5
x
Control
34
FA ROTEX A1 B0 - 10/2007
7.
Loosen fixing screw of the cable duct holder with Allan key 6 mm, but do not unscrew completely (fig. 5-8).
8.
Remove the fixing screws of the boiler control panel with wrench SW 8 (fig. 5-9). Remove the control panel.
Installation (observe sequence)
1.
Insert the boiler control panel into the holder. Insert and tighten the fixing screws.
2.
Tighten the fixing bolt for the cable duct holder.
3.
Place all sensor and connecting cables into the cable ducts of the control panel. Ensure the correct cable routing through the
strain relief plates.
4.
Insert all connectors on the switchboard PCB. The connectors are colour and shape-coded to avoid confusion. Do not force
the connector!
5.
Mount the control panel cover.
6.
Screw in the pressure gauge capillary tube. Ensure the correct seating of the ring seal.
7.
Top up with water until the required system pressure is restored.
8.
Open the stopcocks for heating. Vent the system again (top up with water if required).
9.
Mount the heat insulation layers and put on the sound insulation hood.
5.4
Changing cables
The connection cables can be loosened either on the boiler control panel or on the component in question.
– The cables for the internal components in the unit are connected to the circuit board connectors and cannot be released.
They can be released from the respective components where they are plugged in.
– The cables for external components (e.g. external temperature sensors), or for components not included in the scope of supply
(e.g. mixer), are connected to the circuit board connectors with screw terminals.
Changing the cables (observe sequence)
1.
Remove sound insulation hoods.
2.
Unscrew control panel cover and remove cable duct cover.
3.
Pull out the corresponding sensor or connection cable from the cable duct of the control panel.
4.
Pull out the associated connector from the switchboard PCB.
5.
Separate the other cable end from the component (release plug connection or remove the cable from the terminal).
6.
Replace the cable. Ensure that the cable cross section is correct.
Install the new cable in reverse order. Whilst doing so, ensure the following:
– The technical specification of the new cable must correspond to the values of the replaced cables (e.g. conductor cross
section).
– The circuit board connectors are colour and shape-coded. Do not force the connector!
Fig. 5-8
Loosen cable duct holder
Fig. 5-9
Remove the fixing screws for the boiler control panel
WARNING!
Live parts can cause an electric shock on contact and cause life-threatening burns and injuries.
• Before beginning work on live parts, disconnect them from the power supply (switch of fuse, main switch)
and secure against unintentional restart.
