Munchkin MUNCHKIN HIGH EFFICIENCY HEATER with the "925" Controller manual Dungs GAS Valve

Page 13

GAS CONNECTION

It is recommended that a soapy solution be used to detect leaks. Bubbles will appear on the pipe to indicate a leak is present. The gas piping must be sized for the proper flow and length of pipe, to avoid pressure drop. Both the gas meter and the gas regulator must be properly sized for the total gas load. If you experience a pressure drop greater than 1" WC, the meter, regulator or gas line is undersized or in need of service. You can attach a manometer to the incoming gas drip leg, by removing the cap and installing the manometer. The gas pressure must remain between 3.5" and 14" during stand-by (static) mode and while in operating (dynamic) mode. If an in-line regulator is used, it must be a minimum of 10 feet from the Munchkin. It is very important that the gas line is properly purged by the gas supplier or utility. Failure to properly purge the lines or improper line sizing, will result in ignition failure. This problem is especially noticeable in NEW LP installations and also in empty tank situations. This can also occur when a utility company shuts off service to an area to provide maintenance to their lines. This gas valve must not be replaced with a conventional gas valve under any circumstances. As an additional safety feature, this gas valve has a flanged connection to the Venturi and blower.

DUNGS GAS VALVE

THROTTLE ADJUSTER (NOTE: IF FOR ANY REASON THE THROTTLE NEEDS TO BE ADJUSTED, IT IS VERY IMPORTANT THAT A "COMBUSTION ANAYLYZER" BE USED TO ENSURE SAFE AND PROPER OPERATION. TURN THE ADJUSTER TO THE (+) TO INCREASE GAS OR THE (-) TO DECREASE THE GAS SUPPLY. THIS ADJUSTMENT COULD AFFECT CO/CO% LEVELS. MAKE SURE THE LEVELS CORRESPOND TO THE CHART IN COMBUSTION SETTINGS.)

Fig. 3-1

WARNING

Failure to follow all precautions could result in fire, explosion or death!

13

Page 12 Page 14
Image 13
Page 12 Page 14
Contents With the 925 Controller Munchkin High Efficiency HeaterSpecial Attention Boxes Using this ManualTable of Contents Part 1. General Information Munchkin Ratings and DimensionsHOW IT Operates Recommended Service Clearances Dimensions 80M 140M/199M General PRE-INSTALLATION RequirementPressure Relief Valve Part 2. ElectricalElectrical 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 Sequence of Operation Part 6. START-UP ProceduresItems 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.
Top Page Image Contents