TECHNICAL MANU
AL
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.
®
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.
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.
US
RT6621017r1
April 2010
®
Copyright ©2009-2010 Goodman Company, L.P.
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.
A
M
PRODUCT
TYPE:
®
A: Amana
Brand
H
8
070
3
A
X
ADDITIONAL
FEATURES:
N: Natural Gas
X: Low NOx
FURNACE TYPE:
TM
H: Twin Comfort
Multi-Speed
A
A
MINOR REVISION:
A: Initial Release
CABINET WIDTH:
A: 14"
C: 21"
B: 17 1/2" D: 24 1/2"
SUPPLY TYPE:
M: Upflow/Horizontal
AFUE:
8: 80%
AIRFLOW
CAPABILITY:
3: 1200
4: 1600
5: 2000
MAJOR REVISION:
A: Initial Release
NOMINAL CAPACITY
045: 45,000 BTUH
070: 70,000 BTUH
090: 90,000 BTUH
115: 115,000 BTUH
140: 140,000 BTUH
WARNING
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.
Goodman will not be responsible
for any injury or property damage
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.
WARNING
2
Installation and repair of this unit
should be performed ONLY by
individuals meeting the requirements of an "entry level technician", at a minimum, 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.
WARNING
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
WARNING
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.
Serious property damage, personal injury, reduced unit
performance and/or hazardous conditions may result
from the use of such non-approved devices.
WARNING
To prevent the risk of property
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.
WARNING
3
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.
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.
This furnace is also equipped with a self-diagnosing electronic 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 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 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 vehicles.
4
WARNING
TO PREVENT POSSIBLE PERSONAL INJURY OR DEATH DUE TO ASPHYXIATION,
DO NOT VENT USING
CATEGORY III VENTING.
THIS FURNACE MUST BE CATEGORY I VENTED.
1. Category I Venting is venting at a non-positive pressure.
A furnace vented as Category I is considered a fan-assisted 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.
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.
3. Conversion kits for propane gas and high altitude natural
and propane gas operation are available. See High Altitude Derate chart for details.
PRODUCT DESIGN
Accessibility Clearances (Minimum)
High Altitude Derate
Unobstructed front clearance of 24" for servicing is recommended.
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.
MINIMUM CLEARANCE TO COMBUSTIBLE MATERIALS - INCHES
Sides
Rear
Front*
1
0
3
Vent
SW
B
6
1
Top
1
INPUT PER BURNER - 22,500 BTUH NATURAL GAS / 20,000 BTUH L.P.
* 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.
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.
ELEVATION ABOVE SEA-LEVEL (FEET)
2000
3000
4000
US BURNER
ORIFICE
44/55
44/55
45/56
CANADA BURNER
ORIFICE
44/55
4500
5000
6000
7000
8000
45/56
46/57
47/58
47/58
47/57
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 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.
5
COMPONENT IDENTIFICATION
1 Tubular Heat Exchanger
2 Pressure Switch
3 Flue Pipe Connection
4 Induced Draft Blower
躀
5 Gas Line
Entrance
6 Gas Valve
7 Rollout Limit
8 Junction Box
9 Wiring Harness
Grommet
Gas Manifold
Gas Line Entrance
(Alternate)
Inshot Burner
Transformer
Circulator Blower
Blower Door
Interlock Switch
Integrated Control Module
Note: Primary Limit Not Shown
Upflow/Horizontal
6
1
Tubular Heat Exchanger
9 Wiring Harness Grommet
2
Pressure Switch
10 Gas Manifold
3
Flue Pipe Connection
11 Inshot Burner
4
Induced Draft Blower
12 Transformer
5
Gas Line Entrance
13 Integrated Control Module
6
Gas Valve
14 Blower Door Interlock Swtich
7
Rollout Limit
15 Circulator Blower
8
Junction Box
16 Gas Line Entrance (Alternate)
PRODUCT DIMENSIONS
AMH8
Alt. Gas Inlet
Alt. Gas Inlet
Alt. High Voltage
High Voltage Inlet
Low Voltage
Alt. LowVoltage
MODELS
A
B
AMH80453AX**
AMH80703AX**
14
12-1/2
AMH80704BX**
AMH80903BX**
AMH80904BX**
17-1/2
16
AMH80905CX**
AMH81155CX**
21
19-1/2
AMH81405DX**
24-1/2
23
All dimensions are in inches.
