TRANE Furnace/Heater, Gas Manual L0903066

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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IIIIIIIIIIIIIIIIIIII IIIIIIII
18- CD20 D1 - 18
AVAILABLE

IN FRENCH

CANADIAN

(FC)

Variable Speed, 2-Stage
Upflow / Horizontal and Downflow / Horizontal,
Gas-Fired Furnaces, "Fan Assisted
Combustion System"
*UD060R9V3K
*UD080R9V3K
*UD080R9V4K
*UD100R9V3K

*UD100R9V5K
*UD120R9V5K
*UD140R9V5K
*DD060R9V3F

*DD080R9V3F
*DD100R9V5F
*DD120R9V5F

*__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

CODES

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

INFORMATION

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

see:
54 (latest

version)

CANADA -Natural
Gas Installation
Code ...... CAN/CGA-B149.1
Propane Installation
Code ............. CAN/CGA-B149.2

(latest
(latest

version)
version)

USA/CANADA
ALTERNATE
-Category I Venting Guide ......... Pub. No. 18-CH23D1

(latest

version)

Downflow / Horizontal*

Upflow / Horizontal*

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

A341789P03

Installer's

Guide
SAFETY SECTION

The following safety practices and precautions
must 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.

CARBON MONOXIDE

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.

for this furnace.

2. Install this furnace only in a location and position as
specified in "Location and Clearances" (page 3), of these
instructions.

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:

3. Provide adequate combustion and ventilation air to the
furnace space as specified in "Air for Combustion and
Ventilation" (pages 7-8), of these instructions.

1. Seal any unused openings in the venting system.

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.

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.

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 18) 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.

b. The furnace is controlled
(no field jumpers).

must be complete
instructions.

c. The furnace return air duct must be complete and
sealed to the furnace and clean air filters are in
place.

f. The furnace return air temperature
55 and 80 degrees Fahrenheit.

range

Close fireplace dampers.

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.

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 WARNING and CAUTION.

d. The furnace input rate and temperature
rise must be
verified to be within nameplate
marking.
air requirement

and

only by a room thermostat

e. 100% of the furnace combustion
come from outside the structure.

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.

and

9. The furnace may be used for temporary heating of
buildings or structures
under construction
only when the
following conditions have been met:
a. The furnace venting system
installed per manufacturer's

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.

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.
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.

POISONING HAZARD

must

a. WARNING indicates a potentially
which, if not avoided, could result
injury.

is between

b. CAUTION indicates a
which, if not avoided,
injury. It is also used
and hazards involving

g. Clean the furnace, duct work, and components upon
substantial
completion of the construction
process,
and verify furnace operating conditions including
ignition, input rate, temperature
rise and venting,
according to the manufacturer's
instructions.

hazardous
situation
in death or serious

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

FIRE OR EXPLOSION HAZARD
the Commonwealth
10. Gas
This Fitter
product in must
be gas piped byofa Massachusetts.
Licensed Plumber

or I

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-CD20D1-1

Installer's
GENERAL INSTALLATION INSTRUCTIONS
The manufacturer
assumes no responsibility
for equipment
installed in violation of any code or regulation.

Contents

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).

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 latest edition of the
National Fuel Gas Code ANSI Z223.1 • National Installation
Code, CAN/CGA B149.1. The latest code may be obtained
from the American Gas Association Laboratories,
400 N.
Capitol St. NW, Washington
D.C. 20001.
1-800-699-9277
or www.aga.org
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).

Do not install the furnace in a corrosive or contaminated
atmosphere.

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 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.

18-CD20D1-18

Instructions

General Installation Instructions
Location and Clearances
Outline Drawing
Upflow Installation
Downflow Installation
Horizontal Installation
Air for Combustion and Ventilation
Duct Connections
Return Air Filters
General Venting Instructions
Venting into a Masonry Chimney
Electrical Connections
Field Wiring Diagrams
Gas Piping
Combustion and Input Check
High Altitude Derate

Start Up and Adjustment
Preliminary Inspections
Lighting Instructions
Sequence Of Operation
Control and Safety Switch Adjustment

Abnormal
To prevent shortening its service life, the furnace should not
be used as a "Construction
Heater" during the finishing
phases of construction until the requirements listed in item
9, a-g of the safety section of this publication have been met.
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.

Guide

Conditions

IFC Error Flash Codes
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?
2. Do all clearances between the furnace and enclosure
equal or exceed the minimums stated in Clearance Table
on the Outline Drawings.
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.

i
iii

*UDIR9VIK
(ALL

OUTLINE DRAWING

DIMENSIONS

ARE

IN INCHES)

•,,_ 5/8
J"

F_4

MINIMUMCLEARANCETO COMBUSTIBLEMATERIALS

DIAMETER

UPFLOW CLOSET
LEFT SIBE
O IN
RIGHT SIDE +O IN
FLUE
#6 IN

t ,o.JP"FLUE
CONNECT
T

DIM "C"

....

AIR

B-

19-5/8 _

--_7/8
KNOCK OUT
ELECTRICAL CONNECTION
(ALTERNATE)

_- 3-15/16

5/8

¢7/8 HOLE_.. 3-1S/16_'i
ELECTRICAL
CONNECTION

_
....

GAS
2-1/16

-,- 2- I/8
_

.:0

vI
!

j
j

GAS

CONNECTION_

(ALTERNATE)/

_,__

HOLE

....

CONNECTION

30-5/8

S2 I

-T1

•.

SIDE
RETURN
ic

22-1/21

SIDE

I I

3 IN
O IN.
I IN

HORIZONTAL CLOSET (SEE NOTE 2)
TOP
+2 IN
BACK
FLUE
#6 IN
SIDES
FRONT
18 IN (SEE NOTE I)

3 IN
I IN

HORIZONTAL ALCOVE (SEE NOTE 2)
TOP
+1 IN
BACK
FLUE
#6 IN
SIDES
FRONT
18 IN

0 IN
O IN

RETURN
j

NOTES:
I) MINIMUM CLEARANCE TO FRONT ON
_UBI_OR960 AND _UDI40C960 IS 6 INCHES.
2) MAY BE INSTALLED ON COMBUSTIBLE
FLOOR WHEN TYPE B-I VENT IS USED

T
14-7/8

L...................
___!___
................
J
I-9/16

I-9/16

_
=

28-

I/2

I/2
I-5/16

-_'-

MODEL

RETURN
AIR
BOTTOM

DIM "P"

DIM

*UDOBORgVS*_
*UDOBOR9V3**
*UDIOORgV3**

*UDOBOR9V4**
*UDIOORgVB_
*UDIBORgV5**
*UDI4OR9VB**

3/4

23-1/2_

L3-13/16
H

PREFIX
SUFFIX

"A"

17-I/2 II

2111

24-I/2 II

DIM °B°

9-5/8"

DIM "C"

16-IX4 II

13-1/IBII

191_/411

l§-B/IB II

2_11/4

LETTER MAY BE IIAIIOR IITII
LETTERS MAY BE IIKII(0 THROUGH

DIM

"D°

16 II

19-I/211

23"

I:D
o
I:D

i
Go

From

Dwg.

