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22. HIGH ALTITUDE INSTALLATION / DERATION
This heater not to be installed at altitude above 6,800 feet.
USA: The factory installed orifice for this appliance is approved for altitudes zero to 2000 feet above
sea level. When installed above 2000 feet, refer to information below.
When this appliance is installed above the standard altitude stipulated the input must be de-rated by 4%
for each 1000 ft above sea level. The orifice must be changed according to the chart below - confirm
the correct model. Check with your local utility regarding the gas supply and the de-rating of this appli-
ance.
MODEL
Supplied
45 DMS
RSEP1S25N (NG)
906000140 906000141 906000153 906000163 906000164 906000164
54 DMS
RSEP1S25P (LPG)
906000144 906000144 906000170 906000170 906000170 906000170
38 DMS
RSEP1S35N (NG)
906000025 906000157 906000138 906000159 906000159 906000160
50 DMS
RSEP1S35P (LPG)
906000026 906000142 906000142 906000142 906000142 906000167
31 DMS
RSEP2S50N (NG)
906000137 906000154 906000154 906000154 906000155 906000156
1
Per ANSI Z223.1 (NFPA 54)
SE+ Series Infrared Gas Heater Installation and Operation Manual
FOR USE AT ALTITUDES ABOVE (FEET)
0
> 2000
> 3000
46 DMS
2 MM
54 DMS
55 DMS
39 DMS
40 DMS
51 DMS
51 DMS
32 DMS
32 DMS
USA ORIFICE DERATION
1
Gas Orifice Drill Size
/ Part #
USA Only
> 4000
> 5000
47 DMS
48 DMS
55 DMS
55 DMS
41 DMS
41 DMS
51 DMS
51 DMS
32 DMS
33 DMS
34
> 6000
48 DMS
DO NOT
55 DMS
INSTALL AT
42 DMS
ALTITUDE ABOVE
6,800 FEET
52 DMS
34 DMS
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