Intertek ACVC96, AMVC96, GCVC96, GMVC96 Service Instructions Manual

Service Instructions

®

TM

34.5" Chassis

ACVC96/AMVC96

GCVC96/GMVC96

Gas

Furnaces

This manual is to be used by qualified, professionally trained HVAC technicians only. Goodman does
not assume any responsibility for property damage or personal injury due to improper service
procedures or services performed by an unqualified person.

The material in this manual does not supercede manufacturer's installation and operation instructions

is a registered trademark of Maytag Corporation or its related companies and is used under license. All rights reserved.

RS6612010

August 2014

Copyright © 2014 Goodman Company, L.P.

TABLE OF CONTENTS

IMPORTANT INFORMATION..................................... 2 - 5

PRODUCT IDENITIFICATION .................................. 6 - 10

ACCESSORIES .................................................... 11 - 13

INSTALLATION CONSIDERATIONS...................... 14 - 39

SYSTEM OPERATION.......................................... 40 - 44

TROUBLESHOOTING ........................................... 45 - 50

SYSTEM OPERATION COMFORTNET™ ............ 51 - 56

SERVICING .......................................................... 57 - 75

MAINTENANCE ................................................... 76 - 77

ACCESSORY WIRING DIAGRAMS ..................... 78 - 79

IMPORTANT INFORMATION

Pride and workmanship go into every product to provide our customers with quality products. It is possible, however,
that during its lifetime a product may require service. Products should be serviced only by a qualified service technician
who is familiar with the safety procedures required in the repair and who is equipped with the proper tools, parts, testing
instruments and the appropriate service manual. REVIEW ALL SERVICE INFORMATION IN THE APPROPRIATE

SERVICE MANUAL BEFORE BEGINNING REPAIRS.

IMPORTANT NOTICES FOR CONSUMERS AND SERVICERS

RECOGNIZE SAFETY SYMBOLS, WORDS AND LABELS

WARNING

T

O PREVENT THE RISK OF PROPERTY DAMAGE, PERSONAL INJURY, OR DEATH,
DO NOT STORE COMBUSTIBLE MATER IALS OR USE GASOLINE OR OTHER
FLAMMABLE LIQUIDS OR VAPORS IN THE VICINITY OF THIS APPL IANCE.

WARNING

G

OODMAN WILL NOT BE RESPONSIBLE FOR ANY INJURY OR PROPERTY DAMAGE ARISING FROM IMPROPER SERVICE OR SERVICE PROCEDURES.

I

F YOU INSTALL OR PERFORM SERVICE ON THIS UNIT, YOU ASSUME RESPONSIBILITY FOR ANY PERSONAL INJURY OR PROPERTY DAMAGE W HICH

MAY RESULT.

M

ANY JURISDICTIONS REQUIRE A LICENSE TO INSTALL O R SERVICE HEATING AND A IR CONDITIONING EQUIPMENT.

WARNING

HIGH VOLTAG E
D

ISCONNECT ALL POWER BEFOR E SERVICING OR

INSTALLING THIS UNIT.
BE PR ESENT.
DAMAGE, PERSO NAL INJURY OR DEATH.

FAILURE TO DO SO M AY CAU SE PROPERTY

MULTIPLE POWER SOURCES MAY

2

IMPORTANT INFORMATION

Speci al Warning for Installation of Furnace or Air Handling Units in
Enclosed A reas such as Garage s, Utility Ro oms or Parki ng A r eas

Carbon monoxide producing devices (such as an auto mobile, space
heater, gas water heater, etc.) should not be operated in enclosed areas
such as un ve n tilated garages, ut ility rooms or parking areas because of
the danger of carbon mo noxide (CO) poisoning resulting from the exhaust
emissions. If a furnace or air handler is installed in an enclosed area such
as a garage, utility room or parking area and a carbon monoxide producing
device is operated therein, there must be adequate, direct outside
ventilation.

This ventilation is necessary to avoid the danger of CO poisoning which
can occur if a carbon monoxide producing device continues to operate in
the enclosed area. Carbon monoxide emissions can be (re)circu l a ted
throughout the structure if t he furnace or air han dler is operating in any
mode.

CO can cause serious illness in clud ing per man e nt brain dama ge or deat h.

To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased this
product. For further assistance, please contact:

CONSUMER INFORMATION LINE
GOODMAN® BRAND PRODUCTS

TOLL FREE

1-877-254-4729 (U.S. only)

email us at:

[e-mail]

fax us at: [phone]

(Not a technical assistance line for dealers.)

(Not a technical assistance line for dealers.) Your telephone company will bill you for the call.

CONSUMER INFORMATION LINE

AMANA® BRAND PRODUCTS

TOLL FREE

1-877-254-4729 (U.S. only)

email us at:

[e-mail]

fax us at: [phone]

(Not a technical assistance line for dealers.)

Outside the U.S., call 1-713-861-2500.

3

IMPORTANT INFORMATION

FOR Y OUR S AFETY READ BEFORE OPERATING

If you do not follow these instructions exactly,
a fire or explosion may result causing property
damage, personal injury or loss of life.

A. This appliance does not have a pilot. It
is equipped with an ignition device which
automatically lights the burners. Do not
try to light the burners by hand.

B. BEFORE OPERATING smell around
the appliance area for gas. Be sure to
smell next to the floor because some gas
is heavier than air and will settle on the
floor.

WHAT TO DO IF YOU SMELL GAS

Do not try to light any appliance.
Do not touch any electric switch;
do not use any telephone in your
building.
Immediately call your supplier
from a neighbor's phone. Follow
the gas suppliers instructions.

If you cannot reach your gas supplier,

call the fire department.

C. Use only your hand to move the gas
control switch or knob. Never use
tools. If the gas control switch or knob
will not operate, don't try to repair it,
call a qualified service technician.
Force or attempted repair may result in
a fire or explosion.

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

OPERATING INSTRUCTIONS

1. STOP! Read the safety information

2. Set the thermostat to lowest setting.

3. Turn off all electric power to the
appliance.

4. This appliance is equipped with an
automatic ignition system which
automatically lights the burners. Do not
try to light the burners by hand.

5. Remove control access panel.

6. Move the gas control switch or knob
to "OFF ".

GAS CONTROL
SWITCH SHOWN
IN "ON" POSITION

7. Wait five (5) minutes to clear out any
gas. If you then smell gas, STOP!above on this label.
Follow "B" in the safety information
above on this label. If you don't smell
gas, go to the next step.

8. Move the gas control switch or knob
to "ON".

9. Replace control access panel.

10. Turn on all electric power to the
appliance.

11. Set the thermostat to the desired
setting.

12. If the appliance will not operate,
follow the instructions "To Turn Off Gas
To Appliance" and call your service
technician or gas supplier.

TO TURN OFF GAS TO APPLIANCE

1. Set the thermostat to its lowest setting.

2. Turn off all electric power to the
appliance if service is to be performed.

3. Remove control access panel.

4. Move the gas control switch or knob
to "OFF". Do not force .

5. Replace control access panel.

WARNING: Improper
alteration, service or

maintenance can
cause injury or
property damage.

Refer to the user's
information manual
provided with this

consult a qualified
or the gas supplier.

This furnace must be

instructions and local
codes. In the absence
of local codes, follow
the National Fuel Gas

Code, ANSI Z223.1.

For indoor installation.

PGB & PGJ
For outdoor
installation only .

If notWARNING:

installed, operated
and maintained in
accordance with the
manufacturer's
instru ctions, this
product could expose
you to substances
in fuel combust ion
which can cause
death or serious
illness and which
are known to the
State of California to
cause cancer, birth
defects or other
reproductive harm.
This product contains
fiberglass insulation.
Fiberglass insu la tion
contains a chemic al

California to cause
cancer.

FOR YOUR SAFETY

other flammable vapors and liquids in the vicinity of this
or any other app liance.

4

Do not store or use gasoline or

0140F00001P

IMPORTANT INFORMATION

CONSIGNES DE SECURITE - LIRE

AVANT D'ALLUMER L'APPAREIL

AVERTISSEMENT: Le non-respect des in structions qui suivent peut

^

entrainer un r i sque d'incendie ou d'explosion causant des dommages,
des blessures ou la mort.

A. Cet appareil comporte pas de veilleuse. Il est muni d'un mecanis m e qui allume
automatiquement le bruleur. N

B. Sentir tout autour de l'appariel AVANT D'ALLUMER afin de deceler toute fuite de gaz.
Assurez-vous de sentir tout pres du plancher car certains gaz sont plus lourds que l'air
et se deposeront sur le plancher.

SI VOUS SENTEZ UNE ODEUR DE GAZ:
Ne tentez d'allumer aucun appariel.

Ne touchez pas aux interrupteurs electriques; n'utiliser aucun telephone
dans l'edifice ou vous vous trouvez.
Appelez immediatement votre fournisseur de gaz en utilisant le telephone
d'un voisin et suivez les instructions du fournisseur.
Appelez les pompiers si vous ne parvenez pas a rejoindre votre fournisseur
de gaz.

C. N'utiliser que votre main pour pousser ou tourner le commande du gaz. N'utilisez
jamais d'outils. Si vous ne parvenez pas a pousser ou a t ourner la commande, ne tentez
pas de la reparer; appelez un reparateur qualifie. Forcer la commande ou essayer de la
reparer peut entrainer un risque d'incendie ou d'explosion.

D. N'utilisez pas cet appareil si l'une de ses parties a ete dans l'eau. Si cela se produit,
demandez immediatement a un reparateur qualifie d'insp ecter l'appareil et de remplacer
toute piece du systeme de controle et toute commande de gaz ayant ete dans l'eau.

^^

'allumez paz le bruleur manuellement.

^

^

0140F00002P

1. UN INSTANT! Lisez d'abord les consignes

INSTRUCTIONS DE SERVICE

d e securi te ci-dessus.

2. Reglez le thermostat a son point le plus bas.

3. Coupez l'alimentation electrique de l'appareil.

4. Cet appareil est muni d'un mecanisme qui
allume automatiquement le bruleur. Ne tentez
pa s d'allum er le bruleur manuellement.

5. Retirez le panneau d'acces de la commande.

6. Mettez la commande de gaz a la position

^

ARRET ("OFF").

