AS0715-E
Page
16
Parts Replacement
General Information
Familiarise yourself with the parts replacement
procedures and component parts thoroughly before
attempting any repair.
Insure that the unit is in the bypass position and
relieve the system pressure before attempting any
repair procedure.
WARNING! Disconnect all electrical power to the
unit before attempting and repair procedure.
Required Tools
The following tools are required to perform routine
maintenance on this valve:
Phillips Screwdriver
Needle Nose Pliers
Adjustable Wrench
Small Standard Screwdriver
Timer Assembly Replacement
1. Disconnect all electrical power to the control.
2. Place the bypass valve into "bypass" position.
3. Remove the front dust cover from the timer
assembly.
4. Relieve the system pressure by using a
screwdriver to press down on the drain plunger
opening the drain line.
5. Disconnect the solenoid cable from the solenoid
coil.
6. Remove the four (4) head mounting screws.
7. Lift the timer assembly away from the valve
body.
8. Follow these steps in reverse to reinstall the
timer assembly.
Note: Prior to re-instalment insure that the
main return spring is centred over the main
diaphragm.
Timer Motor Replacement
1. Disconnect all electrical power to the control.
2. Remove both the front dust cover and the rear
timer cover.
3. Disconnect the two (2) wire nuts from the timer
motor leads.
4. Remove the two (2) motor mount screws.
5. Lift the motor away from the timer assembly.
6. Follow these steps in reverse to reinstall the
timer assembly.
Main Diaphragm Replacement
1. Disconnect all electrical power to the control.
2. Place the bypass valve into the "bypass"
position.
3. Remove the front dust cover from the timer
assembly.
4. Relieve the system pressure by using a screw-
driver to press down on the drain plunger
opening the drain line.
5. Disconnect the solenoid cable from the solenoid
coil.
6. Remove the four (4) head mounting screws.
7. Lift the timer assembly away from the valve
body.
8. Remove the c-clip from the centre of the
diaphragm.
9. Lift the diaphragm away from the body stem
assembly.
7. Follow these steps in reverse to reinstall the
timer assembly.
Note: Prior to re-instalment insure that the
main return spring is centred over the main
diaphragm and that the outside edges of the
main diaphragm are tucked into the valve
body.
Drain Plunger Replacement
1. Disconnect all electrical power to the control.
2. Place the bypass valve into "bypass" position.
3. Remove the front dust cover from the timer
assembly.
4. Relieve the system pressure by using a
screwdriver to press down on the drain plunger
opening the drain line.
5. Remove the retaining screw located below the
"Time of Day" gear.
6. Lift the retainer down and away from the timer
assembly.
7. Press down on the drain plunger to remove it
from the valve body.
8. Inspect the plunger o-rings and centre cup for
wear.
9. Clean out the plunger orifice in valve body.
10. Use a Dow 111 Silicone based lubricant to
lightly lubricate the plunger o-rings and the valve
body orifice.
11. Follow these steps in reverse to re-install drain
plunger.