Jaclo ½" thermostatic valve - J-THVC12 - Manual (Page 8)

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| PG 8 THERMOSTATIC WALL VALVE
› CAUTION: DO NOT ATTEMPT TO SERVICE THE THERMOSTATIC VALVE UNLESS VOLUME CONTROL
VALVES ARE SHUT OFF. OTHERWISE SERIOUS CHECK VALVE / STOP DAMAGE WILL OCCUR.
› CAUTION: The temperature limit stop (5) and dial (8) must be re-set - see limit stop and temperature
setting before replacing trim.
› CAUTION: After performing any routine maintenance, the temperature limit stop and dial must be reset.
See limit stop and temperature setting (Page 5) & dial pointer (Page 6).
1 ›
First - Shut off the volume control valve (s). (See pg. 4)
2 ›
Second - Shut off the check valve / stops by rotating each one half a turn (180°), until the OFF arrows
point in the direction of the water flow (toward the center of the valve). (See Fig.2 Page 5).
3 › Open a lower volume control valve slightly to relieve system pressure and drain.
4 › Remove handle, dial assembly, limit stops, front plate sleeve with insert and the stop rings.
5 › Remove cartridge locknut and pull cartridge out. Rotate slightly to aid removal. Flush any debris from
screen.
6 › To re-install cartridge, apply silicone grease to ‘O’ rings and insert in valve, rotating slightly. Orient
it with its notch up (12 o’clock position - see Fig.2 Page 5). Secure with locknut (3), using a 1-1/4"
wrench (do not overtighten).
7 › Slide plastic stop ring (4) over the cartridge such that stop ring’s notch is aligned to the notch on
cartridge (12 o’clock position - see Fig. 2 Page 5).
8 › Do not pressurize yet. Make sure the volume control valves are shut. This is a critical step to
eliminate damage to check stop seals.
9 › Open check stops and check for leaks. Volume control valves can now be open.
1 › Shut off hot and cold water main supply valves. Remove handle, dial and front plate (18).
2 › Open a lower volume control valve slightly to relieve system pressure and drain.
3 › Unscrew the locknuts (12). Pull the check-stops (11) out while rotating slightly. Flush the cavities to
remove any debris.
4 › Check, clean and if necessary replace ‘O’ rings and/or the entire check stop. Grease lightly with
silicone valve grease. Make sure seat (17) moves freely.
5 › Insert check-stops (11) rotating while pushing and turn with OPEN arrows pointing in the direction of
the water flow (toward the center of valve). Stop will resist seating all the way in. This is normal.
6 › Screw locknuts (12) until they bottom seating check stops.
7 › Most important - Close the volume control valve (s). Restore hot and cold water and check for leaks.
DIAL POINTER, TRIM & HANDLE INSTALLATION
VALVE MAINTENANCE
THERMO CARTRIDGE REMOVAL & INSTALLATION Refer to Fig. 1, Page 2