49
1.
Set the ON/OFF switch to OFF or 0.
2.
Undo both screws on the underside of the front
panel.
3.
!
Please note
The cables between the programming unit
and the wiring chamber can sustain dam-
age.
Take care when removing the front panel
and observe the length of the cable (approx.
60 cm tolerance).
Put the front panel to one side and ensure it cannot
fall over.
4.
Carefully remove the top panel (see page 42).
Overview of electrical components
See page 29 onwards.
Overview of internal components, Vitocal 300-G
Fig. 25
Example (type BW 302.CS140)
1
Wiring chamber
2
Safety high pressure switch, stage 1
3
Safety high pressure switch, stage 2
(only type BW 302.CS090 to BW 302.CS230)
4
Pressure transmitter, high pressure
5
Pressure transmitter, low pressure
6
Electronic expansion valve (EEV)
Repairs
Removing the front panel and top panel
5789 986 GB
Maintenance
