Gas Inlet Pressure; Leak Testing; Purging Gas Lines - Napoleon NBM030S2A Installation And Operating Instructions Manual

IMPORTANT:
ALWAYS USE A BACKUP WRENCH TO PREVENT TWISTING OF THE GAS VALVE. ANY
STRAINS ON THE GAS VALVE CAN AFFECT POSITIONING OF THE ORIFICES RELATIVE
TO THE BURNERS. THIS COULD RESULT IN FAULTY BURNER OPERATION.
Install a manual gas shut-off valve and dirt pocket as close to the furnace as possible. Some local codes call
for the manual gas shut-off valve to be located between 4 feet (1.2m) to 5 feet (1.5m) above fl oor level to
prevent tampering by small children. Ensure that the valve is readily accessible.
IMPORTANT:
ENSURE THAT THE GAS VALVE IS NOT SUBJECTED TO HIGH PRESSURES.
DISCONNECT THE MANUAL SHUT-OFF VALVE AND GAS VALVE DURING ANY
PRESSURE TESTING THAT EXCEEDS 1/2 P.S.I.G. (3.45 KPA).

12.3 GAS INLET PRESSURE

The natural gas inlet supply pressure should be 5" to 7" w.c. (7" w.c. recommended). The LP gas inlet supply
pressure should be 11" to 13" w.c. (12" w.c. recommended). These pressures must be maintained while all other
gas fi red appliances are operating at maximum conditions.
IMPORTANT:
DO NOT EXCEED 13" W.C. INLET PRESSURE WITH EITHER FUEL.
The gas valve has an adjustable internal regulator for controlling burner manifold pressure. Burner manifold
pressure is listed on the furnace rating plate.

12.4 LEAK TESTING

All new gas piping installations should be pressure tested as specifi ed by CAN/CSA-B149.1 & 2, or NFPA 54
ANSI Z223.1 or ANSI/NFPA 58, "Standard for the Storage and Handling of Liquefi ed Petroleum Gases."
Gas piping that has not been pressure tested, from the manual shut-off valve to the furnace gas valve for
example, should be leak tested using an electronic combustible gas detector, a commercially prepared leak
detector, or other locally approved method.

12.5 PURGING GAS LINES

NEVER USE A MATCH, TAPER, CIGARETTE LIGHTER, FLAME OR ANY OTHER IGNITION
FAILURE TO ADHERE TO THIS WARNING CAN CAUSE A FIRE OR EXPLOSION
RESULTING IN PROPERTY DAMAGE, PERSONAL INJURY, OR LOSS OF LIFE.
WARNING
!
WARNING
!
SOURCE TO CHECK FOR LEAKS IN A GAS LINE.
H17.2A
!
H3.19
H17.3.1
H17.4
!
H3.20
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