TECHNICAL MANUAL
AMH8 33-3/8" 80% Gas Furnace
80% AFUE, Twin Comfort™,
Multi-Speed, Upflow/Horizontal (NOx)
•
•
•
•
Refer to Service Manual RS6610004 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.
Model numbers listed on page 3.
®
US
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 or services performed by an unqualified person.
RT6621017r1
April 2010
®
is a registered trademark of Maytag Corporation or its related companies
and is used under license to Goodman Company, L.P., Houston, TX. All rights reserved.
Copyright ©2009-2010 Goodman Company, L.P.
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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.
AMH80453AXC*
AMH80703AXC*
AMH80704BXC*
AMH80903BXC*
AMH80904BXC*
AMH80905CXC*
AMH81155CXC*
AMH81405DXC*
* Indicates minor revision & is not used for order entry or inventory management
The United States Environmental Protection Agency (“EPA”) has issued various regulations re-
garding the introduction and disposal of refrigerants introduced into this unit. Failure to follow
WARNING
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
To prevent the risk of property
WARNING
WARNING
that is not design certified by
Goodman for use with this unit.
damage, personal injury, or death,
do not store combustible materials or use gasoline or
other flammable liquids or vapors in the vicinity of this
appliance.
Serious property damage, personal injury, reduced unit
performance and/or hazardous conditions may result
from the use of such non-approved devices.
3
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PRODUCT DESIGN
General Operation
The AMH8 furnaces are equipped with an electronic ignition
device used to light the burners and an induced draft blower
to exhaust combustion products.
WARNING
O PREVENT POSSIBLE PERSONAL INJURY OR DEATH DUE TO ASPHYXIATION,
T
THIS FURNACE MUST BE ATEGORY VENTED.
O NOT VENT USING
D
C
I
An interlock switch prevents furnace operation if the blower
door is not in place. Keep the blower access door in place
except for inspection and maintenance.
CATEGORY III VENTING.
1. Category I Venting is venting at a non-positive pressure.
A furnace vented as Category I is considered a fan-as-
sisted appliance and the vent system does not have to
be “gas tight.” NOTE: Single stage gas furnaces with
induced draft blowers draw products of combustion
through a heat exchanger allowing, in some instances,
common venting with natural draft appliances (i.e. water
heaters). All installations must be vented in accordance
with National Fuel Gas Code NFPA 54/ANSI Z223.1 -
latest edition. In Canada, the furnaces must be vented in
accordance with the National Standard of Canada, CAN/
CSA B149.1 and CAN/CSA B149.2 - latest editions and
amendments.
This furnace is also equipped with a self-diagnosing elec-
tronic control module. In the event a furnace component is
not operating properly, the control module LED will flash on
and off in a factory-programmed sequence, depending on
the problem encountered. This light can 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 Ignition 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 Con-
tractors of America.
NOTE: The vertical height of the Category I venting system
must be at least as great as the horizontal length of the
venting system.
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.
*Obtain from: American National Standards Institute 1430
Broadway New York, NY 10018
3. Conversion kits for propane gas and high altitude natural
and propane gas operation are available. See High Alti-
tude Derate chart for details.
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 3/8” 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 ve-
hicles.
4
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PRODUCT DESIGN
Accessibility Clearances (Minimum)
High Altitude Derate
Unobstructed front clearance of 24" for servicing is rec- When this furnace is installed at high altitude, the appropri-
ommended.
ate High Altitude orifice kit must be installed. This is re-
quired 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.
MINIMUM CLEARANCE TO COMBUSTIBLE MATERIALS - INCHES
Vent
Sides
1
Rear
0
Front*
3
Top
1
SW
6
B
1
INPUT PER BURNER
-
22,500 BTUH NATURAL GAS / 20,000 BTUH L.P.
ELEVATION ABOVE SEA-LEVEL (FEET)
*
24" clearance for serviceability recommended.
** Single Wall Vent (SW) to be used only as a conncetor.
Refer to the venting tables outlined in the Installation Manual for
additional venting requirements.
2000
3000
4000
4500
5000
6000
7000
8000
US BURNER
ORIFICE
44/55
44/55
44/55
45/56
45/56
46/57
47/58
47/58
CANADA BURNER
ORIFICE
47/57
Note: In all cases accessibility clearance shall take prece-
dence over clearances from the enclosure where accessi-
bility clearances are greater. All dimensions are given in
inches.
HA-02 HIGH ALTITUDE CONVERSION KIT REQUIRED
Tabled data is based upon the furnace input being reduced for altitudes above sea level. U.S. 4% per 1,000 feet.
