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

Page 11

 

 

 

 

DIAGRAM "A"

 

 

WIRING DIAGRAM CONNECTING TO CIRCULATOR

 

 

GREEN (GROUND)

 

 

WHITE (NEUTRAL)

 

 

 

BLACK

 

BROWN (NEUTRAL)

GREEN (GROUND)

NORMALLY OPEN

ORANGE (HOT)

 

THERMOSTAT

 

CONNECTION

 

GRAY

 

T

 

 

 

WHITE

 

 

 

 

(NEUTRAL)

T

GRAY

 

 

 

BLACK

 

 

 

 

(HOT)

 

 

 

 

 

 

 

 

 

 

GREEN

 

 

 

 

 

(GROUND)

 

 

 

 

ELECTRICAL

 

 

 

SWITCH JUNCTION BOX

 

 

 

 

120V 60 HZ

Figure 2-1: Connection Wiring Directly to Central Heating Circulator

ZONE

 

 

 

 

THERMOSTAT

 

 

 

 

R845A

 

 

 

BOILER

SWITCHING

 

 

 

 

 

 

"TT"

RELAY ZONE

 

 

 

 

 

 

GRAY

 

 

 

 

1K1

 

5

3

 

 

 

 

T

 

 

 

 

T

 

 

 

 

 

 

1K1

1K2

 

1

2

6

4

BOILER

"TT"

 

 

 

 

GRAY

 

 

 

ZONE

 

L1 HOT (BLACK)

 

 

CIRCULATOR

 

 

 

 

 

120 VOLT

 

 

 

 

L2 NEUTRAL

 

 

 

(WHITE)

 

 

 

Figure 2-3: For circulator amp loads greater than 4 amps (3 amps for “HA” models) use the wiring diagram shown at left. The brown and orange wires will not be used in this application.

 

 

 

 

 

ELECTRICAL

 

 

 

DIAGRAM "B"

 

WIRING DIAGRAM WITHOUT CONNECTION TO CIRCULATOR

 

 

ORANGE BROWN GREEN

IMPORTANT NOTE:

 

 

BE CERTAIN THAT THE ORANGE

 

 

WIRE IS SECURELY CAPED.

 

 

FAILURE TO DO SO COULD

 

 

 

 

 

RESULT IN INJURY OR FIRE

 

 

 

 

 

AND COULD DAMAGE THE CONTROL.

NORMALLY OPEN

ORANGE (HOT)

BROWN (NEUTRAL)

GREEN (GROUND)

 

 

THERMOSTAT

 

 

CONNECTION

 

T

GRAY

WHITE

GRAY

(NEUTRAL)

T

BLACK

 

(HOT)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GREEN

 

 

 

 

 

(GROUND)

 

 

 

 

 

GROUND

 

 

 

 

 

BUS

 

 

 

 

ELECTRICAL

 

 

SWITCH JUNCTION BOX

 

 

 

 

120V 60 HZ

Figure 2-2: Connection Wiring without Wiring Central Heating Circulator

Note to Electrical Contractor: The orange wire is 120 Volt/4 Amp maximum for central heating circulator only. Loads greater than 4 amps or 3 amps for HA models only will blow the fuse on the board. The brown wire is the neu- tral wire for the central heating pump only.

11

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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.