ICP C8DNL050B12B1 User Manual 80+ SINGLE STAGE GAS FURNACE Manuals And Guides L0601261

ICP Furnace/Heater, Gas Manual L0601261 ICP Furnace/Heater, Gas Owner's Manual, ICP Furnace/Heater, Gas installation guides

User Manual: ICP C8DNL050B12B1 C8DNL050B12B1 ICP 80+ SINGLE STAGE GAS FURNACE - Manuals and Guides View the owners manual for your ICP 80+ SINGLE STAGE GAS FURNACE #C8DNL050B12B1. Home:Heating & Cooling Parts:Icp Parts:Icp 80+ SINGLE STAGE GAS FURNACE Manual

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80+Single
Stage

DedicatedDownflow
*8DNL

Category
I Furnace
See section

4 for Category

safety

to the potential
Understand

words

hazards,

those

CAUTIONis

highlight
Installing
install,

Untrained

to or shipped

all safety

safety

glasses

These

instructions

tions exceed
require

these

unsafe

practices

in enhanced

personnel.

In the United

gloves.

Lewisburg,

These

injury

that may

words

or death.

result

installation,

in minor

reliability,

can be hazardous

on the furnace

and in instruction

manuals

be alert

are used with the safety-alert

symbol.

DANGER

identifies

the

WARNINGsignifiesahazardthatcouldresultinpersonalinjuryor
personal

injury or product

and property

damage.

NOTE

is used to

or operation.

due to gas and electrical

basic maintenance
When

States,

on heating

safety

precautions

Standard

requirements

functions

working

and other

all safety
of Canada

especially

such

components.

as cleaning

equipment,
that

codes

observe

Only trained

and qualified

personnel

should

to existing

the National

Gas and Propane

during

and replacing
precautions

air filters.

All other

in the literature,

operations

on tags,

must be

and on labels

at-

may apply.

including

Natural

available

and conform

and ordinances,

as a minimum

International

personal

Have fire extinguisher

minimum

local codes

instructions

you see this symbol

equipment.

refer to the National

cover

When

or CAUTION.

in severe

with the furnace

and work

certain

WARNING,

can perform

service

codes.

In Canada,

REQUIREMENTS

symbolZl._.

result

equipment

heating

personnel

by trained

tached

54-2002.

heating

or service

service

performed

DANGER,
that will

that will result

and servicing
repair,

This is the safety-alert

used to identify

suggestions

(C, H, T)

injury.

the signal

most serious
death.

information.

for personal

Brands

I definition.

SAFETY
Recognize

* Denotes

start-up
national

Fuel Gas Code

Installation

and adjustment
standards

Code

(NFGC)

procedures

and safety

those that may not have kept up with changing

ANSI

(NSCNGPIC)

codes.

and service
In some

residential

Z223.1-2002/NFPA

CSA B149.1-05.

Wear

calls.

instances,

construction

these

instruc-

practices.

for a safe installation.

Comfort

Products,

LLC

TN 37097

INSTALLER:
or adjacent

Affix these instructions

to the furnace.

CONSUMER:
Retain these instructions
for future reference.

Table

of Contents

1. Safe Installation Requirements ................
2. Installation
...............................

3
4

3. Combustion

& Ventilation Air

4. Gas Vent Installation

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

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

5. Horizontal Venting .........................

6. Masonry Chimney Venting ...................

7. Gas Supply and Piping .......................
8. Electrical Wiring ...........................
9. Ductwork and Filter .........................
10.Checks and Adjustments.....................
11.Furnace Maintenance........................
12.Sequence of Operation & Diagnostics ...........
TechSupport and Parts .........................

16
18
19
23
27
28
31

CARBON MONOXIDE POISONING AND FIRE
HAZARD.
Failure to follow safety warnings exactly could
result in serious injury, death, and/or property
damage.
This furnace is not designed for use in mobile
homes, trailers or recreational vehicles.
Portions of the textand tablesare reprinted from NFPA 54 / ANSI Z223,1-2002©, with permission of National Fire Protection Association, Quincy, MA 02269 and American Gas Association,
Washington, DC 20001. This reprinted material is not the complete and official position of the NFPA or ANSI, on the referenced subject, which is represented only by the standard in its
entirety.

Printedin
U.S.A.

11/10/2005

441 01 2314 (02)

START-UP
(Keep
Recommended,
Dealer

but

not

this

page

CHECK
for future

SHEET
reference)

required,

Name:

Address:
City,

Business Card Here
Zip or Postal Code:

State(Province),

Phone:
Owner

Name:

Manual Gas Shut-Off Upstream

Address:
City, State(Province),

Zip or Postal

Code:

of Furnace/Drip- Leg?

YES_I

NO_I

Drip-Leg Upstream of Gas Valve?

YES_I

NO_I

Blower Speed Checked?

NO [_I

YES _1

Model Number:

YEs_I

All Electrical Connections Tight?

Serial Number:

Gas Valve turned ON?

YES _1

NO[_I

Blower Motor H. P,:

Measured

When

Firing

Unit:

Supply Voltage:

Calculated

Checks

and

Type of Gas:

Natural:

Limit Opens at...(°F)

LP:

Line Pressure
Firing

Rate:(See

Adjustments

Section).

or(°C).

Limit Closes at,,,(°F)___or(°C)

Measured Manifold Pressure:

Which blower speed tap is used?

Thermostat OK?

YES _1

NOE_

Subbase Level?

YES _1

NOE_I

Anticipator Set?

YES _1

NO E_ Set At?:

(Heating)

NO[31

(Cooling).

Temperature of Supply Air:

(°F)___or(°C)

Temperature of Return Air:

(°F)

Rise (Supply Temp.-Return

Temp.): (°F)

or(°C)__
or(°C)__

Breaker On?

YES _1

NoE_I

Filter Type and Size:
Fan "Time ON" Setting:.
Fan "Time OFF" Setting:

Date of Installation:
Date of Start-Up:

Dealer Comments:

441 01 2314 02

1. Safe Installation

Requirements

FIRE, EXPLOSION, AND ASPHIXIATION

HAZARD

Improper
adjustment,
alteration,
service,
maintanence
or installation
could cause death,
personal injury, 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 havingjurisdiction.
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.

•

This furnace
is NOT approved
homes,
trailers
or recreation

for installation
vehicles.

•

Seal around

air ducts.

•

Install

•

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

abuse
create
A,

Always install furnace to operate within the furnace's
intended temperature-rise
range with a duct system which
has an external static pressure
within the allowable
range,
as specified in" Technical Support Manual"of
these instructions. See furnace rating plate.
When a furnace is installed so
culated by the furnace to areas
the furnace, the return air shall
sealed to the furnace
casing
space containing
the furnace.
A gas-fired

furnace

must be installed
structions.
•

that supply ducts carry air ciroutside the space containing
also be handled by a duct(s)
and terminating
outside the

for installation

as specified

in a residential

in "2. Installation"of

441 01 2314 02

injury and/or
and odorless
or when the

dential 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:

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

To ensure safe and efficient
do the following:

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

operation

of your unit, you should

Do not use this unit if any part has been under water. Immediately call a qualified service agency to inspect the unit and
to replace any part of the control system and any gas control
which has been under water.

garage
these in-

This furnace is not to be used for temporary heating of buildings or structures
under construction.
See "2, Installation,
item 10 "

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

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
Resi-

Use a commer-

cially available soap solution made specifically
for the detection of leaks to check all connections,
as specified in "7. Gas
Supply and Piping, Final Check"of
these instructions.

are pro-

the life of the unit and

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

combustion
and ventilation
air to the furin "3. Combustion
and Ventilation Air" of

Never test for gas leaks with an open flame.

and/or improper
use can shorten
hazards for you, the owner.

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

as speci-

Combustion
products
must be discharged
outdoors.
Connect this furnace to an approved vent system only, as specified in "4. Gas Vent Installation,
5, Horizontal
Venting and 6.
Masonry
Chimney Venting"of
these instructions.

filter type and size.

Your unit is built to provide many years of safe and dependable
service providing
it is properly installed and maintained.
However,

Use onlythe 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.P. gas with approved
kit.)

Provide adequate
nace as specified
these instructions.

and return

Safety Rules

NOTE: This furnace is design-certified by CSA International (formerly AGA and CGA) for installation in the United States and Candada. 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.

correct

supply

in mobile

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.

Frozen Water Pipe Hazard

.your furnace
home

to provide

cold weather

you should

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.

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.
solely

during

Turn off the water supply to the structure

Failure to protect against the risk of freezing could
result in property damage.

is designed

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

If the structure will be unattended
take these
precautions.

WATER DAMAGE TO PROPERTY HAZARD

Your furnace

could

-or-

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.

a safe and comfortable

living environment.
The furnace is NOT designed
to ensure that
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.

-or-

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

2. Installation
Do NOT install furnace directly on carpeting, tile or other combustible material. See 9, Ductwork and Filter Sub-base for
Combustible Floors.

CARBON MONOXIDE POISONING HAZARD.
Failure to properly
vent this furnace or other
appliances could result in death or personal injury.
If this furnace is replacing a previously commonvented furnace, it may be necessary to resize the
existing vent system to prevent oversizing problems for the other remaining appliances(s).
See
Venting and Combustion
Air Check in the 4. Gas
Vent Installation section of this instruction.

Location and Clearances

Maintain clearance
for fire safety and servicing. A front clearance of 24" is minimum for access to the burner, controls and
filter. See clearance
requirements
in Figure
1.

Use a raised

Residential

mensions

based
(Figure

clearance

and furnace

•

Furnace
possible

di-

10. This furnace
•

CARBON MONOXIDE POISONING HAZARD.
exactly

could

Do NOT operate
furnace
in a corrosive
atmosphere
containing
chlorine,
fluorine or any
other damaging chemicals, which could shorten
furnace life.

•

and remedy.

Install

furnace

level.
•

This furnace is NOT to be used for temporary heat of buildings
or structures under construction.

Install furnace as centralized
heat distribution
system.

Install the vent pipes as short as practical.
Installation
section).

as practical

at least

must be located or physically
damage by a vehicle.

protected

18" (457

from

may be used for construction

heat provided

that:

The furnace is permanently
installed with all electrical wiring, piping, venting and ducting installed
according
to
these installation
instructions.
A return air duct is provided,
sealed to the furnace casing, and terminated
outside the
space containing
the furnace.
This prevents a negative
pressure condition as created by the circulating
air blower,
causing a flame rollout and/or drawing combustion
products into the structure.

Clean outside air is provided for combustion.
minimize the corrosive
effects of adhesives,

This is to
sealers and

other construction
materials.
It also prevents the entrainment of drywall dust into combustion
air, which can cause
fouling and plugging of furnace components.

Installation Requirements
1,

installed

The furnace is controlled
by a thermostat.
It may not be
"hot wired" to provide heat continuously
to the structure
without thermostatic
control.

Refer to 3. Combustion
& Ventilation
Air section,
Contaminated
Combustion
Air for combustion
air
evaluation

or wet at times.

require:

If the furnace is to be suspended
from the floorjoists
in a basement or a crawl space or the rafters in an attic, it is necessary to
use steel pipe straps or an angle iron frame to attach the furnace. These straps should be attached to the furnace bottom
side 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.

1).

Failure to follow safety warnings
result in death or personal injury.

installations

Burners and ignition sources
mm) above the floor.

upon the minimum

if the floor is damp

•

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

base
garage

with respect

4. Gas

to the

Vent

of the return air to the furnace is main55 ° F (13 ° C) and 80 ° F (27 ° C), with no

evening setback
or shutdown.
The use of the furnace
while the structure
is under construction
is deemed to be
intermittent
•

(See

The temperature
tained between

operation

The air temperature

per our installation
rise is within

instructions.

the rated

rise range

the furnace rating plate, and the firing rate has been set to
the rating plate value.
441 01 2314 02

The filters used to clean the circulating
air during the
construction
process must be either changed or thoroughly cleaned prior to occupancy.
The furnace,

ductwork

and filters

are cleaned

Verify proper furnace operating
conditions
including ignition, gas input rate, air temperature
rise, and venting according to these installation
instructions.

as neces-

sary to remove drywall dust and construction
debris from
all HVAC system components
after construction
is completed.

Dimensions

and Clearances

(*8DNL)
MINIMUM

281/2

CLEARANCES

MATERIALS

FRONT (combustion air openings
in furnace and structure)

Required For Service

313116

FURNACES

REAR

_-J

TO COMBUSTIBLE

FOR ALL

*24"

ALL SIDES Of SUPPLY PLENUM

SIDES

VENT
Single-Wall
11/16

fl°'T i

213/16

LEFT SIDE

Vent

Type B-1 Double-Wall
TOP OF FURNACE

11/16

Vent

1"
1"

"30" clearancerecommendedfor casing removal.

FRONT

See Section9.DuctworkandFiiter, Sub-basesfor CombustibleFloorsFurnace ONLYand DownflowCoil AdapterBox sectionsof this manual
for installationon combustibleconstruction.

2415/16

181/2

RIGHTSIDE

Drawing is representative,

but some models may vary

24 3/16
165/8

nil 6

DIMENSIONAL
Unit

INFORMATION
Top

Bottom

Capacity

*8DNL050B12
*8DNL075B12

151/2

5
5/16

141/8

191/8

175/8

73/4

1711116

Furnace is designed for top return ONLY.