7
PRODUCT DESIGN
PRESSURE SWITCH TRIP POINTS
AND USAGE CHART
PRESSURE SWITCH TRIP POINTS
AND USAGE CHART
SQUARE NOSE
TRIP POINT
ID BLOWER
PRESSURE
SWITCH
ROUND NOSE
TRIP POINT
ID BLOWER
PRESSURE
SWITCH
MODEL
ID BLOWER
PRESSURE
SWITCH
PART #
MODEL
AMH80453AX**
-0.60
B1370142
AMH80453AX**
-0.60
B1370142
AMH80703AX**
-0.60
B1370142
AMH80703AX**
-0.60
B1370142
AMH80704BX**
-0.60
B1370142
AMH80704BX**
-0.47
B1370176
AMH80903BX**
-0.60
B1370142
AMH80903BX**
-0.75
B1370179
AMH80904BX**
-0.60
B1370142
AMH80904BX**
-0.75
B1370179
AMH80905CX**
-0.70
B1370158
AMH80905CX**
-0.60
B1370142
AMH81155CX**
-0.70
B1370158
AMH81155CX**
-0.70
B1370158
AMH81405DX**
-0.75
013070159
AMH81405DX**
-0.60
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
AMH80453A*
1
---
---
---
AMH80703A*
---
1
---
---
AMH80704B*
---
1
---
---
AMH80903B*
---
1
---
---
AMH80904B*
---
---
1
---
AMH80905C*
---
---
---
1
AMH81155C*
---
---
---
1
AMH81405D*
---
---
1
---
ROLLOUT LIMIT SWITCHES
8
ID BLOWER
PRESSURE
SWITCH
PART #
AUXILIARY LIMIT SWITCHES
Part Number
10123529
Part Number
0130F00038
Open Setting (°F)
300
Open Setting (°F)
120
AMH80453AX**
2
AMH80453A*
1
AMH80703AX**
2
AMH80703A*
1
AMH80704BX**
2
AMH80704B*
1
AMH80903BX**
2
AMH80903B*
1
AMH80904BX**
2
AMH80904B*
1
AMH80905CX**
2
AMH80905C*
1
AMH81155CX**
2
AMH81155C*
1
AMH81405DX**
2
AMH81405D*
1
PRODUCT DESIGN
Coil Matches:
A large array of Amana® brand coils are available for use with the AMH8 furnaces, in either upflow or horizontal applications. 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
EXPANSION
DEVICE:
F: Flowrater
PRODUCT
TYPE:
C: Indoor Coil
A
REVISION
A: Revision
REFRIGERANT
CHARGE:
6: R-410A or R-22
2: R-22
4: R-410a
CABINET FINISH:
U: Unpainted
P: Painted
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
PRODUCT DESIGN
Thermostats:
The following Amana® brand Thermostats are suggested for use with the AMH8 Furnace Models:
THERMOSTATS
Thermostat
Mech./Digital
Programmable
Cool
Heat
CHT-18-60
Mechanical
Yes
Yes
Yes
CH70TG
Digital
No
Yes
Yes
CHSATG
Mechanical
Yes
Yes
Yes
H20TWR
Mechanical
Yes
No
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)
Approx.
Cabinet
Nominal
Width
Filter Size Flow Area
(in.)
(in.)
(in2)
All
16 x 25 x 1
400
Bottom Return
Approx.
Cabinet
Nominal
Width
Filter Size Flow Area
(in.)
(in.)
(in2)
14
12 x 25 x 1
300
17-1/2
14 x 25 x 1
350
21
16 x 25 x 1
400
24-1/2
20 x 25 x 1
500
Refer to Minimum Filter Area tables to determine filter area requirement. NOTE: Filters can also be installed elsewhere in
the duct system such as a central return.
