Munchkin 399M manual Part 2. Electrical, General Information / Electrical, Pressure Relief Valve

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GENERAL INFORMATION / ELECTRICAL

CAUTION

The Munchkin is certified as an indoor appliance. Do not install the Munchkin outdoors or locate where it will be exposed to freezing temperature. This includes all related piping and components. If the Munchkin is subjected to flood water or submersed in water, the Munchkin must be replaced.

NOTE: Service clearance of the Munchkin

1.The front of the appliance needs 24" of clearance for service minimum. It may have a non-rated or combustible door or access panel and must have a minimum of 24" clearance.

2.The left side of the heater is 12" clearance

3.The right side of the heater is 12" clearance

4.The top of the heater is 15" clearance.

If the Munchkin is set up for liquefied petroleum (LP) gas, some geographic areas follow the Uniform Mechanical Code, section 304.6, “Liquefied petroleum gas burning appliances shall not be installed in a pit, basement or similar location where heavier-than-air gas might collect. Appliances so fueled, shall not be installed in a below grade under-floor space or basement unless such location is provided with an approved means for removal of unburned gas.”

CAUTION

Condensation removal: This is a condensing, high efficiency appliance, therefore condensation removal must be addressed to avoid damage to surrounding area or appliance. See Part (4) Section E for Condensate Requirements.

WARNING

D. PRESSURE RELIEF VALVE

A pressure relief valve is installed into the front right side manifold. We recommend a WATTS ¾" M 335 MI valve or equivalent and meets the requirements of ANSI/ASME Heater and Pressure Vessel Code, Section IV or CSA B51; Heater, Pressure Vessel and Piping Code as applicable for heating heaters. A ¾" pipe must be directed to a floor drain or suitable location within 6" of a drain or floor. Protect from freezing, do not plug or cap pressure relief valve. Serious explosion causing property damage and or loss of life could result. Under no circumstances should the relief valve be eliminated, capped or plugged.

PART 2. ELECTRICAL

A. ELECTRICAL CONNECTION

The electrical connection for the Munchkin is on the left hand side of the unit. There is a ½” knockout location for an electrical connection for both the incoming power and the central heating circulator connection. All electrical wiring must be performed by a qualified licensed electrician in accordance with National Electrical Code ANSI Z223.1/NFPA 54 to and/or the Canadian Electrical Code, Part 1 CSA C22.1, or to the applicable codes and standards. For your convenience, we have labeled all the wires that need to be connected to operate the Munchkin.

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Contents Munchkin High Efficiency 399M Commercial Boiler What to do if YOU Smell GASUsing this Manual Using this ManualTable of Contents General Information Munchkin Ratings and DimensionsPart 1. General Information HOW IT OperatesDimensions PRE-INSTALLATION Requirements Pressure Relief Valve Part 2. ElectricalGeneral Information / Electrical Electrical ConnectionElectrical Part 3. GAS Connection Electrical / GAS ConnectionGAS Piping GAS ConnectionGAS Connection GAS TableCombustion Settings Munchkin Burnertech GAS ValveApproved Venting Materials Part 4. VentingVenting Venting the Munchkin in 4 or 6 Plastic PipeVenting Important Note Longer Vent Runs Using a Combination 4 to 6 Pipe Fittings or Piping Equivalent FeetDiagrams for Sidewall Venting Heater Removal from a Common Vent SystemDiagram for Vertical Venting Condensate Requirements Part 5. PipingVenting / Piping Hydronic Piping with Circulators or Zone ValvesPiping Circulator SizingFill and Purge Heating System Piping Symbol Legend Piping IllustrationsZone valves Make-up water Zone valves Mixing valve 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 ProceduresSTART-UP Procedures Lighting InstructionsAdjusting the Temperature on the Munchkin Display Operating InstructionsTest Mode Status MenuTo Turn OFF GAS to Appliance Part 7. Servicing START-UP Procedures / ServicingMunchkin Temporary Fault Condition Sequence of OperationMunchkin Fault Requiring Manual Reset ServicingServicing Remedy Call Factory for further assistance Resistance Tables Part 8. Maintenance MaintenanceLeaks Control Wiring Layout Munchkin ControllerMaintenance Maintenance Page Page Heat Transfer Products, Inc LP-121 REV /20/04
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