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MODEL
Btuh
Input (US)
Output (US)
Input (CAN)
Output (CAN)
A.F.U.E.
Rated External Static (WC)
Temperature Rise °F
ID Blower Pressure Switch Trip Point
Front Cover Pressure Switch Trip Point
Blower Wheel (D x W)"
Blower Horsepower
Blower Speeds
Max CFM @ 0.5 E.S.P.
Power Supply
Min. Circuit Ampacity (MCA)
Max. Overcurrent Device
Transformer (VA)
Heat Anticipator
Limit Setting °F
Aux. Limit °F.
Fan Delay Timings
On Heating
Off Heating *
On Cooling
Off Cooling
Gas Supply Pressure (Nat/LP)
Manifold Pressure (Nat/LP)
Orifice Size (Nat/LP)
Number of Burners
Vent Connector Diameter
Combustion Air Connector Diameter
Shipping Weight (lbs.)
* Off Heating - This fan delay timing is adjustable (60, 90, 120 or 180 seconds). 90 seconds as shipped.
1. These furnaces are manufactured for natural gas operation. Optional LP Conversion Kits are available to convert
to propane gas.
2. When these furnaces are installed at high altitude, the appropriate High Altitude orifice kit must be applied. This is
required due to the natural reduction in the density of both the gas fuel and combustion air as altitude increases. The
kit will provide the proper design certified input rate within the specified altitude range.
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 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 Circulation Blower Amps) + I.D. Blower Amps.
14
Rev. 0
FURNACE SPECIFICATIONS
GUCA045AX30 GUCA070AX30 GUCA070AX40 GUCA090AX40 GUCA090AX50 GUCA115AX50
46,000
69,000
42,800
64,400
46,000
69,000
42,800
64,400
92.0%
92.0%
.20 - .50
.20 - .50
35 - 65
35 - 65
-0.37
-0.37
-0.37
-0.37
11 x 6
11 x 7
1/3
1/2
4
4
1196
1406
115-60-1
115-60-1
9.0
8.9
15.0
15.0
40
40
0.7
0.7
150
150
150
150
30 secs.
30 secs.
90 secs.
90 secs.
5 sec.
5 sec.
45 secs.
45 secs.
7" / 11"
7" / 11"
3.5 " / 10"
3.5 " / 10"
#43 / #55
#43 / #55
2
3
2"
2"
2"
2"
131
144
69,000
92,000
64,400
86,000
69,000
92,000
64,400
86,000
92.0%
92.0%
.20 - .50
.20 - .50
35 - 65
35 - 65
-0.37
-0.37
-0.37
-0.37
11 x 9
11 x 9
1/2
1/2
4
4
1643
1544
115-60-1
115-60-1
8.9
8.9
15.0
15.0
40
40
0.7
0.7
160
150
150
150
30 secs.
30 secs.
90 secs.
90 secs.
5 sec.
5 sec.
45 secs.
45 secs.
7" / 11"
7" / 11"
3.5 " / 10"
3.5 " / 10"
#43 / #55
#43 / #55
3
4
2"
2"
2"
2"
152
166
92,000
115,000
85,300
106,500
90,000
115,000
85,300
106,500
92.0%
92.0%
.20 - .50
.20 - .50
35 - 65
35 - 65
-0.37
-0.37
-0.37
-0.37
11 x 9
11 x 10
3/4
3/4
4
4
2128
2029
115-60-1
115-60-1
13.8
14.9
15.0
15.0
40
40
0.7
0.7
150
150
150
160
30 secs.
30 secs.
90 secs.
90 secs.
5 sec.
5 sec.
45 secs.
45 secs.
7" / 11"
7" / 11"
3.5 " / 10"
3.5 " / 10"
#43 / #55
#43 / #55
4
5
2"
2"
2"
2"
175
187
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