Munchkin
399M
manual
Maintenance
Diagrams for Sidewall Venting
Piping Symbol Legend
Control Wiring Layout
Maintenance
START-UP Procedures
Combustion Settings
Using this Manual
Test Mode
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MAINTENANCE
41
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Contents
What to do if YOU Smell GAS
Munchkin High Efficiency 399M Commercial Boiler
Using this Manual
Using this Manual
Table of Contents
Part 1. General Information
Munchkin Ratings and Dimensions
General Information
HOW IT Operates
Dimensions PRE-INSTALLATION Requirements
General Information / Electrical
Part 2. Electrical
Pressure Relief Valve
Electrical Connection
Electrical
Electrical / GAS Connection
Part 3. GAS Connection
GAS Connection
GAS Connection
GAS Piping
GAS Table
Munchkin Burnertech GAS Valve
Combustion Settings
Venting
Part 4. Venting
Approved Venting Materials
Venting the Munchkin in 4 or 6 Plastic Pipe
Venting
Important Note
Fittings or Piping Equivalent Feet
Longer Vent Runs Using a Combination 4 to 6 Pipe
Heater Removal from a Common Vent System
Diagrams for Sidewall Venting
Diagram for Vertical Venting
Venting / Piping
Part 5. Piping
Condensate Requirements
Hydronic Piping with Circulators or Zone Valves
Circulator Sizing
Piping
Fill and Purge Heating System
Piping Illustrations
Piping Symbol Legend
Zone 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
START-UP Procedures
Part 6. START-UP Procedures
Items to be Checked Before Lighting the Munchkin
Lighting Instructions
Operating Instructions
Adjusting the Temperature on the Munchkin Display
To Turn OFF GAS to Appliance
Test Mode
Status Menu
Munchkin Temporary Fault Condition
START-UP Procedures / Servicing
Part 7. Servicing
Sequence of Operation
Servicing
Munchkin Fault Requiring Manual Reset
Servicing
Remedy Call Factory for further assistance
Resistance Tables
Maintenance
Part 8. Maintenance
Leaks
Munchkin Controller
Control Wiring Layout
Maintenance
Maintenance
Page
Page
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