7. Attendez cinq (5) minutes afin de permettre a
t ou t gaz present d'etre evacue. Si vous sentez
une odeur de gaz a ce moment, ARRETEZ! et
suivez les consignes de securite donnees au
paragraphe B ci-dessus. Si vous ne sentez pas
de gaz, passez a l'etape suivante.

8. Mettez la commande de gaz a la position
MARCHE ("ON").

9. Remettez la panneau d'acces de la commande
en plac e.

10. Retablissez l'alimenation electrique de l'appareil.

11. Reglez le thermostat a le temperature desiree.

12. Si l'appareil ne fonctionne pas, suivez les
instructions intitulees "Arret du gaz" et appelez un
reparateur qualifie ou votre fournisseur de gaz.

1. Reglez le thermostat a son point le plus bas.

2. Coupez l'alimentation electrique de l'appareil si vous devez effectuer un entretien.

3. Retirez le panneau d'acces de la commande.

4. Mettez la commande de gaz a la position ARRET ("OFF").

5. Remettez le panneau d'acces de la commande en p lace.

^

^

^

^

^

^

ARRET DU GAZ

Commande de
gaz en position

"MARCHE"

^

5

PRODUCT IDENTIFICATION

The model and manufacturing number are used for positive identification of component parts used in manufacturing.
Please use these numbers when requesting service or parts information.

G M V C 96 080 4 C N A A

PRODUCT

TYPE :

G: Go od m a n
A: Amana®

Brand

D: A m ana®

Distinctions™
Brand

M: Upflo w/Horizon tal
D: De cidated Downflow
C: Downfl ow/Horiz on tal
H: High Air Flow

FURNACE

TYPE

E: T wo-Stage/
S: Single-Stage /
V: T wo Stage/
Spee d

H: Two Sta ge
Gas Valve -

SUPPLY TYPE

COMMUNICATION FEATURE

C: 4-Wire Communicatio n Ready

X-13 Mot or
Multi-Speed
Varia ble-

Multi-Speed

NOMI NAL I NPUT

040: 40,000 Bt uh
060: 60,000 Bt uh
080: 80,000 Bt uh
100: 100,000 Bt uh
120: 120, 000 B tu h

AFUE

8: 80%
9: 90%

95: 95 %

AIRFLOW

CA PABILITY

@ 0.5" E SP

3: 12 00
4: 16 00
5: 20 00

CABINET

WIDTH

A: 14"
B: 17- 1 /2"
C: 21 "
D: 24 - 1 /2"

MAJOR REVIS ION

A: In itial R e le ase

MI NOR REVI S ION

A: In itial R e le ase

ADDITIONAL

FEA TURE S

N: Natural Gas
X: L o w N O x

6

PRODUCT IDENTIFICATION

MODEL: GMVC96 REV AA

Equipment Ty pe Goodman Brand Residential Gas Furnace
Heating Stages Two
Cooling Stages Two
Control Type ClimateTalk
Blowe r Motor Type 4 Wire Variable Speed ECM

GMV C96

Installation Positions
BTUH Input Low Fire (X 1000)
BTUH Input High Fire (X 1000)
A/C Capable Tons
Cabinet Hig ht "
Cabinet Width "
Heating CFM @ 100% Firing Rate
Draft Inducer
Gas Valve
24 VAC Heating Inputs
24 VAC Cooling Input s
Primary He at Exchanger

Accessory Terminals

Gas Line Entry

Revision Attributes

Two Speed
Two Stage
W1 / W2
Y1 / Y2
Alum inized Steel
EAC terminal, Field Powered H UM IN / HUM OUT terminals, Single Hu m termi nal

powered simultaneously with draft inducer, AUX circuit
Left or Right

First revision of 34.5" two stage commu nicating capable up flow furnace

MODEL: AMVC96

Equipment Type Amana Brand Residential Gas Furnace
Heating Stages Two
Cooling Stages Two
Con tro l Type ClimateTalk
Blower Motor Type 4 Wire Variable Speed ECM

™ or Conventional 24 Volt

0403BN 0603BN 0803BN 0804CN 1005CN 1205DN

UF, Hor L/R UF, Hor L/R UF, Hor L/R UF, Hor L/R UF, Hor L/R UF, Hor L/R

30 45 60 60 75 90
40 60 80 80 100 120

1.5 - 3 1.5 - 3 1.5 - 3 2 - 4 1.5 - 5 2 - 5

34.5 34.5 34.5 34.5 34.5 34.5

17.5 17.5 17.5 21 21 24.5
553 1059 1316 1337 1870 1940

REV AA

™ or Conventional 24 Volt

MODEL: GCVC96 REV AA

Equipment Typ e Goodman Brand Residential Gas Furnace
Heating St a ge s Two
Cooling Stages Two
Con t rol Type ClimateTalk

™ or Conventional 24 Volt

Blow e r Mo tor Ty p e 4 Wire Variable Speed ECM

GCV C9 6

Installati on P ositions CF, Hor L/R CF, Hor L/R CF, Hor L/R CF, Hor L/R CF, Hor L/R CF, Hor L/R
BTUH Input Low Fire (X 1000) 30 45 60 60 75 90
BTUH Input Hi gh Fire (X 1000) 40 60 80 80 100 120
A/C Capable Tons 1.5 - 3 1.5 - 3 2 - 4 2 - 4 2 - 5 2 - 5
Cabinet Hi ght " 34.5 34.5 34.5 34.5 34.5
Cabinet Width " 17.5 17.5 21 21 24.5
Heating CFM @ 100% Firing Rate 1059 950 1146 1325 1797 1827
Draft Inducer
Gas V alve
24 VAC Heating Inputs
24 VAC Cooling Inputs
Primar y Heat Exchanger

Accessory Terminals

Gas L ine Entry

Revisi o n Attr i butes

0403BN 0603BN 0803BN 0804CN 1005CN 1205DN

Two Speed
Two Stage
W1 / W2
Y1 / Y2
Aluminized Steel
EAC termina l, Field Powered HUM IN / HUM OUT terminals, Single Hum term inal

powe red simultaneously wit h draft inducer, AUX circuit

Left or Right

First revi sion of 34.5" modulating counter fl ow furnace

MODEL: ACVC96 REV AA

Equipment Ty pe Amana Bra nd Residential Gas Furnac e
Heating Stages Two
Coo lin g Stages Two
Cont ro l Ty pe ClimateTalk
Blowe r M o tor Type 4 Wire Variable Speed ECM

™ or Conventional 24 Volt

AMVC96

Ins tallation Positions
BTUH Input Low Fire (X 1000)
BTUH Input High Fi re (X 1000)
A/C Capable Tons
Cabinet Hight "
Cabinet Width "
Heating CFM @ 100% Firing Rate
Draft Inducer
Gas Valve
24 VAC Heating Inputs
24 VAC Cooling Inputs
Primary Heat Exchanger

Accessory Terminals

Gas Line Entry

Revi sion Attributes

0403BN 0603BN 0803BN 0804CN 1005CN 1205DN

UF, Hor L/R UF, Hor L/R UF, Hor L/R UF, Hor L/R UF, Hor L/R UF, Hor L/R

30 45 60 60 75 90
40 60 80 80 100 120

1.5 - 3 1.5 - 3 1.5 - 3 2 - 4 1.5 - 5 2 - 5

34.5 34.5 34.5 34.5 34.5 34.5

17.5 17.5 17.5 21 21 24. 5

553 1059 1316 1337 1870 1940
Two Speed
Two Stage
W1 / W2
Y1 / Y2
Stainless Steel
EAC terminal, Field Powered HUM IN / HUM OUT term i nals, Single Hum terminal

powered simultaneously with draft induce r, AUX circuit
Left or Right

Firs t r evision o f 34.5" two st ag e c o mmunicating c apable u p flow furn ac e

ACVC96

Inst allatio n Positi o n s CF, Hor L/R CF, Hor L/R CF, Hor L/R CF, Hor L/R CF, Hor L/R CF, Hor L/R
BTUH Input Low Fire (X 1000) 30 45 60 60 75 90
BTUH Input High Fire (X 1000) 40 60 80 80 100 120
A/C Capable Tons 1.5 - 3 1.5 - 3 2 - 4 2 - 4 2 - 5 2 - 5
Cabinet Hight " 34.5 34.5 34. 5 34.5 34.5
Cabinet Width " 17.5 17.5 21 21 24.5
Heating CFM @ 100% Firing Rate 1059 950 1146 1325 1797 1827
Draft Inducer
Gas Valve
24 VAC Heating Inputs
24 VAC Cooling Inputs
Primary Heat Ex changer

Accessory Terminals

Gas Line Entry

Revision Attributes

0403BN 0603BN 0803BN 0804CN 1005CN 1205DN

Two Speed
Two Stage
W1 / W2
Y1 / Y2
Stainless Steel
EAC terminal, Field Powered HUM IN / HUM OUT term in als, Singl e Hum terminal

powered simul taneously with draft inducer, AUX circuit

Left or Right

First revision of 34.5" modulating counter flow furnace

7

PRODUCT IDENTIFICATION

MODE L # MFG # DESCRIPTION

AFE18-60A

AMU1620
AMU1625
AMU2020
AMU2025

GMU1620
GMU1625
GMU2020
GMU2025

ASAS-10
ASAS-11
ASAS-12
ASAS-18

CFSB17
CFSB21
CFSB24

N/A

P1251305F
P1251306F
P1251307F
P1251308F

N/A

P1251301F
P1251302F
P1251303F
P1251304F

N/A

Fo ssil Fuel K it.

above/do wnstream of a gas or f ossil fuel f urnace when used wit h a hea t pump. It will operate
with single and t wo stage hea t pumps and single and two stage f urnaces. The AFE 18-60A
cont rol will tu r n the heat pu mp unit off wh en the f ur nace is turned on. An ant i- short cycle
feature initiates a 3 minute timed off d elay when the compressor goes of f.

