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. INSTALLATION SURVEY . . . . . . . . . . . . . . . .2
D. PLANNING THE LAYOUT . . . . . . . . . . . . . . . .2
E. MASSACHUSETTS INSTALLATIONS . . . . . .2
2. BOILER SET-UP 4
3. WATER PIPING AND CONTROLS 5
A. BOILER SUPPLY AND RETURN . . . . . . . . . . .5
B. SAFETY RELIEF VALVE . . . . . . . . . . . . . . . . .6
C. PIPING FOR ZONED SYSTEMS . . . . . . . . . .7
D. EXPANSION TANK . . . . . . . . . . . . . . . . . . . . .8
E. INDIRECT-FIRED WATER HEATER . . . . . . . .8
F. FREEZE PROTECTION . . . . . . . . . . . . . . . . . .8
4. VENTING, VENTILATION AND
AIR INLET 9
A. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
B. WALL THIMBLE . . . . . . . . . . . . . . . . . . . . . . .9
C. ROOF TERMINATIONS . . . . . . . . . . . . . . . .11
D. CONDENSATE TRAP INSTALLATION . . . . .11
E. VENT PIPE INSTALLATION . . . . . . . . . . . . .12
F. AIR INLET PIPE INSTALLATION . . . . . . . . .12
G. AIR FOR VENTILATION . . . . . . . . . . . . . . . .12
H. BOILER REMOVAL FROM COMMON
VENTING SYSTEM . . . . . . . . . . . . . . . . . . .12
5. GAS PIPING 14
6. ELECTRICAL 15
A. WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
B. ZONED SYSTEM WIRING . . . . . . . . . . . . . .15
C. CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . .15
D. SEQUENCE OF OPERATION . . . . . . . . . . . .16
7. START-UP PROCEDURES 19
A. COMPLETING THE INSTALLATION . . . . . .19
B. CONTROL DESCRIPTIONS . . . . . . . . . . . . .22
C. ADJUSTMENT OF GAS PRESSURE
REGULATOR . . . . . . . . . . . . . . . . . . . . . . . . .22
D. CHECKING BURNER INPUT . . . . . . . . . . . . .22
E. CHECK-OUT PROCEDURE . . . . . . . . . . . . . .22
8. TROUBLESHOOTING 24
A. SHUT-DOWN CAUSED BY PILOT OUTAGE,
PRESSURE SWITCH OR FLAME ROLL-OUT
SAFETY SHUT-OFF SWITCH . . . . . . . . . . . .24
B. TROUBLESHOOTING GUIDES . . . . . . . . . .24
C. MEASURING SUCTION PRESSURE . . . . . .24
9. MAINTENANCE 27
A. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . .28
B. DAILY (WITH BOILER IN USE) . . . . . . . . . . .28
C. WEEKLY (WITH BOILER IN USE) . . . . . . . . .28
D. MONTHLY (WITH BOILER IN USE) . . . . . . .28
E. ANNUALLY (BEFORE START OF HEATING
SEASON) . . . . . . . . . . . . . . . . . . . . . . . . . . .28
10. BOILER DIMENSIONS & RATINGS 31
11. REPAIR PARTS 32
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