Bell & Gossett A03852C Enhanced Air Separator EAS - Manual (Page 2)

To shut off the vent so that it cannot vent automatically, (only
those without overflow connector installed), screw cap on top
of vent down tight. For normal automatic venting open cap
only about one full turn so that there is a slow release of air. A
fast release of air will allow contaminants or scale to foul the
vent mechanism. The small hole in the side of the cap allows
air to escape with cap in place. When an overflow connector
and tube to a safe drain is used, continuous automatic vent-
ing is provided.
SERVICE INSTRUCTIONS
1. The Enhanced Air Separator should not require servicing. If
the system fluid contains large amounts of contaminants,
the perforated metal diffuser and/or the air coalescing
brush may become contaminated with foreign substances.
The Enhanced Air Separator cap unscrews from the body
for easy cleaning of both the brush and diffuser. When re-
placing the perforated metal diffuser make sure that the
overlap portion of the diffuser is at 90° to the NPT body
connection. The diffuser will have to be held during the
assembly of body and cap to prevent it turning. This can be
done through the NPT connections. Please refer to Figure 3.
2. The #87 or #78 automatic air vent can be replaced by
unscrewing it from the Enhanced Air Separator cap.
OPERATING INSTRUCTIONS
CAUTION: Uncontrolled venting of water can occur
with automatic air vents if foreign material prevents
vent from closing. A No. 113023 overflow connector and
1 /
4
" OD copper tube should be used to direct unwanted
flow to a drain. The 2" NPT size can be piped to a drain
using a flare to 1 /
8
" NPT connector with 1 /
4
" OD copper
tube. Failure to follow these instructions could result in
property damage and/or moderate personal injury.
CAUTION: Contaminants and scale from the system
can foul the automatic air vent operating mechanism.
Keep vent cap closed tight during the system filling to pre-
vent contaminants from running into valve vent mecha-
nism. Failure to follow these instructions could result in
property damage and/or moderate personal injury.
C A U T I O N: Hot venting water can be hazardous.
Avoid contact with venting fluid and only manually
vent when system temperature is below 100°F (37.8°C).
Failure to follow these instructions could result in property
damage and/or personal injury.
C A U T I O N: Corrosion of or leakage from the En-
hanced Air Separator can cause damage or injury.
Periodically inspect the Enhanced Air Separator for signs
of leakage or corrosion. If noted the Enhanced Air Separ-
ator must be replaced. Failure to follow these instructions
could result in property damage and/or moderate personal
injury.
W A R N I N G: Servicing the Enhanced Air Separator
with unit pressurized or at temperature above 100°F
(37.8°C) can cause personal injury. Make sure pressure is
removed from unit and temperature is below 100°F
(37.8°C). Failure to follow these instructions could result in
serious personal injury or death and property damage.
TYPICAL INSTALLATION
FIGURE 1
TYPICAL INSTALLATION
FIGURE 2
FIGURE 3
B&G PRESSURE
REDUCING VALVE
CW FILL
SHUT-OFF
VALVE
B&G RELIEF
VALVE
DIAPHRAGM TYPE
EXPANSION TANK
B&G BOOSTER
B&G TRIPLE
DUTY VALVE
TO
SYSTEM
BOILER
RETURN
OPTIONAL SIDE
OUTLET BOILER
CONNECTION
ENHANCED AIR
SEPARATOR
B&G COMPRESSION TANK
PITCH UP TANK B&G AIRTROL
TANK FITTING
C.W. FILL
B&G PRESSURE REDUCING VALVE
ENHANCED AIR SEPARATOR
TO
SYSTEM
RETURN
OPTIONAL
SIDE OUTLET
BOILER CONNECTION
FLOW
The automatic air vent can be used to automatically or man-
ually vent the hydronic stem. To manually operate the vent,
press down on the vent stem (tire type valve).
B&G RELIEF VALVE
AUTOMATIC
AIR VENT
CAP
BAFFLE
DIFFUSER
WIRE BRUSH
O-RING
BODY
Xylem Inc.
8200 N. Austin Avenue
Morton Grove, Illinois 60053
Phone: (847) 966-3700
Fax: (847) 965-8379
www.xyleminc.com/brands/bellgossett
Bell & Gossett is a trademark of Xylem Inc. or one of its subsidiaries.
© 2013 Xylem Inc. A03852C October 2013