Med ia Air Cl eaner.

fur n ac e models. The Amana (A MU*) and Goodman (GMU*) Media Air Cleaner is a high
efficienc y air fil trat ion device designed to r emove dirt, dust , pollen and other microscopic
particles from th e a ir passing thro ugh it. Flexible performance range u p to 2, 000 C FM
capac ity. The air cl eaner should be installed in the system so that all the sy stem air is
circ ulated thr ou gh t he air c leaner . The air cle aner will only remove t he air b orne contaminant s
delivered to it. Maximum per formance is obtained when the syst em blower is set f or
cont in uous operation. Carbon filters (opt io nal) are available.

Electronic Air Cleaner.

Brand furnace models. T he H igh- Efficiency Electronic Air Cleaner i s designed to r emove air
cont aminant s down to .01 micr ons. Car b on filt er s (optional) re move odors. D ual in dic ator
lights show unit operation a t a glance. Electronic pr o ving switch cycles the air c lea ner On/ Off
with the system f an . Durable powder-coat paint finish resists corrosion.

C ounterflow S ubbase K it.

models ACV C9 an d GCVC9. These kits are available for the fo llow ing furnac e wid ths: 17.5"
wide (CFSB17) , 21" w ide (CFS B 21) and 24" wide (CFSB24) . The kits must b e used t o pr event
excessi ve temperat ur e from r eaching combustible mater ials, if the furnace is installed on a
combustible f loor . T his subbase effec tively separate d the furnace base and plenum fro m
combustible materia ls. To ensure safe installation, d o not install the counterf low floor base
directly on car peting, tile, or other combustible material other than wood f looring.

The AFE18-60A cont r o l is designed for use where the i ndoor coil is located

For use with c ur r ent ar c hitect ur al gr ey Goodman® and A mana® B r and

For use with current ar chitectural grey Goodman® and Amana®

For use with select Goodman® and Amana ® B r and 34.5" furnac e

CTK01AA

CTK01BA

CTK01AA

CTK01BA

Communicating Thermostat Kit-

for use with c ompat ible Amana® B rand or Goodman® Brand Air Handlers or Furnaces and
outdoo r split AC or Heat Pump units. T his the r mostat supports up to three stages of he at, two
stages of co oling, dual f uel app lic ations, dehumidification, filter maintenan c e r eminders,
outdoo r temperature display an d advanced menus including diagnostic s. The CT K 01 AA k it
includes a communicating touchscree n thermostat and sub base, 230V-24V 40va
tr an sfor mer, ter minal bloc k s(2), wire jumpers, mounting screws, insta llation manual and
homeowner guide.

Communicating Thermostat Kit-

for use with c ompat ible Amana® B rand or Goodman® Brand Air Handlers or Furnaces and
outdoo r split AC or Heat Pump units. T his the r mostat supports up to three stages of he at, two
stages of co oling, dual f uel app lic ations, dehumidification, filter maintenan c e r eminders,
outdoo r temperature display an d advanced menus including diagnostic s. The CT K 01 B A kit
includes a communicating touchscree n thermostat and sub base, t erminal blocks(2),
installat ion manual and homeowner gui de.

Digit ally communic ating touchscreen thermostat . Designed

Digit ally communic ating touchscreen thermostat . Designed

8

PRODUCT IDENTIFICATION

MODE L # MFG # DES C RIPTI O N

CTK02**

CTK03AA

CTK03AB

CTK04

CTK02**

CTK03AA

CTK03AB

CTK04AA

C ommu nicat ing Thermo st at Kit-

use with compat ibl e Amana ® Brand or Goodman® Bran d Air Handlers or Furnaces
and out door split AC or Heat Pump units. The CTK02** th er mostat featu r es a f ull c o lor
high def ini tion display , advanced programming options including hu midif ic ation control
& heat and cool maximum temperatur e set tings, a USB plug allowing dealer s t he
abilit y to insert pre-progr ammed operat in g par amet ers and dealer info r mat ion by use
of an onlin e da ta entry system.

C ommu nicat ing Thermo st at Kit-

fr o m Honeywell. De signed f or use with c ompat ib le Amana® Brand or Goodman®
Bra nd Air Handlers or Furnaces and outdoor split AC or Heat P ump unit s. The
CTK 0 3AA thermostat featu r es f ull color high definition display and can be used with
RedLINK wireless a ccessor ies.

C ommu nicat ing Thermo st at Kit-

fr o m Honeywell. De signed f or use with c ompat ib le Amana® Brand or Goodman®
Bra nd Air Handlers or Furnaces and outdoor split AC or Heat P ump unit s. The
CTK 0 3AB thermost at fe atures full c o lor hig h definit ion display and ca n be u sed with
RedLI NK wi r ele ss accessor i es and added c apa bilty to c ontrol the HUM IN - HUM OUT
relay.

C ommu nicat ing Thermo st at Kit-

fr o m Honeywell. De signed f or use with c ompat ib le Amana® Brand or Goodman®
Bra nd Air Handlers or Furnaces and outdoor split AC or Heat P ump unit s. The CTK04
thermo stat f eatures full c olo r hi gh definition display and can be used wit h Red LINK
wireless accessories a nd adde d c ap abilty to contr ol the HUM IN - HUM OUT r e lay. Split
system inverter c apabl e.

Digit ally communic a ting t her mostat . Designed for

Digit ally communic a ting t ouc hscr een thermostat

Digit ally communic a ting t ouc hscr een thermostat

Digit ally communic a ting t ouc hscr een thermostat

DCVK-20

(CVENT-2)

DCVK-30

(CVENT-3)

0170K00000S

0170K00001S

DEHUM1

N/A

N/A

N/A

P1227801F

Concentric Vent Kit.

designed to allow terminations of a dir ec t vent furnace to be "concent rically" vented
through a wall or roof. This kit allows a sing le pen etrat ion to support terminations f or
both the vent/flu e and the combustion air intake pipe. The DCVK-20 ( 2") and DCVK-30
(3" ) ki t s are cer tified for models list ed above. See specificat ion sheet s on fut ur e
models for use of the vent k i t.

Side Wall Only Concentric Vent K it

used with 2" - 3" vent systems. The vent k it must ter minat e outside the structure. This
kit is NOT int end ed for use with single pipe (i ndirect vent) insta llations.

Side Wall Only Concentric Vent K it

used only with 2" vent systems. The vent k it must ter minat e ou tside the stru c ture. This
kit is NOT int end ed for use with single pipe (i ndirect vent) insta llations.

Dehumidistat.

fur nac e models. W all mounted, 24 volt humidit y contro l available as a Dehumidistat
used to reduc e t he air flow in the air c onditioning mode when necessar y to lower the
humidity in an occupied home to pr e vent dew build- up associated with high humidity
levels. T his control featur es a moisture-sensitive nylon element and al so provides
positive ON-O FF set tings for manual oper ation. The control is a normally closed switch
that opens on humidity rise causing t he bl ower to switch to a lower speed t o c on trol t h e
humidity within the structure.

For use with Amana® B rand 90% f ur nac e models. This kit is

. F or use with 90% f ur nac e models. This kit is to be

. F or use with 90% f ur nac e models. This kit is to be

For use with Goodman® and Amana® Brand two-stage variable speed

9

PRODUCT IDENTIFICATION

MODEL # MFG # DESCRIPTION

EFR02

HASFK-1

LPLP03

LPM-08

N/A

N/A

N/A

N/A

External Filt er Rack Kit.

speed gas furnace models. This kit is intended to provide a locat ion, external to the furnace
casing, f or installation of a permanent filter. The rack is mount ed over the indoor air blower
compartment area of eit her side panel, and provide filter retention as well as a locat ion f or
att ac hing r et ur n air duc t wor k.

High Altitude Natural Gas Kit.

stage furnac e models. These kits are required when inst alling t he f ur nac es abov e t heir
maximum r ated altit ude. T he or if ic es in the kit have been select ed as a result of t esting wit h t he
American Gas A ssociation. They will pr ovide appropriate der ating at the altit ude listed in the
High Altit ude Char ts as shown in the installations of the kit.

LP Gas Low Pressure Kit.

fur nace produc ts installed on LP gas listed in this manual. This k it includes harness adaptors to
work wit h W hit e- Rodgers single & two stage gas valves,Honeywell single and two-stage gas
v alves, as well as modulating gas valves.

LP Conversion Kit.

models using a Whit e- Rodger s 36J54,, 2-stage gas v alve kit. Includes regulator springs,

1.25mm orifices, instruc tions and a label to show the furnace has been c onverted to L.P.

For use with G oodman® and A mana® Brand 90% upflow variable

Used on selected Goodman® Brand and Amana® B r and 90% two

Designed for applicat ion on Goodman® and A mana® Brand' s gas

For use with Goodman® and Amana® Brand 34.5" 2-stage variable speed

10

ACCESSORIES

96% C om Furn ace Accessories

Model

Number

Description

*MVC960403BN**XXXX X

*MVC960603BN**XXXX X

*MVC960803BN**XXXX X

*MVC960804CN**XXXX X

*MVC961005CN**XXXX X

*MVC961205DN**XXXX X

*CVC960403BN** X X X X X

*CVC960603BN** X X X X X

*CVC960804CN**XXXXX

*CVC961005CN**XXXXX

*CVC961205DN** X X X X X

Model

Number

Description

*MVC960403BN**XXXXXXXX
*MVC960603BN**XXXXXXXX
*MVC960803BN**XXXXXXXX
*MVC960804CN**XXXXXXXX
*MVC961005CN**XXXXXXXX
*MVC961205DN**XXXXXXXX
*CVC960403BN**XXXXXXXX
*CVC960603BN**XXXXXXXX
*CVC960804CN**XXXXXXXX
*CVC961005CN**XXXXXXXX
*CVC961205DN**XXXXXXXX

AFE180- 60A AMU / GMU EFR02 ASAS / GSAS CFSB17 CFSB21 CFSB24 RF000142

Fossil

Fuel

Kit

CTK01* CTK02 * CTK0 3 * CTK04 * 0 170K0 0 0 0 0 S 0170K0 0 0 01S

Com.

