ICP C9MPT125L20A1 User Manual 90+ 2 STAGE & MULTI SPEED BLOWER GAS FURNACE Manuals And Guides L0502478

ICP Furnace/Heater, Gas Manual L0502478 ICP Furnace/Heater, Gas Owner's Manual, ICP Furnace/Heater, Gas installation guides

User Manual: ICP C9MPT125L20A1 C9MPT125L20A1 ICP 90+ 2-STAGE & MULTI-SPEED BLOWER GAS FURNACE - Manuals and Guides View the owners manual for your ICP 90+ 2-STAGE & MULTI-SPEED BLOWER GAS FURNACE #C9MPT125L20A1. Home:Heating & Cooling Parts:Icp Parts:Icp 90+ 2-STAGE & MULTI-SPEED BLOWER GAS FURNACE Manual

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90+2-Stage

& *9MPT & *9MPV

VariableSpeed .Dooo,o
Orooo.,c,.,,
FAN ASSISTED,
Category
Iv Furnace

DIRECT VENT GAS FURNACE

SAFETY
Recognize

safety

the potential
Understand
serious

the signal

hazards,

CAUTION

Installing

to identify

and servicing

service

performed

by trained

Follow

all

unsafe

the unit and other
In the

No. 54-2002.

Code

CSA

(NSCNGPIC)

These

and service

instructions

cover

Whenyouseethissymbolonthefurnaceandininstructions

or CA UTION.

personal

injury

that may

result

installation,
can

reliability,

be hazardous

basic
When

Lewisburg,

Comfort

These

words

or death.
in minor

are used with the safety-alert

symbol.

DANGER

identifies

the most

WARN/NGsignifiesahazardthatcouldresultinpersonalinjuryordeath.
personal

injury

or product

and property

damage.

NOTE

is used to highlight

or operation.
due to gas and electrical

safety

United

functions

on heating

precautions

that may

States,

In Canada,

B149.1-00.

maintenance

working

Wear

follow

all safety

refer to the current

components.

Only

trained

and qualified

personnel

should

safety

glasses

such

as cleaning

equipment,

observe

and replacing

precautions

air filters.

All other

in the literature,

operations

must

on tags, and on labels

be

attached

apply.
codes
edition

and work

including

the

of the National
gloves.

Have

current
Standard

edition

National

of Canada

fire extinguisher

Fuel

Natural

available

Gas

Code

(NFGC)

Gas and Propane

during

start-up

ANSI

Installation

and adjustment

calls.
minimum

requirements

and conform

exceed certain local codes and ordinances,
especially
those
these instructions
as a minimum
for a safe installation.

International

manualsbealertto

equipment.

personnel.

Z223.1-2002/NFPA

procedures

practices

can perform

service

codes.

in severe

equipment

heating

personnel

with

safety

WARNING,

result

in enhanced

heating

or service

Untrained

to or shipped

DANGER,

that will

that will result

repair,

Thisisthesafety-alertsymbolZ_.

injury.

words

those

is used

suggestions

install,

information.

for personal

REQUIREMENTS

Products,

to existing

national

standards

and safety codes.

that may not have kept up with changing

LLC

In some

residential

INSTALLER:

TN 37091

on or adjacent

instances,

construction

these

practices.

instructions
We require

Affix these instructions
to the furnace.

CONSUMER:
Retain these
instructions for future reference.

Table of Contents
1. SafeInstallationRequirements.................
2. Installation................................
3. Combustion& VentilationAir ..................
4.Vent& CombustionAirPiping ................
5. GasSupply and Piping ......................
6. ElectricalWiring ...........................

3
4
7
10
28
31

ELECTRIC SHOCK HAZARD
Failure to follow safety
warnings exactly could result
in serious injury, death, and/or
property damage.
Turn Off All Power Before
Servicing.

Printed

in U.S.A.

7. Ductworkand Filter .......................
8. Checksand Adjustments....................
9. FurnaceMaintenance ......................
10.Sequenceof Operation& Diagnostics..........
11.ConcentricVentTermination.................
TechSupport and Parts .......................

CARBON
HAZARD.

MONOXIDE

POISNING

AND

33
36
38
39
44
47

FIRE

Failure to follow safety warnings exactly cou Id
result in serious injury, death, and/or property
damage.
This furnace is not designed for use in mobile
homes, trailers or recreational vehicles.

07/15/2004

440 01 2020

(05)

START-UP
CHECK SHEET
For 90+ Furnace
(Keep

this

page

for future

reference)

Dealer Name:
Address:

Business Card Here

City, State(Province),

Zip or Postal Code:

Phone:
Owner Name:

Manual Gas Shut-Off Upstream

Address:

of Furnace/Drip- Leg?

City, State(Province),

YES

Condensate Drain Trapped?

NO

YES

Condensate Drain Connected?

Zip or Postal Code:

NOE_

NO

YES

Transition Pressure switch hose relocated for U/D/H
Model Number:
Application? YES _

NO

Serial Number:
Blower Speed Checked?
Type of Gas:

Natural:

_

LP:

All Electrical Connections Tight?

Which blower speed tap is used?
High Fire __

Gas Valve OK?

Low Fire

YES _

YES _

NO
YES _

NO

NO

or (Cooling).
Measured Line Pressure When Firing Unit:

Temperature of Supply Air: High Fire (°F)__
Low Fire

(°F).__or

or (°C)__
(°C)__

Calculated Firing Rate:(See Checks and Adjustments Section). (Lo)

Temperature of Return Air:

(°F)__

or (°C)__

Temp. Rise Hi Fire (Supply - Return ): (°F)
Lo Fire (Supply - Return ): (°F)

or (°C)__

& (Hi)

Temperature Rise (supply-return

temperature):(°F)__

Measured Manifold Gas Pressure: (Lo) __

or (°C)__
Static Pressure (Ducts): Supply Air

Filter Type and Size:

CO?

Fan "Time OFF" Setting:

CO2 ?

[_

Return

Date of Start-Up:

Fan "Time ON" Setting:.

Dealer

& (Hi) __

Comments:

44001202005

1. Safe Installation

Requirements

FIRE, EXPLOSION, AND ASPHIXlATION

HAZARD

Improper
adjustment,
alteration,
service,
maintanence
or installation
could cause serious
injury, death and/or property damage.
Installation or repairs made by unqualified persons
could result
in hazards
to you and others.
Installation MUST conform with local codes or, in
the absence of local codes, with codes of all
governmental authorities having.jurisdiction.
The information
contained
in this manual is
intended for use by a qualified service agency that
is experienced
in such work, is familiar with all
precautions
and safety procedures
required
in
such work, and is equipped with the proper tools
and test instruments.

adequate

nace as specified
these instructions.

combustion

and ventilation

in "4. Combustion

A.

Venting and
structions.

7, Masonry

Chimney

Venting"of

Always

install

furnace

to operate

within

the furnace's

•

•

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

440 01 2020 05

supply

Install

•

Unit MUST be installed so electrical components
tected from direct contact with water.

and return

in mo-

air ducts.

filter type and size.
are pro-

many years

of safe and dependable

The U.S. Consumer
Product Safety Commission
encourages
installation
of carbon monoxide
alarms. There can be various

injury and/or
and odorless
or when the

Therefore,
to help alert people of potentially dangerous
ca rbon
monoxide
levels, you should have a commercially
available
carbon monoxide
alarm that is listed by a nationally
recognized testing agency in accordance
with Underwriters
Laboratories Inc. Standard
for Single and Multiple Station Carbon
Monoxide
Alarms, ANSI/UL
2034 or the CSA 6.19-01
Residential Carbon Alarming Devices installed and maintained
in
the building or dwelling concurrently
with the gas- fired furnace
installation
(see Note below). The alarm should be installed as
recommended
by the alarm manufacturer's
installation
instructions.
B.

There can be numerous
sources of fire or smoke in a building
or dwelling.
Fire or smoke can cause serious
bodily injury,
death, and/or property
damage.
Therefore,
in order to alert
people of potentially dangerous
fire or smoke, you should have
fire extinguisher
and smoke alarms listed by Underwriters
Laboratories
installed and maintained
in the building or dwelling
(see Note below).

Note:

in-

tended temperature-rise
range with a duct system which
has an external static pressure within the allowable range,
as specified
in "Technical
Support Manual"
of these instructions.

Seal around

•

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

in-

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
"8. Gas Supply and Piping, Final Check"of
these instructions.

•

Carbon
monoxide
can cause serious
bodily
death. Carbon monoxide
or "CO" is a colorless

Air" of

these

is NOT approved
for installation
trailers
or recreation
vehicles.

of

sources of carbon
monoxide
in a building
or dwelling.
The
sources
could be gas-fired
clothes
dryers,
gas cooking
stoves, water heaters,
furnaces,
gas-fired
fireplaces,
wood
fireplaces,
and several other items.

air to the fur-

Combustion
products must be discharged
outdoors.
Connect this furnace to an approved
vent system only, as specified in %. Combustion
and Ventilation Air, 6. Horizontal

This furnace
bile homes,

correct

heating

service providing
it is properly installed and maintained.
However,
abuse and/or improper
use can shorten
the life of the unit and
create hazards for you, the owner.

as speci-

and Ventilation

•

Your unit is built to provide

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

Provide

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

Safety Rules

NOTE: This furnace is design-certified by the CSA International
(formerly AGA and CGA) for installation in the United States and
Canada. Refer to the appropriate codes, along with this manual,
for proper installation.

Install this furnace only in a location and position
fied in "2. Installation"of
these instructions.

•

The manufacturer
of your furnace does not test any alarms
and makes no representations
regarding any brand or type
of alarms.

C.

To ensure safe and efficient
do the following:

operation

of your unit, you should

1.

Thoroughly
read this manual and labels on the unit. This
will help you understand
howyour
unit operates and the hazards involved with gas and electricity.

2.

Do not use this unit if any part has been under water. Immediately call a qualified service technician to inspect the unit
and to replace any part of the control system and any gas control which has been under water.
Never obstruct
the vent grilles,
or any ducts that provide
air to the unit. Air must be provided
for proper combustion
and ventilation
of flue gases.

[_

Have someone
check the structure
frequently
during cold
weather to make sure it is warm enough to prevent pipes
from freezing. Instruct them on a service agency to call to
provide service, if required.

FrozenWater Pipe Hazard

WATER DAMAGE TO PROPERTY HAZARD

-or-

Failure to protect against the risk of freezing could
result in property damage and/or personal injury.
Do not leave your home unattended for long periods
during freezing weather without turning off water
supply
and draining
water pipes or otherwise
protecting
against the risk of frozen pipes and
resultant damage.
Your furnace is designed
solely to provide a safe and comfortable
living environment.
The furnace is NOT designed
to ensure that

3.

Install a reliable remote sensing device that will notify somebody of freezing conditions
within the home.

Winter Shutdown
If you go away during the winter months and do not leave the heat
on in your home, the plastic transition
box and the condensate
trap
on the furnace
must be protected
from freeze
damage.(See
Figure 9 trough Figure 18)
1.

Disconnect

the 5/8" OD rubber

hose from the vent drain fit-

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

ting that is located downstream
of the combustion
blower.
Insert a funnel into the hose and pour four(4) ounces of sanitary type (RV) antifreeze
into the condensate
trap. Reconnect the 5/8" OD rubber hose to the stub on the vent drain

If your furnace remains off for an extended time, the pipes in your
home could freeze and burst, resulting
in serious water damage.

fitting.
2.

If the structure will be unattended
take these
precautions.
1.

during

cold weather

you should

Turn off the water supply to the structure and drain the water
lines if possible and add an antifreeze
for potable water to
drain traps and toilet tanks. Open faucets in appropriate
areas.
-or-

Secure

with the hose clamp.

Disconnect
the 3/4" OD rubber hose from the condensate
trap. Insert a funnel into the hose and and pour four(4)
ounces of sanitary type (RV) antifreeze into the plastic Transition box. Squeeze
the hose together near the end and
quickly reconnect the 3/4" OD rubber hose to the stub on the
condensate
trap. Secure with the hose clamp.

When you return home, your furnace
not necessary
to drain the antifreeze

will be ready to start, as it is
from the furnace.

2. Installation
Location and Clearances
CARBON MONOXIDE POISONING HAZARD

1.

Refer to Figure 1 or Figure 2 for typical installation
and
basic connecting
parts required.
Refer to Figure 4 for typical horizontal
direct vent installation
and basic connecting
parts required. Supply and return air plenums and duct are
also required.

2.

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

Failure to properly vent this furnace or other
appliances could result in death, personal injury
and/or property damage.
This furnace can NOT be common vented or
connected to any type B, BW or L vent or vent
connector, nor to any portion of a factory-built
or
masonry chimney. If this furnace is replacing a
previously
common-vented
furnace, it may be
necessary to resize the existing vent and chimney
to prevent oversizing
problems
for the other
remaining appliance(s). See Venting and Combustion Air Check in the 5. Combusion & Ventilation Air
section.
This furnace MUST be vented to the
outside.

[_1

ate the existing
and furnace

location

based upon the minimum

dimensions

(Figure

clearance

3).

FROZEN AND BURST WATER PIPE HAZARD
Failure to protect
result in property

against
damage

the risk of freezing
could
and/or personal
injury.

Special
precautions
MUST be made if installing
furnace
in an area which may drop below freezing.
This can cause improper
operation
or damage
to
equipment.
If furnace environment
has the potential
of freezing,
the drain trap and drainline
must be
protected.
The use of electric
heat tape or RV
antifreeze
is recommended
for these installations.
(See "Condensate
Trap Freeze Protection
Section")

440 01 2020 05

Installation Requirements

Typical Upflow Installation
Aluminum or non-rusting shield recommended.
(See Vent Termination Shielding for dimensions).

"8" Min.
20' Max.

_1

in same
atmospheric
zone

Couplingon ends of

I_

<_

__
_
ilL.
_

1.

Install

2.

This furnace is NOT to be used for temporary
ings or structures
under construction.

3.

Install furnace as centralized
heat distribution
system.

4.

Install

_iexhaust pipe. Total

(not used on
Inlet Pipe
Single
Pipe
model)

pipe & coupling;ut-

Installation

See VentTermination
Shieldingin VentSection.
_1
Inlet Pipe

_
_

_:_

(not used on_
Single Pipe
model)

_

Coupling on inside
and outsideof wallto

"8" Min.
20' Max.insame

<_

tallyand Vertically

Min.
!

Max.

i

as short as practical.

Air Piping

(See

to the

Vent and

section).

Maintain
clearance
for fire
clearance
of 30" is required
trols and filter.

6.

Use a raised
wet at times.

7.

For downflow installations,
be used under the furnace

non combustible
subbase
must
unless installation
is on a non

combustible
floor surface.
when a coil box or cabinet

This requirement
is used.

safety and servicing.
A front
for access to the burner, con-

base for upflow

furnace

if the floor is damp

applies

or

even

8.

For horizontal
installations,
line contact is permissible
only
between lines formed by intersection
of back and two sides
of furnace jacket, and building joists, studs or framing.

9.

Residential

•

Burners and ignition
the floor.

garage

installations
sources

require:
installed

at least

18" above

Located or physically protected from possible damage by
a vehicle.
10. Local codes may require a drain pan under the entire furnace and condensate
trap when the furnace is installed in
attic application.

Installation Positions

same
osphericzone

Furnace Installation Considerations
The installation
of the furnace for a given application
will dictate the
position of the furnace, the airflow, ductwork connections,
vent and
combustion
air piping. Consideration
must be given to the following:

Condensate
I_, Y/////////////////////////_,
25-23-33a
* Increaseminimumfrom 8" to 18" for coldclimates (sustainedtemperatures
below 0°F),

CARBON MONOXIDE POISONING HAZARD.
Failure to follow safety warnings
exactly could
result in serious injury, death, or property damage.
Do NOT operate furnace in a corrosive atmosphere
containing chlorine, fluorine or any other damaging
chemicals, which could shorten furnace life.
Refer to 3. Combustion
& Ventilation
Air section,
Contaminated
Combustion
Air for combustion
air
evaluation
and remedy.
440 01 2020 05

with respect

This furnace can be installed in an upflow, horizontal
(either left or
right) or downflow
airflow position. DO NOT install this furnace on
its back. For the upflow position, the return air ductwork can be attached to either the left or right side panel and/or the bottom. For
horizontal
and downflow positions, the return air ductwork must be
attached to the bottom. The return air ductwork must never be attached to the back of the furnace.

atmosphedczone

VentPipes MUST
besupport_d Horizon-

as practical

heat of build-

5.

zone

Increaseminimumfrom8 to18 forcoldclimates(sustainedtemperatures
below 0 o F),
25-23-33

level.

the vent pipes

Combustion

Vent Pipes MUST b_
supported
Horizontallyand
Vertically

Typical Downflow

furnace

Trap and Drain Lines

The supplied condensate
trap must be attached
to the furnace
side panel on either the left or right side. For horizontal
installations, the drain trap is vertically
attached to the side panel below
the furnace. A minimum
clearance
of 6" below the furnace is required for the condensate
trap. Downward
slope of the condensate drain line from the condensate
trap to the drain location must
be provided. Adequate
freeze protection of the drain trap and the
drain line must be provided. See "Condensate
Drain Trap"section
for further details.

Leveling
Proper leveling of the furnace must be provided to insure proper
drainage of the condensate
from the furnace. The furnace must be
level to within 1/4" from front to back and from side to side for upflow
and downflow
installations
or top to bottom for horizontal
installations.

Vent and Combustion

Air Connections

On the Dual Certified furnace, the vent and combustion
air pipes
attach to the furnace through the top panel for the upflow and hori-

zontal

installations.

For the downflow

installation,

combustion
air pipes attach to the furnace
locations on the furnace side panels.

the vent

through

and

the alternate

Note: Repositioning
of the combustion
blower is required for the
vent pipe connection
to the furnace through the "right side" panel.
See "Vent and Combustion
Air Piping'section
for further details.

Note: On the Direct Vent furnace, the vent pipe attaches to the furnace through the side panels. The combustion
air pipe attaches to
the top panel or to the alternate
location on the side panel.
On the Single Pipe furnace, the vent pipe attaches to the furnace
through the furnace side panels.

Dimensions

and Clearances
MINIMUM CLEARANCES
TO
COMBUSTIBLE
MATERIALS FOR ALL UNITS

F
__G/AIR
TOP

I

INTAKE

VENI

--=-IE
1

I

_611tr_

ELE TR CAL
1(;1t4

GAS

3"
'24"

ALL SIDES Of SUPPLY PLENUM

1"

SIDES

0

VENT

0

TOP OF FURNACE

1"

"30" clearancerecommendedfor casing removal.

FRONT

Horizontalposition: Line contactis permissibleonly between
linesformed by intersectionsof top and two sidesof furnace
jacket, and buildingjoists, studs or framing.

/

-- 1r/!_
TRAI,_IIIIIREvLEOTW)-

0

FRONT (combustion air openings in
furnace and in structure)
Required For Service

?
LEFT SIDE

REAR

Y ± --

NOTE: Evaporator "A" coil drain pan dimensions
may vary from furnace duct opening size. Always
consult evaporator specifications for duct size
requirements.

T(RAL;
ERNATE) 4_c
UPFLOWIHORIZONTAL_
i

Furnace is designed for bottom return or side
return.

THERMOSTAT
/k_7
2 rt

Return air through back of furnace is NOT allowed.
31/4

i

T
17/8

2151824

47/8

Drawing is representative,
but some models may vary
281/z
3/
T' E

18112

BOTTOM
ALL DIMENSIONS

23118

J

IN INCHES

RIGHT SIDE
TRAP
/(COUNTERFLOW)

37t8

(ALTERNATE)

Unit
Capacity

13116

VENT
TRAP
UPFLOW/HORIZONTAL

*9MPT050F12A
)7/8

*9MPT075F14A
*9MPT100J16A

27
THERMOSTAT
913116

*gMPT125L20A
13114

*gMPV050F12A
*9MPV075F14A

3

*9MPV100J20A

T
21518

*gMPV125L20A

17/8

24

25-23-36b

[_

440 01 2020 OS

Horizontal Furnace Installation
This furnace can be installed horizontally
in an attic, basement,
crawl space, alcove, or suspended
from a ceiling in a basement or
utility room (See Figure 4). Do not install furnace on its back or in
the reverse airflow
versely affected.

positions

as safety

Typical

control

Horizontal

operation

will be ad-

Installation

Inlet Pipe (notusedon SinglePipemodel)

If the furnace is to be suspended
from the floor joists in a crawl
space or the rafters in an attic, it is necessary
to use steel pipe
straps or a n angle iron frame to rigidly attach the furnace to prevent
movement.
These straps should be attached to the furnace with
sheet metal screws and to the rafters or joists with bolts. The preferred method is to use an angle iron frame bolted to the rafters or
joists. (Take caution to allowdoor
panels to be removed for maintenance)
If the furnace is to be installed
in a crawl space, consult
codes. A suitable concrete
pad or blocks are recommended
crawl space
NOTE:

Vent
Pipe

installation

6" bottom

local
for

on the ground.

clearance

required

for condensate

trap.

Thirty (30) inches between the front of the furnace and adjacent
construction
or other appliances
MUST be maintained
for service
clearance.
Condensate

Keep all insulating
materials clear from Iouvered
materials
may be combustible.

Trap

door.

Insulating

The horizontal
furnaces
may be installed directly on combustible
wood flooring or supports
as long as all required furnace clearances are met. See Figure 4.
This furnace MUST NOT be installed directly on carpeting or tile or
other combustible
material other than wood flooring or supports.

25-23-34
NOTE: 5" bottom clearance required for condensate

3. Combustion
For Single

trap.

& Ventilation

Air
Air Openings and Connecting Ducts

Pipe Installation

CARBON MONOXIDE POISONING HAZARD
Failure
to provide
ventilation
air could
injury.

adequate
combustion
and
result in death and/or personal

Use
methods
described
combustion
and ventilation

here
air.

to

provide

Furnaces
require ventilation
openings
to provide sufficient air for
proper combustion
and ventilation
of flue gases. All duct or openings for supplying combustion
and ventilation air must comply with
National Fuel Gas Code, NFPA54/ANSI
Z223.1, 2002 (or current
edition)

and applicable

provisions

of local building

codes.

This furnace can NOT be common vented or connected
to any
type B, BW or L vent or vent connector, nor to any portion of a factory- built or masonry chimney. If this furnace is replacing a previously common-vented
furnace,
it may be necessary
to resize the
existing vent and chimney to prevent oversizing
problems
for the
other remaining
appliance(s).
See "Venting and Combustion
Air
Check"in
this section, This furnace MUST be vented to the outside.

440 01 2020 05

For horizontal
installation
over a finished living space. A field fabricated auxiliary
drain pan with drain pipe is required to prevent
damage by overflow due to blocked condensate
drain.

1.

Total input rating for all non direct vent gas appliances
MUST be considered
when determining
free area of openings.

2.

Connect

3.

When screens are used to cover
no less than 1/4" mesh.

4.

The minimum
dimension
NOT be less than 3".

5.

When sizing grille or louver, use the free area of opening. If
free area is NOT stamped or marked on grill or louver, assume a 20% free area for wood and 60% for metal.

ducts

or openings

directly

to outside.

openings,

of rectangular

they MUST
air ducts

be

MUST

Confined Space Installation
NOTE: A confined space is defined as an area with less than 50
cubic feet per 1,000 BTUH input rating for all gas appliances
installed in the area.

Requirements
1.

Provide confined
space with sufficient air for proper combustion and ventilation
of flue gases using horizontal
or vertical ducts or openings.

2.

Figure 5 illustrate how to provide combustion
and ventilation air. A minimum
of two permanent
openings,
one inlet
and one outlet, are required.

