60
SHUTDOWN
60
APPENDIX
APPENDIX
ARRAY AR 1000 / AR 1500 / AR 2000 Multiple Boiler Installation
Detail D
PRESSURE
REGULATOR
MANUAL
SHUTOFF
VALVE
GAS FILTER
(MANDATORY)
Detail A
Detail B
Detail C
EXPANSION
B
TANK
NOTES:
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
9. IN CASE OF COMMON VENT PIPE, AN ADDITIONAL SEPARATE CONDENSATE DISCHARGE LINE MUST BE ADDED AT THE FOOT OF THE VERTICAL COMMON STACK.
THIS LINE MUST BE SYPHONED ADEQUATELY, ACCORDING TO THE CALCULATED MAXIMUM FLUE PRESSURE IN THE COMMON VENT PIPE
10. IF THE RETURN PIPING METHOD IS DIFFERENT FROM THE ONE SHOWN, THERE MAY BE SOME MINOR FLOW IMBALANCES.
6. RECOMMENDED: GAS REGULATOR (AND IS REQUIRED WHEN SUPPLY PRESSURE IS GREATER THAN 13.5" WC).
5. PIPING SHOWN IS PRIMARY/SECONDARY.
4. INSTALL A MINIMUM OF 6 DIAMETERS OF OF STRAIGHT PIPE UP AND DOWNSTREAM OF ALL CLOSELY SPACED TEES.
3. INSTALL A MINIMUM OF 12 DIAMETERS OF STRAIGHT PIPE UPSTREAM OF ALL CIRCULATORS.
2. INSTALLATIONS MUST COMPLY WITH ALL LOCAL CODES.
1. THIS DRAWING IS MEANT TO DEMONSTRATE SYSTEM PIPING CONCEPT ONLY.
GAS SUPPLY
COMMON PIPE DIAMETER
MUST BE SIZED FOR LESS
THAN 4.0 ft/sec COMMON
PIPE LENGHT BETWEEN THE
CLOSE TEES MUST BE 3 TO
5 TIMES ITS DIAMETER
C
MAINTAIN A
RECOMMENDED 8"
PRESSURE (MINIMUM
4") AT MAXIMUM
BTU/HR INPUT
AIR ELIMINATOR
SUPPLY
SENSOR
(MANDATORY)
SYSTEM
CIRCULATOR
SECONDARY
SYSTEM
SUPPLY
SECONDARY
SYSTEM
RETURN
MAKE-UP
WATER
BACKFLOW
PREVENTER
PRESSURE
REDUCING
VALVE
PRESSURE
GAUGE
RELIEF VALVES
DRAIN PIPE
CONDENSATE
DRAIN PIPE
SUPPLY
RETURN
FLUE
COMBUSTION AIR
A
D
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