*8DNLO75F16
*8DNL1OOF14

Return air through back of furnace is NOT
allowed.

8DNL1OOL20
*8DNL125L20

241/2

107116

231/8

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

Cabinet

121/16 _3
3/4

DIMENSIONS

IN INCHES

Dentoes Brand

Downflow

Furnace Installation
Inspect the rating plate to be certain the model number begins
"*8DNL".
This identifies the furnace as a dedicated
downflow

with
fur-

nace that is permitted
Figure 2).
* Denotes
Brand

(see

441 O1 231402

to be Installed

in a Downflow

position.

FIRE HAZARD.
Failure
to install
furnace
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.
[_

The minimum

clearances

maintained
between
shown in Figure 1.

to combustion

the furnace

In addition to clearances
must be considered.

in Figure

A su bbase for combustible
is installed on combustible

construction

and adjacent

MUST

construction,

1, clearance

Typical Downflow

Installation

for the vent pipe
RETURN
AIR

floors MUST be used when the furnace
material.
See "9. DuctworkandFilter't

GAS SUPPLY

SUPPLY
AIR
25-24-38

3. Combustion

& Ventilation

Air
evaluated carefully as it may be necessary to provide outdoor air
for combustion.

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

adequate
result
in

Use
methods
described
combustion
and ventilation

combustion
and
death or personal

here
air.

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
the gas codes, or in the absence of local codes, the applicable
national codes.
Combustion
and ventilation
with one of the following:
1.

air must be supplied

in accordance

Section 8.3, Air for Combustion
and Ventilation,
of the National
Fuel Gas Code, (NFGC), ANSI Z223.1-2002/NFPA
54-2002
in the U.S.,

•

Commercial

•

Buildings

with indoor

buildings.

•

Furnaces

installed

in laundry

•

Furnaces

installed

in hobby

•
•

Furnaces
installed near chemical
storage
Permanent
wave solutions for hair.

•

Chlorinated

•

Chlorine

•

Water

•
•

De-icing
salts or chemicals.
Carbon tetrachloride.

•

Halogen

•

Cleaning

•

Printing

•
•

Hydrochloric
acid.
Sulfuric Acid.

waxes
based

rooms.
or craft rooms.
areas.

and cleaners.

swimming

softening

type

pools.

pool chemicals.

chemicals.

refrigerants.

solvents

(such as perchloroethylene).

inks, paint removers,

•

Solvent

•

Antistatic

cements
fabric

•

Masonry

acid washing

varnishes,

etc.

and glues.
softeners

for clothes

dryers.

materials.

Sections 7.2, 7.3, 7.5, 7.6, 7.7, and 7.8 of National Standard of
Canada, Natural Gas and Propane Installation Code
(NSCNGPIC), CSA B149.1-05 in Canada,

Outdoor Combustion

Applicable

A space having less than 50 cubic feet per 1,000 BTUH input rating
for all gas appliances
installed in the space requires outdoor air for
combustion
and ventilation.

provisions

When the installation

of the local building

is complete,

check

code.

that all appliances

have

adequate
combustion
air and are venting properly. See Venting
And Combustion
Air Check in "4. Gas Vent Installation
"Section in

Air Openings and Connecting

Combustion

Air

Installations
in certain areas or types of structures could cause excessive exposure to contaminated
air having chemicals
or halogens that will result in safety and performance
related problems

Ducts

Total input rating for all gas appliances
in the space MUST
considered
when determining
free area of openings.

Connect

When
MUST

The minimum

this manual.

Contaminated

Air Method

ducts

or openings

screens
are used
be no smaller than
dimension

directly

to the outdoors.

to cover openings,
1/4" mesh.
of air ducts

MUST

the

openings

NOT be less than

3 _ .

and may harm the furnace.
door air for combustion.

These

instances

The following areas or types of structures
posure to the substances
listed below.

must use only out-

may contain or have exThe installation
must be

When sizing a grille, louver, or screen 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.
Screens shall have a mesh size not smaller than 1/4".
441 01 2314 02

air when two permanent
used.

Requirements
1.

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

Figure

3 illustrates

how to provide

Outside

combustion

Air (This

and ventilation

is ONLY

a guide.

Subject

openings,

One opening MUST
the second opening
ceiling.

Size openings

to codes

commence
within 12" of the floor and
MUST commence
within 12" of the

and ducts

of country

one inlet and one outlet, are

per Table

having

jurisdiction.)

ThisinstallationNOTapprovedin Canada
/
• GableVent)

GasVent

Gas Vent

.,1'

j_Gable

Vent

Ventilated
Attic'S.

SoffitVent

J_utlet
II

I
Air (1)

Outle_
Air(1) [_

" _G%
_

F......

Air(1)
_.

---

SoffitVent
Inlet
Air (2)

;pace

Inlet
Air(1)

I I,n,e
`
_ '_

Air (2)

MinimumOne Inlet and OneOutlet Air Supply is Required
May be in andCombination Shown
Inlet Air Opening Must beWithin12"(300mm)of floor
Outlet Air OpeningMust be Within12"(300mm)of ceiling
(1) 1 Square Inch (6cm2) per 4000 BTUH
(2) 1 Square Inch (6cmz) per 2000 BTUH

Horizontal duct openings require I square inch of free area
per 2,000 BTUH (1,100 mmZ/kW) of combined
input for all
gas appliances
in the space (see Table 1).

nicate with the outdoors

horizontal
duct to the outdoors or spaces
communicate
with the outdoors.

(crawl or attic) that freely

Vertical duct openings or openings directlycommunicating
with the outdoors
require 1 square inch of free area per
4,000 BTUH (550 mm2/kW) for combined
input of all gas
appliances
in the space (see Table 1).

Air shall have:

When one permanent
requires:
a.

1 sq. in of free area
combined
input
Table 1) and

outdoor

opening

per 3,000

is used, the opening

BTUH

of all gas appliances

not less than the sum of the areas

(700 mm2/kW)
in the space

for

Combination

Indoor openings that comply with the Indoor
tion Air Method below and

Outdoor
openings
located as required
Combustion
Air Method above and

Outdoor openings sized as follows.

in the

CombusOutdoor

2) Outdoor opening size reduction Factor is 1 minus the
Ratio in 1) above.
3) Minimum size of Outdoor openings shall be the size required in Outdoor Combustion
Air Method above multiplied by reduction Factor.

commu-

Area
BTUH
Input
Rating

TwoHorizontalDucts
(sq. in./2,000BTUH)

MinimumFree Area Requiredfor EachOpeningor Ductto Outdoors
TwoVertical Ductsor
SingleOpening
Openings
(sq. in./3,000BTUH)
(sq.in./4,000 BTUH)

Round Duct
(sq. in./4,000
BTUH)

50,000

25 sq. in.

16.7 sq. in,

12.5 sq. in,

75,000

37,5 sq. in.

25 sq. in.

1825 sq. in.

100,000

50 sq, in.

33.3 sq. in,

25 sq. in.

125,000

62.50sq. in.

41.7 sq. in.

31.25 sq. in.

150,000

75 sq. in.

50 sq. in.

37.5 sq. in.

EXAMPLE:

Determining

Furnace
100,000

Furnace
100,000
441 01 231402

1) Calculate the Ratio of all Indoor Space volume divided
by required volume for Indoor Combustion
Air Method.

The opening shall commence
within 12" of the top of the enclosure. Appliances
shall have clearances of at least I "from the sides
shall directly

and Outdoor

a vertical

(see

of all vent connectors

The opening

of Indoor

through

the space.

and back and 6" from the front.

or shall communicate

Free Area
Water Heater

Total Input

30,000

(130,000 + 4,000)

Water Heater

Total Input

30,000

(130,000 + 2,000)

32.5 Sq. In. Vertical
65 Sq. In. Horizontal

Indoor Combustion Air

Standard and Known-Air-Infiltration
© NFPA& AGA

Rate Methods

Indoor air is permitted for combustion
and ventilation,
if the Standard or Known-Air-Infiltration
Rate Method is used.

CARBON MONOXIDE POISONING HAZARD.

The Standard

Failure to supply
adequate
combustion
result in death or personal
injury.

ume than 50 cubic feet per 1,000 BTUH input rating for all gas appliances installed
in the space.
The standard
method
permits
indoor air to be used for combustion
and ventilation
air.

air could

Most
homes
will
require
additional
air from
outdoors
for combustion
and ventilation.
A space
with at least 50 cubic feet per 1,000 BTUH input
rating or homes with tight construction
may need
outdoor air, supplied
through
ducts, to supplement
air
infiltration
for
proper
combustion
and
ventilation
of flue gases.

The Known

Method

Air

may be used, if the space

Infiltration

shall be used if the in-

greater than 0.60 ACH shall not be used. The
volume of the space varies with the number of
determined
per Table 2 or Equations
1 and
minimum
required volume for each appliance

iiiiiiiiiiiiiiiiiiiii_i;_;:_i:_i:_i:_i:_i:_i:_i:_i:_i:_i:_i:_i:_i:_i:_:i_!!!!_ii!#_;i!_#_;i!i!;i_iiiii_ii_iiiiiiiiiii;i#;ii;ii;ii;ii;ii;i
MINIMUM SPACE VOLUME FOR 100% COMBUSTION
AND VENTILATION

minimum
required
ACH and shall be
2. Determine
the
in the space, and

to get the total minimum

AIR FROM INDOORS

required

vol-

(ft 3)

Fan- assistedTotal
(1,000'sBtuh)

Total

(1,OOO'sBtuh)

Method

filtration rate is known to be less than 0.40 air changes
per hour
(ACH) and equal to or greater than 0.10 ACH.
Infiltration
rates

add the volumes together
ume for the space.

Other Than Fan-Assisted

Rate

has no less vol-

100

0.60

1,050

1,400

1,750

1250

1,875

2,500

3,125

3,750

0.50

1,260

1,680

2,100

1,500

2,250

3,000

3,750

4,500

0.40

1,575

2,100

2,625

1,875

2,813

3,750

4,688

5,625

0.30

2,100

2,800

3,500

2,500

3,750

5,000

6250

7,500

0.20

3,150

4200

5,250

3,750

5,625

7,500

9,375

11,250

0.10

6,300

8,400

10,500

7,500

11,250

15,000

18,750

22,500

0.00

ACH

125

150

NP = Not Permitted
Table 2 Minimum Space Volumes were determined by using the
following equations from the National Fuel Gas Code ANSI
Z223.1/NFPA 54-2002, 8.3.3.2:
1.
For other
hood-equipped

than fan-assisted
water heater,

Volume

other

21 ft 3
ACH

For fan-assisted

Volume

fan =

(

appliances
15ft3
ACH

(

appliances

! other
1000 Btu / hr

such

An attic or crawl space may be considered
a space that freely
communicates
with the outdoors 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 I square inch
of free area per 4,000 BTUH of total input rating for all gas appliances in the space.

as a draft

)
In spaces that use the Indoor
Combustion
Air Method, infiltration should 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 Outdoor
Combustion
Air Method:

such as this furnace,
Iran
1000 Btu ! hr

)

Unusually

•

If:
[ other

input of all fan-assisted

appliances

= air changes

per hour

The following
requirements
the Known
Air Infiltration

(ACH shall

apply to the Standard
Rate Method.

Method

0.60.)
and to

•

Adjoining
rooms can be considered
part of a space,
are no closable doors between
rooms.

•

Combining
spaces on the same floor level.
Each opening
shall have a free area of at least 1 square inch/1,000
BTUH
(2,000 mm2/kW)
of the total input rating of all gas appliances
in the space, but not less than 100 square inch (0.06 m2).
Once opening
shall commence
within 12" (300 mm) of the
ceiling and the second opening shall commence
within 12"
(300 mm) of the floor. The minimum
ings shall be at least 3 in. (80 mm).

dimension

if there

of air open-

with:

Doors

in Btu/hr

not exceed

as Construction

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

3.
ACH

is defined

combined input of all other than fan-assisted
appliances in Btu/hr

[ ran = combined

tight construction

and openable

windows

are weather

stripped

and

Other openings
are caulked
or sealed.
These
include
joints
around
window
and door frames,
between
sole
plates and floors, between
wall-ceiling
joints,
between
wall panels, at penetrations
for plumbing,
electrical
and
gas lines, etc.

Ventilation Air
Some provincial codes and local municipalities
or make-up
air be brought into the conditioned

require ventilation
space as replace-

ment air. Whichever
method is used, the mixed return air temperature across
the heat exchanger
MUST
not fall below
60 °
continuously,
or 55 ° on an intermittent
basis so that flue gases will
not condense
excessively
in the heat exchanger.
Excessive condensation
will shorten the life of the heat exchanger
and possibly
void your warranty.
441 O1 2314 02

4. Gas Vent Installation
•

CARBON MONOXIDE POISONING,
to

death,
Read

properly

FIRE AND

Push

personal
and

vent
injury
all

this

furnace

and/or
instructions

could

property

of Canada

Natural

Gas and

result

section.

Install the vent in compliance
with codes of the country havingjurisdiction,
local codes or ordinances and these instructions.

