Conversions; High Altitude Conversion; Conversion Steps; Checking The Inlet Gas Pressure - Napoleon 9500 series Installation And Operating Instructions Manual

13.0

CONVERSIONS

13.1 HIGH ALTITUDE CONVERSION

In Canada, the modifi cations for high altitude are
based on a 10% reduction of input capacity for
elevations from 2000 - 4500 feet (610m - 1372m).
In the United States, the modifi cations for high
altitude are based on a 4% reduction of input capacity
for every 1000 feet (305m) above 2000 feet (610m)
above sea level. Table 6 illustrates the impact of
altitude for selected elevations. Consult with local fuel
suppliers or authorities to determine local regulations
or customs.
TABLE 6 - HIGH ALTITUDE SPECIFICATIONS (U.S.A.)
Input
K/Btu/hr
0-2000 (0-610 m)
2000-3000 (610-914 m)
3000-4000 (914-1219 m)
4000-5000 (1219-1524 m)
60/80
5000-6000 (1524-1829 m)
100/120
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 2000 ft. For elevations
above 2000 ft, reduce ratings 2% for each 1000 ft above sea level.
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 springs 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.

13.2 CONVERSION STEPS

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

13.3 CHECKING THE INLET GAS PRESSURE

WHITE-RODGERS 36J24-214 SINGLE 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 28 & 29) 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.
5 T ff d l
H18.1
ORIFICE SIZE (DMS)
ALTITUDE
NATURAL LP GAS
45 55
48 56
49 57
50 58
51 60
52 61
53 62
54 63
55 65
t i l l t f
FIGURE 27 - INSHOT BURNER ASSEMBLY
TABLE 6a - HIGH ALTITUDE SPECIFICATIONS (U.S.A.)
Input
ALTITUDE
K/Btu/hr
0-2000 (0-610 m)
2000-3000 (610-914 m)
3000-4000 (914-1219 m)
4000-5000 (1219-1524 m)
45 5000-6000 (1524-1829 m)
6000-7000 (1829-2134 m)
7000-8000 (2134-2438 m)
8000-9000 (2438-2743 m)
9000-10000 (2743-3048 m)
H18.2
H18.3
th t h f th i l t
37
IOM
ORIFICE SIZE (DMS)
NATURAL LP GAS
50 57
53 58
54 59
55 60
56 62
57 63
58 64
59 65
60 67
H12.8.2
t b
W415-0973 / B / 08.28.13