CARRIER Furnace/Heater, Gas Manual L0503144

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

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4-Way
HEATUNG

88MSA
Fixed-Capacity

MuMtipoise

Condensing

& COOUNG

Gas Furnace

\isit _ v_w carrier.corn

Installation, Start-Up,

and Operating

For Sizes 040--120

Series

t50

I mlCI[NCY

I$O 9001:2000

A93040

NOTE: Read the entire instl_action manual be%re starting the
installation
This symbol -->indicates a change since the last issue,
Index

Page

DIMENSIONAL DRAWING
3
SAFETY CONSIDERATIONS
2
(learances to ( ombustibles
4
CODES AND STANDARDS ........................................................
5
ELE< TROSTATIC DIS

¢AIRFLOW
_

AIRFLOW
HO _II_C_NTALN'NI
0

Fig.

1--NuRipoise

Orientations

Condensate Drain ....................................................................
General .......................................
Application .......................................
Condensate Drain Protection ......................
START°UP, ADJL STMENTS AND SAFETY (HECK .......
General ..........................................
Prime ( ondensate Trap With Warm ....................
Purge Gas Lines ...................................
Sequence of Operation .............................
Heating Mode .................................
Cooling Mode ................................
Continuous Blowe* Mode ........................
Heat Pump Mode ..............................
Component Test ...............................
Adjustments
.......................................
Set Gas Input Rate ..............................
Set Temperature Rise ................................
Blower Off"Delay (Heat Mode) ....................
Set Thermostat Heat Anticipator ....................

at any time, specifications

Printed in U.S.A.

HORLIZOTNTA _

Form

or designs

58MSA-11SI

without

notice
Pg 1

and without
2-05

35
35
35
36
37
37
37
38
38
38
38
38
39
39
39
39
44
44
45

incurring obligations.
Replaces:

58MSA-10SI

Check Safhty Controls
Check Prima_ Limit Control
Check Pressure Switch
CHECKLIST ......................................

45
45
45
45

Understand

personal
could

SAFETY CONSIDERATIONS

these signal words DANGER,

injury
result

identify

Improper

installation

quire excessive
failm'e
Application
attention

HAZARD

of this fm'nace

should

given to vent sizing

temperature

rise,

of fml_ace

o1" cause

premature

may re=

with

(fbm_erly

special

gas input rate, air

Muhipoise

gases

(see ftmmce

attics,

basements,

The

and unit sizing.

Improper
nance,
sion,

ELECTRICAL
POISONING

to follow this warning

firQ personal

or use can cause
fire,

electrical

cause personal
installer,

carbon

tor or branch

shock,

must

Installing

and servicing

gas

electrical
should

Untrained

personnel

such as cleaning
heating

fi/rnace

rating

trained

These

instructions

cover

especially

distribu-

The

qualified

and

heating

with

due to

working

unit

and

requirements

other

these

safety

and confoml

resider>

instrnctions

safety

available
calls,

glasses

during

and work

start=up

gloves.

Have

and adjustment

a fire

as a

extinguisher

procedures

such

and service

to %tlow

this caution

may result

in personal

Sheet metal parts may have sharp edges or bun's
wear

appropriate

protective

clothing

injury.

Use care and

and gloves

when

ban=

dling parts.
Recognize
safety information.
When you see this symbol
manuals,

This is the safety=alert symbol Z_
on the unit and in instructions
or

be alert to the potential

for personal

injury.

NOT

gas. A CSA

furnace

for use with

material

and controls.

floor

materials
this

on carpeting,

base

and wood

Nmace

MUST

flooring.

is installed

Part No. CD5 or CK5, or when Coil

is used.

The design

for

of this fi/rnace

continuous

with a night

setback

line is

fbr instalhomes,
or

return-air

operation

mininmm

down

to 55°F db

thermometer.

Return-air

db. Failure to follow
these
of heat exchangers,
motors,

(See Fig. 4.)

These Nrnaces
are shipped with the
connected
for UPFLOW
applications.
required

directly

AGA and CGA) designocertified
vehicles,
manufi_ctured
mobile

is designed

air

requirements.

accessow

of 60_>F db or intermittent
used

to supply

fiom the fimaace.

other than wood flooring.

when

(:oil Assembly

as when

materials

horizontally

be installed

required

when used in DOWNFLOW,

HORIZONTAL

LEFT

as shown

HORIZONTAL

(supply=air

in Fig.

drain and pressure
Minor modifications

discharge

1. See details

robes
are

RIGHT,

direction)

in Applications

applica-

section.

--€ Install this Nmace only in a location and position as specified
in
LOCATION
and INSTALLATION
sections of these instnlctions.

furnace

products

must be discharged

to an approved

Combustion

--€ Always

--> When

sections

as specified

a Nrnace

the return

which

is installed

within

the space

air shall also be handled

and terminating

Use a commercially

for detection
PIPING

the fitrnace's

has an external

so that supply

outside
outside

of leaks

section

intended

static pressure
TEMPERA-

ducts carry air circulated
containing

by ducts

the space

this
in the

of d_ese instructions.

flame.

range as specified
in the SET
of these instructions.

to areas

Connect

as specified

in the GAS

to operate

with a duct system

the allowable
RISE section

outdoors.
only,

made specifically

install the furnace

by tl_e fi/rnace
casing

system

Air and Vent piping

soap solution

rise range
within
TURE

vent

test for gas leaks with an open

check all connections
these instructions.

HAZARD

in alcoves,
and garages.

to combustibles.

temperature
must not exceed
80°F
return-air
limits may affect reliability

tions

are CSA

and propane

natural

to convert

on combustible

is not

furnace

available

Failure

erawlspaces,

fbr use with

factory

NOT CSA (formerly
lation in recreation
outdoors.

--€ Never

CUT

installed

base

temperature

must

Furnaces

fbr installation

code fbr further

SHALL

installations,

--€ Combustion
Wear

reliability,

for natural

fiom combustible

90B or local

furnaces

--€ This

on tags, and

those that may not have kept up with changing
require

is used to highlight

installation,

and

of 36 inches

Box Part No. KCAKC

fimctions

When

for a distance

manufacturer's

equipment.

in literature,

ductwork

Special

standards and safkty codes In some instances,
exceed
certain
local codes and ordinances,

tial construction
practices.
We
minimum
ibr a saf_ installation

NOTE

rooms,

clearances

a l-in. clearance

used when

qualified

maintenance

personnel.

the minimum

personal

gas.

downflow

and

All other operations

precautions

attached
to or shipped
that may apply

to existing national
these
instructions

or your

plate)
utility

tile, or any other combustible

may

can be hazardous

basic

service

observe

in minor

Gas-Fired

kit is required

Maintain

These

a qualified

trained

air filters

which

is used

result

design-certified

is factory=shipped

See NFPA

this product.

or service

perform

which

[itctory=authorized

Only

repair,

can

equipment,

on labels
precautions

only

equipment

and replacing

explo=

Consult

when modi_)ing

instMl,

poisoning,

or assistance.

use

heating

mainte°

gas supplier,

components.

persomiel

be performed

shock,

service,

conditions

damage.

fbr information

or agency

alteration,

or other

local

listed kits or accessories

and

AND

in electrical

monoxide

Jr!ire'y.,-or property

smwice agency,

installer

SHOCK
HAZARD

could result

adjustment,

hazards

CAUTION

in enhanced

Condensing

closets,

listed gas conversion

ir!inry, or death,

installation,

ma?

damage

will result

See Fig. 3 for required

Failure

signifies

or death.

which

AGA and (GA)

propane

FIRE,
EXPLOSION,
CARBON
MONOXIDE

WARNING
injury

and property

which

The 58MSA

component

be indoors

and material,

unit leveling,

and (AU°

or operation.

or misapplication

servicing

death.

practices

or product

suggestions
RELIABILITY

in personal

unsafe

injury
FURNACE

WARNING,

TION These words are used with the safkty=alert
symbol. DANGER identifies the most serious hazards which will result in severe

sealed

containing

the f:umace,
to the Nrnace
the fhrnace.

TYP

OaT
HORIZONTAL
POWER

LEFT)

{DOWNFLOW&
HORIZONTALRIGHT)
ORALTERNATE
gqN DIAGAS CONN

CONN

2qN

POWERENTRY
ACCESSORY

T
I4 _"
TYP

qN
DIA
THERMOSTAT

ENTRY

30 _;"

_"_

[

VENT

CONN

DRAINTRAP

LODATION
_

(ALTERNATE
CONDENSATE
UPFLOW)

SIDE INLET

i
i
i
i

17 :,i_"

TiP
9/6"

SIDE iNLET

CONDENSATE
DRA_N
DRAIN

S{OEiNLET
26 _,e"TVp

LO CATION

LOCATION
(UPFLO\M)

(UPFLOW)
DIMPLE
LOCATORS
FOR HORIZONTAL
HANGING

NOTES:

BOTTOM iNLET

1. Minimum return-air openings at furnace, based on metal duct if flex duct is used,
see flex duct manufacturer's
recommendations
for equivalent diameters
2 Minimum return-air opening at furnace:
a, For 800 CFM-16-in,
round or 14/_ x 12-in rectangle
b For 1200 CFM-20qn,
round or 14'h x 19 Lqn, rectangle
c, For 1600 CFM-22qn,
round or 14/;, x 23 L-in, rectangle
d For airflow requirements above 1800 CFM see Air Delivery table in Product Data
literature for specific use of single side inlets The use of both side inlets a
combination of 1 side and the bottom, or the bottom only will ensure adequate
return air openings for airflow requirements above 1800 CFM at 0_5 WC ESP
A02149

Dimensions
UNIT SIZE

(In.)
D

040-08

17-I/2

15-7/8

040-t2

17-I/2

15-7/8

080-08

17-I/2

15-7/8

080-t2

17-I/2

15-7/8

080-t6

17-I/2

15-7/8

080-t2

17-I/2

15-7/8

080-t6

17-I/2

15-7/8

080_20

19-3/8

19-1/2

100-16

19-3/8

19-1/2

100-20

19-3/8

19-1/2

120_20

24-I/2

22-7/8

Fig. 2--Dimensional

Drawing

--->A gas-fired fire, ace %1"installation in a residential garage must be
installed as specified in the Hazardous Locations section of these
insm/etions,

Installer Packet includes:

--> The [:urnaee is not to be used %r tempora U heating of buildings or
structures
under construction
unless the furnace installation
and

User's Information

operation
complies
with the first CAUTION
section of these instructions,

in the LOCATION

These fi.u'naces are shipped

materials

proper

furnace

blower

installation,

with the %llowing
These

materials

Installation, Startup, and Operating instructions
Service and Maintenance instructions

Warranty Certificate
Loose Parts Bag includes:
Pressure tube extension

Quantity
1

Collector Box or condensate

to assist in

are shipped

Manual

in the main

compartment,

trap extension

tube

Inducer housing drain tube
1/2-in CPVC street elbow

1
2

Drain tube coupling

Drain tube coupiing grommet

Vent and combustion-air

Condensate

pipe support

trap hole filler plug

Vent and combustion-air
Combustion-air

intake hole filler ptug

pipe perforated

disk assembly

Vent Pipe Extension

* ONLY supplied with some furnaces.

e
¢
o

e
®
o
e
®

This forced air lurnace is equipped for use with natural gas at altitudes 0 - 10.000 ff (0 - 3,050m), except 140 size _rnaces
are only approved for altitudes 0 - 7.000 ft.
(0 - 2,135m).
An accessory kit, supptied by tbe manufacturer,
shall be used to convert to propene gas use or rr_ay be required for some natural gas apptications.
This furnace is for indoor installation in a building constructed
on site. This furnace may be ins"tailed in a manufactiJred
(mobile) home when stated on rating plate and
using factory authorked
kit..
This furnace may be tilstalled on combustible
floodng in alcove or closet at Minimum
Inches Clearance
To Combustible
Construction
as described below.
This furnace requires a special venting system
Refer to the installation instructions for parts list and method of installation. This furnace is for use with schedule-40
PVC.
PVC-DW%L CPVC. or ABS-DWV
pipe, and must not be vented in common
with other gas-tired apptiances.
Construction
tbrough which vent/air intake pipes may be
installed is maximum 24 inches (600 ram), minimum
3/4 inches (19 ram) thickness (including roofing materials)
Cetta fournalse & air puls6 est 6quip6e peur utitisation avec gaz naturel et altitudes compdees
entre 0 - 3.050m (0 - 10,000 pi),except6
queles
sont pour altitudes comprises
entre 0 - 2,135m
0 - 7,000pi).
Ut set une trousse de cenvers on. fourn e par e fabr can, pour passer au gaz propane ou pour certaines
installations au gaz natureL
Cetta fournaise a air puls6 es"t pour installation a Fint6rieur darts un bNiment construit sur place. Cetta fournalse a air pulse peut 6tre install6e
pr6fabdqu6e
(maison mobile) si prescht par la plaque signN6tique
et si r on utitise une trousse specifi6e par le labdcant.
C'etta fournaise peut _tre instati6e sur un plancher combustible
darts un enfoncement
ou un placard en observant
les D_gagement
Minimum
Elements
De Construction
Combustibles,

fournaises

dens

de 140 taille

une maison

En Pouces

Ave¢

Cetta fournaise n6cessite un systeme d'evaoJation
special La m6thede d'installation
et la tiste des pieces n6cessaires
figurent dens les instructions d'instatiation.
Cetle
fournalse doit s'u!itiser avec la tuyautede des nomendatures
40 PVC. PVC-DWV,
CPVC, oN ABS-DVW
et elle ne peut pas 6tre ventil6e conjointment
avec d'autres
appereils a gaz. Epalsseur de la construction
au travers de laquetie il est pcesible de laire passer les tuyaux d'a6ration (admlssion/6vacuation):
24 po ('600 ram)
maximum.
3/4 po (19ram) minimum
(y cornprls la toiture)

For uptiow and downtiow applications, furnace mu_t be installed level, or pitched within 1/2" of level For a
horizontal apptication, the furnace must be pitched minimum 1/4" to maximum of 1/2" forward for proper
draina:je.
See Installation Manual for IMPORTANT
unit supped details on horizontal apptications,

M IN 1/4" TO 1/2" MAX

Pour des appticatises de flux ascendent et descendant.
_ fournaise ddt 8tre install6e de niveau ou indti%,e
pes plus de 1/2" du niveau. Pour une apptication hodzontale, la fournalse doit g,tre inciinde entre minimum
1/4" et maximum 1/2" du nNeau pour le drainage appropd6. En _
d'instatiation en position beCEontale.
consulter les renseignements
tMPORTANTS
sur le support dens le manuel d'instatiation.

HORIZON

NtNINUN iNCHES CLEARANCE TO CONBUSTtBLE CONSTRUCTION
ALL POSITIONS:
Minimum

front clearance

? ? 140 size furnaces
DOWNFLOW POSITIONS:
t

For ir_stallation

24 inches

floors only when

to combustible
installed

Part No, CD5 or CKS, or Coil Casing,

on special

materials,

Cleat_nce

base No, KGASB0201ALL,

arrows

do not change with
furnace onentation

Part No, KCAKC,

POSITIONS:

Line contact
furnace

is permissible

jacket,

and

shown

only between

building

Clearance

120 and 140 size furnaces

joists,

lines formed

studs,

of top and two sides

ne change pas avec
I'odentation de la
gen@aIeur d'air cbaud.

or framing,

is for air inlet and air outlet
require

by intersections

aed

Cette toumaise est approuv¢e pour Iinstallaflon HORIZONTALE
e! la circulaJion d'air VERS LE HAUT et VERS LE BAS

(610mm),

1 inch back clearance

on cembustible

Coil Assembly
HORIZONTAL

for service

require

TNs furnace is approved for UPFLOW, DOWNFLOW
HORIZONTAL instNlations,

TAL

ends.

1 inch bottom

clearance

to combustible

materials,

DEGAGEMENT MINIMUM EN POUCESAVEC _LEMENTS DE CONSTRUCTIONCOMBUSTIBLES
POUR TOUS LES POSITIONS:
Degagen_ent

avant minimum

de 610mm

(24 po ) pour l'entretien,

Pourlesfoumaissede 140taille,1 po (25mm)degagen-entdes n_t@iauxcombustiblseest

requis au-arriere.
POUR LA POSITION COURANT DESCENDANT:
1 Pour Iinstallation
sur le plancher combustible
seulement
quand on utilise la base speciale, piece
n ° KGASB0201ALL,
I'sesemble
serpentin,
piece n° CD5 ou CKS, ou le carter de serpentin,
piece n° KCAKC.
POUR LA POSITION HORIZONTALE:
Le contact
deuxoStes
b4,timent,
§

La distance
d 'air,

n'est pem?is qdentre les ligses forages
par les intersections
de la chemise
de la foumaise
et des selives, des n_ntan%
indiquee

cenceme

I'extr@mit6

Pour Ise foumaises
de 120 et 140 taille
est requis au

CARBON

MONOXIDE

Failure to fbllow
or death.
Casing
when

hole filler
condensate

4. Install

POISONING

this warning

cap must be installed

condensate

trap into
stubs

condensate

TRAP

trap

casing

in loose

until

holes

with

plastic

label on main

furnace

door

collector

box

connections.

drain robe (blue

Tube
plug fi'om LOWER

and white

removed

striped

label).

was connected

collector

box

to condensate

PRESSURE

SWITCH

TUBING

One collector

box pressure
switch

applications.

densate

collector

box drain

connection

to con=

trap.

trap

This

switch

Condensate

Trap Located

Ca3 Connect

LOWER

on Left Side of Casing

collector

box &ain

and white striped label) to condensate
does not need to be cut.

(2.)

Clamp

tube to prevent

Condensate

Trap Located

Ca3 Install

drain

robe

loose

parts

(blue

and white

bag)

any condensate
on Right

coupling
into

collector
label)

in DOVv_TLOW

box

Connect

larger

supplied
piing,

in loose
extending

connection
(c.)

Route

diameter
parts

&ain
bag)

collector

tlap. Tube

Relocate

robes as described

pressure
2. Use

drain

2. Inducer

Determine

(e.)

Connect

(f.)

Clamp

Housing

appropriate

robe

as shown

parts

label)

which

5. Route

inducer
b. Remove
&ain

and

cap

and

clamp

from

LOWER

inducer

housing

drain connection.
discard

robe which

applications.

label on main fhrnace

door

robe (pink label)

attached

robe

collector

(factor-supplied

box pressure

connected

in loose

tube (green

condensate

box pressure robe (green
labeled "collector box."
smaller

diameter

bag) to extend

robe

collector

was previously

tube (pink

t_ap

label)

relief

port

to pressure

(factmT-supplied

box pressure

connected

parts

label) which

to pressure

label) to condensate

robe (pink
switch.
trap relief

appropriate

robe to relief

CONDENSATE

TRAP

length,

cut, and connect

robe.

port connection.
FREEZE

PROTECTION

Tube

fhctoEyoinstalled
housing

box pressure

this extended

6. Determine

leakage.

to the pressure

RIGHT

port connection.

7. Clamp

any condensate

to the condensate

below.

diameter

remaining

loose

Refer
a Remove

smaller

4. Use

in Fig. 9.

and cut.

collector

3. Connect collector
switch connection

for

trap.

robe to prevent
Drain

tube cou°

box drain robe between

length

to condensate

drain

(_tctory°

for the

box pressure

connections

was previously
connection.

robe

was previ=

switch

bag) to extend

trap.

collector

gas valve and inlet housing
(d.)

to &ain
box

to condensate

extended

robe

or HORIZONTAL

fbr proper

ously plugged.
(b.)

connected
be connected

See Fig. 8 or 9 or robe routing

connected

and used

MUST

and

in UPFLOW

collector

was f_ctory

to check

Side of Casing

which

NOTE:

(fhctow-supplied

striped

be disconnected

robe (blue

leakage.

is factory

is installed

port robe. The other

port connection

1. Disconnect
(b.)

tube (pink label)

robe MUST

label)

relief

fbr connection

fbr recommendations

fbr use when furnace

trap relief

robe (green
LOWER

section

TRAP FIELD DRAIN ATTACHMENT
Drain section

condensate

tlap.
c. Connect

Switch Tubing

Refer to Condensate
procedures,

the pressure

clamp and plug into [PPER

&ain robe (blue label) which

(1.)

