Pressure
Regulator
3/8" NPT Pipe Nipple
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| Tee Joint |
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Test |
| Reducer | |
Gauge |
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| Bushing to |
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Connection |
| 1/8" NPT | |
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| 1/8" NPT |
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| Plug Tab |
Sediment |
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| Tee Joint |
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| Pipe | ||
Trap |
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| Nipple | ||
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| Cap |
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Heater Cabinet
Ground Joint Union
Manual |
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Shutoff |
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Valve |
| Natural Gas |
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From |
| (4" W.C. to |
| 10.5" W.C. Pressure) | |
Gas Meter |
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| L.P Gases |
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| (11.0" W.C. to |
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| 14.0" W.C. Pressure) |
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Figure 8
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.
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