MINIMUM FILTER SIZES
FURNACE INPUT
FILTER SIZE
TYPE
45M
2
160 in
permanent
70M
241 in2
permanent
90M
2
permanent
2
permanent
2
permanent
2
disposable
2
disposable
2
disposable
2
disposable
2
disposable
115M
140M
45M
70M
90M
115M
140M
320 in
400 in
370 in
320 in
483 in
640 in
800 in
738 in
PERMANENT NOMINAL 600 F.M. FACE VELOCITY
DISPOSABLE NOMINAL 300 F.M. FACE VELOCITY
10
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 DIP SWITCH
MODE
5 MIN. FIXED
2ND STAGE DELAY
DIPSWITCH
AUTO
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
Blower Switch to
Hi Heat Operation
Gas Valve Switch
to 2nd Stage
Blower Switch to
Hi Heat Operation
T-Stat Satisfied
T-Stat Satisfied
11
AMH80453AX**
AMH80703AX**
AMH80704BX**
AMH80903BX**
AMH80904BX**
AMH80905CX**
AMH81155CX**
AMH81405DX**
FURNACE SPECIFICATIONS
45,000
70,000
70,000
90,000
90,000
90,000
115,000
140,000
36,000
56,000
56,000
72,000
72,000
72,000
92,000
112,000
Output, LP (BTUH)
32,000
48,000
48,000
64,000
64,000
64,000
80,000
96,000
A.F.U.E.
80.0%
80.0%
80.0%
80.0%
80.0%
80.0%
80.0%
80.0%
0.20 - 0.50
0.20 - 0.50
0.20 - 0.50
0.20 - 0.50
0.20 - 0.50
0.20 - 0.50
0.20 - 0.50
0.20 - 0.50
25 - 55
25 -55
20 - 50
35 - 65
35 - 65
35 - 65
35 - 65
40 - 70
Pressure Switch Trip Point (" w.c.)
-0.70
-0.70
-0.75
-0.75
-0.75
-0.75
-0.90
-0.80
Blower Wheel (D" x W")
10x6
10x6
10x8
10x8
10x8
10x10
10x10
11x10
1/3
1/3
1/2
1/3
1/2
1/2
1/2
3/4
4
4
4
4
4
4
4
4
1280
1100
1610
1439
1738
1854
1902
2084
115/60/1
115/60/1
115/60/1
115/60/1
115/60/1
115/60/1
115/60/1
115/60/1
8.1
8.1
12.5
8.1
12.5
12.5
12.5
14.7
15
15
15
15
15
15
15
15
Transformer (VA)
40
40
40
40
40
40
40
40
Primary Limit Setting (°F)
220
170
170
170
160
180
180
160
Auxiliary Limit Setting (°F)
120
120
120
120
120
120
120
120
Rollout Limit Setting (°F)
300
300
300
300
300
300
300
300
Fan Delay On Heating
30
30
30
30
30
30
30
30
150
150
150
150
150
150
150
150
5
5
5
5
5
5
5
5
Off Cooling
45
45
45
45
45
45
45
45
Fan Delay On - Fan Only
0
0
0
0
0
0
0
0
7 / 11
7 / 11
7 / 11
7 / 11
7 / 11
7 / 11
7 / 11
7 / 11
3.5 / 10
3.5 / 10
3.5 / 10
3.5 / 10
3.5 / 10
3.5 / 10
3.5 / 10
3.5 / 10
43 / 55
43 / 55
43 / 55
43 / 55
43 / 55
43 / 55
43 / 55
43 / 55
Number of Burners
2
3
3
4
4
4
5
6
Vent Connector Diameter (inches)
4
4
4
4
4
4
4
4
115
125
136
146
146
154
154
153
MODEL
Input, Natural Gas (BTUH)
Output, Natural Gas (BTUH) 1
Rated External Static (" w.c.)
Temperature Rise (°F)
Blower Horsepower
Blower Speeds
Max CFM @ 0.5 E.S.P.
Power Supply (Volts/Hz/Ph)
Minimum Circuit Ampacity (MCA)
Maximum Overcurrent Device
3
Off Heating *
Fan Delay On Cooling
Gas Supply Pressure
(Natural/Propane) (" w.c.)
Manifold Pressure
(Natural/Propane) (" w.c.)
Orifice Size (Natural/Propane)
Shipping W eight (lbs.)