I
I

(SEE NOTE I)

# - MAv BE III WHEN TYPE B-I VENT IS USED
+ - FORI_-I/B
II CABINETS S II WHEN SINGLE
WALL VENT PIPE IS USED,
WHEN 14-1/211 CABINETS (ALL *UDO4OC-,
÷UDO4OR-, *UDO60C-, AND _UDOGOR936) ARE
INSTALLED IN A HORIZONTAL POSITION AND A
SINGLE WALL VENT PIPE IS USED, A 6 INCH
CLEARANCE MUST BE SUPPLIED BETWEEN
THE VENT PIPE AND COMBUSTIBLE FLOORING

28-1/4

!
14-7/8

KNOCKOUT_

I/2

_- /_1-1/2
[/
€-_

I-5/16-_

_1-1/2

\LLLLLLLLL_

FRONT
BACK
TOP

21C341699 Rev. 4

ii E

Oo
i

*DD-R9V-F

OUTLINE

(ALL DIMENSIONS

DRAWING

ARE IN INCHES)

5/8
Oo

MINIMUMCLEARANCE TO COMBUSTIBLEMATERIALS
DIM "C"

DOWNFL0W CLOSET
SIDES
3+ IN W/SINGLE
WALL VENT
0 IN
W/TYPE
FLuE
6
IN W/SINGLE
WALL VENT
I IN
W/TYPE
FRONT
6
IN
BACK
I IN
÷ RIGHT
SIDE ONLY
FOR 145"
CABINETS,
0 IN
TO LEFT SIDE
0 IN
FOR BEMAINING
CABINET
SIZES
{175",
210
II , 245 II }

,/+

5/8

SIDE PANEL CUTOUT
HORIZONTAL VENTING
THROUGH CABINET

SIDE PANEL CUTOUT_
HORIZONTAL VENTING
THROUGH CABINET

I/2
I/2

7/8
ELECTRICAL
CONNECTION

I/8

T 2_/+_._-_f N
4O

HORIZONTAL ALCOVE }FLUE DISCHARGE LEFT)
TOP
S÷ IN W/SINGLE
WALL VENT
FLUE
6
IN
W/SINGLE
WALL VENT
FRONT
18
IN
BACK
0 IN
÷ TOP ONLY
FOR 145"
CABINETS
I IN
FOR REMAINING
CABINET
SIZES
{175",
210",
245")

++,,+
I
20

I VENT
I VENT

2 IN
W/TYPE
B I VENT
I IN
W/TYPE
B I VENT
SIDES
I IN

HORIZONTAL
CLOSET )FLUE DISCHAROE RIGHT)
TOP
2
IN W/SINGLE
WALL VENT
FLUE
6
IN W/SINGLE
WALL VENT
I IN
W/TYPE
B I VENT
FRONT
6
IN
BACK
3 IN
SIDES
I IN
FOR INSTALLATION
ON COMBUSTIBLE
FLOORING
ONLY
WHEN B I VENT CONNECTOR IS USED

_51/2

HI_RIZONTAL CLOSET )FLUE DISCHARGE LEFT}
TOP
5÷ IN W/SINGLE
WALL VENT
FLuE
6
IN W/SINGLE
WALL VENT
FRONT
6
IN
BACK
3 IN
÷ TOP ONLY FOR 145"
CABINETS
2 IN
FOR REMAINING
CABINET
SIZES
{175",
210",
245")

B
B

HORIZONTAL ALCOVE }FLUE DISCHARGE RIGHT}
TO _
I
IN W/SINGLE
WALL VENT
FLuE
6
IN W/SINGLE
WALL VENT
FRONT
IB
IN
BACK
O IN

I/4

IN
W/TYPE
B I VENT
IN
WTVPE
B I VENT
SIDES
0 IN

IN, W/TYPE
B I VENT
SIDES
0 IN

¢11/2
HOLE
GAS CONNECTION
2 1/16

DIM "A" _d

7/8 KNOCK OUT _
ELECTRICAL
CONNECTION
(ALTERNATE)

\
¢11/2
KNOCK OUT"
GAS CONNECTION
(ALTERNATE)

3
MODEL

*DDO6OR9V3F
*DDO8OR9V3F

17-1/2"

9-5/8"

16-1/4"

16"

*DDIOOR9V5F

21"

13-1/16"

19-3/4"

19-1/2"

*DD120R9V5F

24-1/2"

15-5/16"

23-1/4"

23"

I-I,

Iit
I
I

* - The First Letter May Be "A" or "T"
Ill

From Dwg. 21C341700 Sh. 1 Rev. 0
ol

n_
ID

Installer's

Guide

7. A furnace shall be installed
protected from water.

so electrical

components

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
iiiiiiiiiiii
physical damage from vehicles.
UPFLOW INSTALLATION
Standoffs
and screws (See Figure 1, page 6) are included with
iiiii ii}il iiiili
iiii !i/iiiil!i/iiiiiH
cased coils for attachment
to the furnace. There are
iiiiiiiiiiillthe
!iiiiiiiiiiilHiiiiiiiiliiiiiiiiiiiiiiiiiiiiiilHi
clearance alignment holes near the bottom of the coil wrapiiiiiiiiiiii per. Drill screws are used to engage the furnace top flanges.
The standoff 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. The above instructions
apply
only if the coil is on top of an upflow furnace.
(_

STANDOFFS

(4)

DRILL SCREWS

STANDOFFS

DOWNFLOWINSTALLATION

Bg_24_E
(BENT

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

;_./

UP)

CABINET

when used in

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.
IMPORTANT:
The 2/4TXC cased coil must be placed downstream of the
furnace. In horizontal installations, the apex of the coil
may point either toward or away from the furnace. See
the 2/4TXC coil Installer's Guide for more details.
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

CABINET

CABINET
RETURN
FLOOR OPENING PLENUM OPENING
WIDTH DUCT WIDTH
"A ....
B....
C ....
D"
17-1/2"
16-1/4"
16-5/8" 20-1/8"
15-5/8"
19-3/8"
21"
19-3/4"
20-1/8" 20-1/8"
19-1/8"
19-3/8"
24-1/2"
23-1/4"
23-5/8" 20-1/8"
22-5/8"
19-3/8"

(4)

FOR VERTICAL
INSTALLATIONS:

TABLE 1

are

CASED COIL CONNECTION
BRACKET FOR DOWNFLOW
FURNACE IN HORIZONTAL

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).

SIDE

FLANGE
(BENT

UP)

SUB-_

REQUIRED FLOOR OPENING: (DOWNFLOW)
See Figure 3 and Table 1

Typical Upflow/Horizontal Attic Installation
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 5). 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.
6

18-CD20D 1-18

Installer'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.

Guide

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

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

The total input of all gas utilization
equipment
installed
in the combined space shall be considered in malting this
determination.
Refer to Table 3, for minimum open
areas required.
2.

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.

