Riello Array AR 3000, Installation And Operation Manual

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SHUTDOWN
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APPENDIX
APPENDIX G - BOILER INSTALLATION (EXAMPLE DRAWINGS)
Array AR 3000 / AR 4000 Single Unit Installation
SECONDARY
SUPPLY SENSOR (MANDATORY)
MAKE-UP WATER
PRESSURE REDUCING VALVE
EXPANSION TANK
SYSTEM CIRCULATOR
SYSTEM RETURN
SECONDARY SYSTEM SUPPLY
DIRT TRAP
MANUAL SHUTOFF VALVE
GAS PRESSURE REGULATOR
MAINTAIN A RECOMMENDED 8" W.C. PRESSURE (MINIMUM 4.0" W.C.) AT HIGH-FIRE INPUT
GAS SUPPLY
CONDENSATE DRAIN PIPE
RELIEF VALVES DRAIN PIPE
SUPPLY (Boiler Outlet)
RETURN (Boiler Inlet)
COMBUSTION AIR
FLUE
AIR ELIMINATOR
MANDATORY BOILER STRAINER
BACKFLOW PREVENTER
PRESSURE GAUGE
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
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 20" 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
10 ft recommended