[_

Outside

Air (This

is ONLY a guide.

SubJect

to codes

of country

having

jurisdiction.)

ThisinstallationNOTapprovedin Canada
Gas Vent

Soffit Vent

G_ gen _Gable
/
fVentilatedAttic_

Vent

Outlet

I1

I I

Air(l)

U _-]

_

I_'_[

Minimum

_

_

Alternate Inlet Air (1)

I

1_1

" ( )

I

,I

One Inlet and One Outlet Air Supply

May be in any Combination

_

I

Inlet

is Required

Shown

Inlet Air OpeningMust be Within12" offloor
Inlet
Air (1)

Inlet
Air (2)

Outlet Air Opening Must be Within12" of ceiling
(1) 1 Square Inch per 4000 BTUH
(2) 1 Square Inch per 2000 BTUH

3.

One opening MUST be within 12" of the floor and the second opening within 12" of the ceiling.

4.

Size openings

5.

Horizontal duct openings require 1 square inch of free area
per 2,000 BTUH of combined
input for all gas appliances
in
area (see Table 1).

6.

and ducts

per Table

1.

Vertical duct openings
or openings
directly to outside require 1 square inch of free area per 4,000 BTUH for combined input of all gas appliances
in area (see Table 1).

Free Area
BTUH
Input
Rating

Vertical Ductor openings
to outside(4,000 BTUH)

Round Duct
(4,000 BTUH)

50,000

25 sq. in.

12.5 sq. in.

4"

75,000

37.5 sq. in.

18.75 sq. in.

5"

100,000

50 sq. in.

25 sq. in.

6"

125,000

62.5 sq. in.

3125 sq. in.

7"

150,000

75 sq. in.

EXAMPLE:

Determining

Appliance

1 Appliance

37.5 sq. in.

2

CARBON MONOXIDE POISONING HAZARD
Failure to supply
additional
air by means of
ventilation
grilles or ducts could result in death
and/or personal injury.
An unconfined
space
or homes
with
tight
construction
may not have adequate air infiltration
for proper combustion and ventilation of flue gases.
Most homes will require additional

MinimumFreeArea Requiredfor Each Opening
HorizontalDuct
(2,000 BTUH)

Unconfined Space Installation

An unconfined
space is defined as an area having a minimum volume of 50 cubic feet per 1,000 Btuh total input rating for all gas ap)liances in area. Refer to Table 2 for minimum
area required.

BTUH Input
Rating

7"

Free Area
Total Input

1 Appliance

2

Total Input

50,000
78,000

490

114,000

712

commencing

within

the appliance.
The opening shall directly communicate
with the
outdoors
or shall communicate
through a vertical or horizontal
duct to the outdoors or spaces (crawl or attic) that freely communicate with the outdoors,
and shall have a minimum
free area of:
1 sq. in per 3000 Btu per hr. of the total input rating
equipment
located in the enclosure,
and

of all

Not less than the sum of the areas of all vent connectors

[_

space.

968

X 50 Cubic

Ft, =

1,400
8' Ceiling

= 175 Sq, Ft.
Height

12" of the top of the

enclosure,
shall be permitted
where the equipment
has clearances of at least 1" from the sides and back and 6" from the front of

the confined

Feet

NOTE: Square feet is based on 8 foot ceilings.

28,000 BTUH
1,000

opening,

Area in Square
312

EXAMPLE:

100,000 + 30,000 = (130,000 + 2,000) = 65 Sq. In. Horizontal
One permanent

Minimum

155,000

100,000 + 30,000 = (130,000 + 4,000) = 32.5 Sq. In. Vertical
Appliance

air.

in

NOTE: Refer to definitions in section titled Unusually Tight
Construction. If any one of the conditions apply, the space MUST
be considered confined space regardless of size.
1.

Adjoining rooms can be considered part of an unconfined
area if there are openings without doors between rooms.

2.

An attic or crawl space may be considered an unconfined
space provided there are adequate ventilation openings directly to outdoors. Openings MUST remain open and NOT
have any means of being closed off. Ventilation openings to
outdoors MUST be at least 1" square of free area per 4,000
BTUH of total input rating for all gas appliances in area.

440 01 2020 05

3.

Install

air intake

a minimum

of 12" above

maximum

snow

level and clear of any obstruction.
Duct or ventilation
opening requires one squa re inch of free area per 4,000 BTU H of
total input rating for all gas appliances
in area.
4.

Air inlet
screen.

MUST

be screened

with

not less than

114" mesh

CARBON MONOXIDE POISONING HAZARD
Failure
to follow
the steps
outlined
below
for each
appliance
connected
to the venting
system
being placed
into
operation,
could
result
in carbon
monoxide

Unusually Tight Construction

poisoning

In unconfined
spaces, infiltration
may be adequate
to provide air
for combustion,
ventilation
and dilution of flue gases. However, in
buildings with unusually tight construction,
additional air MUST be
provided using the methods described
in section titled Confined
Space Installation:

The following

Unusually

tight construction

is defined

as: Construction

with

1.

Walls and ceilings exposed
to the outside have a continuous, sealed vapor barrier. Openings are gasketed
or sealed
and

2,

Doors

3.

Other openings
around window
floors, between
penetrations
for

and openable

windows

are weather

stripped

and

are caulked or sealed. These include joints
and door frames, between
sole plates and
wall-ceiling
joints, between wall panels, at
plumbing,
electrical
and gas lines, etc.

Ventilation Air

connected
operation,
venting

or death:
steps

shall

be followed

to the venting
system
while all other appliances
system

are not

1. Seal any unused

for each appliance
being
placed
into
connected
to the

in operation:

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 CSA B149.1, Natural Gas and Propane Installation
Code 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.

Some provincial codes and local municipalities
require ventilation
or make-up
air be brought into the conditioned
space as replacement air. Whichever
method is used, the mixed return air temperature across the heat exchanger
MUST not fall below 60°F or flue
gases will condense
in the heat exchanger.
This will shorten the
life of the heat exchanger
and possibly void your warranty.

4. Close

Venting and Combustion

6. Followthe
lighting instructions.
Placethe
appliance
being
inspected
into operation.
Adjust the thermostat
so appliance is operating
continuously.

Air Check

The following information
is supplied to allow the installer to make
adjustments
to the setup of existing appliances,
IF REQUIRED,
based on good trade practices, local codes, and good judgement
of the installer.
Manufacturer
does NOT take responsibility
for
modifications
made to existing equipment.
NOTE:
If this installation
replaces
an existing furnace
from a
commonly vented system, the original venting system may no longer be sized to properly vent the attached appliances.
An improperly sized venting system may cause the formation
of condensate
in the vent and the leakage or spillage of vent gases. To make sure
there is adequate
combustion
air for all appliances,
MAKE THE
FOLLOWING
CHECK.

5. Turn
to the
range
ing at
fan.

fireplace

dampers.

on clothes dryers and any appliance
not connected
venting system. Turn on any exhaust fans, such as
hoods and bathroom exhausts, so they are operatmaximum speed. Do not operate a summer exhaust

7. Test for spillage

from draft hood equipped

at

8. If improper venting is observed,
during any of the above
tests, the venting
system
must be corrected
in accordance
with
the
National
Fuel
Gas
Code,
ANSI
Z223.1/NFPA
54 and/or CSA B149. 1, Natural
Propane Installation
Code.

Gas and

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

Vent Check

appliances

the draft hood relief opening after 5 minutes of main burner
operation.
Use the flame of a match or candle. (Figure
6)

burning

ap-

,,--.q
Vent Pipe'---_U_
Typical Gas

Water Heate[_l

/

If flame pulls towards
sufficient
venting.

440 01 2020 05

S

/

For Two Pipe Installation

Draft Hood

_'_

i
draft

i

' V_l--hood,

this

Match
indicates

This furnace can NOT be common vented or connected to any
type B, BW or Lvent or vent connector, nor to any portion of a factory-built or masonry chimney. Ifthis furnace is replacing a previously common-vented furnace, it may be necessary to resize the
existing vent and chimney to prevent oversizing problems for the
other remaining appliance(s). See "Venting and Combustion Air
Check"in this section, This furnace MUST be vented to the outside.

[_1

4. Vent and Combustion

Air Piping
2,

CARBON MONOXIDE POISONING HAZARD.
Failure to properly
vent this furnace
death and/or personal
injury.
Use methods
described
and ventilation
air.

could

here to provide

result

in

This furnace is certified as a category IV appliance.
This furnace
can be installed as a direct vent furnace using outside air for combustion or the furnace can use air from inside the structure for com-

atmospheric

Contaminated

pressure

zone as the vent

Combustion

4.

Use of vertical
piping is preferred
because
there will be
some moisture
in the flue gases that may condense
as it
leaves the vent pipe (See 5peciallnstruction
ForHorizontal
Vents).

5,

The vertical vent pipe MUST be supported
so that no weight
is allowed to rest on the combustion
blower.

6.

Exhaust vent piping or air inlet piping diameter MUST NOT
be reduced.

7.

All exhaust
vent piping from the furnace
to termination
MUST slope upwards.
A minimum of 1/4" per foot of run is
required to properly return condensate
to the furnace drain

Use DWV type long radius elbows whenever
possible,
as
they provide for the minimum slope on horizontal
runs and
they provide less resistance
in the vent system. If DWV elbows cannot be used, use two, 45 ° elbows when possible.
On horizontal
runs the elbows can be slightly misaligned
to
provide the correct slope.

Air

Installations
in certain areas or types of structures will increase the
exposure to chemicals
or halogens
that may harm the furnace.

•

Commercial

•

Buildings

with

•

Furnaces

installed

in laundry

•

Furnaces

installed

in hobby

•

Furnaces

installed

•

Permanent

wave

•

Chlorinated

waxes

•

Chlorine

•

Water

•

De-icing

•

Carbon

•

Halogen

•

Cleaning

•

Printing

•

Hydrochloric

•

Sulfuric

Acid.

•

Solvent

cements

•

Antistatic

fabric softeners

•

Masonry

acid washing

where

based

areas.

for hair.

The minimum

The piping can be run in the same chase or adjacent to supply or vent pipe for water supply or waste plumbing.
It can
also be run in the same chase with a vent from another 90+
furnace.

pool chemicals.

chemicals.

14.

type refrigerants.
(such as perchloroethylene).

inks, paint removers,

varnishes,

is 2'.

The vent outlet MUST

be installed

atmospheric

zone as the combustion

can be installed
that:

•

Both the exhaust
chimney.

vent and air intake

•

No other
vented

•

dryers.

materials.

Air Piping Guidelines

and termination

and air inlet pipe by referring
guidelines
in this Section.

gas fired

and

16.

appliance

in the same
air inlet.

in an existing

unused

run the length

or fireplace

(solid

of the

fuel)

is

into the chimney.

The top of the chimney MUST be sealed flush or crowned
up to seal against rain or melting snow so ONLY the piping
protrudes.
The termination
tained.

for the vent pipe

to all of the instructions

to terminate

The vent system
chimney provided

and glues.
for clothes

pressure

15.

etc.

acid.

the best routing

pipe run length

NOTE: In NO case can the piping be run in a chase where
temperatures
can exceed 140 ° F. or where radiated heat
from adjacent surfaces
would exceed 140 ° F.

tetrachloride.

Determine

six feet

13.

salts or chemicals.

solvents

every

12.

and cleaners.

swimming

softening

storage

be supported

pipe length is 40' total in the inlet or outlet
side of the system. Up to five, 90 ° elbows can be used on the
inlet orthe outlet. With the Concentric
Vent Termination
Kits

rooms.

near chemical

MUST

11. The maximum

or craft rooms.

solutions

pipe runs
accessible.

(NAHAO01CV
or NAHAOO2CV),
the maximum
pipe length
is 35' with 4 90 ° elbows. If more elbows are required, reduce
the length of both the inlet and exhaust pipes 5' for each
additional
elbow used. (See Table 3 or Table 4).

NOTE: All vent piping MUST be installed in compliance
with local
codes or ordinances,
these instructions,
good trade practices, and
codes of country having jurisdiction.

[_

10. All vertical

pools.

Vent and Combustion

1.

All horizontal
pipe runs MUST be supported
at least every
five feet with galvanized
strap or other rust resistant material. NO sags or dips are permitted.

buildings.
indoor

(pipe

system.

pipe.

The following areas or types of structures
may contain or have exposure to the substances
listed below. The installation
must be
evaluated
carefully
as it may be necessary
to provide outside air
for combustion.

for the vent pipe and air inlet

Loosely assemble all venting parts without adhesive
joint cement) for correct fit before final assembly.

bustion. The INLET air pipe is optional.
If combustion
air comes
from inside the structure, adequate make u p air MUST be provided
to compensate
for oxygen burned. See Confined
Space Installation in the Combustion
and Ventilation
Air chapter. If combustion air is drawn from outside the structure,
it MUST be taken from
the same

the size required

3.

combustion

Dual Certified (*9MPT & *9MPV Models)

Determine
pipe.

Furnace
ameter
installed
trapped

clearances

shown

in Figure

7 are main-

applications
with vertical vents requiring
increaser
fittings
must
have increaser
in vertical portion of the vent. Condensate
in the vent if the vent diameter
is increased

having an elbow turned
tripping of the pressure

upward.
switch.

This could cause

vent difittings
will be
prior to
nuisance

440 01 2020 05

Piping Insulation Guidelines

NOTE:
shown

It is allowable
to use larger diameter
pipe and fitting
in the tables but not smaller diameters
than shown.

NOTE: Use closed cell, neoprene insulation or equivalent.
If Fiberglass or equivalent
insulation is used it must have a vapor barrier.
Use Rvalues of 7 upto 10', R-11 if exposure exceeds 10'. If Fiberglass insulation
is used, exterior to the structure,
the pipe MUST
be boxed in and sealed against moisture.
1.

.When the vent or combustion
exceeds 30", or if an exterior
zontal
MUST

vent to get above
be insulated.

Pipe Diameter
Dual Piping
50,000

levels,

the exterior

100,000

portion

3.

When combustion
air inlet piping is installed above a suspended ceiling, the pipe MUST be insulated
with moisture
resistant
insulation
such as Armaflex
or other equivalent
type of insulation.
Insulate combustion
air inlet piping
mid spaces such as basements.

when

run in warm,

hu-

Sizing Combustion Air and Vent Pipe
Consult Table 3 or Table 4 to select the proper diameter exhaust
and combustion
air piping. Exhaust and combustion
air piping is
sized for each furnace Btuh size based on total lineal vent length
(on inlet
1.

or outlet

Btuh

Furnace

Btuh

Furnace

40' & (5) 90° elbows with 3" PVC pipe
Elbows
If more

are DWV
than

both the inlet
used.

five

Long

Radius

elbows

are required,

and exhaust

*Feet of pipe is whichever
or outlet
side.

For

"Concentric

"Section

Type for 2" and

pipes

the

length

5' for each additional

pipe run is the longest,

Termination

11" in this

reduce

3" vents.

either

Kit" Venting

of

elbow

inlet

table, see

manual.

required.

Vent Termination Clearances

required.

Single
Pipe Installation-If
appliance,
(single outlet
Table 3. The table shows
allowed

3.

of 90 ° elbows

Double
Pipe Installation-If
installing as a direct-vent
appliance, consult Table 4 to select the proper diameter exhaust and combustion
air piping. Exhaust and combustion
air piping is sized for each furnace Btuh size based on total
lineal vent length (on inlet oroutlet
side), and number of 90 °
elbows

2.

side), and number

Furnaces

40' & (5) 90° elbows with 3" PVC pipe
125,000

2.

Btuh

Table
ONLY

40' & (5) 90 ° elbows with 2" PVC pipe or

air pipe height above the roof
vertical riser is used on a hori-

snow

& 75,000

than

with any given

installing
as a non-direct
vent
pipe and no inlet pipe) refer to
the maximum
number of elbows

pipe diameter

Use of Elbows-Two
45 ° elbows
90 ° elbow. The elbow or elbows

and length

of run.

can be substituted
for one
used for vent termination

outside the structure ARE counted, including elbows needed to bring termination
above expected snow levels. The elbow inside the furnace on the *9MPD IS NOT included in the

CARBON
MONOXIDE
EXPLOSION HAZARD.

Pipe Diameter Table
Single Piping ONLY
50,000

& 75,000

Btuh

Furnaces

40' & (5) 90° elbows with 2" PVC pipe or
100,000

Btuh

Btuh

AND

Inlet and outlet pipes may NOT be vented directly
above each other.

Determine
termination
locations based on clearances
specified in following steps and as shown in Figure 7, Figure 8,
Figure 20, through Figure 27.

For "Concentric
Figure 48, Figure
in this manual.

Termination
49, Figure

This

is Dual

Furnace

40' & (5) 90 ° elbows with 3" PVC pipe
125,000

FIRE

Failure to properly vent this furnace could result in
death, personal injury and/or property damage.

1.

count.

POISONING,

furnace

Kit"clearances,
50 and Figure

Certified

and

can

see Figure
51 in "Section

47,
10"

be installed

as a

single pipe appliance
(all combustion
from inside the structure) or as a direct vent appliance where all combustion
air is
taken from outside the structure.

Furnace

40' & (5) 90 ° elbows with 3" PVC pipe
Elbows
If more

are DWV
than

both the inlet
used.

440 01 2020 05

five

Long
elbows

and exhaust

Radius

Type for 2" and

are required,
pipes

reduce

5' for each

3" vents.
the

additional

length

3.

For Single Pipe installation
mination
clearances.

refer

to Figure

8 for vent ter-

4.

For Direct Vent installation,
mination.

refer to Figure 7 for vent ter-

of

elbow

[_1

Item
A

Clearance

U.S. Installation (2)

Canadian Installation (1)

Description

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

12" (30cm)#

12" (30cm)

6" (15 cm) for appliances _< 10,000 BTUH (3kW), 12" (30
cm) for appliances > 10,000 Btuh (3 kW) and _<100,000 Btuh

6" (15 cm) for appliances _< 10,000 BTUH (3kW), 0" (23 cm)
for appliances > 10,000 Bmh (3 kW) and _<50,000 Btuh (15

(30 kW), 36" (91 cm) for appliances

kW), 12" (30 cm) for appliances

anticipated snow level
B

Clearance to a window or door thai may be opened

C

Clearance to a permanently

D

Vertical clearance to a ventilated soffit located above the

> 100,000 Btub (30 kW)

> 50,000 Btuh (15 kW)

closed window

terminal within a horizontal distance of 2' (61cm) from the
centedine of the terminal
E

Clearance to an unventilated

P

Clearance to an outside corner

G

Clearance to an inside comer

H

Clearance to each side of the centefline extended above

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

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

electrical meter or gas service regulator assembly

assembly

assembly

I

Clearance to service regulator vent outlet

3' (91 cm)

J

Clearance to non-mechanical

6" (15cm)forappliances_<10,000BTUH(3kW),0" (23cm)
for appliances> 10,000Btuh (3 kW) and _<100,000Btuh (30
kW) and _<50,000 Btuh (15kW), 12" (30 cm)for appliances
> 50,000 Bmh (15kW)

for appliances > 10,000 Btuh (3 kW) and _<50,000 Btuh (15
kW), 12" (30 cm) for appliances > 50,000 Bluh (15 kW)

3' (91 cm) above if within 10' (3m horizontally)

the combustion

soffit

air supply inlet _o building or

air inlet to any other appliance

6" (15cm)forappliances_ 10,000 Btuh (3 kW) and _<100,000 Btuh

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

> 100,000 Btuh (30 kW)

closed window
*

terminal within a horizontal distance of 2' (61cm) from the
centerline of the terminal
Clearance to an unventilated

soffit

*

F

Clearance to an outside corner

*

G

Clearance to an inside comer

*

H

Clearance to each side of the centedine extended above

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

3' (01 cm) within 15' (4.5 m) above the meter/regulator

eleclrical meter or gas service regulator assembly

assembly

assembly

I

Clearance to service regulator vent outlet

3' (91 cm)

J

Clearance to non-mechanical

6" (15cm)forappliances_<10,OOOBTUH(3kW),12" (30
cm) for appliances> 10,000 Btuh (3 kW) and _<100,000Btuh
(30 kW), 30" (91 cm) for appliances> 100,000Btuh (30 kW)

4' (1.2 m) below or to the side of opening: 1' (30 cm) above

3' (91 cm) above if within 10' (3m horizontally)

the combustion

air supply inlel to building or

air inlet to any other appliance

K

Clearance to a mechanical air supply inlel

6' (1.83m)

L

Clearance under a veranda, porch, deck, or balcony

12" (30 cm) +

M

Clearance to each side of the centedine extended above or

*

opening.

below vent terminal of the furnace to a dryer or water heater
vent, or other appliance's direct vent intake or exhaust.
N

3' (91 cm)

Clearance from a plumbing vent stack

3' (91 cm)

(1.)

In accordance

with the current CSA B149.1, Natural Gas and Propane

(2.)

In accordance

wilh the current ANSI Z223.1/NFPA

Installation Code

#

18" (46 cm) above roof surface

+

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

04, National Fuel Gas Cede

For clearances not specified in ANSI Z223.1/NFPA 04 or CSA B140.1, clearances shall be in accordance
installation instructions.

with local installalion codes and the requirements

of the gas supplier and the manufacture's

Notes:
1.

2.

The vent for this appliance shall not terminale
a.

Over public walkways;

b.

Near soffit vents or crawl space venta or other areas where condensate

or

c.

Where condensate

When locating vent terminations,
Recirculafion

440 01 2020 05

or vapor could create a nusiance or hazard or property damage; or

vapor could cause damage or could be detrimental to the operafion of regulalors,
consideration

can cause poor combustion,

relief valves, or other equipmenL

must be given to prevailing winds, location, and other conditions which may cause recirculation

inlet condensate

problems, and acceleraled

of the combustion

products of adjacent vents.

corrosion of the heat exchangers.

[_

CondensateDrain Trap

A condensate
sump pump MUST be used if required by local codes, or if no indoor floor drain is available.
The con-

This furnace removes both sensible and latent heat from the products of combustion.
Removal of the latent heat results in con-

densate
pump
condensate.

densation

of the water vapor. The condensate

is removed

from the

furnace through the drains in the plastic transition
and the vent fitting. The drains connect to the factory installed internally mounted
condensate
drain trap on the left or right side of the furnace.

2.

hose from either the gutter or the white PVC Tee Trap. Using a funnel pour eight (8) ounces of water into 1/2" ID drain hose.Water
will
flow through the drain hose and into the condensate
drain trap.
This will prime both the vent and the transition
sides of the trap. Reconnect the 1/2, ID drain hose to the original component,
either the
gutter

or the PVC Tee Trap.

The condensate
drain trap supplied
with the furnace
MUST be
used. The drain connection
on the condensate
drain trap is sized
for 3/4" PVC or CPVC pipe, however alternate 1/2" CPVC (nominal
5/8" O.D.) or vinyl tubing with a minimum
inner diameter
(I.D.) of
5/8" may also be used, as allowed by local codes. Alternate
drain
pipes

and hoses

may be used as allowed

See Figure

18 for proper routing

DO NOT trap the drain line in any other location
densate drain trap supplied with the furnace.

than at the con-

If possible DO NOT route the drain line where it may freeze. The
drain line must terminate at an inside drain to prevent freezing of
the condensate
and possible property damage.

[_

approved

for

use

with

acidic

A plugged condensate
drain line or a failed condensate
pump will allow condensate
to spill. If the furnace is installed

3.

If the auxiliary switch in the condensate
pump is used, the
furnace may shut down dueto a blocked condensate
line or
failed pump. To prevent frozen water pipes see the "Frozen
Water Pipe Hazard" section on Page 4 of this manual.