Typical Suspended Upflow/Horizontal Furnace
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
affect 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 6.
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.
Confined spaces are installations
with less than 50 cu. ft. of
space per 1000 BTU/hr input from all equipment
installed.
Air for combustion and ventilation
requirements
can be
supplied from inside the building as in Figure 8 or from the
outdoors, as in Figure 9.
1. All air from inside the building as in Figure 8: 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.
18-CD20D1-18

All air from outdoors as in Figure 9: 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 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.
Exposure to the following substances
in the combustion air supply will also require 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
INPUT RATING

WITH 8 FT. CEILING
MINIMUM AREA IN SQUARE
FEET OF UNCONFINED SPACE

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

375
500
625
750
875
7

Installer's

Guide

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

Air
From
Inside

Vertical
Duct

Horizontal
Duct

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

100
100
100
120
140

15
20
25
30
35

30
40
50
60
70

iiiiiiiiiiii

CONFINED

SPACE

Air From Outside

AI_UlLDING

PERMANENT
OPENINGS

CONFINED

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.
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.
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

CONFINEDSPACE

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
the space containing the furnace.
CONFINED

SPACE

AIR FROM VENTILATED

ATTIC/CRAWL

SPACE

Minimum
return air/"air
the furnace is 55 ° F.

entering"

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

for

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.
AIR

DO NOT install
furnace
cabinet.

air through

the back

of the

RETURN AIR DUCT CONNECTION

INLET
AtR

return

DUCT

NOTE:
On upflow 5 or 6 ton airflow models, if the airflow requirement exceeds 1800 CFM, these models will require return
air openings and filters on both sides; OR 1 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.

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

18-CD20D 1-18

Installer'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 4 for duct connection dimensions for various furnaces.
4. If a 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 frame is installed,
cut along knockout guidelines.
6. Upflow Furnaces:
a filter rack is factory 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.

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.

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 above
the furnace in horizontal applications.
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.

Guide

Close coupled (less than 36") return (filter directly
beneath bottom side return) is not recommended
due to
noise considerations.
Downflow
Furnaces:
Brackets are factory supplied
mount filters in the return air duct work.
7.

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.

8. 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.

!iiii!ii!!i!!

RETURN AIR FILTERS
TYPICAL UPFLOW RETURN AIR FILTER INSTALLATIONS
Filters are factory 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.
NOTE:
On upflow 5 or 6 ton airflow models, if the airflow requirement exceeds 1800 CFM, these models will require return
air openings and filters on both sides; OR 1 side and the
bottom; OR just the bottom.

@
LOCATING

NOTCHES
PROVIDED
FOR SIDE
RETURN

CUTOUT

,4_ _i:_/

CUT OUT
FOR
SIDE
FILTER

I
/
,,,L,,,
/

I
_RuOr

N:e

• SEE OUTLINE DRAWING

REMOVE FILTER FROM UPFLOW
FURNACE WHEN RETURN DUCT IS
ATTACHED TO FURNACE TOP SIDE
(HORIZONTAL LEFT OR RIGHT
APPLICATIONS) AS SHOWN.
IIDIDIt!IB
1111
IBBBBDIIIB
DDDD
BDDBIIIII11111
DDDBBHIIIDDH
IIIIIIIIIIII
HB_
II
IIIIIIIIIIII I I
+
Close coupled (less than 36")
return (filter directly beneath
side return) not 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.

bottom
due to

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

18-CD20D1-18

Installer's

Guide
TABLE 4

UPFLOW FURNACE RETURN AIR FILTERS
CABINET
WIDTH

QTY*

CABINET
BOTTOM FILTER

CABINET
SIDE FILTER

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"

RACK
FILTER

"-_

RETAINING
PIN

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

(Both Sides)

Filter Rack Assembly

iiiiiiiiiiii
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.

®
.,-.%

Blower Deck
Engagement
Hole

%,,=,

ENGAGEMENT
HOLE DETAIL
(Typical both sides
and blower deck)

Filter
Furnace
Cabinet
Side

Rack

Filter Rack
Retaining
Screw/Pin
Engagement
Hole
For Filter Rack

Blower Door Hin(
10

and Bottom Filter Rack Installation

Installation
With
Bottom Return

18-CD20D 1-18

Installer's
Cabinet Width

Left Side

Bottom

Right Side

17,5

24,5

Guide

1, UD060C/R936K0 has 10x7 blower which requires use of alternate
filter clips for left side filter, "K1" 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

the blower door.

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

panel in place.

e. After 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.
f. Reinstall

BOTTOM
PANEL
INSTALLED

the furnace

Typical Upflow Left Side Return Filter Rack Installation

filter on the side.

BOTTOM ENGAGEMENT

Furnace
. m
Cabinet ...,,]_1

Side

Engagement
For Filter Rack
Hole
Installation With
Bottom

Filter Rack
Retaining
Screw/Pin

Filter

Rack

t
Typical Upflow Right Side Return Filter Rack Installation

Return

Bottom Panel

®
Engagement

BLOWER
DECK

Hole

For Filter Rack
Installation With
Side Return

Furnace
Blower
Deck

Furnace
Cabinet
Side

Retaining
Screw/Pin

Rack
Assembly

Typical Filters of Upflow in Horizontal
18-CD20D1-18

Installer's

Guide

RETURN AIR FILTERS FOR UPFLOW FURNACE
IN HORIZONTAL CONFIGURATION
When the Upflow Furnace is installed in the horizontal
configuration,
the return air filters must be installed exterior
to the cabinet. 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 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

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-CD20D 1-18

Installer's
TABLE 5
CABINET
WIDTH

FILTER
SIZE

FILTER BRACKET
LOCATION *

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"

17-1/2"
21"

16-1/4"

15"

14"

19-3/4"

19-1/2"

14"

24-1/2"

23-1/4"

22"

14"

GENERAL

VENTING

INSTRUCTIONS

CARBON MONOXIDE POISONING

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:
If desired, a side waft 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 shaft 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.

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.

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.

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:

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.

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 spaces of the building.
4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance not
connected to the venting system. Turn on any exhaust
fans, such as range hoods and bathroom exhausts, so
they are operating at 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.

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).

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 deterioration of the chimney.
Failure to follow this warning could result in carbon monoxide poisoning or death.

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.
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-CD20D1-18

Installer's

Guide
TABLE 8
GAS VENTTERMINATION

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

ROOF
FLAT TO

TABLE 7
MASONRY CHIMNEY VENTING
Tile Lined Chimney

Chimney Lining

Type Furnace

Internal

External

"B" Vent

Flexible
Metal Liner

Single Fan
Assist

Yes

Yes*

MINIMUM HEIGHT

PITCH

7/12

OVER

7/12

TO 8/12

OVER
OVER

8/12
9/12

TO 9/12
TO 10/12

OVER

10/12 TO

11/12

OVER

11/12 TO

12/12

OVER

12/12 TO

14/12

OVER

14/12 TO

16/12

OVER

16/12 TO

18/12

OVER

18/12 TO

20/12

OVER

20/12

22/12

THIS REQUIREMENT

Fan Assist
+
Fan Assist

Yes

Yes*

Fan Assist
+
Natural

Yes

Yes*

VERTICAL

LISTED
CAP

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.
The following installation
practices are recommended
to
minimize corrosion caused by condensation
of flue products
in the furnace and flue gas system.

