User Manual

APPENDIX G
G-2
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-739).
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
DIRT TRAP
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
SD
NTS
021506
AERCO
SD-A-672
TEMPERATURE GAUGE
P&T
PRESSURE &
BALANCING VALVE ISOLATION VALVE
UNION
Y STRAINER
LEGEND
BENCHMARK 2 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
B
AT MAXIMUM BTU/HR INPUT, MAINTAIN MINIMUM GAS PRESSURE AT 5.3" W.C. (FM GAS TRAIN); 5.5" W.C.(IRI). MAX. GAS PRESSURE=2.0 PSIG. (SEE NOTE 6)
DRIP TRAP
* 2" MANUAL SHUTOFF VALVE
MAINTAIN A REGULATED 5.3" W.C. (FM), 5.5 W.C. (IRI) GAS PRESSURE AT MAX BTU/HR INPUT
GAS SUPPLY
(TO BOILER)
(SEE NOTE 7)
Diagram 1
7) A GAS REGULATOR IS MANDATORY FOR THE STATE OF MASSACHUSETTS, REGARDLESS OF SUPPLY PRESSURE.
SEE DIAGRAM 1