Large Unit Heater
13
Operating Instructions and Owner’s Manual
In case the manifold pressure is changed for this reason, the altitude label in the conversion kit must be completed and affixed to the unit:
TABLE 7: Natural Gas Heating Values at Altitude
TABLE 8: Propane Gas Heating Values at Altitude
Model
Altitude 0-2000 ft. (0-610m)
Altitude 2000-3000 ft. (610-910mm)
Manifold Pressure
Input Rating
Manifold Pressure
Input Rating
[“ W.C.]
[kPa]
[BTU/Hr]
[W]
[“ W.C.]
[kPa]
[BTU/Hr]
[W]
HSU200NG
4.5
1.12
200,000
58,614
4.15
1.03
192,000
56,269
HSU250NG
4.9
1.22
250,000
73,268
4.52
1.12
240,000
70,337
HSU300NG
1.73
0.43
300,000
87,921
1.59
0.40
288,000
84,404
HSU400NG
2.13
0.53
400,000
117,228
1.96
0.49
384,000
112,539
Model
Altitude 0-2000 ft. (0-610m)
Altitude 2000-3000 ft. (610-910mm)
Manifold Pressure
Input Rating
Manifold Pressure
Input Rating
[“ W.C.]
[kPa]
[BTU/Hr]
[W]
[“ W.C.]
[kPa]
[BTU/Hr]
[W]
HSU200NG
7.23
1.8
200,000
58,614
6.66
1.66
192,000
56,269
HSU250NG
7.23
1.8
250,000
73,268
6.66
1.66
240,000
70,337
HSU300NG
3.81
0.95
300,000
87,921
3.51
0.88
288,000
84,404
HSU400NG
4.74
1.18
400,000
117,228
4.37
1.09
384,000
112,539
Model
Altitude 3000-4000 ft. (910-1220m)
Altitude 4000-4500 ft. (1220-1350mm)
Manifold Pressure
Input Rating
Manifold Pressure
Input Rating
[“ W.C.]
[kPa]
[BTU/Hr]
[W]
[“ W.C.]
[kPa]
[BTU/Hr]
[W]
HSU200NG
3.81
0.95
184,000
53,925
3.65
0.91
180,000
52,753
HSU250NG
4.15
1.03
230,000
67,407
3.97
0.99
225,000
65,941
HSU300NG
1.46
0.36
276,000
80,887
1.40
0.35
270,000
79,129
HSU400NG
1.80
0.45
368,000
107,850
1.73
0.43
360,000
105,505
Model
Altitude 3000-4000 ft. (910-1220m)
Altitude 4000-4500 ft. (1220-1350mm)
Manifold Pressure
Input Rating
Manifold Pressure
Input Rating
[“ W.C.]
[kPa]
[BTU/Hr]
[W]
[“ W.C.]
[kPa]
[BTU/Hr]
[W]
HSU200NG
6.12
1.52
184,000
53,925
5.86
1.46
180,000
52,753
HSU250NG
6.12
1.52
230,000
67,407
5.86
1.46
225,000
65,941
HSU300NG
3.22
0.80
276,000
80,887
3.09
0.77
270,000
79,129
HSU400NG
4.01
1.00
368,000
107,850
3.84
0.96
360,000
105,505
This appliance was converted on ______ (day-month-year)
for operation at ____ ft.(___m) altitude by ____________
(name and address of the organization making this conver-
sion) which accepts the responsiblity that this conversion
has been properly made.
Manifold pressure adjustment____W.C. Input rating____
Btu/hr
HIGH ALTITUDE OPERATION
WARNING
Explosion hazard. This heater must be converted by a trained gas installation and service personnel only. Failure to
comply could result in personal injury, asphyxiation, death, and fire or property damage.
This Unit heater is factory configured for altitudes from 0 – 2,000 ft above sea level. Above 2000 ft. (610m), manifold pressure must be adjusted
according to the following tables:
