Conversions; High Altitude Conversion; Natural To Lp Gas Conversion; Conversion Steps - Napoleon 9700 B series Installation And Operating Instructions Manual

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13.0

CONVERSIONS

13.1 HIGH ALTITUDE CONVERSION

In Canada, this funace does not need to be converted for high altitude (2000-4500ft), when the fuel source
IOM
IOM
is natural gas. It has been certifi ed to operate at high altitude as manufactured. 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.
In the United States, this furnace does not need to be converted for high altitude from (2000-5400ft), when
the fuel source is natural gas. It has been certifi ed to operate at high altitude as manufactured up to 5400ft
only. Beyond 5400ft 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.

13.2 NATURAL TO LP GAS CONVERSION

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.

13.3 CONVERSION STEPS

Refer to Conversion NG to LP Kit (W370-0018) for complete instruction.

13.4 CHECKING THE INLET GAS PRESSURE

WHITE-RODGERS 36G54 TWO STAGE GAS VALVE
1. Turn off the gas and electrical supply to the furnace.
2. Back inlet pressure test screw (inlet pressure boss, see FIGURE 31) counterclockwise out one turn
maximum, with a 3/32" Allen wrench. Attach a hose and calibrated U-tube or digital manometer to the inlet
pressure boss. Hose should overlap boss 3/8". The manometer must have a scale range of at least 0" to
15" of water column.
3. Turn ON the gas and electrical supply and operate the furnace and all other gas consuming appliances on
the same gas supply line. Using a leak detection solution, check for leaks around the gas valve/manifold
connection and the burner orifi ces. Repair any leaks before continuing.
4. Measure furnace gas inlet pressure with burners fi ring. Inlet pressure must be within the range specifi ed
on the furnace rating plate. 5-7" w.c. (Natural Gas) or 11-13" w.c. (LP).
If the inlet pressure differs from the rating plate, make the necessary adjustments to pressure regulator,
gas piping size, etc. and/or consult with local gas utility.
W415-1243 / A / 03.19.15
TABLE 6 - HIGH ALTITUDE SPECIFICATIONS
ORIFICE SIZE (DMS)
Input
ALTITUDE
K/Btu/hr
NATURAL
0-2000 (0-610 m)
2000-3000 (610-914 m)
3000-4000 (914-1219 m)
4000-5000 (1219-1524 m)
5000-5400 (1524-1646 m)
40/60/80
100/120
5400-6000 (1646-1829 m)
6000-7000 (1829-2134 m)
7000-8000 (2134-2438 m)
8000-9000 (2438-2743 m)
9000-10000 (2743-3048 m)
Gas input ratings are certifi ed for elevations to 5400 ft. (1646 m) on natural gas. For elevations above 5400 ft. (1646 m) on natural gas, or
LP fuel source above 2000 ft. (610 m), follow orifi ce derate chart above.
Input
ALTITUDE
K/Btu/hr
LP GAS
0-2000 (0-610 m)
55
2000-3000 (610-914 m)
56
3000-4000 (914-1219 m)
45 57
4000-5000 (1219-1524 m)
58
5000-5400 (1524-1646 m)
59
30
5400-6000 (1646-1829 m)
51 60
6000-7000 (1829-2134 m)
52 61
7000-8000 (2134-2438 m)
53 62
8000-9000 (2438-2743 m)
54 63
55 65
9000-10000 (2743-3048 m)
H18.1B
ORIFICE SIZE (DMS)
NATURAL LP GAS
57
58
59
50
60
61
62
56
57 63
58 64
59 65
60 67
H12.8.1A
H18.2A
H18.3