This Category ] furnace is fan-assisted. A fan assisted appliance
is an appliance equipped with an integral mechanical means to either draw or force products of combustion through the heat exchanger.
Category ] furnace definition: A central furnace which operates
with a non-positive vent static pressure and with a flue loss not
less than 17 percent. These furnaces are approved for commonventing and multi-story venting with other fan-assisted or draft
hood-equipped
appliances in accordance with the NFGC or
NSCNGPIC.

the vent connector

onto

the furnace

Pro-

B149.1-05
in Canada.

flue collar

of the

venter assembly until it touches the bead (at least 5/8" overlap)
and fasten with at least two field-supplied,
corrosion-resistant, sheet metal screws located at least 140 ° apart.

damage.

in this

Standard

pane Installation
Code (NSCNGPIC)
CSA
section 7 and appendix
C venting requirements

EXPLOSION HAZARD.
Failure

the National

Keep vertical Category
[ vent pipe or vent connector
short and direct as possible.

runs as

Vertical outdoor runs of Type-B or ANY single wall vent pipe
below the roof line are NOT permitted.

Slope all horizontal runs up from furnace to the vent terminal a
minimum of 1/4" per foot (21 ram/m).

Rigidly support all horizontal
portions of the venting system every 6' or less using proper clamps and metal straps to prevent
sagging and ensure there is no movement
after installation.

Check existing gas vent or chimney to ensure they meet clearances and local codes. See Figure 1

10. The furnace

Category [ Safe Venting Requirements
Category
[ furnace vent installations
shall be in accordance
Parts 10 and 13 of the National
Fuel Gas Code (NFGC),
Z223.1-2002/N
FPA 54-2002;
the CSA B149.1-05,
National
and Propane Installation
and vent manufacturer's

and/or Section 7 and Appendix
Standard
of Canada,
Natural

Code; the local building
instructions.

codes;

with
ANSI
C of
Gas

furnace

NOTE: The following instructions
comply with the ANSI
Z223.1/NFPA 54 National Fuel Gas Code and CSA B149.1 Natural Gas and Propane Installation code, based on the input rate on
the furnace rating plate.
If a Category ] vent passes through an attic, any concealed
space or floor, use ONLY Type B or Type L double wall vent
pipe. If vent pipe passes through interior wall, use Type B vent
pipe with ventilated thimble ONLY.

Do NOT vent furnace into any chimney serving an open fireplace or solid fuel burning appliance.

Use the same
mitted by:

•

diameter

Category

] connector

or pipe as per-

the National
Fuel Gas Code Code (NFGC) ANSI
Z223.1-2002 / N FPA 54-2002 sections 10 and 13 venting
requirements in the United States
or

441 01 2314 02

MUST be connected
to a factory built chimney or
vent complying
with a recognized
standard,
or a masonry or
concrete chimney lined with a lining material acceptable
to the
authority
having jurisdiction.
Venting
into an unlined
masonry chimney
or concrete
chimney
is prohibited.
See the
6. Masonry
Chimney
Venting
section
in these instructions.

11. Fan-assisted
not be vented

combustion
system Category
into single-wall
metal vents.

[ furnaces

shall

12. Category
[ furnaces must be vented vertically
or nearly
cally, unless equipped
with a listed mechanical
venter.

verti-

13. Vent connectors
serving Category I furnaces shall not be connected into any portion of mechanical
draft systems operating
under positive pressure.
A 4-to-3

inch reducer

is permitted

at the flue collar when

installing

a 50,000 Btuh gas input furnace, if the installation
meets all the following requirements
for sizing the vent connectors
and vents:

The
National
Fuel
Gas
Code,
ANSI
Z223.1/NFPA-54-2002,
sections 10.5.3.1(1),
10.6.3.1(2), 10.10.3.1, 13.1.2, 13.1.10, and 13.2.21(1)
through (3) in the U.S. or

The Natural Gas and Propane Installation Code CSA
B149.1-05, sections 7.13.1 (b), 7.13.2(b), 7.18.5(b), and
Appendix C-GVR no. 2. in Canada.

Venting and Combustion Air Check
NOTE:
placed,

When an existing
the original venting

erly vent
adequate
LOWING

the attached
combustion
CHECK.

Vent Check

Category
I furnace is removed
or resystem may no longer be sized to prop-

appliances,
and to make sure there is
air for all appliances,
MAKE THE FOL-

VentPipe

Draft Hood

Typical Gas
Water Heater

!
CARBON MONOXIDE

POISONING HAZARD

Failure
to follow
the steps
outlined
below
for each
appliance
connected
to the venting
system
being placed
into
operation,
could
poisoning
or death:

result

The following
steps shall be followed
connected
to the venting
system
operation,
while all other appliances
venting
1 .Seal

system

are not

any unused

carbon

for each appliance
being
placed
into
connected
to the

in the venting

system.

is no blockage or restriction,
leakage, corrosion and
deficiencies
which could cause an unsafe condition.

3.As far as practical, close all building doors and windows and
all doors between
the space in which the appliance(s)
connected
to the venting system are located and other
spaces of the building.
4.Close

fireplace

dampers.

5.Turn on clothes dryers and any appliance
not connected
the venting system.
Turn on any exhaust fans, such

to
as

range hoods and bathroom exhausts, sothey are operating
at maximum speed. Do not operate a summer exhaust fan.
6.Follow the lighting instructions.
Place the appliance
inspected
into operation.
Adjust
the thermostat
appliance
is operating
continuously.

being
so

7.Test for spillage from draft hood equipped appliances
at the
draft hood relief opening after 5 minutes of main burner
operation.
Use the flame of a match or candle. (Figure 4)
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
Code.

CSA B149, 1, Natural

Gas and Propane

draft

hoo_,

this indicates

Venting to Existing Masonry Chimney
Dedicated
venting
of one fan assisted
sonry chimney
is restricted.
A chimney

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 B 149. 1, Natural Gas a nd Propane
Installation
Code and these instructions.
Determine
that
there
other

NOTE: If Elaine p_ulls towards
sufficient
infiltration air.

monoxide

in operation:

openings

Installation

furnace
into any mamust first be lined with

either Type B vent sized in accordance
with NFGC tables 13.1 or
13.2 or a listed metal lining system, sized in accordance
with the
NFGC section 13.1.7 for a single appliance
or 13.2.19 for multiple
appliances,
or NSCNGPIC
Appendix C, section 10. (See Section 6
Masonry

Chimney

Venting

of these

instructions.)

Listed, corrugated
metallic
chimney
liner systems
in masonry
chimneys
shall be sized in the U.S. by using NFGC tables per
13.1.7 for dedicated
venting and per 13.2.19 for common venting
with the maximum capacity reduced by 20% (0.80 X maximum capacity) and the minimum capacity as shown in the applicable table.
Corrugated
metal vent systems installed with bends or offsets require additional
reduction of 5% of the vent capacity for each bend
up to 45 ° and 10% of the vent capacity for each bend from 45 ° up to
90 °. In Canada,
use the NSCNGPIC.

NOTE:

Two(2)

45 ° elbows

are equivalent

to one

(1) 90 ° elbow.

Combined Venting into a Masonry Chimney
Venting into a masonry or concrete chimney is only permitted
as outlined in the NFGC or NSCNGPIC
venting tables. Follow
all safe venting requirements.

Note:

See section

"6. Masonry

Chimney

Venting'.

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

441 01 2314 02

5. Horizontal

Venting
Vent Termination

Category I Furnaces With External Power
Venters
In order to maintain a Category
naces when vented horizontally
venter

is REQUIRED

] classification
with sidewall

to maintain

a negative

Venting Through a Non-Combustible
Combustible Wall

of fan-assisted
furtermination,
a power
pressure

in the vent-

ing system.

In the U.S.: Per the NFGC, a listed power venter may be used,
when approved by the authority having jurisdiction.

In Canada:
manufacturer

Only power venters
approved
by the appliance
and where allowed by the authority having jurisdic-

tion may be used.

Consult

consult

for power

the Fields

venters

441 01 2314 02

certified

Controls

Co. or Tjernlund

for use with this furnaces.

Products,

Inc.

Power

Venter

manufacturer

instructions.

Select the power venter to match the Btuh input of the furnace being vented.
Follow all of the power venter manufacturer's
installation requirements
included with the power venter for:
•

venting

•

vent terminal

•

preventing

•

protecting

•

see Figure

NOTE:
Please

External

and

installation,
location,
blockage
building

by snow,
materials

5 for required

It is the responsibility

from degradation

by flue gases,

vent termination.
of the installer

to properly

terminate

the vent and provide adequate
shielding. This is essential in order
to avoid water/ice
damage to building, shrubs and walkways.

iiiiiiiiiiiiiiiiii;ii_;;_i:_i:_i;!;!:;!_i_ii!_!ii_i:_:i::_;_i_!_!_i!ii!ii!ii!ii!ii!ii!ii!ii!ii!ii!ii!_i!;iiiiiiiii_iiiiiiiiiiiiiiiiiiiiiii_!!!;!_i
¸ii;ilililiiiiiiiiiiiiiiiiiiiiiiii_i_i_ii!!!iiiii
Other than Direct Vent Termination
Clearance

(_ AIR SUPPLYINLET

VENT TERMINAL

Item

AREA WHERE TERMINAL

IS NOT PERMITED

Canadian Installation(1)

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

U.S. Installation

12" (30cm)#

12" (30 cm)

6" (lfi cm) for appliances_<10,000 BTUH (3kW), 12" (30
cm) for appliances> 10,000 Btub (3 kW) and _<100,000Btub
(30 kW), 36" (01 cm) for appliances> 100,000Btuh (30kW)

above lhe opening.

(2)

anticipated snow level
B

Clearance to a window or door that may be opened

Clearance to a permanently

Vertical clearance to a ventilated soffit located above the

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

closed window

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

Clearance to an unventilated

Clearance to an outside corner

Clearance to an inside corner

Clearance to each side of the centefline extended above

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

3' (91 cm)

electrical meter or gas service regulator assembly

assembly

Clearance to service regulator vent outlet

3' (01 cm)

Clearance to non-mechanical

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

the combustion

soffit

air supply inlet to building or

air inlet to any other appliance

(30 kW), 36"

Clearanceto a mechanicalair supplyinlet

6' (1.83 m)

Clearanceunder a veranda, porch,deck, or balcony

12" (30 cm) +

Clearance to each side of the centefline extended above or

(01 cm) for appliances

4' (1.2

within

m) below

15'

(4.5

m) above

or to the

side

if within

10'

the meter/regulator

of opening:

(30 cm)

above

opening.

> 100,000 Btuh (30 kW)
3' (91 cm)

above

(3m)

horizontally

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

Clearance from a plumbing vent stack

3' (01cm)

Clearanceabove a paved sidewalkor paved drivewaylocated
on publicproperty.

7' (2.13m)

(1.)

In accordance

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

(2,)

In accordance

with the currem 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.

fi4, National Fuel Gas Code

For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B140.1, clearances shall be in accordance
installation instructions.

with local installation codes and the requiremenls

of the gas supplier and the manufacture's

A vent shall nol terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
Notes:
1,

The vent for this appliance shall not terminate
a. Over public walkways; or
b.

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

Where condensate

When locating vent terminations,
Recirculafion

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

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

can cause poor combustion,

relief valves, or other equipment.

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

inlet condensate

problems, and accelerated

of the combusfiob

products of adjacent vents.

corrosion of the heat exchangers.

441 01 2314 02

6. Masonry

Chimney

Venting

Chimney Inspection
All masonry
chimney
construction
must conform
to Standard
ANSI/NFPA
211-2003
and to any state or local codes applicable.
The chimney must be in good condition
and a complete
chimney
inspection must be conducted
prior to furnace installation.
If the inspection
reveals damage or abnormal
conditions,
make necessary repairs or seek expert help. See "The Chimney
Inspection
Chart" Figure 6. Measure inside area of tile-liner
and exact height
of chimney from the top of the chimney to the highest appliance
flue collar or drafthood
outlet.

Connector Type
To reduce
lems,

flue gas heat loss and the chance

the vent connector

of condensate

must be double-wall

Type

masonry

to the outdoors
Chimneys
shall

below the roof line, relining might be required.
conform
to the Standard
for Chimneys,
Fire-

chimney

places, Vents, and Solid Fuel
211-2003
in the United States
Building
Code

Code

in Canada

of Canada)

is being used and it is exposed

Burning Appliances
and to a Provincial

(in its absence,

and must be in good

the

ANSI/NFPA
or Territorial

National

Building

condition.

U.S.A.- Refer to Sections 13.1.9 or 13.2.20 of the N FGC or the authority having jurisdiction to determine whether relining is required.
If relining is required, use a properly sized listed metal liner,
Type-B vent, or a listed alternative venting design.

prob-

B vent.
This model (*8DNL)
kits. A multi-position

Venting Restrictions for Chimney Types
Interior
Chimney
- has no sides exposed to the outdoors
below
the roofline. All installations
can be single furnace
or common
vented with another draft hood equipped
Category
] appliance.
Exterior
Chimney
- has one or more sides exposed
to the outdoors below the roof line. All installations
with a 99% Winter Design Temperature*
below 17°F must be common
a draft hood equipped
Category
I appliance.