Refkr to Pressure
procedure
CONDENSATE

fbr proper

fimtory=installed

(d) Clamp robe to prevent any condensate teakage.

filler

TUBING

Box Drain

(c.) Connect robe to condensate trap.

hole by inserting

hole and rotating

parts bag)

See Fig 8 or 9 or robe routing

b. Install

hole

3 Relief Port Tube

to check

a Remove

casing

NOTE:

1. Collector

shelf

Ca.) Route inducer housing drain tube (violet 1abel)
between gas valve and inlet housing behind collector box drain tube

position.

caps (*i_ctory=supplied
CONDENSATE

in blower

in}ury

(b) Determine appropriate length and cut

desired

through

tabs snap into locking
unused

in personal

trap is relocated.

tube connection

5. Fill

(20 Condensate Trap Located on Right Side of Casing

HAZARD

could result

UPPER

was previously

(molded)
connected

to condensate

t_ap.
c Install cap and clamp on UPPER inducer housing
connection
where molded &ain robe was removed.

to Condensate

Step 4--Horizontal
Applications
A horizontal

&ain

Drain

Protection

Left

(Supply-Air

section

for recommenda-

tions and procedures

located

left fhrnace

application

to the right of combustion

and conditioned

air is discharged

Discharge)

is where

and controls
to the left.

fhrnace
section

blower
of' furnace,

PLUG

AUXILIARY

COLLECTOR BOX
DRAIN TUBE
(BLUE AND WHITE STRIPED)

'U" BOX

O
o

CONDENSATE
TRAP

COLLECTOR BOX
TUBE (GREEN)
HOUSING
DRAIN TUBE (VIOLET)

BOX EXTENSION
DRAtNTUBE

BOX
DRAIN TUBE (BLUE)

COLLECTOR BOX
EXTENSION TUBE
DRAIN TUBE COUPLING

COLLECTOR BOX TUBE (PINK)
RELOCATE TUBE BETWEEN BLOWER SHELF AND INDUCER HOUSING FOR
040,060, AND 080 HEATING INPUT FURNACES
A00215

Fig. 10--Horizontal
CONDENSATE

TRAP

The condensate
blower

tlap

as shown

LOCATION

1. Collector

must be removed

shelf location

Left Tube Configuration

and relocated

from

the factor-installed

in selected

application

location

To relocate
location,

condensate

perform

trap

from

3 robes connected

2. Remove

tlap flora blower

3. Install

the

blower

shelf

to desired

casing

large

to condensate
shelf by gently

pushing

tabs inward

shelf

cap (factov-supplied

hole where

in loose

parts

2. Inducer

CARBON

MONOXIDE

POISONING

Failure to _bllow this warning
or death.
Casing
when

hole filler
condensate

4. Install

Housing

condensate

unused

trap

NOTE:
check

into

casing

through casing
position.

condensate

caps (fi_ctory=supplied
CONDENSATE

TRAP

trap
in loose

hole

with

to condensate

Drain

(factoryextend-

trap and cut

leakage.

Tube
LOWER

(molded)

was previously

inducer

connected

inserting
until

inducer

&ain connection

d. (lamp

tabs

plastic

filler

housing

to condensate

housing

smaller

diameter

bag) to extend

TUBING

previously
label on main fl/rnace

appropriate

robe to prevent

door to

b. Route

connections.

length,

robe (violet

label and

to connect

LOWER

bag)

to the condensate

cuL and connect

any condensate

trap.

robe.

leakage.

c. Detem_ine
d. (lamp

robe (factov-supplied

collector

connected

extended

connection

parts

Port Tube

a. Use

parts bag)

&ain extension

in loose

c. Detem_ine

tube

housing

factoryosupplied

3. Relief
holes

clamp

injury

shelf

hole and rotating

casing

See Fig. 10 or tube routing
for proper

in blower

and

any condensate

and discard

b. Use inducer

cap must be installed

was

trap.

in personal

trap is relocated.

connection
stubs
snap into locking
5. Fill

could result

robe

robe (blue label)

drain robe which

HAZARD

which

trap

length

robe to prevent

a. Remove
-9

drain

in loose parts
label)

box &ain robe

Route extended

d. (lamp

tlap was removed.

to condensate

diameter

to appropriate

hole filler

tube (blue

in loose parts bag) to drain robe coupling,

ing collector

trap.

(factory-supplied

box drain

connected

supplied

trap.

bag) into blower

&ain tube coupling

b. Connect

the Ibllowing:

Tube

into collector

previously

1. Remove

and rotating

Install
bag)

in Fig. 2 or 10.

Box Drain

box tube (green
to the condensate

collector

box pressure

on the condensate
appropriate

robe to prevent

length,

in loose
label)
trap.
robe to relief

trap.
cuL and connect

any condensate

parts

which was

leakage.

robe.

port

A 3-IN. MINIMUMCLEARANCE
TO COMBUSTION-AIRINTAKE
IS REQUIRED.

_VENT

INTAKE

A 12-tN. MIN HORIZONTAL PIPE
SECTION tS RECOMMENDED WITH
SHORT
(5 TOEXCESSIVE
8 FT) VENT SYSTEMS
TO REDUCE
CONDENSATE DROPLETS FROM
EXITING THE VENT PIPE.

30-IN. MtN

SHUTOFF
GAS VALVE

ACCESS
OPENING
FOR TRAP
DRAIN

SEDIMENT
TRAP

NOTE:

CONDENSATE
TRAP

LOCAL CODES MAY REQUIRE A DRAIN PAN UNDER THE
FURNACE
AND CONDENSATE
TRAP WHEN A CONDENSING
FURNACE
IS INSTALLED
ABOVE FINISHED CEILINGS.
A96184

Fig. 11--Attic
CONDENSATE
Refer

TRAP

FIELD

to Condensate

Drain

DRAIN
section

Location

and Working

ATTACHMENT
%r

(ONSTRU(T

recommendations

and

(onstruct

procedures
SWIT(H

The LOWER
connected
extended,

collector

rerouted,

NOTE:
check

box pressure
switch

applications.

HORIZONTAL

smaller

3. Route

extended

a. Behind

tube

c. Behind

pressure
CONDENSATE

disconnected,

to the pressure

switch

label on main Nmace

tube

door to

NOTE:
tube (pink label) attached

(factory-supplied
in item

clearances

in loose

motor

parts

in intem_ittent

unit

be installed

The drain

below

See

sloped

connection

furnace

to condensate

to an open drain.

is restricted

to a minimum

of 5 It. (See

8.)

NOTE:

mended

with short (5 to 8 f_) vent systems.

is to reduce

housing.

12-in.

minimum

excessive

pipe.

(See Fig.

Step

5--Horizontal

A horizontal
located

and pressure

length,

FREEZE
Drain

trap MUST

Vent pipe length

Table

bracket.

connection

TRAP

may result

horizontal

condensate

pipe

droplets

section

is recom-

This recommendation
fi'om exiting

the vent

11 or 38.)
Right

(SupplyoAir

Discharge)

Applications

shelf and inducer
motor

inducer

to Condensate

furnace

OPERATE
this caution

nap must also be properly

box pressure

appropriate

NOT

to fbltow

Fig. 5 [br dimensions.

housing.

blower

switch

where all required

operation.

robe:

inducer

d. Between
4. Detem_ine

MUST

MAY

Failure

The condensate

tube disconnected

inducer

b. Between

INIT

below.

diameter

bag) to extend

plat%m_

(See Fig. 3 and 11)

is fhctory

connections.

robe as described

2. Use

label)

applications.

1. Disconnect
collector
pressure switch.

Refkr

This

See Fig. 10 or tube routing

Modify

tube (pink

for use when [_urnace is installed

and then reconnected

LEFT

for proper

PLATFORM

TUBING

to the pressure

in UPFLOW

A WORKING
working

are met

PRESSURE

Platform

cut,

labeled

and conditioned

switch.

and

reconnect

COLLE(TOR

robe

section

application

air is discharged

is where

and controls

furnace
section

blower
of fi/mace,

to the right.

BOX.
MINOR

PROTECTR)N

Protection

right furnace

to the tel} of combustion

Failure

for recommenda°

PROPERTY
to fbllow

DAMAGE

this caution

may result

in minor

property

damage

tions and procedures.

Local

codes may require

condensate

trap

when

application

or over

a drain pan under
a condensing

a finished

ceiling_

entire furnace

fi/rnace

is used

and

in attic

BOX DRAIN TUBE (BLUE)
COLLECTOR BOX TUBE (GREEN)

CAP

BOX EXTENSION TUBE

PLUG

COLLECTOR BOX TUBE (PINK)
BOX RELOCATED HERE

CONDENSATE
TRAP
COLLECTOR
BOX DRAIN TUBE
(BLUE AND WHITE STRIPED)
INDUCER
HOUSING
DRAIN TUBE (VIOLET)
COLLECTOR
EXTENSION

BOX
TUBE

A00214

Fig. 12--Horizontal
NOTE:
current

In (anada,
NSCNGPIC

NOTE:

installations
shall be in accordance
Installation
Codes andor local codes.

The auxilial_- junction

box (J°Box)

opposite
side of _/rnace casing. (See
Connection
section _br J-Box relocation.
CONDENSATE

TRAP

MUST

Fig.

(ONDENSATE

with

NOTE:

be relocated

12.)

Right Tube Configuration

check

See Electrical

See Fig
for proper

1. Collector
a

LOCATION

TRAP TL BING
12 or robe routing

Box Drain

The condensate

tlap

must be removed

shelf location

as shown

and relocated

from

the factor-installed

in selected

application

Remove

b. Install

location

_ctoryoinsta!led

plug from LOWER

To relocate
location,

condensate

perform

condensate
trap

3 tubes

2. Remove

tlap fi'om blower

3. Install

from

the

blower

shelf

to desired

c. Connect

the fbllowing:

1. Remove

and rotating

connected

to condensate

striped
cut.

trap.

shelf by gently

pushing

tabs inward

d. (lamp

trap.

casing

2. Inducer

hole filler

bag) into blower

removed

shelf

cap (factov-supplied

hole where

in loose

collector

box

and plug into UPPER

collector

box

which

connected

parts

LOWER

(ARBON

MONOXIDE

Failure to follow
or death.
Casing
when

this warning

hole filler
condensate

4. Install

POISONING
could result

cap must be installed

trap

into

unused

condensate

caps (_Sctoryosupplied

trap
in loose

hole

shelf

fhctoryoinstalled

with

leakage.

cap

and clamp

from

LOWER

inducer

housing

drain connection.

and discard

UPPER

was previously

until

tube
tabs

(molded)
connected

plastic

filler

inducer

&ain connection

_ Clamp
3. Relief
Refer

to condensate

housing

appropriate

parts

length,

tube (violet

bag)

to connect

to condensate
cuk

and

connect

&ain

label and
LOWER
trap.
robe

trap.

robe to prevent

any condensate

leakage.

Port Tube
to

procedure.

&ain extension

in loose

e. Detem?ine

parts bag)

housing

factory-supplied

condensate
holes

any condensate
Tube

c. Install cap and clamp on UPPER
inducer housing
connection
where molded &ain robe was removed.

hole

inserting

hole and rotating

casing

Drain

housing

d. Use inducer

casing

connection
stubs through casing
snap into locking position.
5. Fill

in3u D'

trap is relocated.

condensate

trap. Tube does not need to be

tlap.

in personal

in blower

box drain robe (blue and white

&ain robe which

HAZARD

was previously

collector

robe to prevent

inducer

label).

to condensate

Housing

a. Remove

tlap was remo_ ed.

striped

tlap.

label)

b. Remove
-->

clamp

&ain tube (blue label)

in Fig. 2 or 12.

door to

Tube

drain robe (blue and white
blower

label on main furnace

connections

Pressure

Switch

Tubing

section

_br connection

(ONDENSATE
TRAP
Ref?r

FIELD

to Condensate

DRAIN

Drain

section

ATTA(HMENT
%r

recommendations

and

procedures
PRESSURE

SWITCH

One collector

box pressure

the pressure

switch

applications.

trap relief

robe (green

port

was

connection

in DOW2qFLOW

check

furnace

be disconnected
fhctory

MUST

connected

or HORIZONTAL

Relocate

tubes as described

2. Use

collector

smaller

A02146

applications.

Fig. 13--Furnace

then

LOCATION

(factory-supplied
to

in loose

robe (green

condensate

box pressure

between

label)

trap

robe behind

inducer

motor

diameter

to extend

was previously

this extended

tube

collector

tube (pink label)

port

(g_ctoryosupplied

TRAP

to Condensate

FREEZE
Drain

Construct

(refkr

platfbrm

to condensate

robe.

for recommendao

Nrnace

be attached

MAY

NOT

to an air distribution

For upflowidownflow

it is level

or pitched

operation.

For horizontal

naaximum

OPERATE

a furnace

may result

and be located
as possible

in intem_ittent

applications

_bnvard

forward

within

meet

as close

Refer to Air

is installed

pitch

to ensure

proper

and terminating

outside

ensure

there

be a negative

room

1/4-in.

so that
hmaace

minimum

condensate

containing

by &lct(s)

tl_e space containing
pressure

the fine, ace.

sealed

to filmace

the fitrnace

condition

Fig

trap MUST

5 £br dimensions.

The

trap must also be properly
NOTE:
Table

Vent

or space.

unit

drain
sloped

below

fire, ace. See

connection

to condensate

UNIT

to an open

&ain

Failure

is restricted

to a n_ininmm

mended

with

is to reduce

12-in.

minimum

horizontal

short (5 to 8 f0 vent systems.
excessive

(See Fig.

condensate

droplets

pipe

of 5 ft. (See

section
exiting

HAZARD

to _bllow this caution
furnace

may result

in a con'osive

sphere Make sure all combustion
nlents are met

is recomo

This recomn_endation
from

DAMAGE

operation.
Do not install

8.)

NOTE:

pipe

pipe length

be installed

the vent

11 or 38)

in intermittent

or contaminated

and circulating

within

operation.
The condensate

&ainage

ducts car_- air circulated

the space

air shall also be handled
not

fhrnace

(See Fig. 13.)

so that supply

to areas outside

will

install

1/2Gin. for proper

applications

casing

equipment

this caution

system
system

heat exchangers.

by the filmace
the return

Failure to follow

lengths

be provided
with ample space fi_r servicing
and cleaning.
Always
comply
with mininmm
fire protection
clearances
shown on the Nrnace clearance4oocombustibles
label.

When

clearances

are met. (See Fig. 3 and 11.)

UNIT

other than

from secondaw

all required

material

CONSIDERATIONS).

be located where available eteca'ic power and gas supplies
specifications
on the furnace rating plate

NOTE:
section

on any combustible

to SAFETY

trap relief

PLATFORM
where

flooring

li2oin,

A WORKING

working

directly

wood

be located so combustion-air
and vent pipe maximun_
are not exceeded. Refkr to Table 8

switch.

tiGriS and procedures.
CONSTRUCT

not be installed

to the center of the distribution
Ducts section

PROTECTION

Protection

from

tube (pink

to pressure

cut, and connect

are protected

to pressure

robe to relief port connection.

CONDENSATE
Refer

length,

components

appropriate

so the electrical

pressure

port connection.

8. (lamp

be installed
water.

inducer

and

box pressure

connected

This furnace must

parts
which

relief

box pressure tube (green label)
labeled COLLECTOR
BOX.
smaller

parts bag)

7. Detem_ine

Location for Proper Condensate
Drainage

door to

tube (pink label) attached

box pressure

collector

remaining
which

robe

connected

4. Connect collector
switch connection

6. Route

RIGHT

belom

collector

motor bracket
switch.

label)

HORIZONTAL

to the pressure

label on main furnace

box pressure

diameter

extended

loose

UPFLOW OR DOWNFLOW

to the condensate

Step l--General

was previously
connection

5. Use

V2" MAX

switch.

bag) to extend

3. Route

for the

box pressure

connections.

1. Disconnect
pressure

in UPFLOW

and used

be connected

See Fig. 12 or robe routing
for proper

connected

is installed

port robe. The other collector

label) which

trap relief

NOTE:

tube (pink label) is fhctory

fbr use when

This robe MUST

condensate

switch

TUBING

unit
atmoo

air require°

_32°F
BACK

MINIMUM INSTALLED

AMBIENT OR FREEZE

A93043

_\\

Fig. 14_Prohibit

Installation

_! PROTECTION REQUIRED

on Back
A93058

--€

UNIT

DAMAGE

HAZARD

Fig. 15--Freeze

This gas fire, ace may be used %r construction
that:

heat provided

-The

all

electrical

ducting

installed

hu'nace

wiring,

is permanently

piping,

according

air

filters,

installed
venting

to these installation

is provided,
outside

sealed

the

space

negative

pressure

blower,

causing

products

to the

instructions.
furnace

containing

A return

casing,

and

the Nrnace.

condition
a flame

with

and

as created

rollout

air duct

tem_inated

This

prevents

by the circulating

and/or

&awing

INJURY

OR DEATH

HAZARD

Failure

to %llow

this warning

could

iajury,

or death

not

install

is controlled

wired" to provide heat
thermostatic
control.

constr_ction
dwwall

by a thermostat.
continuously

combustion

materials.
of furnace

-The temperature
between
sethack

It also prevents

55_T (13%)
or shutdown.

and
The

is under

per our installation

entrainment

of
and

is deemed

rise is within
and the firing

nameplate

plate,
used

cleaned

to clean

process

connect

ambient

Step

ductwork

remove

&ywall

system
-After

components
construction

conditions

rate has been

circulating

be either

venting,

according

and filters are cleaned

on the

must

ignition,

When

or thoroughly

debris tiom

the

burners
to

all HVA(

input rate, temperatt_re

to the manufhcturer's

parallel

with

If dampers

51mace

is in fi/ll-heat

15.)

OR DEATH
protection

is installed

HAZARD

could result in fire

must

be located

must

be located

the floor.

The filrnace

avoid

physical

damage

in a public
a hazardous

in accordance

in a residential

sources

above

having

rise and

exchanger.

or other

to prevent

are manually

to prevent

INJURY

or inadequate

and ignition

installed

by vehicles.

garage,

airplane

atmosphere,

with the NFG(

garage_
at least

the

18 in.

or protected

When

the 141mace is

hangar,

or other building

the fi/rnace

must be installed

or NSCNGPIC.

COMBUSTION

operation

operated,
of either

When

means
chilled

(See Fig. 16.)

AND VENTILATION

used to

they must be

unless

U.S. Ins_alla{ions:

or fi/tl=cool position.

(anadian
Systems
having

combustion,

in accordance

tion and Ventilation
building codes

air tiom

unit

fbr adequate

must he provided

with or on downstleam

in heat

with a f:tmaace, dampers

a means

(See Fig

where

protection

to Cooling

parallel

condensation

flow of air shall be adequate
filrnace.

space

instructions.

Relative

coil must be installed
to avoid

in an unconditioned

or explosion

the

as necessary

location

Provisions

side of furnace

Locations

EXPLOSION,

Improper

Equipment
_he cooling

property

may be 32_>For lower, fieeze

be taken.

3--Hazardous

FIRE,

after construction
is completed.
is complete,
verii}' fhmace
operating

Location

is installed

temperatt_res

AIR FOR
2--Furnace

in minor

[]

set to the

air during

changed

dust and construction

including

may result

to be intem_ittent

prior to occupancy.

-The fi/rnace,

this caution

is maintained

the rated rise range

the

nmst

to [bllow

If this f_/rnace

value.

filters

construction

damper

14.) Safety

Never

instructions.

fm'nace

equipped

Fig.

affected

unit damage.

80°F (27%),
with no evening
use of the filrnace
while the

construction

HAZARD

measures

air to the fhrnace

-The air temperature
rating

the

DAMAGE

Failure

components.

operation

entering

(See

its back.

without

air, which can cause fouling

of the retmn

structure

control

in fire, personal

It may not be "hot

to the structure

[N[T

dust into combustion

plugging

installed

control operation
will be adversely
return-air
ducts to back of fi/rnace.

