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

MUNCHKIN HIGH EFFICIENCY HEATER with the "925" Controller specifications

The Munchkin High Efficiency Heater, equipped with the advanced "925" Controller, represents a significant advancement in heating technology for both residential and commercial applications. Known for its reliability and exceptional performance, this heater is designed to provide efficient heating while minimizing energy costs and environmental impact.

The Munchkin High Efficiency Heater operates on a condensing technology that extracts heat from exhaust gases. This process allows for higher efficiency rates, often exceeding 95%. By recovering heat that would otherwise be lost, the heater maximizes energy utilization, making it an eco-friendly choice for homeowners and businesses alike.

One of the standout features of the Munchkin 925 Controller is its user-friendly interface, which allows for effortless operation and monitoring of the heating system. The controller comes with advanced diagnostic capabilities that provide real-time feedback on system performance. Users can easily adjust settings, program schedules, and monitor energy consumption, ensuring optimal comfort and efficiency.

Furthermore, the Munchkin High Efficiency Heater is equipped with a variety of features that enhance its performance and user experience. The unit is designed with a durable heat exchanger made from stainless steel, which not only improves heat transfer but also ensures longevity and resistance to corrosion.

The heater operates quietly, making it suitable for installation in residential settings, including bedrooms and living spaces. Additionally, its compact design allows for flexible installation options, even in constrained spaces. The Munchkin unit is also compatible with multiple venting options, providing further versatility in installation configuration.

Safety features are a priority in the design of the Munchkin Heater. It includes built-in freeze protection, ensuring that the system operates effectively even in low temperatures. The unit also has an array of safety sensors that monitor for conditions such as flue blockage and overheating, triggering automatic shut-off mechanisms to prevent potential hazards.

In conclusion, the Munchkin High Efficiency Heater with the "925" Controller is a cutting-edge solution for efficient heating. With its superior performance, advanced controller system, durable construction, and comprehensive safety features, it remains a top choice for those looking to improve their heating efficiency while reducing energy consumption. Whether it's for residential or commercial use, the Munchkin heater promises reliability and comfort in any environment.
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