FV486 Rev. D 7/16/18
Page 5
Removing the Old Solenoid
1. Turn off water supply to flush valve at shut off (S.O.).
2. Cycle the valve once – flush it to relieve pressure holding the valve
closed.
3. Remove the main valve body cap (Item #1) from the flush valve (Item
#6) using a wrench.
4. Remove the plastic diaphragm cover (Item #2) from the top of the
diaphragm assembly.
5. Remove the diaphragm assembly (Item #3) from the flush valve
(Item #6).
6. Using a screwdriver, remove the riser tube (Item #5) from the sole-
noid (Item #7).
7. Remove the RetroFlush sensor assembly (Item #9) from the flush
valve handle port using a wrench on the handle nut (Item #11).
8. Remove the solenoid retaining clip (Item #8) and
gently pull the solenoid (Item #7) out of the housing.
Note
: Pay special attention to the position of the retaining clip
ends to ensure proper reassembly into the proper slots.
9. Disconnect the sensor cable connector from the solenoid.
Installing the New Solenoid
ZRK Dual Flush Retrofit Kit
Solenoid Replacement Instructions
5. Reinstall the riser tube (Item #5) onto the solenoid (Item #7). Tighten
snug with screwdriver, do not overtighten.
6. Reinstall the original diaphragm assembly (Item #3)onto the flush
valve (Item #6).
7. Reinstall the original plastic diaphragm cover (Item #2) on top of the
diaphragm assembly (Item #3).
8. Reinstall the main valve body cap (Item #1) onto the flush valve (Item
#6) using a wrench. Tighten properly.
9. Remove battery cover (Item #10) from RetroFlush sensor assembly
(Item #9) with the hex key wrench provided and press reset button
located on the sensor module case. Reinstall cover (Item #10).
10.Turn on water supply and cycle flush valve for normal operation.
Adjust stop valve for optimal flow to the fixture.
1. Connect the cable connector on the solenoid (Item #7) to the sensor
cable connector.
2. Lightly lubricate the solenoid O-ring seal with silicone grease provided
to prevent damage while reassembling the unit. Insert the solenoid
(Item #7) into the housing and install the solenoid retaining clip (Item
#8). When installed properly, the end of the solenoid housing isfree
to rotate.
Note
: Be careful not to crimp the battery wires while
inserting the solenoid into the housing.
3. Reinstall the RetroFlush sensor assembly (Item #9) onto the flush
valve using a wrench. Be sure the solenoid inlet (threaded hole) is
facing upward when installed in the flush valve. If not, remove Item
#9 and rotate the solenoid for proper position.
4. Remove old O-ring (Item #4) from the upper part of the riser tube
(Item #5). Install new quad ring (Item #4) onto the riser tube (Item
#5) making sure the quad ring is not twisted. Lightly lubricate the
quad ring with the silicone grease provided.