-Clean omside
air is provided
for combustion.
This is to
minimize the con'osive eff)cts of adhesives,
sealers and other

Step

t'umace

result

into d-_estructure.

-The t\lmace

-The

FIRE,

air

Protection

Section
and

Installations:
and Air Supply
jurisdiction

ventilation,

and dilution

air

with:
8.3 of the NFGC,
applicable

Air for Combuso

provisions

the local

Part 7 of the NS(NGPI(,
Venting
for Appliances
and all authorities

CARBON
The

MONOXIDE

operation

POISONING

exhaust

fans,

clothes &yers, attic exhaust
NEGATIVE
PRESSURE
Make-up

air MUST

addition

to that required

Monoxide

Poisoning

make=up

air is available.

The requirements
whether

18-IN. MINIMUM
TO BURNERS
A93044

Fig. 16--1nstNtation

for the ventilation

by the fl/rnace.

Hazard

instructions

warning

to determine

for combustion

or not the fl/mace

of at least

50 cubic

appliances

installed

1,000

_ms,
create a
furnace.

devices,

in the venting

section

amount

air depend

in a space having
Bmh

to the (arbon

and ventilation
input

rating

upon

a volmne
ibr all gas

in the space.

Spaces having less d-_an 50 cubic
the O[ TDOOR
(OMB[
STION

in a Garage

Refer

if an adequate

is located

feet per

ventilation

fans or fireplaces could
(ONDITION
at the

be provided

of these

HAZARD

kitchen

feet per 1,000 Bmh
AIR METHOD.

require

Spaces having at least 50 cubic feet per 1,000 Btuh may use the
INDOOR
( OMBUSTION
AIR, STANDARD
or KNOWNAIR INFILTRATION
METHOD.
F[ RNA(E

CORROSION

Air _br con_bustion
compounds,
iodide.
shorten

which

include

detergents,

fresheners,

be contaminated

fluoride,

bleaches,

types

Outdoor

halogen

bromide,

and

solvents,

salts,

installations

may require

due to chemical

(ombustion

1. Provide

heat exchangers
and
are found in aerosol

zontal

air

Commercial

Buildings

with

LaundQ-

rooms

Hobby

Chemical

OUT°

Fig. 17 illustrates

indoor

pools

storage

and

for combustion
tion:

air, and outdoor

air may be required

Permanent

wave

Chlorinated

waxes
based

swimming
chemicals

pool

chemicals

Cleaning

solvents
inks, paint

OPEN-

and ventilation

air

to the outdoors.

removers,

and ducts

12" (300
MUST

mm) of

commence

per Fig. 17 and Table

in the space

per Fig.

17 and

varnishes,

the space

etc.

shall commence

within

12" (300 mm) of the

ceiling. Appliances
in the space shall have clearances
of at
least 1" (25 ram) from the sides and back and 6" (150 mm)

acid washing

_br clothes

dQ'ers

fiom

the

front.

with the outdoors

materials

or horizontal
equipment

must

air must

supplied

be provided

with

air fbr Net

to avoid

air fi'om the burner

area and from

The

opening

negative
Indoor
Standard

&aft safeguard

Combustion

duct to the outdoors

directly

Air_)

communicate

through

or spaces

(crawl

a vertical
or attic)

with the outdoors.

NFPA

& AGA

and Known-Air-InfiRration

Indoor air is permitted
%r combustion,
if the Slandard
or Known-Air-InfiRration

opening.

shall

or shall communicate

that fl-eely communicate

pressure in the equipment room or space. A positive seal must be
made between
the Nmace
cabinet
and the returnoair
duct to
pulling

within

TWO OPEND._GS OR VERTI(AL
DUCTS require 1
square inch of flee area per 4,000 Btuh (550 ram2 kW) _br
combined input of all gas appliances in the space per Fig.
17 and Table 1

The opening

_hbric softeners

Sufficient

commence

b. Not tess than the sum of the areas of all vent connectors

(such as perchloroethylene)

acid

fuel=burning

MUST

a. 1 square inch of flee area per 3,000 Btnh (734 n'lnl2ikW)
for combined input of all gas appliances in the space per
Table 1 and

and glues

Antistatic

prevent

OUTDOOR

with

3. ONE OUTDOOR OPENING requires:

tetrachloride
type refrigerants

combustion.

TWO

hori-

comnmnicat-

communicate

combustion

input fi_r all gas appliances
Table 1.

_br eombus°

salts or chemicals

Hydrochloric

All

directly

that freely

congbustion,

pem_anent

c. TWO HORIZONTAL
DUCTS require
1 square inch of
free area per 2,000 Btuh (1,100 mm2ikW)
of combined

not be used

and cleaners

Halogen

Masonry

it should

solutions

sokening

Cements

or spaces

how to provide

b. Size openings

areas
substances,

Printing

or opening(s)

the ceiling and the second
opening
within 12" (300 mm) of the floor.

to the fbllowing

Carbon

using

buildings

or craft rooms,

Deqcing

air %r proper

of flue gases

INGS, one inlet and one outlet

exposures:

If air is exposed

Water

sufficient

duct(s)

ing with the outdoors
the outdoors

a. One opening

Chlorine

with

and dilution

or vertical

openings
°

Air Method

the space

ventilation,

products.

of fl_mace

AIR fbr combustion

chloride,

cleaning

and other household

following

DOOR

not

These elements
could corrode
fhmace life. Air contaminants

sprays,

The

HAZARD

must

Rate

Methods

ventilation,
Method

and dilution,
is used

Table 1--Minimum

Free Area Required

TWO HORIZONTAL
FURNACE
iNPUT

{1 SQ. IN.I2,000 BTUH) {t,100
Free Area of

(BTUH)

for Each Combustion

DUCTS

Opening and Duct

(sq. in.)

Air Opening or Duct to Outdoors

SINGLE DUCT OR OPENING

SO. MMtKW)

TWO OP_=N_NGS OR VI=RTICAL

(1 SQ. IN.t3,000 BTUH) (734 SO. MM/KW)
Free Area of
Round Duct
Opening and Duct
(in. Dia)
(sq In.)
14.7
5

Round Duct
(in. Dia)

DUCTS

{1 SQ. IN.14,000 BTUH) (550 SO. MMiKW)
Free Area of
Round Duct
Opening and Duct
(In. Dia)
(Sq In.)
11
4

44,000

66,000

16.5

88,000

29.3

110,000

36.7

27.5

132,000

154,000

51.3

38.5

EXANPLES:

Determining

FURNACE

Free Area

WATER HEATER

TOTAL

INPUT

t10,000

30,000

(140,000 divided by 4,000)

66,000

40,000

(t06,000

88,000

30,000

(t 18,000 divided by 2,000)

Table 2--Minimum

Space Volumes

35.3 Sq. In. for a Single Duct or Opening
59.0 Sq. tn. for each of two Horizontal Ducts

for 100% Combustion,

OTHER THAN FAN-ASSISTED
ACH

35.0 Sq. In. for each two Vertical Ducts or Openings

divided by 3,000)

TOTAL

[

INPUT
30 {1,000'S I BTUH GAS
40
I RATE)50

Ventilation

and Dilution

FAN-ASSISTED

Air from Outdoors

TOTAL

{1,000'S
BTUH GAS
44
166
I
88
1110 INPUT RATE)
1132
Space Volume (ft s)

1154

0.60

1,050

1,400

1,750

1,100

1,650

2,200

2,750

3,300

3,850

0.50

1,260

1,680

2,100

1,320

1,980

2,640

3,300

3,960

4,620

0.40

1,575

2,100

2,625

1,650

2,475

3,300

4,125

4,950

5,775

0.30

2,100

2,800

3,500

2,200

3,300

4,400

5,500

6,600

7,700

0.20

3,150

4,200

5,250

3,300

4,950

6,600

8,250

9,900

11,550

0.t0
0.00

6,390
NP

8,400
NP

10,500
NP

6,600
NP

9,900
NP

13,200
NP

16,500
NP

19,800
NP

23,100
NP

Table
CARBON

MONOXIDE

Failure to supply
in death and/or
Many

homes

ftlrnace

POISONING

outdoor

require

combustion,

HAZARD

air via grilles

personal

or dncts

air to be supplied

flora

and dilution

has no less volume

of the n_axinmm

installed

in the space

2. The air infiltration
changes

than

input

2. Equal

to or greater

fan-assisted
water

by using the

Gas

appliances,

such

Co&_ A:\%7

a draft

heater:

for

be provided

'Volume

ether

21ft3
ACH
A04002

f)et

per

1,go0
2,

for all gas appliances

For

fan-assisted

rates
required

such

as this

_hrnace:

to be less than 0.40 air

Volume Fan - AOH
15ft3f-

00(_If_,
B-_u/hr

Method

shall be used,

if the

and
than 0.10 ACH

greater

than

volume

the mininmna

appliances

A04003

0.60 ACH

shall

of tl_e space varies

and shall be determined

Determine

than

F_el

and

rate is not known

than 0.40 ACH

ACH

outdoors

per hour (A(H)

1. Less

minimum

ether

were detem_ined

of flue gases.

50 cubic

ratings

The Known Air Infiltration
Rate
infiltration
rate is known to be:

Infiltration

1. For

Volumes

flora the Yationa/
54-2002,&3.2.2:

Method:

1. The space
Btuh

Space

hoodoequipped

The _b.mace combustion
air supply must
accordance
with this instruction
manual.
The Standard

could result

i11iury.

ventilation,

2:Minimum

following
equations
Z223.J-2002/YFP.t

per Table

required

volume

space and add the volumes
together
required volume %r the space.

not be used.

The

with the number

2 or Equations

to get the total

combined
in Bmihr

I_.,,

combined

input

of all other

than

fan-assisted

appli-

1 and 2.

for each appliance

Iom_
ances

input

of all fan-assisted

appliances

in Bm&r

in the
ACH

mininmm

air changes

per hour (ACH

The following requirements
the Known Air Infiltration

shall not exceed

apply to the Standard
Rate Method.

0.60.)

Method

and to

1 SQ IN.
PER4000
BTUH*

TO
OUTDOORS

VENT THROUGH ROOF
CIRCULATING[
DUCTS AIR

_
I

12"MAX

12"
MAX

1 SQ IN.
PER2000
BTUH*

1 SQ IN.
PER
4000
BTUH*

Fco
D
ca
:_
O
o
m
O

o
o

DUCTS
TO
OUTDOORS

INTERIOR
HEATED
SPACE

S
o
1 SQ IN.
PER
4000
BTUH*

UNCONFINED
SPACE

o
a:
m
z

6" MtN
(FRONT)t

o
z<
a:
<:
LU

12 "_

MAX

12"*MAX

1 SQ IN.
PER 1000
BTUH* IN DOOR
ORWALL

1 SQ IN.
PER2000
BTUH
T

1 SQtN.
PER 1000
BTUH* IN DOOR
S ORWALL

o
L12" MAX

CIRCULATING AIR DUCTS

1SQ IN
PER4000
BTUH*

TO
OUTDOORS
*Minimum
NOTE:

dimensions

CIRCULATING AIR DUCTS

of 3 in.

Use any of the following
combinations
of openings:
A&B
C&D
D&E

F&G

* Minimum
minimum

opening size is 100 sq in. with
dimensions of 3 in.

'Minimum

of 3 in when type-B1

vent is used

A03175

A03174

Fig. 17--Air

for Combustion, Ventilation,
for Outdoors

1. Adjoining
a There

rooms

can be considered

are no closable

b. Combining

spaces

doors between

Each

of the total input rating

of all gas appliances

less than

commence
second

100 in. 2 (0.06

within

opening

12" (300

shall commence

the floor. The mininmm
at least

spaces

space

floor

communicating

spaces

nest openings

in doors

2 in.S/l,000

a. Walls and ceilings

shall

ous, sealed
and

in the space,

within

opening
ceiling

floor

levels

and openable

c. Other

openings

around

shall be

floors, between

if connected

Bmh (4,400

levels. The volumes
considered

NOTE:

ef_kct of the louvers,
free

fi'ee area of at least

of total input rating

communicates

*nay be considered

permanent
ventilation
openings
fi'ee area of at least 1-in.2/4,000

3. In spaces

that

louvers

provided

a space
there

that freely

When

directly
to outdoors
having
Bmh of total input rating for

d_e Indoor

or grilles

Air

buildings

with

tight

electrical

have a 60 percent

and gas lines,

is unknown,

Louvers

construction,

additional

using
the methods
described
Air Method section.

etc.

the blocking

must be considered.

If the

it may

fi'ee area, and metal

fi'ee area. Screens,

than 1i4oin. mesh.

and

wal! panels,

of an opening,

design

joints

sole plates

between

have a 20 percent

so they cannot

combustion

between

joints,

and

include

when used,

and grilles must be

be closed.

air ducts

are used,

they nmst

be of the same

cross sectional area as d-*eflee area of the openings to which they
connect. The minimum dimension
of ducts must not be less than 3

Method,

should be adequate to provide air for combustiom
ventilation
and diludon of flue gases. However,
in
unusually

louvers

These

in. (80mm).
Combustion

infiltration
permanent

MUST
be provided
Outdoor
Combustion

that wood

or sealed

are weatherstripped

and screens

or grille

have a continu_

are gasketed

or sealed.

the fi'ee area

grilles,

of a louver

constructed

are adequate

in the space.
use

area

must not be smaller

wit}* the outdoors

all gas appliances

In detem_ining

assumed

all gas appliances.
2. An attic or crawlspace

fbr plumbing,

by one or more permao

or floors having
ramS&W)

to the outdoors

and door frames,
wall-ceiling

and Dilution

Openings

windows

are caulked

window

penetrations

shall

exposed

b. Doors

is defined

bare'let.

shall

12" (300 ram)

of air openings

vapor

and the

(See Fig. 18.)

on dif£)rent

different

of the

dimension

3 in. (80 ram).

c. Combining

nrm)

opening

Bmh (2,000 mm2&W)
m 2) One

for Combustion, Ventilation,
from Indoors

L nusually tight construction
( onstr_/ction with:

rooms.

on same floor level
1 in.2/1,000

not

Fig. 18--Air

part of a space ik

have free area of at least
but

and Ditution

Combination

of Indoor

and

Outdoor

1. [ndoor openings
shall compy
Air Method below and,

air

2. Outdoor

in the

openings

Combustion

with

shall be located

Air Method

mentioned

Air
the Indoor

as required
previously

Combustion

in the Outdoor
and,

3. Outdoor

openings

a. (alculate

shall be sized

the Ratio

required
below.

volume

fbr Indoor

Space

volume

(ombustion

divided
Air

3. (onstruct
20.

Method

plenum

4. If downflow

to dimensions

subbase

(KGASB)

specified

in Table

is used,

install

1 and Fig.

as shown

Fig. 2!.

b. Outdoor
opening
size
Ratio in a. above.
c. Minimum

size

required

rednction

Factor

1 minus

the

If (oil

Assembly

KCAKC

Outdoor

in Outdoor

openings

Combus{ion

multiplied

by reduction

dimension

of air openings

111111)

as %llows:

of all Indoor

Factor

shall
Air

the

Method

in b. above.

size

NOTE:

above

Remove

they interfere

The mininlnnl

To remove

shall be not tess than 3 in. (80

install

t:umace

flanges

perforated,

or dtlct flange

it breaks

as shown

perR_rated,

with mating
fi/rnace

duct pliers

Part No. CD5 or CK5 or Coil Box Part No

is used,

off_ Be carefld

in Fig. 22.
discharge

duct flanges

on coil on downflow

discharge

tool to bend
of sharp

duct

flange

edges.

when

subbase.

flange,

use wide

back and forth until

(See Fig. 23.)

BNSTALLATION
Step

l--Leveling

When furnace

Legs

(If Desired)

is used in opflow

position

with side inlet(s),

leveling

UNIT

legs may be desired.
(See
Fig.
19.) Install
field-supplied,
corrosion-resistant
5/16-im machine bolts and nuts.
NOTE:

The nlaximmll

1. Position

flmaace

diameter
Holes

length
on

in hole.

(Install

corner

not exceed
and

drill

of furnace.

could result

in intermittent

unit

1- 1/2 in.

Do not bend

a 5/16=in.

will affect

(See Fig. 19.)

cycling

locations.

duct flanges

airflow

or premature

flange
shown

inward

as shown

across heat exchangers

completely
in Fig, 23

heat

or bend

in Fig

This

arid may cause limit

exchanger

fifilure.

it inward

a nlininlnm

Remove

duct

of 2!0 ° as

if desired.)

nut on other side of fl/mace

outside nut to provide

nut to secure

base.

(Install

Step

flat

desired

height,

and tighten

3--hstaHation

in Horizontal

Applications

inside
tNIT

arrangement.

NOTE:
Bottom closure must be used when leveling
See Bottom Closure Panel section
2--_nstaHation

in Upfiow

and

legs are used

NOTE:
For downflow
applications,
use on combustible
flooring when
manufacturer)
not required

Part No. KGASB0201ALL
when

dlis fhmace

Part No. CD5 or CK5,

1. Determine
2. (onstruct

application

being

hole in floor per

is used.

is installed

is approved
for
(available
fl'om
Special

or (;oil Box Part No. KCAKC

from Table

dimensions

specified

draining.

When

and Fig. 20.

Step

flmlace

suspended,
shelf

When

in intermittent

MUST

in a horizontal

or pad should

position

bottom

brace

supported

when

to ensure

proper

supports

unit is supported

support

unit

sides

and

fi'om file ground,

sides and center

blower

shelf

4-==Air Ducts

GENERAL
The

REQUIREMENTS

duct

system

accepted

American

Society- of Heating,

Engineers

(ASHRAE)

duct system
CFM

a furnace

circulated
Nrnace,

Secure

ductwork
supply°

approved

casing

tape

(ACCA),

Sheet

by:

Air

Metal

arid

(SMACNA)

and Air Conditioning

The Ai_' 5)',slems DesNr_ Gzddelocal

the required

distributor.
system

The
design

pressure.

is installed

the remm

according

published

Association

fi'om your

be sized to handle
static

sized

those

Refrigerating

available

by the furnace

the furnace
furnace

Seal

should

and

National

or consult

tables

at the design

When

designed
such

Association

ContIactors

[i_ves refkrence

Legs

standards

Contractors

Air Conditioning

A89014

should

national

Conditioning

Fig, 19--Leve{ing

may result

These furnaces can be installed horizontally in either horizontal
left or right discharge position. In a crawlspace, fmnace can either
be hung from floor joist or installed on suitable blocks or pad.
Furnace can be suspended flora each corner by hanger bolts and
angle iron supports. (See Fig. 24.) (Jut hanger bolts (4 each 3i8=im
all=thread rod) to desired length. Use 1 X 3i8=im flat washers.
3/%in. lockwashers, and 3/8=in. nuts on hanger rods as shown in
Fig. 24. Dimples are provided for hole locations. (See Fig. 2.)

3.
in Table

is used

blocks
area.

(?oil

OPERATE
tllis caution

length

furnace

center blower

base in

on manufacturer's

installed

NOT

to %llow

operation.
The entire

Downflow

this fhrnace
special base

MAY

Failure

Applications

Assenlbly
used,

OPERATE

this caution

if desired.)

