AERCO BMK 3.0 LN Natural Gas July 2011 - Manual (Page 107)

APPENDIX G
G-1
AIR SEPARATOR AUTOMATIC AIR VENT
LINE SIZE
BYPASS BACKFLOW PREVENTER
DIAPHRAGM TYPE EXPANSION TANK
WATER SUPPLY
PRESSURE REDUCING FILL VALVE
CHECK VALVE (TYP.)
HEATING
SYSTEM SUPPLY
SYSTEM PUMP
P&T
RELIEF VALVE (TYP.)
HEATING SYSTEM RETURN
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)
* 2" MANUAL SHUTOFF VALVE
GAS SUPPLY
TEMPERATURE GAUGE
P&T
PRESSURE & BALANCING VALVE ISOLATION VALVE UNION Y STRAINER
LEGEND
AERCO
SD MC
BENCHMARK 3 MIL. BTU LOW NOx
SINGLE UNIT INSTALLATION
SCALE DWN.BY APPD.
SD-A-681
INTERNATIONAL, INC. NORTHVALE, NJ 07647
061506
DATE DATE
GAS FIRED BOILER
REV.
C
DRIP TRAP
* CONDENSATE DRAIN TRAP
1-1/2" NPT DRAIN CONN.
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
FITTINGS TO PREVENT INTERFERENCE WITH REMOVAL OF BOILER PANELS AND COVERS. ALL PIPING AND
FREELY, BY GRAVITY, TO A CONVENIENT FLOOR DRAIN. RELIEF VALVE SHOULD BE PIPED VERTICALLY TO A 1) FOR ACTUAL SIZES AND LOCATIONS OF PIPING AND OTHER CONNECTIONS TO THE BOILER, SEE DIMENSIONAL DRAWING (AP-A-802).
ELECTRIC CONNECTIONS (SERVICE SWITCHES, CONDUIT BOXES) SHOULD LIKEWISE
4) LOCATE WATER INLET AND OUTLET FITTINGS (i.e. UNIONS, ELBOWS, ETC.) A MINIMUM OF 6'' FROM BOILER 2) SHELL DRAIN VALVE AND CONDENSATE DRAIN TRAP SHOULD BE ARRANGED TO PERMIT THE FLUIDS TO DRAIN 5) THIS IS A TYPICAL INSTALLATION DRAWING. LOCAL CODES AND AUTHORITIES SHOULD BE CONSULTED.
BE 6'' AWAY FROM SIDE PANELS.
3) ALL (*) ITEMS ARE INCLUDED SEPARATELY IN SHIPMENT FROM FACTORY. HEIGHT 18'' ABOVE FLOOR.
NOTES: 7) EACH CONDENSATE PORT CAN BE PIPED INDIVIDUALLY TO MAIN DRAIN.
(SEE NOTE 7)
DRIP TRAP
GAS SUPPLY
* 2" MANUAL SHUTOFF VALVE
Diagram 1
8) A GAS REGULATOR IS MANDATORY FOR THE STATE OF MASSACHUSETTS, REGARDLESS OF SUPPLY PRESSURE,
SEE DIAGRAM 1
MAINTAIN A REGULATED 3.5" W.C. (NAT. GAS, FM/ 4.0" W.C. (NAT. GAS, IRI/GAS PRESSURE AT MAX BTU/HR INPUT
(TO BOILER)
(SEE NOTE 8)