SERVICE TECH. INFORMATION
SECTION 5
24
5B.
ROTARY VALVE SERVICE
BEFORE WORKING ON THE VALVE, TURN
OFF THE WATER SUPPLY AND DISCON-
NECT FROM ELECTRICAL POWER. TO RE-
LIEVE PRESSURE:
- - 3 VALVE BYPASS: Close the inlet valve and
open a soft water faucet. Then close the outlet
valve and open the bypass valve.
- - GALAXY SPECIAL BYPASS: Slide the bypass
valve stem to bypass position. Loosen the 3 hex
head screws (see Key nr 91 on page 31) toward
the backside of the valve to allow pressure water
to bleed out. Catch the 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 the
valve.
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 parts are in place and in the proper
position. Lubricate ALL o-rings and seals with
Food grade (e.g. 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 POSITION. Tighten the
screws using a criss-cross pattern. If a torque
wrench is available, torque to 3 - 4.5 Nm
motor
switch
motor plate
cam & gear
o-ring seals
wave washer
rotor & disc
o-ring
rotor seal
drain seal
see Nozzle
assembly
service,
page 15
nozzle & venturi seal
seal
wear--strip
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.
