Riello Array AR 3000 User Manual

52
SHUTDOWN
52
APPENDIX
ARRAY AR 3000 / AR 4000 Multiple Boiler Installation
EXPANSION
TANK
COMMON PIPE DIAMETER MUST BE SIZED FOR FOR FLOW RATES LESS THAN 4.0 FT/SEC. COMMON PIPE LENGTH BETWEEN THE CLOSE TEES MUST BE 3 TO 5 TIMES ITS DIAMETER
D
MAINTAIN A RECOMMENDED 8" PRESSURE (MINIMUM 4.0") AT MAXIMUM BTU/HR INPUT
DIRT TRAP
B
C
MANDATORY BOILER STRAINER
A
Detail B
AIR ELIMINATOR
SYSTEM CIRCULATOR
SECONDARY SYSTEM SUPPLY
SECONDARY SYSTEM RETURN
MAKE-UP WATER
BACKFLOW PREVENTER
PRESSURE REDUCING VALVE
PRESSURE GAUGE
CONDENSATE DRAIN PIPE
SUPPLY (Boiler Outlet)
RETURN (Boiler Inlet)
FLUE
COMBUSTION AIR
GAS PRESSURE REGULATOR
MANUAL SHUTOFF VALVE
GAS SUPPLY
10 FEET RECOMMENDED
Detail C
RELIEF VALVES DRAIN PIPE
Detail D
Detail A
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: GAS REGULATOR (AND IS REQUIRED WHEN SUPPLY PRESSURE IS GREATER THAN 20" WC). REGULATOR
SHOULD BE LOCATED APPROX. 10 FEET FROM BOILER.
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.
SYSTEM SENSOR (MANDATORY)

Riello Array AR 3000 Specifications

General

Brand	Riello
Model	Array AR 3000
Category	Boiler
Language	English