Owner's manual
GF-123 Benchmark 2.0LN Low NOx Boiler Appendix G
OMM-0046_0E Installation, Operation and Maintenance Manual Piping Drawings
PR1 08/20/12 AERCO International Inc.● 100 Oritani Dr. ● Blauvelt, NY 10913. ● Ph: 800-526-0288 Page 151 of 170
5) THIS IS A TYPICAL INSTALLATION DRAWING. LOCAL CODES AND AUTHORITIES SHOULD BE CONSULTED.
CONVENIENT FLOOR DRAIN. RELIEF VALVE SHOULD BE PIPED VERTICALLY TO A HEIGHT 18'' ABOVE FLOOR.
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.
1) FOR ACTUAL SIZES AND LOCATIONS OF PIPING AND OTHER CONNECTIONS TO THE BOILER, SEE DIMENSIONAL DRAWING (AP-A-797).
3) ALL (*) ITEMS ARE INCLUDED SEPARATELY IN SHIPMENT FROM FACTORY.
NOTES:
AIR
SEPARATOR
AUTOMATIC
AIR VENT
1-1/2" NPT
DRAIN CONN.
LINE
SIZE
BYPASS
BACKFLOW PREVENTER
DIAPHRAGM TYPE
EXPANSION TANK
WATER
SUPPLY
* CONDENSATE
DRAIN TRAP
P&T
PRESSURE
REDUCING
FILL VALVE
CHECK
VALVE
(TYP.)
HEATING
SYSTEM
SUPPLY
SYSTEM
PUMP
P&T
RELIEF
VALVE (TYP.)
HEATING
SYSTEM
RETURN
* 2" MANUAL
SHUTOFF
VALVE
GAS SUPPLY
2) SHELL DRAIN VALVE AND CONDENSATE DRAIN TRAP SHOULD BE ARRANGED TO PERMIT THE FLUIDS TO DRAIN FREELY, BY GRAVITY, TO A
4) LOCATE WATER INLET AND OUTLET FITTINGS (i.e. UNIONS, ELBOWS, ETC.) A MINIMUM OF 6'' FROM BOILER
NORTHVALE, NJ 07647
INTERNATIONAL, INC.
APPD.
DWN.BY
SCALE
DATE
DATE
CZ
NTS
102307
AERCO
SD-A-672
TEMPERATURE GAUGE
P&
T
PRESSURE &
BALANCING VALVE
ISOLATION VALVE
UNION
Y STRAINER
LEGEND
BENCHMARK 2.0 MIL. BTU LOW NOx
GAS FIRED BOILER
MULTIPLE UNIT INSTALLATION
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.
REV
C
AT MAXIMUM BTU/HR INPUT,
MAINTAIN MIN. NATURAL GAS
PRESS. AT 4.0" W.C.(FM GAS TRAIN)/
5.0" W.C.(IRI GAS TRAIN);
MAX. GAS PRESSURE
= 2.0 PSIG (SEE NOTE 6).
7) A GAS REGULATOR IS MANDATORY FOR THE STATE OF MASSACHUSETTS, REGARDLESS OF SUPPLY PRESSURE.
SEE DIAGRAM 1
DRIP TRAP
DRIP TRAP
* 2" MANUAL
SHUTOFF
VALVE
MAINTAIN A REGULATED
4.0" W.C. (NAT. GAS, FM)/
5.0" W.C. (NAT. GAS, IRI)
GAS PRESSURE AT MAX
BTU/HR INPUT
GAS SUPPLY
(TO BOILER)
(SEE NOTE 7)
Diagram 1