Watts AERCO Benchmark 2.0LN, Operating & Maintenance Instructions

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APPENDIX G
G-4
DIRT TRAP
* 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
P&
T
GAS SUPPLY
HEATING SYSTEM RETURN
* 2
" MANUAL
SHUTOFF VALVE
P&
T
RELIEF VALVE
(TYP
.)
P&
T
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
-739
).
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
MIL
. BTU LOW NOx
GAS FIRED MULTIPLE BOILERS
WITH ZERO SIDE CLEARANCE INSTALLATION
APPD
.
DWN
.BY
SCALE
CZ
NTS
NORTHVALE
, NJ
07647
INTERNATIONAL
, INC
.
021506
SD
-A
-673
TEMPERATURE GAUGE
P&
T
PRESSURE
&
ISOLATION VALVE UNION Y STRAINER
LEGEND
BALANCING VALVE
REV
A
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)
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
.