John Wood Atmospheric Gas (Standard) - Manual (Page 10)

10
LP Gas Only
Liquefied petroleum gas is over 50% heavier than air
and in the occurrence of a leak in the system, the gas
will settle at floor level. Basements, crawl spaces, closets
and areas below ground level will serve as pockets for
the accumulation of gas. Before lighting an L.P. gas water
heater, smell all around the appliance at floor level. If you
smell gas, follow the instructions as given in the warning
on the front page.
When your L.P. tank runs out of fuel, turn off the gas at
all gas appliances including pilot lights. After the tank is
refi lled, all appliances must be re-lit according to their
manufacturer’s instructions.
WARNING
Explosion Hazard
Have a qualified technician make sure L.P. gas pressure
does not exceed 13” water column (3.237 kilopascals).
Failure to do so can result in death, explosion, or fire.