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TABLE OF CONTENTS
3
TABLE OF CONTENTS
PART 1 . . . . . . . . . . . . . . . . . . . . . .4 thru 8
GENERAL INFORMATION
A How It Operates . . . . . . . . . . . . . . . . . .4
B Munchkin Ratings and Dimensions . .5–7
C Pre-installation Requirements . . . . . . .7
D Pressure Relief Valve . . . . . . . . . . . . . .8
PART 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
ELECTRICAL
A Electrical Connection . . . . . . . . . . . . . .9
PART 3 . . . . . . . . . . . . . . . . . . . .10 thru 11
GAS CONNECTION
A Gas Connection . . . . . . . . . . . . . . . . . .10
B Gas Piping . . . . . . . . . . . . . . . . . . . . . .10
C Gas Table . . . . . . . . . . . . . . . . . . . . . . .10
PART 4 . . . . . . . . . . . . . . . . . . . .12 thru 18
VENTING
A Approved Venting Materials . . . . . . . .12
B Venting the Munchkin in
3”, 4” or 6” Plastic Pipe . . . . . . . . . . .12
C Longer Vent Runs . . . . . . . . . . . . . . .14
D Heater Removal from a
Common Vent System . . . . . . . . . . . .15
E Condensate Removal . . . . . . . . . . . . .16
PART 5 . . . . . . . . . . . . . . . . . . . .19 thru 29
PIPING
A Expansion Tank . . . . . . . . . . . . . . . . . .19
B High Velocity Circulator Pump . . . . . .19
PART 6 . . . . . . . . . . . . . . . . . . . .29 thru 33
START UP PROCEDURES
A Sequence of Operation . . . . . . . . . . .29
B Items to be checked before
lighting the Munchkin . . . . . . . . . . . . .29
C Lighting Instructions . . . . . . . . . . . . . .30
D Operating Instructions . . . . . . . . . . . .30
E Adjusting the Operating Set Points
of the Munchkin VWH Display . . . . . .30
F Status Menu . . . . . . . . . . . . . . . . . . . .31
G Test Mode . . . . . . . . . . . . . . . . . . . . . .31
H To Turn Off Gas to Appliance . . . . . . .32
PART 7 . . . . . . . . . . . . . . . . . . . .34 thru 36
TROUBLESHOOTING
A Munchkin Error Code . . . . . . . . . . . . .34
B Boiler Error . . . . . . . . . . . . . . . . . . . . .34
C Boiler Fault . . . . . . . . . . . . . . . . . . . . .34
PART 8 . . . . . . . . . . . . . . . . . . . .37 thru 41
MAINTENANCE
A Maintenance Procedures . . . . . . . . . .37
B Annual Maintenance . . . . . . . . . . . . . .37
C Condensate Cleaning Instructions . . .37
D Combustion Chamber
Coil Cleaning Instructions . . . . . . . . . .38
E Munchkin Controllers . . . . . . . . . . . . .39