Testing Gas Piping
DANGER: Before placing gas piping into service, carefully test it to assure every joint is gas tight. Bubble test all joints with a soap solution. NEVER TEST WITH AN OPEN FLAME AS FIRE OR EXPLOSION WILL RESULT.
For any pressure testing in excess of 1/2 psi, the boiler and its individual shutoff valve must be isolated from the piping system by disconnecting them and capping the outlet(s). For any pressure testing equal to or less than 1/2 psi, the boiler must be isolated from the piping system by closing its manual shutoff valve.
Minimum pressure required at the gas valve inlet is 5" W.C. for natural gas and 11" W.C. for propane. Maximum pressure allowable at the gas valve inlet is 12" W.C. If the gas pressure is above these limits, a pressure regulator must be installed. If the gas pressure is below these limits, contact the local utility.
BEAM |
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| APPLIANCES |
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| PIPE CLAMP |
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| GAS | |||||||||||
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MANUAL MAIN |
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| METER | |||||||||||
SHUT OFF |
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FIGURE 2.11
UNION
GAS
VALVE
SEDIMENT
TRAP
STEP 6: WIRING THE BOILER
WARNING: Turn off electrical power supply before servicing. Contact with live electric components can cause electric shock or death.
All electrical and control wiring must be installed in accordance with the codes listed in Section 1 of this manual. Follow the wiring diagram for your particular installation as shown in Figures 2.13 through 2.18.
the primary pressuretrol when facing the front of the boiler). Connect wiring assemblies (provided on boiler) from the low water
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| FOR FIELD |
| FOR FIELD |
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| FOR FIELD |
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| FOR FIELD | ||||||||||||||||||||||||||||||||||
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| CONNECTION |
| CONNECTION |
| CONNECTION |
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| CONNECTION | ||||||||||||||||||||||||||||||||||||||
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| TO PRIMARY |
| TO SECONDARY |
| TO PRIMARY |
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| TO SECONDARY | ||||||||||||||||||||||||||||||||||||||
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| PRESSURE |
| PRESSURE |
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| PRESSURE |
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| PRESSURE | ||||||||||||||||||||||||||||||||||
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| CONTROL |
| CONTROL |
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| CONTROL |
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| CONTROL | ||||||||||||||||||||||||||||||||||
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| (ON THE RIGHT) |
| (ON THE LEFT) |
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| (ON THE RIGHT) | ||||||||||||||||||||||||||||||||||||||
} |
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| WIRE |
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| WIRE |
| WIRE |
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| WIRE | ||||||
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| ASS'Y. |
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| ASS'Y. |
| ASS'Y. |
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| ASS'Y. | |||||||||||||
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| 400 SERIES |
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| OR M & M |
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| PS804 LWCO |
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| TRANSFORMER |
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| TRANSFORMER |
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| GAS |
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| GAS |
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| VALVE |
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| VALVE |
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| FOR BOILERS EQUIPPED WITH | |||||||||||||||||||||||||||||||||||||||||||
| FOR BOILERS EQUIPPED WITH |
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| 400 SERIES OR M&M PS804 | |||||||||||||||||||||||||||||||||||||||||||||||
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| FIGURE 2.12 | ||||||||||||||||||||||||||||||||||||||||||||||||
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| FOR BOILERS EQUIPPED WITH |
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| FOR BOILERS EQUIPPED | |||||||||||||||||||||||||||||||||||||||||||
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| 400 SERIES OR M & M PS804 LWCO |
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11