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Please ensure the "Benchmark" logbook is completed and left
with the user.
It is the law that any servicing must be carried out by a
competent person.
8.1 All Systems
Commissioning should be carried out by a competent person in
accordance with the current issue of BS6798.
Make sure that the system has been thoroughly flushed out with
cold water without the pump in place.
Refit the pump, fill the system with water, making sure that all
the air is properly vented from the system and pump.
Before operating the boiler check that all external controls are
calling for heat.
8.2 Sealed Water Systems Only
Flush the whole system with cold water without the pump in
place. Refit the pump and fill until the pressure gauge registers
2.7bar (40lbf/in2). Clear any air locks and check for water
soundness.
Check the operation of the safety valve, by allowing the water
pressure to rise until the valve opens. The valve should open
within +/-0.3bar (+/-4.3lbf/in
this is not possible conduct a manual check and test.
Release cold water to initial system design pressure.
The set pointer on the pressure gauge should be set to coincide
with the indicating pointer.
8.3 Initial Lighting and Testing
CAUTION. This work must be carried out by a competent
person, in accordance with the current issue of BS6798.
Make sure that all naked lights and cigarettes are out.
Identify the controls by reference to diagram 8.1.
Check that the boiler is isolated from the electrical supply.
Make sure that the control thermostat is turned to "O" the "Off"
position.
Turn boiler gas service cock "On".
Test the pilot supply tube and its connection for gas soundness
as follows:
Disconnect the ignition lead from the PCB, see diagram 7.2.
Remove the combustion chamber front, see diagram 8.2.
WARNING. The fan operates on mains voltage, terminals will
become live.
Turn the electrical supply on and check that all remote controls
are calling for heat.
Check that the pump is circulating water through the system.
To complete the test it is necessary to operate the boiler without
its case, but UNDER ALL OTHER CIRCUMSTANCES the case
must be correctly fitted and sealed.
Turn the control thermostat knob fully clockwise and the fan will
work.
Note. There will be no sparks at the pilot. Take care and light
the pilot with a match.
Test the pilot supply and connections for gas soundness, using
a suitable leak detection fluid.
Very cold weather may delay the operating sequence.
The pilot rate is preset and must not be adjusted.
The step adjustment screw must not be touched.
2000225135A
8 Commissioning
2
) of the preset pressure. Where
SETTING
CONTROL
POINT
THERMOSTAT
CLEANING PLATE
SECURING
SCREW
COMBUSTION
CHAMBER
FRONT PANEL
The pilot flame length should be as shown in diagram 8.3.
Turn the control thermostat knob to "O" and isolate the boiler
from the electrical supply.
24
OVERHEAT
SAFETY
CUT-OFF
GAS SERVICE COCK
(SHOWN OFF)
Diagram 8.1
SECURING
SCREW (8)
VIEWING
WINDOW
Diagram 8.2
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