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16
5.1
GAS SUPPLY INSTALLATION
Inspect the entire installation including the gas
meter, test for soundness and purge. Refer to BS
6891 (I.S. 813 in ROI) for specific instruction.
5.2
THE HEATING SYSTEM
The appliance contains components that may
become damaged or rendered inoperable by oils
and/or debris that are residual from the installation
of the system, consequently it is essential that
the system be flushed in accordance with the
following instructions.
5.3
INITIAL FILLING OF THE SYSTEM
Ensure both flow and return service valves are
open, remove appliance casing as described in
4.7.1, identify the automatic air release valves
(AAV) and loosen the dust cap/s by turning the
cap anti-clockwise one full turn.
Ensure all manual air release valves located on
the heating system are closed. Connect the filling
loop as shown in fig. 5, slowly proceed to fill the
system by firstly opening the inlet valve connected
to the flow pipe, and then turning the lever on the
fill valve, to the open position. As water enters
the system the pressure gauge will begin to rise.
Once the gauge has reached 1 BAR close both
valves and begin venting all manual air release
valves, starting at the lowest first. It may be
necessary to go back and top-up the pressure
until the entire system has been filled. Inspect
the system for water soundness, rectifying any
leaks.
5.3.1
MANUAL AIR RELEASE (fig. 17)
When the boiler has been filled for the first time or
the system has been drained and refilled, it will
be necessary to release any air that may have
become trapped within the appliance heat
exchanger. Slacken the bleed screw until water is
released and then close.
IMPORTANT, THERE ARE NO OTHER MANUAL
AIR RELEASE VALVES LOCATED ON THE
APPLIANCE.
5.4
INITIAL FLUSHING OF THE SYSTEM
The whole of the heating system must be flushed
both cold and hot as detailed in 5.8. Open all
radiator or heating valves and the appliance flow
& return service valve. Drain the boiler and system
from the lowest points. Open the drain valve full
bore to remove any installation debris from the
boiler prior to lighting. Refill the boiler and heating
system as described in 5.3.
5.5
PRE-OPERATION CHECKS
Before attempting the initial lighting of the appliance,
the following checks must be carried out:
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Ensure all gas service valves from the meter to
the appliance are open and the supply pipe has
been properly purged;
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Ensure the proper electrical checks have been
carried out, (see 7.8) particularly continuity,
polarity, and resistance to earth;
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Ensure the 3 AMP fuse – supplied with the
appliance – has been fitted;
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Ensure the system has been filled, vented, and
the pressure set to 1 BAR;
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Ensure the flue system has been fitted properly
and in accordance with the instructions;
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Ensure all appliance service valves are open.
5.6
INITIAL LIGHTING
Ensure the electrical supply to the appliance is
switched on. Ensure any external controls are
switched to an ‘ON’ position and are calling for
heat.
Move the selector switch to the ON position, the
appliance will now operate as described in 1.2.
Should the appliance fail to ignite, refer to 5.6 and/
or section 7.
5.7
CHECKING GAS PRESSURE AND
COMBUSTION ANALYSIS
The appliance is factory set and requires no
additional adjustment once installed. However to
satisfy the requirements of GSIUR 26/9 (I.S. 813
ROI), it will be necessary to gas rate the appliance
using the gas meter that serves the appliance.
If the installation does not include a gas meter
(for example LPG) and there are no means by
which to calculate the gas rate, then a combustion
analysis test must be carried out in accordance
with BS 7967 (UK) to ensure the appliance is left
working safely and correctly.
Additionally, if the gas valve has been adjusted,
replaced, or the appliance has been converted
for use with another gas type, then it becomes
necessary to carry out a combustion analysis/
check to ensure that correct combustion is
occurring.
If there are no means to gas rate the appliance
and/or carry out a combustion analysis check,
then it will not be possible to complete the
commissioning procedure.
Details on how to carry out the combustion
analysis can be found in section 7.
SECTION 5 COMMISSIONING
Fig. 17
