GAS-FIRED HEATER Installation Manual

PART 12. START-UP PROCEDURE (CONTINUED)

A. OPERATING INSTRUCTIONS

Remove Munchkin Contender Heater cover. If you smell gas, STOP. Follow listed safety instructions. If you do not smell gas, follow the next steps.

1.Turn on all electric power to appliance.

2.Adjust the temperature setpoint of the Munchkin Contender Heater if desired. The factory default setting is 180°. If changes are ncessary follow “Adjusting The Munchkin Setpoint” in this section.

3.Set the thermostat to the desired setting.

4.If the appliance fails to start, refer to the Troubleshooting section in the back of this manual.

DANGER

Water temperature over 125 degrees F. can cause severe burns instantly, or death from

scalds. Children, disabled, and

elderly are at highest risk of being scalded. See instruction manual before setting temperature at water

heater. Feel water before bathing or showering! Temperature limiting valves are available.

B.ADJUSTING THE SETPOINT

1.Before you can change the temperature from the factory setting of 180 degrees. You must make sure that none of the thermostats are call- ing for heat. The controller will not memorize a program setting while in a heating cycle. To adjust the temperature to the Munchkin Contender simply press in the {S3/Program} key for three seconds until you see a flashing (C) then an alternate value of (180). This number is the factory set point of the unit, which is 180 degrees. To change the temperature, simply push either the {S1/-}or {S2/+} on the display. The {S1/-}button will decrease the temperature while the {S2/+} will increase the temperature of the Munchkin. The temperature of the heater can be set as low as 50 Degrees and as high 180 Degrees. These ranges are your maximum and minimum ranges of the heater. In addition to changing the temperature you are also allowed to change three more settings in this model (1. Munchkin Contender Heater differential – 2.

Indirect setting (with Vision System option) – 3. Celsius to Fahrenheit measurement. Simply press in the {S3/Program} key to get to next value, the Munchkin Contender Heater differential set- ting will appear in the display ch and alternating value of 30. This allows the installer to adjust the activation of the burner based on the differential temperature setting of the Munchkin Contender Heater. The burner will not start until the outlet water temperature reaches a temperature that is equal to the temperature setting for the Munchkin Contender Heater, minus the differen- tial EX: The Heater is set to heat at 180° F degrees and the differential is set at 30° F. The burner will not start until the outlet temperature of the system reaches 149° F degrees (180° – 30° F = 150° F). To adjust, press either {S1/-}(Decrease Value) or {S2/+} (Increase Value) Ranges 5° F to 30° F. Press the {S3/Program} key again and you will see the Indirect Setting de and an alternative value of 119 (with Vision Systems option) To adjust, press either {S1/-}Decrease Value) or {S2/+} (Increase Value).

The final adjustment in this mode is the Fahrenheit to Celcius measurement. Press the {S3/Program} key again and you will see t and alternating value of F. To change value press the {S1/-}or {S2/+} to choose the correct measurement.

C. STATUS MENU

Installers are also able to check the current status of the Munchkin Contender Heater parameters by pressing {S4/RESET} key for 3 seconds. Once acti- vated, the display will show d1 alternating value of the actual outlet temperature. Actual values are displayed for each function. To view the next value simply press the {S/4} key to go to the next displayed value. Listed below are the values which can be displayed. These values cannot be changed. To exit this menu, simply press {S3/Program} key to resume normal operation.

Function Value

d1 — Actual Temperature from outlet sensor

d2 — Actual Temperature from inlet sensor

d3 — If using a standard mechanical control, the control will display 1 for closed 0 for open

If the sensor is connected to the SuperStor Indirect Fired Water Heater it will measure the actual temperature. (Vision option.)

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Munchkin Gas-Fired Hot Water Circulating Heater Part 12. START-UP Procedure, Operating Instructions, Status Menu
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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.
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