FROZEN AND BURST WATER PIPE HAZARD
Failure
serious

to do so could result in burst water pipes,
property
damage and/or personal
injury.

If a condensate
condensate
drain
furnace
to shut

pump
is
or a failed
down.
Do

installed,
a plugged
pump may cause the
not leave the home

unattended
during freezing weather
without
turning
off water
supply
and
draining
water
pipes
or
otherwise
protecting
against the risk of frozen pipes.

by local codes.

The drain line must maintain a 1/4" per foot downward slopetoward
the drain. 1/4" per foot is recommended.
Installation
of an overflow
line is recommended
when the 1/4" per foot slope to the condensate drain cannot be maintained.
and installation
of the overflow.

be

where a condensate
spill could cause damage, it is recommended that an auxiliary safety switch be installed to prevent operation of the equipment
in the event of pump failure
or plugged drain line. If used, an auxiliary
safety switch
should be installed in the R circuit (low voltage) ONLY.

The startup of a new furnace will involve a cycle or two of the furnace to properly
prime the condensate
trap with water. Until the
trap is fully primed, some condensate
will be pulled into the combustion blower. The furnace may cycle on the pressure switch connected to the plastic transition
box due to condensate
buildup.
After the trap is primed, the condensate
will start draining from the
furnace. The combustion
blower will clear out any remaining condensate in the blower housing through the vent fitting downstream
of the blower. Note that the condensate
trap can also be primed by
pouring water into the 1/2" drain hose. Remove the1/2" ID drain

must

Condensate Drain Trap Freeze Protection
Special precautions
MUST be made if installing furnace in an area
which may drop below freezing. This can cause improper operation or damage
to the equipment.
If the the furnace environment
has the potential of freezing, the drain trap and drain line must be
protected.
Use 3 to 6 watt per foot at 115 volt, 40 ° F self-regulating
shielded and waterproof
heat tape. Wrap the drain trap and drain
line with the heat tape and secure with the ties. Follow the heat
tape manufacturer's
recommendations.

440 01 2020 05

Upflow Installations

Top Vent

vo,,ow
orb,ao,
P,as,
io

SL;me
Mode,s

Caps(2)

II

_1

_

Si t le Pressure

Switch

/
©/

\\

_//_

L_

_))_

l/

l

1/2"

ID Drain

DrainTee_

I

_

Hose & Clamps_
_

1

I

3
/

/16

,

IDRubberTube

_

5/e"ID Hose_

____
I

_i

1

!__

Drain Connector Black PVC

__

(Looseparts bag)

3/4" PVCX 1/2" CPVC

(Looseparts bag)
_

Casing Grommet

__
_

_

Drain Line Vent Tee 314" PVC or
1/2" CPVC(Field supplied)

25-24-42
Drain Tube(& Clamps) Black Rubber /8 ID,
Cut length to fit (Loose parts bag)

Upflow
Remove
will exit.
Install
parts
Install

Installations

Top

casing

grommet

(black

rubber

the 1/2" CPVC

parts

street

bag) as shown

Cut the black
fit between
Clamp

(See Figure 9)

casing where Drain Tu be

5/8" ID grommet

- in loose

bag)
elbow

Install the black PVC tube connector
loose

Vent

plug from the side of the furnace

(3/4" PVC x 1/2" CPVC

in the illustration

Trap and tube

connector

of the Drain

Tube

from

above.

through
using

elbow to the Trap using appropriate

cleaner

Connect the Tee trap and the main drain line exiting the casing as
shown Figure 18.

of Trap

Drain Tube (5/8" ID - in loose parts bag) to length to

both ends

440 01 2020 05

on discharge

Glue the CPVC street
and solvent cement.

grommet.

clamps

provided.

Note: It is recommended
that all PVC piping and fitting connections be fit up and inspected
before final cementing.
Trap must be
primed before operation.
tions are securely clamped.
bag) may be installed
tem.

Verify all condensate
drain connecA coupling and clamps (in loose part

as shown

for future servicing

of the vent sys-

[_

Upflow

Installations

Vent

thru

Left

Side

. Yellow or black Plastic
Cap

@

On Some Models
ONLY

2" PVCCoupling

Coupling & Clamps
VentDrain
& Clamps

Either: ThePVC
Drain Teeor a field
supplied2" PVCTee
Dual Pressure

Switch

Detail

Sin qle Pressure

Switch

" ID RubberTube

Tee Trap White PVC
(loose parts hag)

DrainConnector BlackPVC
3/4"PVCX 1/2" CPVC
(Looseparts hag)

Black(Move from
bottomof drain tee
if installed)

s/8"ID Hose
& Clamps

SIDE VIEW
//_otate

downward

Casing Grommet
sis"ID
(Looseparts bag)
NOTE'_.Bu_]1-in channel will
be angled 5° to 10° also.

Drain LineVent Tee 3/4" PVC or 1/2" CPVC (Fieldsupplied)

Upflow

Installations

Vent

thru

Left

Side

25-24-43

(See Figure 10)

Remove
Drain Tee from inducer discharge
and remove
black
Drain Tube (1/2" ID) from bottom of Drain Tee. (*9MPT or V models

Cut the black Drain Tube (5/8" ID - in loose parts bag) to length to
fit between Trap and tube connector
through grommet.

only)

Clamp

Install

Vent Pipe grommet

in side of casing.

Cut an appropriate
length of 2" PVC pipe long enough
cabinet and connect the vent drain to either:
•

A 2" PVC coupling
models)

fastened

Install

Tee trap into bottom

of tee.

Install

the 1/2" CPVC

elbow

Install the black
loose

[_

parts

street

onto the Drain Tee (*9MPT

PVC drain connector

bag) as shown

to exit the

on discharge

in the illustration

above.

Glue the CPVC street
and solvent cement.
Connect

or V

Tube

using

clamps

provided.

elbow to the Trap using appropriate

the Tee trap and the main drain line exiting

shown

in Figure

Note:

It is recommended

cleaner

the casing

as

18.
that all PVC piping

and fitting

connec-

tions be fit up and inspected
before final cementing.
Both the internal Trap and the external
Tee Trap must be primed
before
operation.
Verify all condensate
drain connections
are securely

of Trap

( 314', PVC x 1/2" CPVC

both ends of the Drain

from

clamped.
installed

A coupling
and clamps
(in loose part bag) may
as shown for future servicing
of the vent system.

be

440 01 2020 0S

All Models Vent thru Right Side

On Some Models

2" PVC Coupling

VentDrain
& Clamps

Either:The PVC
Drain Tee or a field
supplied 2" PVC Tee
Single

Dual Pressure

Pressure

Switch

Detain

Switch

Tee Trap White PVC

%,
& Clamps
ElbowsTubes (2) & Clamps Black,
112"ID (loose parts bag)
Barbed Coupling, 1/2" OD
Drain Line Vent Tee 314"PVC
CPVC(Field supplied)
SIDE VIEW
/,_Rotat

e downward

Drain Connector Black PVC
PVCX 112"CPVC
(Loose parts bag)

Grommet
NOTE'r. Built-in channel will

Black Rubber 5/8" CPVC
(Loose parts bag)

he angled 5° to 10° also.

All

Models

Disconnect

Vent

the black

thru

Right

Drain Tube

Side

between

(See Figure 11)

the drain vent and the

Trap.

Install
parts

Rotate the inducer
inducer attachment
screws

180 ° for a right side vent after loosening the 4
screws.
Reinstall and retighten
the inducer

to 20" pounds

25-24-44

torque.

casing

grommet

(black

rubber

Install

the 1/2" CPVC

street

elbow

on discharge

Install the black PVC tube connector
loose

5/8" ID grommet

- in loose

bag)

parts

bag) as shown

of Trap

( 3/4' , PVC x 1/2" CPVC

in the illustration

from

above

1 ,
Using the /2' OD barbed coupling in the loose parts bag connect
1 ,
together with the 2 short /2' ID elbowtubes
and connect the lower

Cut the black Drain Tube (5/8" ID - in loose parts bag) to length to

discharge
port of the vent drain to the Trap. Secure
with clamps.

Clamp

Install

the vent pipe grommet

all connections

Install

A 2" PVC coupling
models)

into the casing

Tee Trap into bottom

Remove
will exit.

fastened

section

onto the

440 01 2020 05

Drain

to exit the

Tee (_9MPD

of Tee.

plug from the side of the furnace

Trap and tube connector

both ends of the Drain

Glue the CPVC street
and solvent cement.

Cut an appropriate
length of 2" PVC pipe long enough
cabinet and connect the vent drain to either:
•

fit between

casing where Drain Tube

Tube

through
using

grommet.

clamps

provided.

elbow to the Trap using appropriate

Connect the Tee trap and the main drain line exiting
shown in Figure
18.

cleaner

the casing

as

Note:
It is recommended
that all PVC piping and fitting connections be fit up and inspected
before final cementing.
Both the internal Trap and the external
Tee Trap must be primed
before
operation.
Verify all condensate
drain connections
are securely
clamped.
A coupling
and clamps
(in loose part bag) may be
installed

as shown

for future

servicing

of the vent system.

[_

Downflow

Left Side Vent and Trap
SIDE VIEW

Cap

/,_'_r_Rotate

II
Coupling & Clamps

downward

/ tol0o

.._

!Optiona,

NOT_

be angled 5° to 10° also.

Dual Pressure

Switch

11

supplied2" PVCTee

%"ID

_
-

Tee Trap White PVC

RubberTube
/On
/ONLY

[_

Some Models

Ooose
pa.s
bag
Single Pressure

Switch

Detail

,_1
_1
_1
4/

)) I
_1

FlexibleTubingConnector,
Elbow(1)_
WARNING
MoveCaps_
totopof
Drain

3116"OD (loose parts bag)
Relief Tube,
Extension Black,
3/16"ID Cut to fit
(It(loose
parts bag)
t_

trap

Trap Connection

_t

a_ePd
e(_s
T

Drain TubeBlack,5/8" ID Corrugated/
Cut at straight section
/

Leaveroom for clamp

Downflow

Left

Remove the
and retighten
Disconnect

Side

Vent

_

Preassemble &
insert into furnace

Cut Here

and Trap

25-24-45

(SeeFigure 12)

inducer mounting
screws,
rotate the inducer
the inducer screws to 20" pounds torque.
the hoses

from the Trap assembly,

and Trap mounting bracket from
cover plate and gasket provided
hole from the burner compartment
secure with screws.

and remove

180 °

Trap

the blower compartment.
Using
in the loose parts bag, cover the
to the blower

compartment

and

Move the caps to the top of the Trap and mount the Trap externally
to the left side of the unit using the 2 screws provided.
Cut the 518" ID corrugated
hose as shown above and fasten the 90 °
bend end to the Trap and fasten the straight end to the transition
drain.

Secure

Reconnect

both connections

the 1/2" ID drain

with clamps.

hose from the vent drain to the Trap

and secure with a clamp. In some cases, additional
length will be
required for this hose. Use the Black plastic 1/2" OU barbed coupling and a suitable section of 1/2" ID hose to make the connection.
Secure
Connect
the top

[_

all connections

with clamps

the 3/16" ID relief tube from the small
port of the transition

as shown

port on the Trap to

in the picture.

In some

cases, additional
hose length will be needed.
Use the clear plastic
3/16" OD flexible tubing connector
and a suitable length of extra
3/16" ID hose to make this connection.
Install

the vent pipe grommet

into the casing

Cut an appropriate
length of 2" PVC pipe long,
cabinet and connect the vent drain to either:
•

A 2" PVC coupling
models)

Install

fastened

Tee Trap into bottom

enough

to exit the

onto the Drain Tee (*9MPT

section

or V

of Tee.

Connect the Tee trap and the main drain line exiting
shown in Figure
18.

the casing

as

Note:
It is recommended
that all PVC piping and fitting connections be fit up and inspected
before final cementing.
Both the external Trap and the external
Tee Trap must be primed
before
operation.
clamped.
installed

Verify all condensate
drain connections
are securely
A coupling
and clamps
(in loose part bag) may be
as shown

for future

servicing

of the vent system.

440 01 2020 0S

Downflow

Right Side Vent and Trap

Yellowor black Plastic

TrapConnection

Cap

Vent Drain
& Clamps
Preassemble

_Rotate

&

insert inlo furnace

SIDE VIEW
3116" ID
Rubber Tube

downward

Clamps

Splice Connector
Barbed

Dual

Pressure

1/2" ID
Drain Hose &

(Optional)

Switch

NOTE'r. Built-in channel will
he angled 5° to 10° also.

On Some
Models ONLY

Single Pressure

Switch

2" PVCCoupling

Detail
Either: The PVC
supplied2" PVC Tee

Drain TubeBlack, s/8"
ID Corrugated

DrainC
PVC314"
Move Caps
to top of
trap

©

Downflow
Remove

Right

the Drain

Disconnect

Side

Vent and

Trap

the hoses

drain tube to make connection
from the vent drain to the trap. Secure all connections
with clamps.

from the Trap assembly,

hole from the burner compartment
secure with screws.

and remove

Trap

the blower compartment.
Using
in the loose parts bag, cover the
to the blower

compartment

and

the corrugated

Drain

Tube from the transition

box to the

Trap as shown. If an extension is required, use the black PVC tube
connector and the black 5/8" ID Drain Tube in the loose parts bag.
Cut tube to length.

Secure

all connections

with clamps.

Connect the drain hose from the Vent Drain to the Trap. If an extension is required, use the black 1/2" OD barbed coupling, connect a black

440 01 2020 05

1/2" ID elbow

Install

tube and a suitable

section

of a 1/2" ID

the vent pipe grommet

into the casing

Cut an appropriate
length of 2" PVC pipe long,
cabinet and connect the vent drain to either:
•

Move the caps to the top of the Trap and mount the Trap externally
to the right side of the unit using the 2 screws provided.
Connect

DrainTube, (&Clamps)
Black,5_"lD Cutto fit
(loosepa_s bag)
25-24-46

(See Figure 13)

Tee if installed.

and Trap mounting bracket from
cover plate and gasket provided

White PVC
(loose partsbag)

Install

A 2" PVC coupling
models)

fastened

Tee Trap into bottom

Connect

section

enough

onto the Drain Tee (*9MPT

in Figure

Note:

It is recommended

or V

of Tee.

the Tee trap and the main drain line exiting

shown

to exit the

the casing

as

18.
that all PVC piping

and fitting

connec-

tions be fit up and inspected
before final cementing.
Both the external Trap and the external
Tee Trap must be primed
before
operation.
Verify all condensate
drain connections
are securely
clamped.
installed

A coupling
and clamps
(in loose part bag) may
as shown for future servicing
of the vent system.

[_

be

Horizontal
Vent Drain
& Clamps

Left Thru Top
Single

Yellowor blackPlastic

Pressure

Switch

Detail
Trap Connection
_

"Clamp ears"

Pointed OUT

Preassemble &

Alternate

insert into furnace

Orienation

3/16"ID
Dual Pressure

Switch

ReliefTube

ReliefTube Extension

l/z" ID Drain
Hose &
Field
Supplied Tee

(Optional)

Clamps
TubeBlack, /8 ID Corrugated
Cut at straight sec_tion

Tee Trap White PVC
(loose parts bag)

Cap andClamp
Open End

_Cut

Here

Leaveroom for clamp
25-24-47

Horizontal
Disconnect

Left-Thru
the hoses

Top

(See Figure14)

from the Trap assembly,

and remove

Trap

and Trap mounting bracket from the blower compartment.
Using
cover plate and gasket provided in the loose parts bag, cover the
hole from the burner compartment
secure with screws.
Mount

the Trap externally

2 screws

provided

Cut the corrugated
nect the corrugated
connections

the black

[_

the black

Secure

extension

and

side of the unit using the

1/2" ID Drain

Tube

from the Drain Tee.

over the open drain

1/2" ID Drain

connections

Tube

from the Vent Drain

to the

port on the Trap. If an

use the 3/16" OU flexible

tubing

Secure

all connections

parts bag.

Cut an appropriate
length of 2" PVC pipe, long enough
cabinet and connect the vent drain to either:
•

A 2" PVC coupling
models)

Install

fastened

Tee Trap into bottom

Cut tube

with clamps.
to exit the

onto the Drain Tee (*9MPT

section

or V

of Tee.

Connect the Tee trap and the main drain line exiting
shown in Figure
18.

the casing

as

Install

port of the Drain Tee.

with clamps.

the 3/16" ID relief tube to the middle
is required,

to length.

shown.

with clamps.

cap and clamp

Connect

compartment

tube as shown in the illustration
above. Conhose from the transition
to the Trap. Secure

a yellow

Trap.

to the bottom

in the location

Remove

Connect

to the blower

and the black 3/16" ID relief tube in the loose

connector

Note:
It is recommended
that all PVC piping and fitting connections be fit up and inspected
before final cementing.
Both the external Trap and the external
Tee Trap must be primed
before
operation.
clamped.
installed

Verify all condensate
drain connections
are securely
A coupling
and clamps
(in loose part bag) may be
as shown

for future

servicing

of the vent system.

440 01 2020 0S

Horizontal

Left-Side

Vent
Single Pressure

Alternate

Switch

Detail

Orienation

t

Yellow or black
Plastic

Field
SuppliedTee
Level or Sloped

towards

Dual Pressure

Tee
VentDrain
& Clamps

Switch

3/1S" ID Ru/bber Tube

1/2" ID Drain Elbow
.Drain Hose & Splice
Connector
(Cut-to- fit)
Tee Trap White PVC
(loose parts bag)

,5/8" ID
Corrugated

ReliefTube
//
u

DrainTubeBlack, /8 IDCorrugated
Cut at straight section
I

Leave
I_Gom fo'_

Splice Connector
ReliefTube Extension

WARNING
Move Caps to
top of trap

Cut Here

25-24-48

Horizontal
Remove

the

models

only)

LeftDrain

Tee from

Vent

(See Figure15)

the Vent

Drain

if installed

(*9MPD

180 ° for a side vent after loosening

screws.
torque.

Reinstall and retighten

the 4 induc-

the inducer

screws

Disconnect
the hoses from the Trap assembly,
and remove Trap
and Trap mounting bracket from the blower compartment.
Using
cover plate and gasket provided in the loose parts bag, cover the
hole from the burner compartment
secure with screws.
Mount

the Trap externally

2 screws

provided

to the blower

and

the black

1/2" ID Drain

side of the unit using the

shown.

Cut tube to length.

Connect
extension

Secure

Tube

from the Vent Drain

connections

the 3/16" ID relief tube to the middle
is required,

440 01 2020 05

pipe long enough
either:
•

Install

use the 3116"0D

wards

to the

with clamps.
port on the Trap. If an

flexible

tubing

connector

length

parts bag.

of 2" PVC pipe, fittings

to exit the cabinet

A 2" PVC coupling
models)

fastened

Tee Trap into bottom

Cut tube

section

and connect

and extension
the vent drain to

onto the Drain Tee (*9MPT

or V

of Tee.

The pipe to the Tee Trap must be level or sloping

to-

the Tee Trap

Connect

Trap. If an extension
is required, use the black 1/2" OD flexible tubing connector
and the black 1/2" ID Drain Tube in the loose parts
bag.

Cut an appropriate

Important:

to the bottom

in the location

compartment

Cut the corrugated
tube as shown in the illustration
above. Connect the corrugated
hose from the transition
to the Trap. Secure
connections
with clamps.
Connect

and the black 3/16" ID relief tube in the loose
to length.

Rotate the inducer
er attachment
to 20" pounds

Side

the Tee trap and the main drain line exiting

shown

in Figure

Note:

It is recommended

the casing

as

18.
that all PVC piping

and fitting

tions be fit up and inspected
before final cementing.
Both
ternal Trap and the external
Tee Trap must be primed

connecthe exbefore

operation.
Verify all condensate
drain connections
are securely
clamped.
A coupling
and clamps
(in loose part bag) may be
installed as shown for future servicing
of the vent system.
A coupling
and clamps (in loose part bag) may be installed
shown for future servicing
of the vent system.

[_

as

Horizontal
TrapConnection

Right thru Top
Single Pressure

Switch

Detail

"Clampears"

Alternate
Yellowor black

"I_

Orienation
/_

,,_

Plastic Cap

Preassemble&
insertintofurnace

Coupling&Clamps

_

(Optional)\

VentDrain

WARNING
_
Add Cap and _
Clamp
_
3/16"ID RubberTube\\

Relief

&Clamps
Field

\\

TuSbPell_ C::_:_

_

',

_

_lWo_oi
!e:_pP

___

_O_!ET

__Du_

!!

[')rain Tuba Rlack S/ " 113
...............
8 -

/

Corrugated Cut at straight sectio_
Leave roomfo_

Horizontal
Disconnect

Right

the hoses

provided

Cut the corrugated
nect the corrugated
connections

and remove

Trap

to the bottom

in the location

side of the unit using the

shown.

with clamps.

coupling and the black 1/2" ID Drain Tube in the loose
Cut tube to length.
Secure connections
with clamps.
the 3/16" ID relief tube to the middle

an extension

[_

is required,

nector

_o0_S;me M°dels

I

1/2" ID Drain Hose & barbed
coupling (Cut to fit)

/

-

25-24-49

parts

bag.

port on the Trap. If

use the clear 3/16" OD flexible

tubing con-

and the black 3/16" ID relief tube in the loose

parts bag.

Cut

tube to length.
Cut an appropriate

length

of 2" PVC pipe, fittings

pipe long enough to exit the cabinet and connect
a standard
field supplied
2" PVC tee
Install

tube as shown in the illustration
above. Conhose from the transition
to the Trap. Secure

Connect the black 1/2" ID Drain Tube from the Vent Drain to the
Trap. If an extension
is required, use the black 1/2" OD barbed

Connect

_

Thru Top (SeeFigure 16)
from the Trap assembly,

the Trap externally

2 screws

Csbag)

I

and Trap mounting
bracket from the blower compartment.
Using
cover plate and gasket provided in the loose parts bag, cover the
hole from the burner compartment
to the blower compartment
and
secure with screws.
Mount

_?uppliedTee

Tee Trap into bottom

section

and extension
the vent drain to

of Tee.

Connect the Tee trap and the main drain line exiting
shown in Figure
18.

the casing

as

Note:
It is recommended
that all PVC piping and fitting connections be fit up and inspected
before final cementing.
Both the external Trap and the external
Tee Trap must be primed
before
operation.
Verify all condensate
drain connections
are securely
clamped.
installed

A coupling
and clamps
(in loose part bag) may
as shown for future servicing
of the vent system.

be

440 01 2020 0S

Horizontal

Single

Pressure

Right-Side

Switch

Vent

Detail

Yellow or black

Coupling & Clamps
ptional)

VentDrain
& Clamps

Field
X

/

SuppliedTee

),

Level or Sloped
towards
Tee

)

I j

_STee
Trap
_
"White PVC
(loose parts bag)

DDr,'n

3/16"ID RubberTube_.._
ReliefTube

On Some Models

SpliceConnector

Relief Tube Extensio_
Alternate

Orienation

)upling
Dual

Pressure

Switch/

Drain Tube Black, 518" ID /
Corrugated

Cut at

<

/J

stra_

i

Leave room for clamp_Cut

Horizontal
Disconnect
Disconnect

Right

Side

25-24-50

Vent (See Figure 17)

Drain Tee if installed
the hoses

(Cut-to- fit)

Here

(*9MPD

models

from the Trap assembly,

only)

and remove

and the black 3/16" ID relief tube in the loose
Trap

and Trap mounting
bracket from the blower compartment.
Using
cover plate and gasket provided in the loose parts bag, cover the
hole from the burner compartment
to the blower compartment
and
secure with screws.

parts bag. Cut tube

to length.
Cut an appropriate
pipe long enough
either:
•

length

of 2" PVC pipe, fittings

to exit the cabinet

A 2" PVC coupling
models)

fastened

and connect

and extension
the vent drain to

onto the Drain Tee (*9MPT

or V

Mount the Trap externally
to the bottom side of the unit using the
2 screws provided
in the location shown.

