FV669 Rev. G 06/22/22
Page 7
STEP 4
Place valve head with diaphragm kit back onto valve body.
Before tightening the locking ring, make sure the strap wrench
and locking ring are completely dry so that the strap wrench has
the best grip possible on the locking ring.
Tighten locking ring
back to original position with strap wrench (supplied) by turning
clockwise.
STEP 5
Turn control stop back on by turning counter-clockwise using a
flat head screw driver.
Orifice
Diaphragm Kit
Manifold Stem
Volume
Control Ring
Diaphragm Replacement and Cleaning (when necessary)
STEP 1
Turn off control stop using a flat head screw driver turning
clockwise (See Figure 16 above). Then, use the electronic
override button to flush the water out of the flush valve.
STEP 2
Before loosening the locking ring, make sure the strap wrench
and locking ring are completely dry so that the strap wrench has
the best grip possible on the locking ring.
Mark down Locking ring original position relative to valve body
with tape or marker. Uninstall valve head by loosen locking ring
(See Figure 16 above) using strap wrench (supplied) turning
counter-clockwise.
STEP 3B - Replace Diaphragm Kit
Slide out existing diaphragm kit off manifold stem. If the o-rings
are worn, replace them with the new o-rings provided in the
diaphragm repair kit. Then replace the old diaphragm kit with a
new diaphragm kit (of the same flow rate) into the valve body,
carefully orienting the orifice opposite of the control stop. (There
is no need to replace the Volume Control Ring unless it is missing
or broken)
STEP 3A - Cleaning Diaphragm Kit
Slide out existing diaphragm kit off manifold stem. Wash
diaphragm and orifice thoroughly with water. Slide cleaned
diaphragm back on to manifold stem orienting the orifice opposite
of the control stop. If cleaning diaphragm and orifice do not
resolve issue, follow step 3B.
Do not to damage or enlarge orifice. Doing so will result in
incorrect flush rate.
Figure 17
