Bell & Gossett HS 115B User Manual

INSTRUCTION MANUAL

!

HS-115

REVISION B

Hoffman Specialty

®

Model 508
Hygroscopic Air Vent

1/8” NPT Male Connection

Maximum Working Pressure:

Steam: 15 psig (1 bar)
Hot Water: 50 psig (3.5 bar)

Maximum Working Temperature: Hot Water 230˚F (110˚C)
Brass Body – Chrome plated

Drying Time

Temperature ˚F (˚C) 100 (38) 120 (49) 140 (60) 160 (71) 175 (79) 195 (91) 212 (100)
Drying Time - Hours 6 5 2-1/2 1-1/2 1 1/2 1/4

Replacement Cartridge

The cartridge (knob) portion of the valve contains the hygroscopic discs. The
cartridge can be easily replaced without draining the heating unit. The discs can
deteriorate over time when exposed to unfiltered or hard water. Replacement of
the hygroscopic cartridge is recommended at least every two years. Cartridges
may need to be replaced more often if installed in aluminum radiators.

Replacement Cartridge Part Number: 600059

CAUTION

• Before using product, read and understand instructions.

CAUTION

WARNING

• Save these instructions for future reference.

• All work must be performed by qualified personnel trained in the proper application,
installation, and maintenance of systems in accordance with all applicable codes
and ordinances.

• Hot venting can be hazardous. Avoid contact with venting fluid and only manually vent when
system temperature is below 100˚F (38˚C).

• Overtightening and breakage can occur with the use of PTFE pipe joint compounds.
PTFE provides lubricity so that care must be exercised not to overtighten joints.

Failure to follow these cautions could cause property damage or personal injury.

OPERATION

Manual Discharge Position:

Unscrew the knob counterclockwise one turn. This
position is used mainly when filling the unit/system.

Automatic Discharge Position:

Turn the knob clockwise until it seats completely.
Valve will vent air automatically.

Replacement Cartridge:

Remove cartridge by unscrewing knob counter­clockwise. The small ball inside the body prevents
water from escaping.

Xylem Inc.

8200 N. Austin Avenue
Morton Grove, Illinois 60053
Phone: [phone]
Fax: [phone]
www.xyleminc.com/brands/bellgossett

Bell & Gossett is a trademark of Xylem Inc. or one of its subsidiaries.
© 2012 Xylem Inc. HS-115B November 2012 Part No. 510901