Install

Cut the corrugated

Important:
The pipe to the Tee Trap must be level or sloping
wards the Tee Trap

to-

Connect the Tee trap and the main drain line exiting
shown in Figure
18.

as

tube as shown

nect the corrugated
hose
connections
with clamps.

in the illustration

from the transition

above.

Con-

to the Trap. Secure

Connect the black 1/2" ID Drain Tube from the Vent Drain to the
Trap. If an extension
is required, use the 1/2" OD barbed coupling
and the black 1/2" ID Drain Tube in the loose parts bag. Cut tube
to length.

Secure

Connect

connections

with clamps.

the 3/16" ID relief tube to the middle port on the Trap. If
3
,
an extension
is required, use the clear
/16' OU splice connector

440 01 2020 05

Note:

Tee Trap into bottom

It is recommended

section

of Tee.

that all PVC piping

the casing

and fitting

connec-

tions be fit up and inspected
before final cementing.
Both
ternal Trap and the external
Tee Trap must be primed
operation.
clamped.
installed

the exbefore

Verify all condensate
drain connections
are securely
A coupling
and clamps
(in loose part bag) may be
as shown

for future

servicing

of the vent system.

[_

Connecting

Tee Trap to Condensate

Trap and Main Drain Line

Open Tee

Z

Tee Trap_

Condensate
Tra p_

Evaporator
Coil
Drain Line (Optional)

Main Drain Line

25-24-41N
The Tee Trap must be connected
to the main condensate
drain
line as conceptually
shown above. Different
installations
may
require slightly different orientations.
The following
steps apply
to all installations.

Connecting

Vent and Combustion

Air Piping

I

1.

The Tee Trap should be installed as close to the side or top
of the furnace as practical. Minimize the distance between
the inducer and the Tee Trap as much as possible.

CARBON MONOXIDE POISONING HAZARD

An open tee is to be used at the Tee Trap discharge.
end of the tee should be open to the atmosphere
nate potential
air lock problems.

Cement

Failure
death,

to

properly

seal

vent

piping

injury and/or property

personal

could

I
I

in I

result

damage.

I
I

2.

The top
to elimi-

3.

The drain line from
furnace condensate

the Tee Trap is to be connected
to the
trap drain line as shown above.

4.

Condensate drain lines from a cooling coil may be connected downstream of the connection point of the Tee Trap
and Furnace Condensate Trap.

Important:
Prime both traps with water before operation.
Failure to prime the traps may result in discharge
of flue gases
from the condensate
drain line and open tee for a period of
time, and may result in temporary
lockout of the furnace upon
start up. Main drain line construction
is left to the discretion
of
the installer. It may be made of either ridged
pipe or flexible
1
tube. Tube ID should NOT be less than /2".

[_

to prevent

or mechanically
leakage

seal

of flue

all joints,

fittings,

gases.

I

Refer to Figure 9 through
Figure 17 that corresponds
installation
position of the furnace for the application.
Preassemble
the vent and combustion
to the vent termination.
Do not cement
preassembly
process is complete.

coupling

to the

air piping from the furnace
the pipe joints until the pipe

Combustion Air Pipe Connection
Direct Vent)
Install the air intake
four(4) screws.

etc. I

and gasket

(Dual Certified

to the furnace

or

with the

Note: The air intake cou piing and gasket ca n be installed to the top
panel to the alternate
air intake locations on either the left or right
side panels of the furnace.

440 O12020 05

Fordownflow
installation,
the air
be installed

intake coupling and gasket must
air intake location on either the left or

to the alternate

right side panels. Remove the 3" hole plug from the side panel and
relocate to the air intake hole in the top panel. Use four screws to
seal the four(4) mounting
holes in the top panel next to the hole
plug. Drill four(4) 7/64" diameter
holes in the casing using the air
intake coupling as the template.

The air intake coupling is sized for 2" PVC pipe.
Install the combustion
air pipe to the air intake coupling
sealant to provide for future serviceability.

Joining Pipe and Fittings

FIRE HAZARD
Failure to do so could result
and/or property damage.
Observe all cautions
material containers

using

in personal

and warnings

injury

printed

on

RTV

Provide adequate
ventilation
near heat source
or open
while using solvent cements

Vent Pipe Connection

and do NOT assemble
flame.
Do NOT smoke
and avoid contact with

skin or e_es.
Install the vent pipe grommet
to the furnace
panel. Locate the
grommet in the furnace panel at a location directly away from the
vent fitting on the combustion
blower. The grommet snaps into the
3" hole plug from the furnace panel. NOTE: Depending
on the
installation
position, the vent pipe grommet will be installed to the
top panel or to the alternate location on the side panels. If needed,
remove the 3" hole plug from the furnace panel and relocate to the
open

hole in the furnace

panel.

(See

Figure

9 or Figure

•

PipeandFittings-ASTMD1785,
D2241,D2466, D2661,
D2665, F-891, F-628
PVC Primer and Solvent Cement - ASTM D2564

18)

Install the vent pipe to the rubber coupling,
the vent fitting or the
PVC vent extension
pipe. Securely attach using the clamp or PVC
cement

This furnace is approved for venting with Schedule 40 PVC
CPVC, ABS, Cellular Core pipe fittings and SDR-26 PVC.
NOTE: All PVC, CPVC, ABS, and Cellular Core pipe fittings, solvent cement, primers and procedures MUST conform to American
National Standard Institute and American Society for Testing and
Materials (ANSI/ASTM) standards.

as required.

Note: The vent fitting
MUST be installed
with the air flow
marking
arrow pointed
toward the vent pipe. (See Figure 19)
Some installations
require the vent fitting to be installed
with
a 5 ° to 10 ° downward
slope. (See Figure 9 thru Figure 18)

•

•
Procedure for Cementing Joints - Ref ASTM D2855
NOTE: In order to create a seal that allows future removal of pipe,
RTV sealant MUST be used on the inlet pipe where it joins to the
furnace. PVC, CPVC, ABS, and Cellular Core pipe and cement
may be used on all other joints.

CARBON MONOXIDE POISONING HAZARD

Proper Sealing Procedure
Combustion
Blower
RubberCoupling
& Clamps_____

J
_

_
__
:Free
• r

_._

for

VentPipe
_(Top
PanelExit)
NOTE"
"='" The 90 ° elbow is approved
for use inside the furnace ONLY.

Failure to follow
this warning
could result
personal property damage, injury or death.

Do NOT use solvent cement that has become
curdled,
lumpy or thickened
and do NOT thin.
Observe precautions
printed on containers.
For
applications below 32 ° F., use only low temperature
type solvent cement.
Poor joints
may lead to
disconnected
or leaking vent pipe joints allowing
carbon monoxide to enter the living space.
1.

90° Elbow
& Clamps
Combustion

Pipe (Side Panel
Exit)
SIDE
VIEW

in

Cut pipe end square,
remove
ragged edges and burrs.
Chamfer end of pipe, then clean fitting, socket and pipe joint
of all dirt, grease, or moisture.

NOTE: Stir the solvent cement frequently
while using. Use a natural bristle brush or the dauber supplied with the cement. The proper brush size is one inch.
2.

After checking
pipe and socket for proper fit, wipe socket
and pipe with cleaner-primer.
Apply a liberal coat of primer
to inside surface of socket and outside of pipe. Do NOT allow primer to dry before applying cement.

3.

Apply a thin coat of cement

evenly

in the socket.

Quickly

ap-

ply a heavy coat of cement to the pipe end and insert pipe
into fittings with a slight twisting movement
until it bottoms
out.

Tee

NOTE:
pipe.

MUST

be fluid while

inserting

pipe. If NOT, recoat

4.

Hold the pipe in the fitting for 30 seconds to prevent the tapered socket from pushing the pipe out of the fitting.

5.

Wipe all excess cement from the joint with a rag. Allow 15
minutes before handling.
Cure time varies according
to fit,
temperature
and humidity.

25-24-14a
NOTE: Built-in channel will be angled 5° to 10° also.

440 01 2020 05

Cement

[_

Connecting Vent Pipes and Termination
NOTE:

Combustion

air intake

and

vent

MUST

same atmospheric
pressure zone. If installation
(sustained
temperatures
below 0 ° F), increase
tance

between

vent pipe and air intake

from

terminate

in the

is in a cold climate
the minimum dis-

2.

Secure vent pipe to wall with galvanized
strap or other
resistant
material to restrain pipe from moving•

3.

Insulate pipe with Armaflex or equivalent
closed cell foam insulation or Fiberglass
in and sealed against moisture•

moisture
insulation

rust

resistant
if boxed

8" to 18".
Sidewall
Termination
with Exterior
Risers to Get Above Snow Level or Grade
Level

CARBON MONOXIDE POISONING HAZARD.
Failure to properly vent this furnace could result
in death, personal injury and/or property damage.

MIN.

Maintain a minimum of 36" between combustion
air inlet and clothes dryer vent. Terminate the
combustion
air intake as far as possible from any
air conditioner,
heat pump, swimming
pool,
swimming pool pumping, chlorinator or filtration
unit.
1,

Y

20'

_

/

/

*18" Minimum for cold climates

_'_"

S
8"

Install all couplings, nipples and elbows using proper procedures for Joining Pipe and Fittings and maintain spacing
between vent and combustion air piping as indicated in
Figure 20 through Figure 27.

Sidewall
Termination
Above
Snow Level
8" *

12" or More
or Grade Level

__04F

Vertical Termination
1.

"18"Minimum
for coldclimates
(substained
below0° F)

MIN.

(substainedbelow0° F)

Figure
vertical

22 shows the proper installation
and clearances
for
vent termination•
The vertical
roof termination

should be sealed with a plumbing
roof boot or equivalent
flashing. The inlet of the intake pipe and end of the exhaust
vent must be terminated
no less than 12" above the roof or
snow accumulation
or other protrusion•
2.

GRADE LEVEL
OR
SNOW LEVEL

wall

If the vent system is installed in an existing chimney make
sure clearances
shown in Figure 22 are maintained•
Horizontal section
before the termination
elbow can be extended

MIN.

level, and 12" away from a vertical

on the inlet air to provide

25-00-05F

] Rooftop

necessary

clearance•

Termination

Horizontal Termination
1,

Cut two holes• 21/2" for 2" pipe, 3" for 21/2 " pipe, or 31/2" for
3" pipe. Do NOT make the holes oversized,
or it will be necessary to add a sheet metal or plywood plate on the outside
with the correct size hole in it.

2.

Check
plings

hole sizes by making sure it is smaller than the couor elbows that will be installed on the outside• The

couplings
or elbows
pushed back through
3.

4.

MUST prevent
the wall.

Extend vent pipe and combustion
3/4" to 1" and seal area between

the pipe

from

air pipe through
pipe and wall.

being

the wall

Install the couplings,
nipple and termination
elbows as
shown and maintain spacing between vent and combustion
air piping as indicated
in Figure 20 and Figure 21.

A metal shield

is recommended

18" x 18" min. or 18" min. diameter

a round the vent termination
at the exterior wall to protect the house
exterior
materials
from flue product
or condensation
(freezing)
damage•

Using Exterior Risers
1.

Install elbows

and pipe to form riser as shown

in Figure

21.

A = 12" Above

roof or snow accumulation

level

B = 8" Min., 20' Maximum, except in areas with extreme
cold temperatures
(sustained
below 0°F), the 18" Min,

Vent Termination Shielding
Under certain

wind conditions

some building

materials

may be af-

fected by flue products expelled in close proximity to unprotected
surfaces.
Sealing or shielding of the exposed surfaces with a corrosion resistant material (such as aluminum
sheeting) may be required to prevent staining or deterioration•
The protective
material
should be attached and sealed (if necessary)
to the building before
attaching
the vent terminal•

440 01 2020 05

Multi Vent Termination Clearances
When two (2) or more furnaces are vented
furnace must be individually
vented.

Risers
1 Termination
Sidewall
Inlet with
Vent Exterior
and Exhaust-Air

near each other, each
/

Two (2) vent terminations
may be installed as shown in Figure 23,
Figure 24, Figure 25, Figure 26, Figure 27 and Figure 28, but
the next vent termination
must be at least 36" away from first 2 terminations.
It is important that vent terminations
be made as shown
to avoid recirculation
of flue gases.

18" Min. for Cold Climates
(SustainedBelow0° F)
8" Min.

12" Min.
Grade or
Snow Level

1c°°ce°,ricve°,a°°c°m us,i°°-,irooo
"A"

Dimension "A" is touching or 2" maximum separation.

Rooftop
Inlet
Termination

12"Min. Grade or
Snow Level

Vent and

Exhaust-Air

18" Min.for Cold Climates
(Sustained Below 0° F)
8" Min.
20' Max.

Combustion
Air

Dimension "A" is touchin9 or 2" maximum

Concentric
Vent and
Sidewall
Termination

separation.

Combustion-Air
/

12" Min.

Exhaust

Level

25-22-43

iiiii_:
¸!!!!!!!!!:!!;il;::i!ii!ililililililililililiiiiil;!
¸_;;;;;;;;;;;;;;;;;;;;;;;;;;____!_!i!i!;iii__iiiiiiii___iiiiiiiiii__iiiiiiiiiiiiiiiiiiiiiiiiiiiiii__
forRecommended
Sustained
ColdAlternate
Weather

Installation

.............................................................................
(-0 ° F & below)

Exhaust

|
OVERHANG
EXHAUST 12"MIN.

25-22-02d
Dimension

_iii

"A" is touching

or 2" maximum

separation.

1 sidewalllnletventandExhaust-AirTermination
_J

12" _IlN.GroundLevel
Min.

\

25-23-73

FRONT VIEW

SIDE VIEW

_J

_>
/
12" Min. Grade or

_n

/

18" Min. for
Cold Climates

12"MIN.

(Sustained Below 0° F)

"A" is touchinq

or 2" maximum

separation.
Same Joist
Space

440 01 2020 05

5. Gas Supply

and Piping

CARBON MONOXIDE
EXPLOSION HAZARD.

POISONING,

FIRE

AND

Failure to follow these instructions
could result in
death, personal injury and/or property damage.
Models designated for Natural Gas are to be used
with Natural Gas ONLY, unless properly converted to
use with LP gas.
NOTE: The rating plate is stamped with the model number, gas
type and gas input rating. In addition,
models manufactured
for
sale in Canada have orifice size information
stamped on the rating
plate.

ELECTRICAL

Failure to do so could result in death, personal
injury and/or property damage.
Turn OFF power to furnace before changing
taps.
1.

Remove

2.

Reture

3.

Replace

the burner
fourth

compartment

(4th) DIP switch

the burner

speed

door.
to previous

compartment

setting.

door.

General Derating Rules
1.

Supply Pressure

SHOCK HAZARD.

These
furnaces
may be used at full input rating when
installed
at altitudes
up to 2,000'. When installed above
2,000', the input must be decreased
2% (natural) or 4% (LP)
for each 1000' above sea level. See Table 5 for required
high altitude input rate.

FIRE HAZARD.
Failure to properly set input pressure could result in
death, personal injury and/or property damage.
Nameplate

Do NOT set input rating above that shown on rating
plate.
1.
2.
3.

Elevation

High Altitude
Natural

Multiplier

Gas

LP Gas

0.95

0.90

3001'-4000'

0.93

0.86

Gas input to burners MUST NOT exceed the rated input
shown on rating plate.

4001'-5000'

0.91

0.82

5001'-6000'

0.89

0.78

Do NOT allow minimum gas supply pressure to vary downward. Doing so will decrease input to furnace. Refer to
Table 6 or Table 7 for normal gas supply and manifold pressures.

6001'-7000'

0.87

0.74

7001'-8000'

0.85

0.70

NPTporton

* Based

Failure to properly set input pressure could result in
death, personal injury and/or property damage.
Do NOT set input rating above that shown on rating
plate.
Gas supply pressure should be within minimum and maximum values listed on rating plate. Pressures are usually set by gas suppliers.

Manifold Gas Pressure Adjustment
Make adjustment

to manifold

pressure

(Hi& LoFire)
with burners

oper-

on mid-range

of elevation.

2.

For operation with natural gas at altitudes above 2,000', oririce change and/or manifold
pressure
adjustment
may be
required for the gas supplied.
First consult your local gas
supplier, then refer to Table 6 for required pressure change
and/or orifice change for high altitudes.

3.

For operation
with LP gas, gas orifices MUST be changed
and manifold pressure MUST be maintainedas
per Table 7.
Orifices
can be ordered
through
your distributor.
(See
Figure 29)

FIRE HAZARD

[_

Input Rate =
Input Rate x (Multiplier)

2001'-3000'

Supplypressurecanbecheckedusingthel/8"
the supply side of the gas valve.

Gas SupplyPressure

NOTE:
ating.

High Altitude
Sea Level

High Altitude Air Pressure Switch
Altitudes
over 4,000' may require a different air pressure
switch
than the one installed at the factory. Check parts list for pressure
switch and consult your distributor for part number and availability.
In Canada,
provincial
codes may govern installation
of switch.
Check with governing
authorities.
NOTE: The derating of these units at 2% (Natural)
has been tested and approved
by CSA.

and 4% (L.R)

440 01 2020 05

MANIFOLDPRESSUREAND ORIFICE SIZE FOR HIGHALTITUDEAPPLICATIONS
iiii;;i;i;i:

__
_______i
¸ ii _f;;;i_
_i

NATURAL GAS MANIFOLD PRESSURE (" w.c.)
MEAN ELEVATION
HEATING

0 to 2000

VALUEat

Orifice

ALTITUDE
BTU/CU.FT.

2001 to 3000

Mnfld Pressure

Orifice

No.

3001 to 4000

Mnfld Pressure

Orifice

No.

Hi

Mnfld Pressure

Orifice

No.

Lo

Hi

FEET ABOVE SEA LEVEL

4001 to 5000

5001 to 6000

Mnfld Pressure

Orifice

No.

Lo

Hi

6001 to 7000

Mnfld Pressure

Orifice

No.

Lo

Hi

Lo

7001 to 8000

Mnfld Pressure

Orifice

No.

Hi

Lo

Mnfld Pressure

No.

Hi

Lo

700

Hi

Lo

41

3.7

1.8

725

41

3.7

1.8

41

3.4

1.7

750

41

3.5

1.7

42

3,6

1,7

775
800

41

3.6

1.7

42

3.6

1.8

42

3.3

1.6

41

3.6

1.8

42

3,7

1,8

42

3.4

1.7

42

3,1

1,5

825

41

3.7

1.8

41

3.4

1.7

42

3.5

1.7

42

3.2

1.6

42

2,9

1.4

850

41

3.5

1.7

42

3.6

1,7

42

3,3

1,6

42

3.0

1.5

42

2.8

1,4

875

41

3.6

1.7

42

3.6

1.8

42

3.4

1.6

42

3.1

1.5

42

2.8

1.4

42

2.6

1.3

900
925

41

3.7

1.8

42
42

3,7
3,5

1.8
1.7

42
42

3.4
3.3

1.7
1.6

42
42

3.2
3.0

1,6
1,5

42
42

2.9
2,8

1,4
1,4

42
42

2.7
2.5

1.3
1.2

42
42

2.5
2,3

1,2
1,1

950

41

3.5

1.7

42

3.3

1.6

42

3.1

1.5

42

2.9

1.4

42

2,6

1.3

42

2.4

1.2

43

2.7

1.3

975

42

3,7

1,8

42

3,2

1.6

42

2.9

1.4

42

2.7

1,3

42

2,5

1,2

42

2.3

1.1

43

2.6

1.3

1000

42

3.5

1.7

42

3.0

1.5

42

2.8

1.4

42

2.6

1.3

42

2.4

1.2

43

2.7

1.3

43

2.4

1.2

1050

42

3,2

1,6

42

2.7

1.3

42

2.5

1.2

42

2.3

1,1

43

2.6

1.3

1100

42

2.9

1.4

42

2.5

1.2

42

2.3

1.1

43

2.6

1.3

NOTE: Natural gas data is based on 0.60 specific
Z223.1-2002/NFPA
54-2002 or National Standard

;

=

gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI
of Canada, Natural Gas and Propane Installation Code CSA B149.1-00.

LPG or PROPANE GAS MANIFOLD PRESSURE (" w.c.)
MEAN ELEVATION FEET ABOVE SEA LEVEL
HEATING VALUE
at ALTITUDE
BTU/CU.

FT.

2500

0 to 2000

2001 to 3000

Hi

Lo

Hi

4.9

10.0

10.0

Orifice Size

#54

3001 to 3999

Lo

Hi

4.9

9.0

#54

4001 to 5000

Lo

Hi

4.4

10.0

#54

5001 to 6000

Lo

Hi

4.9

9.4

#55

6001 to 7000

Lo

Hi

4.6

8.5

#55

The derating

of these

4% (LP Gas) has been

furnaces

tested

at 2% (Natural

and design-certified

Gas) and

4.

by CSA.

Tighten

orifices

Figure

so

it

Lo

Hi

4.2

10

Lo
4.9

#55

NOTE: Propane data is based on 1.53 specific gravity.
For fuels with different specific gravity consult the National
Z223.1-2002/NFPA
54-2002 or National Standard of Canada, Natural Gas and Propane Installation Code CSA B149.1-00.
NOTE:

7001 to 8000

is seated

_5:

Fuel Gas Code ANSI
and

gas

tight.

(See

29)

Changing Orifices for High Altitude
Changing
ELECTRICAL
HAZARD.

SHOCK, FIRE OR EXPLOSION

Failure to properly install orifices could result
death, personal injury and/or property damage.

Orifices
Measure
from face of orifice to the back side of the
manifold.

in
11/'8

3/

to 1 '16

rf

Turn OFF electric power (at disconnect)
and gas
supply (at manual valve in gas line) when installing
orifices. Installation of orifices requires a qualified
service technician.
NOTE:

Main burner

orifices

can be changed

1.

Disconnect

2.

Remove

3.

Remove the orifices from the manifold
with properly sized orifices.

440 01 2020 05

gas line from
manifold

for high altitudes.

gas valve.

from furnace.
and replace

them

5.

Reinstallmanifold.
rices.

EnsureburnersdoNOTbindonnewori-

I_

¸¸'¸¸¸¸¸
T pica,
Oas
Piping,or
up,,ow
........

,

dripleg,

union,

.........

Gas Pipe Grommet

(Sing,eP,pe
\

and furnace.

_
3" pipe

Use elbows

and 3" pipe

valve to piping
pipe entry.

when

nipple

using

nipple.

to connect

right

side

Manual shut-off
valve_
_
___"--_'''__
_

gas_

pressure

_al

switch.

on some

_

_z_
/_""_/_

_
LP Low

\
_ \
_
_

_

_

_
_=_

%

"-_

models.

_

"--._'qL._/\

--

( __

)

be installed

inside

the

cabinet

when

necessary

because

of

clearances.

/

i_

_]

__

NOTE: The gas meter can be used to measure
input to furnace.
Rating is based on a natural gas BTU content of 1,000 BTU's per
cubic meter. Check with gas supplier for actual BTU content.

1.

Turn OFF gas supply to all appliances and start furnace.
Use jumper wire on R to Wl and W2 for Hi fire.

2.

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

3.

