Mueller Fre-Heater D2-120A

Remove and check at least one of the two anode rods. If the anode is 33% or more consumed, both anode rods should be replaced.

Drain and backflush the water tank running enough water from the water inlet or drain to remove all loose scale that has collected in the bottom of the water tank.

Check the operation of the pressure temperature relief valve by manually operating it to see that it will freely flow water should it be required to do so. If there is any doubt that it will not function properly, replace it.

Check all water fittings, valves, etc. to be sure there are no water leaks. Repair as necessary.

Check the operation of all controls, such as the hot gas bypass valve, Aquastat, electric element controls, refrigeration head pressure controls, or any other controls necessary, for the proper operation of the Mueller Fre-Heater and the refrigeration and/or air conditioning systems it is connected to.

NOTICE: All illustrations and diagrams in these instructions are schematic suggestions only and do not attempt to address all of the important design considerations, such as pipe sizing and configuration or the selection and placement of major system components. Every installation must follow known and accepted industry safety practices and various code or legal requirements.

Sign off on the Fre-Heater maintenance