Ifa claytile-lined

vented

only with

The 99%Winter DesignDry- Bulb(db)temperatures
arefoundinthe1993ASHRAE
FundamentalsHandbook,Chapter24, Table1 (UnitedStates) and 2 (Canada),or
usethe 99.6%heatingdbtemperaturesfound inthe1997or 2001ASHRAEFundamentalsHandbook,ClimaticDesign Informationchapter,Table1A (UnitedStates)
and 2A (Canada).

for use with
NAHAOO2DH

is NOT listed for use with Chimney Adapter
furnace in the downflow position that is listed

one of the Chimney
Adapter
may be used with a masonry

Kits NAHAOOIDH
chimney.

Canada (and U.S.A.)-This
furnace is permitted to be vented into a
clay tile-lined
masonry chimney
that is exposed to the outdoors
below

the roof line,

provided:

Vent connector is Type-B double-wall,

This furnace is common vented with at least 1 draft hoodequipped

appliance,

and

The combined appliance input rating is less than the maximum capacity given in Table A, and

CARBON MONOXIDE POISONING,
EXPLOSION HAZARD.

FIRE AND

The input rating of each space-heating
appliance is greater
than the minimum
input rating given in Table B for Masonry
Chimneys
for the local 99% Winter Design Temperature.
Chimneys
having internal areas greater than 38 square
inches require furnace input ratings greater than the input
ratings of these furnaces.
See footnote at bottom of Table B,
and

Failure to properly vent this furnace could result in
death, personal injury and/or property damage.
These furnaces are CSA (formerly AGA and CGA
design-certified
for
venting
into exterior
clm
tile-lined masonry chimneys with a factory accesso
ry Chimney Adapter Kit. Refer to the furnace rating
31atefor correct kit usage. The Chimney Adapter Kits
are for use with ONLY furnaces having a Chimne_
Adapter Kit number marked on the furnace ratin i
plate.

441 01 2314 02

The authority having jurisdiction

If all of these conditions
sign shall be used,
Type-B vent.

cannot

approves.

be met, an alternative

such as a listed

chimney-lining

venting
system,

deor a

Exterior

Masonry

FAN+NAT
Type-B

Installations

Double-Wall

Inspections

Chimney,

Vent

with
Connectors
© NFPA& AGA

If the inspection

INTERNAL

AREA OF CHIMNEY
(SQ IN.)

(FT)

119

178

257

130

193

279

138

207

299

152

233

334

250

368

404

Table BMinimum Allowable Input Rating of
Space-Heating
Appliance in
Thousands of Btu per Hr
VENT
HEIGHT

(FT)

INTERNAL
12

Local 99% Winter Design Temperature:

used tile-lined

chimney:

Indicates the chimney exceeds the maximum
permissible
size in the tables, the chimney should be rebuilt or relined to
conform
to the requirements
of the equipment
being
installed and the authority having jurisdiction.

A chimney without a clay tile liner, which is otherwise
in good condition, shall be rebuilt to conform to AN SI/N FPA 211 or be lined with
a UL listed (ULC listed in Canada)
vent. Relining with a listed metal
ered to be a vent-in-a-chase.

metal liner or UL listed Type-B
liner or Type-B vent is consid-

If a metal liner or Type-B vent is used to line a chimney, no other
appliance
shall be vented into the annular
space between
the
and the metal liner.

APPLIANCE

APPLICATION

REQUIREMENTS

Appliance
operation
has a significant
impact on the performance
of the venting system.
If the appliances
are sized, installed, adjusted, and operated properly, the venting system and/or the appliances should not suffer from condensation
and corrosion.
The
38

venting system
with applicable

and all appliances
shall be installed
listings, standards,
and codes.

in accordance

17 to 26 ° F*
The furnace should be sized to provide 100 percent of the design
heating load requirement
plus any margin that occurs because of
furnace model size capacity increments.
Heating load estimates

141

111

154

125

169

167

212

258

362

approved
engineering
methods.
Excessive
oversizing
of the furnace could cause the furnace and/or vent to fail prematurely.
When a metal vent or metal liner is used, the vent or liner must be in

Temperature:

5 to 16° F*

Design

121

166

135

182

111

149

198

193

247

293

377

of a previously

Local 99% Winter

will deter-

Shows signs of vent gas condensation,
the chimney should
be relined in accordance
with local codes and the authority
having jurisdiction.
The chimney should be relined with a
listed metal liner or Type-B vent to reduce condensation.
If
a condensate
drain is required
by local code, refer to the
NEGC, Section 10.9 for additional
information
on condensate drains.

chimney

AREA OF CHIMNEY
(SQ IN.)

the sale a nd at the time of installation

Table ACombined Appliance
Maximum Input Rating in
Thousands of Btu per Hr
VENT
HEIGHT

before

mine the acceptability
of the chimney or the need for repair and/or
(re)lining.
Refer to the Chimney
Inspection
Chart to perform a
chimney inspection.

Local 99% Winter Design Temperature:

can be made using approved
methods available
from Air Conditioning Contractors
of America
(Manual J); American
Society of
Heating, Refrigerating,
and Air-Conditioning
Engineers;
or other

good condition
manufacturer's

145

196

159

213

175

231

283

333

in accordance

To prevent condensation
in the furnace
lowing precautions
must be observed:
1.

-10 to 4° F*

and be installed
instructions.

with the vent or liner

and vent system,

the fol-

The return-air
temperature
must be at least 60°F db except
for brief periods of time during warm-up
from setback at no
lower than 55°F db or during initial start-up from a standby
condition.
Adjust the gas input rate per the
Low gas input rate causes low vent
ing condensation
and corrosion
in
ing system.
Derating
is permitted
2000'.

installation
instructions.
gas temperatures,
ca usthe furnace and/or ventonly for altitudes
above

-11 ° F
or
lower

Local 99% Winter

Design Temperature:
lower*

Not recommended

Adjust the air temperature
rise to the midpoint
of the rise
range or slightly a hove. Low air temperature
rise ca n ca use
low vent gas temperature
and potential
for condensation
problems.

Set the thermostat
short cycling.

-11 ° F or

for any vent configuration

The 99% Winter Design Dry-Bulb (db) temperatures are found in the
1993 ASHRAE Fundamentals
Handbook, Chapter 24, Table 1
(United States) and 2 (Canada), or use the 99.6% beating db temperatures found in the 1997 or 2001 ASHRAE Fundamentals Handbook,
Climatic Design Information chapter, Table 1A (United States) and 2A
(Canada).

heat anticipator

or cycle

rate to reduce

Air for combustion
must not be contaminated
by halogen compounds which include chlorides, fluorides,
bromides, and iodides.
These compounds
are found in many common
home products
such as detergent,
paint, glue, aerosol spray, bleach, cleaning solvent, salt, and air freshener,
and can cause corrosion
of furnaces
and vents.

Avoid

using such products

in the combustion-air

sup-

441 01 2314 02

ply.

Furnace

the furnace
ture failure

use during

construction

to be exposed
of the furnace

Vent dampers

of the building

could

cause

can cause

to halogen compounds,
causing premaor venting system due to corrosion.

on any appliance

connected

to the common

condensation

not use vent dampers
Race.

and corrosion
on appliances

in the venting

common

vented

system.

vent

CHIMNEY INSPECTION CHART

Foradditionalrequirementsreferto the NationalFuelGas CodeNFPA54/ANSIZ223.1-2002 andANSIINFPA211-2003Chimneys,Fireplaces, Vents,and Solid Fuel BurningAppliancesin the U.S.A. or to the Canadian InstallationCode CSAB149.1-05 in Canada.

condition:

Rebuild

Missing mortar

crown

or brick?

I
,_ withclay tile

Yes

Reline

lineror top seal
orreline chimnei'as
_

liner and top
seal in good

IRepair

metalvent, fuel oil
residue?

Mortar or

Remove mortar

file debris?

and tile debris?

Remove metal vent or liner.

_,,_stile

n_isalignrnent,

Yes

ing sections,

adapter venting
-

Condensate
drainage atbottom

/,sObi e,

_:_r

ofchimney?

Chimney

be,owroof,ine?

Yes

[

/
/

441 01 2314 02

_
_

U_nUalUe'_u;nace./

IsChimnevto

Suitable

vo_[ _
'_[
InstallchimneyI
I
adaprerper I
II _

_
_.3,_

" tab,iy

._
/

application/

_'-]Vl

TvDe-Bven_/
"'
/
_.
/
T.T v^_

Not Suitable

instructions for

' _

j_rT-"_,
[

S_le

adapter venting

instal]ation
instructions.

/
Consul__
/PartCofchimney_

t,,_J_
_2_uT

Linechim !ywitbpropedy
sized,listedflexiblemetal
linerorType-BventperNFGCor
NSCNGPIC
VentSizingTables
andlinerorventmanufacturer's
Not Suitable

,nstructionsfor

apl_!ica!
i°n /
_,uitability/

with this fur-

_'
I installchimney

7. Gas Supply

and Piping
Typical Gas Piping ('8DNL)

CARBON
MONOXIDE
EXPLOSION HAZARD.

POISONING,

FIRE

AND

Failure to follow safety warnings exactly 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.

Listed Flexible
Gas Appliance
Connector if
11o4
IO]

Se_c%

Gas Supply Requirements

union

•

Use only the Type of gas approved
plate for approved
gas type.

for this furnace.

See rating

•

Gas input must not exceed the rated input shown on the rating
plate. Overfiring
will result in failure of heat exchanger
and
cause dangerous
operation.

Drip leg &
pipe cap _.

\
Gas control
valve

Do not allow minimum supply pressure to vary downward.
Doing so will decrease
input to furnace.
Refer to Table 3 for gas
supply. Refer to Table 5 or Table 6 for manifold
pressures.

Elbows &
short nipples

Pressures

25-25-17

Use black iron or steel pipe and fittings
by local code.

Use pipe thread
gases.

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

NOTE: The gas supply line must be installed bya qualified service
technician
in accordance
with all building codes.

Provide a 118" NPT plugged tapping for test gauge
immediately
up stream of gas supply connection

NOTE:

Use two pipe wrenches
gas valve from turning.

Gas Type

Supply

Pressure

Recommended
Natural
Propane

7"
11"

Max.

Min,

14"

4,5"

14"

11"

Gas Piping Requirements

In the state

of Massachusetts.

Gas supply connections MUST be performed
censed plumber or gas fitter).

by a li-

When flexible connectors
are used, the maximum
shall not exceed 36" (915 ram).

length

When lever handle type manual equipment
are used, they shall be T-handle
valves.

valves

The use of copper tubing for gas piping is NOT approved.

shutoff

Install gas piping in accordance
with local codes, or in the absence of local codes, the applicable
national codes.
It is recommended
that a manual equipment
shutoff valve be
installed in the gas supply line outside the furnace.
Locate
valve as close to the furnace as possible where it is readily accessible.
Refer to Figure 7.

compound

which

when

or other

is resistant

making

pipe approved

to natural

and LP

connection
to furnace.

connections

to prevent

NOTE: If local codes allow the use of a flexible gas appliance connector, always use a new listed connector.
Do not use a connector
which has previously
served another gas appliance.
8.

Flexible corrugated
metal gas connector may NOT be used inside the furnace or be secured or supported
by the furnace or
ductwork.

Properly size gas pipe to handle combined
appliance
load or
run gas pipe directly from gas meter or LP gas regulator.

10. Install

correct

pipe size for run length

11. Measure pipe length from gas meter
lator to determine
gas pipe size.

and furnace

or LP second

rating.
stage regu-

Left Side Gas Supply Piping
Gas line can be installed
provided in the left side

directly to the gas valve through
of the cabinet. See Figure 7

the hole

Right Side Gas Supply Piping
FIRE HAZARD
Failure to follow safety warnings
exactly could
result in death, personal injury and/or property
damage.
Use wrench to hold furnace gas control valve when
turning elbows and gas line to prevent damage to the
gas control valve and furnace.

Two(2)

90 ° street

two(2)

Figure

nipples

or two(2)

are required

90 ° standard

for right

elbows

and

side gas supply.

See

Piping with Street Elbows
1.

Assemble

the elbows

so that the outlet of one(l)

elbow

is 90 °

from the inlet of the other. The elbows should be tight enough
to be leak proof. An additional
1/4 turn will be required at the
end of step

elbows

2, see Figure

8.
441 01 2314 02

Screw

elbow

assembly

into gas valve

far enough

to be leak

proof. Position el bow assembly so that the inlet of the el bow is
at the bottom of the gas valve. An additional
1/2 turn will be required in step 3. Turn open end of inlet elbow to face the right
side of the furnace (1/4 turn), see Figure 9.
3.

Turn assembly

an additional

1/2 turn to position

top of the gas valve and in line with gas opening
furnace, see Figure 7 and Figure 10.
iiiiiiiiiiiiiiiiiiiiiiii
i:iiiiiii;;;i
_i¸!!iii!ilil
!!!!!!!i
!!!iiiii¸;I i!iliiii¸i¸Ii;¸

FIRE OR EXPLOSION HAZARD.
Failure to properly install metal gas connector could
result in death, personal injury and/or property
damage.

inlet near the
on right side of

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.

E,bows
*aDNL

Black iron pipe shall be installed
at the furnace
gas
control
valve and extend a minimum
of 2" outside
furnace.