Canada 10% derate for 2,000-4,000 feet.
High altitude kits are purchased according to the installa-
tion 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 Natu-
ral Gas and Propane Gas kits. For a tabular listing of appro-
priate 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 Ac-
cessory Charts in Service Instructions.
5
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COMPONENT IDENTIFICATION
Tubular Heat Exchanger
1
2 Pressure Switch
3
Flue Pipe Connection
Induced Draft Blower
4
躀
Gas Line
Entrance
5
6
Gas Valve
7
Rollout Limit
8
Junction Box
Wiring Harness
Grommet
9
Gas Manifold
Inshot Burner
Gas Line Entrance
(Alternate)
Transformer
Circulator Blower
Blower Door
Interlock Switch
Note: Primary Limit Not Shown
Integrated Control Module
Upflow/Horizontal
1
2
3
4
5
6
7
8
Tubular Heat Exchanger
9 Wiring Harness Grommet
Pressure Switch
Flue Pipe Connection
Induced Draft Blower
Gas Line Entrance
Gas Valve
10 Gas Manifold
11 Inshot Burner
12 Transformer
13 Integrated Control Module
14 Blower Door Interlock Swtich
15 Circulator Blower
Rollout Limit
Junction Box
16 Gas Line Entrance (Alternate)
6
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PRODUCT DIMENSIONS
AMH8
Alt. Gas Inlet
Alt. Gas Inlet
Alt. High Voltage
Alt. LowVoltage
High Voltage Inlet
Low Voltage
MODELS
A
B
AMH80453AX**
AMH80703AX**
14
12-1/2
AMH80704BX**
AMH80903BX**
AMH80904BX**
17-1/2
16
AMH80905CX**
AMH81155CX**
21
19-1/2
23
AMH81405DX**
24-1/2
All dimensions are in inches.
7
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PRODUCT DESIGN
PRESSURE SWITCH TRIP POINTS
PRESSURE SWITCH TRIP POINTS
AND USAGE CHART
AND USAGE CHART
SQUARE NOSE
ROUND NOSE
TRIP POINT
ID BLOWER
PRESSURE
SWITCH
ID BLOWER
PRESSURE
SWITCH
TRIP POINT
ID BLOWER
PRESSURE
SWITCH
ID BLOWER
PRESSURE
SWITCH
PART #
MODEL
MODEL
PART #
AMH80453AX**
AMH80703AX**
AMH80704BX**
AMH80903BX**
AMH80904BX**
AMH80905CX**
AMH81155CX**
AMH81405DX**
-0.60
-0.60
-0.60
-0.60
-0.60
-0.70
-0.70
-0.75
B1370142
B1370142
B1370142
B1370142
B1370142
B1370158
B1370158
013070159
AMH80453AX**
AMH80703AX**
AMH80704BX**
AMH80903BX**
AMH80904BX**
AMH80905CX**
AMH81155CX**
AMH81405DX**
-0.60
-0.60
-0.47
-0.75
-0.75
-0.60
-0.70
-0.60
B1370142
B1370142
B1370176
B1370179
B1370179
B1370142
B1370158
013070142
For installaions in Canada, the AMH8 furnace is certified only to 4,500 ft.
* Negative pressure readings are in inches of water column (*w.c.)
PRIMARY LIMIT
Part Number
0130F00035
20162906
20162903
0130F00036
Open Setting (°F)
220
170
160
180
AM H80453A*
AM H80703A*
AMH80704B*
AMH80903B*
AMH80904B*
AMH80905C*
AMH81155C*
AMH81405D*
1
---
1
---
---
---
---
1
---
---
---
---
---
1
---
---
---
---
---
---
---
1
1
---
---
---
---
---
---
1
1
---
ROLLOUT LIMIT SWITCHES
AUXILIARY LIMIT SWITCHES
Part Number
10123529
Part Number
0130F00038
Open Setting (°F)
Open Setting (°F)
300
2
120
1
AMH80453AX**
AMH80703AX**
AMH80704BX**
AMH80903BX**
AMH80904BX**
AMH80905CX**
AMH81155CX**
AMH81405DX**
AMH80453A*
AMH80703A*
AMH80704B*
AMH80903B*
AMH80904B*
AMH80905C*
AMH81155C*
AMH81405D*
2
1
2
1
2
1
2
2
2
2
1
1
1
1
8
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PRODUCT DESIGN
Coil Matches:
A large array of Amana® brand coils are available for use with the AMH8 furnaces, in either upflow or horizontal applica-
tions. These coils are available in both cased and uncased models (with the option of a field installed TXV expansion
device). These 80% furnaces match up with the existing Amana® brand coils as shown in the chart below.
