Bell & Gossett A91591 Number 98 High Capacity Air Vent 1/2″ Female NPT Connection Operational Limits - Manual (Page 2)

INST ALLATION INSTRUCTIONS
(cont'd)
The No. 98 automatic air vent must be installed in a vertical
position. They are typically installed on the manifolds, on the ris-
ing main and in the points of the circuit where air bubbles are
concentrated and must be vented.
OPERA TING & SERVICE INSTRUCTIONS
The No. 98 automatic air vent valve is designed to enable the
inspection of the internal mechanism.
The accessibility to the moving parts that control the air outlet is
obtained by simply removing the upper cover. The body is also
detachable from the lower part connected to the piping,
It is recommended to install a shut-off valve before the No. 98
device to simplify any maintenance operations.
© COPYRIGHT 2006
INDUSTRIES, INC.
PRINTED IN U.S.A. 4-06
Bell & Gossett
8200 N. Austin A venue
Morton Grove, IL 60053
Phone: (847) 966-3700
http://www.bellgossett.com
W ARNING: State of California Residents
This pr oduct contains a chemical known by the State
of California to cause cancer. This products contains a
chemical known by the State of California to cause birth
defects or other reproductive harm.
CAUTION: The installation of the vent in places sub-
ject to freezing is not recommended. In the case of
installation in locations that cannot be inspected, it is recom-
mended to replace the upper caps with the safety hygro-
scopic caps, code 59681. To allow for the venting of the air
during normal operation, the upper cap must be loose (tight
in the hygroscopic version).
CAUTION: Uncontr olled venting of water can occur
with automatic air vents if foreign material prevents
vent from closing. Unwanted flow should be directed to a
drain. Failure to follow these instructions could result in
property damage and/or moderate personal injury.
CAUTION: All safety instructions and cautions apply .
Please review these instructions (as mentioned under
INSTALLATION INSTRUCTION Section) before operating
and/or servicing this product.