Additional LP Piping Requirements
•

Have a licensed
tank and check

•

If copper tubing is used, it MUST comply with limitation set in
Local Codes, or in the absence of local codes, the gas codes of
the country having jurisdiction.

•

Two-stage

25-23-23c

Gas Valve with Elbows

LP gas dealer make all connections
at storage
all connections
from tank to furnace.

regulation of LP gas is recommended.

(*8DNL)

FIRE OR EXPLOSION HAZARD.
A natural gas or LP gas leak ignited by an open
flame or spark could result in death, personal injury
and/or property damage.
Natural gas is lighter than air and will rise. Liquefied
petroleum (LP) gas is heavier than air and will settle
and remain in low areas and open depressions.
Thoroughly
ventilate area and dissipate gas. Do
NOT use a match or open flame to test for leaks, or
attempt to start up furnace before thoroughly
ventilating area.

25-25-03

Gas Valve with Elbows

(*aDNL)

Final Check
•

Test all pipes

•

If orifices
leaks.

•

During

for leaks.

were

pressure

changed,

testing

make

sure

of gas supply

they

piping

are checked

for

system:

a. If test pressure
does not exceed
1/2 psi, isolate
the
furnace from the gas supply piping system by closing the
equipment
shutoff valve.
25-25-12

Gas supply

line then can be run directly

into opening

b. If test

of elbow.

Assemble
in Figure

elbows
8.

steps

441 01 2314 02

and nipples

2 through

similar

4 Piping

with

to street

elbows

Street

Elbows.

shown

exceeds

1/2 psi,

the

valve must
system.

furnace

To check for leaks
each joint. Bubbles

apply soap suds or a liquid
forming indicate a leak.

•

Do not use an open flame to test for gas leaks.
sion could occur.

•

Correct

even the smallest

and

its

be disconnected

•

Piping with Close Nipples and Standard Elbows
1.

pressure

manual equipment
shutoff
from the gas supply piping

detergent

Fire or explo-

leak at once.

8. Electrical

Wiring
7.

ELECTRICALSHOCK

HAZARD.

Failure to follow safety warnings
result in death or personal injury.

exactly

could

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.

Power Supply Wiring
The furnace MUST be electrically
wired and grounded
in accordance with local codes, or in the absence of local codes, with the
National Electrical
Code (NEC), ANSI/NFPA
70-2002
or the Canadian
Electrical
Code (CEC), CSA C22.1

in the U.S.,
in Canada.

The power supply to the furnace connections must be between
104 VAC and 127 VAC during furnace operation for acceptable
performance.
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. Wire and
circuit breaker sizing shall be based on the ampacity of the furnace
electrical components
plus the amps for all installed accessories
(1.0 amps toni for EAC and HUM). Ampacity can be determined
by
using the NEC or CEC.

NOTE: Furnace will not have normal operation is line polarity is reversed. Check ALL field and control connections prior to operation.
Furnace must be installed so the electrical components
are protected from water and connected
to its own separate
circuit.

J- Box Relocation
The J-box is installed on left side of casing.
location on right side can be used.

An alternate

J-box

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

Remove

Move

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

A wire tie may need

Apply

and discard

two screws

holding

J-box

Position all wires away from sharp edges
Do not pinch J-box
or other wires when
compartment
door.

Thermostat
Thermostat
location has an important effect on the operation of the
furnace.
Follow instructions
included with thermostat
for correct
mounting

and wiring.

Low voltage connections to furnace must be made on terminal
board of furnace control. (See Figure 11)
If cooling is used, the Y from the thermostat
must be connected
the control board Y to energize cooling blower speed.
Set thermostat
Support

heat anticipator

Heat anticipator
fier is installed.
mostat.
furnace

two hole plugs

right to left J-box
and attach

to be cut for additional
from

bag at left J-box

with the

Technical

setting will need to be measured
if 24VAC humidiMeasure currentin
series from R to W at thether-

Be sure 24VAC humidifier
is wired up to control.
Allow
to operate for 2 minutes before recording
the AC amper-

age reading.

Set anticipator

on thermostat

to recorded

value.

Optional Equipment
All wiring

from furnace

to optional

equipment

MUST conform

cal codes or, in the absence of local codes, the applicable
codes. Install wiring in accordance
with manufacturer's
tions.

Humidifier/Electronic

to lo-

national
instruc-

Air Cleaner

The furnace is wired for humidifier
connection.

and/or electronic air cleaner

REDUCED FURNACE LIFEHAZARD
Failure to follow
reduced
furnace

caution
life.

Do NOT exceed
115V/1.0
load for both
the EAC
terminal
combined.

instructions

may result

amp. maximum
current
terminal
and the HUM

to casing.

location.
using

wire

in accordance

Manual.

HUMIDIFIER
large hole plug from

and moving parts.
reinstalling
blower

two self-

length.

location.

pressure
gized

switch

when

The HUM
closes

the inducer

(115VAC)

is energized

on a call for heat.

when

The HUM

the

is ener-

is energized.

ELECTRONIC AIR CLEANER - EAC is energized when there
is a blower speed call, except is NOT energized when blower
operates in the hard-wired continuous fan mode.

441 01 2314 02

Electrical

Control

Connections

%
llSV. 60Hz.

DiagnosticLight
24 VAC
HUM_4
--

BOX

Jumper
i

Ground

HUM

_tat
Therm°_ i

t
i

i
i

1
,

'I'
I,I

t
i

FUSE

i
i

25-24-98
Low Voltage
Terminal Board

Furnace Control Fuse
The 24V circuit contains a 5-amp, automotive-type
fuse located
on furnace control. (See Figure
12) Any electrical shorts of 24V
wiring during installation,
service, or maintenance
may cause fuse

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

25-25-13

to blow. If fuse replacement
size (5 amp.).

is required,

use only a fuse of identical

limits of voltage at which unit will operate satisfactorily

Furnace Control
The furnace control is preset at the factory with 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".

9. Ductwork

and Filter
nace is NOT permitted.
Supply
ONLY the bottom of the furnace.

CARBON MONOXIDE POISONING HAZARD.
Failure to properly
personal injury.

seal duct could result in death or

Do NOT draw return air from inside a closet or
utility room where furnace is located. Return air duct
MUST be sealed to furnace casing.

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

is permitted

Duct Design
Design and install the air distribution
Conditioning
Contractors
of America
methods that conform to local codes

system to comply with Air
manuals or other approved
and good trade practices.

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

FIRE HAZARD.

duct connection

through

Any blower

moving

which could

be objectionable

the supply

a high volume

when the unit is located

a living area. It is often advisable
der the floor and return air ducts
Refer to furnace Technical
airflow information.

and return

of air will produce

to route the supply
through the attic.

Support

Manual

air grilles.

audible

noise

very close to
air ducts

un-

(BlowerData)

for

Size ductwork to handle airflow for heating and air conditioning
if used.

Duct Installation Requirements
Duct

Connections

This furnace may be installed in only a top return-air
application.
Return air duct connection
through the side(s) or back of the fur441 01 231402

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

Eil

•

Ductwork installed in attic, or exposed
requires a minimum of 2" of insulation
barrier.

•

Ductwork
installed in an indoor unconditioned
space requires
a minimum of 1" of insulation with indoor type vapor barrier.

CARBON MONOXIDE POISONING HAZARD.
Failure to follow safety warning
result in death or personal injury.

exactly

could

Install cooling coil on furnace discharge. Cool air
passing
over heat exchanger
could
cause
condensate to form resulting in heat exchanger
failure.

to outside temperatures
with outdoor type vapor

Inspection Panel on Some Models
For a furnace

not equipped

with a cooling

be provided with a removable
accessible when the furnace

coil, the outlet duct shall

access panel. This opening shall be
is installed and shall be of such a size

that the heat excha nger can be viewed for possible openings using
light assistance
or a probe can be inserted for sampling
the air
stream. This access cover shall be attached in such a manner as
When the furnace is used with a cooling unit, the furnace shall
be installed parallel with or on the upstream side of the cooling
unit to avoid condensation
in the heating element.
With a parallel

flow arrangement,

the dampers

or other means

used to control flow of air shall be adequate to prevent chilled
air from entering the furnace.
Chilled air going through the furnace could cause condensation
and shorten
furnace
life.
Dampers (purchased
locally) can be either automatic or manual. Manually
or automatically
operated
dampers
MUST be
equipped with a means to prevent furnace or air conditioning
operation,
unless damper is in the full heat or cool position
Installation
branches,

flexible

and supply

duct connectors

connections

Sub-bases

sub-base for
Combustible
Floors
Part Number
Furnace

The

N _

Subbase

NOTE:

for Combustible

Floors - Furnace Only
Floors

Supply

opening

is 37/8"

MUST

Cut the opening

in the floor

be used

when

the

rear

of the

from a wall behind

according

Table 4 because the base is equipped
center the base over the opening.

furnace.
the fur-

to the dimensions
with locating

The opening in the base is 11/4" shorter and 11/8" narrower
than the minimum required size of the opening in the floor. This
is done to maintain a 1" clearance
between the floor and the
plenum.
2.

Fabricate

the plenum

that the dimensions

to the dimensions
given

are outside

given in Table

4. Note

dimensions.

Floors Dimensions

for Combustible
Dimensions

Opening

In Floor

Opening In
Base For Plenum

K**

Typical Plenum
Dimensions

NAHHOOISB

1511/16

283/4

149/16

16114

14518

131/2

NAHHOO2SB

195/16

283/4

183/16

16114

18114

171/8

171/8
221/2

24J/4

28J/4

239/16

16]/4

235/8

221/2

NAHHOO4SB

1511/16

209/16

149/16

161/4

145/8

131/2

NAHHOOSSB

195/16

209/16

183/16

161/4

181/4

171/8

NAHHOO9SB

24]]/16

209/16

239/16

16]/4

235/8

221/2

Subbase

for

Coil Box

Outside Dimension
_

Base Spacer Side To Side

Set the base over the opening in the floor, centering the opening in the base over the opening in the floor. Fasten the base to
the floor with screws or nails. See Figure 13 and Figure 14.

Drop the plenum through the opening in the base.
of the plenum should rest on top of the combustible

tabs that

Only

NAHHOIOSB

floor, even when the fur-

from

Therefore
maintain a 37/8 ', clearance
nace (where applicable).

are recommended

for Combustible

sub-base
Floor

for Combustible

downflow furnace is set on a combustible
nace is installed on a coil box.

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.

Table

air leaks.

Sub-Bases

of locking-type
dampers
is recommended
in all
or in individual
ducts to balance system's air flows.

Non-combustible,
for return

to prevent

The flange
floor base.

441 01 2314 02

Exploded
Furnace

View
ONLY

of Sub-Base

for

Exploded
Downflow

View of Base for
Cased Coil

Plenum

H
J

Combustible
Floor Base

25-21-46b
25-21-46b

Consideration
must be given to the height of the base to allow for
easy installation
of the condensate
drain. See Figure 17. This

Setting

subbase
for combustible
floors has been designed
so that the
height of the subbase ra ises the downflow
coil off the floor to allow
easy installation
of the condensate
drain

the Base

Setting

the

Base

Subbase
Insulation

co,
Subbase
Insulation

Wood Floor

Plenum
25-20-46A

Wood Screw

Sub-base for Combustible

Floors- Downflow Coil

Condensate

Plenum

Line Raised

25-20-46A

by Base

Adapter Box
The subbase for combustible
floors is required when a downflow
furnace,
used with a downflowcoilbox,
is set on combustible
flooring.
7

NOTE: Supply opening is 3 /8' from the rear of the furnace. Therefore maintain
a 37/8 " clearance
from wall (where applicable).
25-20-52

Cut the opening in the floor according
Table 4 because the base is equipped
center the base over the opening.

to the dimensions
in
with locating tabs that

Non-Combustible

Floor:

The opening
in the base is 11/4" shorter and 11/8" narrower
than the minimum required size of the opening in the floor. This
is done to maintain
a 1" clearance
between
the floor and the

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.

plenum.

Filters:
be used.

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

Set the base over the opening in the floor, centering the opening in the base over the opening in the floor. Fasten the base to
the floor with screws or nails. See Figure 15 and Figure 16.

furnace may be installed in the return air plenum above the furnace. A filter rack is supplied with each furnace. See Figure 18.

Drop the plenum through the opening in the base.
of the plenum should rest on top of the combustible

•

441 01 231402

4. Note that

A filter MUST

The 181/4" X 1 53/4" framed

The flange
floor base.

Use either

high-velocity

filters

supplied

with the

filter type:

Washable,
flow rating

high-velocity
of 600 FPM.

filters

are based

on a maximum

air

Disposable,
lowvelocity
filtersarebasedona maximum
air
flowof300FPMwhenusedwithexternal
filtergrille.
i

•

See
page 33, Circulation
mation.

Air Blower

Data for additional

infor-

If there is insufficient

plenum

height

for this type of installation,

fil-

ters may be installed in any accessible
location in the return air
system. In such a case, the filters should be of equivalent
size and
style as originally
supplied with the furnace.

Filter

Installation

REDUCED FURNACE LIFE HAZARD
Failure to follow caution
reduced furnace life.

instructions

Version

may result in

Use of excessively
dirty and/or restrictive
air filters
may
increase
furnace
operating
temperatures
and shorten
the life of the furnace.