Thermostat

Kit

Media Air
Cleaners

Com

Thermostat

Kit

Modulating,

High Def

Externa l

Filter
Rack

Com

Thermosta

Kit

Modulating,

High Def

Electronic

Air

Cleaner

Com

Thermosta t

Kit

Modulating,

High Def

Downflow
Subba se

17.5"

Conce ntric

Side Wall

Vent Kit (3")

Downflow

Subbase

21"

Conce ntric

Side Wall

Vent Kit (2")

Downflow

Subbase

24.5"

DCVK- 20

(CVENT- 2 )

Conce ntric

Vent Kit (2")

Drain

Coupling

Kit

DCVK- 30

(CVENT- 3 )

Conce ntric

Vent Kit (3")

Model

Number

Description Dehumidista t L.P. Kit

*MVC960403BN**XXXX

*MVC960603BN**XXXX

*MVC960803BN**XXXX

*MVC960804CN**XXXX

*MVC961005CN**XXXX

*MVC961205DN**XXXX

*CVC960403BN**XXXX

*CVC960603BN**XXXX

DEHUM1 LP M- 0 8 LPLP0 3 HASFK- 1

Low LP

Tank

Protection

High Altitude

Kit

11

ACCESSORIES

EXTERNAL FILTER RACK (EFR02)

96% Upflow Model Furnaces

FRONT

OF UNIT

BASE

OF UNIT

UNIT SIDE

PANEL

RETURN AIR

CUTOUT AREA

SLOTS IN FILTER
CLEAR SCREWS

ON UNIT

BLOWER DECK

SCREWS

LOWER EDGE

SCREW

FILTER RACK ASSEMBLY

(FACE FILTER OPENING

TOWARDS FRONT

OF UNIT)

SIDE WALL VENT KITS (0170K00000S) (0170K00001S)

Description
0170K00000S

This side wall only vent kit #0170K00000S is to be used with 2” - 3” vent systems. This kit is NOT intended for use with
single pipe (indirect vent) installations.

The vent kit must terminate outside the structure and may be installed with the intake and exhaust pipes located side-by­side or with one pipe above the other.

See the section in this manual under "Vent Flue and Combustion Air Pipe Terminations" for more information or consult
the Installation Instructions (IO-635).

0170K00001S

This vent kit is to be used with 2” vent systems. The vent kit must terminate outside the structure and may be installed with
the intake and exhaust pipes located side-by side or with one pipe above the other. This kit is NOT intended for use with
single pipe (indirect vent) installations.

See the section in this manual under "Vent Flue and Combustion Air Pipe Terminations" for more information or consult
the Installation Instructions (IO-805).

Horizontal Installation

12

Vertica l I n s tallatio n

ACCESSORIES

CONCENTRIC VENT CONVERSION KIT

The CVENT-2 (DCVK20) (2") or the CVENT-3 (DCVK-30) (3") is a concentric vent kit approved with furnaces listed in
this manual.

This concentric vent kit allows for vertical or horizontal vent termination. The illustrations give a brief view of the kit and
its application.

See the section in this manual under "Vent Flue and Combustion Air Pipe Terminations" for more information or consult
the Installation and Operating Instructions (IO-619*).

Vent

Maintain 12" (18" for Canada)
minimum clearance above highest
anticipated snow level. Maximum of

Combustion Air

24" above roof.

Roof Boot/Flashing
(Field Supplied)

Support (Field Supplied)

45 Elbow
(Field Supplied)

Vent

Combustion Air

DCVK (Vertical Installation)

AFE18-60A Dual Fuel Accessory

When installing the communicating capable furnace with a
heat pump, the preferred installation would include a com­municating thermostat. A communicating thermostat pro­vides control of gas heat and heat pump operation and elimi­nates the need for a separate dual fuel control. A legacy
dual fuel thermostat could also be used with 24 volt wiring to
control the gas furnace and heat pump. If a communicating
thermostat or legacy dual fuel thermostat are not used, the
AFE18-60A kit must be added to provide control of the equip­ment. This control is mounted indoors near the furnace and
provides terminals for thermostat, furnace, and heat pump
wiring. The AFE18-60A may be used with or without a sepa­rate outdoor thermostat.

CFSB17, 21, 24 Counter Flow Base

The CFSB base must be used when installing a *CVC96
furnace in the vertical position on a combustible floor with­out a coil under the furnace.

Vent

Combustion Air

Strap
(Field Supplied)

45 Elbow
(Field Supplied)

Combustion Air

Flush to

1" maximum

DCVK (Horizontal Installation)

LPLP03 Low LP Gas Pressure Shut-off Kit

Installation of the LPLP03 kit is recommended on every L.P.
converted furnace to protect the furnace against low L.P.
gas supply pressure. Low L.P. supply pressure can cause
poor combustion and carbon in the heat exchanger. The
LPLP03 kit will open the electrical circuit to the gas valve in
the event of low supply pressure. The kit contains a pres­sure switch, gas fittings and electrical harness to connect
the switch in series with the gas valve.

LPM-08 LP Conversion Kit

This furnace is factory equipped to operate on Natural Gas
but may be field converted to operate on L.P. gas. To con­vert a *MVC96 or *CVC96 furnace to operate on L.P. gas,
the LPM-08 conversion kit must be used. The LPM-08 kit
contains a set of 1.25 mm orifices to replace the factory
installed natural gas orifices and a set of springs to convert
the gas valve to L.P. gas.

OT18-60A Outdoor Thermostat

For use in a legacy dual fuel installation to lock-out the heat
pump at a selected temperature.

Vent

13

INST ALLATION CONSIDERA TIONS

Safety

Please adhere to the following warnings and cautions when
installing, adjusting, altering, servicing, or operating the fur­nace.

WARNING

T

O PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER INSTALLATION,
ADJUSTMENT, ALTERATI ON, SERV ICE OR MAINTENANCE, R EFER TO THI S
MANUAL.
QUALIFIED INSTALLE R, SERVICE AGENCY OR THE GAS SUPPLIER.

OR ADDITIONAL ASSISTANCE OR INFORMATION, CONSULT A

F

WARNING

HIS PRODUCT CONTAINS OR PRODUCES A CHEMICAL OR CHEMICALS WHICH

T

MAY CAUSE SERI OUS ILLNESS OR DEATH AN D WHICH ARE KNOWN TO THE

S

TATE OF CALIFORNIA TO CAUSE CANCER, BI RTH DEFECTS OR OTHER

REPRODUCTIVE HARM.

WARNING

TO PREVENT POSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH

DUE TO ELECTRICAL SHOCK, THE FURNACE MUST BE LOCATED TO PROTECT
THE ELEC TRICA L COMPON ENTS FROM WAT ER.

Charge (ESD) Precautions
NOTE: Discharge body’s static electricity before touching

unit. An electrostatic discharge can adversely affect electri­cal components.

Use the following precautions during furnace installation and
servicing to protect the integrated control module from dam­age. By putting the furnace, the control, and the person at
the same electrostatic potential, these steps will help avoid
exposing the integrated control module to electrostatic dis­charge. This procedure is applicable to both installed and
uninstalled (ungrounded) furnaces.

1. Disconnect all power to the furnace. Do not touch the
integrated control module or any wire connected to the
control prior to discharging your body’s electrostatic
charge to ground.

2. Firmly touch a clean, unpainted, metal surface of the
furnace near the control. Any tools held in a person’s
hand during grounding will be discharged.

3. Service integrated control module or connecting wiring
following the discharge process in Step 2. Use caution
not to recharge your body with static electricity; (i.e., do
not move or shuffle your feet, do not touch ungrounded
objects, etc.). If you come in contact with an ungrounded
object, repeat Step 2 before touching control or wires.

4. Discharge any static electricity from your body to ground
before removing a new control from its container. Follow
Steps 1 through 3 if installing the control on a furnace.
Return any old or new controls to their containers before
touching any ungrounded object.

Product Application

This product is designed for use as a residential home gas
furnace. It is not designed or certified for use in mobile home,
trailer, or recreational vehicle applications.

This furnace can be used in the following non-industrial
commercial applications: Schools, Office buildings, Churches,

Retail stores, Nursing homes, Hotels/motels, Common or
office areas. In such applications, the furnace must be installed

with the

Goodman® Brand and Amana® Brand 90% furnaces are
ETL certified appliances and are appropriate for use with
natural or propane gas. (NOTE: If using propane gas, a pro­pane conversion kit is required).

Dual certification means that the combustion air inlet pipe is
optional and the furnace can be vented as a:

To ensure proper installation, operation and servicing, thor­oughly read the installation and service manuals for specif­ics pertaining to the installation, servicing and application of
this product.

POSSIBLE PROPERTY DAMAGE, PERSONAL IN JURY OR DEATH DUE TO FIRE,

EXPLOSION, SMOKE, S OOT, CONDENSTAION, E LECTRICAL SHOCK OR CARBON
MONOXIDE MAY RESULT FROM IM PROPER INSTALLATION, RE PAIR, OPERATI ON,
OR MAINTENANCE OF THI S PRODUCT.

T

O PREVENT PROPERTY DAMAGE, PERSONAL INJ URY OR DEATH D UE TO FIRE,
DO NOT INSTALL T HIS FURNACE IN A MOBILE HOME, TRAILER, OR RECREATIONAL
VEHICLE.

To ensure proper furnace operation, install, operate, main­tain and service the furnace in accordance with the installa­tion, operation and service instructions, all local building
codes and ordinances. In their absence, follow the latest
edition of the National Fuel Gas Code (NFPA 54/ANSI
Z223.1), and/or CAN/CGA B149 Installation Codes, local
plumbing or waste water codes, and other applicable codes.

A copy of the National Fuel Gas Code (NFPA 54/ANSI
Z223.1) can be obtained from any of the following:

installation instructions.

Non-direct vent (single pipe) central forced air furnace
in which combustion air is taken from the installation
area or from air ducted from the outside or,

Direct vent (dual pipe) central forced air furnace in which
all combustion air supplied directly to the furnace burn­ers through a special air intake system outlined in
this manual and the installation instructions.

WARNING

WARNING

American National Standards Institute
1430 Broadway
New York, NY 10018

14

INST ALLATION CONSIDERA TIONS

National Fire Protection Association
1 Batterymarch Park
Quincy, MA 02269

The rated heating capacity of the furnace should be greater
than or equal to the total heat loss of the area to be heated.
The total heat loss should be calculated by an approved
method or in accordance with “ASHRAE Guide” or “Manual
J-Load Calculations” published by the Air Conditioning Con­tractors of America.

