Goodman GMVC950704CXAA, GCVC90704CXAA, GMVC950905DXAA, GMVC951155DXAA, GCVC90905DXAA Technical Manual

TECHNICAL MANUTECHNICAL MANU

TECHNICAL MANU

TECHNICAL MANUTECHNICAL MANU

TM

ALAL

AL

ALAL

ACVC9/AMVC95

GCVC9/GMVC95

90%-95% Gas Furnace Unit s

• Refer to Service Manual RS6200004 for installation, operation, and troubleshooting information.

• All safety information must be followed as provided in the Service Manual.

• Refer to the appropriate Parts Catalog for part number information.

• Models listed on page 3.

®

C

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 performed by an unqualified person.

US

RT6612021

October 2009

Copyright ©2009 Goodman Manufacturing Company, L.P.

PRODUCT IDENTIFICATION

A

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.

GCVC90704CXAA

PRODUCT
TYPE:

G: Good man®

: Ama na ®

Brand Gas

SUPPL Y TYPE:

C: Counterflow/
Hor izontal
M: Up fl ow /
Hor izontal

FURNACE TYPE:

V: Variable Speed

AFUE

9: 90 %
95: 95%

COMMUNICATION
FEATURE:

C: 4-wire
Communication
Ready

AIRFLOW
CAPABILITY:

3: 1200
4: 1600
5: 2000

NOMINAL INPUT:

0 45: 45,000 Btuh
0 70: 70,000 Btuh
0 90: 90,000 Btuh
1 15: 115,000 Btuh

CABINET
WIDTH:

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

ADDITIONAL
FEATURES:

N: Natural Gas

X: Low NOx

A: Initial Release

MAJOR

REVISION

LEVEL

MINOR

REVISION

LEVEL

A: Init ial Re lease

WARNING

WARNING

WARNING

WARNING

arising from improper service or service procedures. If
you install or perform service on this unit, you assume
responsibility for any personal injury or property damage
which may result. Many jurisdictions require a license to
install or service heating and air conditioning equipment.

Disconnect ALL power before servicing or installing this unit. Multiple power
sources may be present. Failure to do so may cause property damage, personal
injury or death.

Goodman will not be responsible
for any injury or property damage

2

HIGH VOLTAGE!

WARNING

WARNING

individuals meeting the requirements of an "entry level
technician" as specified by the Air-Conditioning, Heating,
and Refrigeration Institute (AHRI). Attempting to install
or repair this unit without such background may result
in product damage, personal injury or death.

Installation and repair of this unit
should be performed

ONLY by

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.

GMVC950453BXAA
GMVC950704CXAA
GMVC950905DXAA

GMVC951155DXAA

GCVC90704CXAA
GCVC90905DXAA
GCVC91155DXAA

AMVC950453BXAA
AMVC950704CXAA
AMVC950905DXAA

AMVC951155DXAA

ACVC90704CXAA
ACVC90905DXAA

WARNING

WARNING

WARNING

WARNING

Serious property damage, personal injury, reduced unit
performance and/or hazardous conditions may result
from the use of such non-approved devices.

The United States Environmental Protection Agency (“EPA”) has issued various regulations re­garding the introduction and disposal of refrigerants introduced into this unit. Failure to follow
these regulations may harm the environment and can lead to the imposition of substantial fines.
These regulations may vary by jurisdiction. Should questions arise, contact your local EPA office.

Do not connect or use any device
that is not design certified by
Goodman for use with this unit.

WARNING

WARNING

do not store combustible materials or use gasoline or
other flammable liquids or vapors in the vicinity of this
appliance.

To prevent the risk of property
damage, personal injury, or death,

3

PRODUCT DESIGN

A

General Operation

Models covered by this manual come with a new 4-wire com­municating PCB. When paired with a compatible communi­cating indoor unit and a CTK01AA communicating thermo­stat, these models can support 4-wire communication pro­tocol and provide more troubleshooting information. These
models are also backward compatible with the legacy ther­mostat wiring.

