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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 VAINE 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 the 3 hex head
screws (see A in drawing) towaM the backside of
the valve to allow pressure
water to bleed out.
Catch the water with a rag.
DISASSEMBLY
To remove
a pal1 or group
of palts,
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 and disc for
scratches,
chips or wear.
NOTE: If replacement
is needed,
be sure to use
the current replacement
part.
ASSEMBLY
Be sure all pm_s are in place and in the proper
position. Lubricate ALLo-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 o-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) TO SERVICE POSI-
TION.
Tighten
the
screws
using
a criss-cross
pattern.
If a torque
wrench
is available,
torque
to
30-40 inch pounds.
valve0am
.\.
&gear
flow plug (backwash
SEE NOZZLE
ASSEMBLY SERVICE,
SECTION 3
II
and fast rinse flow
rate control)
rotor & disc
rotor seal
drain seal
nozzle &
venturi seal
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.
23
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