Location Requirements and Considerations

WARNING

O PREVENT POSSIBLE EQUI PMENT DAMAGE, PROPERTY DAMAGE, PERSONAL

T

INJURY OR DEATH, THE FO LLOWING BULLET P OINTS MUST BE OBSERVED
WHEN INSTALLING THE UNIT.

Follow the instructions listed below when selecting a fur­nace location. Refer also to the guidelines provided in the
Combustion and Ventilation Air Requirements section in this
manual or the installation instructions for details.

• Centrally locate the furnace with respect to the pro­posed or existing air distribution system.

• Ensure the temperature of the return air entering the
furnace is between 55°F and 100°F when the furnace
is heating.

• If the furnace is installed in an application where the
typical operating sound level of a furnace is deemed
objectionable, an optional sound reduction kit is avail­able. Consult your local distributor for more details.

• Provide provisions for venting combustion products
outdoors through a proper venting system. Special
consideration should be given to vent/flue pipe routing
and combustion air intake pipe when applicable.

90% Furnaces: Refer to the Vent/Flue Pipe and Com-
bustion Air Pipe -Termination Locations section in this

manual or the installation instructions for appropriate
termination locations. Also for 90% furnaces, refer to
the Vent/Flue Pipe and Combustion Air Pipe -Termi-
nation Locations section in this manual or the instal­lation instructions to determine if the piping system
from furnace to termination can be accomplished
within the guidelines given. NOTE: The length of flue
and/or combustion air piping can be a limiting factor
in the location of the furnace.

• Locate the 90% furnace so that the condensate can
be piped at a downward slope away from the furnace
to the drain. Do not locate the furnace or its conden­sate drainage system in any area subject to below
freezing temperatures without proper freeze protec­tion. Refer to the Condensate Drain Lines and Trap
section in this manual or the installation instructions
for further details.

• Set the 90% furnace on a level floor to enable proper
condensate drainage. If the floor becomes wet or damp
at times, place the furnace above the floor on a con­crete base sized approximately 1-1/2" larger than the
base of the furnace. Refer to the Horizontal Applica-
tions and Considerations section in this manual or
the installation instructions for leveling of horizontal
furnaces.

• Ensure upflow or horizontal furnaces are not installed
directly on carpeting, or any other combustible mate­rial. The only combustible material allowed is wood.

• A special accessory subbase must be used for up­right counterflow unit installations over any combus­tible material (including wood). Refer to subbase in­structions for installation details. (NOTE: A subbase
will not be required if an air conditioning coil is located
beneath the furnace between the supply air opening
and the combustible floor.

• Exposure to contaminated combustion air will result
in safety and performance-related problems. Do not
install the furnace where the combustion air is ex­posed to the following substances:

chlorinated waxes or cleaners
chlorine-based swimming pool chemicals
water softening chemicals
deicing salts or chemicals
carbon tetrachloride
halogen type refrigerants
cleaning solutions (such as perchloroethylene)
printing inks
paint removers
varnishes
hydrochloric acid
cements and glues
antistatic fabric softeners for clothes dryers
and masonry acid washing materials

• Isolate a non-direct furnace from an area contaminated
by any of the above substances. This protects the
non-direct vent furnace from airborne contaminants.
To ensure that the enclosed non-direct vent furnace
has an adequate supply of combustion air, vent from
a nearby uncontaminated room or from outdoors. Re­fer to the Combustion and Ventilation Air Require-
ments section in this manual or the installation in­structions for details.

• If the furnace is used in connection with a cooling
unit, install the furnace upstream or in parallel with
the cooling unit coil. Premature heat exchanger fail­ure will result if the cooling unit coil is placed in the
return air of the furnace.

15

INST ALLATION CONSIDERA TIONS

• If the furnace is installed in a residential garage, posi­tion the furnace so that the burners and ignition source
are located not less than 18 inches (457 mm) above
the floor. Protect the furnace from physical damage
by vehicles.

• If the furnace is installed horizontally, the furnace ac­cess doors must be vertical so that the burners fire
horizontally into the heat exchanger. Do not install
the unit with the access doors on the “up/top” or “down/
bottom” side of the furnace.

Clearances and Accessibility

Installations must adhere to the clearances to combustible
materials to which this furnace has been design certified.
The minimum clearance information for this furnace is pro­vided on the unit’s clearance label. These clearances must
be permanently maintained. Refer to Specification Sheet for
minimum clearances to combustible materials. Clearances
must also accommodate an installation’s gas, electrical,
and drain trap and drain line connections. If the alternate
combustion air intake or vent/flue connections are used on
a 90% furnace, additional clearances must be provided to
accommodate these connections. Refer to Vent Flue Pipe
and Combustion Air Pipe section in this manual or the in­stallation instructions for details. NOTE: In addition to the
required clearances to combustible materials, a minimum
of 24 inches service clearance must be available in front of
the unit.

A furnace installed in a confined space (i.e., a closet or
utility room) must have two ventilation openings with a total
minimum free area of 0.25 square inches per 1,000 BTU/hr
of furnace input rating. One of the ventilation openings must
be within 12 inches of the top; the other opening must be
within 12 inches of the bottom of the confined space. In a
typical construction, the clearance between the door and
door frame is usually adequate to satisfy this ventilation re­quirement.

Furnace Suspension

If suspending the furnace from rafters or joist, use 3/8"
threaded rod and 2”x2”x1/8” angle iron as shown in the fol­lowing figure. If the furnace is installed in a crawl space it
must also be suspended from the floor joist or supported by
a concrete pad. Never install the furnace on the ground or
allow it to be exposed to water. The length of rod will depend
on the application and the clearances necessary.

3/8" DIAMETER

THREADED ROD

HOLD DOWN

NUTS

SUPPORT

NUTS

GAS PIPING

2"X2"X1/8" ANGLE IRON

(3 PLACES)

EXISTING FURNACE REMOVAL

NOTE: When an existing furnace is removed from a venting

system serving other appliances, the venting system may
be too large to properly vent the remaining attached appli­ances.

The following vent testing procedure is reproduced from the

American National Standard/National Standard of Canada for
Gas-Fired Central Furnaces ANSI Z21.47, latest edition,
CSA-2.3b, latest edition Section 1.23.1.

The following steps shall be followed with each appliance connected to
the venting system placed in operation, while any other appliances
connected to the venting system are not in operation:

a. Seal any unused openings in the venting system;
b. Inspect the venting system for proper size and horizontal pitch,

c. In so far as practical, close all building doors and windows and all

d. Follow the lighting instructions. Place the appliance being in-

e. Test for draft hood equipped spillage at the draft hood relief

f. After it has been determined that each appliance connected to the

g . If improper venting is observed during any of the above tests, the

Corrections must be in accordance with the latest edition of
the National Fuel Gas Code NFPA 54/ANSI Z223.1 and/or
CSA B149 Installation Codes.

PROVIDE 8" MINIMUM CLEARANCE BETWEEN

CENTER ROD AND FURNACE CABINET

TO ALLOW FOR CIRCULATOR BLOWER REMOVAL.

ASSURE FURNACE IS LEVEL FROM

END TO END.

90% FURNACES MAKE SURE

ON

THE UNIT HAS A SLIGHT

FORWARD TILT WITH THE FRONT

OF THE FURNACE 0"-3/4"

BELOW THE BACK OF THE FURNACE.

CONDENSATE

DRAIN

TILT OUTWARD TO ALLOW FOR

DOOR AND CIRCULATOR BLOWER

REMOVAL.

(6 PLACES)

ALTERNATE
GAS PIPING

POSITION AS CLOSE AS POSSIBLE
TO BLOWER DECK TO ALLOW FOR

CIRCULATOR BLOWER REMOVAL.

90% Suspended Furnace Shown

as required by the National Fuel Gas Code, ANSI Z223.1 or the
CSA B149 Installation Codes and these instructions. Determine
that there is no blockage or restriction, leakage, corrosion and other
deficiencies which could cause an unsafe condition;

doors between the space in which the appliance(s) connected to
the venting system are located and other spaces of the building.
Turn on clothes dryers and any appliance not connected to the
venting system. Turn on any exhaust fans, such as range hoods
and bathroom exhausts, so they shall operate at maximum speed.
Do not operate a summer exhaust fan. Close fireplace dampers;

spected in operation. Adjust thermostat so appliance shall oper­ate continuously;

opening after 5 minutes of main burner operation. Use the flame
of a match or candle;

venting system properly vents when tested as outlined above,
return doors, windows, exhaust fans, fireplace dampers and any
other gas burning appliance to their previous conditions of use;

common venting system must be corrected.

16

INST ALLATION CONSIDERA TIONS

If resizing is required on any portion of the venting system,
use the appropriate table in Appendix G in the latest edition
of the National Fuel Gas Code ANSI Z223.1 and/or CSA B149

Installation Codes.

Thermostat Requirements

The optional CTK0*** thermostat kit may be used with
ComfortNet™ compatable furnaces (ACVC, AMVC, GCVC,
GMVC models). Refer to System Operation - ComfortNet™
System for details.

NOTE: A single-stage thermostat with only one heating
stage can be used to control a two-stage furnace. The ap­plication of a single-stage thermostat does not offer "true"
thermostat driven two-stage operation, but provides a timed
transition from low to high fire. The furnace will run on low
stage for a fixed period of time before stepping up to high
stage to satisfy the thermostat's call for heat. The delay
period prior to stepping up can be set at either 5 or 10 min­utes through the DIP switch adjacent to the Heat Off delay
DIP switches on the integrated control module. To use a
single-stage thermostat, turn off power to the furnace, move
the thermostat selection jumper on the integrated contro
module from the "two-stage" position to the "single-stage"
position, turn power back on. Refer to DIP switch charts on
pages 41 & 42.

NOTE: A single-stage thermostat with only one heating stage
may be used to control ComfortNet™ compatible furnaces
(ACVC, AMVC, GCVC, GMVC models). The application of
a single-stage thermostat does not offer “true” thermostat­driven two-stage operation, but provides a timed transition
from low to high fire. The furnace will run on low stage for a
fixed period of time before stepping up to high stage to sat­isfy the thermostat’s call for heat. The delay period prior to
stepping up can be set at either a fixed 5 minute time delay
or a load based variable time between 1 and 12 minutes
(AUTO mode). If the AUTOmode is selected, the control
averages the cycle times of the previous three cycles and
uses the average to determine the time to transition from
low stage to high stage.

