PB MI85 Series, Installation, Operation & Maintenance Manual, Page: 2 / 43

USING THIS MANUAL 1
A. INSTALLATION SEQUENCE . . . . . . . . . . . . .1
B. SPECIAL ATTENTION BOXES . . . . . . . . . . . .1
1. PREINSTALLATION 2
A. ACCESSIBILITY CLEARANCES . . . . . . . . . . .2
B. CLEARANCE FROM COMBUSTIBLE
CONSTRUCTION . . . . . . . . . . . . . . . . . . . . . .2
C. AIR FOR COMBUSTION AND
VENTILATION . . . . . . . . . . . . . . . . . . . . . . . . .2
D. INSTALLATION SURVEY . . . . . . . . . . . . . . . .5
E. PLANNING THE LAYOUT . . . . . . . . . . . . . . . .5
2. BOILER SET-UP 6
3. WATER PIPING AND CONTROLS 7
A. BOILER SUPPLY AND RETURN . . . . . . . . . . .7
B. SAFETY RELIEF VALVE . . . . . . . . . . . . . . . . .8
C. PIPING FOR ZONED SYSTEMS . . . . . . . . . .9
D. EXPANSION TANK . . . . . . . . . . . . . . . . . . . .10
E. INDIRECT-FIRED WATER HEATER . . . . . . .10
F. FREEZE PROTECTION . . . . . . . . . . . . . . . . .10
4. VENTING 11
A. VENT PIPING AND CHIMNEY . . . . . . . . . . .11
B. INTEGRAL DRAFT HOOD . . . . . . . . . . . . . .11
C. VENT DAMPER INSTALLATION –
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . .11
D. BOILER REMOVAL FROM COMMON
VENTING SYSTEM . . . . . . . . . . . . . . . . . . .13
5. GAS PIPING 14
6. ELECTRICAL 16
A. WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
B. ZONED SYSTEM WIRING . . . . . . . . . . . . . .16
C. CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . .16
D. SEQUENCE OF OPERATION . . . . . . . . . . . .19
7. START-UP PROCEDURES 21
A. COMPLETING THE INSTALLATION . . . . . .21
B. CONTROL DESCRIPTIONS . . . . . . . . . . . . .24
C. ADJUSTMENT OF GAS PRESSURE
REGULATOR . . . . . . . . . . . . . . . . . . . . . . . . .24
D. CHECKING BURNER INPUT . . . . . . . . . . . . .24
E. CHECK-OUT PROCEDURE . . . . . . . . . . . . . .25
8. TROUBLESHOOTING 26
A. SHUT-DOWN CAUSED BY PILOT OUTAGE,
BLOCKED VENT SHUT-OFF SWITCH OR
FLAME ROLL-OUT SAFETY SHUT-OFF
SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
B. TROUBLESHOOTING GUIDES . . . . . . . . . .26
9. MAINTENANCE 29
A. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . .30
B. DAILY (WITH BOILER IN USE) . . . . . . . . . . .30
C. WEEKLY (WITH BOILER IN USE) . . . . . . . . .30
D. MONTHLY (WITH BOILER IN USE) . . . . . . .30
E. ANNUALLY (BEFORE START OF HEATING
SEASON) . . . . . . . . . . . . . . . . . . . . . . . . . . .30
10. BOILER DIMENSIONS & RATINGS 32
11. REPAIR PARTS 33
A. BASE/COMBUSTIBLE FLOOR PAN . . . . . . .33
B. MANIFOLD, GAS VALVE & PILOT . . . . . . . .34
C. BLOCK/DRAFT HOOD & JACKET . . . . . . . .36
D. CONTROLS/CIRCULATOR/VENT
DAMPER & CONVERSION KITS . . . . . . . . .38
TABLE OF CONTENTS
TABLE OF CONTENTS