Repeat
fire.

iiiiiiiiiiiiiiii!i
i:;iiiiiiiiiii;i
¸iiiiiii;ii(i(i(i(i(i
ii!!!; i! !!i!

wire

\

_On some

_

_

2s-24-22-2

Example
No. of
Seconds
Per Hour

Natural Gas
BTU Content
1,000

1 and 2 with jumper

_

_,

NOTE: Fourth (4th) dip switch must be in "ON" position.
(See Furnace Wiring Diagram). Return fourth (4th) dip
switch to previous setting after check.

Natural Gas Input Rating Check

steps

_-------"--_J/
._'_
_

\_

may

_

_(_

_]__/

* Union

/ _,_ __
_
_
_¢_

//

on R to W2 for low

Time Per
Cubic Foot
Seconds

3,600

in

48

BTU Per
Hour
75,000

1,000 x 3,600 + 48 = 75,000 BTUH
4.

Relight

NOTE:
two.

all appliances

and ensure

all pilots

are operating.

If meter uses a 2 cubic foot dial, divide results

(seconds)

by

i!!!iii

Typical Gas Piping for Downflow
Use

elbows

piping

when

and

3" pipe

using

P Low

Optional

nipple

left side

gas

pressure

to connect
pipe

switch.

valve

to

entr_

_

7

LP conversion.
Ma_;Ualshut" °_,

Drip

Leg

Manual

and

Union,

shut-off

valve

Union
MUST

should

be outside

be upstream

the cabinet.

of dripleg,

union,

/

and furnace.

/
Gas

*Union
because

[_1

may be installed
of clearances

t_

inside
....

the

cabinet

when

necessary

_

/

Pipe Grommet/

(Single

Pipe)
4

440 01 2020 0S

Gas Piping Requirements
1.

Properly size gas pipe to handle combined
appliance
load
or run gas pipe directly from gas meter or LP gas regulator.
Refer to NFGC and ANSI Z223.1 for proper gas pipe size.

2.

Install

3.

Measure
regulator.

correct

pipe size for run length

pipe length

NOTE: Refer to Figure
the furnace.
The rules
installations.

from

gas meter

and furnace
or LP second

4.

Use black iron or steel
proved by local code.

5.

Use ground joint unions and install a drip leg no less than 3"
long to trap dirt and moisture before it can enter gas valve.

6.

Use two pipe wrenches
when
vent gas valve from turning.

7.

Install a manual shut-off
valve
and tighten all joints securely.

rating.
stage

30 or Figure 31 for the general layout at
listed apply to natural and LP gas pipe

pipe and fittings

Additional LP Connection

NOTE: On the Dual Certified or Direct Vent models, install the gas
pipe grommet to the furnace side panel with the gas pipe entry. If
needed, remove the 2" hole plug and relocate to the open hole in
the furnace side panel.

making

or other

pipe ap-

connections

external

to pre-

to furnace

casing

Requirements

1.

Have a licensed LP gas dealer make all connections
at storage tank and check all connections
from tank to furnace.

2.

If copper tubing is used, it MUST comply with limitation
National Fuel Gas Code or CGA codes.

3.

Two-stage

set in

regulation of LP gas is recommended.

Final Check
FIRE OR EXPLOSION
Failure to properly
result in death,
damage.

1. The furnace and the gas 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. Close the
manual shut-off
valve before testing at such pressures.

HAZARD

install metal gas connector could
bodily
injury and/or property

2.

A flexible corrugated metal gas connector must be
properly installed, shall not extend through the side
of the furnace,and
shall not be used inside the
furnace.
Black iron pipe shall be installed at the furnace gas
control valve and extend a minimum of 2" outside
furnace casing.

6. Electrical

When installation
is complete,
test all pipe connections
for
leaks with the gas pressure
less than 1/2" PSIG to the gas
valve.

3,

Apply
leaks.

a commercial
soap solution to all joints
Correct any leaks indicated
by bubbles.

4.

Correct

5.

Check for leaks at gas valve and orifice connections
to the
burner manifold along with the pilot tube connections
to the
valve and pilot assembly while the furnace is operating.

even the smallest

to test for

leak at once.

Wiring
J- Box Relocation

ELECTRICALSHOCK

The j-box is installed
location on right side

HAZARD.

on left side of casing.
can be used.

An alternate

j-box

Failure to do so could result in death, personal
injury and/or property damage.

1.

Remove bag containing
two hole plugs and two self tapping
screws from loose parts bag in blower compartment.

Turn OFF electrical power at fuse box or service
panel before making any electrical connections
and ensure a proper ground connection
is made
before connecting line voltage.

2.

Remove

3.

Move large

4.

Move j-box
to alternate
location
tapping screws from bag.

5.

Apply

two screws

holding

j-box

to casing.

hole plug from right to left j-box

two hole plugs

and attach

from bag at left j-box

location.
using

two self

location.

Thermostat

Power SupplyWiring
The furnace MUST be electrically
wired and grounded
in accordance with local codes, or in the absence of local codes with the

latest edition of The National Electric Code, ANSI N FPA 70 and/or
The Canadian Electric Code CSA C22.1.
Field wiring connections
must be made inside the furnace connection box. A suitable strain relief should be used at the point the
wires exit the furnace casing.
Copper

conductors

shall

be used.

Line voltage

wires

should

conform to temperature
limitation of 63 ° F (35 ° C) rise and be sized
for the unit maximum amps stated on the rating plate. Add the full
load amps for potential
field-installed
accessories
such as electronic air cleaners
and humidifiers
that would receive power from
the furnace control. The furnace control is rated for a maximum
of
0.8 amps combined
for EAC and Hum. Consult
for proper wire and circuit sizing.

440 01 2020 05

N EC or local codes

The 2-stage
furnace control will operate with either a single stage
or a two stage heating thermostat
and will provide 2-stage heating
operation.
For single stage thermostat
installations,
the R and W
wires from the thermostat
connect to the R and Wl connections
on
the furnace

control.

Note:

The fourth

(4th) DIP switch

must be in

the off position, failure to change DIP switch will result in Lo Fire
ONLY operation.
(See furnace wiring digram) See "Furnace
Wiring Diagrarr/' for switch settings. Failure to set DIP switch will result
in Lo fire operation ONLY with single stage thermostat.
During operation, the furnace will operate on low fire for 12 minuteslfthe
heat
request exists for more than 12 minutes. If the heat request exists
for more that 12 minutes, the furnace will automatically
shift to the
high fire mode for the remaining duration of the heating cycle. For
two stage thermostat
installations,
the R, W1 and W2 wires from
the thermostat
connect to the R, Wl and W2 connections
on the
furnace control. During operation,
the furnace will shift from low
fire to high fire as requested
by the thermostat.
The thermostat
heat anticipators
should be adjusted to a. 10 setting for both types
of thermostats.

[_1

Low voltage connections
board to fan control.

to furnace

must

be made

Fan Control

on terminal

The fan control is preset at the factory with a fixed blower ON delay
of 30 seconds in the heating mode. The blower OFF timing is preset at 140 seconds. If desired, the fan OFF delay can be reset to
obtain the longest delay times while still maintaining
comfort levels. See "Furnace
Wiring Diagram".

Optional Equipment
All wiring from furnace to optional equipment
MUST conform to local codes or, in the absence of local codes with the latest edition of
The National Electric Code, ANSI NFPA 70 and/or The Canadian
Electric
Code CSA C22.1.
Install
wiring
in accordance
with
manufacturer's
instructions.
The wiring MUST have a minimum
temperature
rating of 105 ° C. codes or, in the absence
of local
codes, the applicable
national codes. Install wiring in accordance
with manufacturer's
instructions.

Humidifier/Electronic
The furnace
connection.

is wired

Dehumidification
distat connection.
1/4" male

Air Cleaner
for humidifier

and/or

electronic

air cleaner

i

quick

- Variable Speed ONLY (*9MPV)

Connect
connect

dehumidistat
Y2 terminal

to the Y terminal
on the

fan

control

and the
(See

Figure 33 and "Furnace
Wiring Diagram")
A 20% reduction
of
cooling airflow will occur when the Y2 dehumidistat
terminal is enThe fan control is wired for 24 VAC normally-open
(N/O) dehumiergized by being connected
to Y during a call for cooling from the
thermostat.

Control Center Fuse
REDUCED FURNACELIFE
Failure to follow
reduced
furnace

caution
life.

HAZARD
instructions

Do NOT exceed
115V/0.8
load for both
the EAC
terminal
combined.

may result

in

amp. maximum
current
terminal
and the HUM

NOTE:

Junction

Box can be mounted

iiiiiiiiiii_it
i¸i!iii;ii;!iiiiiil
!ii!i
;i!l;
¸i;;i
i!ii;ii;ii;ii;!
!!iiii!i;il;;ili;;
¸i!!!!!!!!!
i;

Fan Timer

NOTE: The humidifier
will be powered when the furnace is fired
and the circulating
air blower comes on. The electronic
air cleaner
will be powered anytime the air circulating
blower is energized.
However, the electronic
air cleaner is NOT energized
during continuous fan operation
controlled
by the electronic
fan control.

Electrical

The 24V circuit contains a 5-amp, automotive-type
fuse located
on fan timer board. (See Figure 33) Any electrical
shorts of 24V
wiring during installation,
service, or maintenance
may cause fuse
to blow. If fuse replacement
is required, use only a fuse of identical
size (5 amp.)

Connections
to either

the left or right

side.

Connections

I"
/

Dip Switch
See "Wiring DiagraM'
for switch settings

115V.60 Hz.

25-22-44a
Connection

Box

Single Stage
Thermostat

LowVoltage _]
TerminalBoard_

I

25-23-42a
TwoStage i
Thermostat[

NOTE: 115 VAC/6OHz/single-phase
Operating voltage range*: 127 max, 104 min.
* Permissible

[_

limits

of voltage

at which

unit will operate

satisfactorily

440 01 2020 05

7. Ductwork

and Filter
1.

CARBON MONOXIDE POISONING HAZARD.
Failure to properly seal duct could result in death,
personal injury and/or property damage.
Do NOT draw return air from inside a closet or
utility room. Return air duct MUST be sealed to
furnace casing.

For side connections
using a 16" x 25" filter, cut out the embossed area shown in Figure 34. This will provide a 141/2 ', x
221/2 ', approximate
opening.

Side Return
A = 14112" Height
B = 22112" Width

of Cutout
of Cutout

Air Cutout

for 16"x 25" Filter
for 16" x 25" Filter

Installation
Embossed
Area
on Side of Furnace

NOTE: Design and install air distribution
system to comply with Air
Conditioning
Contractors
of America manuals and/or NFPA pamphlets 90A and 90B or other approved
methods that conform to local codes and good trade practices.
1.

When furnace supply ducts carry air outside furnace area,
seal return air duct to furnace casing and terminate duct outside furnace space.

2.

Install air conditioning
side of furnace.

3,

For furnaces
installed without
a cooling coil it is recommended that the outlet duct be provided with a removable

cooling

coil

(evaporator)

on outlet

access panel. This panel should be accessible
when the
furnace is installed so the exterior of the heat exchanger can
be viewed for inspections.
The access
panel MUST be
sealed
4,

to prevent

leaks.

If separate
evaporator
and blower units are used, install
good sealing dampers
for air flow control. Chilled air going
through the furnace could cause condensation
and shorten
the furnace life.

NOTE: Dampers (field supplied) can be either automatic
or manual. Manually operated dampers MUST be equipped
with a means
to prevent furnace or air conditioning
operation unless da roper is in
the full heat or cool position.

CARBON MONOXIDE POISONING HAZARD.
Failure to follow this warning could result in death,
personal injury and/or property damage.
Cool air passing over heat exchanger can cause
condensate
to form resulting in heat exchanger
failure.

NOTE:
returns

Furnaces with 5 TONS cooling
or one side return with bottom

return air can enter through either
On horizontal
or downflow
installa-

rating require
return.

two(2)

side

2.

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

3.

Installation
branches,

4.

Non-combustible,

flexible

mended

and supply

5.

of locking-type
or in individual
for return

dampers are recommended
in all
ducts to balance system's air flow.
duct

connectors

connections

are

recom-

to furnace.

If air return grille is located close to the fan inlet, install at
least one, 90 ° air turn between fan and inlet grille to reduce
noise.

NOTE: To further reduce noise, install acoustical
air turning
and/or line the inside of duct with acoustical
material.

vanes

Sizing
Existing
amount
tioning.

or new ductwork
MUST be sized to handle the correct
of airflow for either heating only or heating and air condi-

Insulation
1.

Insulate ductwork installed in attics or other areas exposed
to outside temperatures
with a minimum of 2" insulation and
vapor barrier.

2.

Insulate

ductwork

in indoor unconditioned

mum of 1" insulation

with indoor

areas with a mini-

type vapor

barrier.

Filters
A Filter must

Connections
NOTE: On upflow installations,
side, both sides, or the bottom.

Bottom
Furnace

be used:

Filters are not supplied
from dealer.
Use either

tions the return air must enter through the knockout opening in the
lower panel of the furnace. Return air can not enter through rear of

with these furnaces,

but can be purchased

filter type:

•

Washable,
high velocity filters
air flow rating of 600 FPM.

are based on a maximum

•

Disposable,
Iowvelocity
filters are based on a maximum
air flow of 300 FPM when used with filter grille.

the furnace. When the furnace is located in an area near or adjacent to the living area, the system should be carefully designed
with returns to minimize
noise transmission
through the return
grille. Any blower moving a high volume of air will produce audible

NOTE:

noise which could be objectionable
close to living areas. It is advisable
der the floor or through the attic.

able, high velocity filter providing
they meet the minimum
size
areas. Washable,
high velocity filters can be replaced ONLY with
same type and size.

440 01 2020 05

to when the unit is located very
to route the return air ducts un-

Disposable,

low velocity

filters

may be replaced

with wash-

[_

Side Mounted

Filter

Standoff

Rack

Filter

Rack

Using Optional
Standoff Filter
Rack

25-20-90

Filter Installation using Filter Rack
When installing or removing a bottom mounted filter, slide the two
side filter clips to the back of the furnace BEFORE installing or removing. This will allow the filter to clear the front raised edge of the
furnace. Insert filter into side clips first and push filter back until it is
fully engaged
into back clip. When filter is in place, slide clips back
into place midway on filter as shown in Figure 36.

Bottom

Mounted

Filter

Rack

25-21-45a

CAUTION
If filters
are only suitable
homeowner
that filter size
conditioning
is added.

for heating
application,
advise
may need to be increased
if air

Addition Of Air Conditioning
When a refrigeration
coil is used in conjunction
with this unit, it
must be installed on the discharge
side of the unit to avoid condensation
on the heat exchanger.
The coil installation
instructions
must be consulted
for proper coil location and installation
procedures.
With a parallel
flow arrangement,
dampers
must be
installed to prevent chilled air from entering the furnace. If ma nually operated
dampers
are used, they must be equipped
with a
means to prevent operation
of either unit unless the damper is in
full heat or full cool position.

Slide filter clips

towards

25-24-18
back before removing

Refer to Figure 37 and for guidelines
to install filters. Furnaces
which require larger filter media and have limited clearances
on
one side of furnace, require a standoff filter rack, see Figure 37,
available

from your

distributor.

A 3" clearance
is required on the right side ofthe furnace in order to
run the condensate
drain line. Copper, iron or plastic tubing may be
used for the condensate
drain line.

Downflow Furnace Installation
Non- Combustible

Floor Installation

Fabricate a plenum to the dimensions
given in Figure
nace outlet. Plenum should be flanged, approximately
port.

3, for the fur3/4" for sup-

Note: The three(3) screws in the top panel of the furnace
the duct flange MUST be removed to provide serviceability
primary heat exchangers
in the downflow
installation
1.

next to
of the

Position plenum through the floor and set the furnace over
the opening in the floor. If necessary, grout around the base
to seal air leaks between the base and the floor.

Combustible

Floor Installation

FIRE HAZARD.
Failure to install unit on noncombustible
subbase
could result in death, personal
injury and/or
property damage.
Place furnace on noncombustible
subbase on
downflow applications,
unless installing on noncombustible
flooring.

[_1

440 01 2020 05

Subbase for Combustible Floor

The Subbase
for Combustible
Floors
downflow furnace is set on a combustible
nace is installed on a coil box.

NOTE: The three(3) screws in the top panel of the furnace
the duct flange MUST be removed to provide serviceability
primary heat exchangers
in the downflow
installation

next to
of the

for Combustible

2.

and 11/8 ', narrower

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

Opening

Opening In Base
For Plenum

In Floor

R

S

T

16

161/4

145/8

15

13112

15

131/2

16

161/4

181/4

15

17118

15

171/8

2113/16

16

161/4

21 1/8

15

193/4

15

193/4

239/16

16

161/4

235/8

15

221/2

15

221/2

NAHH001SB

1511/16

283/4

149/16

NAHH002SB

1 95/16

283/4

183/16

NAHH003SB

225/16

283/4

NAHH010SB

2411/16

283/4

8.

Typical Plenum
Dimensions

P

K *_

than

size of the opening in the floor. This is done to
between the floor and the plenum.

N

j_

Subbase

in the base is 11/4 ', shorter

the recommended
maintain clearance

8

tabs that center the

M

H _

Furnace

The opening

with locating

8.Theholein
listed in Table

Floors Dimensions

Subbase for Combustible
Floor Dimensions

Subbase for Combustible
Floors Part Number

CuttheopeningintheflooraccordingtoTable
the floor must be cut to the dimensions
since the base is equipped
base over the opening.

Note: When using the subbase
for combustible
floors, the discharge air duct flanges on the furnace MUST be broken down to
provide proper fit up to the subbase.
Use duct pliers to bend the
duct flanges flat onto the furnace casing. DO NOT bend the duct
flanges inward (toward the heat exchangers)
as air flow restrictions may occur.

Subbases

1.

MUST be used when a
floor, even when the fur-

Subbase

for Coil Cabinets

NAHH004SB

1511/16

209/16

149/16

161/4

161/4

145/8

15

131/2

15

131/2

NAHH005SB

1 95/16

209/16

183/16

161/4

161/4

181/4

15

171/8

15

171/8

NAHH006SB

23

209/16

2113/16

161/4

161/4

21 1/8

15

193/4

15

193/4

NAHH009SB

243/4

209/16

239/16

161/16

161/4

235/8

15

221/2

15

221/2

Outside Dimension
Base Spacer Side To Side
3,

Set the base over the opening in the floor, centering
it over
the opening.
Fasten the base to the floor with screws or
nails.

See Figure

38, Figure

39 and Figure

5.

Position
aligns

furnace
between

or coil cabinet
the locating

Coil Cabinet

A = 4 114" Minimum
clearance
from back
or other

on subbase

40.

Furnace Subbase

to wall

and furnace
tabs.

Subbase

of hole

obstruction,
Combustible
Floor Base

H
J

25-20-46

A
25-20-46b

4,

Drop the plenum through
the opening
in the base. The
flange of the plenum should rest on top of the subbase.

440 01 2020 05

A = 4 1/4" Minimum
obstruction.

clearance

from

back

of hole

to wall

or other

[_

so it

Setting

Condensate

the Subbase

Line Raised by Base

Furnac
Installation of
Combustible
Floor Base

Wood

Floor
25-20-52

Plenum
25-20-46a

This subbase for combustible
floors has been designed so that the
height of the subbase raises the downflow
coil off the floor to allow
easy installation

of the condensate

8. Checks

drain.

See Figure

41.

and Adjustments
3.

Turn gas ON and remove adjustment
screw cover on gas
valve. Turn counterclockwise
to decrease
pressure
and
clockwise
to increase.

4.

For altitudes up to 2000', set pressure to value shown in
Table 6, -+0.3" (atom) water column. For altitudes of 2000'

FIRE OR EXPLOSION HAZARD.
Failure to turn OFF gas at shut off before
connecting
manometer
could result in death,
personal injury and/or property damage.
Turn OFF gas
manometer.

at shut

off

before

to 8000',

see Section

5 for correct

pressure

setting.

Adjust Pilot Burner

connecting

The furnace has a pilot flame to light the main burner. The flame
should surround 3/8" to 1/2" of the flame sensor. See Figure 42. To
adjust, remove cap from pilot adjusting
screw on gas valve. Turn
screw counterclockwise
to increase
or clockwise
to decrease

Startup

flame as required.

Replace

NOTE: Refer to the start-up procedures
in the "User's Information
Manual'
or to the "Operating
Instructions
Label' on the furnace.

adjusting

screw

cap.

Pilot Burner
Proper

FIRE OR EXPLOSION HAZARD.

Flame

Adjustment

Failure to correct hazard could result in death,
personal injury, and/or property damage.

3/8"

_j

to 1/2'_

Flame Sensor
_

_

_ /

/

Hot Surface

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

f

Gas SupplyPressure

10-11-65

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

Manifold Gas Pressure Adjustment
NOTE:
ating.

Make adjustment

1.

Remove

2.

With

gas OFF,

gas valve.
range.

[_

the burner

to manifold

pressure

compartment

connect

Igniter

manometer

Use manometer

opening
water

for the following

43):

Stable and blue flames. Dust may cause orange tips or
wisps of yellow, but flames MUST NOT have solid, yellow
tips.

•

Flames
extending
changer.

•

Flames

on

column

(Figure

then inspect the

•
oper-

door.
to tapped

Allow the furnace to run approximately
10 minutes
main burner and pilot flames. See Figure 43.
Check

with burners

with a 0 to 15"

Main Burner Flame Check

directly

do NOT touch

from

burner

into

heat

ex-

sides of heat exchanger.

If any problems with main burner flames are noted, it may be necessary to adjust gas pressures,
or check for drafts.

44001202005

Main Burner
REDUCED FURNACE LIFE HAZARD
Failure to properly set the air temperature
result in reduced furnace life.

Face

rise may

Use ONLY the following blower motor speed taps for
setting air temperature rise.
Blower Motor
Speed Taps
10-10-78

1.

The blower speed MUST be set to give the correct air temperature
rise through the furnace as marked on the rating plate for both high
fire and low fire operation.
Temperature
rise is the difference
between supply and return air temperatures.
To check
1.

temperature

rise,use

the following

should

Take readings
plate.

4.

If the temperature
rise is not in the correct range, the blower
speed must be changed. A higher blower speed will lower
the temperature
rise. A lower blower speed will increase the
temperature
rise.

6.

with range

be in the on posi-

3.

5.

and compare

specified

on rating

Repeat steps 2 thru 4 with the furnace operating
on low fire
for 10 minutes by using a jumper wire on the R to Wl thermostat connections
on the fan board.
Remove
the jumper
plete. Return fourth

wire after the adjustments
(4th) to previous setting.

are com-

Changing Blower Speed (*9MPTModels)

SHOCK HAZARD.

Failure to do so could
personal injury.
Turn OFF power
speed taps.

result

to furnace

in death and/or
before

changing

NOTE: The speed taps that the manufacture
sets from the factory
for this product are based on a nominal 400 CFM per ton cooling
and the basic mid range on the temperature
rise for heating.
Since the manufacturer
cannot
establish
the static pressure
that will be applied
to the unit, it is the responsibility
of the installer dealer/contractor
to select the proper
speed taps for
the application
when the unit is installed.

440 01 2020 05

speeds,

refer to steps

below.

Refer to Furnace Wiring Diagram for location of the heating
and cooling speed taps located on the electronic
fan control
as well as location
of unused
blower motor speed leads.
Use the chart (Table 9) to determine
the blower motor
speed settings.