The GCVC9, GMVC95, AMVC95 and ACVC9 furnaces are
equipped with an electronic ignition device to light the burn­ers and an induced draft blower to exhaust combustion prod­ucts.

An interlock switch prevents furnace operation if the blower
door is not in place. Keep the blower access doors in place
except for inspection and maintenance.

These furnaces are also equipped with a self-diagnosing elec­tronic control module. In the event a furnace component is
not operating properly, the control module's dual 7-segment
LED's will display an alpha-numeric code, depending upon
the problem encountered. These LED's may be viewed
through the observation window in the blower access door.
Refer to the Troubleshooting Chart for further explanation of
the LED codes and Abnormal Operation - Integrated Igni-
tion Control section in the Service Instructions for an expla­nation of the possible problem.

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.

*Obtain from: American National Standards Institute 1430
Broadway New York, NY 10018

Location Considerations

• The furnace should be as centralized as is practical
with respect to the air distribution system.

• Do not install the furnace directly on carpeting, tile, or
combustible material other than wood flooring.

• When suspending the furnace from rafters or joists,
use 3/8" threaded rod and 2” x 2” x 1/8” angle as
shown in the Installation and Service Instructions. The
length of the rod will depend on the application and
clearance necessary.

• When installed in a residential garage, the furnace
must be positioned so the burners and ignition source
are located not less than 18 inches (457 mm) above
the floor and protected from physical damage by ve­hicles.

Notes:

1. Installer must supply one or two PVC pipes: one for com­bustion air (optional) and one for the flue outlet (required).

Vent pipe must be either 2” or 3” in diameter, depending
upon furnace input, number of elbows, length of run and
installation (1 or 2 pipes). The optional Combustion Air
Pipe is dependent on installation/code requirements and
must be 2” or 3” diameter PVC.

2. Line voltage wiring can enter through the right or left side
of the furnace. Low voltage wiring can enter through the
right or left side of furnace.

3. Conversion kits for propane gas and high altitude natural
and propane gas operation are available. See High Alti­tude Derate chart for details.

4. Installer must supply the following gas line fittings, de­pending on which entrance is used:

Left -- Two 90° Elbows, one close nipple, straight pipe
Right -- Straight pipe to reach gas valve.

Accessibility Clearances (Minimum)

*MVC95* MINI MUM CLEARANCES TO CO MBUSTIBLE MA TERIALS

(INCHES)

POSITION* FRONT SIDES REAR TOP FLUE FLOOR

Upflow30010C

Horizontal Alcove 6 0 4 0 C

*= All positioning is determined as installed unit is vi ew ed from the f r ont.
C= If pl aced on combustibl e floor, floor MU ST be wo od only.
NC= For in sta lalt i on on non-c om busti bl e floors only. A combustible

subb ase must be used for instal la tions on combustible flooring.

*CVC9 MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS

(INCHES)

POSITION* FRONT SIDES REAR TOP FLUE FLOOR

Upflow10010NC

Horizontal Alcove 6 0 4 0 C

*= All positioning is determined as installed unit is vi ew ed from the f r ont.
C= If pl aced on combustibl e floor, floor MU ST be wo od only.
NC= For in sta lalt i on on non-c om busti bl e floors only. A combustible

subb ase must be used for instal la tions on combustible flooring.

Alcove Illustration

REAR

S
I

E
D

I
S

LCOVE

D
E

24" at front is required for servicing or cleaning.
Note: In all cases accessibility clearance shall take

precedence over clearances from the enclosure where
accessibility clearances are greater. All dimensions are
given in inches.

4

PRODUCT DESIGN

High Altitude Derate

When this furnace is installed at high altitude, the appropri­ate High Altitude orifice kit must be installed. This is re­quired due to the natural reduction in the density of both the
gas fuel and combustion air as altitude increases. The kit
will provide the proper design certified input rate within the
specified altitude range.

