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Inspection and maintenance
9
Inspection and maintenance
DANGER
Electrical shock!
▶ Before working on the electrics, the main power supply must be
switched off.
NOTICE
Deformation due to heat!
If the temperature is too high, the insulation (EPP) in the indoor unit
deforms.
▶ When carrying out brazing work at the cylinder, protect the insulation
with a heat resistant cloth or damp cloth.
▶ Only use original spare parts!
▶ Refer to the spare parts list when ordering spare parts.
▶ Replace removed gaskets and O-rings with new ones.
The tasks described below must be carried out during an inspection.
In case of renovation (exchange installation) and a previously dirty
system, more frequent cleaning/service may be necessary in the first
weeks after installation.
Display activated alarm
▶ Check the alarm log (instructions for the control device).
Only use Bosch Group original spare parts with this appliance. Non
Bosch Group original spare parts will invalidate the guarantee (if
applicable) and any warranty.
▶ A comprehensive list of appliance spares can be found on the website
www.worcester-bosch.co.uk/spares
9.1
Particle and magnetite filter
WARNING
Strong magnet!
Can be harmful to pacemaker wearers.
▶ Do not clean the filter or check the magnetite indicator if you have a
pacemaker.
The particle filter prevents particles and contamination from entering
the heat pump. Over time, the filter can become blocked and must be
cleaned.
To clean the filter, the system does not need to be emptied. The filter and
shut-off valve are integrated.
As the filter is installed vertically, the PC0 pump needs to be running
when the lever is closed. Ensure the compressor or additional heater are
not running when the lever is closed to avoid damaging components.
This can be done by entering the function test and running the PC0
pump. Then follow the steps below. Do not enter the function test if the
compressor is running!
34
Cleaning the strainer
▶ Close the valve (1).
▶ Unscrew the cap (manually) (2).
▶ Take out the strainer and clean it by running water over it or by
pressure cleaning.
▶ Reinstall the strainer. For proper assembly, make sure that the guide
bumps fit into the recesses in the valve.
1
1.
2.
3
Fig. 39 Cleaning the strainer
▶ Screw the cap back on (tighten handtight).
▶ Open the valve (4).
Check and clean the particle filter annually.
Check and clean the magnetite filter (if fitted)
Check and clean the magnetite filter 1-2 times a year, but directly after
installation and commissioning the filter should be checked and cleaned
more frequently. See the instruction that is supplied with the filter for
correct procedure.
Check the temperatures of the sensors and record the values
Check temp sensors:
▶ T0
▶ T1
▶ TW1
▶ TC0
▶ TC1
Check fault history
Check system magnetic filter if there is one fitted.
9.2
DHW expansion vessel & PRVs
Check the operation of the TPRV and the 6 bar PRV, ensure they are
safely working and water is transported safely through the tundish and
D2 pipework. Check the pressure setting is correct in the DHW
expansion vessel.
Pre plumbed cylinder – 6 721 852 928 (2023/04)
2
4
2.
1.
6 720 805 915-01.1I
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