To use a single-stage thermostat, turn off power to the fur­nace, move the thermostat selection DIP switch to the OFF
position. Set the desired transition time by setting the tran­sition delay DIP switch to the desired ON/OFF position. Turn
power back on. Refer to DIP switch charts on pages 41 &

42.

Dehumidistat Requirements

A dehumidistat can be used in conjunction with the two­stage variable speed furnace to lower the humidity in the
conditioned space. The dehumidistat will improve dehumidi­fication of the conditioned air by prompting the furnace to
reduce the speed of the circulator blower during operation in
the cooling mode. To be compatible with these furnaces, a
dehumidistat must operate on 24 VAC and utilize a switch

which opens on humidity rise. Refer to Electrical Connec-
tions - 24 Volt Dehumidistat Wiring section in this manual
or the installation instructions for correct installation proce­dure.

Thermostat and Dehumidistat Location

In an area having good air circulation, locate the thermostat
and dehumidistat (if applicable) about five feet high on a vi­bration-free inside wall. Do not install the thermostat or de­humidistat where it may be influenced by any of the follow­ing:

• Drafts, or dead spots behind doors, in corners, or un-

• Hot or cold air from registers.

• Radiant heat from the sun.

• Light fixtures or other appliances.

• Radiant heat from a fireplace.

• Concealed hot or cold water pipes, or chimneys.

• Unconditioned areas behind the thermostat and de-

Consult the instructions packaged with the thermostat and
dehumidistat for mounting instructions and further precau­tions.

COMBUSTION AND VENTILATION AIR
REQUIREMENTS

OSSIBLE PROPERTY DAMAGE, PERSONAL I NJURY OR DEATH MAY OCCUR

P

IF THE FURNACE I S NOT PR OVIDED WITH ENOUGH FRESH AIR FOR PROPER
COMBUSTION AND VENTIL ATION OF F LUE GASES. MOST HOMES REQUI RE
OUTSIDE AIR BE SUPPLIED TO THE FURNACE AREA.

Improved construction and additional insulation in buildings
have reduced heat loss by reducing air infiltration and es­cape around doors and windows. These changes have helped
in reducing heating/cooling costs but have created a prob­lem supplying combustion and ventilation air for gas fired
and other fuel burning appliances. Appliances that pull air
out of the house (clothes dryers, exhaust fans, fireplaces,
etc.) increase the problem by starving appliances for air.

When the furnace is installed as a direct vent (2-pipe) fur­nace, no special provisions for air for combustion are re­quired. However, if this furnace is to be installed in the same
space with other gas appliances, such as a water heater,
ensure there is an adequate supply of combustion and ven­tilation air for the other appliances. Refer to the latest edi­tion of the National Fuel Gas Code NFPA 54/ANSI Z223.1
(Section 9.3), or CAN/CGA B149 Installation Codes (Sec­tions 7.2, 7.3, or 7.4), or applicable provisions of the local
building codes for determining the combustion air require­ments for the appliances.

der cabinets.

humidistat, such as an outside wall.

WARNING

17

INST ALLATION CONSIDERA TIONS

Most homes will require outside air be supplied to the fur­nace area by means of ventilation grilles or ducts connect­ing directly to the outdoors or spaces open to the outdoors
such as attics or crawl spaces.

The following information on air for combustion and ventilation
is reproduced from the National Fuel Gas Code NFPA 54/ANSI

Z223.1 Section 9.3.

9.3* Air for Combustion and Ventilation.

9.3.1 General.

9.3.1.1 Air for combustion, ventilation, and dilution of flue gases for

appliances installed in buildings shall be obtained by application of one
of the methods covered in 9.3.2 through 9.3.6. Where the requirements
of 9.3.2 are not met, outdoor air shall be introduced in accordance with
methods covered in 9.3.3 through 9.3.6.

Exception No. 1: This provision shall not apply to direct vent appliances.

9.3.1.2 Appliances of other than natural draft design and other than
Category 1 vented appliances shall be provided with combustion, ven­tilation, and dilution air in accordance with the appliance manufacturer’s
instructions.

9.3.1.3 Appliances shall be located so as not to interfere with proper
circulation of combustion, ventilation, and dilution air.

9.3.1.4 Where used, a draft hood or a barometric draft regulator shall be
installed in the same room or enclosure as the appliance served so as to
prevent any difference in pressure between the hood or regulator and the
combustion air supply.

(2) For fan-assisted appliances, calculate using the following equation:

Required Volume

where:

I

other

I

fan

ACH = air change per hour (percent of volume of space exchanged

(3) For purposes of this calculation, an infiltration rate greater than

0.60 ACH shall not be used in the equations in 9.3.2.2(1) and

9.3.2.2(2).

9.3.2.3 Indoor Opening Size and Location. Openings used to connect
indoor spaces shall be sized and located in accordance with the follow­ing:

(1)*Combining spaces on the same story. Each opening shall have a

minimum free area of 1 in.
input rating of all appliances in the space but not less than 100 in.
(0.60m2). One opening shall commence within 12 in. (300 mm) of
the top, and one opening shall commence within 12 in. (300 mm) of
the bottom, of the enclosure [see Figure A.9.3.2.3(1)]. The mini-
mum dimension of air openings shall be not less than 3 in. (80 mm).

NOTE: Each opening must have
a free area of not less than one
square inch per 1000 BTU of
the total input rating of all equip­ment in the enclosure, but not
less than 100 square inches.

3

> ________ _________

fan

15 ft

ACH 1000 Btu/hr

I

fan

()

= all appliances other than fan-assisted input in Btu per

hour

= fan-assisted appliances input in Btu per hour

per hour, expressed as a decimal)

2

/1000Btu/hr (2200 mm2/kW) of the total

Chimney or Gas Vent

2

9.3.1.5 Makeup air requirements for the operation of exhaust fans, kitchen
ventilation systems, clothes dryers, and fireplaces shall be considered in
determining the adequacy of a space to provide combustion air require­ments.

9.3.2 Indoor Combustion Air . The required volume of indoor air shall
be determined in accordance with the method in 9.3.2.1 or 9.3.2.2 ex­cept that where the air infiltration rate is known to be less than 0.40
ACH, the method in 9.3.2.2 shall be used. The total required volume
shall be the sum of the required volume calculated for all appliances
located within the space. Rooms communicating directly with the space
in which the appliances are installed through openings not furnished
with doors, and through combustion air openings sized and located in
accordance with 9.3.2.3, are considered a part of the required volume.

9.3.2.1* Standard Method. The minimum required volume shall be 50
ft 3 per 1,000/Btu/hour (4.8m3/kW).

9.3.2.2* Known Air Infiltration Rate Method. Where the air infiltra­tion rate of a structure is known, the minimum required volume shall be
determined as follows:

(1) For appliances other than fan-assisted, calculate using the following

equation:
Required Volume

> ________ _________

other

3

21 ft

I

other

ACH 1000 Btu/hr

(

)

Opening

Water
Heater

Furnace

Opening

Figure A.9.2.3.3.(1) All Combustion Air from Adjacent

Indoor Spaces through Indoor Combustion Air Openings.

(2) Combining spaces in different stories. The volumes of spaces in

different stories shall be considered as communicating spaces where
such spaces are connected by one or more openings in doors or
floors having a total minimum free area of 2 in.2/1000 Btu/hr (4400
mm2/kW) of total input rating of all appliances.

9.3.3 Outdoor Combustion Air. Outdoor combustion air shall be pro­vided through opening(s) to the outdoors in accordance with the meth­ods in 9.3.3.1 or 9.3.3.2. The minimum dimension of air openings shall
not be less than 3 in. (80 mm).

9.3.3.1 Two Permanent Openings Method. Two permanent open­ings, one commencing within 12 in. (300 mm) of the top and one com­mencing within 12 in. (300 mm) of the bottom, of the enclosure shall be
provided. The openings shall communicate directly, or by ducts, with
the outdoors or spaces that freely communicate with the outdoors, as
follows:

18

INST ALLATION CONSIDERA TIONS

A

(1)*Where directly communicating with the outdoors or where commu-

nicating to the outdoors through vertical ducts, each opening shall
have a minimum free area of 1 in.
total input rating of all appliances in the enclosure. [See Figure

A.9.3.3.1(1)(a) and Figure A.9.3.3.1(1)(b).]

Chimney or Gas Vent

Water
Heater

Furnace

lternate

air inlet

Ventilation louvers for
unheated crawl space

Figure A.9.3.3.1(1)(a) All Combustion Air Fr om Outdoors -

Inlet Air from Ventilated Crawl Space and Outlet Air

to Ventilated Attic.

2

/4000 Btu/hr (550 min2/kW) of

Ventilation louvers
(each end of attic)

NOTE: The inlet and outlet a ir
openings must each have a free
area of not less than one square
inch per 4000 BTU of the
total input rating of all equipment
in the enclosure.

Outlet Air

Inlet Air

9.3.3.2* One Permanent Opening Method. One permanent open­ings, commencing within 12 in. (300 mm) of the top of the enclosure,
shall be provided. The appliance shall have clearances of at least 1 in. (25
mm) from the sides and back and 6 in. (150 mm) from the front of the
appliance. The opening shall directly communicate with the outdoors or
shall communicate through a vertical or horizontal duct to the outdoors
or spaces that freely communicate with the outdoors (see Figure
A.9.3.3.2) and shall have a minimum free area of the following:
(1) 1 in.

appliances located in the enclosure, and

(2) Not less than the sum of the areas of all vent connectors in the

space.

Chimney or Gas Vent

NOTE: The air duct openings
must have a free a r ea o f not
less than one square inch per
2000 BTU of the total input
rating of all equipment in the
enclosure*.

Furnace

Water
Heater

Outlet air duct

Inlet air duct

Figure A.9.3.3.1(2) All Combustion Air From Outdoors

through Horizontal Ducts.

