We provide service and support for Munchkin Contender by Heat Transfer Products

When the room thermostat calls for heat, the Munchkin Contender control board will start the pump and start to monitor the return water temperature of the system before the heater will begin to heat the water. Once the controller has sensed a drop in the return water temperature below the temperature set point minus the differential set point, the boiler will start to heat the water. This eliminates the boiler starting every time the thermostat calls for heat. This feature keeps the system from short cycling.

Once the system has sensed the temperature difference, the Munchkin Contender will activate the blower motor for 5 seconds to prepurge the system before starting the Munchkin Contender. The Munchkin Contender Controller will now start to modulate the pre-mix burner based on analyzing the return water temperature, supply water temperature, and the set point temperature. By compiling this information, the controller utilizes an algorithm to fully adjust the firing rate while maintaining the desired output temperature. The pre-mix burner fans have a low voltage direct current drive motor with a pulse relay counting. This system allows precise control over the fan speed and combustion air volumes. Coupled with the gas valve and the swirl plate system set to provide a one-to-one ratio of precisely measured volumes of fuel to air, accurate and instant burner output is achieved. This keeps the Munchkin Contender running at the highest efficiency.

When the thermostat is satisfied, the Munchkin Contender will then go through a 4 second post-purge cycle before shutting off. Munchkin Contenders are equipped with a control display with indicators that show the normal operation of the boiler. This display will also serve as a diagnostic tool for servicing.