Gas-Fired Products 602-30 - Manual (Page 11)

Page 11
LEAK CHECKING:
GENERAL : Although all gas connections on the heater are leak tested at the
factory prior to shipment, a complete gas tightness check must be performed at the
installation site due to possible mishandling in shipment, or excessive pressure
unknowingly being applied to the appliance. Periodically check the whole system for
leaks, or immediately check if the smell of gas is detected.
BEFORE TESTING
Do not smoke while leak testing. Extinguish all open flames.
Make a soap solution of one part liquid detergent and one part water. You will need
a spray bottle, brush or a piece of rag to apply the solution to the fittings.
For LP units, check with a full cylinder.
CAUTION : NEVER LEAK TEST WITH AN OPEN FLAME
PRESSURE TESTING-GAS SUPPLY PIPING SYSTEM
The appliance and its individual shutoff valve must be disconnected from the gas
supply piping system during any pressure testing of that system at test pressures
in excess of 1/2 psig.
The appliance 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 less than 1/2 psig.
Pressure
Regulator
3/8" NPT
Pipe Nipple
Tee Joint
1/8" NPT
Plug Tab
Reducer
Bushing to
1/8" NPT
Tee Joint
Pipe
Nipple
Cap
Test
Gauge
Connection
Sediment
Trap
Heater Cabinet
Ground Joint Union
Manual
Shutoff
Valve
From
Gas Meter
Natural Gas
(4" W.C. to
10.5" W.C. Pressure)
L.P Gases
(11.0" W.C. to
14.0" W.C. Pressure)
Figure 8