18
5.2
SEALED WATER SYSTEMS
a) The whole of the system shall be thoroughly flushed with cold
water, filled, vented and pressurised to obtain 1.2 bar. Check
for leaks.
b) Carry out the procedures detailed in section 5.1 (b) to 5.1 (n).
c) Re-pressurise the system to the desired charge pressure.
d) Continue to perform procedures detailed in section 5.1 (o)
and (p).
FIT HINGED FRONT PANEL
i) Turn off the appliance and remove the test pressure gauge.
Tighten the burner pressure test screw and re-light the
appliance. Check for leaks around the screw using leak
detection fluid.
j) Ensure all external controls (e.g timer, room thermostat etc) are
set correctly. The boiler temperature control (Fig 28) can be set
between 64
o
c - 80
o
c.
k) Balance the system by adjusting the pump speed to obtain the
required flowrate (refer to section 3.8).
l) The appliance and the system should be allowed to operate in
order to obtain its maximum working temperature whilst
examining for water leaks.
m) Turn off the appliance and drain the heating system whilst still
hot.
n) Refill and vent to ensure all air is cleared from the system.
o) Refit the right hand side inner casing panel and secure using
the two screws.
p) Fit the appliance hinged front panel (if appropriate, Fig 30)
and adjust the appliance control bezel and all external
controls to the desired settings.
Note: If hinged front panel is not used it is required to block the
four hing fixing points using the screws provided.
30
5.3
USERS INSTRUCTRIONS
Upon completion of commissioning and testing the system, the
installer should draw the user's attention to the following.
a) Give the 'Users Instructions' to the householder and emphasise
their responsibilities under the 'Gas Safety (Installation and Use)
Regulations 1996' (as amended).
a) Explain and demonstrate the lighting and shutdown
procedures.
b) Advise the householder on the efficient use of the system,
including the use and adjustment of all system controls for both
DHW and CH.
c) 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.
d) Explain the function of the boiler overheat thermostat, and
how to re-set it. Emphasise that if cut-out persists, the boiler
should be turned off and the installer or service engineer
consulted.
e) Stress the importance of an annual service by a registered
heating engineer.
f) The electrical mains supply to the appliance must remain ON
and the Main Switch must left either in the Hot Water or
Heating & Water mode for the frost protection circuit to
operate.
5.4
BOILER LOGBOOK
A logbook is supplied with this appliance to record installation
and commissioning details and make future servicing of the
appliance easier.
This logbook forms part of the industry's Benchmark code of
practice for the installation, commissioning and servicing of central
heating systems.
Please ensure that the logbook is fully completed and left with the
customer for future reference along with Users Instructions and this
Installation and Servicing Instruction manual.
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