4. Adjust

Step

NOT

to follow

operation.

nut on bolt and then install bolt and nut

flat washer

another

Locate

closure panel may be used as guide

2. For each hole. install

washer

of bolt should
back.

hole in each bottom

in bottom

3. Install

its

MAY

Failure

so that the

to areas outside

supply

air shall also be handled
and temlinating

with proper

and return-duct
or duct sealer.

outside

fasteners

ducts

caia T air

_he space containing
by a duct(s)

the space containing

for type of ductwork

connections

to furnace

the

sealed

with

to
the

used.
code

A96283

Fig. 20--Floor

and Plenum Opening

Dimensions
FURNACE
CD5 OR CK5
COIL ASSEMBLY
OR KCAKC
COIL BOX

FLOORING

SUBBASE

SHEET METAL
PLENUM

PLENUM
FLOOR -OPENING

FLOOR
OPENING

A96284
A96285

Fig. 22--Furnace,
Plenum, and CoN
Assembly or Coil Box Installed
on a Combustible
Floor

Fig. 21--Furnace_ Plenum, and Subbase
Installed on a Combustible Floor
Table 3--Opening
FURNACE
CASING
WIDTH

Dimensions

(In.)
PLENUM OPENING

Upflow Applications
Downflow Applications
t7ot/2

Flooring

24-1/8

16-5/8

24-3/4

15-7/8

16-1/2

19-5/8
20-3/8

15-1/8

16-3/4

Downflow Applications on Combustible Ftooring NOT Using KGASB Subbase
Furnace with CD5 or CK5 Coil Assembly or KCAKC Coil Box

15-1/2

16-1/2

Upflow Applications

19-1/2

24-1/8

20-1/8

24-3/4

19-3/8

19-5/8

18-5/8

20-1/4

20-8/8

on Non-Combustible

Flooring

Downflow Applications on Combustible Ftooring Using KGASB Subbase
Furnace with or without CD5 or CK5 Coil Assembly or KCAKC Coil Box
Downflow Applications on Combustible Ftooring NOT Using KGASB Subbase
Furnace with CD5 or CK5 Coil Assembly or KCAKC Coil Box

Upflow Applications

24-1/8

23-5/8

24-3/4

22W/8

23-1/2

19-5/8

Downflow Applications on Combustible Ftooring Using KGASB Subbase
Furnace with or without CD5 or CK5 Coil Assembty or KCAKC Coil Box

22-1/8

23-3/4

20-3/8

Downflow Applications on Combustible Ftooring NOT Using KGASB Subbase
Furnace with CD5 or CK5 Coil Assembly or KCAKC Coil Box

22-1/2

23-1/2

Downflow Applications
24ott2

on Non-Combustible

A
16

Downflow Applications on Combustible Ftooring Using KGASB Subbase
Furnace with or without CD5 or CK5 Coil Assembty or KCAKC Coil Box

Downflow Applications
21

FLOOR OPENING

APPLICATION

on Non-Combustible

Flooring

Horizontal
DISCHARGE
FLANGE

Furnaces

(onnect

DUCT

supply-air

supply-air
NO

&ct

to supply

duct attachment

supply/outlet

must

air opening

ONLY

or air conditioning

on ftm_ace

be connected

coil casing

The

to ftmaace

(when used)

DO NOT

cut main f_rnace casing to attach supply side air duct, humidifier,
or other accessories.
All accessories
MUST be connected
external
to fhrnace

main casing.

RETETRN AIR (ONNECTIONS
YES

The

t:t_rnace

installed
I

210 °
MIN

a£f_ct another

of combustion

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

another

_;,/rnace to prevent
through

transmission

unconditioned

system
barrier

perforn_ance.
When
is recommended.

Maintain

a l-in. clearance

ductwork

fbr a distance

NFPA

90B or local

For a fhmace

between

of vibration

space

should
air

ductwork

conditioning

FIRE

and

A failure

is use&

a vapor

Jr{jury, or death
Never connect return-air

to supply

upflow

air

fiom the t_urnace. See

Upflow
The

coil, the outlet

duct shall

light

assistance

stream.

can be viewed

or a probe

The cover

%r possible

can be inserted

attachment

openings

for sampling

shall prevent

using

Metal

ACOUSTICAL

duct systems

of main

&ct

the air

TREATMENT

branch

rake-off

elbow

may

construction

acoustical

lining

90B as tested
SUPPLY

standard

and fibrous

fibrous

ductwork

by UL Standard

181%r

glass

ducts

shall

comply

with NFPA

(lass

1 Rigid

air ducts.
--9

Furnaces

Connect

supply-air

duct

to 3/4-in

flange

on _hrnace

supply-air

outlet. The supply-air
duct attachment
must ONLY be connected
to fbrnace supply-/outlet-air
duct flanges or air conditioning
coil
casing

(when

used)

DO NOT

supply

side air duct,

humidifier,

ries MUST

be connected

Downflow

Furnaces

(onnect

supply-air

cut main

fhmace

casing

or other accessories.

external

to ft_rnace main

duct attachment

to supply-air
must

opening

ONLY

nected

material,

supply-air

to an accesso_-

duct attachment
subbase

nmst

be connected

external

to fi/rnace

main

in fire, personal

to the back

of the t'umace

side(s)

pem_itted

to bottom,

sides

duct must

be connected

(left

air portion

any portion

of return-air

and Horizontal

return-air

duct

of the furnace

casing.

DO NOT

duct to back of furnace

casing.

Furnaces

must

connected

to return-air

opening

as shown in Fig. 2 DO NOT cut into casing sides or back
any portion of return-air
duct Bypass humidifier connecbe made

5--FHter

at ductwork

or coil casing

sides exterior

Arrangement

FIRE, CARBON
HAZARD

MONOXIDE

Failure

to %11ow this warning

injury,

or death

Never

operate

unit

without

AND POISONING
could

a filter

result

in fire, personal

or with

blower

access

to attach

casing

be connected

or _i_ctory approved

could result

All accessoFactory-supplied

ONLY

washable
Determine

framed
location

filters
%r

are shipped

filter

to t'umace

location,
location

be con-

air conditionto attach supply
All accessories

casing.

and quantity-

shipped

and size of bottom

with

this _hmace.

and side return-air

in blower

and relocate

retaining wire if necessaDSee Table 4 to determine
size %r desired
filter location.
Table 4 indicates

on t_urnace. The

ing coil casing. DO NOT cut main fhmace casing
side air duct, humidifier,
or other accessories.
MUST

is in

panel removed.

supply/outlet
or air conditioning
coil casing (when used), when
installed on non-comhustible
material. When installed on comhustible

in the

on ducts

only

side remm

comparm_ent
duct

air plenum

on ftm_ace

connect

Step

Both

AIR (ONNECTIONS

L pflow

type, shall be

an opening

or a combination
of bottom and side(s) of main furnace
as shown in Fig 2 Bypass humidifier
may be attached into

tions should
ft_rnace

internal

acoustical lining As an ahernative,
fibrous ductwork may be used
if constructed
and installed in accordance
with the latest edition of
SMACNA

applications

return-air

provided
to attach

and 10 fi

require

ducts

duct connections

Downflow

leaks.

that do not have a 90 degree

to the first

to %11ow this warning

unused

The

DU(TWORK

not of the direct-vent
or panel covering

with

Furnaces

right),
casing

be provided with a removable
access panel. This opening shall be
accessible when the ft,.mace is installed and shall be of such a size
that the heat exchanger

fan

communicating

HAZARD

passing

materials

with a cooling

fan

or act to mix products

air, and that the air circulating

or in a return

enhance

code fbr _hrther requirements.

not equipped

and

position.

Return-air

of 36 in. horizontally

air supply

appliance

Ductwork
insulated

fi'om comhustible

designed

A93029

Flanges
used

by the air circulating

in an enclosure

any door

fan compartment

the closed

if installed

only when

ft_rnace

should

shall

created

appliance's

fhel-burning

operable

connections

air system

pressure

with circulating

of the fhrnace,
YES

Flexible

its remm

cannot

Fig. 23--Duct

and

so that negative

correct
filter

filter
filter
size,

See Fig. 2 for

openings.

A3-1N MINIMUM
CLEARANCE TO

INTAKE

IS REQUIRED

3/8-1 N. ROD

ANGLE
--_
IRON OR
EQUIVALENT

ALTERNATE SUPPORT
LOCATION 4-IN MIN
8-IN MAX

"_
(B)
(A)

(B)

(A)

ROD LOCATION
USING
DIMPLE
LOCATORS
tSEE
DWG

3/8-1N

DIMENSIONAL
FOR

LOCATIONS)

NOTES:

(A) PREFERRED

ROD

(B) ALTERNATE

13/16-1N. MAX
ALTERNATE SUPPORT
LOCATION FROM BACK

(B)

& WASHER
(4)
REQD
PER ROD

ROD

1 A 1 In. clearance minimum between top of
furnace and combustibIe material.
2 The entire length of furnace must be
supported when furnace is used in
horizontal position to ensure proper
drainage.
3 Bottom side combustion-air entry cannot
be used when furnace is installed with
hangers as shown

LOCATION
LOCATION

A96209

Fig. 24_Crawlspace
TaNe 4--Filter
FURNACE
CASING
W{DTN (IN.}

FILTER

SIZE (IN.l*

(1)16X25X1

24_1/2

FILTER

Bottom Return

(1) 16 X 25 X 11-

(1 or 2 / 16 X 25 X 1

WASHABLE
FILTER \

TYPE

FRAMED

(1) 16 X 25 X 11-

Cleanable

(1)20 X 25 X It

C_eanab_e

(1 / 24 X 25 X 11-

* Filters can be field modified by cutting to the desired
can be ordered from your distributor or dealer
? Factory-provided with furnace.

(UT

Application

information

Side Return

17-1t2

HorizontN

C_eanable

RETAINER
SPRING

size. Alternate sizes

HAZARD

Failure

to %llow

this caution

may result

in minor

personal
A00217

injury
Use care when cutting

support

rods in filters to protect

against

flying pieces and sharp rod ends. Wear safety glasses,
and appropriate
protective
clothing.

gloves,
Bottom

Fig. 25--Filter

Installed

return-air

may

opening

be used

Filter may need to be cut to fit some
as shown
UNIT

MAY

Failure

NOT

OPERATE

to fk_llow this caution

may result

in intem_ittent

unit

operation.
For airflow

requirements

above

1800 CFM,

openings

or the bottom
for airflow

see Air Deliveo-

only will ensm'e adequate

requirements

above

remm

Step

6--Bottom

These

_i/rnaces

To remove

Cmosure
are shipped

bottom

closure

1. Tilt or raise furnace

air

panel.

1800 CFM.

2. Rotate

NOTE: Side returnoair openings can ONLY be used in 1_PFLOW
configurations, Install _ter(s) as shown in Fig, 25,

3. Remove

with

all 4 orientations.

I:tmaace widths

Install

filter

26.

in bottom return-air
opening.
side return air is used.

table in Product Data literature
for specific use of single side
inlets. The use of both side inlets, a combination
of 1 side and
the bottom,

in Fig

for Side Inlet

Panel
with bottom

enclosure

This panel MUST

panel,

perfbm_

and remove

panel installed
be in place

when

the following:

2 screws holding

fiont filler

(See Fig. 27.)
fiont

filler panel

bottom

closure

downward
panel.

to release

holding

tabs.

21-IN.WIDE
CASINGS ONLY:
SUPPORT RODS (3)
EXTEND 1/4" ON EACH
SIDE OF FILTER AND
REST ON CASING FLANGE

171/2oIN.WIDE
CASINGS ONLY:
INSTALL FELD-SUPPLIED
FILTER FILLER STRIP
UNDER FILTER.

PI(

and all authorities

having jurisdiction.

Gas supply

line should

be a separate
line running
directly
fi'om meter to t:urnace, if
possible. Refer to Table 5 fbr recommended
gas pipe sizing. Risers
mnst be used to connect

to fhrnace

piping

with appropriate

hanger

ever?" 6 ft. Joint compound

sparingly

and only

resistant

to propane

FIRE

stlaps,

to male

and to meter.

hangers,

(pipe dope)

should

of joints.

Pipe dope

threads

all gas
of 1

be applied
must

gas.

OR EXPLOSION

HAZARD

Failure

to %llow

personal

ir!iury,

-Connect

gas pipe to t:m'nace using a backup

damaging

Support

etc. l_se a minimum

this warning

could

result in fire, explosion,

or death
wrench

to avoid

gas controls

-Gas vah'e

shutoff

switch

MUST

be thcing

_:bp,vard or tilted

upward.
-Never

purge

a gas line into

test tbr gas leaks with

a combustion

an open

flame.

available soap solution made specifically
leaks to cheek all connections.

• WASHABLE
FILTER

-Use proper
manit'old,

length

-It" a flexible

connector

having

jurisdiction,

fl/rnace

gas valve

flul_ace

casing.

Install

a sediment

installed

FILTER
SUPPORT

in riser
a tee

section

manifold

If local codes

FILTER
RETAINER

always

iron

and extend

end of tee

leading

Trap

gas shutoff

a capped

extend

union

valve

can be

to fimaace

should

joint

outside

Then connect

nipple

a ground

another

installed

of 2 in

to flmaace

the use of a flexible

served

by authori w

a n_ininmm

use a new listed connector.

has previously

shall

to riser

on gas control

or allowed
pipe

Capped

Place

and manual

allow

stress

leading

Never

a commercially

for the detection

of tee is vertical.

of gas controls.

control

is required
black

trap

into lower

level

to avoid

connecting

straight-through
nipple

of pipe

chamber.

Use

below

between

gas

(See Fig. 28)

gas appliance

connector,

Do not use a connector

which

gas appliance.

A00290

Fig. 26--Bottom

Filter

Arrangement
FIRE

4, Reinstall fiont filler panel and screws
Step

7--Gas

Piping

Gas piping must be installed in accordance
with national and local
codes
Refer to current edition of NFGC in the United States
Canadian

installations

must be made in accordance

OR EXPLOSION

Failure

to %llow

serious

injury,

death

test £_r gas leaks with

cially

available

An accessible
flul_ace

plugged

soap
causing

manual
casing

tapping,

shutoff

made

property

NOMINAL
IRON
PIPE
SIZE

result

Use a commer-

tbr test gauge

personal

be installed

the

injury

external

A 1iS=in

connection,

Capacity

£_r

A fire or explo=

6 fi of furnace

NPT

MUST

of Pipe*

LENGTH OF PiPE (F7)

INTERNAL
DIAMETER
{BN.)

damage,

valve MLST

Table 5--Maximum
i

could

specifically

all connections.

and within
accessible

exactly

damage.

an open flame.

solution

of leaks to check

sion could result
toss of lit).

the

or property

Never

detection

with NSCNG°

HAZARD

the safety warnings

(BN.)
BOTTOM
CLOSURE
PANEL
FRONT
PANEL

FILLER

Bottom

Closure

0.622

175

120

314

0.824

360

250

200

170

151

1.049

680

465

375

320

285

1-114

1.380

1400

950

770

660

580

1-tl2

1.610

2100

1460

1180

990

900

* Cubic fl of gas per hr for gas pressures of 05 psig (14-in. wc) or less, and
a pressure drop of 05qn. wc (based on a 060 specific gravity gas).
Ref: Table 12-2 NFPA 54-2002.

A93047

Fig. 2g--Removing

tl2

Pane{
22

Step 8--Electrical
GAS A
SUPPLY
MANUAL J

See Fig 30 £;orfield wiring diagram showing typical field 115=v
and 24-v wiring Check all _hctory and field electrical connections
for tighmess

V A" J

Connections

Field=supplied wiring shall conform with the limitations of 63_T
(35°C) rise

ELECTRICAL
Failure
death.

SHOCK

HAZARD

to follow this warning

Blower

access

control

center.

panel

bypass

or close

could result

door

switch

No component

in serious

opens

operation

switch with panel

injury or

l l5-v
can

power

occur

Do not

removed.

A93324

Fig, 28--Typical

Gas Pipe Arrangement

F[ RNACE
Failure

installed
immediately
ftm_ace and downstleam
NOTE:

upstream
of gas supply
of manual shutoff valve.

The gas valve inlet pressure

use as test gauge
exceed

connection

maxin_um

0.5 psig

tap connection

providing
(14-in.

connection

is suitable

test pressure

wc)

stated

DOES

on gas valve.

NFGC

in the United

national

be pressure

plumbing

connected.
check

After

States
and

and

exceeds

leak

gas codes

at furnace

tested

or NSCNGPI(

all connections

for leakage

If pressure

in accordance
in Canada,

bei:ore

the t_urnace

have been made,

prior to operating

purge

and water

Furnace

control

electric
manual

shutoff
shutoff

gas

switch located on furnace
valve before test.

supply

pressure

shall

local, and

rating plate

has been

supply

lines and

Refkr to rating
cations

minimum
inlet supply pressures
marked
the f£maace burners ON and OFF.

on the rating

plate

all

Electrical

040-08
040-12

OPERATING
VOLTAGE RANGE[

operation

cold weather

_br proper

operation

and
with

Max*

Min*

MAX
UNIT
AMPS

115--60--1

127

104

115--60--1

127

104

060-08

115--60--1

127

06042

115--60--1

08048

make

to handle

toad

or Table

6 for equipment

plate

(NEC)

connections
ANSI

provided

imposed

NFPA

certain

to that specified

check to be sure that service

electrical
Code

connections,

correspond

by this

by power

electrical

accordance
70°2002

that

on unit

equipment.

with

specifiNational

and any local codes

(7ode CSA

C22.1

or authorities

having

jurisdiction.

Use a separate, filsed branch electrical circuit containing
sized Nse or circuit breaker [br this furnace. See Table
size

Table 6--ElectricN
VOLTS-HERTZ-PHASE

in furnace

during

or ordinances
that might apply For (anadian
installations,
all
electrical connections
must be made in accordance
with Canadian

and

located

UNIT
SIZE

Also,

electrical

and phase

is sufficient

Make

pipe nmst be

n_axinmm

may result

fi'eezing

be grounded

with

fi'equency,

Electrical
the

must

proceeding

voltage,

with

gas valve and accessible

within

pipes

115°V WIRING

(See

furnace.

0.5 psig (14oin. wc), gas supply

OPERATE

NOT

disconnected
fiom _i_rnace and capped be_bre pressure test. If test
pressure
is equal to or less than 0.5 psig (14=in. wc), turn off

The

stopping

Befbre
should

NOT

contlol
will
lock
out
(ontrol
is grounded
through
green yellow wire routed to gas valve and burner box screw

Fig. 460
Piping

MAY

to _bllow this caution

fuse

within

specifications.
sight fiom

A disconnecting

and readily

accessible

means

must

to Nmace.

Data

AMPACBTY?

MBN
WIRE
SRZE

6.1

8.4

7.3

10.0

104

6.1

8.4

127

104

7.1

9.8

115--60--1

127

104

9.5

12.8

08042

115--60--1

127

104

7.6

10.4

08048

115--60--1

127

104

10.0

13.4

080-20

115--60--1

127

104

14.1

18.4

10048

115--60--1

127

104

10.2

13.5

tOO-20

115--60--1

127

104

14.8

19.3

120-20

115--60--1

127

104

14.6

19.1

UNiT

MAX WRRE
LENGTH

{FT)_

* Permissible limits of voltage range at which unit will operate satisfactorily.
t Unit ampacity = 125 percent of largest operating component's fu{I load amps plus 100 percent of all other potential operating components'
load amps
$ Length shown is as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.
** Time-delay type is recommended.

a properly
6 for wire

MAX FUSE OR
CKT BKR AMPS**

(EAC, humidifier,

etc.) full

Table 7--Approved Combustion-Air
ASTM SPECBFJOATION
(MARKED

ON MATER_AL)
D1527

MATERIAL

PiPE

ABS

Pipe

PVC

Pipe

D1788

FITTINGS

and Vent Pipe, Fitting and Cement Materials

SOLVENT

CEMENT AND PRBMI=RS

DESCRIPTBON
Schedule-40
Schedule-40

Solvent
Cement

D2235

For ABS

D2241

PVC

Pipe

SDR-21 & SDR-26

D2466

PVC

Fittings

Schedule-40

D2468

ABS

Fittings

Schedule-40
Solvent
Cement

D2564

For PVC

D2881

ABS

Pipe

Fittings

For PVC
DWV at Schedule-40

D2665

PVC

Pipe

Fittings

DWV

F438

CPVC

Fittings

Schedule-40

F441

CPVC

Pipe

Schedule-40

F442

CPVC

Pipe

F493

For CPVC

F628

ABS
For PVC

Pipe
--

---

F891

PVC

Pipe

NOTE:

Proper

polarity

is incorrect,

flash rapidly

polarity

must

control

be maintained
center

fault

and Alrnace will NOT

SDR
Solvent
Cement

F656

For CPVC
Cellular Core DWV at Schedule-40

Primer

Cettular Core Schedule-40

for 115-v wiring

code indicator

If
ELECTRICAL

operate.

