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• Installation
Installation
Startup
Manual
Maintenance
Parts
MH18082
WARNING
This manual must only be used by a qualified heating installer/service technician. Read all instructions
in this manual before installing. Perform steps in the order given. Failure to comply could result in
severe personal injury, death or substantial property damage.
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GAS-FIRED HEATER Installation Manual WARNING If the information in this manual is not followed exactly, a fire or explo- sion may result causing property damage, personal injury or loss of life. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance. Do not touch any electrical switch: do not use any phone in your building. Immediately call your gas supplier from a ne
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GAS-FIRED HEATER Installation Manual CONTENTS Part 1 – Product and Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,5 Part 2 – How The Heater Operates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8 Part 3 – Prepare Heater Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11 A. Installations Must Comply With: B. Before Locating Heater C. Clearances for Service Ac
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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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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GAS-FIRED HEATER Installation Manual PART 1: PRODUCT AND SAFETY INFORMATION SPECIAL ATTENTION BOXES The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning the product. DEFINITIONS DANGER CAUTION DANGER indicates an imminently hazardous CAUTION Indicates a potentially hazardous situation which, if not avoided, will result in situation which, if not avoided, may result in death or serio
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GAS-FIRED HEATER Installation Manual PART 1: PRODUCT AND SAFETY INFORMATION (CONT’D) supply to circulator. Instead, shut off the gas WARNING supply at a location external to the appliance. Installer — Read all instructions in this manual, Do not use this heater if any part has been and Munchkin Contender Venting section, under water. Immediately call a qualified before installing. Perform steps in the order service technician to inspect the heater and given. to replace any part of the control
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GAS-FIRED HEATER Installation Manual PART 1: PRODUCT AND SAFETY INFORMATION (CONT’D can cause internal corrosion in system system to circulate for at least 30 minutes to components. Leaks in heater or piping must be completely blend any trapped water that might repaired at once to prevent make-up water. be in the system with the NSF® listed solution. At this point it is suggested that you check the WINTERIZING THE MUNCHKIN CONTENDER concentration of NSF® antifreeze to be sure that protection is
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GAS-FIRED HEATER Installation Manual PART 2: HOW THE MUNCHKIN CONTENDER OPERATES (CONT’D) powered and combustion air is flowing. pump. Route low voltage wires through the opening to the left of the low voltage terminal 4. Swirl Plate System strip. (See Field Wiring Instructions Part 9.) The Swirl Plate on the gas valve controls the 12. Condensate drain connection air and gas flow into the burner, which will assure better mixing for improved This is a condensing high efficiency appliance, combust
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GAS-FIRED HEATER Installation Manual PART 2: HOW THE MUNCHKIN CONTENDER OPERATES (CONT’D) Super Stor Ultra Indirect Water Heater to get a located in the Vision One section of this fast recovery by prioritizing the flow at a higher manual. Optional kit consists of the following temperature than may be needed for the Outdoor sensor – 7250P-319 central heating circuits (this will require two Indirect tank sensor – 7250P-325 separate circulators). You must follow the piping, wiring and programmi
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GAS-FIRED HEATER Installation Manual PART 3: PREPARE MUNCHKIN CONTENDER LOCATION (CONTINUED) NOTICE The Munchkin Contender Heater gas manifold and controls met safe lighting and other performance criteria when heater underwent tests specified in ANSI Z21.10.3 — latest edition. BEFORE LOCATING THE MUNCHKIN CONTENDER 1. Check for nearby connection to: System water piping Venting connections 24" FRONT CLEARANCE Gas supply piping Electrical power 2. Check area around heater. Remove any comb
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GAS-FIRED HEATER Installation Manual PART 3: PREPARE MUNCHKIN CONTENDER LOCATION (CONTINUED) the building and properly terminated. The air WARNING intake and exhaust vent piping lengths, routing and termination method must all comply with the The space must be provided with combus- methods and limits given in the Venting section. tion/ventilation air openings correctly sized for all other appliances located in the same space as F. PREVENT COMBUSTION AIR CONTAMINATION the Munchkin Contender heat