2

/3000 Btu/hr (700 mm2 per kW) of the total input rating of all

Chimney or Gas Vent

Ventilation louvers
(each end of attic)

NOTE: The inlet and outlet air
openings must each have a free
area of not less than one square
inch per 4000 BTU of the
total input rating of all equipmen t
in the enclosure.

Outlet Air

Water
Heater

Furnace

Inlet air duct
[ends 1 ft (300 mm)
above floor]

Figure A.9.3.3.1(1)(b) All Combustion Air

From Outdoors through Ventilated Attic.

(2)*Where communicating with the outdoors through horizontal ducts,

each opening shall have a minimum free area of 1 in.2/2000 Btu/hr
(1100 min2/kW) of total input rating of all appliances in the enclo­sure. [See Figure A.9.3.3.1(2).]

NOTE: The single opening must have
a free area of not less than one
square inch per 30 00 BT U o f
the total in p ut rat i ng of all equip­ment in th e enclosure, but not less than
the sum of the areas of all vent
connecto rs in the confined space.

Chimney or Gas Vent

Water
Heater

Furnace

Opening

Alternate
Opening
Location

Figure A.9.3.3.2 All Combustion Air

From Outdoors through Single Combustion Air Opening.

9.3.4 Combination Indoor and Outdoor Combustion Air. The use of

a combination of indoor and outdoor combustion air shall be in accor­dance with (1) through (3) (see example calculation in Annex J]:

(1) Indoor Openings: Where used, openings connecting the interior

spaces shall comply with 9.3.2.3.

(2) Outdoor Opening(s) Location. Outdoor opening(s) shall be located

in accordance with 9.3.3.

(3) Outdoor Opening(s) Size. The outdoor opening(s) size shall be

calculated in accordance with the following:

(a) The ratio of the interior spaces shall be the available volume of

all communicating spaces divided by the required volume.

(b) The outdoor size reduction factor shall be 1 minus the ratio of

interior spaces.

19

INST ALLATION CONSIDERA TIONS

(c) The minimum size of outdoor opening(s) shall be the full size

of outdoor opening(s) calculated in accordance with 9.3.3,
multiplied by the reduction factor. The minimum dimension
of air openings shall not be less than 3 in. (80 mm).

9.3.8.4 Ducts shall not serve both upper and lower combustion air
openings where both such openings are used. The separation between
ducts servicing upper and lower combustion air openings shall be main­tained to the source of combustion air.

9.3.5 Engineered Installations. Engineered combustion air installa­tions shall provide an adequate supply of combustion, ventilation, and
dilution air and shall be approved by the authority having jurisdiction.

9.3.6 Mechanical Combustion Air Supply. Where all combustion air
is provided by a mechanical air supply system, the combustion air shall
be supplied form outdoors at the minimum rate of 0.35 ft3/min per 1000
Btu/hr (0.034 m
space.

9.3.6.1 Where exhaust fans are installed, additional air shall be provided
to replace the exhausted air.

9.3.6.2 Each of the appliances served shall be interlocked to the me­chanical air supply system to prevent main burner operation where the
mechanical air supply system is not in operation.

9.3.6.3 Where combustion air is provided by the building’ s mechanical
ventilation system, the system shall provide the specified combustion
air rate in addition to the required ventilation air.

9.3.7 Louvers, Grilles, and Screens.

9.3.7.1 Louvers and Grilles. The required size of openings for com-

bustion, ventilation, and dilution air shall be based on the net free area of
each opening. Where the free area through a design of louver or grille or
screen is known, it shall be used in calculating the size opening required
to provide the free area specified. Where the louver and grille design and
free area are not known, it shall be assumed that wood louvers will have
25 percent free area, and metal louvers and grilles will have 75 percent
free area. Nonmotorized louvers and grilles shall be fixed in the open
position.

3

/min per kW) for all appliances located within the

9.3.8.5 Ducts shall not be screened where terminating in an attic space.

9.3.8.6 Horizontal upper combustion air ducts shall not slope down-

ward toward the source of combustion air.

9.3.8.7 The remaining space surrounding a chimney liner, gas vent, spe­cial gas vent, or plastic piping installed within a masonry, metal, or
factory built chimney shall not be used to supply combustion air.

Exception: Direct vent appliances designed for installation in a solid
fuel-burning fireplace where installed in accordance with the
manufacture’s installation instructions.

9.3.8.8 Combustion air intake openings located on the exterior of the
building shall have the lowest side of the combustion air intake openings
located at least 12 in. (300 mm) vertically from the adjoining grade level.

Horizontal Applications and Considerations

Horizontal applications, in particular, may dictate many of
the installation’s specifics such as airflow direction, duct­work connections, flue and/or combustion air pipe connec­tions, etc. The basic application of this furnace as a hori­zontal furnace differs only slightly from an upright installa­tion. When installing a furnace horizontally, additional con­sideration must be given to the following:

9.3.7.2 Minimum Scree Mesh Size. Screens shall not be smaller than
1/4 in. mesh.

9.3.7.3 Motorized Louvers. Motorized louvers shall be interlocked
with the appliance so they are proven in the full open position prior to
main burner ignition and during main burner operation. Means shall be
provided to prevent the main burner form igniting should the louver fail
to open during burner startup and to shut down the main burner if the
louvers close during burner operation.

9.3.8 Combustion Air Ducts. Combustion air ducts shall comply with

9.3.8.1 through 9.3.8.8.

9.3.8.1 Ducts shall be constructed of galvanized steel or a material hav­ing equivalent corrosion resistance, strength, and rigidity.

Exception: Within dwellings units, unobstructed stud and joist spaces
shall not be prohibited from conveying combustion air, provided that not
more than one fireblock is removed.

9.3.8.2 Ducts shall terminate in an unobstructed space, allowing free
movement of combustion air to the appliances.

9.3.8.3 Ducts shall serve a single space.

90% Horizontal Furnace Shown

20

INST ALLATION CONSIDERA TIONS

Installation Positions

*MVC96 models may be installed up flow or horizontally
with left or right side down. *CVC96 models may be installed
down flow or horizontally with left or right side down. Do not
install any furnace on its back.

Horizontal Installations

1. Horizontal installations require 5.5" under the furnace
to accommodate the drain trap.

2. Horizontal furnaces must be installed with ¾” slope from
back to front to permit condensate flow towards the
front of the furnace.

When installing a *MVM97 horizontally with the left side
down, there are two options for connecting the vent pipe to
the furnace.

1. Venting may be connected to the furnace vent pipe fit­ting on the original top (now the end) of the furnace

2. The internal vent pipe and elbow may be removed from
the furnace to permit the vent to exit the top (original
side) of the furnace. If this option is used, an RF000142
Vent-Drain coupling must be used to keep condensate
from collecting in the inducer assembly.

Refer to the following instructions and illustration.

1. Remove screws from vent flange.

2. Remove internal elbow and vent pipe.

3. Cut pipe 2 1/2” from flange.

4. Remove cabinet plug adjacent to inducer outlet and in­stall an original cabinet vent hole.

5. Install RF000142 coupling on inducer outlet.

6. Install flanged vent section removed in step 2 & secure
with clamps.

7. Secure flange to cabinet using screws removed in step

1.

E
R
E

H
T

U
C

Vent/Flue Pipe Cuts

R 000142F

Insert flange. Cut 2 ½” long.

90% Furnace Recommended Installation Positions

NOTE: Alternate "vertical" piping connections can not be
used when an upflow 90% furnace is installed with supply
air discharging to the right or when a counterflow furnace is
installed with supply discharging to the left. In this case,
use the standard flue and combustion air piping connec­tions

21

INST ALLATION CONSIDERA TIONS

Alternate Electrical and Gas Line Connections

The furnaces have provisions allowing for electrical and gas
line connections through either side panel. In horizontal ap­plications the connections can be made either through the
“top” or “bottom” of the furnace.

Drain Pan

A drain pan must be provided if the furnace is installed above
a conditioned area. The drain pan must cover the entire area
under the furnace (and air conditioning coil if applicable).

Freeze Protection

If the drain trap and drain line will be exposed to tempera­tures near or below freezing, adequate measures must be
taken to prevent condensate from freezing. NOTE: The use
of insulation and/or heat tape is recommended. Failure to
provide proper condensate drainage can result in property
damage.

Propane Gas and/or High Altitude Installations

WARNING

P

OSSIBLE PRO PERTY DA MAGE, PERSO NAL IN JURY OR DEATH MAY OCCUR IF
THE CORRECT CONV ERSI ON KITS ARE NOT IN STALLE D.
MUST BE APPLIE D TO I NSURE SAFE AN D PROPER FURNAC E OPERAT ION.
CONVERSIONS MUS T BE PERFORMED BY A QUALIF IE D INSTA LLER OR SERV ICE
AGENCY.

THE APPROPRIATE KI TS

ALL

WARNING

UPON COMPLETION OF THE FURNA CE INSTALLATIO N, CAREFULLY I NSPECT THE

ENTIRE FLUE SYSTEM BO TH INSIDE AND OUTSIDE THE FURNACE TO ASS URE IT
IS PROPERLY SEALED.
PERSONAL INJURY OR DE ATH DUE TO EXPOS URE TO FLUE PRODUCTS,
INCLUDING CARBON MONOXIDE.

LEAKS IN THE FLUE SYSTEM CAN RESULT IN SERIOUS

A condensing gas furnace achieves its high level of efficiency
by extracting almost all of the heat from the products of
combustion and cooling them to the point where condensa­tion takes place. Because of the relatively low flue gas tem­perature and water condensation requirements, PVC pipe is
used as venting material.

This furnace must not be connected to Type B, BW, or L
vent or vent connector, and must not be vented into any
portion of a factory built or masonry chimney except when
used as a pathway for PVC as described later in this sec­tion. Never common vent this appliance with another appli­ance or use a vent which is used by a solid fuel appliance.

It is the responsibility of the installer to follow the manufac­turers’ recommendations and to verify that all vent/flue pip­ing and connectors are compatible with furnace flue prod­ucts. Additionally, it is the responsibility of the installer to
ensure that all piping and connections possess adequate
structural integrity and support to prevent flue pipe separa­tion, shifting, or sagging during furnace operation.

