GAS-FIRED HEATER Installation Manual

CONTENTS (CONT’D)

F.Exhaust Vent and Intake Air Pipe Installation.

G.Heater Removal from a Common Vent System

H.Condensate Removal System

I.Diagrams for Side Wall Venting

Part 8 – Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45,46

A.Gas Connection

B.Gas Piping

C.Gas Table

D.Dungs Gas Valve

Part 9 – Field Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47-49

A.Installation Must Comply With

B.Field Wiring

C.Line Voltage Wiring

D.Thermostat

Part 10 – Field Wiring – Vision 1 Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Part 11 – Start Up Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51-53

A.Check/Control Water Chemistry

B.Freeze Protection (when used)

C.Fill and Test Water System

D.Purge Air from Water System

E.Check for Gas Leaks

F.Check Thermostat Circuit(s)

G.Condensate Removal

H.Final Checks Before Starting The Munchkin Contender

Part 12 – Start-Up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53-55

A.Operating Instructions

B.Adjusting the Set Point

C.Status Menu

D.Test Mode

Part 13 – Start-Up Procedures With The Vision 1 Option . . . . . . . . . . . . . . . . . . . . . . 55-56

A.Programming the Vision I Option

B.Vision I Program Access

C.Vision I Program Navigation

Part 14 – Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59-61

A.Munchkin Error Code

B.Heater Error

C.Heater Fault

Part 15 – Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61-65

A.Maintenance Procedures

B.Combustion Chamber Coil Cleaning Instructions

Part 16 – Heater Inspection and Maintenance Start-Up Charts . . . . . . . . . . . . . . . . . 66-68

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Munchkin Gas-Fired Hot Water Circulating Heater installation manual Contents CONT’D

Gas-Fired Hot Water Circulating Heater specifications

The Munchkin Gas-Fired Hot Water Circulating Heater is a cutting-edge heating solution designed to provide efficient and reliable hot water for residential and commercial applications. Renowned for its compact design and innovative technology, the Munchkin heater combines performance with energy efficiency, making it an ideal choice for those seeking comfort and cost savings.

One of the main features of the Munchkin heater is its modulating burner. This technology intelligently adjusts the heating output based on the demand for hot water, ensuring that energy is not wasted. This leads to lower energy bills and a reduction in environmental impact, as the system only uses the necessary resources to maintain desired water temperatures.

Another notable characteristic is its high-efficiency rating. The Munchkin heater operates with an impressive annual fuel utilization efficiency (AFUE) of up to 95%. This means that the majority of the fuel consumed is converted into usable heat. By maximizing energy utilization, homeowners can enjoy a significant reduction in utility costs while minimizing emissions.

The compact size of the Munchkin Gas-Fired Hot Water Circulating Heater is another significant advantage. It is designed to fit into tight spaces, making it suitable for homes where space is at a premium. This compact design does not compromise performance; instead, it enhances installation flexibility, allowing for placement in basements, closets, or utility rooms.

Munchkin heaters are equipped with advanced control systems that offer enhanced convenience. The digital display and programmable settings allow users to set their preferred temperatures and schedules. This feature not only enhances user comfort but also optimizes energy usage, as water is heated only when necessary.

Safety is also a top priority with Munchkin products. The heater includes built-in safety features such as flame monitoring systems, automatic shut-off capabilities, and pressure relief valves, providing peace of mind for users.

In summary, the Munchkin Gas-Fired Hot Water Circulating Heater is a high-efficiency, compact, and innovative solution for hot water needs. With its modulating burner, high-efficiency rating, advanced control systems, and safety features, it stands out as a reliable choice for those looking to invest in heating technology that prioritizes energy conservation and performance. This heater is truly a forward-thinking solution for modern hot water requirements.