To Fit The Timeswitch; To Set The Timeswitch - Worcester 28Si Installation And Servicing Instructions

TIMESWITCH
INSTRUCTIONS FOR
Si RANGE
Gas Safety (Installation and use) Regulations
1984: All gas appliances must be installed
by a competent person, in accordance with
the above regulations. Failure to install the
appliance correctly could lead to prosecution.
The manufacturers notes must not be
taken, in any way, as overriding statutory
obligations.
IMPORTANT; Read these instructions carefully
in order to get the best from your appliance.
WARNING; This appliance must be earthed
and protected by a 3A fuse if a 13A plug is
used, or if any other type of plug is used, by a
5A fuse either in the plug or adaptor or at a
distribution board.

TO FIT THE TIMESWITCH

Warning; Switch off the power supply to the
appliance before starting work.
Remove boiler white case.
Remove the facia cover plate by releasing the
clip at the top and withdraw it from the front.
Present the programmer to the facia and plug
in the programmer connector into the four
way connection on the board. See Fig. 1.
Push the programmer into position ensuring
that the lead is not trapped and that the clip
has been properly engaged.
Replace white case.
Fig. 1.
Worcester Heat Systems Limited, Cotswold Way, Warndon, Worcester WR4 9SW.
Bosch Group
The timeswitch is a 24V single channel unit
which controls the operation of the central
heating circuit (the domestic hot water is
permanently available upon demand and will
always take priority over central heating). The
time clock is a 24 hour unit with on/off
tappets available at 15 minute intervals.
Time Adjustment
See Fig.2. Turn the dial clockwise until the
correct time is at the pointer.
Switch Adjustment
To set the ON periods push the tappets
towards the centre from the start of the
period to the end of the period.
Using the Manual Selector:
Fig. 2.
Programmer
connection
ST5
Telephone: (01905) 754624. Fax: (01905) 754619.
Technical Helpline (0990) 266241.

TO SET THE TIMESWITCH

I Permanent on
Time according to the tappets
Permanent off
1 Dial
2 Time Pointer
3 Manual Selector
4 Tappets
1
2
3
4
8 716 145 228a 01/00