Munchkin Gas-Fired Hot Water Circulating Heater Swirl Plate System, Control, Flue pipe adapter

GAS-FIRED HEATER Installation Manual

PART 2: HOW THE MUNCHKIN CONTENDER OPERATES (CONT’D)

powered and combustion air is flowing.

4.Swirl Plate System

The Swirl Plate on the gas valve controls the air and gas flow into the burner, which will assure better mixing for improved combustion.

5.Supply water temperature sensor

This sensor monitors heater output water temperature (system supply). The control module adjusts the heater firing rate so the outlet temperature is correct.

6.Return water temperature sensor

This sensor monitors the return water temperature (system return). The control module reduces or increases heater input, depending on how close the return water temperature is to the outlet water temperature.

7.Temperature and pressure gauge

Allows the user to monitor the systems temperature and pressure.

8.Control

The integrated control system monitors the return and supply water and regulates the fan speed to regulate the unit’s BTU output. This allows the unit to only deliver the amount of heated energy required and nothing more!

9.Flue pipe adapter

The flue pipe adapter may be positioned so that the installer is able to find a position that will best facilitate the exhaust and combustion air pipe connections with the least number of elbows even in the most challenging applications.

10.Burner

Made with metal fiber and stainless steel construction, the burner uses pre-mixed air and gas and provides a wide range of firing rates.

11.Electrical field connections with terminal strips

The electrical cover plate allows access the line voltage terminal strip and the low voltage terminal strip. Attach line voltage conduits to the three holes at the right of the line voltage terminal strip for power, CH pump and DHW

pump. Route low voltage wires through the opening to the left of the low voltage terminal strip. (See Field Wiring Instructions Part 9.)

12.Condensate drain connection

This is a condensing high efficiency appliance, therefore this unit has a condensate removal system. Condensate is nothing more than water vapor, derived from the combustion products, similar to an automobile when it is initially started. It is very important that the condensate line is sloped away from the heater and down to a suitable inside drain, if the condensate outlet on the Munchkin Contender is lower than the drain, you must use a condensate removal pump (kit p/n 554200 available from Heat Transfer Products, Inc.) A condensate filter, if required by local authorities can be made up of lime crystals, marble or phosphate chips and will neutralize the condensate. This can be done in the field by the installer or you may purchase one from Heat Transfer Products, Inc. (P/N N1100). It is also very important that the condensate line is not exposed to freezing temperatures or any other type of blockage. Plastic tubing should be the only material used for the condensate line. Steel, brass, copper or others will be subject to corrosion or deterioration. A second vent may be necessary to prevent condensate line vacuum lock if a long horizontal run is used. Also, an increase in pipe size may be necessary to drain properly. Support of the condensation line may be necessary to avoid blockage of the condensate flow.

13.Spark ignition

The burner flame is ignited by applying a high voltage to the system spark electrode. This causes a spark from electrode to ground.

14.The Vision 1 Optional System

The Vision I System will allow the installing contractor to take the highly efficient modulating Munchkin Contender and make it even more efficient by controlling the temperature delivered to the central heating circuits based on the outside temperature. The Vision I system is also a two temperature system, one temperature for central heating and the other temperature to the Super Stor Ultra Indirect water heater. This allows the user to increase the temperature supplied to the

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