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14
SIME SUPPORT THE BENCHMARK INITIATIVE
All relevant sections of the logbook must be filled in at the
time of installation and thereafter service information on the
back page of the logbook. Commissioning of the boiler is not
complete until the logbook is filled in.
Before commissioning the appliance, the whole gas installa-
tion including the meter MUST be purged and tested for gas
soundness in accordance with BS6891.
IMPORTANT: open all doors and windows, extinguish naked
lights, and DO NOT SMOKE whilst purging the gas line.
Before commencing the commissioning procedure, ensure
that the electricity supply is isolated and the gas service cock
is turned on.
4.1
INITIAL WATER FILL AND
LIGHTING THE APPLIANCE
– Open all the valves in the system and ensure the system
and boiler are thoroughly flushed.
– Refill and vent the complete system and boiler and check for
water leaks. Ensure all valves are open to complete this.
– Connect a suitable pressure test gauge to the test point,
located on the gas valve.
– Set all external controls to on and turn on the electrical supply.
– Turn the boiler control to maximum and check the pump is
operating correctly and water is circulating.
– After a short period the ignition lockout indicator will be illumi-
nated, Press the reset button and turn off the boiler control.
– Turn on the gas supply.
– Turn the boiler control to maximum and check the boiler lights.
– Allow the boiler to operate for at least 2 minutes and
check the burner pressure is in accordance with that spe-
cified on the data label.
– If adjustment is required, remove the cover from the top
of the governor on the gas valve and adjust the burner
pressure.
– Replace the cover and turn off the appliance.
– Remove the pressure test gauge and refit the sealing
screw. Check for gas soundness with leak detection fluid.
– Make sure the external controls are fully operational and
the complete system is controlled correctly. Balance the
flow rates through the boiler, radiators and hot water tank.
The complete system should now be allowed to heat to
maximum and a final check completed.
– Turn off the system and drain for the final time.
– Refill and vent the system completely.
– Set the boiler and external controls to a suitable setting.
4.2
ADDITIONAL OPERATIONS
FOR SEALED SYSTEMS
Whilst the system is empty and cold, check the expansion
valve is pre-charged to the desired pressure. This can be
done using a tyre pressure gauge. Increase or reduce the
pre-charge as required.
Following the Hot drain down, flush the system thoroughly and
refill the system to a pressure of 1.5 bar.
Check the operation of the safety valve and check for leaks.
Whilst still cold, adjust the system pressure to that required.
Set the pointer on the gauge to indicate the set pressure.
4.3
FINAL CHECKS
– Re-light and test for gas soundness.
– Re-fit the white outer casing and secure it at the bottom
with the two screws provided.
4.4
USER’S INSTRUCTIONS
Upon completion of commissioning and testing the system,
the installer should:
– Give the ‘Users instructions’ to the householder and empha-
sise their responsibilities under the Gas Safety [Installation
and Use] Regulations 1998 (as amended] Explain and
demonstrate the lighting and shutdown procedures.
– Advise the householder on the efficient use of the system,
including the use and adjustment of all system controls.
– Advise the user of the precautions necessary to prevent
damage to the system, and to the building, in the event of
the system remaining inoperative during frost conditions.
– Explain the function of the boiler overheat control, and how
to reset it.
– Emphasise that if cut out persists, the boiler should be tur-
ned off and the installer or service engineer consulted.
– Stress the importance of an annual service, by a regular
heating engineer.
4
COMMISSIONING AND TESTING
GAS COCK
INLET GAS PRESSURE
TEST POINT
OUTLET GAS PRESSURE
TEST POINT
BURNER PRESSURE ADJUSTER
Fig. 16
GAS VALVE SHOWING GAS PRESSURE TEST POINT,
ADJUSTER AND GAS COCK
IGNITION AND
TEMPERATURE CONTROL
LOCK-OUT BUTTON
OVERHEAT WARNING LAMP
APPLIANCE CONTROLS
Fig. 17
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