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MODEL
Btuh Input (US) High Fire
Output (US) High Fire
Btuh Input (US) Low Fire
Output (US) Low Fire
A.F.U.E.
Rated External Static (WC)
Temperature Rise °F
High Pressure Switch Trip Point
Low 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 On
Off Heating *
Off Cooling
Gas Supply Pressure (Nat/LP)
Manifold Pressure (Nat/LP) High Stage
Manifold Pressure (Nat/LP) Low Stage
Orifice Size (Nat/LP)
Number of Burners
Vent Connector Diameter
Shipping Weight (lbs.)
* Off Heating - This fan delay timing is adjustable (60, 90, 120, 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. 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.
22
Rev. 2
FURNACE SPECIFICATIONS
GUIS070CA35
GUIS090CA50
GUIS090CA30
GUIS070CX35
GUIS090CX50
GUIS090DA30
GUIS070DA35
GUIS090DA50
GUIS090DX30
GUIS070DX35
GUIS090DX50
69,000
92,000
92,000
55,200
73,600
73,600
48,000
64,000
64,000
38,400
51,200
51,200
80%
80%
80%
.12 - .50
.15 - .50
.15 - .50
30 - 60
35 - 65
35 - 65
-0.80
-0.74
-0.74
-0.45
-0.37
-0.37
10 X 6
10 X 8
10 X 8
1/2
1/2
1/2
4
4
1450
1380
1975
115-60-1
115-60-1
115-60-1
10.9
8.0
14.8
15
15
15
40
40
40
0.7
0.7
0.7
230
220
170
160
160
160
30 secs.
30 secs.
30 secs.
90 secs.
90 secs.
90 secs.
45 secs.
45 secs.
45 secs.
7" / 11"
7" / 11"
7" / 11"
3.5 " / 10"
3.5 " / 10"
3.5 " / 10"
1.9" / 6.0"
1.9" / 6.0"
1.9" / 6.0"
#43 / #55
#43 / #55
#43 / #55
3
4
4"
4"
4"
152
169
178
GUIS115CA50
GUIS140CA50
GUIS115DA50
GUIS140DA50
GUIS115DX50
115,000
138,000
92,000
110,400
80,000
96,000
64,000
76,800
80%
80%
.20 - .50
.20 - .50
35 - 65
45 - 75
-0.66
-0.66
-0.37
-0.32
10 X 9
10 X 9
3/4
3/4
4
4
4
1985
2050
115-60-1
115-60-1
13.3
14.3
15
15
40
40
0.7
0.7
190
160
160
160
30 secs.
30 secs.
90 secs.
90 secs.
45 secs.
45 secs.
7" / 11"
7" / 11"
3.5 " / 10"
3.5 " / 10"
1.9" / 6.0"
1.9" / 6.0"
#43 / #55
#43 / #55
4
5
6
4"
4"
194
198
GCIS070CX35
GCIS090CX50
GCIS070DX35
GCIS090DX50
69,000
92,000
55,200
73,600
48,000
64,000
38,400
51,200
80%
80%
.12 - .50
.15 - .50
35 - 65
45 - 75
-0.55
-0.55
-0.27
-0.27
10 X 6
10 X 8
1/2
3/4
4
4
1366
1780
115-60-1
115-60-1
10.2
14.2
15
15
40
40
0.7
0.7
190
160
160
160
30 secs.
30 secs.
90 secs.
90 secs.
45 secs.
45 secs.
7" / 11"
7" / 11"
3.5 " / 10"
3.5 " / 10"
1.9" / 6.0"
1.9" / 6.0"
#43 / #55
#43 / #55
3
4
3"
3"
152
178
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