HAZARD

select

to %11ow this warning

death, or property damage.
Do not connect aluminum
and furnace.

could

wire

Use only copper

result

between

& DWV

light will
to follow

SHOCK

AND FIRE

this warning

death, or property damage,
If manual disconnect
switch
Failure

IPS sizes

For PVC

Failure

FIRE

tPS sizes

in serious

injury,

disconnect

a location

electrical

where

HAZARD

may result

in serious

is to be mounted

a drill

or fhstener

will

inju W,

furnace,

not

contact

or gas components.

24-V WIRING

switch

Make field 24-v thermostat connections at 24-v terminal block on
fm'nace control For proper cooling operation, Y wire from
thermostat MUST be connected to ¥ terminal on filrnace connol,
as shown in Fig. 30. The 24=v terminal block is marked fbr easy
connection of field wiring. (See Fig. 320 The 24=v circuit contains
a 3=amp, automotive4ype fuse located on fi/mace control. (See
Fig. 33.) Any electrical shorts of 24-v wiring during installation,
service, or maintenance may cause lime to blow. If filse replacemerit is required, use only a time of identical size (3 amp) and type.
The control will flash code 24 when fuse needs replacement.

wire. (See Fig. 29.)

ELECTRIC
DISCONNECT
SWITCH

NOTE: Use AWG No. 18 color-coded copper thermostat wire fbr
lengths up to 100 it. For wire lengths over 100 ft, use AWG No.
16 wire.

A93033

A( CESSORIES

Fig. 29--Disconnect

ELECTRICAL

SHOCK

Failure

to fbllow

death,

or property
to NEC

trical (7ode CSA
injury

FIRE
could

and Furnace

l. Electronic Air Cleaner (EAC)
Two quick-connect terminals marked EAC-I and EAC°2 are
provided for EAC connection. (See Fig 33) These terminals
are energized with 115v (1 0-amp maximum) during blower
motor operation.

HAZARD
result

in serious

inju W,

damage.
have an unintemlpted
ANSI
C22.1

if an electrical

NFPA

70-2002

or local codes

fimlt should

electrical

wire or conduit

installed

in accordance

use gas piping

AND

this warning

The cabinet MUST
according

Switch

or unbroken
and Canadian
to minimize

for electrical

with existing

electrical

as an electrical

Elec=

personal

occur. This may consist

approved

ground
codes.

NOTE: DO NOT connect f:urnace control HI_M tem_inal to HUM
(humidifier) terminal on Thermidistat-f_L Zone Controller or simitar device See Thermidistat TM, Zone Controller, thermostat, or
controller manufi_cturer's instructions fbr proper connection.

ground

when
Do not

ground.

J-Box Relocation
1. Remove 2 screws holding auxiliaQ' J-box. (See Fig 31.)
2. Rotate J=box 180 ° and attach box to leit side, using holes
provided.

Table 8--Maximum
ALTITUDE

UNiT SRZE

1-1/2

060-08
036060
060-16

1-1/2

080-12
080-16
080-20

1-1/2

NA
2O

120-20

2001 to 3000

ALTITUDE

3001 to 4000

ALTITUDE

4001 to 5000t

NUMBER OF 90 ° ELBOWS
2

100-16
100-20

ALTITUDE

Vent Pipe Length (Ft)
1

040-08
040-12

0 to 2000

Allowable

VENT PIPE
DIAMETER

(IN.)

2-1/2

NUMBER OF 00 ° ELBOWS

VENT PIP _=
DIAMETER (iN.)

040-08
040-12

1-1/2

060-08
036060
060-16

1-1/2

080-12
080-16
080-20

2-1/2

100-16
100-20

2-1/2

120-20

UNiT SBZE

UNiT SRZE

NUMBER

VENT PIPE

OF 00° ELBOWS

040-08
040-12

1-1/2

060-08
036060
060-16

1-1/2

080-12
080-16
080-20

DIAMETER

(iN.)

2-1/2

100-16
100-20

2-1/2

120-20

UNiT SBZE

NUMBER

VENT PIPE
I

040-08
040-12

1-1/2

060-08
036060
060-16

1-1/2

080-I2
080-16
080-20

DIAMETER

(iN.)

OF 00° ELBOWS

2-1/2

100-16
100-20

2-1/2

120-20

* Wide radius elbow
? Vent sizing for Canadian installations over 4500 ft (1370 m) above sea level are subject to acceptance by the local authorities having jurisdiction.
NA--Not Allowed; pressure switch will not make
NOTES:
1. Do not use pipe size greater than those specified in table or incomplete combustion, flame disturbance, or flame sense lockout may occur.
2. Assume two 45 ° elbows equal one 90 ° elbow Long radius elbows are desirable and may be required in some cases
3. Elbows and pipe sections within the furnace casing and at the vent termination should not be included in vent length or elbow count.
4. The minimum pipe length is 5 fl for all applications

Table8--1Vlaxirnum
AllowableVent PipeLength(Ft) Continued
ALTITUDE

500t to 6000t

ALTITUDE

600t to 7000t

ALTITUDE

UNiT SiZE

ALTITUDE

040-08
040-12

1-1/2

060-08
036060
060-16

1-1/2

080-12
080-16
080-20

2-1/2

100-16
100-20

2-1/2

120-20

UNiT SIZE

NUMBER

VENT PIPE

OF 90 ° ELBOWS

OIAIVIETER (IN.)

040-08
040-12

1-1/2

060-08
036060
060-16

1-1/2

080-12
080-16
080-20

2-1/2

100-16
100-20

2-1/2

120-20

040-08
040-12

1-1/2

060-08
036060
060-16

1-1/2

38
NA

UNIT SiZE

080-12
080-16
080-20

NUMBER

VENT P_PE
(IN.)

OF 90 ° ELBOWS

2-1/2

100-16
100-20

2-1/2

120-20

UNIT SIZE
040-08
040-12

800t to 9000?

OF 90 ° ELBOWS

OIAMETER

700t to 800Ot

NUMBER

VENT PIPE
DIAIVIETER (IN.)

NUMBER

VENT PIPE

OF 90° ELBOWS

DIAIVIETER (IN.)
1-1/2

060-08
036060
060-16

1-1/2

080-12
080-16
080-20

2-1/2

100-16
100-20

2-1/2

120-20

Wide radius elbow
i- Vent sizing for Canadian installations over 4500 ft (1370 m) above sea level are subject to acceptance by the local authorities having jurisdiction.
NA--Not Allowed pressure switch will not make
NOTES:
1 Do not use pipe size greater than those specified in table or incomplete combustion, flame disturbance, or flame sense lockout may occur
2 Assume two 45 ° elbows equal one 90 ° e@ow Long radius elbows are desirable and may be required in some cases. 3 Elbows and pipe sections within the furnace
casing and at the vent termination should not be included in vent length or elbow count.
4 The minimum pipe length is 5 ft for all applications

Tab{e8--MaximumAllowableVent PipeLength(Ft) Continued
ALTITUDE

1-1/2

060-08
036060
060-I6
080-12
080-16
080-20

OF 90 ° ELBOWS

DIAMETER

040-08
040-12

9001 to 10,000t

NUMBER

VENT PIPE

UNiT S_ZE

(BN.)

2-1/2

100-16
100-20

2-1/2

120-20

* Wide radius elbow
? Vent sizing for Canadian installations over 4500 ft (1370 m) above sea level are subject to acceptance by the local authorities having jurisdiction.
NA--Not Allowed; pressure switch will not make
NOTES:
1. Do not use pipe size greater than those specified in table or incomplete combustion, flame disturbance, or flame sense lockout may occur.
2. Assume two 45 ° elbows equal one 90 ° elbow Long radius elbows are desirable and may be required in some cases
3. Elbows and pipe sections within the furnace casing and at the vent termination should not be induded in vent length or elbow count.
4. The minimum pipe length is 5 fl for all applications

....
....
---

24-V
TERMINAl
BLOCK

FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WiRiNG
FACTORY 115-V WIRING

WiRE
NOTES:

FURNACE

1. Connect YZterminal in furnace as shown for proper blower operation.
2. Some thermostats require a "C" terminal connection as shown.
3. if any of the original wire, as supplied, must be replaced, use
same type or equivalent wire.
A02174

Fig. 30--Typical
2. Humidifier

and screw

33) HUM terminal

is energized

EAC
dttring

terminal

connection

with 24v (0.5-amp

((oM

(See Fig

When

maximum)

tem_inals
blower

may be added

controlled

relay

if humidifier

connected

operation

I venting

spillage

operation

adjacent

Furnaces

require

vent system.
to t\_rnace,

outdoor
atmosphere.
accordance
to these

a dedicated,

(one

All air for combustion
and

all flue

The venting
inst_,_ctions.

gases

system

58MSA

t\mlace

is taken t'rom the
are

shall

discharged
be

installed

to
in

< ategory
system

attached

system

£t_rnace and vent,

is desired

9--Venting

only) sealed

venting

the remaining

115-v

Wiring Diagram

an existing

original

gas valve is energized
A field=supplied,

The 5SMSA
area

(HErM)

for 24-v humidifier

when

Step

terminal

24°v) are provided

Application

REMOVAL OF EXISTING EL RNACES FROM
(OMMON VENT SYSTEMS

(HUM)

A quick-connect

NOTE:

Heating and Cooling

appliances

could

cause

leakage

of combustion

I furnace

may no longer

be sized

An improperly

the formation

of condensate

products

is removed

or replace&
to properly
sized

(ategory

of condensate

and combustion

into the living

space,

the
vent

in the

products,
etc.

CARBON

MONOXIDE

Failure to follow
connected

in carbon

following

connected
while

outlined

to the venting

could result
The

POISONING

the steps

system

shall

to the venting

fbr each appliance

placed

poisoning

being

connected

In Canada, construct all cornhustion-air and vent pipes [br this unit
of CSA or UL( listed schedule-40 PVC, PV(-DWV or ABS=
DWV pipe and pipe cement. SDR pipe is NOT approved in
Canada

into operation

or death

fbllowed

system

all other appliances

HAZARD

below
being

rnonoxide

steps

standards See Table 7 for approved rnaterials %r use in the U.S.A.
See Table 8 fPr nlaxinmm pipe lengths and Fig 39, 40, and 41 fbr
exterior piping arrangements

for each
placed

appliance

into operation,

to the venting

system

Vent pipe re*ruination must be installed with adequate clearances
to building openings and equipment to comply with national and
tocal codes,

are

not in operation:
1. Seal any unused
2. Inspect

openings

t!-_e venting

pitch, as required
Z223A=2002NFPA

Installation

3. As far as practical,
and all doors
connected

deficiencies,
close

between

which

all building

doors

system

are

UNIT

leakage,

could

the space in which

to the venting

fireplace

cause

other

and any appliance

the venting

system.

range

and bathroom

hoods

at maximum
6 Follow

speed.

t!-_etighting

inspected

into

7 Test for spillage
hood

operation.

Turn

on any

such

a summer
the thermostat

relief

opening

venting

being

so appli=

after

appliances

5 minutes

of a match

is observed

Installation

burner

or candle.

during

the

venting

system

outlined

above,

fireplace
previous

dampers and any other gas-fired
conditions
of use.

Vent

system

other

appliances

system

doors,

or vent connectors
when

or connector

determined
NGPIC.

remm

vents

using

vent

must be sized

COMBUSTION=AIR

AND

windows,

tested

exhaust

systems

appliance

VENT

fbund

combustion-air

pool and swimming

bleaches,
paint,

cleaning
and other

solvents,
household

inlet as fbr as possible
pool pump

fi'om

house

NOTE: All pipe joints must be cemented except attachment of
comhustion-air inlet pipe to inlet housing connection, since it may
be necessary to remove pipe for servicing.

to their

Install combustion air inlet pipe as fbllows:
1. Assemble combustion-air

For any

or vent connectors,

to approach

table

as
fans,

rnay need to be resizcd.

resizing

appropriate

connected

when

adhesives,

that

include fluo=
elements
are

Combustion-air pipe must terminate outside of f:urnace casing with
1 elbow Orient elbow so that opening faces down fbr upflow or
downf]ow applications Orient elbow so that it faces sideways (left
or right) for horizontal left or horizontal right applications (See
Fig 34,) Maintain a 3-in. mininmnt clearance between the opening
of' the comhustion-air inlet pipe and any object,

any of the above

that each appliance

properly

Locate

detergents,

which
These

Furnace combustion°air connection must be attached as shown in
Fig 34 Combustion-air intake housing plug may need to be
relocated in some applications,

Code.

9 After it has been deternrined
to

air fresheners,

by halogens,
and iodides

See Table 10 fbr required clearances,

at the

of main

air may

NOTE: Furnace combustion°air connections are sized fPr 2°in.
pipe. The combustion=air pipe will be 2=in. diameter in all
installations.

tim.

tests, the venting system must be con'ected
in accordance
with
the National
Fuel
Gas (ode,
ANSI
Z223.1=
2002 NFPA 54-2002 and/or (SA B 149.1, Natural Gas and
Propane

in aerosols,

salts,

swimming

continuously
flora drak hood equipped

congt_ustion

exhaust

Ptace the appliance

Adjust

Use the flame

8. If improper

fans,

so they are operating

Do not operate
instructions

not connected

exhaust

exhausts,

operation.

is operating

found
products.

dryers

to contaminated

is fi'equently contaminated
rides, chlorides,
bromides,

the appliance(s)
and

HAZARD

exposure

result in safety and perfbrmance
related problems.
Combustion
air must not be taken front inside a structme

and windows

located

CORROSION

Excessive

dampers.

5. Turn on clothes

draft

or restriction,

of the building.

4. (?lose

ance

Combustion Air Pipe

size and horizontal

(?ode and these instructions.

that there is no blockage

corrosion
and other
unsafe condition.

spaces

system.

for proper

in the National
Fuel Gas Code, ANSI
54°2002 or the CSA B149.1, Natural

Gas and Propane
Determine

in venting

system

mininmm

in the NFGC

inlet pipe.

a. Permanently install perforated disk assembly (factorysupplied in loose parts bag) in combustion°air elbow using
RTV or by cementing. (See Fig. 35.)

size as
or NSC=

For 120,990 Btuh size unRs only: Separate the 2 halves of
perfPrated disk assembly and use only the shouldered disk
half,

PIPING

General

b. Determine length of straight portion of combustion°air
pipe fi'om table in Fig. 35.
FIRE
Failure

AND EXPLOSION
to %llow

damage,

personal

injuw,

Solvent

cements

are

sparks,
Avoid

and open
breathing

HAZARD

this warning

could

flame.

c. (ut field°supplied
length.

in fire, property

Use

only

Keep

away

fiom

in well°ventilated

or allowing

contact

with

d, Permanently attach elbowiperfbrated
disk assembly to
straight portion of' pipe using RTV or by cementing. (See
Fig. 35)

heat,
areas.

skin

2, Attach con-{bustion-air inlet pipe

eyes.
( ombustion°air
conform
dards

2-in diameter PVC pipe to detem_ined

or death

combustible.

in vapor

result

inlet

and vent pipe, fittings,

to American

and American

National
Society

printers,

Standards
for Testing

and solvents

Institute

(ANSI)

and Materials

a Detem_ine tocation of combustion-air intake pipe connec°
tion to combustion-air intake housing as shown in Fig 34
fbr application.

must
stan=

(ASTM)

b. Reposition combustion°air intake housing plug fitting in
appropriate unused intake housing connection.

TaNe 9--Maximum

Allowable

FURNACE
SRZE

Exposed Vent Pipe Length {ft) With and Without
Temperature Ambient*

WINTER DESIGN
TEMPERATURE
(°F)
20

MAX PBPE
DIAMETER
(BN.}
1.5

040

100

120

WITHOUT

in Winter

THICKER

INSULATIONt
70

1.5

-20

2.5

-20

2.5

-20

2.5

-20

* Pipe length (fi) specified for maximum pipe lengths located Jn unconditioned
as specified in Table 9.
? Insulation thickness based on R value of 35 per in.

spaces. Pipes located in unconditioned

e. Make

space cannot exceed total allowable

sure elbow is oriented

that the minimum
34.)

in an acceptable

clearance

hole in intake

=FACTORY
INSTALLED
LOCATION

g. Install

housing

a field-supplied

Install

filler

hole

inlet pipe using

No. 6 or No. 8 sheet metal
pipe

casing

in unused

and

(See Fig.

as a guide

into combustion-air

parts bag)

pipe length

direction

of 3 in is observed.

L Drill a 1/8-in. hole in 2=in. combustion=air

FIELD
LOCATION

Design

W_TH 3t8=lN. OR

INSULATION
51

-20

060

080

Insulation

cap

(factow-supplied)

combustion-air

pipe casing

screw

in loose
hole

NOTE:

Do not attach

combustion-air

intake honsing

pipe for service

of igniter

(OMBUSTION=AIR

intake pipe permanently

since it may be necessaw

or flame

sensor.

INTAKE

HOUSING

to remove

PLUG

FITTING
The

combustion-air

unused
attached
fitting,

by using
using

field-supplied

Fig. 31--Relocating
c Install

pipe

into selected
support
d. Insert

support

should
assembled

&Box

(_ilctow-supplied

fimaace casing
be positioned

in loose

combustion-air
at bottom

combustion-air

A00212

inlet

parts

bag)

pipe hole. Pipe
of casing
pipe

into

hole.
intake

housing.

intake

combustion-air

NOTE:

DO NOT

housing

or fitting

hole

plug

intake

RTV sealant,
in intake

fitting

housing

must

be installed

This

fitting

or by &illing
housing

a 1i%im hole in

as a guide.

No. 6 or No. 8 sheet metal

screw.

OVERTIGHT]EN

Breakage

SCREW.

may cause air leakage

to occur.

must
Install

of intake

25-24-65-2

(_AIR

VENT TERMINAL

SUPPLY INLET

Item

Clearance Descriptions

Clearance above grade, veranda, porch, deck, bafaony, or
anticipated snow level

12 (3Ocm) #

Clearancetoawindowordoorthatmaybeopened

6" (15cm)forapplia_ices

AREAWHERE

TERMINAL

Canadian fastaHaflon (1)

Clearance to a permanently dosed window

Vertical clearance to a ventilated soffit located above the

IS NOT PERMITED

U.S fastallation

(2)

12" (36 cm)

10,OOOBTUH(3kW),12

(30

4"(12m)belowortothesideoftheopenfag'l(3Ocm)

cm) for appliances > 10,OOOStut'd3 kW) and 100,OOO Btuh
(36 kW)j'36 (91 cm)for appliances > 100.000 Btuh (30 kW)

above the opening

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

Clearance to an unventilated soffit

Clearance to an outside cornet

Clearance to an inside corner

Clearance to each side of the centedine extended above

_ (91 cm) within 15"(4.5 m) above the meter/regulator

3" (91 cm) withih 15 (45 m) above the meter/regulator

electrical meter or gas service regulator assembly

assembly

Clearance to service regulator vent outlet

_ (91 cm)

Clearancetonon-mechanicalairsupplyin_ettobuildfagor

6" (15cm)forapplia_ces

the combustion air inlet to any other appliance

cm) for appliances > 1O,OOOBtuh_3 kW) and 1OO,6OOEtuh
(36 kW)j'36 (91 cm) for appliances > 100,660 Etuh (30 kW)

opening

Clearance to a mechanical air supply inlet

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

Clearance under a verand& porch, deck, or balcony

12" (30 cm) +

Clearance to each side of the centedine extended above or

10,OOOBTUH(3kW),12

(30

(1 83 m)

4" (12m)belowortothesideofdpening:1

(3Ocm)above

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

Clearance to the vent terminal of a dryer vent, water heater
vent, or other appliances direct vent intake or exhaust

Clearance from a plumbing vent stack

Clearance above paved sidewalk or paved
driveway located on public property

7' (2 13m)**

(1)

In accordance

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

(2)

In accordance

with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code

7' (2.13m)
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

For clearances

not specified in ANSI Z223 t/NFPA 54 or CSA E149.1, clearances shall be in accordance with Iocat installation codes and the requirements of the gas supplier and the

Manufacturer's

installation instructions

A vent shall not terminate 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
c

Near soffit vents or crawl space vents or other areas where condensate or vapor could create a nusiance or hazard or property damage; or
Where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief valves, or other equipment.

