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FURNACE SPECIFICATIONS
12
1. These furnaces are manufactured for natural gas operation. Optional kits are available for conversion to propane operation.
2. 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.
3. 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.
4. Minimum Circuit Ampacity calculated as: (1.25 x Circulator Blower Amps) + I.D. Blower Amps.
Unit specifications are subject to change without notice.
ALWAYS refer to the units serial plate for the most up-to-date general and electrical information.
(1)
Wire size should be determined in accordance with National Electrical Codes. Extensive wire runs will require larger wire sizes.
(2)
Maximum Overcurrent Protection Device: May use Time Delay Fuse or HACR type Circuit Breaker of the same size as noted.
(3)
Off Heating - this fan delay timing is adjustable (100 or 150 seconds), 150 seconds as shipped.
(4)
See Installation Instructions for appropriate vent diameter, length and number of elbows.
NOTE: This data is provided as a guide, it is important to electrically connect the unit and properly size fuses/circuit breakers and wires in
accordance with all national and/or local electrical codes. Use copper wire only.
GCH9
MODEL GCH90453BX GCH90703BX GCH90704BX GCH90904CX GCH90905CX GCH91155DX
Btuh Input (US) 46,000 69,000 69,000 92,000 92,000 115,000
Output (US) 42,800 64,400 64,400 86,000 86,000 106,500
BTUH Output (US) LP 38,502 57,753 57,753 77,004 77,004 96,255
A.F.U.E. 93 93 93 93 93 93
Rated External Static (" w.c.) .20" - .50" .20" - .50" .20" - .50" .20" - .50" .20" - .50" .20" - .50"
Temperature Rise (°F) 35-65 35-65 35-65 35-65 35-65 35-65
Pressure Switch Trip Point (" w.c.) -0.60 -0.60 -0.37 -0.60 -0.37 -0.60
Front Cover Pressure Switch Trip Point (" w.c) -0.60 -0.60 -0.37 -0.60 -0.37 -0.60
Blower Wheel (D" x W") 10 X 8 10 X 8 10 X 10 10 X 10 11 X 10 11 x 10
Blower Horsepower 1/3 1/3 1/2 1/2 3/4 3/4
Blower Speeds 4 4 4 4 4 4
Max CFM @ 0.5 E.S.P. 1,200 1,200 1,600 1600 2000 2000
Power Supply 115-60-1 115-60-1 115-60-1 115-60-1 115-60-1 115-60-1
Minimum Circuit Ampacity (MCA)
(1)
9.40 9.40 13.80 13.80 13.20 13.20
Maximum Overcurrent Device
(2)
15 15 15 15 15 15
Transformer (VA) 40 40 40 40 40 40
Primary Limit Setting (°F) 170 170 170 150 170 155
Auxiliary Limit Setting (°F) 160 160 170 160 170 160
Rollout Limit Setting (°F) 210 210 210 220 220 210
Fan Delay On Heating 30 30 30 30 30 30
Off Heating
(3)
150 150 150 150 150 150
Fan Delay On Cooling 5 5 5 5 5 5
Off Cooling 45 45 45 45 45 45
Fan Delay On - Fan Only 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
Manifold Pressure (Natural/Propane) 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
Number of Burners 2 3 3 4 4 5
Vent Connector Diameter (inches)
(4)
222222
Shipping Weight (lbs.) 132 135 136 158 172 178