Technical data

31
SECTION 8 WIRING DIAGRAMS
8.1 INSTALLATION OF VOKERA TIMECLOCK
(part n° 201 or 202)
The Vokera time clock (part no. 201 & 202) can be
installed using the following procedure:
• Isolate the appliance from the electrical supply
and remove the casing as described in 4.9.1.
• Gain access to the electrical input board as
detailed in 4.9.2.
• Remove the square blanking plate from the
clock aperture of the control panel.
• Connect the wires to the clock as shown in fig.
31.
• Mount the clock to the clock aperture using the
screws provided.
• Remove the factory fitted link between
terminals 2 & 3 on plug M7.
• Connect the clock wires to the electrical input
board as shown in fig. 31.
• Replace the input board cover and appliance
casing once the clock installation has been
completed.
8.2 EXTERNAL CONTROLS WIRING
If additional or alternative controls are required,
they must be connected to the boiler as shown in
the following diagrams.
NOTE
Guidance on the recommended practice for the
installation of external controls, can be found
in CHeSS – HC1/HC2 (www.energy-
efficiency.gov.uk).
Fig. 31
Room thermostat contact rated at 230V
Fig. 32
“S” plan system
Room
thermostat
contact rated at
230V