12
5
CENTRAL HEA
TING SYSTEM
During the first few hours of operation of the central heating
system, check that all radiators are being heated at an even rate.
Should the upper area of a radiator be at a lower temperature than the
base of the radiator, it should be vented by releasing air through the
venting screw at the top of each radiator. Make sure your installer
shows you how to carry out the operation. Repeated venting will
reduce the quantity of water in the system and this must be
replenished for safe and satisfactory operation of the appliance.
Should water leaks be found in the system or excessive venting be
required from any radiator, a service engineer should be contacted and
the system corrected.
SEALED HEATING SYSTEM
The appliance must be fitted to a sealed heating
system which is pre-pressurised. In this case your
installer will advise you on the minimum and maximum
pressure that should be indicated on the pressure gauge.
See Fig. 3. Check regularly that this pressure is
maintained and contact your installer or maintenance
engineer if there is a permanent significant drop in
pressure indicated on the gauge. If the system loses
pressure it should be re-pressurised as instructed by the
installer
(N.B. Maximum operating pressure 2.5 bar)
.
Pressurising The System
(See Fig. 2).
(If in doubt leave this procedure to your installer).
Remove the bottom panel to gain access to the
filling loop assembly.
Insert the bayonet end of the filling key into the
corresponding cut outs in the filling loop housing and
twist to lock the key in place.
Turn the grey knob anti-clockwise to allow water
ingress and fill until the required pressure is reached.
Turn the grey knob clockwise to stop filling and
remove the filling key by lining up the bayonet end of
the key with the cut outs in the filling loop housing and
withdrawing the key.
N.B. The key must always be removed from the
filling loop housing after the system has been filled to
prevent accidental filling and to comply with Byelaw
14 of the Water Byelaws Scheme.
Store the key in a safe place for future use and refit
the bottom panel
GENERAL NOTES
9
8
OPERATION OF
CONTROLS
More than 30% of all calls made to our contact centre reporting
appliance faults or breakdowns prove to be false alarms, as there is often
a simple explanation for the apparent malfunction.
So, to help you save time and money – not to mention frustration
and inconvenience – please refer to the General Information, Notes and
Lighting Instructions ensuring all controls are set correctly.
If, after following the instructions the appliance still fails to operate
correctly call the Worcester Contact Centre. Arrangements will be made
for an engineer to call as soon as possible.
CALL-OUT
CHARGES
All of our field service engineers are factory trained.
If you request a visit from an engineer and your appliance has been
installed within the last 12 months, no charge will be made for parts
and/or labour, providing:
•
The appliance was commissioned correctly on installation.
•
An appliance fault is found and the appliance has been installed
within the past 12 months.
A call-out charge will be made where:
•
The appliance has been installed for over 12 months, or
•
Our Field Service Engineer finds no fault with the appliance (see
note), or
•
The cause of breakdown is with other parts of your
plumbing/heating system, or with equipment not supplied by Worcester.
NOTE:
Invoices for attendance and/or repair work carried out on
your appliance by any third party will not be accepted.
APPLIANCE FAILS TO
OPERA
TE
Fig. 3. Controls.
(See also label on inside of appliance front panel).
The appliance is fitted with the following controls:
CENTRAL HEATING TEMPERATURE
CONTROL
The position of this knob will determine the temperature of the
water delivered to the radiators between the
‘I’
and
‘MAX’
position.
When the knob is turned anti-clockwise past the
‘I’
position to the
‘OFF’
(Summer Position) the appliance is off.
FACIA MOUNTED PROGRAMMER (if fitted)
Your installer may have mounted a mechanical programmer into
the facia of your appliance. Operating instructions are supplied with
the programmer.
RESET BUTTON
Press and release this button if the appliance fails to operate - if
the appliance still fails to operate then contact Worcester Bosch or
your installer.
Reset
button
Mains electricity
indicator
CH temperature
control knob
System pressure
gauge
Grey
Knob
Filling Key
Fig. 2.