Coil Matches (Amana® brand units using R22 and R-410A):
C
A
P
F 1824 A
6
A
EXPANSION
DEVICE:
F: Flowrater
REVISION
A: Revision
PRODUCT
TYPE:
C: Indoor Coil
REFRIGERANT
CHARGE:
6: R-410A or R-22
2: R-22
CABINET FINISH:
U: Unpainted
P: Painted
4: R-410a
N: Unpainted Case
NOMINAL WIDTH FOR GAS FURNACE
A: Fits 14" Furnace Cabinet
B: Fits 17 1/2" Furnace Cabinet
C: Fits 21" Furnace Cabinet
D: Fits 24 1/2" Furnace Cabinet
N: Does Not Apply (Horizontal Slab Coils)
APPLICATION
A: Upflow/Downflow Coil
H: Horizontal A Coil
S: Horizontal Slab Coil
NOMINAL CAPACITY RANGE
@ 13 SEER
1824: 1 1/2 to 2 Tons
3030: 2 1/2 Tons
3636: 3 Tons
3642: 3 to 3 1/2 Tons
4860: 4 & 5 Tons
• All CAPF coils in B, C, & D widths have insulated blank off plates for use with one size smaller furnaces.
• All CAPF coils have a CAUF equivalent.
• All CHPF coils in B, C & D heights have an insulated Z bracket for use with one size smaller furnace.
• All proper coil combinations are subject to being ARI rated with a matched outdoor unit.
9
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PRODUCT DESIGN
Thermostats:
The following Amana® brand Thermostats are suggested for use with the AMH8 Furnace Models:
THERMOSTATS
Thermostat
CHT-18-60
CH70TG
Mech./Digital
Mechanical
Digital
Programmable
Cool
Yes
Yes
Yes
No
Heat
Yes
Yes
Yes
Yes
Yes
No
CHSATG
H20TWR
Mechanical
Mechanical
Yes
Yes
Filters:
Filters are required with this furnace and must be provided by the installer. The filters used must comply with UL900 or
CAN/ULCS111 standards. Installing this furnace without filters will void the unit warranty.
Upflow Filters
Side Return(s)
Bottom Return
Approx.
Approx.
Flow Area
Cabinet
Width
(in.)
Nominal
Filter Size
(in.)
Cabinet
Width
(in.)
Nominal
Filter Size
(in.)
Flow Area
(in2)
(in2)
300
350
400
500
All
16 x 25 x 1
400
14
12 x 25 x 1
14 x 25 x 1
16 x 25 x 1
20 x 25 x 1
17-1/2
21
24-1/2
RefertoMinimumFilterAreatablestodeterminefilterarearequirement. NOTE:Filterscanalsobeinstalledelsewherein
the duct system such as a central return.
MINIMUM FILTER SIZES
FURNACE INPUT
FILTER SIZE
160 in2
241 in2
320 in2
400 in2
370 in2
320 in2
483 in2
640 in2
800 in2
738 in2
TYPE
45M
permanent
70M
90M
permanent
permanent
permanent
permanent
disposable
disposable
disposable
disposable
disposable
115M
140M
45M
70M
90M
115M
140M
PERMANENT NOMINAL 600 F.M. FACE VELOCITY
DISPOSABLE NOMINAL 300 F.M. FACE VELOCITY
10
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PRODUCT DESIGN
TwinComfort™ Configuration & Operation
TwinComfort™
This furnace is capable of the following heating modes:
• Single Stage (Factory Setting)
• Modified Two-Stage
> Fixed 5-Min. Low Stage
> Auto Time (1-12 Min.) Low Stage
To change from the factory single-stage operation,
adjust the dipswitches on the ignition control as follows:
OFF
ON
MODE
MODE DIP SWITCH
5 MIN. FIXED
AUTO
2ND STAGE DELAY
DIPSWITCH
Note: This furnace is designed to be used
with a single-stage room thermosat.
