Bell & Gossett HS 218B Dura-Stat Thermostatic Module - Manual

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8200 N. Austin Avenue
Morton Grove, Illinois 60053
Phone: (847) 966-3700
Fax: (847) 965-8379
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© 2012 Xylem Inc. HS-218B October 2012 Part No. 510666
INSTRUCTION MANUAL
HS218B
Dura-Stat
™
Thermostatic Module
For Barnes & Jones
Thermostatic Traps,
Model 122, 1 /2”
CAUTION: TURN OFF STEAM SUPPLY
VALVE AND ALLOW RADIATOR
TO COOL BEFORE REPLACING
MODULE.
1 Remove the cover from the trap.
Then, remove the old thermostatic
element from the trap body. Discard the
old element.
IMPORTANT: After removing the old
element, be sure to remove any scale or
debris from the trap body interior,
especially in the area around the
machined seat.
2 Install the replacement Dura-Stat
Module in the Model 122 trap body by
inserting the module into the machined
seat. Then, place the retainer spring
included with the Dura-Stat Module on
top of the module as shown to the right.
3 Securely (leak tight) re-install the
cover on the trap body, taking care to
ensure that the retainer spring and
module remain squarely in the trap
body. Open the radiator supply valve.
COVER (SAVE)
OLD ELEMENT
(DISCARD)
1
2
3
NEW DURA-STAT
MODULE
RETAINER
SPRING
!