When locating vent terminations,
Recircuiation

consideration

can cause poor combustion,

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

inlet condensate problems,

Avoid venting under a deck or large overhang

Recirculafion

and accelerated

could occur and cause performance

-_ Table 10--Other

of the combus6ob products of adjacent vents

corrosion of the heat exchangers
or system problems

than Direct Vent Termination Clearance
30

A05013

TO 115VAC

FIELD

DISCONNECT

SCHEMATIC

DIAGRAM

PCB
NOTE #2

IL 2

GNDi_

SPARE-2 -"

L1D@R_

H}ILO

(NATURALGAS & PROPANE)

7 EQUI[t%IBXq GROUND

M[DLO

CAP-1

SPAREq

L2 I

HEAT
COOL ..NOTE #10

PL4

V_ff

BRN

EAC_

BRN

PL1
_HT CRN/YEI,,

CAP

]DM

BLK

SPARE 2

R® /
w®/t/

EAC-1

¢THT

(OOM)

_SCONNECT
S/._ITCH (lAdEN
___NOTE_#2

NOTE #10
BLK
RED (LO)

ILK--

BLU
(MED LOJ
I

ILK

---........

PU2

BLOWER MOTOR SPEED CHANGE RELAY, SPDT
BLOWER MOTOR RELAY, SPST-(N O)
BLOWER MOTOR¸ PERMANENTSPUTCAPACITOR
CAPACITOR
MICROPROCESSOR
AND CIRCUITRy
ELECTRONIC AIR CLEANER CONNECTION (115 VAC 1 0 AMP MAX¸)
ELECTRONIC AIR CLEANER CONNECTION (COMMON)
FLAME ROLLOUT SW -MANUAL RESET SPST-(N C )
FLAME-PROVING ELECTRODE
FUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED

FU 2
GND

FUSE OR CIRCUIT BREAKER CURRENT
(FIELD INSTALLED & SUPPUED)
EOUIPMENT GROUND

GAS MALVE_REDUN DANT

GMR 1 2
HSI
HSIR
HUM
IDM
IDR
ILK
J1
J2
JB
LED

GAS VALVE RELAY, DPS_-(N O )
HOT SURFACE IGNITER (115 VAC)
HOT SURFACE IGNITER RELAY SPS_, (N O)
24VAC HUMIDIFIER CONNECTION (0 5 AMP MAX¸)
INDUCED DRAFT MOTOR¸ PSC
INDUCED DRAFT MOTOR RELAY, SPST (NO)
BLOVlJER ACCESS PANEL IN]ERLOCK SWITCH, SPST (N O)
BLOWER - OFF DELAY JUMPER SELECTOR
COOLING - OFF DELAY JUMPER
JUNCTION BOX
LIGH*PEMITTING DIODE FOR STATUS CODES - RED

LGPS
LS

LOWGAS PRESSURE SM/ITCH, SPS]:(N O)
LIMIT SWITCH, AUTO-RESET
SPST (NC)

INTERRUPT

PCB
PL1
PL2
PL3
PL4
PRS
TE SPPRA/IN
TRAM

DEVICE

G_D

I -I

REQ'D}

PRESSURE SWITCH, SPST-(N O )
COMPONENT TEST & _RMN TERMIRAL
TRANSFORMER-115VAC!24_,AC

PCB CONTROL TERMINAL

TERMINAL

NOTES:
1
2
3

If ar_y of the onginal eq_ #_leqt '_'_re is iet:Jaced use '_re lated for 105 C
Use only copper '_re bet_,een the disconr_ct
s,_tde and the fun'ace jul_ction box (JB)
This _._.4remust de cor_ected
to furnace sheet met_ for control to prove flame
Syrdeols
elec_]cal
repiesenta_on
Solid
linesare
ir_ide
PCB are
printed circ_tonl _oard conductors

FACTORY tMRING (115VAC)

6
7
8
9

FIELD WIRING (115VAC)
FIELD WIRING (24MAC)

apd are not ir_,luded

in legend

Replace ctly with a 3 amp f_se
Inducer (IDM) a_d blower (BL_M)
motc_s centaln intem_ ad_o-reset therm_ overlead
Neutral connections
_ e interchangeaNe
_thin the NEUTRAL
conr_cto_
block
BloweI" moto_ speed selec_or_
ale for avetage condtions
see ii_st_lation
instrucqons
optimum speed selection
YELLOWlead
i'_€ on all r_'oto_ s

PCB

FIELD WIRING SCREW TERMINAL

11
12

Fantol 3, connected
whel LGPS is not used
lgnitiol_-Iockout
w_ll OCCUr after four consecutive
auto4-eset alter _ree houis

13
14

Blower-ct_ delay: gas dealsng 60 seconds, cooling c{ hea_ pt,rnp 2 seconds
Blower-off delay: gas dealing selections are 90 120,150 or 180 seconds, coding
90 see_nds Or 5 seconds when J2 is cut

CONDUCTOR

ON CONTROL

FIELD EARTH GROUND
EQUIPMENT

GROUND

FIELD SPLICE
)_

2_CIRCUIT CONNECTOR
2_IRCUIT
HSI, CONNECTOR
3dSIRCUIT IDM EXTENSION CONNECTOR

FACTORY WIRING (24VAC)

PRS

[EMPERATURE
SWITCH (NC)
PRINTED CIRCUIT BOARD CONTROL
11 _31RCUIT PCB CONNECTOR

UNMARKED

L i,_{_#11_

JUNCTION

-- -- -....

MOTOR OVERLOAD

I M1

.E.osJ

BLK---_OI"

AUTO RESET INTERNAL
BHT/CLR
BLWR
BLWM
CAP 1,2
CPU
EAC-1
EAC_
FRS
FSE
FU 1

_JM

BLK

unsuccessful

trials-for4gn_tion

PLUG RECEPTACLE

Control

S',Mtches (OL)
for details

w_ll

or heat p_rrlp

328150-101

RE1L A
./

A02271

Fig. 32--Wiring

Diagram

BLOWER

TWINNING AND/OR
COMPONENT
TEST
TERMINAL

OFF-DELAY

J2 JUMPER

HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP MAX.)
24-V THERMOSTAT
TERMINALS
TRANSFORMER
24-VAC
CONNECTIONS

3-AMP

FUSE

LED OPERATION &
DIAGNOSTIC LIGHT

PL1-LOW VOLTAGE MAIN
HARNESS CONNECTOR
115-VAC(L2)
CONNECTIONS

A02100

A plugged

drain connection

fbr use when moisture
and combustion

box

&ill out fitting's
field-supplied
condensate
tIapped.
Vent

intake

tap plug with

a 3/16-in.

&ill and connect

robe. This tube should

for furnace

pipe

be routed

and AiC (if used),

UNIT

is desired,

When

and should be

in vertical pipe.
condensate.
Detem_ine
Table 8
Furnace

should

are sized

be made outside

furnace
&ainage

is used

described

in Table

casing

An abandoned

of vent

properly

diameter

and maximm_a

housing

alternate

must be attached

pipe lengths

using

ft upward

as shown

in Fig.

vent cap may need to be relocated

slope vent pipe a minimum

to termination(s)

with

unit

to temperatures

through

below

an unheated

as a raceway,

pipe

must

9 with Am_aflex-type

fi'eezing,

space or when
be insulated

a
as

insulation

masonry

insulated

and

chimney
supported

may be used
vent

sags

pipe

as a raceway

Each

individually,

furnace

%r
must

as shown

gas appliances

wit}* their

own venting

system

may also use

the abandoned
chimney as a raceway providing
it is permitted
by
local code, the curt'out edition of d_e National Fuel Gas (7ode and
the vent or liner manufi_cmrer's
installation
instl-uctions. Care must

be taken
at furnace,

in intem_ittent

Fig. 41.

applications.

linear

chimney

Other

Starting

it passes

have its own vent pipe and be terminated

vent pipe connection

NOTE:

may result

for 2-in. pipe.

(See Fig. 37.) This allows proper

vent pipe

34. Inducer
some

connections

OPERATE
this caution

vent pipe is exposed

such as when

vent pipe

Any vent pipe size change

NOT

to %ltow

operation.

to open

(See Fig. 36.)

Furnace

MAY

Failure

Pipe

NOTE:

per

on this fitting

If use of this drain connection

3/8-in.
&ain

has been provided

is fbund in combustion-air

of 1/4 in

to prevent

contaminating

between

hangers.

the exhaust

the combustion

gases

fi'om one appliance

air of other

gas appliances.

from

NOTE:

Select 1 vent pipe connection and
I combustion-air
pipe connection.

FIELD-SUPPLIED
2-IN. DIAMETER ,,--- F ELD-SUPPL ED
PVC 90" ELBOW/
2-IN. DIAMETER
/_"
PVC PIPE

NOTE: Select 1 vent pipe connection and
1 combustion-air
pipe connection.

AIR
AIRCOMBUSTION-

COMBUSTION-AIR
V_NT

VENT
_

j_[

VENT

_]_
_2

72227

AIR

UPFLOW

AIR
FLOW

AIR

_LCOMBUSTION-AIR

DOWNFLOW

DISC

(FACTORY-SUPPLIED IN
LOOSE PARTS BAG)
COMBUSTIONAIR

COMBUSTIONAiR

A96211

VENT

Length

VENT

of Straight

Combustion-Air

HORIZONTAL-RIGHT

HOUSING
PLUG

DISCHARGE

(In.)

A
8-112+ 112
10-1/2 + 1/2
12 + 1/2

Fig. 38--Combustion-Air
DISCHARGE

1Net Pipe Assembly

CASBNGWIDTH
17-112
21
24-112

"t
HORIZONTAl-LEFT

Pipe Portion

Inlet

Pipe AssemNy

INTAKE HOUSING
BURNER
BOX

A96188

[NIT MAY NOT OPERATE
Failu*e to follow this caution may result m intemlittent unit
operation.
Make sure there is adequate clearance (3°in. minhmma) to any
fixed or toose objects in orde* to ensure an adequate
combustion-air supply

E_COMBUSTIONAIR PIPE

Fig. 34_Combustion-Air
and Vent Pipe
Connections
A96190
HHHH,_,

CARBON MONOXIDE
DAMAGE HAZARD

POISONING

Fig. 36--Air

IIII

Intake Housing

Plug Fitting

Drain

AND PROPERTY

Failure to fbltow this warning could result
damage, personal ir_juW, or death.
Vent pipes must be airtight and watertight

in property

• FURNACE
NOTE: The mh_imum vent pipe length for these fm'naces is 5 f_
Short pipe lengths (5=8 ft) may discharge water droplets These
droplets may be undesirable, and a 12=in mininmn_ of_get pipe
section is recommended to reduce excessive droplets flora exiting
vent pipe outtet. (See Fig 3g.)

•

£j_

NOT IN
HORIZONTAL
SECTION

NOTE: Do not count elbows or pipe sections in tem_inations or
within t:umace. See shaded areas in Fig. 40,

TRANSITION iN
VERTICAL SECTION
A93034

Fig.

37--Vent

Pipe Diameter
Transition
and Elbow Configuration

Location

VENT PIPE

VENT PIPE
i.,,,,_t_

HORIZONTAL

12" MIN

HORIZONTAL

TO ROOF

TO SIDEWALL

VENT PIPE

12" MIN

VENT PIPE

VERTICALTO

ROOF

VERTICAL TO SIDEWALL

NOTE: A 12-1n. minimum offset pipe section is recommended with
short (5 to 8 ft) vent systems. This recommendation is to reduce
excessive condensate droplets from exiting the vent pipe.
A96189

Fig. 38--Short

Vent (8 to 8 Ft) System
1

EXAMPLE:
An 080-12 size furnace located in Indianapolis, elevation
650 ft above sea level, could be installed in an application
requiring 3 elbows and 32 ft of vent pipe Table 8 indicates
this application would allow a 2-in. diameter vent pipe. At
0°2000 k elevation, 2-in. pipe is good fbr up to 35 ft with
3 elbows. If same installation were in Albuquerque, elevation 5250 ft above sea level installation would require 2° 1/2
in. vent pipe. At 500I- to 6000-_ elevation, 2-in. pipe is
allowed for up to 23 f_ with 3 elbows, but 2-!/2 in. pipe can
be used for up to 70 ft with 3 elbows

--€

UNIT

DAMAGE

Failure

HAZARD

to follow

this caution

may result

in unit

component

damage.
Inducer

housing

outlet

cap must

against

inducer

housing.

Clamp

any condensate

leakage.

3, Install

pipe support

selected

furnace

positioned

___>

Install vent pipe as _bllows:
l. Determine location of vent pipe connection to inducer housing
as shown in Fig 34 fbr application

at bottom

MONOXIDE

DAMAGE

HAZARD

Failure

(factowosupplied

casing

(ARBON

to fPllow

be installed

and thlly seated

must be tightened

to prevent

in loose parts

vent pipe hole, Pipe support
of casing

hole

POISONING

this warning

bag) into
shoutd

could

AND [NIT
result in personal

injury

or death and unit damage

2. Reposition elastomeric (rubber) inducer housing oudet cap
and clamp to appropriate unused inducer housing connection
Tighten clamp.

Vent pipe must be installed

and fully seated

housing

must be tightened

internal

condensate
NOTE:
casing

elastomeric

against

inducer

to prevent

any

leakage.

A 2=in. diameter
Make

4. Be certain

stop. Clamp

pipe must

all pipe diameter
that mating
coupling,

be used

transitions

surfaces
and 2-in

within

outside

of inducer
diameter

the furnace

[:urnace casing.

housing

connection

vent pipe are clean

and&y. Assemble
theelastomeric
(rllbber)
ventcoupling
(with2loose
clamps)
ontoinducer
housing
connection.
Insert
the2-in.diameter
ventpipethrough
theelastomeric
(rllbber)
coupling
and_hllyintoinducer
housing
connection
untilit
bottoms
ontheinternal
stop.
Tighten both clamps to secure the
pipe to inducer

housing.

Tighten

the clamp screws

to 15 inMb.

casing

hole

bag) in unused
VENT

Some

filrnaces

(2-in.

diameter

vent

NOTE:

are supplied
by

vent

a PVC vent extension

tong).

This

condensate

pipe

disposal.

a built-in

When

this vent

inducer

housing

on ALL

pipe for proper

if an elbow

robe to field-installed

is used

installation

to connect

When

vent

vent pipe.

fi/rnace

and outside

8. Chamfer outside
and cement.
9. Clean and d_
10. Check
NOTE:

outside,

cut

pipe

all surfitces

It is recommended

11. After

pipes

that

have been

to insertion

of primer

insertion

all pipes

depth

Apply

be cut, prepared,

cementing

to pipe fitting

Quickly

second

cement

apply

and

any joint.

pipe joints

15. Support

vent piping

or -26 PVC)

fiom joint.

apply

socket

approved

generous

17. Use

carefidly

cement

passes

a minimum

Extended

Exposed

Sidewall

vent

length

to end of
in a light,
of excess

metal

to seal

trap is shipped

located
length

Pipe

may

ambient

trap is not required

hanging
Nrnace

of 1/4

spaces

in the blower

shelf and [itctory

be used

for all applications.
when

connecting

the field drain to

1i2=im

(condensate

to ASTM

D2564

In Canada,
pipe,

CPV(,

flap or drain robe coupling)

and
must

1/2-in.

fittings,

5/8=in.

must conform

listed schedule

to ASTM

40 CPV(

and cement.

pump

tbr condensing
select

PVC,

or F493. Primer

use CSA or ULC

a condensate

UNIT

hangers.

openings

MAY

Failure

where

be extended

vent pipe

is required,
furnace

a pump

select

a pump

applications.

which

To avoid

with an overflow

conden-

switch.

NOT

OPERATE

to _bllow this caution

beyond

temperature

area

&ain

fbr

cannot

l\)r maximum
exceed

pipe

&ops

operated,
structure

and then mined
doting

to 32°F and below

line have adequate
Instructions

[i'eeze

off and

cold weather

unless

protection.

drain

when

trap

See Service

_Br winterizing

procedures.

and
and
(See

condensate

pH neutralizing

authorities

to determine

filter may be desired.
if a pH neutralizer

Check

of
a

with local

is required

APPLICATION

lengths

total allowable

unit

Furnace condensate
is mildly acidic, typically in the pH range
32 to 4.5 Due to cotl'osive nature of unneutralized
condensate,

and furnace

exposed

in intem_ittent

Fig. 15.)

(used in load calcula=

thickness

may result

operation.

pipe as indicated

fPr your application

specified

in Table

vent

shap.
a minimum

as stated above, using total pipe

insulation

(ft)

common

Drain pipe and fitdngs
must conform
to ANSI standards
ASTM D1785, D2466 or D2846. CPVC or PV(
cement

sate spillage,

of elbows.

design

near each other, each

NEVER

trap.

Maintenance

temperature

in unconditioned

are not

robe

The

as specified

vent vapors

where

approved

sets.

by insulating

vent pipe diameter,

length

balls,

are vented

installed

An external

When

made joint.

lengths.
NOTE:

it will not be dan>
such as stones,

applications.
Condensate
trap must be
in DOVv_TLOW
and HORIZONTAL

trap MUST

F656.

Pipes

tem?ination

required

will not

Drain

left in an unconditioned

winter

where

vented

(ondensate

conform

tions).
3. Detem_ine

Furnaces

Unit must not be installed,

and number

vent vapors

10.

equipment.

objects

be positioned

Sidewall

pipe

using

should

roof or sidewall.

2. Find appropriate
model

to foreign

in Table

of every 5 ft (3 ft for SDR=2!

toward

methods

shown in Fig. 40 in outside
in Table 9.
1. Detemline

cement

ft with no sags between

through

where

be positioned

lO--Condensate

is sized fPr
connection.

bead of cement

of a properly

until

using perforated

appropriate

stated

or air conditioning

The field drain connection

and end of pipe

A continuous

perimeter

16. Slope vent pipe downward
in. per linear

requirements

be positioned

should

this condensate

coat.

around

14. Handle

should

plants/shrubs

2 or more 58MSA

PVC drain
will be visible

be made when determining

applications.

12. While cement is still wet, twist pipe into socket with 1/4 turn.
Be sure pipe is [:ully inserted into fitting socket.
13. Wipe excess

should

with all clearance

Condensate

on pipe.

pipe and fitdng socket Cover primer). Apply cement
uni[bm_ coat on inside of socket to prevent buildup
cement.

See
41 _br

for tem_ination:

connected
_br UPFLOW
RELOCATED
_br use

cut and preassembled,

primer

mark.

distribution

to be joined.

pem?anently

layer of cement

40, and

GENERAL

edge of pipe for better

before

or sidewall.

39,

required

of pipe.

&y fit of pipe and mark

preassembled

location

fitmace must be individually
breach vent 58MSA fiu_aces
Step

inside

roof

See Fig

objectionable.

length(s).
7. Deburr

through

MULTIVENTING

This pipe may be shortened

fiom

of the _Pllowing

4. Termination

and

applications.