Start
Start
Call for Heat
Call for Heat
Safety Circuit Check
Safety Circuit Check
Start Furnace
in Low Stage
Start Furnace
in Low Stage
Low-Heat Blower
Low-Heat Blower
Delay Time (5 Min)
Delay Time 1-12 Min)
Gas Valve Switch
to 2nd Stage
Gas Valve Switch
to 2nd Stage
Blower Switch to
Hi Heat Operation
Blower Switch to
Hi Heat Operation
T-Stat Satisfied
T-Stat Satisfied
11
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FURNACE SPECIFICATIONS
MODEL
Input, Natural Gas (BTUH)
Output, Natural Gas (BTUH) 1
Output, LP (BTUH)
45,000
36,000
32,000
80.0%
0.20 - 0.50
25 - 55
-0.70
10x6
1/3
70,000
56,000
48,000
80.0%
0.20 - 0.50
25 -55
-0.70
10x6
1/3
70,000
56,000
48,000
80.0%
0.20 - 0.50
20 - 50
-0.75
10x8
1/2
90,000
72,000
64,000
80.0%
0.20 - 0.50
35 - 65
-0.75
10x8
1/3
90,000
72,000
64,000
80.0%
0.20 - 0.50
35 - 65
-0.75
10x8
1/2
90,000
72,000
64,000
80.0%
0.20 - 0.50
35 - 65
-0.75
10x10
1/2
115,000
92,000
80,000
80.0%
0.20 - 0.50
35 - 65
-0.90
10x10
1/2
140,000
112,000
96,000
80.0%
0.20 - 0.50
40 - 70
-0.80
11x10
3/4
A.F.U.E.
Rated External Static (" w.c.)
Temperature Rise (°F)
Pressure Switch Trip Point (" w.c.)
Blower Wheel (D" x W")
Blower Horsepower
Blower Speeds
4
4
4
4
4
4
4
4
Max CFM @ 0.5 E.S.P.
Power Supply (Volts/Hz/Ph)
1280
115/60/1
8.1
1100
115/60/1
8.1
1610
115/60/1
12.5
1439
115/60/1
8.1
1738
115/60/1
12.5
15
1854
115/60/1
12.5
1902
115/60/1
12.5
15
2084
115/60/1
14.7
Minimum Circuit Ampacity (MCA) 2
Maximum Overcurrent Device 3
Transformer (VA)
15
15
15
15
15
15
40
40
40
40
40
40
40
40
Primary Limit Setting (°F)
Auxiliary Limit Setting (°F)
Rollout Limit Setting (°F)
Fan Delay On Heating
Off Heating *
220
170
170
170
160
180
180
160
120
120
120
120
120
120
120
120
300
300
300
300
300
300
300
300
30
30
30
30
30
30
30
30
150
150
150
150
150
150
150
150
Fan Delay On Cooling
Off Cooling
5
5
5
5
5
5
5
5
45
45
45
45
45
45
45
45
Fan Delay On - Fan Only
Gas Supply Pressure
(Natural/Propane) (" w.c.)
Manifold Pressure
0
0
0
0
0
0
0
0
7 / 11
3.5 / 10
43 / 55
2
7 / 11
3.5 / 10
43 / 55
3
7 / 11
3.5 / 10
43 / 55
3
7 / 11
3.5 / 10
43 / 55
4
7 / 11
3.5 / 10
43 / 55
4
7 / 11
3.5 / 10
43 / 55
4
7 / 11
3.5 / 10
43 / 55
5
7 / 11
3.5 / 10
43 / 55
6
(Natural/Propane) (" w.c.)
Orifice Size (Natural/Propane)
Number of Burners
Vent Connector Diameter (inches)
Shipping Weight (lbs.)
4
4
4
4
4
4
4
4
115
125
136
146
146
154
154
153
*Off Heating - This fan delay timing is adjustable (90, 120, 150 or 180 seconds). 150 seconds as shipped.
1. These furnaces are manufactured for natural gas operation. Optional kits are available for conversion to propane operation.
2. Minimum Circuit Ampacity calculated as: (1.25 x Circulator Blower Amps) + I.D. Blower Amps. Wire sizes should be determined in accordance
with National Electrical Codes.Extensive wire runs will require larger wire sizes.
3
Maximum Overcurrent protections Device refers to maximum recommended fuse or circult breaker size. May use time delay fuses or HACR-
type circuit breakers of the same sizes as noted.
NOTES:
1. For elevations above 2000 feet the rating should be reduced by 4% for each 1000 feet above sea level. The furnace must not be derated,
orifice changes should only be made if necessary for altitude.
