FURNACE SPECIFICATIONS
12
NOTES:
*
These furnaces are manufactured for natural gas operation. Optional Kits are available for conversion to propane gas operation.
*
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 DOE AFUE based upon Isolated Combustion System (I CS)
4 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.
• G as Service Connect ion ½” FPT
• Important : Size fuses and wires properly and make electrical connections in ac cordance wit h t he National Elect rical Code and/ or all exis ting local codes.
2 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 USA) and the Canada National Standard of Canada, CAN/CSA B149. 1
and CAN/CSA B142.2 (in Ca
3 Minimum Circuit Ampacity = (1.25 x Circulator Blower Amps) + I D Blower amps. Wire size should be det ermined in accordance with National Elect rical Codes.
Ext ens ive wire runs will require larger wire sizes.
GDH8***B*
MODEL
GDH80403 A*B*
GDH80603A*B*
GDH80804B*B*
GDH81005C*B*
Btuh Input (US) High Fire
40,000
60,000
80,000
100,000
Output (US) High F ire
32,000
48,000
64,000
80,000
A.F.U.E.
(1)
80%
80%
80%
80%
Rated External Static (" w.c.)
.20 - .50
.20 - .50
.20 - .50
.20 - .50
T emperature Rise (°F)
25-55
30-60
35-65
40-70
Pressure Switch Trip Point (" w.c.)
-0.60
-0.60
-0.60
-0.80
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)
(3)
8.5
8.5
12.9
12.9
Maximum Overcurrent Device
(4)
15
15
15
15
T ransformer (VA)
40
40
40
40
Heat Anticipator (Amps)
0.7
0.7
0.7
0.7
Primary Limit Setting (°F)
180
180
180
210
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)
#45 / #55
#45 / #55
#45 / #55
#45 / #55
Number of Burners
2
3
4
5
Vent Connector Diameter (inches)
(2)
4
4
4
4
Shipping Weight (lbs.)
88
92
106
114