Glow-worm Inset BBU50 - Manual (Page 18)

18 221723B
Fire Front Installation and Servicing Instructions are packed
with the fire.
7.1 Completion - After Installation of the Fire
Front
Instruct and demonstrate to the user, the efficient and safe
operation of the boiler, heating and hot water system and fire
front.
Hand the Instructions for Use to the user, making sure that they
are understood.
Advise the user that to ensure the continued efficient and safe
operation of the appliance it is recommended that it is checked
and serviced as necessary at regular intervals. The frequency
of the servicing will depend upon the particular installation
conditions and usage, but in general once a year should be
enough.
Draw attention, if applicable, to the current issue of the Gas
Safety (Installation and Use) Regulations, Section 35, which
imposes a duty of care on all persons who let out any property
containing a gas appliance.
It is the law that any servicing must be carried out by a
competent person.
Set any remote controls for the system to settings requested by
the user.
Advise that the boiler is fitted with a flue blockage safety device
and refer to the Instructions for Use.
Advise the user of the importance to keep any purpose built
ventilation system where the appliance is installed, clear of any
obstruction that would impede its efficiency.
Reminder, leave these instructions with the user.
Advise the user that the ‘Benchmark’ logbook should be
completed by the installation engineer on completion of
commissioning or servicing.
6 Commissioning
Diagram 6.4
6.4 Commissioning the System
Set all controls to operate the heating system. Adjust circulating
pump and balance the system to give a temperature drop
across the boiler of 11
o C (20 o F). At the appropriate flow rate, the
resistance of the back boiler can be found by reference to
diagram 6.4.
There should be no undue noise in the pipework or heat
emitters. There must be NO pumping over of water or entry of
air at the open vent pipe above the feed and expansion cistern.
Make sure the back boiler control thermostat knob “A” is turned
clockwise to “MAX”, which is about 82
O C (180 O F), against the
setting point, allow the water to reach maximum working
temperature. Examine the system for water soundness.
Turn the control thermostat knob “A” anti-clockwise to “Off” and
rapidly drain the system whilst still hot, to complete the flushing
process.
Refill the system, vent and check again for water soundness.
PRESSURE LOSS (mm head of water)
FLOW RATE (litres / minute)
700
600
500
400
300
200
100
0 5 10 15 20 25 30
0
-100
6240
7 Fire Installation
8 Servicing
Servicing Notes
a) To ensure the continued efficient and safe operation
of the appliance it is recommended that it is checked
and serviced as necessary at regular intervals. The
frequency of the servicing will depend upon the
particular installation conditions and usage, but in
general once a year should be enough.
b) It is the Law that servicing must be carried out by a
competent person.
c) Remove the fire front
d) Refer to the Gas Fire Front Installation and Servicing
Instructions for full details of fire front removal.
e) After completing any servicing always test for gas
soundness with a suitable leak detection fluid and
carry out functional check on controls.
f) Unless stated otherwise reassembly of all components
is in the reverse order to that for removal.
8.1 Isolation of Services
With the fire front removed.
Refer to diagram 6.1 to identify the controls.
Turn control thermostat knob “A” anti-clockwise to “0” “Off”
position.
Isolate the electrical supply to the back boiler.
Turn appliance gas service cock to “Off”, see diagram 6.2.
8.2 Sensing Tube Assembly.
Remove the sensing tube securing screw, carefully pull the
sensing tube assembly away from the sensing tube fitting on the
draught diverter and from the flue blockage safety device.
Remove the sensing tube fitting and the tubing nut to access the
filter.
Clean or replace the filter, check the “O” rings for damage,
replace if necessary, see diagram 8.1.
IMPORTANT NOTE: When replacing the sensing tube check
the “O” rings and filter are fitted.