2. The total heat loss from the structure as expressed in TOTAL BTU/HR must be calculated by the manufacturers method or in accordance with
the "A.S.H.R.A.E. GUIDE" or "MANUAL J-LOAD CALCULATIONS" published by the AIR CONDITIONING CONTRACTORS OF AMERICA. The total
heat loss calculated should be equal to or less than the heating capacity. Output based on D.O.E. test procedures, steady state efficiency times
output.
12
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BLOWER PERFORMANCE SPECIFICATIONS
(CFM & Temperature Rise vs. External Static Pressure)
EXTERNAL STATIC PRESSURE (Inches Water Column)
0.2 0.3 0.4 0.5 0.6 0.7 0.8
Model
Tons AC
at 0.5"
Motor
Speed
0.1
Heating Speed
As Shipped
(
)
ESP CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM CFM CFM
HIGH
MED
3.0
2.5
2.0
1.5
3.0
2.5
2.0
1.5
4.0
3.5
3.0
2.5
3.0
2.5
2.0
1.5
4.0
3.5
3.0
2.5
5.0
4.0
3.5
3.0
5.0
4.0
3.5
3.0
5.0
4.0
3.5
3.0
1521 22 1466 23 1414 24 1373 24 1298 26 1243 1164 1075
1160 29 1160 29 1132 29 1121 30 1082 31 1042 997 925
*M(H/S)80453A***
(MEDIUM)
MED-LO
LOW
961
781
35
43
955
785
35
42
948
781
35
43
932
773
36
43
913
761
37
44
882 821 803
745 716 668
HIGH
1422 36 1352 38 1307 40 1197 43 1157 45 1092 1075 983
1098 47 1081 48 1051 49 1039 50 1021 51 983 924 868
*M(H/S)80703A***
(MEDIUM)
MED
MED-LO
LOW
919
758
56
913
57
892
741
58
847
----
----
829
699
---- 818 792 728
---- 677 649 626
---- 741
----
---- 733
HIGH
2134 ---- 2100 25 2042 25 1975 26 1883 28 1786 1700 1601
1668 31 1663 31 1656 31 1645 32 1616 32 1549 1492 1391
1419 37 1426 36 1426 36 1432 36 1419 37 1378 1328 1261
1134 46 1145 45 1166 44 1171 44 1160 45 1144 1111 1071
1607 41 1572 42 1547 43 1498 45 1448 46 1390 1302 1222
1159 58 1156 58 1145 58 1127 59 1108 60 1075 1033 957
*M(H/S)80704B***
(MEDIUM)
MED
MED-LO
LOW
HIGH
*M(H/S)80903B***
(MEDIUM)
MED
MED-LO
LOW
938
785
---- 916
---- 766
----
----
916
743
---- 900
---- 730
----
----
889
709
---- 865 829 785
---- 683 666 604
HIGH
2051 ---- 1983 ---- 1895 35 1812 37 1725 39 1627 1530 1439
1736 38 1708 39 1652 40 1611 41 1540 43 1475 1394 1307
1493 45 1668 40 1459 46 1429 47 1389 48 1339 1274 1204
1200 56 1185 56 1180 56 1173 57 1158 58 1125 1125 1080
2290 ---- 2229 ---- 2155 ---- 2047 ---- 1960 ---- 1837 1712 1584
1852 36 1820 37 1777 38 1719 39 1641 41 1567 1469 1382
1615 41 1592 42 1556 43 1516 44 1470 45 1405 1346 1235
1290 52 1285 52 1265 53 1235 54 1214 55 1174 1044 904
2323 37 2225 38 2120 40 2040 42 1974 43 1801 1688 1577
1858 46 1847 46 1799 47 1744 49 1674 51 1577 1493 1399
1596 53 1587 54 1571 54 1552 55 1493 57 1397 1326 1217
1291 ---- 1272 ---- 1261 ---- 1257 ---- 1205 ---- 1168 1118 1060
2469 42 2389 43 2300 45 2223 47 2131 49 2027 1902 1786
1575 66 1558 67 1545 67 1513 69 1500 69 1419 1354 1271
1402 ---- 1380 ---- 1343 ---- 1319 ---- 1296 ---- 1245 1183 1106
1200 ---- 1186 ---- 1161 ---- 1127 ---- 1082 ---- 1042 995 926
*M(H/S)80904B***
(MEDIUM)
MED
MED-LO
LOW
HIGH
*M(H/S)80905C***
(MEDIUM)
MED
MED-LO
LOW
HIGH
*M(H/S)81155C***
(MEDIUM)
MED
MED-LO
LOW
HIGH
*M(H/S)81405D***
(MEDIUM)
MED
MED-LO
LOW
NOTES:
1. CFM in chart is without filters(s). Filters do not ship with this furnace, but must be provided by the installer.
2. All furnaces ship as high speed cooling. Installer must adjust blower cooling speed as needed.
3. For most jobs, about 400 CFM per ton when cooling is desirable.
4. INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.
5. The chart is for information only. For satisfactory operation, external static pressure must not exceed value shown on rating plate. The shaded area indicates
ranges in excess of maximum external static pressure allowed when heating. The data for 0.6" w.c. to 0.8" w.c. is shown for air conditioning purposes only.
