AERCO BMK 2.0 LN Natural Gas (SN G-11-1861 and above) - Manual (Page 153)

GF-123
Benchmark 2.0LN Low NOx Boiler
Appendix G
OMM-0046_0E I nstallation, Operation and Maintenance Manual Piping Drawings
PR1 08/20/12 AERCO International Inc.● 100 Oritani Dr. ● Blauvelt, NY 10913. ● Ph: 800-526-0288 Page 153 of 170
*
CONDENSATE
DRAIN TRAP
1-
1/
2"
NPT
DRAIN CONN
.
BACKFLOW PREVENTER
DIAPHRAGM TYPE EXPANSION TANK
LINE SIZE
BYPASS
SUPPLY WATER HEATING SYSTEM SUPPLY PRESSURE REDUCING FILL VALVE
P
&
T
SYSTEM PUMP
CHECK VALVE (TYP
.)
AUTOMATIC AIR VENT
AIR SEPARATOR
GAS SUPPLY
HEATING SYSTEM RETURN
*
2"
MANUAL
SHUTOFF VALVE
P
&
T
RELIEF VALVE
(TYP
.)
P
&
T
5)
THIS IS A TYPICAL INSTALLATION DRAWING
.
LOCAL CODES AND AUTHORITIES SHOULD BE CONSULTED
.
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
.
4)
LOCATE WATER INLET AND OUTLET FITTINGS
(i.
e.
UNIONS
, ELBOWS
, ETC
.)
A MINIMUM OF
6''
FROM BOILER
CONVENIENT FLOOR DRAIN
.
RELIEF VALVE SHOULD BE PIPED VERTICALLY TO A HEIGHT
18
''
ABOVE FLOOR
.
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
.
2)
SHELL DRAIN VALVE AND CONDENSATE DRAIN TRAP SHOULD BE ARRANGED TO PERMIT THE FLUIDS TO DRAIN FREELY
, BY GRAVITY
, TO A
NOTES
:
DATE DATE
AERCO BENCHMARK
2.
0
MIL
. BTU LOW NOx
GAS FIRED MULTIPLE BOILERS
WITH ZERO SIDE CLEARANCE INSTALLATION APPD
.
DWN
.BY
SCALE
JK NTS
NORTHVALE
, NJ
07647
INTERNATIONAL
, INC
.
102307
SD
-A
-673
TEMPERATURE GAUGE
P &
T
PRESSURE
&
ISOLATION VALVE UNION Y STRAINER
LEGEND
BALANCING VALVE
REV
C
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
.
7)
A GAS REGULATOR IS MANDATORY FOR THE STATE OF MASSACHUSETTS
, REGARDLESS OF SUPPLY PRESSURE
.
SEE DIAGRAM
1
DRIP TRAP
*
2"
MANUAL
SHUTOFF VALVE
MAINTAIN A REGULATED 4.
0"
W
.C
. (
NAT
. GAS
, FM
)/
5.
0"
W
.C
. (
NAT
. GAS
, IRI
)
GAS PRESSURE AT MAX BTU
/HR INPUT
GAS SUPPLY
(TO BOILER
)
(SEE NOTE
7)
Diagram
1
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)
DRIP TRAP
P
&
T
P
&
T