the local utility supplier for the gas being
delivered at the installed altitude.
Input rate changes can be
made by adjusting
the manifold pressure
(min 3.0 - max
3.7 in. W.C. - Natural
Gas) or changing orifices (orifice
change may not always be required). If the desired input rate
cannot be achieved with a change in manifold pressure, then
the orifices must be changed. LP installations
will require an
orifice change.

2 CUBIC FOOT DIAL
SEC. FLOW SEC. FLOW
29
248
50
144
30
240
51
141
31
232
52
138

SEC.
8
9
10

FLOW
900
800
720

11
12
13
14
15
16
17
18
19
20

655
600
555
514
480
450
424
400
379
360

32
33
34
35
36
37
38
39
40
41

225
218
212
206
200
195
189
185
180
176

53
54
55
56
57
58
59
60
62
64

21
22
23
24
25
26
27
28

343
327
313
300
288
277
267
257

42
43
44
45
46
47
48
49

172
167
164
160
157
153
150
147

66
68
70
72
74
76
78
80

SEC.
82
84
86

FLOW
88
86
84

136
133
131
129
126
124
122
120
116
112

88
90
92
94
96
98
100
104
108
112

82
80
78
76
75
73
72
69
67
64

109
106
103
100
97
95
92
90

116
120
124
128
132
136
140
144

62
60
58
56
54
53
51
50

Outlet Pressure Boss
\\\

Regulator
Adjust

ii i

IMPORTANT:
Re=install the propane orifices to the same depth as the
orifices supplied with the equipment.
On/Off Switch

See Table 13 for help in selecting orifices if orifice change is
required.
Furnace input rate and temperature
rise should be
checked again after changing orifices to confirm the proper
rate for the altitude.
Installations
above 4,000 feet may require a pressure switch
change. If required, use the BAYHALT*** Kit (High Altitude
Accessory Kit) listed in PRODUCT DATA.

White-Rodgers

On/Off Switch

White-Rodgers
18-CD19D7-13

36G gas valve

36F gas valve
19

|nsta||er's

Guide
TABLE 13

Orifice
Twist Drill
Size If
Installed
At Sea
Level

CONTROLS AND
SAFETY SWITCH ADJUSTMENT
LIMITSWITCH CHECK OUT
The limit switch is a safety device designed to close the gas
valve should the furnace become overheated.
Since proper
operation of this switch is important to the safety of the unit,
it must be checked out on initial stm_ up by the installer.

ALTITUDE ABOVE SEA LEVEL
and Orifice Required At Other Elevations

2000 3000 4000 5000 6000 7000 8000 9000

10000

42
43
44
45

42
44
45
46

43
44
45
47

43
45
46
47

44
45
47
48

44
46
47
48

45
47
48
49

46
47
48
49

47
48
50
50

46
47

47
48

47
49

48
49

49
50

50
51

51
52

54
55

55
55

55
56

56
56

56
57

56
57
58

56
58
59

56
59
60

57
59
60

57
60
61

57
60
62

58
61
62

59
62
63

59
63
63

60
63
64

From NationalFuel

Gas Code-Table

F-4

LiGHTiNG iNSTRUCTiONS

DO NOT attempt to manually light the burner. Failure to
follow this warning could result in property damage,
personal injury or death.

Lighting
instructions
appear
on each unit.
Each installation
must be checked
out at the
time of initial
start
up to insure
proper
operation
of all components.
Check
out
should
include
putting
the unit through
one
complete
cycle as outlined
below.
Turn on the main electrical supply and set the thermostat
above the indicated temperature.
The ignitor will automatically heat, then the gas valve is energized to permit the flow
of gas to the burners.
After ignition and flame is established,
the flame control module monitors the flame and supplies
power to the gas valve until the thermostat
is satisfied.
TO SHUT OFF
For complete shutdown: Move the control switch on the main
gas valve to the "OFF" position (See Figures 27 and 28).
Disconnect the electrical supply to the unit.

if this
must
water
result

is done during the cold weather months, provisions
be taken to prevent freeze-up of all water pipes and
receptacles. Failure to follow this warning could
in property damage.

Whenever
your house is to be vacant,
arrange
to have
someone
inspect
your house for proper
temperature.
This is very important
in below freezing
weather.
If
for any reason
your furnace
should fai! to operate
damage
could result,
such as frozen water pipes.

To check for proper operation of the limit switches, set the
thermostat
to a temperature
higher than the indicated
temperature
to bring on the gas valve. Restrict the airflow
by blocking the return air or by disconnecting
the blower.
When the furnace reaches the maximum outlet temperature
as shown on the rating plate, the burners must shut off. If
they do not shut off after a reasonable time and overheating
is evident, a faulty limit switch is probable and the limit
switch must be replaced. After checking the operation of the
limit control, be sure to remove the paper or cardboard from
the return air inlet, or reconnect the blower.
AIRFLOW ADJUSTMENT
Check inlet and outlet air temperatures
to make sure they
are within the ranges specified on the furnace rating nameplate. If the airflow needs to be increased or decreased, see
the wiring diagram for information
on changing the speed of
the blower motor.