High altitude kits are purchased according to the installa­tion altitude and usage of either natural or propane gas. Refer
to the chart above for a tabular listing of appropriate altitude
ranges and corresponding manufacturer’s high altitude Natu­ral Gas and Propane Gas kits. For a tabular listing of appro­priate altitude ranges and corresponding manufacturer's High
Altitude Pressure Switch kits, refer to either the Pressure

Switch Trip Points & Usage Chart in this manual or the Ac­cessory Charts in Service Instructions.

Single Stage Thermostat

A single-stage thermostat with only one heating stage may
be used to control this furnace. The application of a single­stage thermostat does not offer “true” thermostat-driven two­stage 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 the following figure.

Heat OFF Delay
DIP Switches

ON OFF

3
4

Thermostat

Stage Delay

S1

Move to the ON position
to select two-stage
thermostat or OFF to
select single stage
thermostat

Move to the ON position
to select A u to transition
delay or OFF for 5 minute
transition delay

Furnace

GMVC950453BX*
GMVC950704CX*

AMVC950453BX*

AMVC950704CX*

GMVC950905DX*
GMVC951155DX*
AMVC950905DX*
AMVC951155DX*

GCVC90704CX*
GCVC90905DX*
GCVC91155DX*
ACVC90704CX*
ACVC90905DX*

0 - 7,000 Feet

(Standard Altitude)

Gas Orifices

Natural

No

Change

No

Change

No

Change

LPM-05*

#55

Orifice

LPM-05*

#55

Orifice

LPM-05*

#55

Orifice

Propane

"STANDARD" and "HIGH ALTITUDE" KITS

7, 001 - 9,000 Feet

Gas Or ifices

ID Blwr

Pressure

Switch

No

Change

No

Change

No

Change

Natural

HANG13

#44

Orifice

HANG13

#44

Orifice

HANG13

#44

Orifice

HALP11

#56

Orifice

HALP11

#56

Orifice

HALP11

#56

Orifice

ID Blwr

Pressure

Sw itch

Propane

HAPS28

HAPS29

HAPS29

9, 001 - 11,000 Feet

Gas Or ifices

Natural

HANG14

#45

Orifice

HANG14

#45

Orifice

HANG14

#45

Orifice

HALP11

#56

Orifice

HALP11

#56

Orifice

HALP11

#56

Orifice

ID Blwr

Pressure

Switch

Propane

HAPS28

HAPS29

HAPS31

5

COMPONENT IDENTIFICATION

6

5

8

7

9

7

10

5

27

26

32

3

19

4

*

*

*

2

1

*

*

*

*

*

*

31

18

15

16

3

12
13

19

11

17

18

14

20

17

25

24

3

31

20

21

18

19

28

BLOWER COMPARTMENT BURNER COMPARTMENT

23

26

27

25

20

13

12

9

7

23

10

11

28

3

29

15

14

BLOWER COMPARTMENT

16

30

18

19

20

2

21

6

8

7

4

1

1 Two-Stage Gas Valve
2 Gas Line Entrance (Alternate)
3 Pressure Switch(es)
4 Gas Manifold
5 Combustion Air Intake Connection
6 Hot Surface Igniter
7 Rollout Limit
8 Burners

9 Flame Sensor
10 Flue Pipe Connection
11 Flue Pipe
12 Primary Limit
13 Gas Line Entrance
14 Flue Pipe Connection (Alternate)
15 Rubber Elbow
16 Two-Speed Induced Draft Blower
17 Electrical Connection Inlets (Alternate)

Counterflow /HorizontalUpflow/Horizontal

18 Coil Front Cover Pressure Tap
19 Coil Front Cover Drain Port
20 Drain Line Penetrations
21 Drain Trap
22 Blower Door Interlock Switch
23 Inductor (Not All Models)
24 Two-Stage Integrated Control Module

(with fuse and diagnostic LED)
25 24 Volt Thermostat Connections
26 Transformer (40 VA)
27 ECM Variable Speed Circulator Blower
28 Auxiliary Limit
29 Junction Box
30 Electrical Connection Inlets
31 Coil Front Cover
32 Combustion Air Inlet Pipe (ACV9 only)

6

PRODUCT DIMENSIONS

SIZE

UNITSABCD

SMA LL 0453BX* 17 1/2 15 1 2 3/8 1 2 5/8

MEDI UM 07 04CX* 21 1 9 16 3/8 1 4 5/8

LARGE

0905DX*

1155DX*

24 1/2 23 2 0 3/8 1 8 5/8

All dimensions are in inches.

