AERCO BMK 3.0 LN Natural Gas July 2011 - Manual (Page 108)

APPENDIX G
G-2
NORTHVALE, NJ 07647 INTERNATIONAL, INC.
APPD. DWN.BY SCALE
DATE
MC
DATE
SD
061506
AERCO
SD-A-682
C
REV.
BENCHMARK 3 MIL. BTU LOW NOx
GAS FIRED BOILER
MULTIPLE UNIT INSTALLATION
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 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-802). 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
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.
P&T
AUTOMATIC AIR VENT
AIR SEPARATOR
1-1/2" NPT DRAIN CONN.
HEIGHT 18'' ABOVE FLOOR. 3) ALL (*) ITEMS ARE INCLUDED SEPARATELY IN SHIPMENT FROM FACTORY.
BE 6'' AWAY FROM SIDE PANELS.
NOTES:
* CONDENSATE DRAIN TRAP
PRESSURE REDUCING FILL VALVE
DIAPHRAGM TYPE EXPANSION TANK
BACKFLOW PREVENTER
LINE SIZE
BYPASS
HEATING
SYSTEM SUPPLY
SUPPLY WATER
SYSTEM PUMP
CHECK VALVE (TYP.)
HEATING SYSTEM RETURN
* 2" MANUAL SHUTOFF VALVE
RELIEF VALVE (TYP.)
ISOLATION VALVE BALANCING VALVE TEMPERATURE GAUGE
LEGEND
Y STRAINER UNION PRESSURE &
P&T
DRIP TRAP
GAS SUPPLY
P&T
7) EACH CONDENSATE PORT CAN BE PIPED INDIVIDUALLY TO MAIN DRAIN.
(SEE NOTE 7)
* 2" MANUAL SHUTOFF VALVE
(TO BOILER)
Diagram 1
GAS SUPPLY
(SEE NOTE 8)
MAINTAIN A REGULATED 4" W.C. GAS PRESSURE AT MAX BTU/HR INPUT
DRIP TRAP
8) 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 3.5" W.C. (FM GAS TRAIN)/4.0" W.C. (IRI GAS TRAIN) MAX GAS PRESSURE = 2.0 PSIG. (SEE NOTE 6)