Disconnect power to the unit before removing the blower
door. Failure to follow this warning could result in property
damage, personal injury or death.
This unit is equipped with a blower door switch which cuts
power to the blower and gas valve causing shutdown when
the door is removed.
Operation with the door removed or ajar
can permit the escape of dangerous fumes. All panels must
be securely closed at all times for safe operation of the
furnace.
NOTE:
Direct drive motors have bearings which are permanently
lubricated and under normal use, lubrication is not recommended.
INDOOR BLOWER TIMING
The control module controls the indoor blower. The blower
starts approximately
45 seconds after ignition. The FANOFF period is approximately
100 seconds from the interruption of gas flow.
ROOM AiR THERMOSTAT HEAT ANTICIPATOR
ADJUSTMENT
Set the thermostat
heat anticipator
according to the current
flow measured,
or the settings found in the notes on the
furnace wiring diagram (found inside the furnace casing).
INSTRUCTIONS TO THE OWNERS
In the event that electrical,
fuel, or mechanical
failures occur, the owner
should immediately
turn the gas
supply off at the manual
gas valve, located
in the
burner
compartment
(See Figure
26). Also turn off
electrical
power
to the furnace
and contact
the service
agency
designated
by your dealer.

Should overheating occur, or the gas supply fail to shut off,
shut off the gas valve to the unit before shutting off the
electrical supply. Failure to follow this warning could result
in property damage, personal injury or death.

18-CD19D7-13

|nsta||er's
The following

warning complies

with State of California

This product contains fiberglass

law, Proposition

65.

wool insulation!

Fiberglass dust and ceramic fibers are believed by the
State of California to cause cancer through inhalation.
Glasswool fibers may also cause respiratory, skin, or
eye irritation.
PRECAUTIONARY

ABNORMAL CONDITIONS
1. EXCESSIVE COMBUSTION
VENT PRESSURE
OR
FLUE BLOCKAGE
If pressure against the induced draft blower outlet
becomes excessive, the pressure switch will shut offthe
gas valve until acceptable combustion pressure is again
available.
2,

MEASURES

•

Avoid breathing fiberglass dust.

•

Use a NIOSH approved dust/mist respirator.

•

Avoid contact with the skin or eyes. Wear long-sleeved,
loose-fitting clothing, gloves, and eye protection.

•

Wash clothes separately from other clothing: rinse
washer thoroughly.

•

Operations such as sawing, blowing, tear-out, and
spraying may generate fiber concentrations requiring
additional respiratory protection. Use the appropriate
NIOSH approved respirator in these situations.

FIRST AID MEASURES
Eye Contact

Skin Contact

OPERATING

Wash affected areas gently with soap
and warm water after handling.

iNFORMATiON

FLAME ROLL-OUT DEVICE
All models are equipped with a thermal control device on the
burner cover. In case of flame roll-out, the device will cause
the circuit to open which shuts off all flow of gas.

INTEGRATED
Flashing
Flashing

Slow--Fast---

Continuous

ON ---

Continuous

OFF ---

2 Flashes---

3 Flashes---

LOSS OF FLAME OR GAS SUPPLY FAILURE
If loss of flame occurs during a heating cycle (when flame
is not present at the sensor), the control module will
retry the ignition sequence up to two times after the
sensor cools. If ignition is not achieved, it will lockout
the furnace.
POWER FAILURE
If there is a power failure during a heating cycle, the
system will restart the ignition sequence automatically
when power is restored, if the thermostat
still calls for
heat.
INDUCED DRAFT BLOWER FAILURE
If pressure is not sensed by the pressure switch, it will
not allow the gas valve to open, therefore the unit will
not start. If failure occurs during a running cycle, the
pressure switch will cause the gas valve to close and
shut the unit down.

Carbon monoxide, fire or smoke can cause
injury, death, and/or property damage.

Flush eyes with water to remove dust.
If symptoms persist, seek medical
attention.

FURNACE

- No call for Heat

Normal

- Call for Heat

help alert
dwelling
occupants
of the presence
unsafe
levels
of carbon
monoxide.

of fire, smoke or

NOTE:
The manufacturer of your furnace does not test any detectors and makes no representations
regarding any brand or
type of detector.

ERROR

FLASH

CODES

Replace IFC
Check Power
System Lockout (Retries or Recycles exceeded)
Draft Pressure Error- Possible problems:
a) Venting problem
b) Pressure switch
c) Inducer

problem

4 Flashes---

Open Temperature

5 Flashes---

Flame sensed

6 Flashes--7 Flashes---

115 volt AC power reversed,
Gas valve circuit error

8 Flashes---

Low flame sense

9 Flashes---

Check Ignitor Circuit and Line "N" to 24VAC "Common"
[possible grounding problem]

18-CD19D7-13

serious bodily

A variety of potential sources of carbon monoxide can be
found in a building or dwelling such as gas-fired clothes
dryers, gas cooking stoves, water heaters, furnaces and
fireplaces. The U.S. Consumer Product Safety Commission
recommends
that users of gas-burning
appliances install
carbon monoxide detectors as well as fire and smoke detectors, listed by a nationally
recognized agency (e.g. Underwriters Laboratories
or International
Approval Services), to

CONTROL

Normal

Guide

Limit Circuit

when no flame should

be present

poor grounding

or system

voltage

too low

signal
voltage

(_<2 volts)

|nsta||er's

Guide
Notes

18-CD19D7-13

|nsta||er's

Guide

Notes

18-CD19D7-13

American Standard Inc.
6200 Troup Highway
Tyler, TX 75707
For more information contact
your loca! dealer(distributor)

Literature Order Number

*UD-IN-2F

File Number

SV-UN-FURN-*UD-IN-2F

P.I.

Supersedes

*UD-IN-2E

Stocking Location

PI Louisville & Webb/Mason-Houston

11/02

Since the manufacturer has a policy of contliTuous product and product data linprovement,
to change design and specifications without notice.

it reserves the right

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TRANE Furnace/Heater, Gas Manual L0903222

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