User Instructions
7
To Re-pressurise the System
by adding Water
You may have to wait for the boiler to
cool down before the button will
reset. If this condition repeats,
contact your Service engineer.
Check the system pressure and
re-pressurise as necessary before
attempting to reset the overheat
thermostat. Refer to Sealed central
heating system in these instructions
for details on re-pressurising the
system.
Ventilation - Always ensure that the
boiler has adequate ventilation. Any
ventilation openings in the boiler casing
must not be obstructed. Periodically
check that they are clear. Do not attempt
to ‘box in’ the boiler or build a
compartment around it. Do not place
any combustible material on or around
the boiler.
Flue terminal - The flue terminal must
not be obstructed or damaged. In
severe conditions check that the
terminal does not become blocked with
snow. Do not place any combustible
material on or around the flue terminal.
!
NOTE
The time and on/off settings on a 7-
day or 24-hour timer or a 2-channel
programmer may need to be reset
after a power failure.
The Grant Programmable Room
Thermostat and Wireless
Programmable Room Thermostat are
battery powered and will be
unaffected by a power failure.
Electricity Supply
The boiler requires a 230/240 V - 50 Hz
supply. It must be protected by a 5 Amp
fuse.
!
NOTE
Add water to the system only when it
is cold and the boiler is switched off.
Do not overfill.
The procedure is as follows:
1. 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.
2. Gradually open the double check
valve on the front of the filling loop
until the water is heard to flow.
3. Vent each radiator in turn, starting
with the lowest one in the system, to
remove air.
4. 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.
5. Close the valves either side of the
filling loop and disconnect the loop.
General Notes and Care of
your System
Boiler controls - Refer to the section
Boiler controls.
Pressure switch - If the heating system
water pressure falls below 0.2 bar the
boiler pressure cut-out switch will
activate and the red ‘LOW PRESSURE’
indicator on the control panel (see Figure
2) will flash. The system must be
recharged to between 0.5 to 1bar. If the
heating system loses pressure on a
regular basis then contact your Installer
to investigate the cause.
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 will
light. Usually such malfunctions are short
lived and pressing the reset button will
restore normal operation.
The reset button should not be pressed
more than twice in attempting to start
the burner.
If the burner continually goes to ‘Lock-
out’ a fault exists or the fuel supply is
low. If you have checked that you have
sufficient fuel, you will need to call your
Service engineer.
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. The
red ‘OVERHEAT’ indicator on the control
panel (see Figure 2) will flash indicating
the overheat 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 Figure 2), and
press the button and the ‘OVERHEAT’
indicator should go off. Replace the
plastic cap.
Frost Protection - Your boiler is fitted
with a pre-set internal frost protection
thermostat. Should either the air
temperature around the boiler, or the
water temperature within the boiler, fall
to below 5°C then this thermostat will be
activated. The boiler will then operate
briefly to prevent it from freezing. Your
boiler may also be fitted with a remote
frost protection thermostat; check with
your installer. If you are intending to be
away for a long period, the boiler and
system should be drained. Contact your
Service engineer for draining and filling
the system.
Cleaning and servicing - Lightly wipe
over the case with a damp cloth and a
little detergent. Do not use abrasive
pads or cleaners. You should have your
boiler serviced at least once a year to
ensure safe and efficient operation.
Contact your Service engineer for further
details.
Failure of electricity supply - If the
electricity supply fails, the boiler will not
operate. It should relight automatically
when the supply is restored.
!
WARNING
The Vortex boiler contains electrical
switching equipment and must be
earthed.
!
WARNING
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