Owner manual
APPENDIX G: PIPING DRAWINGS
PR2: 05/09/12 Page 137 of 152
Benchmark 1.5LN Low NOx Boiler
Operation and Maintenance Manual
OMM-0041_0D
GF-120
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
* CONDENSATE
DRAIN TRAP
1-1/2" NPT
DRAIN CONN.
BACKFLOW PREVENTER
DIAPHRAGM TYPE
EXPANSION TANK
LINE
SIZE
BYPASS
SUPPLY
WATER
HEATING
SYSTEM
SUPPLY
PRESSURE
REDUCING
FILL VALVE
P&T
SYSTEM
PUMP
CHECK
VALVE
(TYP.)
AUTOMATIC
AIR VENT
AIR
SEPARATOR
GAS SUPPLY
HEATING
SYSTEM
RETURN
* 1-1/2" MANUAL
SHUTOFF
VALVE
P&T
RELIEF
VALVE (TYP.)
P&T
5) THIS IS A TYPICAL INSTALLATION DRAWING. LOCAL CODES AND AUTHORITIES SHOULD BE CONSULTED.
FITTINGS TO PREVENT INTERFERENCE WITH REMOVAL OF BOILER PANELS AND COVERS. ALL PIPING AND
ELECTRIC CONNECTIONS (SERVICE SWITCHES, CONDUIT BOXES) SHOULD LIKEWISE BE 6" AWAY FROM SIDE PANELS.
4) LOCATE WATER INLET AND OUTLET FITTINGS (i.e. UNIONS, ELBOWS, ETC.) A MINIMUM OF 6'' FROM BOILER
CONVENIENT FLOOR DRAIN. RELIEF VALVE SHOULD BE PIPED VERTICALLY TO A HEIGHT 18'' ABOVE FLOOR.
1) FOR ACTUAL SIZES AND LOCATIONS OF PIPING AND OTHER CONNECTIONS TO THE BOILER, SEE DIMENSIONAL DRAWING (AP-A-739).
3) ALL (*) ITEMS ARE INCLUDED SEPARATELY IN SHIPMENT FROM FACTORY.
2) SHELL DRAIN VALVE AND CONDENSATE DRAIN TRAP SHOULD BE ARRANGED TO PERMIT THE FLUIDS TO DRAIN FREELY, BY GRAVITY, TO A
NOTES:
DATE
DATE
AERCO
BENCHMARK 1.5 MIL. BTU LOW NOx
GAS FIRED MULTIPLE BOILERS
WITH ZERO SIDE CLEARANCE INSTALLATION
APPD.
DWN.BY
SCALE
JK
NTS
NORTHVALE, NJ 07647
INTERNATIONAL, INC.
102307
SD-A-737
TEMPERATURE GAUGE
P&T
PRESSURE &
ISOLATION VALVE
UNION
Y STRAINER
LEGEND
BALANCING VALVE
REV
C
6) WHEN AVAILABLE GAS PRESSURE IS GREATER THAN 2.0 PSIG, A LOCK-UP STYLE REGULATOR MUST BE INSTALLED
DOWNSTREAM OF THE 2" MANUAL SHUTOFF VALVE TO BRING THE GAS PRESSURE DOWN TO 2.0 PSIG.
7) A GAS REGULATOR IS MANDATORY FOR THE STATE OF MASSACHUSETTS, REGARDLESS OF SUPPLY PRESSURE.
SEE DIAGRAM 1
DRIP TRAP
* 1-1/2" MANUAL
SHUTOFF
VALVE
MAINTAIN A REGULATED
4.0" W.C. (FM), 4.2 W.C. (IRI)
GAS PRESSURE AT MAX
BTU/HR INPUT
GAS SUPPLY
(TO BOILER)
(SEE NOTE 7)
Diagram 1
AT MAXIMUM BTU/HR INPUT,
MAINTAIN MINIMUM GAS PRESSURE AT
4.0" W.C.(FM GAS TRAIN); 4.2" W.C. (IRI).
MAX. GAS PRESSURE = 2.0 PSIG. (SEE NOTE 6)
DRIP TRAP
P&T
P&T