FURNACE SPECIFICATIONS
11
NOTES:
*
These furnaces are manufactured for natural gas operation. Optional Kits are available for conversion to propane gas operation.
*
For elevations above 2000 ft. the rating should be reduced by 4% for each 1000 ft. above sea level. The furnace must not be derated, orifice changes should only
be made if necessary for altitude.
*
The total heat loss from the structure as expressed in TOTAL BTU/HR must be calculated by the manufactures method 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.
Unit specifications are subject to change without notice.
ALWAYS
refer to the unit's serial plate for the most up-to-date general and electrical information.
1 Natural Gas BTU/h. For altitudes above 2,000’, reduce input rating 4% f or each 1,000’ above sea level.
2 DOE AFUE based upon Isolated Combustion S ystem (I CS)
5 Maximum Overcurrent Protection Device refers to maximum recommended fuse or circ uit breaker size. May use fuses or HACR-type circuit breakers of the same s ize as noted.
Notes:
• All furnaces are manufactured f or use on 115 VAC, 60 Hz, single-phase elect rical supply.
• Gas Service Connection ½” FP T
• I mportant: Size fuses and wires properly and make electrical connections in ac cordance wit h t he National Electrical Code and/ or all exis ting local codes.
3 Vent and combustion air diameters may vary depending upon vent length.
Ref er to the latest editions of the National Fuel Gas Code NFPA 54/ ANSI Z223.1 (in the US A) and the Canada National Standard of Canada, CAN/CSA B149. 1
and CA N/CSA B142. 2 (in Ca
4 Minimum Circuit Ampacity = (1.25 x Circulat or Blower Amps) + I D Blower amps. Wire size should be determined in accordance with National Elect rical Codes.
Extens ive wire runs will require larger wire sizes.
GDH8***A*
MODEL
GDH80403A*A*
GDH80603A***
GDH80804B*A*
GDH81005C*A*
Btuh Input (US) High Fire
(1)
45,000
70,000
90,000
115,000
Output (US) High Fire
36,000
56,000
72,000
92,000
A.F.U.E.
(2)
80%
80%
80%
80%
Rated External Static (" w.c.)
.20 - .50
.20 - .50
.20 - .50
.20 - .50
Temperature Rise (°F)
35-65
30-60
35-65
40-70
Pressure Switch Trip Point (" w.c.)
-0.60
-0.70
-0.60
-0.70
Blower Wheel (D" x W")
10 X 6
10 X 6
10 X 8
10 X 10
Blower Horsepower
1/3
1/3
1/2
3/4
Blower Speeds
4
4
4
4
Available AC @ 0.5” ESP
3
3
4
5
Power Supply
115-60-1
115-60-1
115-60-1
115-60-1
Minimum Circuit Ampacity (MCA)
(4)
8.5
8.5
12.9
12.9
Maximum Overcurrent Device
(5)
15
15
15
15
Transformer (VA)
40
40
40
40
Heat Anticipator (Amps)
0.7
0.7
0.7
0.7
Primary Limit Setting (°F)
220
220
180
180
Auxiliary Limit Setting (°F)
120
120
120
120
Rollout Limit Setting (°F)
300
300
300
300
Gas Supply Pressure (Natural/Propane) (" w.c.)
7 / 11
7 / 11
7 / 11
7 / 11
Manifold Pressure (Natural/Propane) High Stage (" w.c.)
3.5 / 10
3.5 / 10
3.5 /10
3.5 /10
Orifice Size (Natural/Propane)
#43 / #55
#43 / #55
#43 / #55
#43 / #55
Number of Burners
2
3
4
5
Vent Connector Diameter (inches)
(3)
4
4
4
4
Shipping Weight (lbs.)
88
92
106
114