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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. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . .11
B. CHIMNEY VENTING . . . . . . . . . . . . . . . . . . .11
C. DIRECT EXHAUST
HORIZONTAL VENTING- . . . . . . . . . . . . . . .11
D. DIRECT EXHAUST
VERTICAL VENTING . . . . . . . . . . . . . . . . . .14
E. BOILER REMOVAL FROM
COMMON VENTING SYSTEM . . . . . . . . . .15
5. GAS PIPING 16
6. ELECTRICAL 18
A. WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
B. ZONED SYSTEM WIRING . . . . . . . . . . . . . .18
C. CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . .18
D. SEQUENCE OF OPERATION . . . . . . . . . . . .19
7. START-UP PROCEDURES 22
A. COMPLETING THE INSTALLATION . . . . . . .22
B. CONTROL DESCRIPTIONS . . . . . . . . . . . . .25
C. ADJUSTMENT OF GAS PRESSURE
REGULATOR . . . . . . . . . . . . . . . . . . . . . . . . .25
D. CHECKING BURNER INPUT . . . . . . . . . . . . .25
E. CHECK-OUT PROCEDURE . . . . . . . . . . . . . .26
8. TROUBLESHOOTING 28
A. SHUT-DOWN CAUSED BY PILOT OUTAGE,
PRESSURE SWITCH OR FLAME ROLL-OUT
SAFETY SHUT-OFF SWITCH . . . . . . . . . . . .28
B. TROUBLESHOOTING GUIDES . . . . . . . . . .28
C. MEASURING SUCTION PRESSURE . . . . . .28
9. MAINTENANCE 32
A. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . .33
B. DAILY (WITH BOILER IN USE) . . . . . . . . . . .33
C. WEEKLY (WITH BOILER IN USE) . . . . . . . . .33
D. MONTHLY (WITH BOILER IN USE) . . . . . . .33
E. ANNUALLY (BEFORE START OF HEATING
SEASON) . . . . . . . . . . . . . . . . . . . . . . . . . . .34
10. BOILER DIMENSIONS & RATINGS 35
11. REPAIR PARTS 36
A. BLOCK/BASE/FLOOR PAN
JACKET/FLUE COLLECTOR . . . . . . . . . . . . .36
B. BASE/BURNERS/MANIFOLD . . . . . . . . . . . .37
TABLE OF CONTENTS
TABLE OF CONTENTS