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Figure 25: Gas Valve Detail - Robertshaw 7000DERHC
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14) Test thermostat operation while the boiler is running. Turn the thermostat to the lowest setting. Both pilot
burner and main burners should stop firing and the vent damper (if used) should close. Raise the thermostat back
to the highest setting. The vent damper (if used) should open and the pilot burner and main burners should relight.
15) Verify high limit operation. Allow the boiler water temperature to increase to high limit setting. The burners
should shut down, the circulator continues running and the vent damper (if used) closes. Allow the boiler water
temperature to drop below high limit setting. The vent damper (if used) should open and the pilot burner and main
burners should relight.
16) Inspect the vent system for flue gas leaks. Repair any leaks found before leaving the boiler in operation.
17) After the boiler has operated for approximately 30 minutes, check the boiler and heating system piping for leaks.
Repair any leaks found at once.
18) Review the “USER’S INFORMATION MANUAL” and system operation with the owner or operator.