Pressure Gauge Removal; Replacing The Control Unit; Control Unit Removal Preparations - Worcester Greenstar 4000 Installation And Maintenance Instructions Manual

9.10

Pressure gauge removal

At the rear of the boiler:
1. Release the clip securing the pressure gauge connection [1].
2. Remove the capillary from the support clip [2].
3. Pull the connection down to remove [3].
2.
Fig. 96 Rear view of pressure gauge connection
From the front of the boiler:
1. Release at least two of the retaining clips on the pressure gauge
mount.
2. Pull the pressure gauge forward and down to remove.
1
Fig. 97 Front view of pressure gauge
9.11

Replacing the control unit

Replacement control unit.
▶ The replacement control unit is not supplied with code plug or display
cover panel. These must be removed and refitted to the replacement
control unit.
Preparation before control unit removal.
▶ Loosen the retaining screw and open the cover.
▶ Remove connectors from the PCB on the both terminal strip sides.
– Power supply (power cables) terminal strip (2).
– Low voltage (signal cables) terminal strip (3).
▶ Remove connector for the Key accessory slot [4].
Greenstar 4000 – 6 720 891 162 (2020/09)
3.
0010036650-001
1.
2.
0010036649-001
▶ Remove code plug [5].
1.
2
Fig. 98 Control unit removal preparations
Control unit removal.
▶ Release the locking latches [1] and pull the control unit [2] out of the
cradle.
▶ Remove the display cover panel [3] from the control unit [2].
– Lift up and forwards to release the display cover panel [3].
1
1
2
Fig. 99 Control unit removal
▶ Install the control panel in the reverse order.
– Ensure all parts and connectors are fitted securely in position.
Replacement parts
1
3 4
5
0010035348-001
3
1
2
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