Bell & Gossett A07176C Number 97 Automatic Air Vent - Manual (Page 2)

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.
© 2012 Xylem Inc. A07176C May 2012
1. Install the No. 97 automatic air vent in a hydronic piping system or in hydronic
system components where air is expected to accumulate and must be removed for
proper hydronic system operation.
2. The No. 97 air vent is a float type and must be installed in the vertical position with
the vent connection pointing up.
OPERATING INSTRUCTIONS
The No. 97 automatic air vent can be used for automatic or manual venting of hydronic
systems.
1. To manually operate, press down on the vent stem.
2. For normal automatic venting, open cap one full turn for a slow release of air. A fast
release of the air will allow dirt or scale to foul the vent mechanism. The small hole
in the side of the cap allows air to escape.
3. To shutoff automatic air vent, screw cap down tight.
SERVICE INSTRUCTIONS
There is no service required for the automatic air vent.
CAUTION: Uncontrolled venting of water can occur with the automatic air
vent if dirt, scale, pipe compound or other foreign material fouls the
operating mechanism. Keep vent cap closed during system filling to prevent dirt from
running into vent mechanism. Failure to follow these instructions could result in
property damage and/or moderate personal injury.
CAUTION: Hot venting can be hazardous. Avoid contact with venting fluid
and only manually vent when system temperature is below 100°F (38°C).
Failure to follow these instructions could result in property damage and/or personal
injury.
CAUTION: Corrosion or leakage of vents can cause damage or injury.
Periodically inspect the air vents for signs of leakage or corrosion. If noted,
the vent must be replaced. Failure to follow these instructions could result in property
damage and/or moderate personal injury.