Trane GHND-SVX01A-EN - Manual (Page 32)

32 High Efficiency Propeller Fan Gas Unit Heater •
GHND-SVX01A-EN
Operation
Notes: This schedule is for units operating at normal altitudes of 2000 ft. (610m) or less. SPECIAL ORIFICES ARE
REQUIRED FOR INSTALLATIONS ABOVE 2,000 FT. (610M).
Notes: When installed in Canada, any references to deration at altitudes in excess of 2000 feet (610m) are to be
ignored. At altitudes of 2000 to 4500 feet (610 to 1372m), the unit heaters must be orificed to 90% of
the normal altitude rating, and be so marked in accordance with the CSA certification.
Table 6. Main burner orifice schedule
Input in 1000 BTU
Type of Gas Natural Propane
Number of
Burner
Orifices
Heating Value
1075 BTU/Ft3
(40.1 MJ/m3) 2500 BTU/Ft3
(93.1 MJ/m3)
Manifold Pressure
3.5" W.C.
(0.87kPA) 10" W.C.
(2.49 kPA)
30 FT 3/HR
ORIFICE DRILL 28
49 12
57 2
45 FT 3/HR
ORIFICE DRILL 42
49 16
57 3
60 FT 3/HR
ORIFICE DRILL 56
49 24
57 4
75 FT 3/HR
ORIFICE DRILL 70
49 30
57 5
100 FT 3/HR
ORIFICE DRILL 96
42 40
54 4
125 FT 3/HR
ORIFICE DRILL 120
42 50
54 5
150 FT 3/HR
ORIFICE DRILL 140
42 60
54 6
175 FT 3/HR
ORIFICE DRILL 163
42 70
54 7
200 FT 3/HR
ORIFICE DRILL 186
42 80
54 8
225 FT 3/HR
ORIFICE DRILL 210
42 90
54 9
250 FT 3/HR
ORIFICE DRILL 233
42 100
54 10
300 FT 3/HR
ORIFICE DRILL 280
42 120
54 12
350 FT 3/HR
ORIFICE DRILL 326
42 140
54 14
400 FT 3/HR
ORIFICE DRILL 372
42 160
54 16