Checking/Replacing The Motor Of The 3-Way Valve; Removing The Pump - Worcester Greenstar 4000 Installation And Maintenance Instructions Manual

9.4

Checking/replacing the motor of the 3-way valve

(appliances fitted with diverter valve accessory)
Variant without screws
Checking 3-way valve motor.
▶ Carry out function check of 3-way valve motor in Function check
menu.
– Service menu > Function check > Activate test
valve > Hot water.
Detaching the motor.
▶ Set the 3-way valve to mid position.
– Service menu > Settings > Special function > 3-WV mid. pos.>
Yes.
The 3-way valve remains at the middle position for approx. 15 minutes.
▶ Detach the motor in the sequence shown.
– Unplug the plug.
– Remove the lock clip.
– Turn the motor anti-clockwise and pull it up and out.
– Pull the motor up to disengage from ball head and remove.
4.
Fig. 89 Detaching the motor from the 3-way valve (variant without
screws)
Installing the motor.
▶ Install the motor in the sequence shown.
– Align the motor with the ball head and push down to engage.
– Turn the motor clockwise as far as it will go.
– Refit the lock clip.
– Connect the plug.
1) When the Function Check menu is entered only Burner will be visible for the first
10 seconds, after this period of time the other components that can be tested
will appear in the menu. Components such as HC1 pump, DHW circulation pump
and Solar pump will show if connected to the control board.
Greenstar 4000 – 6 720 891 162 (2020/09)
1)
> 3-way
2.
3.
1.
0010036141-001
1.
1.
Fig. 90 Installing the motor in the 3-way valve (variant without screws)
9.5

Removing the pump

▶ Unplug the electrical connections [4].
▶ Release the ratchet connection [1] between pump and heat
exchanger assembly.
▶ Loosen the securing screws [3].
▶ Remove pump assembly [2].
3
4
3
3
Fig. 91 Removing the pump
▶ Install the pump in reverse order.
Replacement parts
3.
2.
4.
0010036140-001
1
2
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