26
Mynute 24m
8.2
CONNECTION OF AN EXTERNAL TIME CLOCK
AND ROOM THERMOSTAT (fig. 19A)
Isolate the appliance from the electrical supply.
Remove the appliance casing and PCB cover as
detailed in section 4.
Connect the time clock/room thermostat as shown
in diagram 219A. Vokera recommend the use of
“voltage-free” type controls. Should another type
of control be preferred, please contact the techni-
cal help-line for detailed advice and guidance.
Carry out the electrical checks as described in
7.11 prior to refitting the PCB cover and appli-
ance casing.
8.3
CONNECTION OF AN INTEGRAL TIME CLOCK
The Vokera integral time clock (Part no. 433) should
be installed as shown in diagram 19B.
If a room thermostat is to be connected, it should
be of the ‘voltage-free’ type and must be con-
nected ‘in series’ as shown in fig. 19A.
Fig. 19A
NOTE
Guidance on the recommended practice for the
installation of external controls, can be found in
CHeSS – HC1/HC2 (www.energy-
efficiency.gov.uk)
The external time-clock and/or room thermostat must be of the
“voltage-free” type and be wired as shown in the diagram.
The “link-wire” must be removed when additional controls are
connected to the appliance.
This appliance requires a permanent 230V electrical supply.
External
time-clock
Room
thermostat
Fusible 2AF
Neutral
Live
Black
Black
Black
Black
Brown
Blue
Fuse 2AF
Fig. 19B
