Slant/Fin VHG-100-CH Installation And Service Manual page 34

DO NOT TIGHTEN FITTINGS WITHOUT SUPPORTING THE GAS VALVE, A BACKING WRENCH MUST BE
USED
Figure 7.4
Strain on the gas valve and fittings may result in vibration, premature component failure and leakage and may
result in a fire, explosion, property damage, serious injury or death.
Do not use an open flame to test for gas leaks. Failure to follow these instructions may result in fire.
When performing a pressure test on the gas line piping, the following guidelines must be followed.
•
The boiler and its individual shutoff valve must
any pressure testing of that system at test pressures in excess of 0.5 psi (3.45 kPa).
•
The boiler must be isolated from the gas supply piping system
during any pressure testing of the gas supply piping system at test pressures equal to or less than 0.5 psi
(3.45 kPa).
34
WARNING
E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
Install a manual Shutoff Valve. The valve must have
been certified by a nationally accredited testing lab.
Should overheating occur or the gas supply fail to shut
off, turn the manual gas shutoff valve to off (closed). The
gas line piping can then safely be removed from the
appliance for servicing.
Test the gas pipe for leaks from the boiler up to the gas
pressure regulator.
Carefully vent the gas pipe (outside in open air) before
putting the appliance into operation for the 1st time.
WARNING
be disconnected from the gas supply piping system during
by closing its individual manual shutoff valve
A sediment trap must be provided
directly below the boiler.