GMVC95/AMVC95___X*

IR

DISCHARGE

STANDARD GAS

SUPPLY HOLE

2 11 /1 6

2" PVC

VENT/FLUE PIPE

(RIGHT OR

w/ 3/4" PVC

DISCHARGE

DRAIN TRAP

CONDENSATE

B

C

A

(DISCHARGE AIR)

4 1/8

LEFT SIDE)

RIGHT SIDE

HOLES

DRAIN LINE

LOW VOLTA GE

ELECTRICAL HOLE

TRAP

DRAIN

19 3/16

SIDE CUT-OUT

HIGH VOLTAGE

ELECTRICAL HOLE

1 3/4

32 13/16

2

VIEW

RIGHT SIDE

BOTTOM KNOCK-OUT

PIPE

2" PVC

AIR INTAKE

AIR

DISCHARGE

20 3/16

CABINET

30 1/4

19 3/16

TRAP

DRAIN

2 5/8

HOLES

LEFT SIDE

DRAIN LINE

LOW VOLTAGE

ELECTRICAL HOLE

11 3/4

1 3/4

VIEW

LEFT S I D E

23 9/16

HIGH VOLTAGE

SIDE CUT-OUT

ELECTRICAL HOLE

BOTTOM KNOCK-OUT

1 1/2

1 5/8

NOTE: Airflow area will be reduced by approximately 18% if duct flanges are not unfolded. This could cause performance issues and noise issues.

7

PRODUCT DIMENSIONS

GCVC9/ACVC9_____X*

VENT/FLUE PIPE

2" PVC

HOLES

DRAIN LINE

RIGHT SIDE

LTERNATE GAS

SUPPLY HOLE

TRAP

DRAIN

HIGH VOLTAGE

ELECTRICAL HOLE

LOW VOLTAGE

ELECTRICAL HOLE

7 3/8

1 3/4

(RIGHT OR

LEFT SIDE)

w/ 3/4" PVC

DISCHARGE

DRAIN TRAP

CONDENSATE

2 11/16

14

18 13/16

28 5/16

2

IR

DISCHARGE

C

B

A

(RETURN AIR)

E

All dim ens ions are in inc hes .

DISCHARGE AIR

FOLDED FLANGES

UNFOLDE D FLANGES

24 1/2 23 20 3/ 8 18 5/ 8 20 7/ 8

AIR INTAKE

PIPE

2" PVC

28 5/1 6

15 1/2

1 3/4

TRAP

DRAIN

LOW VOLTAGE

ELECTRICAL HOLE

HIGH VOLTAGE

ELECTRICAL HOLE

11 1/2

9 13/ 16

2 5/8

18 5/8

HOLES

LEFT SIDE

DRAIN LINE

SUPPLY HOLE

STANDARD GAS

UNFOLDED FLANGES

AIR

20 5/3 2

DISCHARGE

FOLDED FLANGES

UNITSABCDE

SIZE

CABINET

0905DX*

1155DX*

LARGE

ME DIUM 0704CX* 21 19 16 3/8 14 5/8 17 1/ 2

8

NOTE: Airflow area will be reduced by approximately 18% if duct flanges are not unfolded. This could cause performance issues and noise issues.