,,A,, l

"A'"

14" (350mm)

Filters
supplied
with
the furnace
are rated
at a
maximum
of 600 fpm air velocity
and sized for the
furnace's
airflow rate. Replacement
filters must be of
equivalent
type, size, and rating except as described
below.

Disposable,
low-velocity
filters may be used to
replace washable, high-velocity
filters, providing
they are sized for 300 FPM or less.
25-25-14

OR
Filter

Rack

Installation

Version

"B"

16"
Version

"A"

factory-attached
top of the blower

(400mm)

to the
housing

25-25-14a

OR
Version
factory-supplied
installed

"B"
but field

The redesigned

filter bracket

needs

to be centered

on top of the

flanges spanning the depth of the flange opening.
Position it sothe
"V" portion is between the inner sides of the flanges with the flat
tabs are resting on top of the flange edges. The tabs can then be
bent over the flanges on both ends by hand or by tapping lightly
with a hammer to secure the bracket to the top of the furnace. (see
Figure 18)

NOTE: The return air plenum MUST extend a sufficient
above the furnace (dimension
"A" in Figure 19) to provide
attachment

of a return

air duct or grille above

height
for the

No further attachment
is necessary.
Once the plenum is attached
to the top of the furnace the bracket will not move. The bracket will
look like Figure 18 after being formed onto the flanges.

the filters.

NOTE: Plenum must be fitted as close to the return air flange of the
furnace as possible to eliminate any air bypassing
the filters.

Filter Removal
1.

Remove

the right hand side of the fur-

nace blower opening.
Slide filter into furnace until it is in position to
be pushed up and over into place on the left hand side of furnace.
See Figure 19.

Reach up above right side of blower
rack at top of furnace.

Straighten
up filters and pull straight
Pull out through right door opening.

Slide remaining

filter into furnace

Vacuum

side of furnace.

See Figure

Filters

can only be installed

through

19.

and up into place

on right hand

blower

compartment

door.
and lift dirty filters

down

out of

at side of blower.

clean or wash with warm water and dry thoroughly

fore replacing.
441 O1 2314 02

be-

NOTE:

If filters

are only

suitable

vise homeowner
that filter
conditioning
is added.

application,

ad-

size may need to be increased

for heating

if air

Addition Of Air Conditioning

must be consulted

for proper

coil location

and installation

proce-

dures.
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.

When a refrigeration
coil is used in conjunction
with this furnace, it
must be installed on the discharge
side of the furnace to avoid condensation
on the heat exchanger.
The coil installation
instructions

10. Checks

Copper or plastic tubing may be used for the condensate drain line.

and AdJustments
iiiiiiiil!!!!! ii¸¸Iiiiiii_
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Startup

!!i!!iiil;;i;;iiiiiiiiiiiiiiii;iiiiiii

Typical
NOTE:
Manual.

Refer

to startup

procedures

in the

Users

Gas

RegulatorAdjustment
Under Ca

ELECTRICAL

Control

Valve

Information

SHOCK, FIRE, OR EXPLOSION HAZRD.

HONEYWELL

Outlet
Pressure

©o

Tap
1/8NPT
/

Failure to follow safety warnings exactly could result
in death, personal injury, and/or property damage.
If any sparks, odors or unusual noises occur,
immediately
shut OFF gas and power to furnace.
Check for wiring errors or obstruction to blower.

OUTLET
Inlet
Pressure
Tap 1/8NPT
25-24-98a

Gas SupplyPressure

Set manifold

When the manifold
ment screw cover

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

6.
(See L.P. Gas Conversion Kit instruction manual for furnaces converted to L.P. gas)

to manifold

pressure

with burners

oper-

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
manometer.

gas

shut

off

before

Check

for leaks

5 or Table

the adjust-

at plug.

can be used to measure

with gas supplier

for actual

input to furnace.

BTU

content.

Turn OFF gas supply to all appliances
other
start furnace.
Use jumper
wire on R to W.

Time how many seconds it takes the smallest
meter to make one complete
revolution.

Note:
two.

If meter

content

than furnace

uses a 2 cubic foot dial, divide results

Refer to Example.
of 1,000

The Example
BTU's

per cubic

is based

and

dial on the gas

(seconds)

on a natural

gas BTU

foot.

Example
Natural Gas
BTU Content

With gas OFF, connect manometer
to manifold
pressure tap
on outlet of gas control valve. See Figure 20. Use a manometer with a 0" to 12" water column range.

Remove
manifold
pressure
adjustment
screw cover on furnace gas control valve.
Turn screw counterclockwise
to decrease manifold pressure and clockwise to increase pressure.
See Figure 20.

NOTE: Adjustment
screw cover MUST be replaced on gas control
valve before reading manifold
pressure
and operating
furnace.
441 01 231402

in Table

set, replace

connecting

Turn gas ON. Operate the furnace by using a jumper wire on
the R to W thermostat connections on the control.

shown

Remove jumper
wire from thermostat
connection
on control.
Remove manometer
connection
from manifold
pressure tap,
and replace plug in gas valve.

The gas meter
Make adjustment

to value

pressure is properly
on the gas valve.

Natural Gas Input Rating Check

Manifold Gas Pressure Adjustment
NOTE:
ating.

pressure

No. of Seconds
Per Hour

Time Per Cubic
Foot in

per cu, foot

BTU Per
Hour

Seconds

1,000

3,600

75,000

1,000 x 3,600 + 48 = 75,000 BTUH
Refer to Example.
The Example is based
content of 1,000 BTU's per cubic foot.
3.

Remove

Relight

jumper

on a natural

gas BTU

wire from R to W.

all appliances

and ensure

all pilots are operating.

Orifice Sizing
NOTE: Factory sized
the furnace Technical

orifices for natural
Support Manual.

and LP gas are listed

Ensure
furnace
isequipped
withthe
Refer

to Table

correct main burner orifices.
6 for correct orifice size and manifold

5 or Table

pressure for a given heating
and propane gas.

Operation

value

and specific

gravity

To use the natural

for natural

section

Above 2000' Altitude

FIRE,
EXPLOSION,
POISONING HAZARD.

high-altitude

qualified

CARBON

service

and

NamElevationeplate

local

agency

codes,

instructions

requirements,
the

of the altitude

MONOXIDE

gas-conversion

Manufacturer's

or
applicable

shall

be done

accordance

with

and
in

your

local gas utility for

and heating

value

provides

not only

the

manifold
pressure
but also the orifice size. In the natural gas
tables, the factoy-shipped
orifice size is in bold (42). Other sizes
must be obtained
from service parts.

Failure to follow safety warnings exactly could
result in death, personal injury
and/or property
damage.
This

gas table, first consult

the heating value of the gas supply. Select the heating value in the
first column and follow across the table until the appropriate
elevation for the installation
is reached.
The value in the box at the inter-

all

applicable

the

absence

national

High Altitude
Sea Level

Input
Input

High
Elevation

by a

Natural

Rate
Rate

Altitude

=
x (Multiplier)[USA]
Multiplier

Gas

LP Gas

2001'-3000'

0.95

0.90

3001'-4000'

0.93

0.86

4001'-5000'

0.91

0.82

codes

5001'-6000'

0.89

0.78

6001'-7000'

0.87

0.74

7001'-8000'

0.85

0.70

the

codes.

These furnace may be used at full input rating when installed at altitudes up to 2000'. When installed above 2000', the input must be
decreased
2% (natural gas) or 4% (LP gas) for each 1000' above

* Based

on mid-range

of elevation.

sea level in the USA. In Canada, the input rating must be derated
o
5% (natural) or 10 _ (LP) for each 1000' above sea level. This may
be accomplished
by a simple adjustment
of manifold
pressure or
an orifice change, or a combination
of a pressure
adjustment
and
an orifice change. The changes
required depend on the installation altitude and the heating value of the fuel. Table 5 & Table 6
show the proper furnace manifold pressure and gas orifice size to
achieve proper performance
based on elevation above sea level
for both natural gas and propane gas.

MANIFOLD PRESSUREAND ORIFICE SIZE FOR HIGH ALTITUDEAPPLICATIONS
NATURAL GAS MANIFOLD PRESSURE (" w.c.)
MEAN ELEVATION
0 to
2000

HEATING
VALUE
at ALTITUDE
BTU/CU. FT.

Orifice
No.

2001 to
3000

Manifold
Pressure

Orifice
No.

Manifold
Pressure

3001 to
4000
Orifice
No.

Manifold
Pressure

FEET ABOVE SEA LEVEL
4001 to
5000

Orifice
No.

Manifold
Pressure

5001 to
6000
Orifice
No.

Manifold
Pressure

6001 to
7000
Orifice
No.

Manifold
Pressure

725

3.7

75O

7001 to
8000
Orifice
No.

Manifold
Pressure

3.7

3.4

3.5

3,6

7OO

775

3.6

3,3

8OO

3.7

3.4

3.1

825

3.7

3.6

3,5

3.2

2,9

85O

3.5

3.4

3.3

3.0

2.8

875

3.6

3.4

3.1

2.8

2.6

9OO

3,7

3,4

3.2

2,9

2.7

2,5

925

3.7

3.5

3.3

3.0

2,8

2.5

3.3

95O

3.5

3,3

3,1

2.9

2.6

2.4

3.1

975

3.7

3.2

2.9

2.7

2.5

3.2

3.6

1000

3,5

3,0

2.8

2.6

2.4

3.7

3.4

1050

3,2

2,7

2,5

3.3

3.6

1100

3.6

2.5

3.2

3.6

NOTE: Natural gas data is based on 0.60 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code
ANSI Z223.1-2002/NFPA
54-2002 or National Standard of Canada, Natural Gas And Propane Installation Code CSA B149.1-05.

441 01 2314 02

LPG or PROPANE GAS MANIFOLD
HEATING VALUE

NOTE:

MEAN ELEVATION

at ALTITUDE
BTU/CU, FT.

0 to
2000

2001 to
3000

2500

10.0

Orifice Size

#54

The derating

PRESSURE (" w.c.)

10.0

9.0

10.0

#54

#55

5001 to
6000

6001 to
7000

7001 to
8000

9.4

8.5

10.0

#55

#56

at 2% (Natural

Gas) and 4% (Propane

Gas) has been tested

Gas) and 10% (Propane

Gas) for altitudes

NOTE:

Gas) and 4% (Propane

Gas) has been tested

of these

furnaces

4001 to
5000

In Canada, the input rating must be derated 5% (Natural
the 2001 to 3000 column in Table 5 and Table 6.
The derating

of these

FEET ABOVE SEA LEVEL

3001 to
4000

furnaces

at 2% (Natural

The burner orifice part nos. are as follows:
Orifice #41
1096942
Orifice #42
Orifice #43
1011377
Orifice #44
Orifice #45
1011353
Orifice #54
Orifice #55
1011354
Orifice #56

1011351
1011352
1011376
1011355

Altitude

The factory-installed

Air Pressure
pressure

switch

by CSA.

and design-certified

by CSA.

Clearances
Measure
( I back

High

and design-certified

of 2,000 to 4,500 above sea level. Use

from face of orifice

to the

side of the manifold,

Switch

need

NOT be changed

any furnace installations
from sea level up to and including
altitude. See service parts for use above 8,000' altitude.

for

8,000'

Changing Orifices
1.

After disconnecting
move the burner
compartment.

power and gas supply to the furnace, recompartment
door, exposing
the burner

Disconnect
removed.

gas line from gas control

Disconnect
wiring at gas control valve. Be sure to note the
proper location
of all electrical
wiring before being disconnected.

Remove the four (4) screws holding the manifold and gas control valve to the manifold supports. Do not discard any screws.
See Figure 21.

Carefully

remove

the manifold

valve so manifold

Reassemble
all parts in reverse order as removed.
Be sure to
engage the main burner orifices in the proper openings
in the
burners.

After reassembling,
leaks using a soapy
diately.

can be

assembly.

Manifold

turn gas on and check all joints for gas
solution. All leaks must be repaired imme-

LP Conversion
the furnace rating plate for the LP conversion
accessory
kit part
An accessory kit shall be used to convert to propane gas use, see
number.

CARBON
Failure
death,
injury.

MONOXIDE
to follow
property

HAZARD.

this warning
can result
damage
and/or
personal

Nox inserts for use with
ONLY. If LP Gas is required,
removed.

FIRE, EXPLOSION,

25-25-15

Failure
death,
injury.

to follow
property

Natural Gas units
NOx inserts must be

UNIT DAMAGE

HAZARD.

this warning
can result
damage
and/or
personal

An LP conversion
accessory
kit is required
when operating
the furnace with LP gas.
Remove the orifices from the manifold
proper sized orifices. See Figure 22.

and replace

them

with
For LP conversion
discard

Tighten orifices
Figure 22.

441 01 231402

so they are seated and gas-tight.

remove

screws

insert.

See
Reinstall

screws.

See Figure

that secure

the NOx insert and

NOTE: It is very important to reinstall the NOx insert mounting
screws.

Air Temperature Rise Check

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¸II
¸II¸I
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Removing

NOx

inserts

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

rise may

Use ONLY the blower motor speed taps marked "Y" for
YES for setting

air temperature

rise.