2
*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 HACRtype 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
BLOWER PERFORMANCE SPECIFICATIONS
(CFM & Temperature Rise vs. External Static Pressure)
Model
(
Heating Speed
As Shipped
)
Motor
Speed
EXTERNAL STATIC PRESSURE (Inches Water Column)
Tons AC
at 0.5"
ESP
0.1
0.2
0.3
0.4
0.6
0.5
0.7
0.8
CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM CFM CFM
HIGH
3.0
1521
22
1466
23
1414
24
1373
24
1298
26
1243 1164 1075
*M(H/S)80453A***
MED
2.5
1160
29
1160
29
1132
29
1121
30
1082
31
1042
997
925
(MEDIUM)
MED-LO
2.0
961
35
955
35
948
35
932
36
913
37
882
821
803
LOW
1.5
781
43
785
42
781
43
773
43
761
44
745
716
668
HIGH
3.0
1422
36
1352
38
1307
40
1197
43
1157
45
1092 1075
983
*M(H/S)80703A***
MED
2.5
1098
47
1081
48
1051
49
1039
50
1021
51
983
924
868
(MEDIUM)
MED-LO
2.0
919
56
913
57
892
58
847
----
829
----
818
792
728
LOW
1.5
758
----
741
----
741
----
733
----
699
----
677
649
626
HIGH
4.0
2134
----
2100
25
2042
25
1975
26
1883
28
1786 1700 1601
*M(H/S)80704B***
MED
3.5
1668
31
1663
31
1656
31
1645
32
1616
32
1549 1492 1391
(MEDIUM)
MED-LO
3.0
1419
37
1426
36
1426
36
1432
36
1419
37
1378 1328 1261
LOW
2.5
1134
46
1145
45
1166
44
1171
44
1160
45
1144 1111 1071
HIGH
3.0
1607
41
1572
42
1547
43
1498
45
1448
46
1390 1302 1222
*M(H/S)80903B***
MED
2.5
1159
58
1156
58
1145
58
1127
59
1108
60
1075 1033
957
(MEDIUM)
MED-LO
2.0
938
----
916
----
916
----
900
----
889
----
865
829
785
LOW
1.5
785
----
766
----
743
----
730
----
709
----
683
666
604
HIGH
4.0
2051
----
1983
----
1895
35
1812
37
1725
39
1627 1530 1439
*M(H/S)80904B***
MED
3.5
1736
38
1708
39
1652
40
1611
41
1540
43
1475 1394 1307
(MEDIUM)
MED-LO
3.0
1493
45
1668
40
1459
46
1429
47
1389
48
1339 1274 1204
LOW
2.5
1200
56
1185
56
1180
56
1173
57
1158
58
1125 1125 1080
HIGH
5.0
2290
----
2229
----
2155
----
2047
----
1960
----
1837 1712 1584
*M(H/S)80905C***
MED
4.0
1852
36
1820
37
1777
38
1719
39
1641
41
1567 1469 1382
(MEDIUM)
MED-LO
3.5
1615
41
1592
42
1556
43
1516
44
1470
45
1405 1346 1235
LOW
3.0
1290
52
1285
52
1265
53
1235
54
1214
55
1174 1044
904
HIGH
5.0
2323
37
2225
38
2120
40
2040
42
1974
43
1801 1688 1577
*M(H/S)81155C***
MED
4.0
1858
46
1847
46
1799
47
1744
49
1674
51
1577 1493 1399
(MEDIUM)
MED-LO
3.5
1596
53
1587
54
1571
54
1552
55
1493
57
1397 1326 1217
LOW
3.0
1291
----
1272
----
1261
----
1257
----
1205
----
1168 1118 1060
HIGH
5.0
2469
42
2389
43
2300
45
2223
47
2131
49
2027 1902 1786
*M(H/S)81405D***
MED
4.0
1575
66
1558
67
1545
67
1513
69
1500
69
1419 1354 1271
(MEDIUM)
MED-LO
3.5
1402
----
1380
----
1343
----
1319
----
1296
----
1245 1183 1106
LOW
3.0
1200
----
1186
----
1161
----
1127
----
1082
----
1042
995
926
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
14
10
20
30
40
50
60
70
30
80
90
100
40
50
60
700
600 CFM
90
100
2000
2200
2400 CFM
1800
1600
1400
OUTPUT BTU/HR x 1000
80
1200
1100
1000
900
70
800
FORMULAS
110
120
130
140
BTU OUTPUT = CFM x 1.08 x RISE
BTU OUTPUT
RISE =
÷ CFM
1.08
BTU OUTPUT vs TEMPERATURE RISE CHART
150
BLOWER PERFORMANCE SPECIFICATIONS
TEMPERATURE RISE
WIRING DIAGRAMS
AMH8_CA/CB
WARNING:DISCONNECT POWER BEFORE
SERVICING.WIRING TO UNIT MUST BE
PROPERLY POLARIZED AND GROUNDED.
