7
GAS PIPING AND GAS PRESSURE REQUIREMENTS
HVF36-BB & HVF42-BB
All gas piping must be installed to comply with local codes or, in the absence of local codes
,
with the latest edition of the
National Fuel Gas Code ANSI 223.1/NFPA 54.
Unions in gas lines shall be of the ground joint type. Compounds used on threaded joints of gas piping must be resistant
to the action of liquefied petroleum gas.
Gas piping must be of sufficient size to provide a minimum natural gas pressure at the appliance of 7” water column or
11” for LP gases. The maximum inlet pressure to the unit must not exceed 10” for natural gas and 13” for LP gases. Mani-
fold pressure for natural gas is 4”WC and 10”WC for LP gas. If this unit is to be supplied with LP gas (bottled propane) the
tank or bottle supplying the gas must have a regulator that reduces the gas pressure to between 11 and 13 inches water
column. The control will not operate with gas line pressure directly from the tank and may leak gas due to this excessive
pressure.
DANGER:
OPERATION OF THIS UNIT ON LP GAS WITHOUT AN APPROVED REGULATOR AT THE SUPPLY CON-
TAINER WILL LEAD TO GAS LEAKS AT THE CONTROL WITH POSSIBLE FIRE OR EXPLOSION.
Include a manual shutoff valve and union in the line so the control or heater may be disconnected for servicing. Include a
drip leg and a plugged 1/8-inch N.P.T. tapping in the line also. The tapping must be accessible for test gauge connection
immediately upstream of the gas supply connection to the unit.
Use a soap-water solution or a liquid gas leak detector to coat each joint in the piping system and look for bubbles, which
indicate gas leaks. Repair all gas leaks.
CAUTION:
THE LOG SET AND ITS INDIVIDUAL SHUTOFF VALVE MUST BE DISCONNECTED FROM THE GAS SUP-
PLY PIPING SYSTEM DURING PRESSURE TESTING OF THAT SYSTEM AT TEST PRESSURES IN EXCESS OF 1/2
PSIG. THE UNIT MUST BE ISOLATED FROM THE GAS SUPPLY PIPING SYSTEM BY CLOSING ITS INDIVIDUAL
MANUAL SHUTOFF VALVE DURING ANY PRESSURE TESTING OF THE GAS SUPPLY PIPING SYSTEM AT TEST
PRESSURES EQUAL TO OR LESS THAN 1/2 PSIG. PRESSURES IN EXCESS OF 1/2 PSIG WILL CAUSE DAMAGE
TO THE CONTROL VALVE AND MAY CAUSE DAMAGE TO THE SHUTOFF VALVE.
DANGER:
DO NOT USE CANDLES, MATCHES OR OTHER IGNITION SOURCES WHEN CHECKING FOR LEAKS.
FUEL GASES ARE VERY FLAMMABLE AND, IN CERTAIN CONCENTRATIONS, EXPLOSIVE. CHECKING FOR LEAKS
WITH AN OPEN FLAME MAY LEAD TO FIRE OR EXPLOSION.
Fireplace screens need to be closed before operation of this unvented decorative room heater.
This firebox has no chimney; therefore,
DO NOT
burn anything such as household refuse, paper, firewood, or manufac-
tured composition logs. Burning anything in this firebox other than properly plumbed LP or Natural gas connected to a
decorative type unvented room heater is strictly prohibited. Doing so will cause an immediate hazard and void any and all
warranties associated with this product.
IMPORTANT: SAFETY
