FURNACE SPECIFICATIONS
12 Rev. 1
1. These furnaces are manufactured for natural gas operation. Optional kits are available for conversion to propane
gas 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 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
GCIC045CX30 GCIC070CX30 GCIC070CX40 GCIC090CX30 GCIC090CX50 GCIC115CX40 GCIC115CX50 GCIC140CX50
Btuh Input (US) 46,000 69,000 69,000 92,000 92,000 115,000 115,000 140,000
Output (US) 36,800 55,200 55,200 73,600 73,600 92,000 92,000 110,400
A.F.U.E. 80% 80% 80% 80% 80% 80% 80% 80%
Rated External Static (" w.c.) .10 - .50 .12 - .50 .12 - .50 .15 - .50 .15 - .50 .20 - .50 .20 - .50 .20 - .50
Temperature Rise (°F) 35 - 65 45 - 75 45 - 75 45 - 75 45 - 75 45 - 75 45 - 75 45 - 75
Pressure Switch Trip Point (" w.c.) -0.55 -0.55 -0.55 -0.55 -0.55 -0.55 -0.55 -0.55
Blower Wheel (D" x W") 9 x 8 9 x 8 10 x 6 10 X 8 10 x 8 10 x 7 10 x 9 10 x 9
Blower Horsepower 1/3 1/3 1/2 1/3 1/2 1/2 3/4 3/4
Blower Speeds 44444444
Max CFM @ 0.5 E.S.P. 1160 1150 1370 1270 1780 1660 1840 1850
Power Supply 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) 8.6 9.0 10.4 8.2 14.4 12.7 14.1 14.1
Maximum Overcurrent Device 15 15 15 15 15 15 15 15
Transformer (VA) 40 40 40 40 40 40 40 40
Heat Anticipator 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7
Primary Limit Setting (°F) 240 200 170 170 160 *130 130 140
Auxiliary Limit Setting (°F) 160 160 160 160 160 160 160 160
Rollout Limit Setting (°F) 250 275 275 325 325 275 275 275
Fan Delay On 30 secs. 30 secs. 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. 90 secs. 90 secs.
Off Cooling 45 secs. 45 secs. 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 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 23344556
Vent Connector Diameter (inches) 33333333
Shipping Weight (lbs.) 140 151 152 169 178 190 194 198
* Off Heating - This fan delay timing is adjustable (60, 90, 120 or 180 seconds), 90 seconds as shipped.
*130 = The GUIC115**40 furnaces were changed from primary limit part #10728327 (120°F) to limit part #10728329 (130°F) per ECN60643 effective April 7, 1999.
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