Checking/Replacing The Motor Of The 3-Way Valve; Replacing The Optional 3-Way Valve; Following Inspection/Maintenance - Bosch Worcester Greenstar 8000 Series Installation And Maintenance Instructions Manual

Replacement parts
1. Unplug the plug.
2. Unscrew the union nut.
Fig. 100 Unplugging the plug and unscrewing the union nut
1. Remove the 2 screws.
2. Remove the air/gas ratio control valve.
Fig. 101 Removing the gas control valve
▶ Install the air/gas ratio control valve in reverse order, and check the
gas/air ratio.
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1.
2.
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2.
1.
0010007251-001
9.6

Checking/replacing the motor of the 3-way valve

▶ Check the motor in the Menu > Function check > Activate test > 3-way
valve.
▶ Check/replace the motor of the 3-way valve in the Service menu >
Special function > 3-WV mid. pos. > Yes.
1. Pull out the motor.
2. Press the cable retaining clip.
3. Unplug the plug.
Fig. 102 Removing the motor of the 3-way valve
9.7

Replacing the optional 3-way valve

▶ Remove the screws.
▶ Pull out the 3-way valve.
▶ Press the cable retaining clip.
▶ Unplug the plug.
Fig. 103 Removing the 3-way valve
9.8

Following inspection/maintenance

▶ Re-tighten all the threaded connections that have been released.
▶ Restart the appliance.
▶ Check tightness of all joints.
▶ Check the gas/air ratio.
▶ Fit the combustion casing, side-, top panels and front cover.
Greenstar 8000 Style – 6720883855 (2019/01)
0010017783-001