Installation Guide

FV838 Rev. A 10/5/2023
Page 6
Diaphragm Kit
Manifold Stem
Volume
Control Ring
Orice
4. Place the valve head with the diaphragm kit back onto the valve
body. Ensure that both the strap wrench and locking ring are dry
for a better grip. Tighten the locking ring to its original position
using the supplied strap wrench by turning it clockwise.
Diaphragm Replacement and Cleaning (when necessary)
1. Turn off control stop using a flat head screwdriver turning
clockwise.Afterward,utilizethemanualoverridebuttontoush
wateroutoftheushvalve.
3B.Removetheexistingdiaphragmkitfromthemanifoldstem.If
theo-ringsshowsignsofwearordamage,replacethemwith
the new ones provided in the diaphragm repair kit.
 Installanewdiaphragmkit(withmatchingowrate)intothe
valvebody,ensurethattheoriceispositionedoppositethe
control stop. Take care to align it properly.
 NotethatunlesstheVolumeControlRingismissingorbroken,
there is no need to replace it.
3. Remove the existing diaphragm kit from the manifold stem.
Thoroughlywashthediaphragmandoriceusingwater.
 Installthecleaneddiaphragmbackintothevalvebody,ensurethat
theoriceisfacingthecorrectorientation.Forthecorrectorice
orientation,Refertotheretrotinstallationinstructionsection.
 Iftheissuepersistsaftercleaning,proceedtostep3B.
Donottodamageorenlargeorice.Doingsowillresultin
incorrectushrate.
2.Before loosening the locking ring, ensure that both the strap
wrench and locking ring are completely dry. This will optimize
the grip of the strap wrench on the locking ring.
Use tape or a marker to mark the original position of the locking
ring in relation to the valve body.
 Usingthesuppliedstrapwrench,loosenthelockingringonthe
valveheadbyturningitcounter-clockwise.Ifthestrapwrench
isunabletoloosenthelockingring,youmayusealargewrench
ontheatsofthelockingringtoloosenit.
5. Turn the control stop back on by turning counter-clockwise using
aatheadscrewdriver.
Locking
Ring
Control Stop
Manual override Button
Sensor Angle Adjustment (when necessary)
2.Before loosening the locking ring, ensure that both the strap
wrench and locking ring are completely dry. This will optimize
the grip of the strap wrench on the locking ring.
Use tape or a marker to mark the original position of the locking
ring in relation to the valve body.
 Usingthesuppliedstrapwrench,loosenthelockingringonthe
valveheadbyturningitcounter-clockwise.Ifthestrapwrench
isunabletoloosenthelockingring,youmayusealargewrench
ontheatsofthelockingringtoloosenit.
1.Turn off control stop using a flat head screwdriver turning
clockwise.Afterward,utilizethemanualoverridebuttontoush
wateroutoftheushvalve.
3. Adjust the sensor angle by rotating the valve head
4.Before tightening the locking ring, ensure that both the strap
wrench and locking ring are completely dry. This will optimize
the grip of the strap wrench on the locking ring.
 Usingthesuppliedstrapwrench,tightenthelockingringbackto
its original position by turning it clockwise.
5. Turn the control stop back on by turning counter-clockwise using
aatheadscrewdriver.