COVERS MOST INSTALLATIONS

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.

1.0 FEET *
1.5 FEET
2.0 FEET
2.5 FEET
3,25 FEET
4.0 FEET
5.0 FEET
6.0 FEET
7.0 FEET
7.5 FEET
8.0 FEET

W.,_l

OPENING

THE VENT TERMINATION
LESS THAN 8 FT FROM

SHOULD
NOT BE
A VERTICAL
WALL

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.

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.
1. Avoid an excessive

number

of bends.

2. Horizontal

runs should pitch upward

3. Horizontal

runs should be as short as possible.

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.
Maximum Vent or Tile
Lined Chimney Flow Area

at least 1/4" per foot.
*Draf'_hood
diameter.

outlet

diameter,

flue

collar' diameter,

or' listed

_:(D*)---_2
X7
4

appliance

categorized

vent

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.
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

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

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.

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

8. Where long periods of airflow are desired for comfort,
use long fan cycles instead of continuous airflow.
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.
14

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.

18-CD20D1-18

Installer's
ELECTRICAL CONNECTIONS
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, ANSI/NFPA
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

VARIABLE SPEED
2-STAGE FURNACE

T'STAT

[]

FOR VARIABLE SPEED 2 STAGE FURNACE
1 STAGE HEATING
USING A 1 STAGE HEATING THERMOSTAT
NO COOLING
1.
2.
3.
4.
5.

[]
[]

6.
7.

]

W14JUMPER
SEE NOTE11

9.
10.

[]

11.
r_-.,
SEE
]

SEE
I_NOTE

tT1/

NOTE6

Be sure power aglees with equipment nameplates.
Low voltage (24 volt wiling) to be No. 18 A.W.G. min.
Grounding of equipment must comply with local codes.
Set thermostat heat anticipatol per unit wiling diaglam.
These leads provide 115V. power for connection of electronic
air cleaner and humidifier MAX. load 1.0 amps each.
When a single stage heating thermostat without fan switch
is used, no wiring on "G" terminal is used.
Wl and W2 must be jumpered together lot proper operation.
Second stage heat wiR begin 10 minutes aftel fhst stage.
Set dip switches with power off per installation instructions
to set airflow and indoor fan off delays.
Continuous fan airflow can be increased by adding this jumper.
This whe is only lot theimostats lequMng connection to
transformer common terminal.
Optional humidistat is to be connected between R and BK. Factory installed jumper R
to BK on the circuit board must be cut if optional humidistat is used. The jumper must
also be cut when applying an airflow command signal to the BK input such as with the
variable speed single-zone and multi-zone system contiolleis. On single speed cooling
only/non-heat pump systems, jumper Y to O for propel operation of the delay profiles
and the humidistat. For two compressol
st two speed systems, jumper YLo to O.

FIELD ADDED JUMPER
Wl TOW2.
2ND STAGE WILL FIRE

L_U,, _J .................
I_

[]

]NTER

)VP

NET

'/.

......

_
I

rjWH
_H /I , /I
I_K
--_--_=Ln

II /

F U 1:2 N A C E

+,1

JJNCTIO
_ox

I
I

I
.... I

mk_ F]ELIU
'i'J

24
g.
L ]NE

..........
t+

W[R]NG

G ou rl S
SCREW

_
I_

60 HZ., POWER
SUPPLY PER

NOTES

IIL]NE

...........

[]

SEE
NOTE 10

_
]_

i'N'JR[q";

"k FAtZTE) RY
v'. J _" W I Y¢[ N ,_]

EACSEE

[_ WH __

.....

]_BK

[

I _
_

I
_
From Dwg. B342027 Rev. 0

FIELD WIRING DIAGRAM FOR VARIABLE SPEED 2 STAGE FURNACE
2 STAGE HEATING
USING A 2 STAGE HEATING THERMOSTAT
NO COOLING
VARIABLE SPEED
B-STAGE FURNACE
--

T'STAT

[]

nameplates.
I. Be sure power agrees with equipment
2. Low voltage (24 volt wiring) to be No. 18 A,W,G, rain,
3, Grounding
of equipment
must comply with local codes,
Set thermostat
heat anticipator
per unit wiring diagram,
These leads provide 115M power for connection
of electronic

[]

wire is only for thermostats
6,This
transformer
common terminal,

air cleaner

]

WI4JUMPER
SEE NOTE 9

i
i_
]J

[]

Continuous

Set dip switches with power off per installation
instructions
to set airflow and indoor fan off delays,
Optional humidistat
is to be connected
between R and BK, Factory
installed jumper R to BK on the circuit board must be cut if optional
humidistat
is used, The jumper must also be cut when applying an airflow

can be increased

by adding

this jumper,

SEE
NOTE 7

[]

[]
SEE
NOTE 6

[]
I

INTER

CUdPSNENT
P4

18-CD20D1-18

load 1.0 amps each,
requiring connection
to

command
signal to the BK input such as with the variable speed single-zone
and multbzone
system controllers,
On single speed cooling only/non-heat
pump
systems,
jumper Y to O for proper operation
of the delay profiles and the humidistat,
For two compressor
or two speed systems,
jumper YLo to O

F_.,

[]

fan airflow

MAX,

[]

and humidifier

",t71R[N

"_L FIELD

[_ iNE"

,/. ]k ',B,'[_i IN G

24 ,/.
L ]NE

m(> FA T'F_Y
,/.J
'TR[R IN G

From

Dwg.

B342025

Rev. 0

Installer's

Guide
FIELD WIRING DIAGRAM FOR VARIABLE SPEED 2 STAGE FURNACE
1 STAGE HEATING, 1 STAGE COOLING
USING A 1 STAGE HEATING, 1 STAGE COOLING THERMOSTAT
(OUTDOOR SECTION WITHOUT TRANSFORMER)
VARIABLE
SPEED
?-STAGE
FURNACE

T "STAT

[]

NOTES

o-,

BE SURE POWER AGREES
WITH
EQUIPMENT
NAMEPLATE[S)
LOW VOLTAGE(24
v
WIRING)
TO BE O
18 A w G MIN

5
4
5

GRO NDING
OF EQUISMENT
MUST COMPLY
WITH
LOCAL
SET THERMOSTAT
HEAT ANTICIPATOR
PER NIT
WIRING
THESE LEADS
PROVIDE
115 V
POWER FOR CONNECTIO
CLEANER

[]
[]
UNIT

LOAD

W14JUMPER

WIRE
IS ONLY FOR THERMOSTATS
ECTION
TO TRANSFORMER
COMMO

SET
TO

DIP
SET

SWITCHES
AIRFLOW

OPTIONAL
INSTALLED

AND

WITH
AND

POWER
INDOOR

HUMIDISTAT

JUMPER
IS

MULTI

R
USED
TO

SIGNAL
ZONE

SYSTEMS,
HUMIDISTAT

FIELD

BK
THE

THE

SYSTEM

JUMPER
FOR

L_J,

THE

ADDED

10 MINUTES

TO 115V

' P".,

[--LH

LOCALCODES

•
W]_]NG

2 4

HUM SEE

J ""

.--I

NOTE5

L} BK

__Jr

EAC SEE
NOTE5

F A {" •

V.._

--LINE

FACTORY
CUT

SPEED
OF
THE
SYSTEMS,

COOLING

OPTIONAL
AIRFLOW
ZONE

ONLY/NON

BELAY
PROFILES
JUMPER
YLO

HEAT
AND
TO
O

PUMP

THE

[_
L"

WH -Sl<

....

