Technical information

FURNACE SPECIFICATIONS
13
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, steady state efficiency times output.
4. Minimum Circuit Ampacity calculated as: (1.25 x Circulator Blower Amps) + I.D. Blower Amps.
Model
GCCA045BX30 GCCA070BX30 GCCA070BX40 GCCA090BX40 GCCA090BX50 GCCA115BX50
Btuh
Input (US) 46,000 69,000 69,000 92,000 92,000 115,000
Output (US) 43,000 65,400 63,300 87,500 86,200 109,100
Input (CAN) 46,000 69,000 69,000 92,000 92,000 115,000
Output (CAN) 43,000 65,400 63,300 87,500 86,200 109,100
A.F.U.E. 92.1% 92.1% 92.1% 92.1% 92.1% 92.1%
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 40 - 70 35 - 65 40 - 70
ID Blower Pressure Switch Trip Point (" w.c.) -0.37 -0.37 -0.37 -0.37 -0.37 -0.37
Front Cover Pressure Switch Trip Point (" w.c.) -0.37 -0.37 -0.37 -0.37 -0.37 -0.37
Blower Wheel (D" x W") 11 x 6 11 x 7 11 x 9 11 x 9 11 x 9 11 x 10
Blower Horsepower 1/3 1/2 1/2 1/2 3/4 1/2
Blower Speeds 4 4 4 4 4 4
Max CFM @ 0.5 E.S.P. 1195 1324 1590 1581 1891 1849
Power Supply 115-60-1 115-60-1 115-60-1 115-60-1 115-60-1 115-60-1
Minimum Circuit Ampacity (MCA) 9.0 9.8 8.9 8.9 12.2 10.9
Maximum Overcurrent Device 15.0 15.0 15.0 15.0 15.0 15.0
Transformer (VA) 40 40 40 40 40 40
Heat Anticipator (Amps) 0.7 0.7 0.7 0.7 0.7 0.7
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 secs. 30 secs. 30 secs. 30 secs. 30 secs. 30 secs.
Off Heating * 90 secs. 90 secs. 90 secs. 90 secs. 90 secs. 90 secs.
Fan Delay On Cooling 5 sec. 5 sec. 5 sec. 5 sec. 5 sec. 5 sec.
Off Cooling 45 secs. 45 secs. 45 secs. 45 secs. 45 secs. 45 secs.
Gas Supply Pressure (Natural/Propane) ("w.c.) 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
Orifice Size (Natural/Propane) #43 / #55 #43 / #55 #43 / #55 #43 / #55 #43 / #55 #43 / #55
Number of Burners 233445
Vent Connector Diameter (inches) 2 2 2 2 2 2
Combustion Air Connector Diameter (inches) 2 2 2 2 2 2
Shipping Weight (lbs.) 132 145 153 167 176 188
* Off Heating - This fan delay timing is adjustable (60, 90, 120 or 180 seconds), 90 seconds as shipped.