Munchkin MUNCHKIN HIGH EFFICIENCY HEATER with the "925" Controller manual Part 2. Electrical

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GENERAL INFORMATION / ELECTRICAL

CAUTION

The Munchkin is certified as an indoor appliance. Do not install the Munchkin outdoors or locate where it will be exposed to freezing temperature. This includes all related piping and components. If the Munchkin is subjected to flood water or submersed in water, the Munchkin must be replaced.

Note: Service clearance of the Munchkin: See Section 1, Figures 1-1 and 1-2.

If the Munchkin is set up for liquefied petroleum (LP) gas, some geographic areas follow the Uniform Mechanical Code, section 304.6, “Liquefied petroleum gas burning appliances shall not be installed in a pit, basement or similar location where heavier-than-air gas might collect. Appliances so fueled, shall not be installed in a below grade under-floor space or basement unless such location is provided with an approved means for removal of unburned gas.”

CAUTION

Condensation removal: This is a condensing high efficiency appliance, therefore condensation removal must be addressed to avoid damage to surrounding area or appliance. See Part (4) Section E for Condensate Requirements.

WARNING

D. PRESSURE RELIEF VALVE

A pressure relief valve is installed into the front right side manifold. We recommend a WATTS ¾" M 335 MI valve or equivalent and meets the requirements of ANSI/ASME Heater and Pressure Vessel Code, Section IV or CSA B51; Heater, Pressure Vessel and Piping Code as applicable for heating heaters. A ¾" pipe must be directed to a floor drain or suitable location within 6" of a drain or floor. Protect from freezing, do not plug or cap pressure relief valve. Serious explosion causing property damage and or loss of life could result. Under no circumstances should the relief valve be eliminated, capped or plugged.

PART 2. ELECTRICAL

A. ELECTRICAL CONNECTION

The electrical connection for the Munchkin is on the left hand side of the unit. There is a ½” knockout location for an electrical connection for both the incoming power and the central heating circulator connection. All electrical wiring must be performed by a qualified licensed electrician in accordance with National Electrical Code ANSI Z223.1//NFPA 54 to and/or the Canadian Electrical Code, Part 1 CSA C22.1, or to the applicable codes and standards. For your convenience, we have labeled all the wires that need to be connected to operate the Munchkin.

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Contents With the 925 Controller Munchkin High Efficiency HeaterSpecial Attention Boxes Using this ManualTable of Contents Munchkin Ratings and Dimensions Part 1. General InformationHOW IT Operates Recommended Service Clearances Dimensions 80M 140M/199M General PRE-INSTALLATION RequirementPart 2. Electrical Pressure Relief ValveElectrical Connection Electrical Connection Wiring Directly to Central Heating Circulator GAS Connection Part 3. GAS ConnectionGAS Piping GAS TableDungs 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 Part 6. START-UP Procedures Sequence of OperationItems to be Checked Before Lighting the Munchkin 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 Maintenance Procedures Part 8. MaintenanceCondensate Cleaning Instructions Before Each Heating SeasonMaintenance 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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