5. Working

Consideration

aged by or subjected
etc.

the field

upflow

either

clearances.

an'angements

3. Tem_ination

pipe

has

it must be used to connect

See label on vent extension

extension

piping

2. Termination

hole.

with

12=in.

to filrnace

downflow

exterior

1. (omply

parts

terminate

10 _br required

damage

pipe is supplied,

pipe

in loose

pipe must

Table

PIPE

to assist

extension

cap (fhctolT-supplied

vent pipe casing

EXTENSION

channel

filler

Vent

TERMINATION

an appropriate

of torque.
5. Install

VENT

f_lrnace,

drained

pipe

A/C,

together.

and humidifier
The

Ai(

drain

drains

may be combined

retest have

an external,

and
field-

supplied
trap prior to the fi/rnace drain connection.
Al! drain
connections
(furnace, A/C, or humidifier)
must be tem_inated into

ROOF

OPEN STAND --7
PiPE FOR /

A/COR/

HUMIDIFIER _[
DRAIN

A94054

Fig. 42--Example

of Field Drain Attachment

an open or vented drain as close to the respective equipment as
possible to prevent siphoning of the equipment's drain,
See Fig 42 for example of possible field drain attachment using
li2-in (PVC or PV( tee for vent and AiC or humidifie* &ain
connection,
Outdoor

draining

codes.

Caution

of the ihmace

should

pipe and prohibit

12-1N.
CLEARANCE
ABOVE
HIGHEST
ANTICIPATED
SNOW
LEVEL OR GRADE,
WHICHEVER
IS
GREATER.

PERSONAL
Caunon

be taken

to prevent

could cause

personal

Excessive

condensate

draining

conditions

which

result

Freezing
cause

protection

is required,

shielded,

draining

may

where

cause

in damage

left in condensate
water

trap

damage

use condensate

slippew

saturated

soil

to plants.

and drain
may

occur.

freeze protection

3 to 6 watt per ft at 120v and 40°F

and waterproof
with accessory

2. Locate

drain

injuries

heat

tape.

heat tape between

line may
If fieeze
accessow

sel[:regutating,

See Installation

or heat tape manufhcmrer's

1. Fold heat tape in half and wrap

PIPE LENGTH

by local

may fieeze

DRAIN PROTECTION

and possible

or equivalent
supplied
tions

could

condensate

cracks,

if allowed

ambient

IN J[ RY HAZARD

CONDENSATE

PIPE.
10-1N.MAXIMUM

Freezing

draining

should

conditions

is permissible

be taken

Instructions
recommenda-

on itself 3 times.

sides of condensate

trap back.

(See

Fig. 43)
12-IN.
CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL OR GRADE,
WHICHEVER IS
GREATER.

3. Use wire

Termination

with Straight

in notches

heat tape

of condensate

4. Wrap field drain pipe with remaining
1 wrap
A96210

Fig. 41--Sidewall

ties to secure

positioned

5. When

Pipe

trap

Wire

sides.

ties can be

(See Fig. 43j

heat tape, approximately

per ft.
using

_Scturer's

in place.

field=supplied

instractions

heat rope, fbllow

for all other installation

heat rope manu=
guidelines.

CONDENSATE

WIRE TIE

(3 WRAPS

HEAT
MINIMUM)

Fig. 43--Condensate
START-UP,
Step l--General
1. Furnace

A93036

Trap Heat Tape

ADJUSTMENTS

AND

SAFETY

CHECK
......7

mast have a 115-v power

and grounded.

Proper

polarity

supply

properly

connected

must be maintained

A99118

fbr con'ect

Fig. 44_[nducer

operation.
NOTE:

Proper

polarity

must be maintained

polarity

is incorrect,

ft/rnace

rapidly

and furnace

will not operate.

control

2. Them_ostat
wire connections
must be made at 24-v terminal
3. Natural

gas service

we), but must

pressure

fault indicator

wiring.

Housing

Drain Tube Cap

light will flash

at terminals
R, W, G, and Y
block on thmace control center.
must not exceed

0.5 psig (14oin.

be no tess than 0.16 psig (4.5-in.

4. Blower
access panel must
electrical circuit to furnace.

FIRE

for l15-v

in place

wc).

to complete

l15-v

HAZARD

Failure

to follow

this caution

may result

in intermittent

unit

operation.
These

thrnaces

are equipped

with a manual

reset limit switch

in burner box. This switch will open and shut offpower
control vah'e if an overheat condition
(flame rollout)
in burner

enclosure.

ply or improper
jumper
Befbre

operating

2--Prime

UNIT
Failure

inadequate

condition

combustion-air

and reset switch

sup°

DO NOT

this switch

for continuity.
Step

Correct

venting

to gas
occurs

MAY

f_/mace,

check flame

If necessa_,
Condensate

NOT

to follow

rollout

press button
Trap

manual

reset switch

to reset switch

with

Water

OPERATE
this caution

may result

in intermittent

unit

operation.
Condensate
occur

trap must be PRIMED

The condensate

ONLY be primed
of condensate

or proper draining

trap has 2 internal

by pouring

charnbers

water into the inducer

A99119

may not
which

can

Fig. 45--FHffng

drain side
3

trap.

Insert

4. Pour

field-supplied
1 quart

1, Remove upper inducer housing drain connection cap (See
Fig. 44)

through

2, (onnect field-supplied
1i2oin ID robe to upper inducer
housing &ain connection,

5. Remove

inducer

into open field
funnel

drain connection

Condensate

fhnnel

of water
housing,

Trap

into tube

into

funnel/robe.

overfill

Water

condensate

should

tIap,

run

and flow

drain. (See Fig. 45.)
and

robe fiom

cap and clamp.

inducer

housing

and replace

Step

3--Purge

Gas

Lines

proved

within

two seconds,

the control

CPU will close the

gas valve GV, and the control CPU will repeat the ignition
sequence
fbr up to three more Trials-For-Ignition
befbre
FIRE

AND EXPLOSION

Failure

to %llow

personal

injury,

Never
for

purge

gas

going

HAZARD

this warning

could result in a fire, explosion,

a gas line into a combustion
with

open

chamber.

flame.

Use

available soap solution made specifically
leaks to check all connections.

Never

after

power

test

Step

done, purge
for leaks.

4--Sequence

lines after all connections

to the furnace,

If flame

is proved

fhmace

control

have been

Failure

to %llow

blower

and water

Furnace

control

will

[sing

must

through

diagram

be grounded
out.

for proper

Control

grounded

in Fig. 32, fbllow

the diffkrent

modes

through

If a power

control

seconds

will

interalpfion

start

after power

gas heating.
90-second

The

a 90-second

is restored,
red

period,

occurs

LED

the wiring

light

will

flash

ON period

two

is still calling

for

12 during

the

the LED will be ON continuous,

are detected.

flul_ace will respond

blower-only

Afier

code

the 90-second

to the thermostat

period,

motor

(PU,

transl\_rmer

TRAN,

BLWM,

hot-surface

igniter

motor

IDM,

HSI, and gas valve

30 fbr thermostat
thermostat

wall

circuit.

The fl/mace

pressure switch
motor IDM.
a. Inducer

contacts

blower

up to speed,

24 vac power
the

HUM

prepurge

the pressure

is supplied

terminal

and

Warm-Up-

Hot-Surfi_ce

period
close

the

inducer

switch

contacts

the control

a 15-second

begins

Igniter

warm-up

HSI

energized

fbr

to energize

When

the gas valve

The gas valve GV pemaits

the igniter

gas flow to the burners

by the Hot Surfhce

Igniter

HSL Five seconds

the GVR

closes,

flame

period

a 2-second

will remain

energized

the 2-second

flame

until

proving

begins.

d-_e flame

period

flame-proving
CPU begins

When
sensor

the burner
electrode

after

the blower-ON

hold the gas valve

delay period

GV open.

is proved

the fl/mace

If the burner

flame

with

as HEAT

at the

flmction

is not

allowing

will operate
the blower

motor

circuit

operating

requires

blower

seconds),

and

fhmace

heat

the

at the end of

speed

running

after

fbr cooling",

speed

speed.

BLWM
befbre

J2 can be can

the R-to-G

will stop during
(7

CPU will continue

at (OOL

to 5 seconds.

the

selected

is completed.

"calls

on COOL

is energized

then restarts

at HEAT

delay period

the

continuous-blower

BLWM

seconds),

control

themlostat,

EAC-!

ignition

BLWM

Jumper

the cooling

is energized

the blower

delay period

thermostat

the

seconds),

(65

the furnace

will continue

(17

Terminal

BLWM

to heat up more quickly,

When

contlol

speed)

motor

exchangers

90 seconds

speed fbr

delay

the

on the COOL
J2 to reduce

operate

blower-ON

motor

are

blower

is closed
will

wam_-up

speed.

and continues

speed.

is energized

and the t\trnace

operating

circuit

% call for heat('

satisfied,

stop,

Cut jumper

BLWM

igniter

BLWM

begins.

flame

FSE,

on COOL

EAC-1

Mode

R-to-G

motor

offtdelay
d. Flame-Proving-

The R-to-Y

and Y circuits

(See Fig. 33.)

During

When

The HSI

is sensed

circuits.

BLWM

terminal

will continue

blower-OFF

opens.
where

flu'hate

blower-OFF

and the R-to-G

unit will

Blower

the

blower

GVR

GV, the gas valve

The
wilt

connections)

motor

to 5 seconds.

In heating,

warm-up

is ignited
igniter

the

a 17-second

the main gas valve relay contacts

the
will

(depend-

The

for a 120-second

unit,

blower

the blower-ON

Sequence-

the

period.
EAC-I

selection).

closes the R-to-G-and-Y

long as ff*e blower

period.

is completed,

is fitctory-set

90 seconds.

speed (same

period,

delay

air cleaner

BLWM

blower

PRS close,
humidifier

is satisfied,

the gas valve GV,

fbr 90, 120, 150, or 180 seconds

the outdoor

Continuous

IDM

fbr a field installed

the thermostat
de-energizing

to the burclers, and de-energizing
HLM. The inducer motor IDM

The outdoor

off'delay

the

motor

At tl-_eend of the prepurge

c. Trial-Nr-Ignition

until

starts

an additional

period.

b. Igniter
igniter

When

blower-OFF

CPU

EAC-!

Mode

When
Period-

terminal

as tong as the blower

115 vac when the blower motor BLWM is operating.
When the thermostat is satisfied, the R-to-G-and-Y
circuits

the R to W
verifies

the

The electronic

GV.

a self-check,

air cleaner

energized

is opened,

start the t\lrnace

PRS are open, and starts the inducer

Prepurge

comes

perfbm_s

closing

the
after

is energized.
Delay-

The thermostat

motor

for heat",

contlol

the electronic

(See Fig. 30 fbr them_ostat

the

connections.)

"calls

is proven,
66 seconds

energized

opened.

The

flame
speed

remain

Cooliug

1. Heating
(See Fig

on HEAT

delay.

for power to be condtlcted
switch ILK to the furnace
inducer

the
mode

IDM until flame is no longer

energized
for a 15-second post=purge
motor BLWM and air cleaner terminal

circuit

control

not be present,

of Gas-Heating

the burner

and remains

circuit

control

normally

The blower door must be installed
through
the blower
door interlock

should

remain
blower
ing

a call for heat (W),

if the thermostat

after which

as no faults

during

motor

stopping
gas flow
humidifier
terminal

box screw

Read and fbltow

24 vac

CPU (not at

GV is energized.

BLWM

R-to-W

the sequence

flame

is energized

f_ Blower-Off

operation,

to gas valve and burner

diagram

motor

cold weather.

very- carefully.

NOTE:

long

during

auto-

or by interrupting

will lock out

Delay-

motor

is energized

may result in t:urnace operation

freezing

wire routed

the schematic

operation

the

pipes

lock

green/yellow

OPERATE

this caution

stopping

when

CPU

Simultaneously,
NOT

reset

interrupting

to the [:urnace control

the inducer

e. Blower-On

of Operation

MAY

proved.

the gas valve
FURNA(E

will

by momentarily

W, G, R, etc.)

a commercially

for the detection

Lockout

hours,

at SEC1 or SE(2

and operate
[f not previously
made and check

three

115 vac power

or death

leaks

to Ignition-Lockout.

matically

the blower

When

will operate
reverting

motor

the d_em_ostat

an additional
back to HEAT

be cut to reduce

the cooling

(See Fig. 33.)
is opened,

the blower

for an additional
motor

BLWM

motor BLWM

5 seconds,
operation.

if no other

4. HeatPumpMode
Wheninstalled
witha heatpump,
thefl/mace
control
automatically
changes
thetimingsequence
toavoidlongblower
offtimesduring
demand
defrost
cycles.
When
theR-to-Wand-Yor R-to=W-and-Y-and-G
circuitsareenergized
the
Nmace
control
CPU
willcontinue
toturnontheblower
motor
BLWMat HEATspeed,
andbegina heating
cycle.The
blower

motor

prepurge

BLWM

period,

on at HEAT
Nrnace

speed.

control

the blower

will

remain

on until

the end

then shut off %r 24 seconds
When

begins

switches

the W input

a normal

to (OOL

post-purge

Step

pear,

delay period.

leaving

continue

If the R=to-W-and=Y

the G signal,

running

the

the blower

after the selected

blower

motor

blower-OFF

signals

motor

BLWM

delay period

BLWM

NOTE:

The

control

terminal

HUM

terminal

is energized

helps

diagnose

The

component

signal

component

time; except

rating

is completed.

are not energized
when

a system
test

is present

test allows

for safety

problem

all compo=

reasons.

The

is energized.

at the control

not

operate

all time

thermostat

setting

above

input

rate must

plate adjusted

be within

2 percent

of input on furnace

fbr altitode.

natural

gas orifice

size and manifold

pressure

fbr

input

Obtain

average

gas heat value

(at installed

altitude)

from

EAC-1
b

f_ilure.

delays

Obtain

average

gas specific

c Verif) furnace model.
58MSA furnaces

if any thermostat

and not until

by raising

local gas supplier

This feature

in case of a component

fcatu, e will

that flmaace restarts

Determine

the gas valve and humidifier

the blower

setting

temperature.

correct

furnace

thermostat

5--Adjustments

Furnace

TEST

nents to run for a short

lowering

will
speed

( OMPONENT

In Canada, the input ratings must be de*ated by 5 percent fbr
ahimdes of" 2000 ft to 4500 ft above sea level,

disap-

at HEAT

down

In the [,SA,
the input ratings fbr ahitudes above 2000 ft must be
reduced by 2 pc*cent %* each 1000 ft above sea tevel,

the R=to-W-and-Y-and=G
signals disappear at the same time,
the blower
motor BLWM will remain on for d-_e selected
blower-OFF

shut

temperature

Furnace gas input rate on rating plate is %r installations at ahimdes
up to 2000 It,

and

delay.

flmaace

SET GAS INPUT RATE

the

period

after a 3 second

Verify
room

of the

disappears,

Verify

below room

then come back

signal

inducer
speed

are

Table

gravity

flora local gas supplier.

11 can only be used fbr model

d Find installation ahimde in Table 11

completed.
To Begin

Component

NOTE: For Canadian altitudes of 2001 to 4500 It, use USA,
altitudes of" 2001 to 3000 ft in Table 11,

Self=Test:

e
ELECTRICAL

SHOCK

Failure

d_is warning

to %ltow

personal

injury,

or death.

Blower

access

panel

control

center

HAZARD
could result

door

switch

No component

must be taken when

opens

operation

manually

in electrical

closing

l15=v
can occur.

this switch

£ Follow

shocL

power

Find closest
Table 11
heat

intersection
settings

natural

gas heat value

value

and specific

to find

for proper

orifice

size

and specific

gravity
and

lines

gravity

to point

mani%ld

pressure

operation

Caution

for service

purposes.
1. Remove

blower

2. Disconnect

access

the fl-_ermostat R lead from furnace

3. Manually

close blower

4. For approximately
on control
terminals.

longer

door

control.

switch.

2 sec, short 0umper)

to the TEST/TWIN

hal on control

NOTE:

door.

_SEAL

the COM-24V terminal

3/16=inch

quick-connect

until the LED goes out. Remover

termi=

jumper

REGULATOR
/_ADJUSTMENT

from

(See Fig. 33.)

If TEST/TWIN

SCREW

and

than 2 sec, LED

will

(o_,>24v

terminals

flash rapidly

are jumpered

and ignore

component

REGULATOR

test request
Component

REGULATOR
CAP

(PROPANE

test sequence

a. LED will
b. Inducer

display
motor

component
c. After

NATURAL

is as fbllows:
previous

starts

status

code 4 dines.

and continues

to run until

ADJUSTMENT

INLET
PRESSURE

the hot surfSce

igniter

is energized

- SILVER

TAP

for 15

sec_ then off'.
d. Blower

motor

operates

on HEAT

speed

for 10 sec.

e. Blower

motor

operates

on (OOL

speed

for 10 sec.

£ Inducer

motor

stops.

5. iReconnect R lead to furnace contiot, remove
door switch, and re=install blower door.
6. Operate

thmace

per instruction

6 TURNS
10 TURNS)

GAS PRESSURE
REGULATOR

Step g of

test sequence

7 seconds

SPRING
- WHITE,

tape from blower
A03142

Fig. 4g--Redundant

on outer door.

Automatic

Gas VNve

Table11--Mode{g8MSA
(Tabulated
ALTITUDE
RANGE
(FT)

OF NATURAL

GAS

0.82

0.64

0.55

(BTUICU FT)

Manifotd
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

85O

3.7

3.8

3.2

3.3

3.4

875

3.5

3.6

3.7

3.8

3.2

9OO

3.7

3.4

3.5

3.6

3.7

925

3.5

3.7

3.8

3.4

3.5

95O

3.4

3.5

3.6

3.7

3.8

975

3.2

3.3

3.4

3.5

3.6

1000

3.7

3.8

3.2

3.4

3.5

1025

3.5

3.7

3.2

3.3

1050

3.3

3.4

3.5

3.7

3.8

1075

3.2

3.3

3.4

3.5

derate

1t00

3.6

3.7

3.2

3.4

3.5

SPECIFIC GRAVITY

OF NATURAL

GAS

AVG GAS
HEAT VALUE
AT ALTITUDE
(BTUICU FT)

Orifice
No.

Manifotd
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifotd
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

0.58

0.50

0.52

0.64

0.55

U.S.A.

775

3.8

3.2

3.3

3.4

3.5

Altitudes

8O0

3.5

3.7

3.8

3.2

3.3

200i to

825

3.8

3.4

3.6

3.7

3.8

3000

850

3.6

3.7

3.8

3.5

3.6

or
Canada

875

3.4

3.5

3.6

3.7

3.4

90O

3.2

3.3

3.4

3.5

3.6

Altitudes

925

3.7

3.8

3.2

3.3

3.4

2001 to

950

3.5

3.7

3.8

3.3

4500

975

3.3

3.4

3.5

3.8

1000

3.1

3.2

3.4

3.5

derate

1025

3.0

3.t

3.2

3.3

3.4

SPECIFIC GRAVITY

OF NATURAL

GAS

AVG GAS
HEAT VALUE
AT ALTITUDE
(BTUICU FT)

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

750

3.7

3.8

3.3

3.4

3.5

775

3.5

3.6

3.7

3.8

3.2

80O

3.7

3.4

3.5

3.6

3.7

825

3.5

3.6

3.8

3.4

3.5

85O

3.3

3.4

3.5

3.7

3.8

875

3.8

3.2

3.3

3.5

3.6

9OO

3.5

3.7

3.8

3.3

3.4

925

3.4

3.5

3.7

3.2

950

3.2

3.3

3.4

3.5

3.7

975

3.0

3.2

3.3

3.4

3.5

derate

iO00

2.9

3.0

3.t

3.2

3.3

ALTITUDE
RANGE
(FT)

300i
C

0.50
Orifice
No.

ALTITUDE
RANGE
(FT)

SPECIFIC GRAVITY
0.58
Manifotd
Pressure

20OO

AVG GAS
NEAT VALUE
AT ALTITUDE

Orifice
No.

Orifice Size and Manifold Pressure for Correct input
Data Based on 20,000 Btuh per Burner, Derated 2% for Each 1000 Ft Above Sea Level)*

to
4000

0.58

0.50

0.52

_Odfice numbers 45 are factory installed.
Percents of derate are based on midpoints

of U.S. altitude ranges.