Wire Color

Motor Speed

Black

High

Orange*
Blue

Med-High
Medium

Red

Low

* Med-High speed may not be provided on all models.
Change the heat or cool blower motor speed by removing
the motor lead from the "Heat" or "coor'
terminal and replace it with the desired motor speed lead from the "Unused Motor
Lead" location.
Connect the wire previously
removed
from the "Heat" or "coor'
terminal to the vacated
"Unused
Motor Lead" terminal.
If the same speed must be used for both heating and cooling, remove
the undesired
motor speed lead from the
"Heat" or "Cool" terminal and connect that lead to the open
terminal at "Unused
between the "Heat"
motor speed lead.

Motor Lead" location. Attach a jumper
and "Cool" terminals
and the remaining

Note: For motors with (4) speed leads, it will be necessaryto
tape off the terminal of the motor speed lead removed from
the "Heat" or "Cool" terminal with electrical
tape since an
open terminal will not be available at the "Unused
Motor
Lead" location.

Continuous
ELECTRICAL

to change

None
All
All
050F12 and 125L20

Blower Speed Chart

Place thermometers
in supply and return air registers
as
close to furnace as possible, avoiding
direct radiant heat
from heat exchangers.

Note: The fourth (4th) DIP switch
tion. (See furnace wiring digram)

All
All
All except lOOJ
None

procedure:

Operate furnace on high fire for 10 minutes with all the registers and duct dampers open by using a jumper wire on R to
Wl and W2 thermostat
connections
on the fan board.

2,

Hi (BLK)
Med-Hi (O)
Med Lo (BL
Lo (R)
If it is necessary

Temperature Rise Check

Model Sizes
Heat High
Heat Low

Fan Operation

A terminal is provided on the electronic
fan control located in the
circulating blower compartment
for operation
of the continuous
fan
option. This connection
is intended
for the low speed motor tap,
and has a lower contact rating (8 amps) than the heat and cool
taps. When the low speed blower lead is connected
to this terminal, this will provide low speed blower operation whenever
the other two speeds

(Heat

or Cool)

are not energized.

Thoroughly
check the system after modification
to ensure the
proper operation
of the circulating air blower in all modes of operation.

Separate speed selections
Continuous Fan

for Heat, Cool, and

Connect low speed lead from circulating
motor to the "Cont." terminal at the electronic
fan control. The appropriate
motor leads
should already be connected
to the "Heat" and "coor'
terminals.

NOTE:
factory
cooling

Heating and Continuous Blower Speed the Same
If it is necessary
to operate the heating speed and continuous
blower speed using the same blower speed, connect a jumper between the "Heat" and "Cont." terminals
on the electronic
fan control.
Note: There should be only ONE motor
and "Cont." terminals.

lead going

The blower speeds
that the manufacturer
sets from the
for this product are based on a nominal 400 CFM per ton
and the mid range on the temperature
rise for heating.

Since the manufacturer
cannot
establish
the static pressure
that will be applied to the unit, it is the responsibility
of the installer dealer/contractor
to select the proper
speed taps for
the application
when the unit is installed.

to the "Heat"

If it is necessary
1.

Changing Blower Speed C9MPVModels)

to change

speeds,

refer to steps

The 115 VAC power

supply

OFF

adjustments

before

making

to the furnace

to the motor.

NOTE: Allow at least I minute before
furnace after making Blower Control

ELECTRICAL

Turn OFF power to furnace
taps.

injury andlor

before changing

restoring power to the
changes.

The heating, cooling and continuous
blower speeds can be
adjusted by changing the switch settings that are located on
the motor control (see Figure 44). Switches #1 and #2 adjust the continuous
blower speeds. Switches #3, #4 and #5
adjust the heating speeds. Switches #6, #7 and #8 adjust
the cooling speed. See the "Technical
Support Manual"for
the switch settings for the desired airflow rates for the installation.

SHOCK HAZARD.

Failure to do so could result in personal
property damage,

below.
must be turned

speed

Blower Motor Control

010

/!"""!°,,,,
1_

o00oo

8

"EXAMPLE
Cooling Airflows
6,7&8:
000
001
010
011

INPUT

SIGNALOR
DIP

CONNECTIONS

OFF SWITCHES

O

3.5
3.0
2.5
2.0

Switches

Ton
Ton
Ton
Ton

THERMOSTAT

*See "Technical
Support
Manual" for correct
airflow
rates,
25-23-I0

9. Furnace

Maintenance

FIRE,
EXPLOSION,
HAZARDS

OR CARBON

MONOXIDE

ELECTRICAL
HAZARD

SHOCK, FIRE OR EXPLOSION

Failure
to
have
the
furnace
inspected
and
maintained
could result in fire, explosion,
or carbon
monoxide
poisoning.

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

It is recommended
that the furnace
be inspected
and serviced
on an annual basis (before the heating
season) by a qualified
service technician.

Improper
operation,
damage.

servicing
serious

could result in dangerous
injury, death
or property

• Before servicing,
power to furnace.
• When servicing
disconnecting.

disconnect

controls, label all wires prior to
Reconnect wires correctly.

• Verify proper operation
See

[_[]1

"User's

Information

all electrical

Manual"

after servicing.
and the

"Service

Manual".

440 01 2020 05

10. Sequence of Operation
The following

is the normal

operating

& Diagnostics

sequence

for the 2-stage

control

system.

Cooling (Y) Request:
24 VAC signals
•

speed

Y & G signals
•

applied

Cool motor

to Y & G terminals

energized

removed

from

after 90 second

(Y) and dehumidification

24 VAC signals

applied to Y, Y2 & G terminals

•

Same operation

as the cooling

Circulating

(Y) request,

The cooling speed returns

control.

time.

Cool Fan Off Delay time.

of EFT (electronic

fan timer)

control.

except the cooling speed is reduced
to the normal

20% to compensate

for high humidity

conditions

during

setting after the Y2 signal is removed.

Fan (G) Request:

24 VAC signals
•

fan timer)

Fan On Delay

(Y2) requests:

•

cooling operation.

Cool

EFT.

Cool motor speed de-energized

Cooling

of EFT (electronic

after 5 second

applied

to G terminals

Low motor speed energized

of EFT control.

without delay.

G signal removed from EFT.
• Low motor speed de-energized without delay,
NOTE1)

Furnaces

with DC blower

motors

run a low circulating

NOTE2)

Furnaces

with PSC blower

motors

de-energize

for Heating
NOTE3)

that occurs
Heating

during

or Cooling

speed after the selected
following

in response

to G request.

the Low Heat fan speed during the heat exchanger

warm-up

period on a call

a G request.
requests

received

during

Fan On Delay time expires.

loss of the Heating

fan speed

or Cooling

a Fan request

The fan returns

cause

the fan speed

to circulating

to change

to the appropriate

speed after the selected

heat or cool

Fan Off Delay time expires

request.

Heating (Wl) Request (single stage thermostat

operation, 4th DIP switch must be in off position) (see furnace

wiring diagram):
24 VAC signals

applied

W1 terminal

Inducer

•

The high fire solenoid

energizes.

•

Following

prepurge

•

After

•

Timed

from the opening

inducer

to low speed,

•

motor

to

•

a 3 second

the pilot lights,

Timed
expires

from

of EFT control.

turns on at high speed.

initial

delay,

the pilot valve

the main burners

energize

of the main gas valve,
de-energizing

application

the inducer

removed

EFT.

switches

the control

request,

and the ignitor

(burners

the high fire solenoid

of the Heating

(12 minutes),

opens

and light

will delay

the selected

and the fan switches

if the Wl

to high speed,

begins

to warm

up.

now at high fire rate).

request

Heat

is still present

the high fire solenoid

Fan On Delay

to Low Heat

time before

after the selected

energizes

switching

the

speed.
Low Fire Delay

and the fan switches

time

to High Heat

speed.
W1 signal

from

•

The gas valve de-energizes

•

The inducer

•

The fan switches

•

Timed

NOTE4)
Heat

and the main

runs at its present
to (or stays

speed

If a new Heating

•

request

arrives

while

expires

or the Heat

response

speed

unless

24 VAC signals
•

applied

Same

a W2 signal
applied

Same light-off
inducer

NOTE5)

remains

period.

the control

is waiting

de-energizes

after the selected

in the Heat

Fan On Delay

expires

Fan Off Delay

Heat Fan Delay

time, the fan speed

for the new Heating

time expires.

switches

to High

request.

operation, 4th DIP switch must be in on position)

(see furnace wiring

of EFT control.

stage thermostat

operation

described

above

except

the control

will not go to high fire, High Heat fan

is applied.

to W1 and W2 terminals

routine as described

of EFT control.

for the signal stage thermostat

on high fire, the high fire solenoid

The EFT control

high fire and

440 01 2020 05

to W1 terminal

as single

postpurge

the Low Heat fan speed

Fan Off Delay

Heating Request (two stage thermostat
diagram):
24 VAC signals

go out.

at) Low Heat speed.

from the gas valve de-energizing,

until the Heat

burners

for a 5 second

responds

High Heat fan speed.

without

remains

delay to the presence

W1 only results

operation

energized

in low inducer,

except that at the end of the selected Heat Fan On Delay, the

and the High Heat fan speed energizes.

or loss of W2 (with Wl constant).
low fire and

W1 & W2 results

in high inducer,

Low Heat fan speed.

[_

Heating Request with Gas Supply Line Shut Off:
24 VAC signals

applied

motor

to Wl

turns

terminal

•

Inducer

•

The high fire solenoid

energizes.

•

Following

prepurge

•

The ignitor

glows

red-hot

•

The igniter

stays

off for 25 seconds,

•

The igniter

glows

red-hot

•

The pilot valve

•

The inducer

•

The SmartValve

•

The control

of EFT control.

on at high speed.

a 3 second

closes

delay,

the pilot valve

for 30 seconds,

then turns

then

begins

for 30 seconds,

3 seconds

de-energizes

5 seconds

proceeds

exits soft lockout

and flashes

after 5 minutes

begins

to warm

up.

again.

off.

de-energizes.

after the pilot valve

to soft lockout

and the ignitor

off.

to warm-up

then turns

after the igniter

opens

closes.

error

and begins

code 6.

another

ignition

sequence.

Gas Valve Diagnostic Codes (See Figure 45)
OFF
Heartbeat
1 Flash

= Control not powered
= Normal Operation
(Standby
= Not used

2 Flashes
3 Flashes

Low Pressure

(Note:

4
5
6
6

Flashes
Flashes
Flashes + 1 Note 1
Flashes + 2 Notes 1,2

=
=
=
=

Flame

closed

when

should

be open

switch circuit was still sensed as open 30 seconds
delay mode, with inducer off. After 5-minute
delay,

SV9541Q

Limit switch

On/Off

string

sensed

switch

in off position

during

During

a call for heat will generate

this diagnostic

code)

open

out of sequence

- Flame

signal

still present.

-Maximum

recycle

-Maximum

recycle

count exceeded

- Last failure

count exceeded

- Last failure

was Airflow

Proving

Circuit

Run, Cycling
Opened

Run

6 Flashes + 4 Notes 1,2 = Soft Lockout
7 Flashes
= Soft Lockout

Due to Limit Trips

Taking

Longer

than 2 minutes

was

Limit Circuit

to Reset;

Auto

Opened

Reset After

During

Run

1 Hour if

Call for Heat Still Present.
Reset by Cycling Call for Heat at Any Time.
= High Pressure
Switch closed when sould be open.
= High Pressure
Switch open when sould be closed.

8 Flashes
9 Flashes

1 : The 6 + X designation

indicates

a combination

of flash codes:

6 flashes

shows

to indicate the reason the control went into soft lockout. When the 6+ X code is flashing,
after a five minute delay period, if the call for heat is still present. Reset of the thermostat
NOTE
Sense

after the inducer was energized.
System
a new ignition sequence
will be initiated.

Soft Lockout -Maximum
retry count exceeded
(failed to light within 4 trials for ignition)
Soft Lockout -Maximum
recycle count exceeded
- Last failure was Flame Sense Lost During
Pressure
Switch or Blocked Condensate.

6 Flashes + 3 Notes 1,2 = Soft Lockout

NOTE

switch

Low Pressure
is in 5 minute

or call for heat)

2: Any combination
of 5 'abnormal'
Failure During Run, Airflow Proving

was the last 'abnormal'

event

Typical

Manifold
Adjustment
(Hidden)

the control

is in soft lockout,

followed

by X flashes

the SV9541 will attempt a new ignition sequence
will initiate a new ignition sequence
immediately.

events during a single call for heat will result in soft lockout. An 'abnormal'
event is a Flame
Circuit Open During Run, or Limit Circuit Open During Run. The flash code will indicate which

that put the system

into the soft lockout

state based

on the table above.

Gas Valve Honeywell

Manifold

nostic
Light
(on some models)

Pressure

LO AdJustment
HI

On/Off

Adjustment
INLET

OUTLET

OUTLET_

_

INLET
25-22-25a

25-22-49a

440 01 2020 05

HONEYWELL

SV9541Q "SMART

I

POWERAPPLIEDTO APPLIANCE

I

THERMOSTAT
CALLS
FOR
HEATI

i

VALVE"

Sequence

of Operation

1

t
HI AND LOWAIRPROVING
SWITCHESPROVEDOPEN?

_

WAIT FOR PRESSURESWITCHESTO OPEN I

COMBUSTIONAIR BLOWER
ON HIGHSPEED

]
"'ANOLOWA'RPROV'NOSW"C"ES
COMOUS,,ONOLOWERO
FIVE MINUTEWAITPERIOD

PROVEDCLOSEDWITHIN30 SECONDS?
YES
PRE-PURGE

I

P.LO, EOPENS:
L ,.REESECONOFLAME
IGNITORPOWERED

FAILURERECYCLEDELAY

PILOT LIGHTSAND FLAMEISSENSED _
DURING90
SECONDTRAILFOR
IGNITION?
(1)

I ""-I

PILOTVALVECLOSES;
PILOT IGNITOROFF

MAINVALVEOPENSON HIGH,
IGNITER"OFF"
ClRCULATINGFAN"ON"AND
COMBUSTIONAIRBLOWERON LOW
SPEED.MAIN VALVEON LOWFIRE
AFTERDELAY
(2)

V
FLAMESENSELOST?

PILOTAND MAINVALVECLOSE

COMBUSTIONBLOWER "OFF"AFTER
POSTPURGE

CIRCULATINGAIRFAN "OFF"AFTER
DELAY

[

CIRCULATINGAIR FANOFF
AFTERDELAY

FLAMESENSELOSTMORETHAN FIVE
TIMESIN THISCALL FOR HEAT?

COMBUSTIONAIRBLOWEROFF AFTER
POSTPURGE

t

/ NO
THERMOSTAT
CALL FOR HEAT ENDS

I

PILOTAND MAINVALVECLOSE

I

YES

(1) Ignitor turns "OFF" about 30 seconds into the trial for ignition. If the pilot flame has
not lit, it turns back "ON" for the final 30 seconds of the 90 second trial for ignition.
The pilot valve is energized during the entire trial for ignition. This is normal operation for the gas ignition system.
(2) If a W2 call for heat is present, circulating fan on high speed. Combustion air blower and main valve remain on high.
NOTE: If main limit string opens and takes longer than 2 minutes to close, system
goes into 1 hour wait period.

WAIT FORNEXTCALL FORHEAT

440 01 2020 05

[_

HONEYWELL
The 6 + X designation
the reason
LED

the control

SV9541Q "SMART
indicates
went

VALVE"

a combi nation of flash codes:
into soft lockout.

Last status

6 flashes

Trouble
shows

code indicates

INDICATES

shooting

the control

repair

is in soft lockout,

to address

followed

by X flashes

to indicate

first

CHECK/REPAIR

STATUS
Line voltage input at L1 and Neutral connectors on ST9162A Fan Timer.
Off

No power to system control.

Low voltage (24V) power at 24 VAC and COM terminals on ST9162A

Heartbeat

Normal indication whenever the system is powered, unless some

Bright - Dim

abnormal event has occurred.

System wiring harness is in good condition and securely connected.
Not Applicable - Normal Operation (stand by or call for heat)

2 Flashes

Low pressure switch closed when it should be open

Pressure switch stuck closed (system will wait for pressure switch to

(i.e. when call for heat begins),
(Combustion blower is not energized until pressure switches

open).

opens)

Pressure switch miswired orjumpered.

Low pressure switch, open when it should be closed (i.e. longer
than 30 seconds alter combustion blower/inducer is energized).
3 Flashes

Ignition system control switch must be in the ON position.
Pressure switch operation, tubing, and wiring.

System goes into 5-minute delay period, with combustion blower/

Restrictions in furnace air intake or vent piping.

inducer off. At end of the 5-minute delay, another cycle will begin.
Main limit switch.

Main Limit or Roll Out Switch is open.

Manual reset burner rollout switch.

4 Flashes

5 Flashes

Combustion blower is energized, Circulating blower is energized

Limit and rollout switch wiring is in good condition and securely

heat speed.

connected.

Flame signal sensed out of proper sequence.

Flame at pilot burner.

Combustion blower is energized, Circulating blower is energized
heat speed after the "ON" delay.
Soft Lockout.
Gas supply off or pressure too low or high for appliance to operate.
Damaged or broken HSI element
Failed to light pilot during 90 sec. trial for ignition
Line voltage HOT lead wire not connected to L1 terminal on ST9162A.

6 Flashes +
I Flash

Furnace not properly earth grounded.
Combustion air blower is de-energized, Circulating blower is deenergized after the "OFF" delay.

Flame sense rod contaminated or in incorrect position.
Pilot burner located in incorrect position.
Pilot burner lead wires are in good condition and popery connected.

After 5-minute delay time,control system will reset and initiate a

Pressure switches operation, tubing, and wiring.

new ignition sequence,
Soft Lockout.
Gas supply off or pressure too low or high for appliance to operate.
Last failure was Flame Sense lost during run.

Line voltage HOT lead wire not connected to L1 terminal on ST9162A.
Furnace not properly earth grounded.

6 Flashes +

Flame sense rod contaminated or in incorrect position.

Maximum recycle count exceeded

Pilot burner located in incorrect position.

2 Flashes
Combustion air blower is de-energized,

Circulating blower is

de-energized alter the "OFF" delay.

Pilot burner lead wires are in good condition and properly connected.
Cycling, pressure switch
Condensate drain blocked

After 5-minute delay time, control system will reset and initiate a

Pressure switches operation, tubing, and wiring.

new ignition sequence,

[_

440 01 2020 OS

HONEYWELL
LED
STATUS

SV9541Q "SMART

VALVE"

INDICATES

Trouble

shooting

continued

CHECK/REPAIR

SoftLockout.

Last failure was pressure switch
Ignition system control switch must be in the ON position.

6 Flashes +

Maximum recycle count exceeded

Pressure switches operation, tubing, and wiring.

3 Flashes

Restrictions in furnace air intake or vent piping.
Combustion air blower is de-energized, Circulating blower is

High winds blowing against vent.

de-energized after the "OFF" delay.

After 5-minute delay time, control system will reset and initiate a
new ignition sequence,
Soft Lockout.

Last failure was limit circuit opened during run.

Limit and rollout switch wiring is in good condition and securely

6 Flashes +
4 Flashes

Main limit switch.

Combustion air blower is de-energized,

Circulating blower is

de-energized after the "OFF" delay.

connected.
Restriction in duct work.
Dirty filter

After 5-minute delay time,control system will reset and initiate a
new ignition sequence,

SoftLockout.

7 Flashes

Blowerfailure(typical)

Deadblower.

Limittrip tooklongerthan2 minutesto reset.

Blockedductwork.

System will start a new ignition sequence after 1 hour, if call for
heat still present.

8 Flashes

High Pressure closed when should be open. (i.e., when call for

Pressure switches stuck closed (system will wait for pressure switch to

heat begins).

open).

(Combustion blower is not energized until pressure switches
open)

Pressure switch miswired orjumpered.

High Pressure open when should be closed. (i.e., longer than 30

Ignition system control switch must be in the "ON" position.

seconds after combustion/inducer is energized).
9 Flashes

Pressure switch operation, tubing and wiring.
System goes into a 5 minute delay period with combustion blower/
inducer"OFF". At end of the 5 minute delay another cycle begins.

440 01 2020 05

Restrictions in furnace air intake or vent piping.

[_

11. Concentric
Vent Termination

Vent Termination

Clearances
Kit Components
Kit Contents:

CARBON MONOXIDE
EXPLOSION HAZARD.

POISONING,

FIRE

AND

Failure to properly vent this furnace could result in
death, personal injury and/or property damage.

3" Rain Cap or 2" Rain Cap 1
3" Diameter SDR-26 Pipe, 19 /2" Long or
4" Diameter SDR-26 Pipe, 371/8" Long,
2" Diameter SDR-26 Pipe, 315/8" Long or
21/2" Diameter SDR-26 Pipe, 24" Long,
3" Y Concentric Fitting or 2" Y Concentric Fitting

Inlet and outlet pipes may NOT be vented directly
above each other (standard vent terminals).
1.

2.

Determine
termination
locations based on clearances
specified
in following
steps
and as shown
in Figure 7,
Figure 46 through Figure 51.
The vent termination
ground

3.

Nominal 3" or 4" Dia.

must

or normally

be located

expected

snow

at least

12" above

accumulation

levels.

2" or 3" Dia.
Y Concentric

Fitting

Pipe

2 or 2112" Dia.

2" or 3" Dia.

SDR-26

Rain Cap
25-22-03

Pipe

Do NOT terminate
over public walkways.
Avoid areas
where condensate
may cause problems
such as above
planters, patios, or adjacent to windows where steam may
cause

fogging.

4.

The vent termination
shall be located at least 4' horizontally
from any electric meter, gas meter, gas regulator, and any
relief equipment.
These
distances
apply ONLY to U.S.
installations.

5,

The vent termination
is to be located at least 3' above any
forced air inlet located within 10' ; and at least 10' from a
combustion
air intake of another
direct vent furnace intake.

6.

SDR-26

appliance,

In Canada, the Canadian
FuelGas
Codetakes
over the preceding termination
instructions.

except

Concentric

another

Vent t

precedence

Concentric Vent Termination - Kit #

Vent

Roof

Installation

Maintain 12" min. clearance
above highest anticipated
snow level. Max. of 24"
above roof.

Combustion
Air

NAHA001CV& NAHA002CV

Roof Boot/
These

kits are for vertical

tion air inlet
condensing
ameter pipe
ameter pipe
the furnace.

or horizontal

termination

of the combus-

Flashing
_
(Field Supplied)

and the exhaust vent pipes on Category
IV gas-fired
furnaces.
The NAHA001 CV kit can be used for 3" disystems. The NAHA002CV
kit can be used for 2" disystem. Refer to Table 10 for the correct pipe size for
Both the combustion
air inlet and the exhaust vent

Support
(Field Supplied)
Elbow
(Field Supplied)

pipes must attach to the termination
kit. The termination
kit must
terminate
outside the structure
and must be installed per the instructions outlined below for vertical or horizontal
termination.
Vertical termination
is preferred.
Field supplied
required to complete
the installation.

pipe and fittings

are
Vent
Combustion

Vertical & Horizontal Termination

Air
1,

Determine
the pipe diameters
required
from Table 10 and Figure 48.

2.

Determine

the

best

location

for the installation

for the termination

Support must be field installed to secure termination
kit.

kit to structure.

See

Figure47
for vertical
termination
or Figure46
and
Figure 51 for horizontal
termination.
Roof termination
is
preferred
since it is less susceptible
to damage,
has reduced intake contaminants
and less visible vent vapor. For
side wall termination,
consideration
should be given to: 1)
possible damage
from the vapors to plants/shrubs,
other
equipment
and building materials,
2) possible damage to
the terminal from foreign objects, 3) wind effects that may
cause recirculation
of flue products, debris or light snowand
4) visible vent vapor.

