APPENDIX G
G-3
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:
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
JK
NTS
102307
AERCO
SD-A-674
TEMPERATURE GAUGE
P&T
PRESSURE &
BALANCING VALVE
ISOLATION VALVE
UNION
Y STRAINER
LEGEND
BENCHMARK 2.0 MIL. BTU LOW NOx
GAS FIRED BOILER 3-UNIT INSTALLATION
(2 ZERO-SIDE & 1 SEPARATE)
* 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
* 2" MANUAL
SHUTOFF
VALVE
P&T
RELIEF
VALVE (TYP.)
REV
C
DOWNSTREAM OF THE 2" MANUAL SHUTOFF VALVE TO BRING THE GAS PRESSURE DOWN TO 2.0 PSIG.
6) WHEN AVAILABLE GAS PRESSURE IS GREATER THAN 2.0 PSIG, A LOCK-UP STYLE REGULATOR MUST BE INSTALLED
7) A GAS REGULATOR IS MANDATORY FOR THE STATE OF MASSACHUSETTS, REGARDLESS OF SUPPLY PRESSURE.
SEE DIAGRAM 1
AT MAXIMUM BTU/HR INPUT,
MAINTAIN MINIMUM NATURAL GAS PRESSURE AT
4.0" W.C.(FM GAS TRAIN)/5.0" W.C.(IRI GAS TRAIN);
MAX. GAS PRESSURE = 2.0 PSIG. (SEE NOTE 6)
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
P&T
DRIP TRAP
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