This furnace is shipped from the factory configured for natu­ral gas at standard altitude. Propane gas installations re­quire an orifice change to compensate for the energy con­tent difference between natural and propane gas.

High altitude installations may require both a pressure switch
and an orifice change. These changes are necessary to com­pensate for the natural reduction in the density of both the
gas fuel and the combustion air at higher altitude.

Refer to the Accessories Charts in this manual or product
Specification Sheet for a tabular listing of appropriate
manufacturer’s kits for propane gas and/or high altitude in­stallations. The indicated kits must be used to insure safe
and proper furnace operation. All conversions must be per­formed by a qualified installer, or service agency.

VENT/FLUE PIPE AND COMBUSTION AIR PIPE

WARNING

F

AILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN BODILY INJURY OR

DEATH.

CAREFULLY READ AND FOLLOW ALL INSTRUCTIONS GIVEN IN THIS

SECTION.

Materials and Joining Methods

WARNING

T

O AVOID BODILY INJURY, FIRE OR EXPLOSION, SOLVENT CEMENTS MUST BE
KEPT AWAY FROM ALL IGNITION SOURCES (I.E., SPARKS, OPEN FLAMES, AND
EXCESSIVE HEAT) AS THEY ARE COMBUSTIBLE LIQUIDS.
CEMENT VAPORS OR CONTACT WITH SKIN AND/ OR EYES.

A

VOID BREATHING

Precautions should be taken to prevent condensate from
freezing inside the vent/flue pipe and/or at the vent/flue pipe
termination. It is our recommendation that all vent/flue piping
exposed to temperatures below 35°F for extended periods
of time should be insulated with 1/2” thick closed cell foam.
Also all vent/flue piping exposed outdoors in excess of the
terminations shown in this manual (or in unheated areas)
should be insulated with 1/2” thick closed cell foam. Inspect
piping for leaks prior to installing insulation.

The following bullets and diagram describe the restrictions
concerning the appropriate location of vent/flue pipe and com­bustion air intake pipe (when applicable) terminations. Re­fer to the installation instructions for specific details on ter­mination construction.

• All terminations must be located at least 12 inches
above ground level or the anticipated snow level.

• Vent terminations must terminate at least 3 feet above
any forced air inlet located within 10 feet.

22

INST ALLATION CONSIDERA TIONS

NOTE: This provision does not apply to the combus-

tion air intake termination of a direct vent application.

• The vent termination of a non-direct vent application
must terminate at least 4 feet below, 4 feet horizon­tally from, or 1 foot above any door, window, or gravity
air inlet into any building.

• The vent termination of a direct vent application must
terminate at least 12 inches from any opening through
which flue gases may enter a building (door, window,
or gravity air inlet).

• The vent termination of vent pipe run vertically through
a roof must terminate at least 12 inches above the
roof line (or the anticipated snow level) and be at least
12 inches from any vertical wall (including any antici­pated snow build up).

• A vent termination shall not terminate over public walk­ways or over an area where condensate or vapor could
create a nuisance or hazard or could be detrimental
to the operation of regulators, relief valves, or other
equipment.

• The combustion air intake termination of a direct vent
application should not terminate in an area which is
frequently dusty or dirty.

NOTE: In Canada, CAN B149.1 Fuel Gas Code takes pre­cedence over the preceding termination restrictions.

OTHER THAN

COMBUSTION AIR

TERMINATION INTAKE

NON-DIRECT VENT

VENT/FLUE TERMINATION

NO TERMINATIONS
ABOVE WALKWAY

3"

GRADE OR HIGHEST

ANTICIPATED

SNOW LEVEL

FORCED AIR

INLET

10'

12"

12"

DIRECT VENT

VENT/FLUE TERMINATION

12"

VENT/FLUE TERMINATION

4'

4'
12"

NON-DIRECT VENT

90% Furnace Vent Termination Clearances

Direct Vent Installations

On upflow units secure the combustion air intake pipe di­rectly to the air intake coupling. On counterflow units se­cure the combustion air intake pipe to the air intake cou­pling using the rubber coupling and worm gear hose clamps
provided with the unit. The counterflow rubber coupling al­lows service removal of air intake piping internal to the fur­nace blower compartment. The combustion air intake pipe
can also be secured directly to the counterflow unit air in­take pipe coupling.

Non-Direct Vent Installations

A minimum of one 90° elbow must be installed on the com­bustion air intake “coupling” to guard against inadvertent
blockage.

HE RUBBER ELBOW IS NOT DESIGNED TO SUPPORAT A LOAD. WHEN THE

T

RUBBER ELBOW IS MOUNTED EXTERNALLY TO THE FURNACE CABINET,
EXTREME CARE MUST BE TAKEN TO ADEQUATELY SUPPORT FIELD-SUPPLI ED
VENT/FLUE PIPING, AS DAMAGE CAN RESULT IN LEAKS CAUSING BODILY
INJURY OR DEATH DUE TO EXPOSURE TO FLUE GASES, INCLUDING CARBON
MONOXIDE.

Vent/Flue Pipe Lengths (Non-Direct Vent) and Diam­eters

Refer to the following table for applicable length, elbows,
and pipe diameter for construction of the vent/flue pipe sys­tem of a non-direct vent installation. In addition to the vent/
flue pipe, a single 90° elbow must be secured to the com­bustion air intake to prevent inadvertent blockage. The tee
or elbows used in the vent/flue termination must be included
when determining the number of elbows in the piping sys­tem.

Vent/Flue and Combustion Air Pipe Lengths and Diam­eters

Refer to the following table for applicable length, elbows,
and pipe diameter for construction of the vent/flue and com­bustion air intake pipe systems of a non-direct vent (single
pipe) installation. The number of elbows tabulated repre­sents the number of elbows and/or tees in each (Vent/Flue
& Combustion Air Intake) pipe. Elbows and/or tees used in
the terminations must be included when determining the num­ber of elbows in the piping systems.

If the combustion air intake pipe is to be installed above a
finished ceiling or other area where dripping of condensate
will be objectionable, insulation of the combustion air pipe
may be required. Use 1/2” thick closed cell foam insulation
such as Armaflex or Insultube where required.

Vent/Flue Pipe Terminations

The vent/flue pipe may terminate vertically, as through a roof,
or horizontally, as through an outside wall.

Vertical vent/flue pipe termination should be as shown in the
following figures. Refer to Vent/Flue Pipe and Combustion
Air Pipe - Termination Locations section in this manual or
the installation instructions for details concerning location
restrictions. The penetration of the vent through the roof must
be sealed tight with proper flashing such as is used with a
plastic plumbing vent.

WARNING

23

INST ALLATION CONSIDERA TIONS

Horizontal vent/flue pipe terminations should be as shown in
the following figure. Refer to Vent/Flue Pipe and Combus-
tion Air Pipe - Termination Locations section in this manual
or the installation instructions for details concerning loca­tion restrictions. A 2 3/8" diameter wall penetration is re­quired for 2" diameter pipe while a 3 1/2" diameter hole is
required for 3" diameter pipe. To secure the pipe passing
through the wall and prohibit damage to piping connections,
a coupling should be installed on either side of the wall and
solvent cemented to a length of pipe connecting the two
couplings. The length of pipe should be the wall thickness
plus the depth of the socket fittings to be installed on the
inside and outside of the wall. The wall penetration should
be sealed with silicone caulking material.

In a basement installation, the vent/flue pipe can be run be­tween joist spaces. If the vent pipe must go below a joist
and then up into the last joist space to penetrate the header,
two 45° elbows should be used to reach the header rather
than two 90° elbows.

NOTE: Terminate both pipes in the same pressure zone
(same side of roof, no major obstacle between pipes, etc).

TEE (OPTIONAL)

COMBUSTION AIR INTAKE

(OPTIONAL)

*Not required for

single pipe installation

E

N

I

L

F

O

O

R

INTAKE

SCREEN

OPTIONAL

12” MIN TO ROOF OR HIGHEST
ANTICIPATED SNOW LEVEL

6

9

12” MIN
HEIGHT DIFFERENCE
BETWEEN
INT AKE AND VENT

”

3

-

.

X

A

M

”

.

N

I

M

90% Furnace Horizontal Termination (Single Pipe)

Direct Vent (Dual Pipe) Piping

Direct vent installations require both a combustion air in­take and a vent/flue pipe. The pipes may be run horizontally
and exit through the side of the building or run vertically and
exit through the roof of the building. The pipes may be run
through an existing unused chimney; however, they must
extend a minimum of 12 inches above the top of the chim­ney. The space between the pipes and the chimney must
be closed with a weather tight, corrosion resistant flashing.
Both the combustion air intake and a vent/flue pipe termina­tions must be in the same atmospheric pressure zone. Re­fer to Vent/Flue and Combustion Air Pipe - Termination Lo-
cations or Concentric Vent Termination section in this manual
or the installation instructions for specific details on termi­nation construction.

*MVC9 6/*CVC 9 6 Direct Vent (2 - Pipe) and N on-Direct Vent (1- Pip e)

Unit Input

(Btu)

12" MINIMUM

VENT/FLUE TEE

90° ELBOW TURNED

12" MINIMUM ABOVE

HIGHEST ANTICIPATED

SNOW LEVEL

OR

DOWN

Above Highest Anticipated Snow Level

Maximum Allowable Length of Vent/Flue Pipe

& Comb u stion Air Pipe (ft )

Pipe Size

(4)

(in .)

12345678

Number of Elbows

(1) (2)

(3) (5)

(6)

ELBOWS

STRAIGHT

24

40,000

60,000

80,000 "B" 2 or 2 1/2 75 70 65 60 55 50 45 40
80,000 "B" 3 200 193 186 179 172 165 158 151

80,000 "C" 2 or 2 1/2 25 20 15 10 5 N/A N /A N/A
80,000 "C" 3 200 193 186 179 172 165 158 151

100,000 2 or 2 1/2 25 20 15 10 5 N/A N /A N /A
100,000 3 200 193 186 179 172 165 158 151
120,000 2 or 2 1/2 45 40 35 30 25 20 15 10
120,000 3 95 90 85 80 75 70 65 60

2

or 2 1/2

2

or 2 1/2

120 115 110 105 100 95 90 85

95 90 85 80 75 70 65 60