6
The dashed (---) areas indicate a temperature rise not recommended for this model.
7. The above chart is for U.S. furnaces installed at 0-2000 feet. At higher altitudes, a properly derated unit will have approximately the same temperature rise at a
particular CFM, while the ESP at that CFM will be lower.
13
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BLOWER PERFORMANCE SPECIFICATIONS
E I S E U A T P E T E
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WIRING DIAGRAMS
AMH8_CA/CB
INTEGRATED
CONTROL MODULE
HUMIDIFIER
XFMR (6)
WARNING:DISCONNECT POWER BEFORE
SERVICING.WIRING TO UNIT MUST BE
PROPERLY POLARIZEDAND GROUNDED.
GND
GND (8)
MVC (9)
24 VAC
HUMIDIFIER
C2
GAS
HI VALVE
MVH (12)
MVL (2)
M1
C
ID BLOWER
PRESSURE
SWITCH
C
G
R
W
Y
G
Y
NO
C
PS (10)
PSO (4)
5 MIN
2 STG MODE
TO
MICRO HLI (7)
WH
BL
W
7
4
1
8
5
2
HLO (1)
6
3
R
RO2 (11)
RO1 (5)
AUXILIARY
LIMITS
BR
INTEGRATED
CONTROL MODULE
XFMR (3)
24 VAC
40 VA
TRANSFORMER
BR
BL
RD
XFMR-H
115 VAC
XFMR-N
FLAME SENSOR
2
1
FP
HOT SURFACE
IGNITER
IGN
IND
IGN-N
IND-N
PARK
ID
BLWR
BK
BK
24V
CIRCULATOR
BLWR
115V
CIR-N
XFMR
WH
ELECTRONIC
AIR CLEANER
BK
15 PIN PLUG
ON SOME MODELS
EAC-H
LINE-H
GR
EAC-N
LINE-N
BLOWER COMPARTMENT
JUNCTION BOX
BURNER COMPARTMENT
DOOR
SWITCH
24 VAC
HUMIDIFIER
DOOR SWITCH
SWITCH LOCATED IN BLOWER
COMPARTMENT ON SOME MODELS
NO
C
RD
RD
DISCONNECT
PRESSURE
SWITCH
YL
YL
PRIMARY LIMIT
YL
RD
YL
WH
BK
L
GND
N
BR
TO 115VAC/ 1
Ø /60 HZ POWER SUPPLY WITH
BL
OVERCURRENT PROTECTION DEVICE
WH
BK
PM
1
C
2
HI
3
JUNCTION
BOX
HOT
SURFACE
IGNITER
2 STAGE
GAS VALVE
LINE-N
GND
LINE H
PU
INDUCED DRAFT
BLOWER
TO 115 VAC/ 1/60HZ
POWER SUPPLY WITH
OVERCURRENT PROTECTION
DEVICE
PU
PU
FLAME
SENSOR
ROLLOUT LIMITS
(SINGLE CONTROL ON SOME MODELS)
0
STEADY ON = NORMAL OPERATION
LOW VOLTAGE (24V)
EQUIPMENT GND
FIELD GND
OFF
= CONTROL FAILURE
LOW VOLTAGE FIELD
HI VOLTAGE (115V)
HI VOLTAGE FIELD
JUNCTION
1
2
3
4
5
6
7
8
C
1 FLASH
=
SYSTEM LOCKOUT (RETRIES/RECYCLES EXCEEDED)
2 FLASHES = PRESSURE SWITCH STUCK CLOSED
3 FLASHES = PRESSURE SWITCH STUCK OPEN
4 FLASHES = OPEN HIGH LIMIT
FIELD SPLICE
SWITCH (TEMP.)
IGNITER
5 FLASHES = FLAME SENSE WITHOUT GAS VALVE
TERMINAL
6 FLASHES =
OPEN ROLLOUT OR OPEN FUSE
SWITCH (PRESS.)