,I
J

,_,

I S

I
_

___

ClcqV

_
%
FIELD
V._W]RING

BK
BE

WHEN
APPLYING
AN
VARIABLE
SPEED,SINGLE

JFURNACE
UNCT ] 0N
I

III _

.w./

V.
E

B--_I<"
'1--1-[_

BB.Z.,
POWER
J
SUPPLY PER

;

_-_

II I

,I--

SEE

AND

MUST
CUT
THE

V GROUND
SC REW

AFTER lS1_

SINGLE

OPERATION
TWO
SPEED

BOARD
ALSO
BE
AS
WITH

PROPER

JUMPER

"l.Ld

BLOWER

INSTRUCTIONS

BETWEEN

CIRCUIT
MUST
SUCH

CONTROLLERS,

L,._

----LI

REO IRING
TERMINAL

CONNECTED

JUMPER
INPUT

Y TO
O
FOR
TWO
COMPRESSOR

Wl TO W2.
2ND STAGE WILL FIRE

COM_OkEIxT

AIR

EACH

OFF
PER
INSTALLATION
FAN
OFF
DELAYS

[]

INTER

O AMPS

SEENOTE9

NOTE7
[]

I'_'_'-I

THE
"Y"
TERMINAL
FROM THE THERMOSTAT
MUST BE WIRED
TO THE
"Y"
TERMINAL
OF THE
FUR ACE CONTROL
FOR PROPER
OPERATION
DURING
COOLING

HUMIDISTAT
COMMAND

]

MAX

THIS
CO

SEE

HUMIDIFIER

[]

TRANSF©RMER)

AND

CODES
DIAGRAM
OF ELECTRONIC

8
OUTDOOR
(NO

I
2

h'B!

I i,,__1
l_q
_--_

0R Y

Ii
I

From

Dwg. B342022

Rev. 0

WIRING

FIELD WIRING

DIAGRAM

FOR VARIABLE

SPEED

2 STAGE

FURNACE

2 STAGE HEATING,
1 STAGE COOLING
A 2 STAGE HEATING, 1 STAGE COOLING
THERMOSTAT

USING

(OUTDOOR

SECTION

VARIABLE
SPEED
?-STAGE
FURNACE

T'STAT

[]

[] o.,
W141

SEE []

NOTE9
L

.__/F_I

OUTDOOR
UNIT
(NOTRANSFORMEf_)

W14JUMPER
SEE NGTE9

[]
SEE

[]

WITHOUT

TRANSFORMER)

NOTE:
I
BE SURE POWER AGREES WITH EQUIPMENT
NAMEPLATE(S}
R
LOW VOLTAGE (R4V
WIRING)
TO BE NO
IBAWG MIN
3
GROUNDING
OF EQUIPMENT
MUST COMPLY
WITH
LOCAL
BUILDING
CODES
4
SET THERMOSTAT
HEAT ANTICIPATOR
PER UNIT WIRING
DIAGRAM
5
THESE
LEADS
PROVIDE
llSV
POWER
FOR CONNECTION
OF ELECTRONIC
AIR CLEANER
AND HUMIDIFIER
MAX
LOAD I0
AMPS EACH
6
THIS WIRE
IS ONLY FOR THERMOSTATS
REQUIRING
CONNECTION
TO
TRANSFORMER
COMMON
TERMINAL
7
THE "Y" TERMINAL
FROM THE THERMOSTAT
MUST
BE WIRED
TO THE
"Y" TERMIRAL
OF THE FURNACE
CONTROL
FOR PROPER
BLOWER
OPERATION
DURING COOLIRG
8
SET DIP SWITCHES WITH POWER OFF PER INSTALLATION
INSTRUCTIONS
TO SET AIRFLOW AND INDOOR FAN OFF DELAYS
9)
OPTIONAL
HUMIDISTAT
IS TO BE CONNECTED BETWEEN "R"
AND "BK"
FACTORY IRSTALLED
JUMPER "R" TO "BH" ON THE CIRCUIT
BOARD MUST
BE CUT IF OPTIONAL
HUMIDISTAT
IS USED
THE JUMPER MUST ALSO BE
CUT WHEN APPLYING
AN AIRFLOW COMMAND SIGNAL
TO THE "BN"
INPUT
SUCH AS WITH THE VARIABLE
SPEED SINGLE
ZORE AND MULTI
ZONE
SYSTEM CONTROLERS
ON SINGLE
SPEED COOLING ONLY / NON HEAT PUMP
SYSTEMS,
JUMPER "Y" TO "0" FOR PROPER OPERATION
OF THE DELAY
PROFILES
AND THE HUMIDISTAT
FOR TWO COMPRESSOR OR TWO SPEED
SYSTEMS,
JUMPER "YLO"
TO "0"

[]
SEE

i
L

•

INTER

COk,4POqENT

',,,,I,ilRING

-w

?
'v'.
L ] I' E
24

--LINE

.,r
'_

\ FIELD
',,/'/I IN ',_
From Dwg

FA,,'}•O

B342020

Rev, 0

',,". _'v'v'IFINO

18-CD20D 1-18

Installer's
FIELD WIRING

DIAGRAM
2 STAGE

(OURDOOR

SECTION

VARIABLE SPEED
2-STAGE FURNACE

T 'STAT

FOR VARIABLE
HEATING,

D
OUTDOOR

UNIT

@
D
B
D
D
D
B

NO 1

(NO TRANSFORMER)
SEE NOTE 3

OUTDOOR

UNIT

NO 2

(NO TRANSFORMER}

EO
D
D
Eg

i
i
I
I

SEE
NOTE 7

SEE
NOTE6

[]

O_\

WITHOUT

BE
LOW

GROUNDING

SET

THESE

POWER

7.
FACTORY
INSTALLED

THE

THE
THE

WITH

INDOOR

JMPER
[G
SED.

ZONE
H

M1}1

TO
THE

SYSTEM
JUMPER
TAT.

FOR

BK
Y

THE

INPUT

CONTROLLERS,
TO
0 FOR
TWG

ELECTRONIC

A[R

WIRE[I)

FOR

PROPER

INSTALLAT]ON

BLOWER

INSTRUCT]ONS

}ELAYS.
BETWEEN

CIRCUIT
MUST
ALGO
SUCH
PROPER

COMPRESSOR

D[AGRAM.

EACH.

MLGT

PER
OFF

CODES.

CONTROL

CONNECTED

BK
ON
JUMPER

THE

AMPS

REQUIR[
TERMINAL.

