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.
23
Rev. 2
* Off Heating - This fan delay timing is adjustable (60, 90, 120, 180 seconds). 90 seconds as shipped.
** On Cooling - This fan delay timing can be set at either 0 or 5 seonds. Refer to pages 31-33 for further details.
*** Off Cooling - This fan delay timing can be set at either 0 or 45 seconds. Refer to pages 31-33 for further details.
MODEL
GUIV070DX40 GUIV090DX50 GUIV115DX50 GUIV140DX50
Btuh Input (US) High Fire
69,000
92,000
115,000
138,000
Output (US) High Fire
55,200
73,600
92,000
110,400
Btuh Input (US) Low Fire
48,000
64,000
80,000
96,000
Output (US) Low Fire
38,400
51,200
64,000
76,800
A.F.U.E.
80%
80%
80%
80%
Rated External Static (WC)
.10 - .50
.10 - .50
.10 - .50
.10 - .50
Temperature Rise °F
30 - 60
35 - 65
35 - 65
45 - 75
High Pressure Switch Trip Point
-0.80
-0.74
-0.66
-0.66
Low Pressure Switch Trip Point
-0.45
-0.37
-0.37
-0.32
Blower Wheel (D x W)"
10 X 8
10 X 8
10 X 9
10 X 9
Blower Horsepower
1/2
3/4
3/4
3/4
Blower Speeds
Max CFM @ 0.5 E.S.P.
1426
1845
2059
2059
Power Supply
115-60-1
115-60-1
115-60-1
115-60-1
Min. Circuit Ampacity (MCA)
11.0
11.7
11.7
11.7
Max. Overcurrent Device
15
15
15
15
Transformer (VA)
40
40
40
40
Heat Anticipator
0.7
0.7
0.7
0.7
Limit Setting °F
230
220
190
160
Aux. Limit °F.
160
160
160
160
Fan Delay On Cooling **
0 or 5 secs.
0 or 5 secs.
0 or 5 secs.
0 or 5 secs.
Fan Delay On Heating
30 secs.
30 secs.
30 secs.
30 secs.
Off Heating *
90 secs.
90 secs.
90 secs.
90 secs.
Off Cooling ***
0 or 45 secs.
0 or 45 secs.
0 or 45 secs.
0 or 45 secs.
Gas Supply Pressure (Nat/LP)
7" / 11"
7" / 11"
7" / 11"
7" / 11"
Manifold Pressure (Nat/LP) High Stage
3.5 " / 10"
3.5 " / 10"
3.5 " / 10"
3.5 " / 10"
Manifold Pressure (Nat/LP) Low Stage
1.9" / 6.0"
1.9" / 6.0"
1.9" / 6.0"
1.9" / 6.0"
Orifice Size (Nat/LP)
#43 / #55
#43 / #55
#43 / #55
#43 / #55
Number of Burners
3
4
5
6
Vent Connector Diameter
4"
4"
4"
4"
Shipping Weight (lbs.)
152
178
194
198
Refer to notes below airflow tables on pages 31-33.
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