Munchkin MUNCHKIN HIGH EFFICIENCY HEATER with the "925" Controller manual Lighting Instructions

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START-UP PROCEDURES

the room thermostat is connected and turn the room thermostat up above room temperature to start the combustion blower fan to run the Munchkin. The Munchkin will now run its pre- purge cycle, then begin running, which will be indicated by the Green light illuminating under “Flame On” in your display.

DANGER

If you do not follow these instructions exactly, a fire or explosion may

result, causing property damage, personal injury or loss of life.

C. LIGHTING INSTRUCTIONS

FOR YOUR OWN SAFETY READ BEFORE OPERATING

1.This appliance does not have pilot. It is equipped with an ignition device which automatical- ly lights the burner. Do not try to light the burner by hand.

2.BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

WHAT TO DO IF YOU SMELL GAS

Do not try to light any appliance.

Do not touch any electric switch; do not use any phone in your building.

Immediately call your gas supplier from a neighbor's phone. Follow the gas suppliers' instructions.

If you cannot reach your gas supplier, call the fire department.

3.Turn on gas shutoff valve (located inside of the Heater) so that the handle is aligned with the gas pipe. If the handle will not turn by hand, don't try to repair it, call a qualified service tech- nician. Force or attempted repair may result in a fire or explosion.

4.Do not use this appliance if any part has been under water. Immediately call a qualified serv- ice technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

5.The Munchkin Boiler shall be installed so the gas ignition system components are protected from water (dripping, spraying, rain, etc.) during appliance operation and service (circulator replacement, condensate trap, control replacement, etc.)

D. OPERATING INSTRUCTIONS

1.STOP! Read the safety information in Part 6.

2.Set the thermostat to the lowest setting.

3.Turn off all electric power to the appliance.

4.This appliance is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.

5.Remove front cover.

6.Turn gas shutoff valve to “off”.

7.Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Follow Part 6, Section B/Lighting Instructions in the safety information. If you don't smell gas, go to the next step.

8.Turn the gas shutoff valve counter clockwise to “on”. The handle will be horizontal.

9.Replace the Front Cover.

10.Turn on all electric power to appliance.

11.Set the thermostat to the desired setting.

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Contents With the 925 Controller Munchkin High Efficiency HeaterSpecial Attention Boxes Using this ManualTable of Contents HOW IT Operates Munchkin Ratings and DimensionsPart 1. General Information Recommended Service Clearances Dimensions 80M 140M/199M General PRE-INSTALLATION RequirementElectrical Connection Part 2. ElectricalPressure Relief Valve Electrical Connection Wiring Directly to Central Heating Circulator GAS Table Part 3. GAS ConnectionGAS Connection GAS PipingDungs GAS Valve Approved Venting Materials Part 4. VentingVenting the Munchkin Direct vent terminal clearance Minimum clearance, C Vented Appliance Longer Vent RunsCondensate Removal Heater Removal from a Common Vent SystemDiagrams for Sidewall Venting Venting Diagrams for Vertical Venting Hydronic Piping with Circulators or Zone Valves Part 5. PipingMunchkin T50M Munchkin T80M/80M Munchkin 140M Munchkin 199M Circulator SizingFill and Purge Heating System Piping Illustrations Piping Symbol LegendOFF Zone valves Piping Zone valves Make-up water Piping Space heating zone circuit Zone Circulators Make-up water PB1 PB2 PB1 PB2 Items to be Checked Before Lighting the Munchkin Part 6. START-UP ProceduresSequence of Operation Operating Instructions Lighting InstructionsStatus Menu Adjusting the Temperature on the Munchkin DisplayTo Turn OFF GAS to Appliance Test ModeMunchkin Error Code Part 7. Troubleshooting925 Control Board Error Codes Resistance Tables Before Each Heating Season Part 8. MaintenanceMaintenance Procedures Condensate Cleaning InstructionsMaintenance Munchkin Controller Control Wiring LayoutMaintenance Maintenance Page Page Munchkin R1