Glow-worm 56-2 Back Boiler - Manual (Page 14)

14 221781A
Fire Front Installation and Servicing Instructions are packed
with the fire front.
7.1 Completion - After Installation of the Fire
Front
Instruct and demonstrate to the user, the efficient and safe
operation of the back boiler, heating and hot water system and
fire front.
Hand the Instructions for Use to the user, for their retention,
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 person who let out any property
containing a gas appliance.
It is the Law that any servicing is carried out by a competent
person.
Advise that the boiler is fitted with a safety device and refer to
the instructions for use.
Set any remote controls for the system to settings requested by
the user.
Advise the user of the precautions necessary to prevent damage
to the system and building in the event of the heating system
being out of use during frost and freezing conditions.
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.
5197
6 Commissioning
Diagram 6.3
Diagram 6.4
20mm
FLAME
DIMENSION
Pilot Shield
omitted for
clarity
5340
0
10
20
30
40
50
60
70
80
90
5 10 15 20 25 30
WATER PRESSURE LOSS (mm head of water)
WATER FLOW (litres/minute)
56/2 BACK BOILER
PRESSURE LOSS OF APPLIANCE
0
6.4 Commissioning the System
Set all controls to operate the heating system. Adjust 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 that the back boiler control knob “B” is turned
clockwise to “MAX” against the setting point, allow the water to
reach maximum working temperature. Examine the system for
water soundness.
Do not attempt to adjust the thermostat calibration screw.
Turn the control thermostat knob “B” 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.
7 Fire Installation