[_1

25-22-02

Note:

Cut one 5" diameter
NAHA001CV
Kit or
NAHA002CV
Kit.

hole
one

through
the
4" diameter

structure
hole

for the
for the

Dimension D may be lengthened to 60" max. or shortened
by cutting the pipes to 12" min. Dimension A will change according to D dimension. (See Figure 48)

440 01 2020 05

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii_i!ii!i!
:ii,,ii iiii!i!_!
i_ililililililiiiiiiiiii
Concentric
Drawing

Vent

Dimensional

Rain

B PVC
Vent/Exhaust

Cap to Vent

Pipe Assembly

Drill clearance

hole in rain

cap and pilot hole in vent pipe.

25-22-03

Stainless steel screw
(Field supplied)

_-PVC Intake/Combustion
"-,

A

Model

A_

B

C

D**

NAHA001CV

333/8

2

31/2

16//8

NAHA002CV

38//8

3

41/2

211/8

CARBON MONOXIDE POISONING HAZARD.

= Dimension will change accordingly as dimension D is
lengthened or shortened.
_ = Dimension D may be lengthened to 60" may also be shortened

Failure to follow this warning
could result
personal
injury and/or property
damage.

When using the alternate
screw assembly
method,
drill a clearance
hole in the rain cap and a pilot hole
in the vent pipe for the screw
size being
used.
Failure to drill adequate
holes may cause cracking
of the PVC components,
allowing
flue gases to be
recirculated.

by cutting the pipes provided in the kit to 12" minimum

Concentric
NAHA001CV

Termination

Piping

...............................................................
Table Dual
50,000
NAHA002CV

1. Do not include
elbow count.

& 75,000

Btuh

ONLY

Furnace

CARBON MONOXIDE POISONING HAZARD.

- 35' & (4) 90 ° elbows with 2" PVC pipe

100,000
NAHA001CV

Kit

Venting

& NAHA002VC

& 125,000

Btuh

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

Furnace

- 35' & (4) 90 ° elbows with 3" PVC pipe
the field

supplied

45 ° elbow

in the total

2. If more than four elbows
are required,
reduce the length
of both the inlet and the exhaust
pipes five feet for each
additional
elbow used.
3. Elbows

are DWV

long

If more than four elbows
both the inlet and exhaust
used.
*Feet of pipe is whichever
or outlet side.

radius

type

Do not operate the furnace with the rain cap
removed as recirulation
of the flue gases may
occur. Water may also collect inside the larger
combustion
air pipe and flow to the burner
enclosure.

for 2" and 3" vents.

are required,
reduce
the length of
pipes 5' for each additional
elbow

pipe run is the longest,

either

inlet

If assembly needs to be extended to meet height or side wall thickness requirement,
the two pipes supplied
in the kit may be replaced by using the same diameter
solid, single
(no coupling
connections)
field supplied
SDR-26
PVC (ASTM D2241) pipes.
Do not extend dimension
D more than 60". (See Figure 48)
Do not use field supplied
couplings
to extend
the pipes.
Airflow
restriction
will occur and the furnace
pressure
switch
may cause intermittent
operation.
5.

in death,

Install the Y concentric
fitting and the pipe assembly through
the structure's
hole. For vertical termination,
install the parts
through the field supplied roof boot/flashing.
NOTE: Do not
allow insulation or other materials to accumulate
inside the
pipe assembly

when

installing

through

the structure's

NOTE: Ensure the termination
height is above the roof surface or anticipated
snow level as shown in Figure 47 for
vertical termination.
Ensure the termination
location clearance dimensions
are as shown
for horizontal
termination.

in Figure

50 and Figure

Partially
assemble
the concentric
vent termination
kit.
Clean and cement the parts using the procedures
for Joining Pipe and Fittings section of the manual. A) Cement the Y
Concentric
fitting
to the 4" diameter
kit pipe.
(See
Figure 49) B) Cement the 3" rain cap to the 21/2" diameter
kit part. (See Figure 49) NOTE: A field supplied
stainless
steel screw may be used to secure the rain cap to the pipe
instead of cementing
when field disassembly
is desired for
cleaning
(See Figure 49)

440 01 2020 05

hole.

Secure the assembly to the structure as shown in Figure 47
or Figure 51 using field supplied metal strapping or equivalent material.

[_

51

Concentric
Vent
Side Termination

and

Combustion-Air

8.

Install the rain cap and the small diameter pipe assembly in
the Y concentric
fitting and the large pipe assembly. Ensure
that the small diameter
pipe is bottomed
out and securely
cemented
in the Y concentric
fitting.

9.

Cement the furnace combustion
air and vent pipes
concentric
vent termination
assembly.
See Figure
Figure 51 for proper pipe attachment.

10.

Operate the furnace through one heat cycle to ensure combustion air and vent pipes are properly
connected
to the
concentric
termination
connections.

Roof Overhang

12" min. 11

to the
47 or

Maintain 12" clearance above highest
' anticipated snow level or grade
whichever is greater.
25-22-02
Concentric
Attachment

Vent

Sidewall

Strap
(Field Supplied) _

Air
Combustion

;;;;;;

ent

F,uahto

;;;;;;

Air

1"

max.

45 ° Elbow
(Field Supplied)
25-22-02

Note:
Securing
mination

[_

strap must be field installed
kit in side wall.

to prevent

movement

of ter-

440 01 2020 05

Four Position

Furnace
Models
Dual Certified
*9MPT050F12B1
*9MPT075F14B1
*9MPT100J16B1
*9MPT125L20B1
*9MPV050F12B1
*9MPV075F12B1
*9M PV100J16B1
*9MPV125L20B1
* Denotes

Brand

25-23-30

International
Comfort
Lewisburg, TN 37091
Fast Parts Division
866-380-3278

Save This

440 01 202005

Manual

For Future

Products,

LLC

Reference

[_

TECHNICAL

SUPPORT

Specifications
*9MPT050F12B

*9MPTO75F14B

*9MPT100J16B

*gMPT125L20B

General
GasType

Nat

L.P.

Nat

L.P.

Transformer Size (VA)
T'stat Heat Anticipator
Input(Btuh) Std/AIt.
Output(Btuh) Std/AIt.
Temp. Rise (F)

Nat

L.P.

Nat

L.P.

40
.10

Hi Fire
Lo Fire
HiFire
Lo Fire
Hi Fire
Lo Fire

Electrical(Volts/Hz/FLA)
Gas & Ignition
GasType
Std.Main Orifices (No/Size)
Gas Valve (Honeywell)
Regulation Type
Manifold Press.
Hi Fire (" WC)
Lo Fire (" WC)
Pilot Orifice Size

50,000
35,000
46,000
32,200
35-65
25-55

75,000
53,000
67,500
48,800
40-70
30-60

100,000
70,000
92,000
64,400
40-70
30-60

125,000
87,500
115,000
80,500
40-70
30-60

115/60/9.8

115/60/9.0

115/60/9.0

115/60/11.2

Nat.
2/42
SV 9541
SNAP
3.5
1.7
.018
HSP

Ignition Type/Series
Combustion
Flue Outlet Size (Inches)
Std. Outlet Temp (° F)

L.P.
2/54
SV 9541
SNAP
10.0
4.9
.011
HSP

2
<140

Nat.
3/42
SV 9541
SNAP
3.5
1.7
.018
HSP

L.P.
3/54
SV 9541
SNAP
10.0
4.9
.011
HSP

Nat.
4/42
SV 9541
SNAP
3.5
1.7
.018
HSP

2
<140

L.P.
4/54
SV 9541
SNAP
10.0
4.9
.011
HSP

3
<140

@ Blower / @ Transition Box (HiFire)
Std. Pressures (" of WC)
5' No Elbows
40' +5-90 ° DWV Elbows

-1.80 / -2.60
-1.30 / -2.30

-1.80 / -2.60
-1.30 / -2.30

-1.80 / -2.60
-1.70 / -2.50

@ Blower / @ Transition Box (Lo Fire)
Std. Pressures (" of WC)
5' No Elbows
40' +5-90 ° DWV Elbows

-1.20 / -1.90
-1.00 / -1.80

-1.20 / -1.90
-1.00 / -1.80

-1.20 / -1.90
-1.00 / -1.80

Nat.
5142
SV 9541
SNAP
3.5
1.7
.018
HSP

L.P.
5154
SV 9541
SNAP
10.0
4.9
.011
HSP

3
<140

-1.80 / -2.60
-1.70/-2.50

Fan Controls
HW ST9162A

Fan Control (Type)
Fan Control
On
(Timed-secs)

30/60
60,100,140,180

Off

Limits& Controls
300
260

300
210

300
24O

3OO
180

Std. Pressure Sw. (Part No)
Blower Switch Pressure (Close)
Blower Switch Pressure (Open)
Transition Switch Pressure (Close)
Transition Switch Pressure (Open)

1013515
0.95
0.80
1.70
1.50

1013515
0.95
0.80
1.70
1.50

1013515
0.95
0.80
1.70
1.50

1013166
1.30
1.10
1.80
1.60

High Altitude Pressure Sw. (Part No)
Blower Switch Pressure (Close)
Blower Switch Pressure (Open)
Transition Switch Pressure (Close)
Transition Switch Pressure (Open)

1013165
0.70
0.55
1.40
1.20

1013165
0.70
0.55
1.40
1.20

1013165
0.70
0.55
1.40
1.20

1013157
0.85
0.70
1.70
1.50

11-8
10/1050
PSC/I/2
101370
16x25xl

11-10
1011050
PSC/II2
10/370
16x25xl

11-10
10/1050
PSC/I/2
10/370
16x25xl

RolloutSwitch(F)
LimitControl Settin9 (F)

Blower Data
Type & Size
MotorAmpslRpm
MotorTypelH.p.
Cap.Mfd/Volts
FilterType& Size (Permanent- supplied)
CoolCap. (Tons)@ .5" W.C. L, ML, MHi& Hi

1112,2,21/2,3

1112,2,2112,3.5

2112,3,31/2,4

11-10
13N00
PSC/3/4
40/370
16x25x1(2)
3112,4,4112,5

Gas Conversion
Kits All Models
Nat to LP
NAHFOO2LP *1011789
LP to Nat
NAHFOO2NG *1011787
*Order from Service Parts

[_

THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE

44001202005

CIRCULATION
AIRBLOWERDATA
For050Models3 TonUnits

For 075 Models 3.5 Ton Units

Speed
Tap

Low

Med L

Med H

Hi

0.1

828

1083

1301

1408

0.2

804

1050

1242

1347

q
.93
"6

0.3

770

1028

1195

1295

0.4

735

985

1153

1237

_
E_
®

0.5

698

952

1093

1183

0.6

657

909

1040

1118

w

0.7

---

863

935

1053

0.8

....

812

865

976

0.9

......

802

887

1.0

......

720

787

For 100 Models 4 Ton Units

Speed
Tap

Low

Med L

Med H

Hi

0.1

695

1025

1455

1724

0.2

674

1001

1410

1662

_" o."
.£ 3
"6

0.3

653

951

1366

1601

0.4

631

921

1309

1530

-_ -_
E_=

0.5

609

891

1252

1460

0.6

569

845

1187

1380

0.7

529

799

1122

1300

0.8

490

730

1030

1190

0.9

---

680

950

1080

1.0

......

831

969

._

For 125 Models 5 Ton Units

Speed
Tap

Low

Med L

Med H

Hi

Speed
Tap

Low

Med L

Med H

Hi

0.1

823

1109

1527

1850

0.1

1720

1910

2127

2315

0.2

795

1087

1482

1791

0.2

1686

1881

2087

2268

q
.93
"6

0.3

747

1056

1426

1720

0.3

1644

1833

2024

2201

0.4

677

1016

1382

1648

q
.93
"6

0.4

1600

1777

1961

2131

_
E_

0.5

617

970

1317

1575

1533

1720

1891

2029

544

854

1245

1485

_
E_

0.5

0.6

0.6

1494

1647

1804

1948

w

0.7

---

763

1154

1401

w

0.7

1413

1571

1708

1820

0.8

---

652

1043

1284

0.8

1306

1470

1604

1730

0.9

......

905

1161

0.9

....

1349

1484

1614

1.0

......

737

1028

1.0

........

1328

1430

44001202005

THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE

[_

WARNING: ELECTRICALSHOCK HAZARD

CONNECTION DIAGRAM

DISCONNECT

BEFORE

LADDER
J

FIELD
CONNECTION
BOX

/ GAS

NEUTRAL

BK

VALVE

OH
(HI

v

115V_OHZ

SWITCH
_NTERLOCK /_,,

r:m,, ,_

HEAT

Fq

__

#

H

MHI

B!L

CONT

_)M1

II

LO(R)

j

CARAO'TOR
II
<:9:::::=d

(LP SV_D] CL% ONLY)

_ @_L

[

_L([

SK

E

__

tNDIN
IL[

__

G@

_

_

C

_r

CAPACITOR
(SOME
MODELS)

__

EAON_

HUM

4

HUMCC==

_

24_

IGNITER

sE.soRII

DEPENDING

BK

R

CAPACITOR

j

(SOME

I

PRESSURE

i

I

I

--L

METERS

WILL READ

SPEED
BLACK-HI
ORANGE-MHI
13-16 VOLTS

TAP CODE
BLUE-MLO
RED-LO

TO

SWITCH IN THE RECTIFIED AC VOLTAGE
CIRCUIT.
2. FACTORY CONNECTED
WHEN BVSS, (CHIMNEY
ADAPTOR
ACCESSORY
KIT) OR LP PRESS. SWITCH, IS NOT INSTALLED.
,

SW,TCH

MODELS)

H GH

1. MOST VOLT

MODEL

i i

CAPACITOR

II
I
I TN # OSTAT
I

@1
ON

LOW

.................
,i W ,s,_, ,-2-STAGE
THERMOSTAT

===5

ROTLoLOUNT SSEVVRITCsH

E_

AENSE

HUM

It

N
o==

q

--

)

TRANSFORMER

@

CONT

EA'_"'
_)

(_: =O--_
115V,
LI
_

:

2 STAGE

INDL
_INMDoUTC_R

_:_

--Y

l

(OPT)

"_NOTE_

_L

)

(0)

MLO(BL)
_

11
J ii LPPRESSURE
m

I

zoo

NEUTRAL

_
_O7-HI (BK)

COOL

-LE_ m.J'_-

LL_ _

SWITCH

, ,_

#t_ jr-

PR_%_RE

.....

-/

CONDUCTORS

w

4_

L

PRESSURE
SWITCH

FIELD)

ONLY

ON MODEL•

y

}
VOLT
COPPER

HOT

1 TO 3 IN

R

IGNgER

/

S@H
SERIES DEPENDING

SWITCH
115V

MAINLIMIT
_OLLO_

R

DIAGRAM

SERVICING

CHASSIS ON BOTH SIDES OF AN OPEN LIMIT OR PRESSURE
SEE MANUALS
FOR ADJUSTING
SPEED
TAPS
FOR
PROPER
HEATING,
COOLING&
CIRCULATING
SPEEDS•

LINE
LOW
LOW

i
IF
=

VOLTAGE
VOLTAGE
VOLTAGE

FIELD
FACTORY
FIELD

LINE
VOLTAGE
FACTORY
RECTIFIED
AC VOLTAGE
FACTORY
INTERNAL
CIRCUIT
BOARD
WIRING

COLOR

CODE

BLACK
BLUE
BROWN

BK
BL
BR

ORANGE
RED
WHITE

O
R
W

GREEN
YELLOW
PURPLE

G
Y
P

I
h

I I_,L_L

THERMOSTAT

"

@'

i_,_otV2_L_o,i

L_H

I
II
[

IF ANY
IT MUST

OF THE

ORIGINAL

BE REPLACED

WIRE
WITH

AS SUPPUED
TYPE

AWM-IO5_C

WITH
WIRE

THE
OR

APPLIANCE
EQUIV__

MUST
1 329531

BE REPLACED,
"I 01

REV.A

HH

S

OL

H
71

\

%

AA

9L
99

LL
A
AA

0

N

Representative

drawing

only, some models

may vary in appearance.

25-23-95

I

Replacement

Parts

- *9MPT

Models - *9MPTO5OF12B1, *9MPTO75F14B1, *9MPTIOOJ16B1 & *9MPT125L2OB1 (Natural Gas)
Replacement part supplied will be current active part. For aarts not listed, consult place of purchase.
*9MPT
Key
No.
1

2

3
4
5

6

Description
Functional
Heat Exchange_Prima_

Heat Exchanger,Secondary

Motor,Blower 1/1151/2CCW
1/1153/4CCW

Part
Number
1012850
1012854
1012858
1012862

1

1013762
1013763
1013765
1013767

1

1172488
1172489

1

1014824
1014823

Mount,Motorkit'

1013011
1011420

Wheel, Blower

Transformer

050
F12

1012722

07S
F14

100
J16

*gMPT
125
L20

1012866
1012867
1012868

I

I

1012603
1012604
1012605

I

I

1

1172008
1172005
1172006
1172007

I

1

1012972
1012888
721020013
721020008

I
2

1

A
1
1

1
1

1
1

1

1
1
1

1
1

1
1

1

1014459

1

1

1

1

9

Switch,Interlock

1171981

1

1

1

1

10

Switch,Pressure

1013166
1013515

1

1

1

1

1014339
1014340

1

1

1
1

Valve,Gas HSP Nat.2 Stage

1013351

1

1

1

1

13

Burner,PilotHSP

1008731

1

1

1

1

14

Igniter/SensorHSP

1009524

1

1

1

1

15

Orifice,Burner#42 Nat.

1011351

2

3

4

5

16

Switch,Limit(Rollout)

1013102

2

2

2

2

17

BurnerAssembly

1008723
1008724
1008725
1008726

1

1320366
34335002
1008445
34335001

1

503211

1

20

Orifice,Pilot .018
Filter,HH 16X25X112"

1010365

Housing,Blower

J

Panel, BlowerCutoff

1

2

Bellyband Location
on Motor
Model *9MPT

2.09"

O75F14B1

1.81"

1OOJ16B1

1.81"

125L2OB1

1.65"

I

I

2

2

2

Door, Front (Comfortmakeronly)
(Comfortmakeronly)
(Comfortmakeronly)
(Hellonly)
(Hellonly)
(Hellonly)
(Tempstaronly)
(Tempstaronly)
(Tempstaronly)

1

O

Clamp, Capacitor

1170643
1014315

1

1

P

TransitionAssembly

1012281
1012282
1012283

1

1

Gasket, Blower

1014425

1

1

Board, Insulating

1012418
1012419
1012420

1

1

1012244
1012245
1012246

1

1013263
1013080
1013083
1013084

1

1012594
1012595
1012596

1

1012650
1012648
1012651
1012653

1

Q

location on motor
S

T

U

V

[_1

I

1014194
1014197
1014200
1014195
1014198
1014201
1014196
1014199
1014202

Box, Collector

A(in.)

050F12B1

I

1

R
*See Table below for bellyband

I

1013680
1013681
1014494

1
2

I

BracketAsy.,Door Filler

1

1

I

1

1

1

I

1014203
1014206
1014209
1014204
1014207
1014210
1014205
1014207
1014211

1

1

I

Door, Blower (Comfortmakeronly)
(Comfortmakeronly)
(Comfortmakeronly)
(Hellonly)
(Hellonly)
(Hellonly)
(Tempstaronly)
(Tempstaronly)
(Tempstaronly)

1

1

I

Hanger, Blower

1
--

I

L

N

Gasket, Transition

Gasket, CollectorBox

Partition,Front HeatExchanger

125
L2O

I

K

M

100
J16
I

1012328

1

--

Partition,Blower

H

1

12

19

F

1

Control,Fan Timer

Switch,Limit(Main)

Gasket, Top Panel

1

8

18

B

1

1

Blower,Exhaust

Panel, Top

1

1

Part
Number

075
F14

1171929
1171982

11

Description
Non-Functional

050
F12

Capacitor, 10Mfd.,370V
40MN., 370V

7

Key
No.

I

1
1
1

1
1
1

1

1
1
1
1
1
1
1
1
1

1

1
1
1

1

1
1
1
1
1
1
1
1

1

1
1
1
1
1
1
1
1
1
1
1
1
1
1

440 01 202005

I

Replacement

Parts

- *9MPT

Models - _9MPTO5OF12B1, _9MPTO75F14B1, _9MPTIOOJ16B1 & _9MPT125L2OB1 (Natural Gas)
Replacement part supplied will be current active part. For parts not listed, consult place of purchase.
_9MPT
Key
No,
W

X
Y
Z

Description
Functional
Gasket, Attachment Plate

Cover,Junction Box
Box, Junction
Tube,Pilot

Part
Number
1012542
1012543
1012544
1012545
1012350
1012349

050
F12

2
2
1
1

1012832
1013189
1013077

1

1

BB

Manifold

1012970
1012971
1012278
1012279

1

EE

Baffle, Burner Box

Top, BurnerBox

1
1

1
1

1

1

1013702
1013703
1013704

1

1

1

1

1

1

)(

Tube, 112"Elbow

1171992

2

2

2

2

1

1

1

1
1

)(

Connector,314"X 112"

1171995

1

1

1

1

)(

Elbow,112"CPVCstreet

1171996

1

1

1

1

1

)(

Grommet,Casing

1170977

1

1

1

1

1

)(

Tube, Relief Ext.

1009238

1

1

1

1

)(

Connector,ReliefTube

1171998

1

1

1

1

)(

Plate,Cover

1171999

1

1

1

1

Gasket,Cover Plate

1172000

1

1

1

1

)(

Cap, DrainTee

1172001

1

1

1

1

)(

Clamp,Tee Cap

1172002

1

1

1

1

)(

Manual,Users

44102201004

1

1

1

1

)(

Manual,Installation

44001202005

1

1

1

1

1
1
1
1
1
1
1
1
1

2

2

2

2

2

2

2

2

HH

Bracket,ControIMounting

1013677

1

1

1

1

JJ

Tube, Sensor

1009238

1

1

1

1

KK

Trap,Drain Assembly

1171917

1

1

1

1

LL

Sightglass

1013235
1013236

1
1

1
1

1
1

1
1

MM

Wrapper,FilterRack

741010039

1

1

2

2

NN

Front, Filter Rack

741020001

1

1

2

2

OO

Cover,Filter

2791043

1

1

2

2

Clip, Filter

1008482

3

3

3

3

QQ

Gasket,Trap

1013701

1

1

1

1

RR

Bracket,Trap

1171986

1

1

1

1

SS

Bracket,Trap Bracket

1171987

1

1

1

1

TT

Tube, DrainColl. Box 518"ID

1171988

1

1

1

1

UU

Tube, DrainTee 1/2" ID

1171989

1

1

1

1

VV Tube, Relief
WW Drain Vent

1009238

1

1

1

1

1014003

1

1

1

1

YY

1171915

1

1

1

1

)(

PARTNOT ILLUSTRATED

)(

Door Screws

1014488

4

4

4

4

)(

Door ScrewGrommets

1171990

4

4

4

4

)(

Coupling,Air Intake

1002284

1

1

1

1

)(

Gasket, Air Intake

1012583

1

1

1

1

)(

Clamp, Hose5/8"

1012975

4

4

4

4

)(

Clamp, Hose3/4"

1012976

2

2

2

2

)(

Coupling,Discharge

1002522

2

2

2

2

)(

Clamp Hose

1013830

4

4

4

4

)(

Grommet,Vent

1012697

1

1

1

1

Bushing, Strain Relief

1945287

1

1

1

1

Grommet,Vinyl (Gas Inlet)

1009535

1

1

1

1

Harness,Wire

1013689
1013690

1

1
1

1

440 01 2020 05

1

1

1

1012532

)(

1

1171991

1

1012377

)(

1171916

Tube, Drain 112"ID Drain

1

Bracket,Burner Box Side

)(

Trap, DrainTee

)(

1

Bracket,ManifoldSupport

Tee, Drain

)(

1171994

FF

PP

125
L20

Coupling,112"Barbed

GG

(Tempstaronly)

100
J16

Tubing,518"ID Drain

1

1012338
1012339
1012340

075
F14

)(

1
1

050
F12

)(

1

1012334
1012335
1012336

Part
Number

1

1

1

Description
Functional

1171993

1

1010901

DD

125
L20

2

Bracket,Pilot

Bottom,BurnerBox

100
J16

2

AA

CC

075
F14

*9MPT
Key
No.