INTEGRATED
CONTROL MODULE
HUMIDIFIER
XFMR (6)
GND
GND (8)
24 VAC
HUMIDIFIER
C2
MVC (9)
HI
GAS
VALVE
MVH (12)
G
R
W
Y
5 MIN
2 STG
MODE
WH
7
8
4
5
6
1
2
3
24V THERMOSTAT CONNECTIONS
C
BL
AUXILIARY
LIMITS
BR
INTEGRATED
CONTROL MODULE
M1
MVL (2)
C
ID BLOWER
PRESSURE
SWITCH
G
PS (10)
W
HLO (1)
R
RO2 (11)
RO1 (5)
XFMR (3)
24 VAC
RD
RD
40 VA
TRANSFORMER
BR
BL
NO
C
PSO (4)
TO
MICRO HLI (7)
Y
RD
PU
XFMR-H
115 VAC
XFMR-N
FLAME SENSOR
OR
2
YL
YL
1
FP
BK
BK
24V
BL
IND-N
CIRCULATOR
BLWR
BK
15 PIN PLUG
ON SOME MODELS
GR
ID
BLWR
IND
EAC-H
BLOWER COMPARTMENT
ELECTRONIC
AIR CLEANER
LINE-N
JUNCTION BOX
WH
BK
DOOR
SWITCH
24 VAC
HUMIDIFIER
DOOR SWITCH
SWITCH LOCATED IN BLOWER
COMPARTMENT ON SOME MODELS
NO
EAC-N
LINE-H
BURNER COMPARTMENT
C
OR
RD
CIR-N
CAP
WH
WH
BR
BR
CICULATOR
BLOWER
BR
115V
XFMR
IGN-N
INTEGRATED CONTROL MODULE
PARK
INTEGRATED CONTROL MODULE
BK (HI)
BL (MED)
OR(MED LOW)
RD (LOW)
WH (N)
WH
PU
RD
YL
WH
WH
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.
HOT SURFACE
IGNITER
IGN
PRIMARY LIMIT
PRESSURE
SWITCH
DISCONNECT
YL
RD
YL
YL
WH
BK
L
BL
WH
PM C
1 2
HOT
SURFACE
IGNITER
JUNCTION
BOX
WH
2 STAGE
GAS VALVE
LINE-N
GND
LINE H
PU
INDUCED DRAFT
BLOWER
PU
FLAME
SENSOR
ROLLOUT LIMITS
(SINGLE CONTROL ON SOME MODELS)
0
N
BK
HI
3
PU
GND
TO 115VAC/ 1
Ø /60 HZ POWER SUPPLY WITH
OVERCURRENT PROTECTION DEVICE
BR
TO 115 VAC/ 1/60HZ
POWER SUPPLY WITH
OVERCURRENT PROTECTION
DEVICE
STEADY ON = NORMAL OPERATION
OFF
LOW VOLTAGE (24V)
= CONTROL FAILURE
1
1 FLASH =
2
2 FLASHES = PRESSURE SWITCH STUCK CLOSED
3
3 FLASHES = PRESSURE SWITCH STUCK OPEN
4
4 FLASHES = OPEN HIGH LIMIT
5
5 FLASHES = FLAME SENSE WITHOUT GAS VALVE
6
6 FLASHES = OPEN ROLLOUT OR OPEN FUSE
SYSTEM LOCKOUT (RETRIES/RECYCLES EXCEEDED)
7
7 FLASHES = LOW FLAME SIGNAL
8 FLASHES = CHECK IGNITER OR IMPROPER GROUND
C
RAPID FLASHES = REVERSED 115 VAC POLARITY/VERIFY GND
PK PINK
BR BROWN
WH WHITE
BL BLUE
GY GRAY
RD RED
HI VOLTAGE (115V)
EQUIPMENT GND
FIELD GND
FIELD SPLICE
HI VOLTAGE FIELD
SWITCH (TEMP.)
