FURNACE SPECIFICATIONS
1. These furnaces are manufactured for natural gas operation. Optional LP Conversion Kits are available to convert to
propane gas.
2. 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.
3. The total heat loss from the structure as expressed in TOTAL BTU/HR must be calculated by the manufactures method
of in accordance with the "A.S.H.R.A.E. GUIDE" or "MANUAL J-LOAD CALCULATIONS" published by the AIR CON-
DITIONING 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.
24
Rev. 2
* Off Heating - This fan delay timing is adjustable (60, 90, 120, 180 seconds). 90 seconds as shipped.
MODEL
GCIA045A30
GCIA045CA30
GCIA045CX30
GCIA070A30
GCIA070CA30
GCIA070CX30
GCIA070A40
GCIA070CA30
GCIA070CX30
GCIA090A30
GCIA090CA30
GCIA090CX30
GCIA090A50
GCIA090CA50
GCIA090CX50
GCIA115A40
GCIA115CA40
GCIA115CX40
GCIA115A50
GCIA115CA50
GCIA115CX50
GCIA140A50
GCIA115CA50
GCIA115CX50
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 (WC)
.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
-1.70
-1.42
-1.42
-1.20
-1.20
-1.15
-1.15
-1.05
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
1/2
1/2
1/2
3/4
3/4
Blower Speeds
4
4
4
4
4
4
4
4
Max CFM @ 0.5 E.S.P.
1160
1145
1366
1265
1780
1660
1840
1845
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
Min. Circuit Ampacity (MCA)
9.5
9.3
10.7
8.6
14.7
13.1
14.5
14.5
Max. 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
Limit Setting °F
240
200
170
170
160
130
130
140
Aux. Limit °F.
160
160
160
160
160
160
160
160
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 (Nat/LP)
7" / 11"
7" / 11"
7" / 11"
7" / 11"
7" / 11"
7" / 11"
7" / 11"
7" / 11"
Manifold Pressure (Nat/LP)
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 (Nat/LP)
#43 / #55
#43 / #55
#43 / #55
#43 / #55
#43 / #55
#43 / #55
#43 / #55
#43 / #55
Number of Burners
2
3
3
4
4
5
5
6
Vent Connector Diameter
3"
3"
3"
3"
3"
3"
3"
3"
Shipping Weight (lbs.)
140
151
152
169
178
190
194
198
