Iom; High Altitude Conversion; Natural To Lp Gas; Conversion Steps - Napoleon WSX-EN Series Installation And Operating Instructions Manual

13.0 CONVERSIONS
13.1

HIGH ALTITUDE CONVERSION

In Canada, this furnace does not need to be converted for high altitude (2000-4500ft), when the fuel source is
natural gas. It has been certifi ed to operate at high altitude as manufactured. Between 2000ft and 4500ft when
the fuel source is LP, a 10% reduction of input capacity is necessary.
In the United States, this furnace does not need to be converted for high altitude from (2000-7800ft), when
the fuel source is natural gas. It has been certifi ed to operate at high altitude as manufactured up to 7800ft
only. Beyond 7800ft the modifi cations are based on a 4% reduction of input capacity for every 1000ft above
sea level. If the fuel source is liquid propane, refer to High Altitude Specifi cations table for appropriate derate
above 2000ft based on a 4% reduction of input capacity for every 1000ft above sea level. Consult with local
fuel suppliers or authorities to determine local regulations or customs.
FIGURE 24 - INSHOT BURNER ASSEMBLY
13.2

NATURAL TO LP GAS

This series furnace is manufactured as a natural gas appliance that may be converted to LP gas through use of
the Conversion Kit part number W370-0018. This kit contains the conversion kit instructions, orifi ces needed
for all models, the regulator spring for the gas valve, and a label to affi x adjacent to the appliance rating plate to
alert subsequent service technicians of the conversion. The parts removed for this conversion must remain
with the furnace for any future conversion back to natural gas.
When converting for LP operation the installation of a low pressure cut off switch is required, which is included in
the LP Conversion Kit (Part No. W370-0018).
13.3

CONVERSION STEPS

Refer to Conversion NG to LP Kit (W370-0018) for complete instruction.
TABLE 6 - HIGH ALTITUDE GUIDE (U.S. ONLY) (WSX)
MODEL ALTITUDE
0-2000 (0-610 m)
2000-3000 (610-914 m)
3000-4000 (914-1219 m)
4000-5000 (1219-1524 m)
5000-6000 (1524-1829 m)
40/60/
80
6000-7000 (1829-2134 m)
7000-7800 (2134-2377 m)
7800-8000 (2377-2438 m)
8000-9000 (2438-2743 m)
9000-10000 (2743-3048 m)
Gas input ratings are certifi ed for elevations to 7800 ft (2377 m) on
natural gas. For elevations above 7800 ft (2377 m) on natural gas, or LP
fuel source above 2000ft (610m), follow the orifi ce de-rate chart above.
H18.1.4A
ORIFICE SIZES (DMS)
NATURAL LP
55
45
56
53 62
54 63
55 65
H12.8.8A
H18.2B
H18.3
W415-2845 / B / 11.10.20
37

IOM