![]() ![]() ![]() the main burner test firing valve is turned onĭ. the temperature controller is set properlyĬ. one hour on and one hour off until the thermostat is satisfied C Before lighting a burner in a steam boiler, ensure that:ī. continuously until the thermostat is satisfiedĭ. downstream of the filter B On seasonal start up, a pool heater should run:Ĭ. Make up water line to the system B Automatic chlorinators must be installed:ĭ. 1/4" line connecting the boiler and cushion tankĭ. 30 psia C A backflow prevent used in a boiler system should be located in the:Ĭ. Low water cut off D The relief valve for a residential low-pressure hot water boiler system should be?ĭ. Direct vent D What safety control protects a steam boiler if the condensate pump fails to return water to the boiler?ĭ. What type of room heater maybe installed in a bathroom?ĭ. ![]()
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