8
COLOR CODES:
YL YELLOW
OR ORANGE
PU PURPLE
GR GREEN
BK BLACK
LOW VOLTAGE FIELD
JUNCTION
TERMINAL
INTERNAL TO
INTEGRATED CONTROL
PLUG CONNECTION
IGNITER
SWITCH (PRESS.)
OVERCURRENT
PROT. DEVICE
NOTES:
1. SET HEAT ANTICIPATOR ON ROOM THERMOSTAT AT 0.7 AMPS.
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
RATING OF AT LEAST 105 °C. USE COPPER CONDUCTORS ONLY.
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)
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.
15
WIRING DIAGRAMS
AMH8_CC
WARNING:DISCONNECTPOWERBEFORE
SERVICING.WIRINGTOUNITMUST BE
PROPERLYPOLARIZEDANDGROUNDED.
INTEGRATED
CONTROLMODULE
HUMIDIFIER
XFMR(6)
GND
GND(8)
24 VAC
HUMIDIFIER
C2
MVC(9)
HI
MVH(12)
MVL(2)
C
GAS
VALVE
M1
IDBLOWER
PRESSURE
SWITCH
AUXILIARY
LIMITCONTROLS
G
R
W
Y
DL
TG
DS
5MIN
2N
2STG
MODE
100SEC HTO
FFD
LY
Y
AUTO
1STG
150SEC
12
7
8
9
4
5
6
1
2
3
WH
BL
DIAGNOSTIC
LED
10 11
FUSE
SEENOTE6
BR
FS
PS(10)
RD
RD
W
HLO(1)
AUTORESET
PRIMARY
LIMIT
CONTROL
R
RO2(11)
RO1(5)
MANUALRESETROLLOUT
LIMITCONTROL(S)
(SINGLECONTROLONSOMEMODELS)
24VAC
XFMR(3)
40VA
TRANSFORMER
COOL-H LO HEAT-H
PU
OR
LINENEUTRAL
YL
YL
1
XFMR-H
XFMR-N
115VAC
FLAMESENSOR
FP
HOTSURFACE
IGNITER
XFMR-H LINE-H EAC-H
24V
BL
ID
BLWR
IND
IND-N
HE LO
AT
-H
COOL-H CIRCULATOR
BLWR
HI -H
AT
HE
BK
15PINPLUG
ONSOMEMODELS
GR
EAC-H
BLOWERCOMPARTMENT
ELECTRONIC
AIRCLEANER
LINE-N
JUNCTIONBOX
BK
WH
NO
C
OR
RD
DOOR
SWITCH
24VAC
HUMIDIFIER
DOORSWITCH
SWITCHLOCATEDINBLOWER
COMPARTMENTONSOMEMODELS
WH
WH
YL
PRIMARYLIMIT
EAC-N
LINE-H
BURNERCOMPARTMENT
RD
CIR-N
CAP
WH
WH
BR
BR
CICULATOR
BLOWER
BR
115V
XFMR
IGN-N
INTEGRATEDCONTROLMODULE
BK
INTEGRATEDCONTROLMODULE
BK(HI)
BL(MED)
OR(MEDLOW)
RD(LOW)
WH(N)
PU
WH
IGN
PARK
BK
NO
C
PSO(4)
TO
MICRO HLI(7)
Y
BR
BL
RD
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.
AUXILIARY
LIMITS
G
HI HEAT-H
INTEGRATED
CONTROLMODULE
2
24VTHERMOSTATCONNECTIONS
C
PRESSURE
SWITCH
YL
RD
YL
YL
WH
WARNING:
DISCONNECTPOWER
BEFORE SERVICING.
WIRINGTOUNIT
MUSTBE
PROPERLY
POLARIZED
AND GROUNDED.