PRODUCT DESIGN

PRESSURE SW ITCH TRIP POINTS AND USAGE CHART

MODEL

GMVC950453BX*
GMVC950704CX*
AMVC950453BX*
AMVC950704CX*

GMVC950905DX*
GMVC951155DX*
AMVC950905DX*
AMVC951155DX*

GCVC90704CX*
ACVC90704CX*

GCVC90905DX*
ACVC90905DX*

GCVC91155DX*

NEGATIVE PR ESSURE

ID BLOW ER

WITH FLUE

NOT FIRING

TYPICAL SEA LEVEL

(1)

DATA

NEGATIVE PR ESSURE

ID BLOWER

WITH FLUE

FIRING

TYPIC AL SEA LEVEL

(2)

DATA

NEGATIVE PRESSURE

COIL COVER

WITH FLUE

NOT FIRING

TYPICAL SEA LEVEL

(1)

DATA

NEGATIVE PR ESSURE

COIL COVER

WITH FLUE

FIRING

TYPICAL SEA LEVEL

(2)

DATA

LOW FIRE HIGH FIRE LOW FIRE HIGH FIRE LOW FIRE HIGH FIRE LOW FIRE HIGH FIRE

-0.45 -0.92 -0.50 -0.97 -0.25 -0.25 -0.25 -0.25

-0.65 -1.27 -0.70 -1.32 -0.25 -0.25 -0.25 -0.25

-0.35 -0.70 -0.40 -0.75 -0.52 -0.52 -0.52 -0.52

-0.35 -0.70 -0.40 -0.75 -0.52 -0.52 -0.52 -0.52

-0.35 -0.70 -0.40 -0.75 -0.52 -0.52 -0.52 -0.52

(1) Data given is least negative pres sure re quired for pressure sw itch to c lose.
(2) Data given is least negative pres sure re quired for pressure sw itch to remain closed.
Note: The typical sea level negative pres sure data represents the minimum pressures expected. Shorter length of flue pipe or single pipe systems

compared to dual pipe systems should show higher (greater negative) pr essures.

PRES S URE S WIT CH T RIP P O I NTS AN D US AGE CHART

0 to 7,000 ft.

TRIP POINT

MODEL

GMVC950453BX*
GMVC950704CX*
AMVC950453BX*
AMVC950704CX*

GMVC950905DX*
GMVC951155DX*
AMVC950905DX*
AMVC951155DX*

GCVC90704CX*
ACVC90704CX*

GCVC90905DX*
ACVC90905DX*

GCVC91155DX* -0.37 -0.37 20197313 -0.20 -0.55 11177118 -0.37 -0.37 -0.15 -0.30 HAPS31

Note: All installations above 7,000 ft. require a pressure switch change. For installations in Canada the *CVC9 & *MVC95 furnaces are certified only to 4500 ft.
Note: Replacement pressure switch number is list ed below high altitude kit number.
Note: All negative pressure rea dings are in inches of water column (" w.c.).

COIL COVER

PRESSURE SWITCH

LOW FIRE HIGH FIRE LOW FIRE HIGH FIRE LOW FIRE HIGH FIRE LOW FIRE HIGH FIRE

-0.10 -0.10 20197308 -0.30 -0.75 11177113 -0.10 -0.10 -0.22 -0.55

-0.10 -0.10 20197308 -0.50 -1.10 11177114 -0.10 -0.10 -0.38 -0.82

-0.37 -0.37 20197313 -0.20 -0.55 11177118 -0.37 -0.37 -0.15 -0.30 HAPS31

-0.37 -0.37 20197313 -0.20 -0.55 11177118 -0.37 -0.37 -0.15 -0.30 HAPS31

COIL COVER

PRESSURE

SWITCH

PART #

TRIP POINT

ID BLOW ER

PRESSURE SWITCH

ID BLOW ER

PRESSURE

SWITCH

PART #

TRIP POINT

COIL COVER

PRESSURE SWITCH

7,001 ft. to 11,000 ft.

TRIP POINT
ID BLOWER

PRESSURE SWITCH

HIGH

ALTITUDE

KIT

HAPS28

11177115

HAPS29

11177116

9