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SECTION 5 SERVICE TECH. INFORMATION
5B. ROTARY VALVE SERVICE
Before working on the valve, turn off the water
supply and disconnect from electrical power. TO
RELIEVE PRESSURE:
- - 3 VALVE BYPASS: Close the inlet valve and open
a soft water faucet. Then close the outlet valve and
open the bypass valve.
--SEARS SPECIAL BYPASS: Slide the bypass
valve stem to bypass position. Loosen 3 hex head
screws toward the back side of the valve to allow
pressure water to bleed out. Catch water with a
rag.
DISASSEMBLY
To remove a part or group of parts, refer to the
valve drawing. A common screwdriver or nut
driver, Phillips screwdriver and pliers are the only
tools needed to completely disassemble.
SERVICING THE VALVE
Inspect all o-rings, seals and gaskets for wear or
defects.
Inspect the bottom surface of the rotor for
scratches, chips or wear.
NOTE: If replacement is needed, be sure to use the
current replacement part.
ASSEMBLY
Be sure all parts are in place and in the proper
position. Lubricate ALL o-rings and seals with
FDA approved silicone grease. To install the rotor
seal, first place the seal into the valve groove,
rounded side down (see cross-section). Apply a
light coating of silicone grease to the seal's crossing
ribs. Then, carefully center the wear strip on the
seal, and push it downward onto the seal.
Install the nozzle and venturi seal and drain seal.
Assemble wave washer bearing, the wave washer,
and 2 o-rings onto the rotor top shaft. Then center
the rotor in the valve body, on the rotor seal.
Lower the cover onto the valve body and rotor
shaft. Then install the cover holding screws. Before
tightening the screws, install the valve cam and
gear. Then, turn the rotor (clockwise only) to
service position. Tighten the screws using a criss-
cross pattern. If a torque wrench is available,
torque to 30-40 inch pounds.
Lubricate the gear on the motor, and the valve cam
gear with Molykote grease, or other high quality
gear lubricant.
Be sure to orient switch as shown, with lever
toward the cam.
motor
motor plate
(_assembled
view
rotor seal
_''O-. drain seal
_/ nozzle & venturi seal
sensor -i!
housing " "
_ _._ turbine support
See _ turbine
Nozzle
assembly
service,
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