Blower Motor Speed Taps for
"8DNL ModelSizes
LO
RED

M LO
BLUE

M HI
ORN

HI
BLK

050B12

075B12

075F16

100F14

100J20

100L20

125L20

ModelSizes

Main Burner Flame Check
Allow the furnace to run approximately
10 minutes.
the main burner and pilot flames. See Figure 24.
Check

for the following

(Figure

Then

inspect

24):

•

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

•

Flames

extending

•

Flames

do NOT touch

directly

from

sides

burner

To check

MUST

temperature

be set to give the correct

air temperature

as marked on the rating plate. Temperabetween supply and return air tempera-

rise, use the following

procedure:

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

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

Take readings
plate.

If the air 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

are noted, it may be necor check for drafts.

Main Burner

speed

rise through the furnace
ture rise is the difference
tures.

into heat exchanger.

of heat exchanger

If any problems with main burner flames
essary to adjust manifold
gas pressure,

The blower

temperature
5.

Remove

and compare

with

range

specified

on rating

rise.

the jumper

wire after the adjustments

are complete.

Changing Blower Speed

ELECTRICAL
Failure

NOTE: For Ignitor location see Figure 25.

disconnect

personal

Turn

OFF

SHOCK HAZARD.
power

could

result

in death

injury.

power

to furnace

before

changing

speed

taps.

Ignitor Location

NOTE:
21/16

The speed

taps that the manufacturer

sets at the factory

for this furnace 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
predict
the static
pressure
that will be applied to the furnace,
it is the responsibility
of the
installer
dealer/contractor
to select
the proper
speed
tap
leads
25-25-08

NOTE: Flame sensor has a different orientation

in all 050 models.

for the application

If it is necessary
1.

to change

when

the furnace

speeds,

is installed.

refer to steps

Refer to Furnace Hhking Diagram for location
and cooling speed taps located on the furnace

below.
of the heating
control as well

441 01 2314 02

aslocation
of unused
blowermotorspeedleads.Usethe

the thermostat

chart (Table

FAN switch is turned from auto to ON the fan will operate continuously at "HEAT" speed.
EAC will be energized
in this mode.

7) to determine

the blower

motor speed settin(

to the G terminal

on the furnace

control.

When the

Blower Speed Chart
NOTE:
Wire

Motor Speed

Color
Black

Med-

Red

speed

may not be provided

on all models.

blower motor speed by removing the
the "Heat" or "Cool" terminal and remotor speed lead from the "MI"
or
the wire previously
removed from the
to the vacated "M1" or "M2" termi-

Note: When using the same speed on motors with (4) speed
leads, it will be necessary
to 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 "MI"
or "M2" location.
check

the

system

of the circulating

after

modification

air blower

to ensure

in all modes

the

of opera-

Continuous-Fan Operation using "G"
Energizing

the"G"

uous fan operation.

terminal

on the furnace

This is done

11. Furnace

control

by connecting

Failure
to
have
the
maintained
could result
and/or property
damage.

provides

contin-

the G terminal

furnace
in death,

MONOXIDE

inspected
personal

and
injury

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

and

Information

Operation

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
er two speeds (Heat or Cool) are not energized.
in this mode.

whenever
the othEAC not powered

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
Connect
terminal
should

for Heat, Cool, and

low speed lead from circulating
air motor
at the furnace
control.
The appropriate
already

be connected

to the "Heat"

Heating and Continuous-Fan

to the "Cont"
motor leads

and "Cool"

terminals.

Speed the Same

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

Manual".

ELECTRICAL
HAZARD

SHOCK,

lead going to the "Heat"

FIRE

EXPLOSION

Failure to follow safety warnings
exactly could
result in dangerous operation, serious injury, death
or property damage.
Improper
servicing
could result in dangerous
operation,
death, personal
injury or property
damage.
• Before servicing, disconnect all electrical power
to furnace.
• When servicing
disconnecting.

controls, label all wires prior to
Reconnect wires correctly.

• Verify proper operation

441 01 2314 02

ignition

Maintenance

FIRE,
EXPLOSION,
OR CARBON
POISONING HAZARDS

See "User's

furnace

speed.

A terminal is provided on the furnace control located in the circulating air blower compartment
for operation
of the continuous-fan
option.
This connection
is intended for the low speed motor tap,

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
"M1" or "M2" location or tape off. Attach a jumper
between
the "Heat"
and "Cool"
terminals
and the remaining
motor
speed lead.

proper operation
tion.

at heating

Low

Change the heat or cool
motor speed lead from
place it with the desired
"M2" location. Connect
"Heat" or "Cool" terminal
nal.

Thoroughly

the fan will turn off during

Hard Wired Continuous-Fan

Med-High

Blue

In heating,

up then restart

High

Orange*

* Med-High

warm

after servicing.

12. Sequence
The following

of Operation

is the normal

operating

& Diagnostics

sequence.

Cooling (Y) Request:
24VAC
•

signals

applied

Cool motor

speed

Y & G signals

removed

•

speed

Cool motor

Continuous

to Y & G terminals
is energized
from

Circulating
is applied

•

speed

Heat motor

G signal
•

removed

Heat motor

from

NOTE

1) Furnace

unless

a blower

NOTE

2) Heating

de-energizes

•

blower

requests

NOTE

time.

delay.

to the Cont

received

or Cooling

terminal

during

warm-up

a Fan request

The fan returns

period on a call for Heating

on the FCB, in which
cause

to continuous

case

during a G request

2).

to change

to the appropriate

the fan speed

circulating

that occurs

see NOTE

speed after the selected

heat or cool

Fan Off Delay time ex pires

request.

Fan Hard-Wired (Cont) Request:

motor

is energized

demands

Fan Off Delay

the fan during the heat exchanger

or Cooling

low speed

Low speed

Cool

after 5 second

lead is connected

Circulating

Field selected

time.

FCB.

loss of the Heating

Continuous

board)

of the FCB.

without

speed after the Fan on Delay time expires.
following

control

Fan On Delay

Fan (G) Request:

is de-energized

motor

Cool

after 90 second

to G terminal

is energized

speed

FCB (furnace

FCB

is de-energized

24 VAC signal

after 5 second

tap installed

when

from furnace

EAC is NOT active

power

on "CONT"

applied

control.

Fan demands

for hard-wired

terminal.

to furnace.

mode

Operates

from furnace

but IS active

at this speed
control

continuously

while

there

for heat, cool or "G" will override

for fan demands

from furnace

control

are no other
hard-wired

for heat,

speed tap.

cool and "G".

Heating (W) Request:
Heating

(W) Request:

•

24 VAC signal

applied

•

Inducer

turns

•

Following

•

The gas valve

•

The igniter

•

FCB will delay

W signal

motor

to W terminal

on and the pressure

a 15 second

prepurge

is energized,

is de-energized

removed

blower
from

delay

The gas valve de-energizes
The inducer

after the main

•

The fan stays at Heat speed.

•

The fan de-energizes

burners

and the main

after the selected

FIE R - The 24V HUM is energized
the inducer

burners

postpurge

Heat

4) If a new Heating
Fan Off Delay

then

closes,

the igniter

begins

a 17 second

warm-up.

is sensed.

ignite.
timed

from the opening

of the gas valve.

go out.

period.

Heat

Fan Off Delay

when the pressure

time expires,

switch closes

timed from the gas valve

on a call for heat.

de-energizing.

The 115V HUM (called

HUM on Control)

is energized.

ELECTRONIC
AIR CLEAN E R - EAC is energized
hard-wired
continuous
fan mode.
NOTE

switches

light and flame

for the 30 seconds

runs for a 15 second

when

close(s).

FCB.

•

is energized

switch(es)

after the pressure

the main burners

operation

•

HUMIDI

of FCB.

request

arrives

while

start a new heating

when there

the control
cycle

is a blower

is waiting

speed call. It is NOT energized

when blower

operates

in the

in the Heat Fan Off Delay time, the FCB will wait for the selected

as long as the heat call remains.

441 01 2314 02

Heating Request with Gas Shut Off:
24 VAC signal

applied

to W terminal

of FCB.

The FCB will attempt 4 cycles for ignition
Power reset will clear lockout.
•

Inducer

•

Following

•

The igniter

glows

red-hot

•

The igniter

stays

off for 17 seconds,

•

The igniter

glows

red hot for 22 seconds

•

The igniter

stays

off for 17 seconds,

•

The igniter

glows

red hot for 22 seconds

•

The igniter

stays

off for 17 seconds,

•

The igniter glows red hot for 22 seconds
flashing

•

motor

turns

then go to soft lockout

The inducer

again as long as the heat call remains.

a 15 second

error

for 3 hours then try for ignition

prepurge

delay,

the igniter

for 22 seconds,

begins

then turns

then

begins

to warm

up again.

off.

begins

flashes

error code

The FCB continues

to warm

then turns

then

up.

The FCB

then turns

then

warm

off.

flashing

error code

flashing

error code

up again.
The FCB continues

to warm

up again.

then turns off. The FCB proceeds

to soft lockout

and stops flashing

error code 6 and begins

code 6 + 1.
motor

de-energizes

after a 15 second

post purge.

Control Board Diagnostic Codes (See Figure 26)
OFF

= 24VAC

Heartbeat
ON SOLID

= Normal operation
or no previous
Diagnostic
Code
= Soft Lockout - Furnace Control Error (1 hr delay)

or 115VAC

1 Flash

If code repeats
= Not used

2 Flashes

= Pressure

switch(es)

3 Flashes

= Pressure

switch

4 Flashes

= Limit or roll-out

5 Flashes

= Flame

6 Flashes
6 + 1 Flashes

= Failure to ignite or flame sense lost while running
= Soft Lockout - Max trials for ignition reached
(3hr delay)

7 Flashes

= Soft Lockout

sensed

(roll-out
8 Flashes
10 Flashes

is off, fuse is open

immediately
closed

open

when

switch

open

following
when

power

should

reset then

replace

control

be open

be closed

out of sequence

- Limit or roll-out

switch

requires

manual

switch

open

longer

than 2 minutes

(1 hr delay)

reset)

= Permanent
Lockout - Gas valve relay contact stuck
= Line voltage (115VAC) polarity reversed.
If twinned,

closed or miswired gas valve (power
refer to twinning kit instructions

reset

only)

* If status code recall is needed, briefly (2-3 seconds)
remove then reconnect one limit switch wire (main or rollout) to display last stored
status code. Do not remove power or blower door before initiating status code recall or code will be lost. Code is automatically
cleared
after 72 hours or upon power reset.

* Proper flame sense microamps:

Control

441 01 2314 02

0.7 microamps D.C. minimum

2.0 - 4.0 microamps nominal

Board

441
012314
02

Save This

Manual

For Future

Reference

Models
+8DNL050B12B1
+8DNL075B12B1
+8DNL075F16B1
+8DNL100F14B1
+8DNL100L20B1
+8DNL125L20B1
+ Denotes Brand

International
Comfort
Lewisburg, TN 37097
Fast Parts Division
(866) 380-3278

441 01 2314 02

Products,

LLC
/

Model

Specifications

Manufacturers Number (Mfr No-See RatingPlate)
ALL Models
Specifications
*8DNLO5OB12

*8DNLO75B12

*8DNLO75F16

*8DNLIOOF14

*8DNLIOOL20

*8DNL125L20

General
Input(8tuh)
Output(Btuh)
Temp. Rise (F)

50,000
40,000
35-65

75,000
61,000
35-65

100,000
81,000
35-65

100,000
81,000
30-60

125,000
101,000
35-65

Electrical(Volts/Hz)

115/60

Rating PlateAmps

9.2

9.0

12.0

9.2

13.5

13.2

Gas
Type

NatI,P

NatI LP NatI'P

Transformer Size (VA)
T'stat Heat Anticipator
Gas & Ignition
Std.Main Orifices(No/Size)

NatI'P

Nat

40
.50

2I#42

2t#54

3I#42

3/#54

3/#42

3/#54

GasValve Honeywell
RegulationType)
ManifoldPress.(Inch'sWC)

4/#42

4/#54

4/#42

4/#54

5/#42

5/#54

VR 8205S
SNAP
3.5

110.0

3.5

110.0

3.5

110.0

IgnitionTypelSeries
Combustion
FlueOutlet Size (Inches)
Std.OutletTemp (F)
Limits & Controls
Thermal Sensor (F)
LimitControl

3.5

110.0

3.5

110.0

3.5

110.0

Hot Surface
4
<480

4
<480

300
See PartsList

11-10
11.91900
PSC/314
40/370
Washable
16x18xl (2)
3
5

11-10
11.91900
PSC/3/4
40/370
Washable
16x18x1(2)
3
5

Std.PressureSw. (Part No)
Press (Close)
Press (Open)

1013529
-0.69
-0.59

HighPressureSw. (Part No)

1014051

FurnaceControl(Type)
FurnaceControl On
(Timed-secs)
Off

Integrated
30
60,100,140,180

Blower Data
Type & Size
MotorAmps/Rpm
MotorTypelH.p.
Cap.Mfd/Volts
FilterType(600 FPM)
FilterSize (")
Min. CoolCap. (Tons)
Max. CoolCap. (Tons)

11-8
8/1050
PSC/II2
7.51370
Washable
16x18xl (2)
1.5
3

11-8
811050
PSC/II3
5.01370
Washable
16x18xl (2)
1.5
3

11-10
10/1050
PSC/I/2
10/370
Washable
16x18x1(2)
3
4

11-10
8/900
PSC/II2
7.51370
Washable
16x18xl(2)
2
3.5

Gas Conversion Kits
Natto LP

NAHA001LP(1172958*)

LPtoNat

NAHA001NG(1172960*)

* Must be ordered from ServiceParts

THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE

44101231402

Circulation

Air Blower

Data

(CFM #)

*8DNLO50B12

*8DNLIOOF14
Air Delivery

in Cubic Feet per Minute (C.F.M.)

