30
10
Commissioning
10.1 Before Switching On
1. Ensure the boiler On/Off switch is
set to OFF.
2. Check that the high limit thermostat
bulb and both thermistor sensors
are correctly located in their
respective pockets. Refer to
Figure 10-2. Check condition
of both thermistor cables and
thermostat capillary. Ensure they
are not damaged, broken, kinked or
crushed.
3. Remove the nuts and washers
securing the front cleaning door.
Withdraw the door – take care as it
is HEAVY!
4. Check that the turbulators are in
position and that the ends are
vertical. Refer to Figure 11-4.
5. Check that the baffles are in
position. Refer to Figures 11-1,
11-2, or 11-3 as required.
6. Re-fit cleaning door and check it is
fitted correctly and that a good seal
is made.
7. Remove and check the burner.
Check burner head is correct.
Refer to Section 2.3 and Figures
13-2, 13-3 or 13-4 as required.
Check electrodes are set correctly.
Refer to Figure 11-5.
Check the nozzle is correct for the
output rating required. Refer to
Section 2.3.
Check burner air adjuster disc is
set to setting C (Vortex Combi 21e
only). Refer to Figure 10-4.
8. Check that the sealed system has
been vented and pressurised and
there are no leaks.
9. Ensure both automatic air vents,
and also the manual vent on the
flow pipe, are open.
10. Check that all fuel line valves are
open.
11.
Remove the plastic burner
cover if it was not previously
removed.
12. Connect a combined vent manifold
and pressure gauge to the pressure
gauge connection port on the oil
pump. See Figure 10-3.
13. Check that all system controls are
calling for heat and turn the boiler
thermostat to maximum.
10.2 Switching On
1. Switch on the electricity supply to
the boiler.
2. Set the boiler On/Off switch to ON.
A neon on the switch lights when
it is in the ON position. The burner
should fire.
The burner fan should start and
the burner should light within about
12 seconds. If the burner does not
light and the ‘Lock out’ reset button
lights, wait for about 45 seconds
then press the reset button to
restart the ignition process. This
procedure may have to be repeated
during first lighting.
Open the vent screw on the vent
manifold to vent the supply while
the oil pump is running.
Note that the neon lights when the
boiler is switched on, but does not
necessarily indicate the burner is
firing.
3. Fully open a hot tap and allow it
to run for a few moments to vent
the internal primary circuit. The Hot
Water pump will operate and the
burner should light within about 12
seconds.
4. Close the hot tap. The burner will
continue to fire to heat the primary
water in the boiler or primary store
until the required temperature is
reached.
Grant Vortex e Combi boilers
incorporate a “pump overrun”
feature, within the control circuit
board, that operates as follows –
When reheating the Primary Hot
Water store;
the burner will cut out when the boiler
reaches 83°C (as detected by the boiler
“flow” thermistor).
If there is a demand for Central
Heating;
the hot water “store” pump will run on
for 90 seconds before it stops and the
“central heating” pump then comes in.
If there is no demand for Central
Heating;
the hot water “store” pump will continue
to run until the temperatures in the
Primary Hot Water store and the boiler
have equalised.
The adjustable Boiler
thermostat on the control panel
regulates the boiler temperature
when in Heating mode only. The
recommended flow temperature
setting is 70°C.
The Primary Hot Water store
temperature is controlled via the
“store” thermistor and control circuit
board. The control thermostat
has NO influence on either the
store temperature or the hot water
temperature at the tap.
The Hot Water pump will continue
to run for a short period after the
burner has stopped.
The boiler will now be operating in the
central heating mode.
The burner may not fire immediately
in the central heating mode.
5. With the burner alight, check the
fuel pressure. Refer to the Technical
Information, Section 2.3.
6. Adjust the pressure if necessary -
see Figure 10-3.
It is important that the oil pressure is
correctly set.
7. Operate the boiler until it reaches
normal operating temperature.
Check oil supply/return pipe for
leaks, rectifying where necessary.
8. Check the operation of the boiler
thermostat. Ensure that by turning it
anticlockwise it switches the burner
off.
9. With the burner alight, re-check
the fuel pressure and re-adjust
if necessary. Turn the boiler off,
remove the pressure gauge and
replace the plug in the pump.
10. Ensure that there are no oil leaks,
replace the burner cover.
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