for the hot taps to be adjusted. Turning it clockwise increases
the temperaJure.
Pressure gauge
This indicates the central heating system
pressure. The red pointer will have been set by your Installer
and must not be moved. The white pointer indicates the actual
pressure, which will increase as the system warms up. Do not
operate the boiler if the pressure falls below 0.5 bar. If this
happens, contact your Service Engineer to have the system
re-pressurised.
Overheat Lockout reset button
If there is a burner control
malfunction,
or an interruption
in the power supply, the
overheat thermostat will switch the boiler off and the red
lockout neon will light. If the boiler continually goes to 'lockout'
a fault exists and you will need to call your Service Engineer.
Safety valve
The boiler is fitted with a safety valve to release
excess pressure from the system if it overheats. If water or
steam is discharged from the end of the pipe, switch off the
boiler and contact your Service Engineer.
Flue terminal
The flue terminal on the outside wall must not
be obstructed or damaged. In cold weather steam might
appear from the terminal this is quite normal for a high
efficiency boiler. In severe conditions check that the terminal
does not become blocked by snow.
Central heating system
The boiler is fitted with an automatic air vent which removes
air from the system as it leaves the boiler. Any air trapped in
the radiators needs removing by venting the radiators using
the vent screw at the top of the radiators. Only vent a radiator
if the top is cool and the bottom is hot. Excessive venting will
reduce the system pressure, so only vent when necessary and
check the system pressure as mentioned above.
Note: Your sealed system may incorporate a 'Top Up' vessel,
advice on how to use it should be obtained from your Installer.
Domestic hot water system.
The flow of water from the taps (hot or cold) depends upon the
mains water pressure, and in some homes it may not be
possible to use a number of taps at the same time.
The temperature of water leaving a hot tap depends on a lot of
variables, such as mains pressure, distance of the tap from
the boiler and the flow rate of the water leaving the tap. It may
take some time and experimenting
with the temperature
control (see below) and how far you open a tap to achieve the
results you require. Remember, if you open a hot tap fully it
may not supply water at such a high temperature as when you
only open it half way.
The temperature of the hot water leaving the boiler for the hot
taps can be increased by turning the hot water temperature
control knob (see Fig. 1) clockwise.
ROUTINE SERVICING
To ensure the continued efficient and safe operation of the
GlIPpliance,it is recommended that servicing is canrJed·out at
regular intervalS, the frequency of which will vary, depending
on the installation conditions and usage. Service inspection
once a year is recommended.
Servicing
must be completed
by a competent
(CORGI
registered) person.
CLEANING
To clean the appliance casing use a damp cloth and a little
detergent. Do not use an abrasive cleaner.
5"7030