INTERNAL TO
INTEGRATED CONTROL
7 FLASHES = LOW FLAME SIGNAL
OVERCURRENT
PROT. DEVICE
8 FLASHES = CHECK IGNITER OR IMPROPER GROUND
RAPID FLASHES = REVERSED 115 VAC POLARITY/VERIFY GND
PLUG CONNECTION
NOTES:
1. SET HEAT ANTICIPATOR ON ROOM THERMOSTAT AT 0.7 AMPS.
PK PINK
COLOR CODES:
YL YELLOW
OR ORANGE
PU PURPLE
GR GREEN
2. MANUFACTURER'S SPECIFIED REPLACEMENT PARTS MUST BE USED WHEN SERVICING.
3. IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE FURNACE MUST BE
REPLACED, IT MUST BE REPLACED WITH WIRING MATERIAL HAVING A TEMPERATURE
BR BROWN
WH WHITE
BL BLUE
GY GRAY
RD RED
°C. USE COPPER CONDUCTORS ONLY.
RATING OF AT LEAST 105
4. BLOWER SPEEDS SHOULD BE ADJUSTED BY INSTALLER TO MATCH THE INSTALLATION
REQUIREMENTS SO AS TO PROVIDE THE CORRECT HEATING TEMPERATURE RISE AND THE
CORRECT COOLING CFM. (SEE SPEC SHEET FOR AIR FLOW CHART)
BK BLACK
5. UNIT MUST BE PERMANENTLY GROUNDED AND CONFORM TO N.E.C. AND LOCAL CODES.
6. TO RECALL THE LAST 5 FAULTS, MOST RECENT TO LEAST RECENT, DEPRESS SWITCH
FOR MORE THAN 2 SECONDS WHILE IN STANDBY(NO THERMOSTAT INPUTS).
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
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WIRING DIAGRAMS
AMH8_CC
INTEGRATED
HUMIDIFIER
XFMR(6)
WARNING:DISCONNECTPOWERBEFORE
CONTROLMODULE
SERVICING.WIRINGTOUNITMUSTBE
PROPERLYPOLARIZEDANDGROUNDED.
GND
GND(8)
MVC(9)
24VAC
HUMIDIFIER
C2
HI
GAS
VALVE
MVH(12)
MVL(2)
M1
C
IDBLOWER
PRESSURE
SWITCH
AUXILIARY
LIMITCONTROLS
C
G
R
W
Y
G
Y
NO
PS(10)
PSO(4)
C
AUTO
1STG
150SEC
5MIN
2STG
MODE
H
T
TO
100SEC
O
F
F
MICRO HLI(7)
D
10 11 12
L
Y
WH
W
7
4
1
8
5
2
9
6
3
BL
HLO(1)
AUTORESET
PRIMARY
LIMIT
FUSE
R
RO2(11)
RO1(5)
SEENOTE6
BR
CONTROL
AUXILIARY
LIMITS
INTEGRATED
CONTROLMODULE
MANUALRESETROLLOUT
LIMITCONTROL(S)
(SINGLECONTROLONSOMEMODELS)
XFMR(3)
FS
24VAC
40VA
TRANSFORMER
BR
BL
RD
XFMR-H
XFMR-N
115VAC
FLAMESENSOR
2
1
FP
HOTSURFACE
IGNITER
XFMR-H LINE-H EAC-H
IGN
IND
IGN-N
PARK
ID
BLWR
BK
IND-N
L
H
O
E
A
T
-
BK
24V
H
COOL-H
I
CIRCULATOR
BLWR
115V
CIR-N
H
E
H
-
XFMR
T
A
H
WH
BK
ELECTRONIC
AIRCLEANER
15PINPLUG
ONSOMEMODELS
EAC-H
LINE-H
GR
EAC-N
BLOWERCOMPARTMENT
LINE-N
JUNCTIONBOX
BURNERCOMPARTMENT
DOOR
SWITCH
24VAC
HUMIDIFIER
DOORSWITCH
SWITCHLOCATEDINBLOWER
COMPARTMENTONSOMEMODELS
NO
C
WARNING:
RD
RD
DISCONNECTPOWER
BEFORESERVICING.
WIRINGTOUNIT
MUSTBE
PROPERLY
POLARIZED
DISCONNECT
PRESSURE
SWITCH
YL
YL
PRIMARYLIMIT
YL
RD
YL
WH
BK
ANDGROUNDED.
