Bell & Gossett HS 115B Model 508 Hygroscopic Air Vent - Manual

INSTRUCTION MANUAL
HS-115
REVISION B
Hoffman Specialty ®
Model 508
Hygroscopic Air Vent
• Before using product, read and understand instructions.
• 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.
Failure to follow these cautions could cause property damage or personal injury.
WAR NING
CAUT ION
CAUTION !
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
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
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
Drying Time
PTFE provides lubricity so that care must be exercised not to overtighten joints.