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GAS-FIRED HEATER Installation Manual PART 3: PREPARE MUNCHKIN CONTENDER LOCATION (CONTINUED) in which the appliances remaining connected G. WHEN REMOVING AN EXISTING HEATER to the common venting system are located FROM AN EXISTING COMMON VENT SYSTEM and other spaces of the building. Turn on clothes dryers and any appliance not DANGER connected to the common venting system. Do not install the Munchkin Contender heater Turn on any exhaust fans, such as range into a common vent with any other appl
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GAS-FIRED HEATER Installation Manual PART 4: PREPARE MUNCHKIN CONTENDER (CONTINUED) D. INSTALLATION STEPS WARNING The wall must be capable of carrying the weight 1) Prior to lifting the Munchkin Contender Heater onto the wall, use the enclosed of the heater and its related components. The template to level and locate the 2 primary weights of the heater are approximately: screws (#12 x 3" [3/16" x 3"]) round head MC-50- 71 lbs. tapping screw leaving about 1/4" under the MC-80- 74 lbs. screw head
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GAS-FIRED HEATER Installation Manual PART 5: MUNCHKIN CONTENDER PIPING A. RELIEF VALVE NOTICE Connect discharge piping to safe disposal loca- The Munchkin Contender Heater control module tion, following guidelines in the WARNING below. uses temperature sensors to provide both high limit protection and modulating temperature WARNING control. The control module also provides low water protection by sensing the water pressure To avoid water damage or scalding due to relief of the heat exchanger. So
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GAS-FIRED HEATER Installation Manual PART 5: MUNCHKIN CONTENDER PIPING (CONTINUED) primary/secondary connection. CAUTION 2. Size the piping and components in the space Undersized expansion tanks cause system heating system using recognized design water to be lost from relief valve and makeup methods. water to be added through fill valve. Eventual failure can result due to excessive make-up G. HYDRONIC PIPING WITH CIRCULATORS, water addition. ZONE VALVES AND MULTIPLE HEATERS 2. Expansion tank mu
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GAS-FIRED HEATER Installation Manual PART 5: MUNCHKIN CONTENDER PIPING (CONTINUED) concentration and inhibitor level. The system 6. Install a circulator as shown in piping details (this section). Make sure the circulator is should be tested at least once a year and as properly sized for the system and friction loss. recommend by the producer of the glycol solution. Allowance should be made for the 7. Install an Expansion Tank on the system expansion of the glycol solution in the system supply.
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GAS-FIRED HEATER Installation Manual PART 5: MUNCHKIN CONTENDER PIPING (CONTINUED) The chart below represents the various system temperatures and their respective flows and friction loss through the Munchkin Contender which will aid circulator selection. SYSTEM TEMPERATURE RISE CHART 20˚ t25˚ t30˚ t35˚ t 40˚ t45˚ t Friction Flow Friction Flow Friction Flow Friction Flow Friction Flow Friction Flow Model Feet GPM Feet GPM Feet GPM Feet GPM Feet GPM Feet GPM MC-50 6.5' 5 4.5' 4 3' 3.3 2' 2.5 N/
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GAS-FIRED HEATER Installation Manual MUNCHKIN CONTENDER PIPING (CONTINUED) K. ZONING WITH CIRCULATORS CAUTION It is highly recommended that you carefully 1. Connect heater to system when circulator zoning as shown in 1C and 1D in Piping follow the glycol manufacturer’s recommended Details when zoning with circulators. The concentrations, expansion requirements and heater circulator cannot be used for a zone. It maintenance recommendations (pH additive must supply only the heater loop. breakdown
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GAS-FIRED HEATER Installation Manual M. CONTENDER PIPING DETAILS Piping symbol legend circulator circulator (w/ integral check valve) (w/ isolation flanges) gate valve pressure reducing valve globe valve diff. pressure bypass ball valve anti-scald mixing valve swing-check valve T/P flow-check valve temperature /pressure gauge spring-loaded check valve 3-way motorized mixing valve hose bib / heater drain Munchkin Contender Heater 4-way motorized mixing valve TRV (straight) purging valve TRV
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GAS-FIRED HEATER Installation Manual Standard Munchkin Contender Heater ! Drawing 1A (zoning with valves) Space heating mode zone valves see note 6 make-up water P2 closely differential spaced pressure purge tees bypass valve purging valves OFF anti-scald mixing valve Munchkin Contender Heater T/P Super Stor Ultra indirect DHW Tank NOTES: 1. This drawing is meant to show system piping concept only. Installer is responsible for all equipment & detailing required by local codes. 2. All c