)(

Gas Conversion

Kits - All models

Nat to LP

*1011789

LP to Nat

*1011787

* Must be ordered from Service Parts

TECHNICAL

SUPPORT

Specifications
_gMPV050F12B

*gMPV075F12B

_gMPV100J20B

_9MPV125L20B

General
GasType

Nat

L.P.

Nat

L.P.

Transformer Size (VA)
T'stat Heat Anticipator
Input(8tuh) Std/AIt.
Output(8tuh) Std/AIt.
Temp.Rise (F)

Electrical(Volts/Hz/FLA)

Gas Valve Honeywell
Regulation Type
Manifold Press.
Hi Fire (" WC)
Lo Fire (" WC)
Pilot Orifice Size

L.P.

Nat

L.P.

40
.10

Hi Fire
Lo Fire
Hi Fire
Lo Fire
Hi Fire
Lo Fire

Gas & Ignition
GasType
Std.Main Orifices(No/Size)

Nat

50,000
35,000
46,000
32,200
35-65
35-65

75,000
52,500
70,500
48,800
40-70
40-70

100,000
70,000
92,000
64,400
40-70
40-70

125,000
87,500
115,000
80,500
40-70
40-70

115/60/9.8

115/60/8.9

115/60/9.0

115/60/11.2

Nat.
2t42

L.P.
2/54

Nat.
3/42

L.P.
3/54

Nat.
4/42

L.P.
4/54

Nat.
5/42

L.P.
5/54

SV 9541
SNAP
3.5
1.7
.018

SV 9541
SNAP
10.0
4.9
.011

SV 9541
SNAP
3.5
1.7
.018

SV 9541
SNAP
10.0
4.9
.011

SV 9541
SNAP
3.5
1.7
.018

SV 9541
SNAP
10.0
4.9
.011

SV 9541
SNAP
3.5
1.7
.018

SV 9541
SNAP
10.0
4.9
.011

HW HSP

Ignition Type/Series
Combustion
Flue Outlet Size (Inches)
Std. Outlet Temp (o F)
Comb. Blower (MFD/Volts)

2
<140
41370

@ Blower I @ Transition Box (Hi Fire)
Std. Pressures (" of WC)
5' No Elbows
40' +5-90 ° DWV Elbows
@ Blower/@ TransitionBox (Lo Fire)
Std. Pressures (" of WC)
5' No Elbows
40' +5-90 ° DWV Elbows

-1.20 / -1.90
-1.OO / -1.80

2
<140
4/370

3
<140
4/370

3
<140
4/370

-1.80 / -2.60
-1.30 / -2.30

-1.80 / -2.60
-1.70/-2.50

-1.80 / -2.60
-1.70 / -2.50

-1.20 / -1.90
-1.OO / -1.80

-1.20/-1.90
-1.00 / -1.80

300
210

300
240

300
190

Limits & Controls
300
260

RolloutSwitch(F)
LimitControlSetting (F)
Fan Control (Type)
Fan Control

On

(Timed-secs)

Off

HW ST9162A
30/60
60,100,140,180

Std. Pressure Sw. (Part No)
(Hi Fire)Blwer Switch Press (Close)
Blower Switch Pressure (Open)
(Lo Fire)Trans Switch Press (Close)
Transition Switch Pressure (Open)

1013515
0.95
0.80
1.70
1.50

1013515
0.95
0.80
1.70
1.50

1013515
0.95
0.80
1.70
1.50

1013166
1.30
1.10
1.80
1.60

High Altitude Pressure Sw. (Part No)
(Hi Fire)Blwer Switch Press (Close)
Blower Switch Pressure (Open)
(Lo Fire)Trans Switch Press (Close)
Transition Switch Pressure (Open)

1013165
0.70
0.55
1.40
1.20

1013165
0.70
0.55
1.40
1.20

1013165
0.70
0.55
1.40
1.20

1013157
0.85
0.70
1.70
1.50

11-8
9.8/1050
D0/1/2
16x25x1
1.5
3

11-10
8.9/1080
DC/1
16x25x1
1.5
3

11-10
11.2t1150
DC/1
16x25x1
2
5

11-10
11.2/1150
DC/1

Blower Data
Type & Size
MotorAmps/Rpm
MotorType/H.p.
FilterType& Size (Permanent- supplied)
Min. CoolCap. (Tons)
Max.Cool Cap. (Tons)

16x25x1(2)
2
5

Gas Conversion
Kits All Models
Natto LP
_1011789
LP to Nat
q011787
_Order from Service Parts

E_

THIS DATA IS SUBJECT

TO CHANGE

WITHOUT

NOTICE

440 01 2020 05

Circulation
Heating,
Continuous
Switch

Blower

Air Blower

Cooling

Data - *gMPV

& Continuous

Airflow

(CFM) @ 0.10" Static
Furnace

Settings

Settings

Lo Heat Air Temperature

Model

Switch

Adjustment
Furnace

Model

#1

#2

50K

75K

100K

125K

#3

#4

#5

50K

75K

lOOK

125K

O*

O*

540

540

700

703

0"*

0"*

0"*

0

0

0

0

0

1

660

660

860

821

0

0

1

1

1

1

6

1

0

780

780

1020

1000

0

1

0

4

2

2

8

1

1

900

900

1180

1160

0

1

1

7

3

5

12

1

0

0

11

6

8

16

1

0

1

-7

-4

-5

-1

1

1

0

-11

-6

-9

-4

1

1

1

-15

-9

-11

-7

*Factory Setting
Hi Heat Air Temperature
Switch

Settings

Adjustment
Furnace

(° F) **

Settings

(° F)**

Model

#3

#4

#5

50K

75K

100K

125K

0"*

0"*

0"*

0

0

0

0

*Factory setting

0

0

1

3

2

3

2

*'Approximate
air temperature
static on high heat ).

0

1

0

6

4

5

6

0

1

1

14

6

9

11

1

0

0

17

11

13

13

1

0

1

-8

-4

-4

Cooling
Switch

-5

1

1

0

-13

-4

-7

-5

1

1

1

-17

-4

-9

-5

(CFM) @ 0.50" Static

Settings

Furnace

Model

#6

#7

#8

50K

75K

1OOK

125K

O*

0*

0*

1170

1395

2095

2059

0

0

1

1098

1197

1875

1859

0

1

0

991

1096

1642

1700

0

1

1

894

1000

1489

1621

1

0

0

807

907

1255

1410

1

0

1

697

799

1013

1191

1

1

0

621

650

830

986

1

1

1

556

543

750

800

*Factory setting
**Approximate air temperature
static on high heat ).

change from factory setting @ 0.20"

change from factory setting @ 0.20"

*Factory

setting

Blower Motor Settings

[OONT'"UOOS]
I
]1OOO""O
]
010
123456

ON
;

*EXAMPLE
Cooling Airflows
6,7&8:

[1 [1 [1 [1 D

1
1<_>8

OFF

;
0

DIP

l

000
001
010
011

INPUT
SIGNAL OR
THERMOSTAT
CONNECTIONS

SWITCHES

3.5
3.0
2.5
2.0

Switches

Ton
Ton
Ton
Ton

*See "Technical
Support
Manual" for correct
airflow
rates,
25-23-10

440 01 2020 05

THIS DATA IS SUBJECT

TO CHANGE

WITHOUT

NOTICE

[_

Circulation
Heating,

Air Blower

Cooling

& Continuous

Data - *gMPV
Airflow

Settings

Figure 1
_9MPV050

COOLING

(CFM VS. EXTERNAL STATIC PRESSURE)

+000
-- --001
..... 010
_011

i,

O
u_

_100
_101
-t,-110
-_-111

o
0.1

0.3

0.5

02

ESP" W.C.
Figure 2
_9MPV050

Hi HEAT

(CFM VS. EXTERNAL STATIC PRESSURE)
1200

lOOO

800

_ooo
- -OOl
---OLO
-_-Oll
_1oo
_1o1,11o,111

U.

600

400

200

o
0.1

0.2

0.5

0.7

1

ESP" W.C.
I_

THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE

440 01 2020 05

Circulation
Heating,
Figure

Air Blower

Cooling

Data - *gMPV

& Continuous

Airflow

Settings

3

*9MPV050
(CFM

VS. EXTERNAL

Lo HEAT
STATIC

PRESSURE)

1000
900
800

700

_

'_

_o11
_000

----001

,oo--<___._

_

500

0

300

"_

_

_,_

__,_

_leo
_101
.-I-110
._.111

200
100
0
0,1

0.2

0.5

0.7

1

ESP" W.C.
Figure

4

*9MPV075
(CFM
18oo .............................................

VS. EXTERNAL

COOLING
STATIC

PRESSURE)

16oo

14oo

12oo

_ooo

lOOO
U.

o
800
<
600

--1001
_010
_011
_I00
I---101
"S--ll0
"_/_I11

400

200

o
0.1

0,3

0,5

0.7

ESP" W.C.
440 01 2020 05

THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE

[_

Circulation
Heating,

Air Blower

Cooling

& Continuous

Data - *gMPV
Airflow

Settings

Figure 5
_9MPV075

Hi HEAT

(CFM VS. EXTERNAL STATIC PRESSURE)
1400

1200

1000

_ooo
- -OOl
---OLO
_-Oll
_1oo
_1o1,11o,111

800
u,,,

'O
o')

6OO

400

200

0
0,1

0.2

0.5

0.7

1

ESP" W.C.
Figure

6

_9MPV075

Lo HEAT

(CFM VS. EXTERNAL STATIC PRESSURE)

_ooo
-m-OOl
"_1010

_011
_I00
_I01

i,

0
oo

i-ii10

i_-lll

o
o.1

0.2

0.5

0.7

ESP" W.C.
[_1

THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE

440 01 2020 05

Circulation
Heating,

Air Blower

Cooling

Data - *gMPV

& Continuous

Airflow

Settings

Figure 7
_9MPVIO0

COOLING

(CFM VS. EXTERNAL STATIC PRESSURE)

I 1000
----001
•-_--010
_011
_I00
_I01
_II0
_III

u.

O
(n

0.1

0.3

0.5

0.7

ESP" W.C.
Figure 8
*9MPVIO0

Hi HEAT

(CFM VS. EXTERNAL STATIC PRESSURE)

2500

2000

-...._ _
1500
i,

0
oo

1000

500

0.1

0,2

0.3

0.5

0.7

ESP" W.C.
440 01 2020

05

THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE

[_

Circulation
Heating,
Figure

Air Blower

Cooling

Data - *gMPV

& Continuous

Airflow

Settings

9

*9MPVIO0

Lo HEAT

(CFM VS. EXTERNAL STATIC PRESSURE)
1800

1600
1400

1200

_ooo
--1001

_E
,_
oo

"_'_010

1000

_OlI
_IOO

800

1---101

600

--S--ll
o
-_-I11

400

200

0.1

0.2

0.3

0.5

0.7

ESP"W.C.
Figure 10
_9MPV125

COOLING

(CFM VS. EXTERNAL STATIC PRESSURE)
2500 .............................................

2OO0

_;

,-m-ooo
-,,,,-OOl

1500

,,-1_,-OlO
_Oll
_1oo
,,-e,-lOl
,,-m,-11o

W.

O
E

100o

,,_,-111

500

0
0.1

0.3

0.5

0.7

ESP" W.C.
[_

THIS DATA IS SUBJECT

TO CHANGE

WITHOUT

NOTICE

440 01 2020 05

Circulation
Heating,
Figure

Air Blower

Cooling

Data - *gMPV

& Continuous

Airflow

Settings

11

_9MPV125
(CFM

VS. EXTERNAL

Lo HEAT
STATIC

PRESSURE)

2500

2000

_ooo
-- --OOl
----OlO
_Oll
_1oo
_1Ol
,-_11o
-_ 111

1500

1000

500

0

0.1

0.2

0.5
ESP" W.C.

0.7

Figure 12
_9MPV125

Hi HEAT

(CFM VS. EXTERNAL STATIC PRESSURE)

-ii

[_000
-- --001
,--,--010

oo

_011
_100
L_1O1,11o,111

o

0.1

440 01 2020 05

0.2

0.5
ESP" W.C.

THIS DATA IS SUBJECT

TO CHANGE

0.7

WITHOUT

NOTICE

[_1

J_t)c

R

BOX

L+__,

I

5

I

+

62

COPPER

_

CONDUCTORS

BL

ONLY

w

+

l

' _°t2_

B+K

SL

FTZ't'iq

---_

+

+L _
BK _ L_

mlvAflsMl

' _
_

' _

.....

--

--

W"

--

--

R

--

-'_)

W2

i

t

P

I

II

.....

2-STAGE
THERMOSTAT
_i

_

N

_
_

_....

_

+ +=

+
+ _

Ip2

I

l

(OPTONAL)
_

I

_--I--_

_ _1
k(_(_

I

W- I
i

Y

BR

R

k

l

l

BK

I,,,,,,._
+--

I

NOTE,

_
_
_

Y!7

1

n
®w2
_

'
I

I

/
I

i

I
L

_t_ _
,

I

115VBOT

r_==

/
_

ACCESSORY

KIT)OR

LP PRESS.

SWITCH

CO:?ING

? ?I??ULATING

PRESSURE

IS NOT INSTALLED.

SPE???+

I

COM

--

--

i

Yb__\

I

I I

+

I

u_

I

III

LINE
VOLTAGE
FACTORY
LINE

VOLTAGE

FIELD

LOW

VOLTAGE

FIELD

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

BLACK
BLUE

.,.
_
BL

BROWN BRI

I

I

+o
5_

"_'vv
\/I
'l>_,J

_

I

PURPLE

P

! ..........................

,

(#m_

rti03_m-)

I+_t
I

__

+_>o
-----_3 PoPwl
c_

om ('3

IB

7I ---o_

,L++:__ ++I o++
+

I

'

+I ,

If_NDUCFR_

_:_

+

:I:

++

+

,_

++
l+

+
illI 0+:+_
m_+_ m

CAPACITOR

THERMOSTAT
2.STAGE_--_"

"++ II

-7 I

EAC_ NO-

ROLLOUT
SWITCH
1 TO 3 IN
SERIES DEPEND
NG ON MODEL

_
_

I

_

SWITCH
,pMnn+,£

PRESSURE

-

I

+

HIGH

'

--

I

II

_I

I

I

I

i

.._

--

I_

'

le_o+_u_

o+

e+ co
I<<

I z
+ _m

I

0

+4"q'q-/'?2_l
s_,,_%+oll

+
+

'.+ll

_+'+:_l
/

9-VH

>x

--

,,/7-"II _
_ +
_ +IJ

II3-DJAJ_K;X+;#gTI
I
I
I

t

_ll

E_

++
_._

(F+,ELD+,-_+_,
I a

SWITCH
++++ ++++++.

I

•

LOW
-_SSOREI"--

. ' "+'+++ +
.............

BSTAOE
PRESSURE
,L-_I

_

_

_

O

....

+o

I
|

"O --+LLJ

I m

[

_

20--

i+

#
T(SOMEMODELS)
Lu_:'+'C/----O'-N
pLTv

i

I

m
m

+_
m -_

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9

I

Replacement

Parts

- *gMPV

Models - *9MPVO5OF12B1, *9MPVO75F12B1, *9MPVIOOJ2OB1 & *9MPV125L2OB1
Replacement

part supplied

will be current

active part. For

3arts

not

listed,

consult

(Natural Gas)
place

of purchase.

*9MPV
Key
No.

Description
Functional

Part
Number

050
F12B

1012850
1012854
1012858
1012862

1

1013762
1013763
1013765
1013767

1

1012478
1012479

1

Mount,Motor kit*

1014822

1

5

Wheel, Blower

1013011
1172129

1

6

Transformer

1012722

1

1

Heat Exchanger,Primary

075
F12B

*9MPV

100
J20B

125
L20B

Key
No.

A

3
4

Ht Exchanger,Secondary

Motor,Blower

1
1

1
1
1

1

1

1

1

1

1

1

1

1

1

1

Control,Fan Timer

1014459

1

1

1

1

9

Switch,Interlock

1171981

1

1

1

1

10

Switch,Pressure

1013166
1013515

Blower,Exhaust

1

1

1014339
1014340

1

1

1

1

1

1

Burner, PilotHSP

1008731

1

1

1

1

14

Igniter/SensorHSP

1009524

1

1

1

1

15

Orifice, Burner#42 Nat.

1011351

2

3

4

5

16

Switch,Limit (Rollout)

1013102

2

2

2

2

17

Burner Assembly

1008723
1008724
1008725
1008726

1

503211

1

1

1

1

1

2

2

Filter,HH 16X25X1/2"

1010365

1

21

Control,Mtr VariableSpd

1013410
1013411
1013412
1013413

1

for bellyband

Bellyband Location
on Motor
Model*9MPV

A(in.)

O5OF12B1

1.38"

O75F12B1

2.O9"

1OOJ12OB1

2.O9"

125L2OB1

2.O9"

440 O1 2020 05

location

1

1

1172008
1172005
1172006
1172007

1

1012972
1012888

1

721020013
721020008

1
2

1

1
1

1
1
1

1

1

1

1

1

1

2

2

2

1013680
1013681
1014494

1

Door,Front (Cmakeronly)
(Cmakeronly)
Croakeronly)
(Hellonly)
(Hellonly)
(Hellonly)
(]-staronly)
(Tstaronly)
(]-staronly)

1014194
1014197
1014200
1014195
1014198
1014201
1014196
1014199
1014202

1

TransitionAssembly

1012281
1012282
1012283

1

Gasket, Exhaust Blower

1014425

1

1

Board,Insulating

1012418
1012419
1012420

1

1

1012244
1012245
1012246

1

1013263
1013080
1013083
1013084

1

1012594
1012595
1012596

1

P

R

on motor

S

T

U

Box,Collector

Gasket,Transition

Gasket, CollectorBox

125
L20B

1

BracketAsy., Door Filler

M

Q

1

1012603
1012604
1012605

100
J20B

1

1

1

20

1

1014227
1014230
1014233
1014236
1014228
1014231
1014234
1014237
1014229
1014232
1014235
1014238

1

Orifice, Pilot.018

1

Door,Blwer (Cmakeronly)
(Cmakeronly)
(Cmakeronly)
(Cmakeronly)
(Hellonly)
(Hellonly)
(Hellonly)
(Hellonly)
(]-staronly)
(]-staronly)
(Tstaronly)
(Tstaronly)

1

19

1012866
1012867
1012868

L

1
1

Panel, Blower Cutoff

075
F12B

Hanger,Blower

1

1320366
34335001
34335002
1008445

Housing,Blower

050
F12B

K

N

1

Partition,Blower

Pan
Number

1012328

1

13

below

J

1

Valve,Gas HSPNat. 2 Stg

*See Table

H

1

12

Switch,Limit(Main)

F

1

1013351

18

Gasket,Top Panel

1

8

11

Panel,Top

1

B
2

Description

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

1
1
1

1

1
1
1
1
1
1
1

1

1
1
1
1
1

1
1
1
1
1
1

[_

[

Replacement

Parts

- *gMPV

Models - *9MPVO5OF12B1, *9MPVO75F12B1, *9MPVIOOJ2OB1 & *9MPV125L2OB1
Replacement

part supplied

will be current

active part. For parts not listed, consult

(Natural Gas)
place of purchase.

*9MPV
Key

W
No.

Description

Gasket, AttachmentPlate

Part

050

078

100

128

Description

Part
Number

1012648
1012651

11 I DoorScrews
)( I Door ScrewGrommets

1014488
1171990

1012653

)(

I Coupling,Air Intake

1002284

1012542
Number
1012544
1012543

)(

I Gasket,Air Intake

1012583

)(

I Clamp,HoseS/8"

1012975

F]!B

FI!B

J!B

LiL_B

Fi B

X

Cover,Junction Box

1012350

1

1

1

1

11 I Coupling,Discharge

1002522

Y

Box,Junction

1012349

1

1

1

1

)(

I ClampHose

1013830

Z

Tube, Pilot

1012832
1013189

1
1

-

)(
)(

I Grommet,Vent
I Bushing,Strain Relief

1012697
1945287

_

-1

)(
)(

II Grommet,Vinyl
Clamp, Hose3/4"(Gas Inlet)

1009535
1012976 ___

1013077
1012545

CC

Bottom,Burner Box

AA
BB

Manifold
Bracket,Pilot

DD

Baffle,Burner Box

EE

Top, Burner Box

1

1012971

)1 I Harness,WireLo Voltage

1012520

1012278
1012279

)1 I Harness,Wire HighVoltage
)( I Trap, DrainTee

1012521
1171916

-

)(

I Tube, Drain 112"ID Drain

1171991

lii
1

i

)(
)l
)(

IIHarness'Wire
Tube, ll2"EIbow
I Coupling, ll2"Barbed

1171992
10136901013689
1171993

i

-1

)(
)(

I Tubing,5/8"1DDrain
I Connector,3/4"X1/2"

1171994
1171995

)(

I Elbow,1/2"

1171996

)(

I Grommet,Casing

1170977

)(

I Tube, Relief Ext.

1009238

1012334
1
1012335
1012336
10129701010901
11

1

1012338
1012339
1012340

1

1

1013702
1013703
1013704

1

li

1

-

;

i

CPVC

street

FF

Bracket,ManifoldSupport

1012377

2

2

2

2

)(

I Connector,ReliefTube

1171998

GG

Bracket,BurnerBox Side

1012532

2

2

2

2

)(

I Plate,Cover

1171999

1012321

1

1

1

1

)(

I Gasket,Cover Plate

1172000

1009238

1

1

1

1

)(

I Cap, DrainTee

1172001

)(

I Clamp,Tee Cap

)(

I Manual,Users

44102201003

)(

I Manual,Installation

44001202004

HH
JJ

Bracket,Control Mounting
Tube, Sensor
Trap, DrainAssembly

1171917

1

LL

Sightglass

1013235
1013236

1
1

1
1

1
1

1
1

741010039

1

1

2

2

Gas Conversion

741020001

1

1

2

2

Nat to LP

*1011789

LP to Nat

*1011787

MM
NN

Wrapper,Filter Rack
Front, FilterRack

1

1

1

OO

Cover,Filter

2791043

1

1

2

2

PP

Clip, Filter

1008482

3

3

3

3

1013701

I

I

I

I

Bracket,Trap

1171986

I

I

I

I

SS

Bracket,Trap Bracket

1171987

I

I

I

I

TT

Tube, Drain Coll. Box 518"ID

1171988

I

I

I

I

UU

Tube, Drain Tee 1/2" ID

1171989

I

I

I

I

Tube, Relief

1009238

I

I

I

I

WW

DrainVent

1014003

I

I

I

I

YY

Tee, Drain

1171915

I

I

I

I

QQ
RR

VV

Gasket, Trap

F i_B I J i_B

L i_ B

-i

i

_

1172002

KK

(Tstaronly)

_]

Key
No,

Kits - All models

* Must be ordered from Service Parts

440 O1 2020 04



---

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Title                           : 
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