Munchkin HIGH EFFICIENCY HEATER with the "925" Controller User Manual
Page 3
TABLE OF CONTENTS
3
TABLE OF CONTENTS
PART 1 . . . . . . . . . . . . . . . . . . . . . .4 thru 8
GENERAL INFORMATION
A
How It Operates . . . . . . . . . . . . . . . . . .4
B
Munchkin Ratings and Dimensions . . .4
C
Pre-installation Requirements . . . . . . .8
D
Pressure Relief Valve . . . . . . . . . . . . . .9
PART 2 . . . . . . . . . . . . . . . . . . . . .9 thru 11
ELECTRICAL
A
Electrical Connection . . . . . . . . . . . . . .9
PART 3 . . . . . . . . . . . . . . . . . . . .12 thru 13
GAS CONNECTION
A
Gas Connection . . . . . . . . . . . . . . . . . .12
B
Gas Piping . . . . . . . . . . . . . . . . . . . . . .12
C
Gas Table . . . . . . . . . . . . . . . . . . . . . . .12
PART 4 . . . . . . . . . . . . . . . . . . . .14 thru 21
VENTING
A
Approved Venting Materials . . . . . . . .14
B
Venting the Munchkin . . . . . . . . . . . . .15
C
Longer Vent Runs . . . . . . . . . . . . . . . .17
D
Heater Removal from a
Common Vent System . . . . . . . . . . . .18
E
Condensate Removal . . . . . . . . . . . . .18
PART 5 . . . . . . . . . . . . . . . . . . . .22 thru 33
PIPING
A
Hydronic piping with
Circulators or Zone Valves . . . . . . . . .22
B
Circulator Sizing . . . . . . . . . . . . . . . . .23
C
Fill and Purge Heating System . . . . . .24
D
Piping Illustrations . . . . . . . . . . . . . . .25
PART 6 . . . . . . . . . . . . . . . . . . . .34 thru 37
START UP PROCEDURES
A
Sequence of operation . . . . . . . . . . . .34
B
Items to be checked before
lighting the Munchkin . . . . . . . . . . . . .34
C
Lighting Instructions . . . . . . . . . . . . . .35
D
Operating Instructions . . . . . . . . . . . .35
E
Adjusting the Temperature
on the Munchkin Display . . . . . . . . . .36
F
Status Menu . . . . . . . . . . . . . . . . . . . .36
G
Test Mode . . . . . . . . . . . . . . . . . . . . . .37
H
To Turn Off Gas to Appliance . . . . . . .37
PART 7 . . . . . . . . . . . . . . . . . . . .38 thru 40
TROUBLESHOOTING
A
Munchkin Error Code . . . . . . . . . . . . .38
B
Boiler Error . . . . . . . . . . . . . . . . . . . . .38
C
Boiler Fault . . . . . . . . . . . . . . . . . . . . .38
PART 8 . . . . . . . . . . . . . . . . . . . .40 thru 44
MAINTENANCE
A
Maintenance Procedures . . . . . . . . . .41
B
Before Each Heating Season . . . . . . .41
C
Condensate Cleaning Instructions . . .41
D
Combustion Chamber
Coil Cleaning Instructions . . . . . . . . . .42
E
Munchkin Controller . . . . . . . . . . . . . .43
F
Components Diagrams . . . . . . . . .44–45