APPENDIX G
G-1
5) THIS IS A TYPICAL INSTALLATION DRAWING. LOCAL CODES AND AUTHORITIES SHOULD BE CONSULTED.
2) SHELL DRAIN VALVE AND CONDENSATE DRAIN TRAP SHOULD BE ARRANGED TO PERMIT THE FLUIDS TO DRAIN
HEIGHT 18'' ABOVE FLOOR.
4) LOCATE WATER INLET AND OUTLET FITTINGS (i.e. UNIONS, ELBOWS, ETC.) A MINIMUM OF 6'' FROM BOILER
ELECTRIC CONNECTIONS (SERVICE SWITCHES, CONDUIT BOXES) SHOULD LIKEWISE
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.
BE 6'' AWAY FROM SIDE PANELS.
NOTES:
SINGLE UNIT INSTALLATION
GAS FIRED BOILER
BENCHMARK 2.0 MIL. BTU LOW NOx
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
RELIEF VALVE (TYP.)
PRESSURE
REDUCING
FILL VALVE
HEATING
SYSTEM
RETURN
CHECK
VALVE
(TYP.)
HEATING
SYSTEM
SUPPLY
SYSTEM
PUMP
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)
* 2" MANUAL
SHUTOFF
VALVE
DIRT TRAP
GAS SUPPLY
FREELY, BY GRAVITY, TO A CONVENIENT FLOOR DRAIN. RELIEF VALVE SHOULD BE PIPED VERTICALLY TO A
FITTINGS TO PREVENT INTERFERENCE WITH REMOVAL OF BOILER PANELS AND COVERS. ALL PIPING AND
NORTHVALE, NJ 07647
INTERNATIONAL, INC.
APPD.
DWN.BY
SCALE
DATE
DATE
CZ
NTS
102307
AERCO
SD-A-671
TEMPERATURE GAUGE
P&T
PRESSURE &
BALANCING VALVE
ISOLATION VALVE
UNION
Y STRAINER
LEGEND
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
SEE DIAGRAM 1
7) A GAS REGULATOR IS MANDATORY FOR THE STATE OF MASSACHUSETTS, REGARDLESS OF SUPPLY PRESSURE.
* 2" MANUAL
SHUTOFF
VALVE
(TO BOILER)
Diagram 1
GAS SUPPLY
(SEE NOTE 7)
MAINTAIN A REGULATED
4.0" W.C. (NAT. GAS, FM)/
5.0" W.C. (NAT. GAS, IRI)
GAS PRESSURE AT MAX
BTU/HR INPUT
DRIP TRAP
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