59
SHUTDOWN
59
APPENDIX
APPENDIX
APPENDIX H - BOILER INSTALLATION (EXAMPLE DRAWINGS)
− ARRAY AR 1000 / AR 1500 / AR 2000 Single Unit Installation
−
COMMON PIPE DIAMETER MUST BE
SIZED FOR FLOW RATES LESS THAN
4.0 FT/SEC. COMMON PIPE LENGTH
BETWEEN THE CLOSE TEES MUST BE
3 TO 5 TIMES ITS DIAMETER
MAINTAIN ARECOMMENDED
8" W.C. PRESSURE (MINIMUM
4.0" W.C.) AT HIGH-FIRE INPUT
SUPPLY SENSOR
(MANDATORY)
EXPANSION TANK
SECONDARY
SYSTEM
RETURN
DIRT TRAP
MANUAL
SHUTOFF
VALVE
GAS PRESSURE
REGULATOR
GAS
SUPPLY
CONDENSATE
DRAIN PIPE
RELIEF VALVES
DRAIN PIPE
SUPPLY
(Boiler Outlet)
RETURN
(Boiler Inlet)
COMBUSTION AIR
FLUE
10 ft recommended
MANDATORY
BOILER
STRAINER
SYSTEM
CIRCULATOR
AIR ELIMINATOR
PRESSURE
GAUGE
PRESSURE
REDUCING
VALVE
SECONDARY
SYSTEM
SUPPLY
BACKFLOW
PREVENTER
MAKE-UP
WATER
NOTES:
1. THIS DRAWING IS MEANT TO DEMONSTRATE SYSTEM PIPING CONCEPT ONLY.
2. INSTALLATIONS MUST COMPLY WITH ALL LOCAL CODES.
3. INSTALL A MINIMUM OF 12 DIAMETERS OF STRAIGHT PIPE UPSTREAM OF ALL CIRCULATORS.
4. INSTALL A MINIMUM OF 6 DIAMETERS OF OF STRAIGHT PIPE UP AND DOWNSTREAM OF ALL CLOSELY
SPACED TEES.
5. PIPING SHOWN IS PRIMARY/SECONDARY.
6. RECOMMENDED: (AND REQUIRED WHEN SUPPLY PRESSURE IS GREATER THAN 13.5" W.C.): GAS
PRESSURE REGULATOR (LEVER-ACTING, POSITIVE-LOCKUP TYPE WITH OVER-PRESSURE
PROTECTION (INTERNAL RELIEF).
7. MANDATORY: BOILER STRAINER (20 MESH OR FINER).
8.
THE CONDENSATE DRAIN TUBE MUST PITCH AWAY FROM THE BOILER
(1/4" SLOPE PER FOOT) AND MUST NEVER REDUCE ITS DIAMETER DOWNSTREAM.
GAS FILTER
(MANDATORY)
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