THERMOSTAT

WIRING

CONNECTION

1.0

FURNACE

OFF

M[
LOCAL

UNIT

FOR

LOAD

FAN

A.W.G.
W[TH

>E_

PDWER

POWER

AN[)

SIGNAL

AND
MULTI
PUMPSYSTEMS,
AN[}

FROM
OF
COOLING.

TERMINAL
DURING

COMPLY

MAX.

HUM[D[STAT

COMMAND

HUM[D]FIER

AIRFLOW

IN
TALLED
HUMIDISTAT

NAMEPLATE(S}

NO.

ONLY
FOR
THERMOSTATS
TO
TRANSFORMER
COMMON

SWITCHES

OPTIONAL

MUST

115

TERM]NAL

DIP

EQUIPMENT
TO

ANTICI/SATOR

PROVIDE

"Y"

W[TH

WIRING)

HEAT

AND

*'Y2"

SET
TG

EQUIPMENT

LEA}S

TO
THE
OPERAT]ON
8.

THERMOSTAT

THIS
WIRE
CONNECT]ON
THE

AGREES

VOLTAGE

CLEANER

JUMPER

TRANSFORMER)

SURE

2 STAGE FURNACE

2 STAGE COOLING

NOTES
I.

SPEED

Guide

AND

BK.

BOARD
M/
T BE
CLT
BE
CUT
WHEN
APPLY]

WITH

SINGLE
OPERAT]ON
OR

TWO

THE

VARIABLE
SPEED
OF

SPEED

FACTORY
]F
G
SPEED

COOLING
THE
DELAY
SYSTEMS,

OPTIONAL
AN
AIRFLOW
S]NOLE

ZONE

ONLY/NON
PROFILES
JUMPER

HEAT

YLO

D
i

INTER

COMPONENT
24

WIRING
V.

LINE
24
LINE

_
V.•

FIELD
WIRING
FACTORY
WIRING

HUMIDISTAT HOOKUP
If an optional humidistat
is to be connected between "R"
and "BK", the factory installed jumper between "R" and "BK"
on the circuit board must be cut. If an optional Humidistat
is
used, the jumper must also be cut when applying an airflow
command signal to the "BK" input such as with the variable
speed single-zone and multi-zone system controller.
On
single speed cooling only/non-heat
pump systems, jumper "Y"
to "O" for proper operation of the delay profiles and the
humidistat.
For two compressor or two speed systems,
jumper "Ylo" to "0".

18-CD20D1-18

The factory installed jumper between
"R" and "BK" on the circuit board
must be cut if an optional Humidistat
is installed.

Installer's

Guide

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)
MANUAL MAIN
SHUTOFF

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 8 for delivery sizes. Connect gas supply
to the unit, using a ground joint union and a manual shut-off
valve as shown in Figure 27. National codes require a
condensation
drip leg to be installed ahead of the controls as
shown in Figure 27.
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-off valve during any
pressure testing of the gas supply piping system at test
pressures
equal to or less than 1/2 psig.

UNION

JOINT

Use a backup wrench on the gas valve when installing gas
piping to prevent damage to the gas valve and manifold
assembly.

DRIP LEG

AUTOMATIC GAS VALVE
WITH MANUAL SHUTOFF

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.

RIGHT SIDE PIPING (OPTIONAL)

SHUTOFF VALVE

UNION

JOINT

All gas fittings must be checked for leaks using a soapy
solution before lighting the furnace. DO NOT CHECK WITH
AN OPEN FLAME!
The following

warning complies

with State of California

law, Proposition

65.

Hazardous Gases!
DRIP LEG

WITH MANUAL SHUTOFF

TOP VIEW OF RIGHT SIDE PIPING

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.
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.

J
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.

3. Match the "See" column
with the time clocked.

in the gas flow (in cfh) Table 13

4. Read the "Flow" column
clocked.

opposite

the number

of seconds

5. Use the following factors if necessary:
For 1 Cu. Ft. Dial Gas Flow CFH =
Chart Flow Reading + 2
For 1/2 Cu Ft. Dial Gas Flow CFH =
Chart Flow Reading + 4
For 5 Cu. Ft. Dial Gas Flow CFH =
10X Chart Flow Reading + 4
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.
18-CD20D 1-18

Installer's
7. Changes can be made by adjusting the manifold pressure
(See Table 9), or changing orifices (orifice change may not
always be required). To adjust the manifold pressure:
a.

Turn off all electrical

turn the regulator
The final manifold
specified in Table
nameplate
rating
nameplate
rating,
high altitude.

power to the system.

b. Attach a manifold pressure gauge to the outlet
pressure tap marked "OUT PRESS TAP" on
White-Rodgers
gas valve model 36E or boss marked
"OUT P" on White-Rodgers
gas valve model 36G. (See
Figure 28 for White-Rodgers
gas valve model 36E and
Figure 29 for White-Rodgers
gas valve model 36G).
For the gas valve model 36E, measurements
require
removal of the plug and installation
of a barbed
fitting. Attach flexible tubing and a manometer
to the
barbed fitting. For the gas valve model 36G, do not
remove the pressure tap test screw. Loosen the
pressure tap test screw one turn and install flexible
tubing and a manometer
directly onto the outlet
pressure boss.
c. Turn on system power and energize valve.
d. For the White-Rodgers

adjust screw counterclockwise.
pressure setting shall be as
9 with an input of no more than
and no less than 93% of the
unless the unit is derated for

7. Replace high adjustment
tighten securely.
8. Cycle the valve several
setting.
f. Turn off all electrical

Guide

regulator

cover screw and

times to verify regulator

power to the system.

g. Remove the manometer
and flexible tubing. Remove
the barbed fitting and replace the plug or tighten the
pressure test screw.
h. Turn on electrical
valve.

power to the system and energize

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

gas valve model 36E:

1. Adjust low fire by removing
seal screw (See Figure 28).

the low adjustment

2. To increase outlet pressure,
set screw clockwise.

turn

the 3/32" socket

To decrease outlet pressure,
counterclockwise.

turn

the set screw

Adjust regulator until pressure shown on manometer matches the pressure specified in Table 9.
3. Replace low adjustment
securely.

seal screw and tighten

4. Cycle the valve several
setting.

times to verify regulator

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.

