FURNACE SPECIFICATIONS
13
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.
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.
*Off Heating - This fan delay timing is adjustable (90, 120, 150 or 180 seconds). 150 seconds as shipped.
AMH8***A*
MODEL
AM
H
8040
3A
*A
*
AM
H
8060
3A
*A
*
AM
H
806
04B
*A
*
AM
H
808
03B
*A
*
AM
H
808
04B
*A
*
AM
H
8
0
8
05C
*A
*
AM
H
8
1
0
05C
*A
*
AM
H
8
12
05D
*A
*
Input, Natural Gas (BTUH)
45, 000
70,000
70,000
90,000
90,000
90,000
115,000
140,000
Output, Natural Gas (BTUH)
1
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%
Rated External Static (" w.c.)
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
Tem perature Rise (°F)
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
Blower Horsepower
1/3
1/3
1/2
1/3
1/2
1/2
1/2
3/4
Blower Speeds
4
4
4
4
4
4
4
4
Max CFM @ 0.5 E.S.P.
1298
1157
1883
1448
1725
1960
1974
2131
Power Supply (Volts/Hz/Ph)
115/60/1
115/60/1
115/60/1
115/60/1
115/60/1
115/60/1
115/60/1
115/60/1
Minimum Circuit Ampacity (MCA)
2
8.1
8.1
12.5
8.1
12.5
12.5
12.5
14.7
Maximum Overcurrent Device
3
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
170
180
160
Auxiliary Limit Setting (°F)
120
120
120
120
120
120
120
120
Rollout Lim it Setting (°F)
300
300
300
300
300
300
300
300
Fan Delay On Heating
30
30
30
30
30
30
30
30
Off Heating *
150
150
150
150
150
150
150
150
Fan Delay On Cooling
6
6
6
6
6
6
6
6
Off Cooling
45
45
45
45
45
45
45
45
Fan Delay On - Fan Only
0
0
0
0
0
0
0
0
Gas Supply Pressure
(Natural/Propane) (" w.c.)
7 / 11
7 / 11
7 / 11
7 / 11
7 / 11
7 / 11
7 / 11
7 / 11
Manifold Pressure
(Natural/Propane) (" w.c.)
3.5 / 10
3.5 / 10
3.5 / 10
3.5 / 10
3.5 / 10
3.5 / 10
3.5 / 10
3.5 / 10
Orifice Size (Natural/Propane)
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