(Furnace

Rated

@0.5"

in Cubic Feet per Minute (C.F.M.)

(Furnace

TAP

LOW

MED L

MED H

HIGH

_-_5,

.10

702

963

1260

1537

,£

Rated

@0.5"

ESP)

TAP

LOW

MED L

MED H

HIGH

_-_5,

.10

756

1012

1372

1881

,£

,30

624

845

1183

1416

,30

585

888

1273

1724

.60

510

760

1088

1308

.50

491

780

1176

1606

,70

412

617

917

1111

,70

387

697

1035

1481

.90

310

468

664

948

.90

255

561

873

1281

1,00

249

436

529

808

1.0

210

444

767

1132

•_
uJ

*8DNLO75B12
Rated

@0.5"

MED L

MED H

HIGH

•_O'

,10

634

728

975

1353

'£

.30

533

653

936

1307

,50

454

559

861

1225

.70

373

473

737

1087

,90

255

392

605

884

1,00

232

294

529

764

*8DNL075F16

@0.5"

ESP)

LOW

MED L

MED H

HIGH

•_ O'

,10

1798

2024

2212

2375

'-£
To

.30

1709

1896

2081

2205

,50

1614

1774

1922

2026

.70

1470

1614

1752

1860

,90

1282

1428

1548

1645

1.00

1065

1263

1407

1508

x
uJ

in Cubic Feet per Minute (C.F.M.)

(Furnace

Rated

@0.5"

Air Delivery

ESP)

in Cubic Feet per Minute (C.F.M.)

(Furnace

TAP

LOW

MED L

MED H

HIGH

.10

648

900

1285

1789

,30

628

916

1328

1747

.50

611

889

1309

1680

,70

557

843

1240

1588

.90

485

748

1122

1452

1,00

441

680

1041

1374

,£

Rated

TAP

*8DNL125L20
Air Delivery

in Cubic Feet per Minute (C.F.M,)

(Furnace

LOW

Air Delivery

ESP)

TAP

"_
ua

x
uJ

in Cubic Feet per Minute (C.F.M,)

(Furnace

*8DNL100L20
Air Delivery

x
_J

Air Delivery

ESP)

@0.5"

ESP)

LOW

MED L

MED H

HIGH

.10

1936

2165

2319

---

,30

1845

2028

2246

2334

.50

1728

1902

2061

2172

,70

1536

1695

1856

1952

.90

1331

1490

1800

1687

1.00

1215

1352

1424

1537

5
,£

x
_J

Rated

TAP

• Denotes Brand

#Filter
CFMrequired
- Cubic for
feeteach
per minute
return-airairflow.
inlet. Airflow performance

44101231402

includes 1" washable (600 FPM max) filter media.

THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE

CONNECTION

WARNING:
ELECTRICAL
DISCONNECT
BEFORE

DIAGRAM

LADDER

SHOCK
HAZARD
SERVICING

ROLLOUT
SWITCH1TO2

TO
LP

PRESSURE

CAPACITOR

'NSE_hSM_D'NG
M_NL'M'T
_VSsS
E _.,,T&.
E
--I--(_)--_.R7
_o--_-(_--..(:_-,
_
(WHEN

USED)

(WHEN

USED)

(SOME

COPPER

I TO 21N SERIES
DEPENDINGON MODEL

MOTOR

.OTE._

_:=

100 18(

_1_1_-

x_'_'

IND

_1__U

RELAY

_ _

I IGNI,T_
ON

JUNCTION

_I_--

,'_"-_

o_:<"

/'_

...

MHI (O)
MLO

(BL)

RELAY _EAC

SEC

IN
•

COM

.q ,o_t,
CONT

PSC

_LOWER

U= _

FAN

_
_mZ

,oo,_o

___
_

"m,',,",,ROLLOUT
IN

SWITCH

100SEC
Ill

1 TO3

SE RIES
DEPENDING
ON
MODEL

FUSE

TRANSFOR
--

MER

LIMIT

NOTE

24VAC

COM

J 1

R BL"

1. If any of the original equipment wire is replaced use wire rated 105° C.
2. Use only copper wire between the disconnect switch and the furnace
junction box.
3. This wire must be connected to furnace sheet metal for contlol to
prove flame.
4. Symbols are electdcat representation only.
5. Solid lines inside circuit board are printed circuit board tlaces and are
not depicted as shown in the legend.
6. Replace only with a 5 amp fuse.
7. Blower motor speed selections are for average conditions, see
installation taatrdctions for details on optimum speed selection.
8. Factory connected when LP Pressure Switch and BVSS (Chimney
Adapter Accessory Kit) are not installed.
9. Btawer off-delay, gas heating selections are (60, 100,146, and 180)
seconds, cooling or heat pump 90 seconds.
10. Ignition lockout will occur after four consecutive unsuccessful tdals for
ignition. Control will auto-reset after three hours.
11. Blower motor and inducer motor contain internal auto-reset thermal
overload switches.
12. Flame sensor: 0.7 pA D.C. minimum, 2.0 - 4.0 pA nominal.
13. Depending on model, P4 inducer motor leads may be in a single connector

:<>_<

m_
_

MAIN

Zr_

HEAT
_OO:
"'--WW ]- .....'-*'
I

mr_m_mr_

TR_R

MOTOR

_:CO:E

P3 1

HEAT

NOTT#13

RELAY --

_--,

_
Zmz

I._.
2

_ ::

©+_

(SOME MODELS

:ZoJ_

fT_NDU_ER_
I_1 CAPACITOR

_(>X)_w_

_7.g

GROUND

_INDUCER]_.-

2 ""

wr:-r2

•

=11

EQUIPMENT

7 ]-

•n

,..-t

×.

''_l

I_;]_P4

nN_
JUUL

%-_

--W_SENSOR

J.NEUTRAL _

=oo
moo
>00

m
>

%" I "

IGNITER

_
/_

NOTE

DIAGRAM

DISCONNECT

CONDUCTORS

-_'_¢JSTET_'U_E--S;_--.---_NDU(ER
% GRN/Y

FIELD

O.LY
OT
HOT
NEUTRAL
G,D L1_-"V/'sNwT,_T_C'H
°oK

MODELS)

NOTE #g

115VAC

SPEEDTAP

CODE

BLACK
ORANGE
BLUE

HI
MHI
MLO

RED

COLOR

LOW VOLTAGE

CODE

BLACK
BLUE
BROWN
GREEN/YELLOW
ORANGE
RED
WHITE
YELLOW

FIE LD

LINE VOLTAGE
LINE VOLTAGE

FACTORY
FIELD
ON CONTROL

JUNCTION
O
I

....

_,4

-4_1/
I P1 8

CPU

SS SWITCH

,TO_INSERIE_
_J_l-a
(LPMODELS ONLY)
NOTE#8 ,_

VALVE
RELAY

GAS

....

___!
BVSS

O
_q

FACTORY

LOW VOLTAGE

CONDUCTOR

BK
BL
BR
GRN/Y
O
R
W
Y

UNMARKED
TERMINAL
CONTROL
TERMINAL

_zO_Z_
--_

m_m_

[ CONTROL
_OARD

_--_

NOTE
(FIELDINSTALLED
#3

I1___1_'--

_)P13

._=_>_]

SENSOR

_" _ _
_

100

180

Parts for *8DNL
II

6
A

BB
18

\
O
BB

\
16

25-25-11-1

441 01 231402

Replacement
Models

- *8DNLO50B12B1,

Replacement
Key
No,

*SDNLO75B12B1,

part supplied

will be current

Functional Parts
Description

3
4

active part.

Part
Number

- *8DNL
*8DNL100F14B1,

050B12B1

075B12B1

Switch, Pressure

1013529

Wheel, Blower

1013011
1011420

Motor

Motor, BIr

Capacitor

1/115
1/115
1/115
1/115

100F14B1

100L20B1

125L20B1

1
1
1
1

1171728
1171727
1171729
1171982

7.SuF
5uF
10uF
40 uF

075F16B1

1172487
1172493
1172488
1172489

1/2 COW
1/3 COW
1/2 COW
3/4 CCW

place of purchase.

1014824
1014825
1014823

kit*

*SDNL125L20B1

*8DNL

Mount,

(Natural Gas)
*SDNLIOOL2OB1,

For parts not listed, consult

1014316
1014317
1014318
1014319
1014320
1014321

Heat Exchanger

Parts

*SDNLO75F16B1,

1
1
1

Transformer

1172810

Control

1172550

Switch, Interlock

1171981

Burner Assembly

1172884
1172965
1172966
1179667

1
1
1
1

Flame Sensor

1172827

Igniter

1172533

Orifice, Burner # 42

1011351

Valve, Gas

1172821

Switch, Limit (Rollout)

1013102

Switch, Limit (Main)

34335001
1009169
1008417
1065294
1320362

1
1
1
1
1

Blower, Combustion

1014433
1013517

Filter, Air

1009750

*See Table below for bell, band

location

1
2

on motor

Bellyband Location
on Motor
Model *8DNL

A(in.)

O50B12B1

1.38"

075B12B1

1.65"

075F16B1

1.81"

100F14B1

1.38"

100L20B1

1.65"

125L20B1

1.65"

441 01 231402

Replacement
Models

- "8DNL050B12B1,

Replacement

*8DNL075B12B1,

part supplied

Key
No,

*8DNL075F16B1,

will be current active part.

Non-Functional
Description
Panel,

Parts

Top

Part
Number

- *8DNL
"8DNL100F14B1,

(Natural Gas)
*8DNL100L20B1,

For parts not listed, consult

*8DNL125J20B1

place of purchase.

*8DNL
050B12B1

1013593
1013594
1014410

078B12B1

078F16B1

100F14B1

100L20B1

125L20B1

1
1

Box, Junction

1172860

Cover, Junction box

1012350

Partition, Blower

1013571
1013572
1014416

1
1

Housing, Blower

1172885
1172969

Hanger, Blower

1012328

721020013
721020008

E
F

Panel, Blower Cutoff

Clamp, Capacitor

1170643
1014315

Bracket, Control Mounting

1172846

Door, Blower

1173028
1173029
1173030
1173025
1173026
1173027
1173031
1173032
1173033

1
1

(Hell Only)
(Hell Only)
(Hell Only)
(Comfortmaker Only)
(Comfortmaker Only)
(Comfortmaker Only)
(Tempstar Only)
(Tempstar Only)
(Tempstar Only)

1172267
1172268
1172269

Bracket, Door

Door, Louver

Manifold,

(Hell Only)
(Hell Only)
(Hell Only)
(Comfortmaker Only)
(Comfortmaker Only)
(Comfortmaker Only)
(Tempstar Only)
(Tempstar Only)
(Tempstar Only)

Gas

1173020
1173021
1173022
1173017
1173018
1173019
1173023
1173024
1014435

1013478
1013479
1013480
1013481

1
1

1012377

Top, Burner Box

1013705
1013015
1013016

Bracket, Burner Box Sides

1012532

Baffle, Burner Box

1012338
1012339
1012340

1172847
1172848
1172849
1172850

Box

Gasket, Combustion

441 01 231402

Blower

1
1

1014033
1013483
1013484
1013485
1013540

Collector

Bracket, Manifold Support

Bottom, Burner Box

1
1

Replacement
Models

- "8DNLO50B12B1,

Replacement

part

Key
No,
AA

Partition, Front Heat Exchanger

Gaskets,

Tubing, Silicone

Heat Exchanger

be current

Parts

'SDNLO75F16B1,
active
Part
Number
1013543
1013521
1013545
1013548
1013547
1013548

)art.

- "8DNL

For

parts

not

(Natural Gas)

"8DNL100F14B1,

'8DNLIOOL2OB1,

listed,

consult

'SDNL125J20B1

place

of purchase.

"SDNL
080B12B1

075B12B1

075F16B1

100F14B1

100L20B1

125L20B1

1
1
1
1

1013991
1013992
1013993
1013994
1172190
1172191

Baffle, Nox

1014019

Shield, Flue Pipe

1013975

Pipe, Flue

1014031

Rack, Filter (Version A)

1014020

Rack, Filter (Version B)

1173903

Sightglass

1172768

Fuse, 5 Amp

1083348

Harness, Wire

1172819
1172820

1
1

L2
MM

)(
)(
)(

)(

will

Non-Functional
Description

supplied

'SDNLO75B12B1,

PART NOT ILLUSTRATED

Manual,

Installation

441 01 2314 02

Manual,

Users

441 02 2011 01

441 01 231402

Source Exif Data:

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ICP C8DNL050B12B1 User Manual 80+ SINGLE STAGE GAS FURNACE Manuals And Guides L0601261

ICP Furnace/Heater, Gas Manual L0601261 ICP Furnace/Heater, Gas Owner's Manual, ICP Furnace/Heater, Gas installation guides

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