How to Start up a Munchkin Boiler


Once started, a Munchkin boiler will continue operating until all heat requirements are met. When the room temperature thermostat calls for heat, the boiler circulator fan starts and blows warm air into the house. The boiler is also fitted with a return water thermostat. When the temperature falls below the pre-set point, the boiler starts heating water. These two operations prevent the system from short cycling. If the burner goes out and fails to restart automatically, you must follow a procedure that includes a number of safety checks before restarting the boiler.

  • Check the control panel to ensure that the boiler has a minimum of 10 PSI of water pressure. If the control panel displays the low water pressure fault code "PrO," the unit will not operate.

  • Turn off any running faucets and switch off water-consuming appliances such as dishwashers and washing machines until 10 PSI of water pressure is restored to the boiler. This fault rarely occurs; household water pressure is usually set above 65 PSI. Low household water pressure may be caused by the mains water pressure dropping because of a fault in the water company pumps or supply lines.

  • Look at the clear plastic hose between the outlet and the combustion blower on the boiler. If this hose has loosened from slight, sustained vibration, tighten or reconnect the hose. If the hose is damaged, call a Munchkin technician and have him replace it.

  • Check all electric connections and make sure they are secure.

  • Check to see that the main gas shutoff valve is in the open position and do the same with the gas shutoff valve inside the boiler cabinet.

  • Double check the temperature setting on the control panel; it should read 180 degrees Fahrenheit.

  • Make sure the boiler electrical ground wire is properly connected.

  • Turn on the boiler power. Adjust the house thermostat to a setting above room temperature and make sure the combustion blower fan on the boiler starts. The boiler will then run its pre-purge cycle. After the purge sequence, the green "flame on" indicator on the control panel will light up and the boiler will begin operating normally.

Tips & Warnings

  • If you smell gas:
  • 1 -- Shut off all sources of ignition, such as pilot lights, open flames and space heaters;
  • 2 - Do not try to start the boiler or any gas fired appliances;
  • 3 -- Do not touch any electrical switches or use the house phone;
  • 4 -- Evacuate the house and call your gas supplier from a cell phone or from a neighbor's house;
  • 5 -- If you cannot reach your gas supplier, call the fire department immediately.

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