AERCO BMK 3.0 LN Natural Gas July 2011 - Manual (Page 110)

APPENDIX G
G-4
NORTHVALE, NJ 07647 INTERNATIONAL, INC.
APPD. DWN.BY SCALE
DATE DATE
SD
072606
AERCO
SD-A-691
C
REV.
BENCHMARK 3 MIL. BTU LOW NOx
GAS FIRED BOILER MULT. INSTALLATION
WITH ZERO SIDE CLEARANCE
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.
PRESSURE REDUCING FILL VALVE
DIAPHRAGM TYPE EXPANSION TANK
BACKFLOW PREVENTER
LINE SIZE
BYPASS
HEATING SYSTEM SUPPLY
SUPPLY WATER
SYSTEM PUMP
CHECK VALVE (TYP.)
* 2" MANUAL SHUTOFF VALVE
RELIEF VALVE (TYP.)
ISOLATION VALVE BALANCING VALVE TEMPERATURE GAUGE
LEGEND
Y STRAINER UNION PRESSURE &
P&T
DRIP TRAP
7) EACH CONDENSATE PORT CAN BE PIPED INDIVIDUALLY TO MAIN DRAIN.
(SEE NOTE 7)
* CONDENSATE DRAIN TRAP
HEATING SYSTEM RETURN
P&T
GAS SUPPLY
P&T
P&T
8) A GAS REGULATOR IS MANDATORY FOR THE STATE OF MASSACHUSETTS, REGARDLESS OF SUPPLY PRESSURE.
SEE DIAGRAM 1
* 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
NOTES:
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)