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SECTION 5 SERVICE TECH. INFORMATION
I I
5B. ROTARY VALVE SERVICE
Before working on the valve, turn off the water
supply and disconnect from electrical power.
TO RELIEVE PRESSURE:
-3 VALVE BYPA,_S.. Close the inlet valve and (;)pen a
soft water faucet. Then close the outlet valve and
(:)pen the bypass valve.
-,fEARS SPE(3AL BYPASS: Slide the bypass valve
stem to bypass position. Loosen the 3 hex head
screws (see A in drawing) toward the backside of the
valve to allow pressure water to bleed out. Catch the
water with a rag.
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 the switch as shown, with the lever
toward the cam.
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 (:)-rings, seals and gaskets for wear or
defects.
Inspect the bottom surface of the rotor and disc 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 ()-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 2 ()-rings and the wave washer onto the
rotor and disc. Then center the rotor and disc, 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)
SEE NOZZLE
ASSEMBLY
SERVICE,
SECTION 3
switch {_ "-"-'>_'_._
_,_/_ alve cam
_._.._.... &gear
• _..._
flow plug (backwash
and fast rinse flow
rate control)
rotor & disc
wear strip
€
o-ring
rotor seal
drain seal
nozzle &
venturi seal
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