0.64

0.55

Table 11--Model 58MSA Orifice Size and Manifold Pressure for Correct Input
Continued
(Tabulated Data Based on 20,000 Btuh per Burner, Derated 2% for Each 1000 Ft Above Sea Levem)*
ALTITUDE
RANGE
(FT)

SPECIFIC GRAVITY
0.58

0.80

OF NATURAL

GAS

0.82

8.84

8.85

(BTUiCU FT)

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifotd
Pressure

Orifice
No.

Manifotd
Pressure

Orifice
No.

Manifold
Pressure

725

3.7

3.8

3.2

3.3

3.4

750

3.4

3.5

3.7

3.8

3.2

775

3.7

3.8

3.4

3.5

3.7

800

3.5

3.6

3.7

3.8

3.4

825

3.2

3.4

3.5

3.6

3.7

850

3.7

3.8

3.3

3.4

3.5

875

3.5

3.8

3.7

3.2

3.3

5000

900

3.3

3.4

3.5

3.8

925

3.1

3.2

3.3

3.4

3.8

derate

950

3.0

3.t

3.2

3.3

3.4

4001
O

<."

AVG GAS
HEAT VALUE
AT ALTITUDE

ALTBTUDE
RANGE
(FT)

AVG GAS
HEAT VALUE
AT ALTITUDE

SPECIFIC GRAVITY
0.58

0.80

OF NATURAL

GAS

0.82

8.84

8.88

(BTUiCU FT)

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifotd
Pressure

Orifice
No.

Manifotd
Pressure

700

3.6

3.7

3.2

3.3

3.4

725

3.4

3.5

3.6

3.7

3.8

750

3.6

3.7

3.4

3.5

3.6

775

3.4

3.5

3.6

3.7

3.4

800

3.2

3.3

3.4

3.5

3.6

825

3.8

3.7

3.2

3.3

3.4

850

3.4

3.8

3.2

875

3.2

3.3

3.4

3.8

3.7

6000

900

3.0

3.1

3.3

3.4

3.8

925

2.9

3.8

3.1

3.2

3.3

950

2.7

2.8

2.9

3.0

3.t

975

2.8

2.7

2.8

2.9

iO00

2.5

2.8

2.7

2.8

500t

11%
derate

OF NATURAL

GAS

AVG GAS
HEAT VALUE
AT ALTITUDE
(BTUICU FT)

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

650

3.2

3.3

3.4

3.5

3.6

675

3.6

3.7

3.8

3.2

3.3

700

3.8

3.4

3.6

3.7

3.8

725

3.6

3.7

3.8

3.4

3.5

750

3.3

3.4

3.6

3.7

3.8

775

3.8

3.2

3.3

3.4

3.5

800

3.5

3.7

3.8

3.2

3.3

7000

825

3.3

3.4

3.8

3.7

3.8

t3%

850

3.1

3.2

3.4

3.8

3.6

derate

875

3.8

3.t

3.2

3.3

3.4

ALTITUDE
RANGE
(FT)

6001
O

SPECIFIC GRAVITY

0.58

0.88

0.82

*Orifice numbers 45 are factory installed
Percents of derate are based on midpoints

of U.S. altitude ranges

8.84

0.85

Table 11--Model 58MSA Orifice Size and Manifold Pressure for Correct Input
Continued
(Tabulated Data Based on 20,000 Btuh per Burner, Derated 2% for Each 1000 Ft Above Sea Levem)*
ALTITUDE
RANGE
(FT)

GAS
0.5.4

0.99

(BTUICU FT)

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

929

3.8

3.3

3.4

3.5

3.6

990

3.5

3.7

3.8

3.2

3.3

975

3.8

3.4

3.5

3.6

3.7

700

3.5

3.6

3.8

3.4

3.5

799

3.3

3.4

3.5

3.6

3.7

750

9.7

3.8

3.3

3.4

3.5

775

9.9

9.7

9.8

3.3

8000

800

3.3

9.4

9.5

9.9

3.7

19%

895

3.t

3.2

3.3

9.4

3.5

derate

890

2.9

3.0

3.1

9.2

3.9

AVG GAS
NEAT VALUE
AT ALTITUDE

SPECIFIC GRAVITY
0.58

0.90

OF NATURAL

GAS

0.92

0.64

0.69

(BTUiCU FT)

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifotd
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

900

3.8

3.3

3.4

3.5

3.6

929

3.5

3.6

3.8

3.2

3.3

990

3.7

3.4

3.5

3.6

3.7

975

3.5

3.6

3.7

3.8

3.4

700

3.2

3.3

3.4

3.6

3.7

799

9.9

3.8

3.2

3.3

3.4

9000

750

9.4

9.5

9.9

3.8

3.2

17%

779

9.2

3.3

3.4

9.9

3.9

8OO

3.0

9.t

3.2

9.9

3.4

800t
o
to

derate

SPECIFIC GRAWTY

OF NATURAL

GAS

AVG GAS
NEAT VALUE
AT ALTITUDE
(BTUICU FT)

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

Orifice
No.

Manifold
Pressure

979

3.8

3.2

3.3

3.5

3.6

900

3.5

3.6

3.7

3.2

3.3

929

3.7

3.8

3.5

3.6

3.7

950

3.4

3.5

3.7

3.8

3.4

975

9.8

3.3

3.4

3.5

3.6

700

3.9

9.7

9.8

3.3

3.4

t0,000

795

3.3

3.4

3.9

9.7

3.8

19%

750

3.1

3.2

3.3

3.4

3.5

derate

779

2.9

3.0

9.1

3.2

3.9

ALTITUDE
RANGE
(FT)

900t
C

OF NATURAL

0.92

Orifice
No.

ALTITUDE
RANGE
(FT)

0.90

Manifold
Pressure

SPI=CIFIC GRAVITY
0.58
Orifice
No.

700t

AVG GAS
NEAT VALUE
AT ALTITUDE

0.58

0.90

0.92

*Orifice numbers 45 are factory installed.
Percents of derate are based on U.S. altitude ranges.

0.54

0.99

EXAMPLE:
Heating

2000

value

altitude)

1050 Bmicu

Specific gravity
062
Therefore:
Orifice No. 45
Manifold

pressure

3 6=in

* Furnace is shipped with No. 45 orifices. In this example
all main burner orifices are the correct size and do not need
to be changed

Check

to obtain

and verify7 burner

ORIFI(E

SIZE;

2. Adjust
NOTE:

the proper

orifice

ALWAYS

maniibld

pressure

Manifold

pressure

input rate.

size in fhnaace. NEVER

CHECK

always

burner

b. Remove

cap that conceals

regulator.
c Jumper

enclosure

(See Fig

be measured

with burner

always

A93059

be clocked

Fig. 47--Burner

adjustment

manifold

screw,

pressure

a. Calculate
connections

on control

United

to start

counterclockwise

or clockwise

(out)

to decrease

(in) to increase

multiplier

manifbld

has been

approved

for a manifold

of 32 in. wc to 3.8 in. wc when installed

at ahimdes

For ahimdes

pressure

from 22
range,

above

2000 ft, the manil:bld

in. wc to 3.8 in. wc. If manifold

change

burner

orifices

to obtain

is outside

(if required).

ft.

100,000 Btuh input furnace installed at 4300 ft.

Furnace input Rate
at Sea Level

Derate
Multiplier
Factor

Furnace Input Rate
at Installation
Altitude

100,000

0.91

91,000

can be adjusted

pressure

up to 2000

adjustment

ihctor.

EXAMPLE:

This furnace

high-altitude

States

At altitudes above 2000 R, this Nrnace has been approved for a 2%
&rate for each 1000 R above sea level. See Table 12 ibr &rate

pressure
NOTE:

Orifice

screw fk_r gas valve

46.)

operation.

d. Turn adjusting

ORIFICE

flout.

R and W thermostat

f_/rnace

----

input rate

enclosure
fiont REMOVED
Gas meter must
with burner enclosure
front INSTALLED.
a Remove

BURNER

ASSUME

AND VERIFY

to obtain
must

this

in this range.

Canada

-->

tNIT

DAMAGE

HAZARD

to ibllow

this caution

Failure
tifc

DO NOT

bottom

out

may result

gas valve

This can result in unregulated
excess
NOTE:
been

regulator

manit\_ld

overfire

and heat exchanger

If orifice

hole appears

re&illed,

correct

size.

aligned

orifice

check
Never

orifice
re&ill

e. Replace

screw

b Reinstall burner box cover.

and result in
c. Gas valve

failures.
or it is suspected

hole with
an orifice.

a numbered
A burr=fi'ee

for proper

gas valve regulator

furnace

adjusting

pressure

damaged

hole is essential

in reduced

At installation altitudes fiom 200! to 4500 it, this _:_/macemust be
&rated 5% by an aud_orized Gas (;onve*sion Station. To determine con'ect input rate for ahimd< see example above and use
095 as derate multiplier fhctor.

flame

adjustment

to have

&ill
and

bit of

squarely

Turn

Start furnace

seal cap MUST

off all other gas appliances
and let operate

be installed

and pilots.

for 3 minutes

i_ Measure time (in sec) ibr gas meter
revolution

characteristics.
screw

regulator

test dial to complete

cap.

g. Reibr to Table 13 %r cuft of gas per hr.
i\ Replace
burner enclosure
fi'ont
input rate using method outlined

[TNTT DAMAGE

and veri/_
in item 3.

adjusted

gas

h. Multiply gas rate (cu flihr) X heating value (Bmicu it)
using natural
gas heating
value from local gas
utility/supplier

HAZARD

Failure

to follow

damage

due

t_is

caution

flame

may

result

impingement

in component

of burners

and

heat

Table 12--Ntitude

Derate MuNplier

for U.S.A.

exchangers.
DO NOT
round

re&ill

holes,

misdirection

orifices.

etc.)

of burner

g. Look through
burner flame.
tlansparent.
h. Remove

pipes,

&illing

excessive

flames.

(burrs.

burner

ALTITUDE

out=of =

noise

{FT}
0--2000

and

(See Fig. 47.)

jumper

sure

fiom R and W.

gas input rate by clocking
all pressure

robing,

gas meter.

cornbustion=air

and vent

front are in place when checking

input

% OF
BERATE

DI=RATE MULTiPLiER
FACTOR FOR U.S.A*

1.00

4--6

0.95

3001--4000

6--8

0.93

4001--5000

8--10

0.91

8001--6000

10--12

0.89

6001--7000

12--14

0.87

7001--8000

14--16

0.85

8001--9000

16--18

0.83

9001--10,000

18--20

0.81

2001--3000

sight glass in burner enclosure
and check
Burner flame should be clear blue, ahnost

and bunaer enclosure

by clocking

Improper
cause

(See Fig. 480

3. Verii}- natural
NOTE:

can

* Derate multiplierfactoris based on midpoint altitude for altitude range.

gas meter.

BURNER FLAME'-_

EXAMPLE:

BURNER

Furnace

input

Bm heating

2000 fi altitude)
fi'om rating

input

Heating value of gas
Time for 1 revolution
Gas rate

975 Btuicu 1:i
of 2-cu fl dial
70 sec

input

adjustment

Table

103 X 975

example,

the

is within

orifice
!2

SET TEMPERATURE

Bmh.

ft X cu ftihr

103 cu ftihr (f?om

Bm heating
In this

plate is 100,000

Bmicu

11)

100,425

size

percent

and

Btuh

manifbld

pressure

of the fl/mace

input rate.

RISE

MANIFOLD J
A89020

Fig. 48--Burner
Table 13--Gas
SECONDS
FOR 1
REVOLUTION

SIZE OF TEST DIAL
I
2
5
cuff
cu fl
cu fl

Flame

[NIT

DAMAGE

Failure

Rate {Cu Ft/Hr)
SECONDS
FOR 1
REVOLUTION

SIZE

heat exchangers
OF

TEST
2

cu fl

this caudon

rise must

rating

plate.

Recommended

range

or slightly

360
327
300
277
257

720
655
600
555
514

1800
1636
1500
1385
1286

50
51
52
53
54

144

360

141

355

138

346

136

340

133

333

15
16
17
18
19

240
225
212
200
189

480
450
424
400
379

1200
1125
1059
1000
947

55
56
57
58
59

131

327

129

321

126

316

exchanger

124

310

practice

122

305

20
21
22
23
24

180
171
164
157
150

360
343
327
313
300

900
857
818
783
750

60
62
64
66
68

60
58

120
116

300
290

112

281

54
53

109
106

273
265

25
26

144
138

288
277

720
692

70
72

103

257

100

250

133

267

667

243

129

257

643

237

124

248

621

231

120

240

600

225

116

232

581

220

113

225

563

214

109

218

545

209

106

212

529

205

103

206

514

200

36
37

100
97

200
195

500
486

92
94

39
38

78
76

196
192

189

474

188

185

462

184

180

450

100

180

176

439

102

178

172

429

104

173

167

419

106

170

terminal

164

409

108

167

original

160

400

110

164

157

391

112

161

153

383

116

155

150

375

120

150

147

367

124

145

Determine

be within

limits

as possible

and supply

Be sure

thermon_eters

so that radiant

tlaern_ometer

readings

fl'om supply-air

perature

rise.

3. Acliust temperature
blower

speed

to increase

heat does

important

perature

stabilize,

SHOCK

Failure to %llow
or death.

this warning

115-v electrical

readings

stlaight-run
subtract

blower

temperature

as close

rise.

return-air

Follow
speed
BLOWER
The blower

this same

speed.

Increase

Decrease

blower

HAZARD
could

result in personal

power before

changing

injury

speed tap

14 for lead color identification.

Reconnect

terminal

procedure

%r proper

selection

of (OOL

selection
OFF DELAY
offdelay

(HEAT

MODE)

has 4 adjustable

Table 14--Speed
COLOR
Black
(When Present)
Blue
Red
White

mode,
termi-

blower motor speed lead
and relocate
it to HEAT

settings

h'om 90 sec to 180

sec. (See Table 15.) The blower off delay jumpers
the fl/rnace control board (See Fig. 33) To change

Yellow

tern:

air tem-

rise.

nal. (See Fig 33) Select desired
fi'om 1 of the other motor leads
See Table

This

ducts.

4. To change blower motor speed selections
for heating
remove blower motor lead J:'rom control center HEAT

lead on SPARE

do not see heat

to detemaine

rise by adjusting

to redtlce

ducts

not affect

with

temperature

ELECTRICAL

Disconnect

of rise

rise as fbllows:

in return

is particularly

2. When

on hlmace

is at mi@oint

above.

thermometers

fi/rnace

d-xe

exchanger

specified

operation

and ac[iust air temperature

1. Place

in overheating

flue gases in heat

for condensate.

Temperature

10
11
12
13
14

may result

or condensing

areas not designed

DIAL

HAZARD

to fbllow

are located on
the blower off

Selector

SPEED

FACTORYSHIPPED
CONNECTION

High

Cool

Medium High
Medium Low

Spare
Heat

Low
Common

Spare
Corn

Table18--BlowerOff DelaySetupPosition

PiNS

1 AND 2

2 AND 3

3 AND 4

4 AND 8

Time (in sec)

120

150

180

board

move

the jumper

to the pins used

blower

off delay

SET THERMOSTAT
When

using

anticipator
circuit.

thermostat
method

HEAT

amp

subbase

be taken

after

Connect

ammeter

Factoiw

should

measurements

has

obtained

and furnace

in Fig.

49.

manufacturer's
raving

instructions

heating

should

for adjusting

covers

set cycle

SAFETY

the safety

is complete.

pressure

were all checked

switch

as part of nom_al

operation.

Step

l--Check

Primary

This

control

shuts

off

blower

The

anticipator

of checking

limit

gas

opening

should

be unblocked

this method

to check

be_bre

valve,

system

and

overheats

control

energizes

is to gradually

air-

block

off

of at least
return-air

to pem_it nora?HI air circulation.
limit control,

it can be established

this test, cause

Step

2--Check

This

control

operation

must be determined

Pressure
pIoves

By
that

and con'ected.

Switch

opeiation

draf_ inducer

(heel<

switch

as fbllows:

1. Turn off 115-v power

to furnace.

TERMINALS
WITH
THERMOSTAT
REMOVED

FROM UNIT 24-VOLT
TERMINAL BLOCK
EXAMPLE:

5 0 AMPS
10 TURNS

ON AMMETER
AROUND
JAWS

= 0.5 AMPS

FOR

THERMOSTAT

SETTING

A80201

Fig. 49--Amp

Review

7. Leave

section

limit is t\mctioning
properly
and operates if there is a restricted
return-air
duct or motor _i_ilure. If limit control does not [hnction
during

Verify

and

Recommended

return air aker furnace has been operating
for a period
5 minutes. As soon as limit control has shut offburners,
using

Put away

5. Check
lions.

Control

control

it" fm'nace

this

per hour.

in the Start=up procedure

Limit
gas

motor

immediately.

Determine

properly

and correct

to _i/rnace.
leads,

reinstall

main

furnace

door,

supply.

tools and instruments.

flame

3. Verify
that
installed.

and for

that must be checked
sensor,

down

did not function

CHECKUST

See thermostat

rate for 3 cycles

flame

furnace

motor

thermostat

CONTROLS

controls

the installation

method

heat

inducer

is heating.

The

4. Cycle

thermostat,
CHECK

circulating

measurement.

igniter
status

and mm on 115=v power

cycle tengd_.

For an electronic

This section

cun'ent

When

surface

motor

6. Reconnect

anticipator
should NOT be in the circuit while measuring
current.
If them_ostat has no subbase, the them?ostat must be disconnected
from R and W wires during

status

1 minute

hot

code LED flashes

5. Turn off 115=v power

an easy

The anap reading

started

as shown

lead

in R-W

R and W. Fig. 49 illustrates

motor

wires

can

heat

and wait

properly,

and control

them_ostat,

these measurements.

blower

NOT glow,

shut

them_ostat

motor

code 31 _imlt. [f hot sur_itce igniter g!ows when inducer
switch

the

for heat"

is _imctioning

reason pressure
condition.

draw

terminals

switch

is disconnected,

amp draw of components

inducer

to furnace.

to "call

ANTI(IPATOR

a nonelectronic

of obtaining

off delay.

Set them_ostat
pressure

is 120 sec.

must be set to match

Accurate

blower

door and disconnect

3. Turn on 115-v power

flora one set of pins on the conhol

for the desired

setting

main fi/rnace

wires flora wire harness.

4
delay setting,

Remove

Draw Check w{th Ammeter
45

rollout

manual

blower

test fi_rnace
operation

User's
literature

and

(lean

up debris.

reset switch
main

access

with room

them_ostat.

of accessories

per

Guide with
packet

owner

near furnace.

has continuity.
doors

are

manufacturer's

properly

instl_ac-

CH ECKL[ST--BNSTALLAT[ON
LOAD CALCULATION

Condensate

Drain

Heating Load (Btuh)

Unit Level or Pitched Forward

Cooling Load (Btuh)

Internal Tubing Connections
and Traps

Free of Kinks

Furnace Model Selection
External Drain Connection
Sloped

VENT PIPING
Termination

Condensate

Location

CHECKLIST--START-UP

Vent Pipe Length

Gas Input Rate (Set Within 2 percent of
Rating Plate)

Vent Pipe Elbow Quantity
from Sizing Table

Temperature

Pipe Sloped To Furnace

Thermostat

Pipe Insulation

Rise Adjusted
Anticipator

Anticipator Setting Adjusted or

Over Ceitings
Low-Ambient

Trap Primed before Start-Up

Heat Tape Installed if Required

Roof or Sidewall

Pipe Diameter Determined

Leak Tight and

Cycte Rate (3 Cyctes per Hr) Setected
Exposed Pipes

Safety Controls

Check

Primary Limit
Pressure Switch

Operation

2005

CARRIER

Manufacturer
Book
Tab

reserves

101

Corp.
the

_ 7310
right

Catalog

Morris

to discontinue,

535-80154

• Indianapolis,
or

change

Printed

IN 46231
at any

time,

in U.S.A.

58msa1
specifications

Form

or designs

58MSA-11SI

without

notice

Pg 48

and

without

2-05

incurring

Replaces:

obligations,

58MSA-10SI

lsi

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CARRIER Furnace/Heater, Gas Manual L0503144

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