White-Rodgers 36E

5. Adjust high fire by removing the high adjustment
regulator cover screw (See Figure 28).
6. To increase outlet pressure, turn the regulator
adjust screw clockwise. To decrease outlet pressure,
turn the regulator adjust screw counterclockwise.
The final manifold pressure setting shall be as
specified in Table 9 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.
7. Replace high adjustment
regulator cover screw and
tighten securely.
8. Cycle the valve several times to verify regulator
setting.
e. For the White-Rodgers

gas valve model 36G:

1. Adjust low fire by removing the low adjustment
regulator cover screw (See Figure 29).

2nd Stage (HI)
Pressure
Adjustment

Gas Valve On / Off
Toggle Switch

White-Rodgers 36G

2. To increase outlet pressure, turn the regulator
adjust screw clockwise. To decrease outlet pressure,
turn the regulator adjust screw counterclockwise.
Adjust regulator until pressure shown on manometer matches the pressure specified in Table 9.
3. Replace and tighten
securely.

the regulator

4. Cycle the valve several
setting.

2nd Stage (HI)
Manifold
Pressure
Adjustment

cover screw
Manifold
Pressure
Adjustment

times to verify regulator

5. Adjust high fire by removing the high adjustment
regulator cover screw (See Figure 29).
6. To increase outlet pressure, turn the regulator
adjust screw clockwise. To decrease outlet pressure,
18-CD20D1-18

1st Stage (LO)
Manifold
Pressure
Adjustment

Gas Valve On / Off
Toggle Switch

Installer's

Guide

Table 11 lists the main burner orifices shipped with the
furnace.
If a change of orifices is required to correct the input
rate, refer to Table 12.
TABLE 9
FINAL MANIFOLD

PRESSURE SETTINGS (inches w.c.)

FUEL

2nd Stage Max.

1st Stage Max.

NATURAL GAS

3.5" W.C.

1.7" W.C.

LP GAS

10.5" W.C.

6.0" W.C.

TABLE 10
NATURALGAS ONLY
TABLE OF CUBIC FEET PER HOUR OF GAS
FOR VARIOUSPIPE 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 SRGR. gas

TABLE 11
ORIFICE SIZES
INPUT
RATING
BTUH

MAIN BURNER ORIFICE
DRILL SIZE

NUMBER
OF
BURNERS

NAT. GAS

LP GAS

40,000

60,000
80,000

3
4

45
45

56
56

100,000
120,000
140,000

5
6

45
45

56
56

PART NUMBERS

TABLE 12
FOR REPLACEMENT

ORIFICES

DRILL
SIZE

PART
NUMBER

DRILL
SIZE

PART
NUMBER

44
45

ORF00501
ORF00644

46
47
48
49
50

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.
20

Important:
Reinstall the propane orifices to the same depth as the orifices
supplied with the equipment.
See Table 14 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.
Installation
of this furnace
at altitudes
above 2,000 ft.
(610m) shall be in accordance with the local codes, or in the
absence of local codes, the National
Fuel Gas Code, ANSI
Z223.1 / NFPA 54 or National Standard
of' Canada, Natural
Gas and Propane Installation
Code, CSA 149.1. Installation
of
this furnace at altitudes above 2,000 ft. (610m) shall be made
in accordance
with the listed high Altitude Conversion
Kit
available with this furnace.
TABLE 13
GAS FLOW IN CUBIC FEET PER HOUR
2 CUBIC FOOT DIAL
SEC.
8
9
10
11
12
13

FLOW
900
800
720
655
600
555

SEC.
29
30
31
32
33
34

FLOW
248
240
232
225
218
212

SEC.
50
51
52
53
54
55

FLOW
144
141
138
136
133
131

SEC.
82
84
86
88
90
92

FLOW
88
86
84
82
80
78

14
15
16
17
18
19
20
21
22
23

514
480
450
424
400
379
360
343
327
313

35
36
37
38
39
40
41
42
43
44

206
200
195
189
185
180
176
172
167
164

56
57
58
59
60
62
64
66
68
70

129
126
124
122
120
116
112
109
106
103

94
96
98
100
104
108
112
116
120
124

76
75
73
72
69
67
64
62
60
58

24
25
26
27
28

300
288
277
267
257

45
46
47
48
49

160
157
153
150
147

72
74
76
78
80

100
97
95
92
90

128
132
136
140
144

56
54
53
51
50

TABLE 14
Orifice
ALTITUDE ABOVE SEA LEVEL
Twist Drill
Size If
and Orifice Required At Other Elevations
Installed
At Sea
Level
2000 3000 4000 5000 6000 7000 8000 9000 10000
42
43
44
45
46
47

42
44
45
46
47
48

43
44
45
47
47
48

43
44
45
47
47
49

43
45
46
47
48
49

44
45
47
48
48
49

44
46
47
48
49
50

45
47
48
49
49
50

46
47
48
49
50
51

47
48
50
50
51
52

54
55
56
57
58

54
55
56
58
59

55
55
56
59
60

55
55
57
59
60

55
56
57
60
61

55
56
57
60
62

55
56
58
61
62

56
56
59
62
63

56
56
59
63
63

56
57
60
63
64

From National

Fuel Gas Code-Table

F-4
18-CD20D1-18

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

START UP AND ADJUSTMENT
PRELIMINARY INSPECTIONS
With gas and electrical
power
1. Duct connections

are properly

2. Filters

are in place

3. Venting

is properly

"OFF"
sealed

assembled

4. Blower door is in place
Turn knot) 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.
LIGHTING INSTRUCTIONS
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 28 and 29).
Disconnect the electrical supply to the unit.

If this is done during the cold weather months, provisions
must be taken to prevent freeze-up of all water pipes and
water receptacles. Failure to follow this warning could
result 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 fail to operate damage could
result, such as frozen water pipes.

Guide

OF OPERATION

Thermostat call for heat (2-stage thermostat)
Call for 1st stage only:
R and W1 thermostat
contacts close signaling the control
module to run its self-check routine. After the control module
has verified that the 1st stage 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 in 1st stage to permit gas flow to the
burners.
The flame sensor confirms that ignition has been
achieved within the 4 second ignition trial period.
As the flame sensor confirms that ignition has been achieved,
the delay to fan ON period begins timing and after approx.
45 seconds the indoor blower motor will be energized at low
speed and will continue to run during the heating cycle.
Call for 2nd stage after 1st stage:
R and W2 thermostat
contacts close signaling a call for 2nd
stage heat. After a 30 second delay, the induced draft blower
will be energized on high speed and the 2nd stage pressure
switch contacts will close allowing the gas valve to be energized
in 2nd stage and the indoor [)lower motor in high speed.
2nd stage

satisfied,

1st stage still called:

n andW2thermostatcontactsopensignalingthat 2ndstage
heating requirements
are satisfied.
is reduced to low speed allowing the
switch contacts to open and the gas
stage. After approx. 30 seconds the
reduced to low speed.

The induced draft [)lower
2nd stage pressure
valve is reduced to 1st
indoor blower motor is

1st stage satisfied:
R and W1 thermostat
contacts open signaling that 1st stage
heating requirements
are satisfied.
The gas valve will close
and the induced draft blower will be de-energized.
The indoor
blower motor will continue to run for the fan off period (Field
selectable at 60, 100, 140 or 180 seconds - Factory setting is
100 seconds), then will be de-energized by the control module.
Thermostat call for heat (1-stage Thermostat)
R and W1/W2 (jumpered) thermostat
contacts close signaling
a call for heat. 1st stage sequence of operation remains the
same as above. 2nd stage heat has a 10 minute delay from
the time of 1st stage ignition.
Thermostat
satisfied:
R and W1/W2 (jumpered) contacts open signaling the control
module to close the gas valve and de-energize the induced
draft blower. The indoor blower motor will continue to
operate at high heat speed for approx. 30 seconds after the
flames are extinguished
and then is switched to low heat
speed for the remaining FAN-OFF period.
INDOOR BLOWER OPERATION WITH THERMOSTAT FAN
SWITCH "ON":
Fan is R-G.