L
GND
N
BR
BL
OVERCURRENTPROTECTIONDEVICE
WH
BK
PM
1
C
3
HI
2
JUNCTION
BOX
HOT
SURFACE
IGNITER
2STAGE
GASVALVE
(HONEYWELL)
LINE-N
GND
LINEH
PU
INDUCEDDRAFT
BLOWER
TO115VAC/1/60HZ
POWERSUPPLYWITH
OVERCURRENTPROTECTION
DEVICE
PU
PU
FLAME
SENSOR
ROLLOUTLIMITS
(SINGLECONTROLONSOMEMODELS)
0
STEADYON=NORMALOPERATION
LOWVOLTAGE(24V)
LOWVOLTAGEFIELD
HIVOLTAGE(115V)
HIVOLTAGEFIELD
EQUIPMENTGND
FIELDGND
OFF
=CONTROLFAILURE
1
2
3
4
5
6
1FLASH
=
SYSTEMLOCKOUT(RETRIES/RECYCLESEXCEEDED)
2FLASHES=PRESSURESWITCHSTUCKCLOSED
3FLASHES=PRESSURESWITCHSTUCKOPEN
4FLASHES=OPENHIGHLIMIT
FIELDSPLICE
SWITCH(TEMP.)
IGNITER
JUNCTION
TERMINAL
INTERNALTO
5FLASHES=FLAMESENSEWITHOUTGASVALVE
6FLASHES=
OPENROLLOUTOROPENFUSE
SWITCH(PRESS.)
7FLASHES=LOWFLAMESIGNAL
7
8
INTEGRATEDCONTROL
OVERCURRENT
PROT.DEVICE
8FLASHES=CHECKIGNITERORIMPROPERGROUND
RAPIDFLASHES=REVERSED115VACPOLARITY/VERIFYGND
PLUGCONNECTION
C
NOTES:
1.SETHEATANTICIPATORONROOMTHERMOSTATAT0.7AMPS.
2.MANUFACTURER'SSPECIFIEDREPLACEMENTPART SMUSTBEUSEDWHENSERVICING.
3.IFANYOFTHEORIGINALWIREASSUPPLIEDWITHTHEFURNACEMUSTBE
PKPINK
COLORCODES:
YL YELLOW
OR ORANGE
PUPURPLE
GRGREEN
BRBROWN
WH WHITE
BLBLUE
REPLACED,ITMUSTBEREPLACEDWITHWIRINGMATERIALHAVINGATEMPERATURE
RATINGOFATLEAST105
°C.USECOPPERCONDUCTORSONLY.
4.BLOWERSPEEDSSHOULDBEADJUSTEDBYINSTALLERTOMATCHTHEINSTALLATION
REQUIREMENTSSOASTOPROVIDETHECORRECTHEATINGTEMPERATURERISEANDTHE
CORRECTCOOLINGCFM.(SEESPECSHEETFORAIRFLOWCHART)
GYGRAY
RD RED
BKBLACK
5.UNITMUSTBEPERMANENTLYGROUNDEDANDCONFORMTON.E.C.ANDLOCALCODES.
6.TORECALLTHELAST5FAULTS,MOSTRECENTTOLEASTRECENT,DEPRESSSWITCH
FORMORETHAN2SECONDSWHILEINSTANDBY(NOTHERMOSTATINPUTS).
0140F00662 REV.A
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
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SCHEMATICS
HIGH VOLTAGE!
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.
ATOR
CIRCUL
BLOWER
ELECTRONIC
AIR CLEANER
NDUCER
I
HI
HEAT
LO
HEAT
CIR
NEU
C
EA
PARK
IND
COOL
EAC
NEU
R
K2 K2
RO2
RO1
ROLLOUT
SWITCH
K3
K6
K3
K1
TH
K7
XFMR
HOT
24 VAC
XFMR
NEU
.0005
3M
COMPRESSOR
TACTOR
CON
FACTORY
JUMPER
TR
C
K5
R
COIL
K4
FACTORY
JUMPER
Y
G
W
Y
G
W
GND
IGN
PS
MV MLV
HLI
HLO
FP
PSO
THERMOSTAT
FLAME
SENSOR
PROBE
COM
PM
AUX
LIMIT
HIGH
LIMIT
ITOR
IGN
HI
2-STAGE
ALVE
GAS V
PRESSURE
SWITCH
TYPICAL SCHEMATIC
AMH8 ____** MODEL FURNACES
WR 50M56-289 INTEGRATED IGNITION CONTROL
This schematic is for reference only. Not all wiring is as shown above. Always refer to the appropriate wiring diagram for the unit being serviced.
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