The boiler is fitted with a safety valve to release excess pressure
from the system. If water or steam is emitted from the end of the
safety valve discharge pipe, switch off the boiler and contact
your Installer or Service engineer.
To re-pressurise the system by adding water:
1 Only add water to the system when it is cold and the boiler
is off.
Do not overfill.
2 Ensure the flexible filling loop is connected and that the shut
off valve connecting it to the boiler is open and the double
check valve at the front is closed.
A valve is open when the operating lever is in line with the
valve, and closed when it is at right angles to it.
3 Gradually open the double check valve on the front of the
filling loop until water is heard to flow.
4 Vent each radiator in turn, starting with the lowest one in
the system, to remove air.
5 Continue to fill the system until the pressure gauge indicates
the required pressure between 0.5 and 1.0 bar. Close the fill
point valve.
6 Close the valves either side of the filling loop and
disconnect the loop.
The temperature of the water leaving the boiler to the radiators
can be increased by turning the boiler thermostat (see Fig. A or
B) clockwise.
The boiler will provide central heating whenever the timer/
programmer (if fitted) is in an 'on' period and the room
thermostat (if fitted) is calling for heat.
1
Boiler controls -
Refer to Section 1.2 or 2.2.
2
Pressure switch -
If the heating system water pressure falls
below 0.2 bar the boiler low pressure cut-out switch will
activate and an amber neon on the control panel (see Fig. A
or B), will light. The system must be recharged to between
0.5 and 1 bar. If the heating system loses pressure on a
regular basis then contact your Installer to investigate the
cause.
3
Burner Lock-out reset button -
If there is a burner
malfunction, a built-in safety circuit switches the burner off
and the Lock-out reset button on the burner (see Fig. A or
B), will light. Usually such malfunctions are short lived and
pressing the reset button will restore normal operation.
If the burner continually goes to 'Lock-out' a fault exists
or
the fuel supply is low. If you have sufficient fuel, you will
need to call your Service engineer.
4
Overheat thermostat -
Your boiler is fitted with a safety
overheat thermostat which will automatically switch off` the
boiler in the case of a control malfunction causing
overheating. A red neon on the control panel (see Fig. A or
B), will light indicating the thermostat has operated.
If your boiler goes off and you try to light it but nothing
happens and the 'Lock-out' reset button on the burner is not
lit, the overheat thermostat has probably operated. The
boiler will not light until the thermostat is reset. To reset,
unscrew the small plastic cap (see Fig. A or B), press the
button then replace the cap.
Note:
You may have to wait for the boiler to cool down
before the button will reset. If this condition continually
repeats, contact your Service engineer.
5
Flue terminal -
The boiler flue terminal must not be
obstructed or damaged.
In severe conditions check that the terminal does not
become blocked by snow.
6
Failure of electricity supply -
If the electricity supply fails,
the boiler will not operate. It should relight automatically
when the supply is restored.
Note:
The timer/programmer may need to be reset after a
power failure.
The boiler requires a 230/240 V - 50 Hz supply. It must be
protected by a 5 Amp fuse.
3 - OUTDOOR COMBI 90 V3, COMBI MAX & CONDENSING COMBI USER INSTRUCTIONS
7
Outdoor Combi 90 V3, Combi Max and Condensing Combi
3.6
\
General notes and care of your system
3.7
\
Electricity Supply
The expansion vessel air charge must be checked
annually. Failure to maintain an adequate air charge in
the vessel may invalidate the warranty.
Warning: This appliance must be earthed.