FIRE OR EXPLOSION HAZARD

R-W energized,

Failure to follow the safety warnings exactly could result in
serious injury, death or property damage.

Heat Low speed if it is a two stage furnace.

fan continues

to run without

interruption.

Heat speed if it is a single stage furnace.

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.

18-CD20D1-18

Installer's

Guide

EXPLOSION HAZARD!
PROPANE GAS IS HEAVIER THAN AIR AND MAY COLLECT IN ANY LOW AREAS OR CONFINED SPACES. IN
ADDITION, ODORANT FADE MAY MAKE THE GAS
UNDETECTABLE EXCEPT WITH A WARNING DEVICE. IF
THE GAS FURNACE IS INSTALLED IN A BASEMENT, AN
EXCAVATED AREA OR A CONFINED SPACE, IT IS
STRONGLY RECOMMENDED TO CONTACT A GAS
SUPPLIER TO INSTALL A GAS DETECTING WARNING
DEVICE IN CASE OF A GAS LEAK.
NOTE: The manufacturer of your furnace does NOT test any
detectors and makes no representations regarding any
brand or type of detector.

CONTROL AND SAFETY
ADJUSTMENT

SWITCH

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 blocldng 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.

This setting is equivalent to BAY24X045 relay
benefit.
This selection provides ENHANCED MODE, which
is a ramping up and ramping down of the blower
speed to provide improved comfort, quietness,
and potential energy savings. See Wiring Diagram
notes on the unit or in the Service Facts for
complete wiring setup for ENHANCED MODE. The
graph which follows, shows the ramping process.

100% if necessary
80%

The following table and graph explain the delay-off settings:
COOLING
OFF - DELAY OPTIONS
SELECTION

NOMINAL
AIRFLOW

5 - OFF

6 - OFF

NONE

SAME

5 - ON

6 - OFF

1.5 MINUTES

100% *

5 - OFF

6 - ON

3 MINUTES

50%

5 - ON

6 - ON

50 - 100%

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.
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 27).
Also turn off electrical
power to the furnace and
contact
the service agency designated
by your dealer.

50%

_ast Cooling

Cooling: The fan delay-off period is set by dip switches on the
Integrated
Furnace Control. The options for cooling delay off
is field selectable by dip switches #5 and #6.

SWITCH SETTINGS

LIMIT SWITCH 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 start up by the
installer.

50%

INDOOR BLOWER TIMING
Heating:
The Integrated
Furnace Control (IFC) controls the
variable speed indoor blower. The blower "on" time is fixed at
45 seconds after ignition.
The FAN-OFF period is field
selectable by dip switches #1 and #2 located on the Integrated Furnace Control between the 5-pin and 9-pin wire
connectors.
The delay may be set at 60, 100, 140, or 180 seconds. The factory setting is 100 seconds (See unit wiring
diagram).

Efficiency

OFF

I,I
minute

I
minutes

I 3 I
minutes

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.

See Wiring Diagram on the unit or in the Service Facts
for complete wiring setup for Enhanced Mode.

18-CD20D1-18

Installer's
ABNORMAL CONDITIONS
1. EXCESSIVE COMBUSTION
PRESSURE
(WIND IN
EXCESS OF 40 MP.H.) VENT OR FLUE BLOCKAGE
If pressure against induced draft blower outlet becomes
excessive, the pressure switch will open and shut off the
gas valve until acceptable combustion pressure is again
available.
2. LOSS OF FLAME
If loss of flame occurs during a heating cycle, or flame is
not present at the sensor, the flame control module will
close the gas valve. The flame control module will then
recycle the ignition sequence, then if ignition is not
achieved, it will shut off the gas valve and lock out the
system.

The following

warning

complies

with State of California

Guide
law, Proposition

This product contains fiberglass 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

MEASURES

•

Avoid breathing fiberglass dust.

•

Use a NIOSH approved dust/mist respirator.

3. 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.

•

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.

4. GAS SUPPLY FAILURE
If loss of flame occurs during a heating cycle, the system
integrated
control module will recycle the ignition
sequence, then if ignition is not achieved, the integrated
control module will shut off the gas valve and lock out
the system.

•

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.

5. INDUCED DRAFT BLOWER FAILURE
If pressure is not sensed by the pressure switch, the
contacts will remain open and not allow the gas valve to
open, therefore the unit will not start. If failure occurs
during a running cycle, the pressure switch contacts will
open and the gas valve will close to shut the unit down.
6. RESET AFTER LOCKOUT
When the integrated
control module has shut the system
down and gone into lockout, the system must be manually reset before the unit will restart.
To reset, turn the
system power off, then on, then off and then on again
within 30 seconds. This may be done at the unit's power
source or at the thermostat.
The system will not reset
unless the procedure of[:on-of[:on is completed within
30 seconds.
Carbon monoxide, fire or smoke can cause serious bodily
injury, death, and!or property damage.
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 per the manufacturers
installation
instructions
to help
alert dwelling occupants of the presence of fire, smoke or
unsafe levels of carbon monoxide. These devices should be
listed by Underwriters
Laboratories,
Inc. Standards ['or
Single and Multiple Station Carbon Monoxide Alarms,
UL 2034 or CSA International
Standard,
Residential
Carbon Monoxide Alarming Devices, CSA 6.19
NOTE:
The manufacturer of your furnace does not test any detectors and makes no representations regarding any brand or
type of detector.

18-CD20D1-18

65.

FIRST AID MEASURES
Eye Contact

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

Skin Contact

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

iiiliii_iiiiiiii!
Failure to follow safety warnings exactly, could result
in a fire or explosion causing property damage,
personal injury or loss of life.
-- Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
-- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch;
do not use any phone in your building.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier,
call the fire department.
Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.

Installer's

Guide

INTEGRATED
FURNACE CONTROL
Normal - No call for Heat
Flashing Slow--Normal - Call for Heat
Flashing Fast --Continuous ON --Replace IFC
Continuous OFF --2 Flashes---

3 Flashes ---

4 Flashes --5 Flashes --6 Flashes --7 Flashes --8 Flashes --9 Flashes ---

ERROR FLASH CODES

Check Power
System Lockout (Retries or Recycles exceeded)
Draft Pressure Error - Possible problems:
a) Venting problem
b) Pressure switch problem
c) Inducer problem
Open Temperature Limit Circuit
Flame sensed when no flame should be present
115 volt AC power reversed, poor grounding or system voltage too low
Gas valve circuit error
Low flame sense signal
Check Ignitor Circuit and Line "N" to 24VAC "Common"
[possible grounding problem]

voltage (_<2 volts)

Tl2Z_

6200 Troup Highway
Tyler, TX 75707
For more information contact
your local dealer(distributor)

Since the manufacturer has a policy of continuous product and product data improvement,
change design and specifications without notice.

it reserves the right to

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TRANE Furnace/Heater, Gas Manual L0903066

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