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Munchkin Gas-fired heater Installation Manual
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W
ARNING
This manual must only be used by a qualified heating installer/service technician. Read all instructions
in this manual before installing. P
erform steps in the order given. Failure to comply could result in
severe personal injury
, death or substantial property damage.
• Installation
• Startup
• Maintenance
• Parts
Installation
Manual
MH18082
2
Table of Contents
Default Chapter
3
Table of Contents
3
Part 1: Product and Safety Information
5
Part 2 - How the Heater Operates
7
Part 3 - Prepare Heater Location
9
Installations Must Comply with
9
Clearances for Service Access
10
Residential Garage Installation
11
Prevent Combustion Air Contamination
11
Part 4: Prepare Munchkin Contender Heater
12
Remove Munchkin Contender Heater from Box
12
Munchkin Contender Wall Mounting Instruction
13
Installation Steps
13
Part 5: Munchkin Contender Piping
14
Relief Valve
14
General Piping Information
14
Separate Low Water Cutoff
14
Backflow Preventer
14
System Water Piping Methods
14
Circulators
15
Hydronic Piping with Circulators, Zone Valves and Multiple Heaters
15
Circulator Sizing
16
Fill and Purge Heating System
17
Zoning with Zone Valves
18
Multiple Heaters
18
Contender Piping Details
19
Space Heating Mode
22
Part 6 - Contender Piping with Optional Vision 1 System
26
Vision 1 System Piping
26
Zoning with Zone Valves Using Vision I
26
Zoning with Circulators Using Vision I
26
Part 7 - Venting Combustion Air and Condensate Removal
37
Installing Exhaust Vent and Intake Air Vent
37
General
37
Approved Materials for Exhaust Vent and Intake Air Vent
37
Exhaust Vent and Intake Air Vent Pipe Location
37
Exhaust Vent and Intake Air Vent Sizing
38
Heater Removal from a Common Vent System
42
Condensate Removal System
43
Diagrams for Sidewall Venting
44
Part 8: Gas Piping
46
Gas Connection
46
Gas Piping
47
Dungs Gas Valve
47
Part 9: Field Wiring
48
Installation Must Comply with
48
Field Wiring
48
Line Voltage Wiring
48
Thermostat
48
Part 10: Field Wiring - Vision 1 Option
51
Part 11. Start-Up Preparation
52
Check/Control Water Chemistry
52
Freeze Protection (When Used)
52
Fill and Test Water System
52
Purge Air from Water System
53
Check for Gas Leaks
53
Check Thermostat Circuit(S)
53
Condensate Removal
54
Final Checks before Starting the Munchkin Contender
54
Part 12. Start-Up Procedure
54
Operating Instructions
55
Adjusting the Setpoint
55
Status Menu
55
Test Mode
56
Part 13 - Start-Up Procedures with the Vision 1 Option
56
Programming the Vision I Option
56
Vision I Program Access
56
Vision I Program Navigation
57
Part 14: Troubleshooting
60
Munchkin Error Code
60
Heater Error
60
Heater Fault
60
Part 15: Maintenance
62
Maintenance Procedures
62
Combustion Chamber Coil Cleaning Instructions
63
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Munchkin Gas-fired heater Specifications
General
Brand
Munchkin
Model
Gas-fired heater
Category
Water Heater
Language
English
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