BK
DISCONNECT
L
GND
N
BR
BL
OVERCURRENTPROTECTIONDEVICE
WH
PM C
1
3
HOT
SURFACE
IGNITER
HI
2
BK
JUNCTION
BOX
WH
2STAGE
GASVALVE
(HONEYWELL)
LINE-N
GND
LINEH
PU
INDUCEDDRAFT
BLOWER
PU
PU
FLAME
SENSOR
ROLLOUTLIMITS
(SINGLECONTROLONSOMEMODELS)
0
STEADYON=NORMALOPERATION
1
1FLASH =
2
2FLASHES=PRESSURESWITCHSTUCKCLOSED
OFF
LOW VOLTAGE(24V)
=CONTROLFAILURE
SYSTEMLOCKOUT(RETRIES/RECYCLESEXCEEDED)
3
3FLASHES=PRESSURESWITCHSTUCKOPEN
4
4FLASHES=OPENHIGHLIMIT
5
5FLASHES=FLAMESENSEWITHOUTGASVALVE
6
6FLASHES=
OPENROLLOUTOROPENFUSE
7FLASHES=LOWFLAMESIGNAL
8
8FLASHES=CHECKIGNITERORIMPROPERGROUND
C
RAPIDFLASHES=REVERSED115VACPOLARITY/VERIFYGND
PKPINK
BRBROWN
WH WHITE
BLBLUE
GYGRAY
RD RED
0140F00662 REV.A
EQUIPMENTGND
LOW VOLTAGE FIELD
HIVOLTAGE(115V)
FIELDGND
FIELDSPLICE
HIVOLTAGE FIELD
SWITCH(TEMP.)
7
COLORCODES:
YL YELLOW
OR ORANGE
PUPURPLE
GRGREEN
BKBLACK
TO115VAC/1/60HZ
POWERSUPPLYWITH
OVERCURRENTPROTECTION
DEVICE
JUNCTION
IGNITER
TERMINAL
INTERNALTO
INTEGRATEDCONTROL
PLUGCONNECTION
SWITCH(PRESS.)
OVERCURRENT
PROT.DEVICE
NOTES:
1.SETHEATANTICIPATOR ONROOMTHERMOSTATAT0.7AMPS.
2.MANUFACTURER'SSPECIFIEDREPLACEMENTPARTSMUSTBE USEDWHENSERVICING.
3.IFANYOFTHE ORIGINALWIREAS SUPPLIEDWITHTHE FURNACEMUSTBE
REPLACED,ITMUSTBE REPLACEDWITHWIRINGMATERIALHAVINGATEMPERATURE
RATINGOFATLEAST105
°C.USE COPPERCONDUCTORSONLY.
4.BLOWERSPEEDS SHOULDBEADJUSTEDBYINSTALLERTOMATCHTHEINSTALLATION
REQUIREMENTS SOAS TO PROVIDETHE CORRECTHEATINGTEMPERATURE RISEANDTHE
CORRECTCOOLINGCFM.(SEESPECSHEETFORAIRFLOWCHART)
5.UNITMUSTBE PERMANENTLY GROUNDEDANDCONFORMTON.E.C.ANDLOCALCODES.
6.TO RECALLTHE LAST5FAULTS,MOSTRECENTTOLEASTRECENT,DEPRESSSWITCH
FOR MORE THAN2SECONDSWHILE INSTANDBY(NO THERMOSTATINPUTS).
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
16
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.
CIRCULATOR
BLOWER
HI
COOL HEAT
K2
ELECTRONIC
AIR CLEANER
LO
HEAT
CIR
PARK NEU EAC
INDUCER
EAC
NEU
IND
R
K2
K3
RO2
RO1
K6
K3
ROLLOUT
SWITCH
TH
K7
K1
XFMR
HOT
24 VAC
.0005
FACTORY
JUMPER
3M
K4
K5
FACTORY
JUMPER
FP
IGN
GND
MV
FLAME
SENSOR
PROBE
MLV
PS
HLO
HLI
PSO
XFMR
NEU
TR
C
COMPRESSOR
CONTACTOR
COIL
Y
G
W
Y
G
W
R
THERMOSTAT
COM
IGNITOR
HI
PM
2-STAGE
GAS VALVE
HIGH
LIMIT
AUX
LIMIT
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.
17
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