Glow-worm SS 115, Instructions For Use Manual, Page: 15 / 24

5 Commisioning
5.1 Filling Secondary DHW Circuit
NOTE: Do not manually open the temperature and pressure
relief valve or expansion relief valve for venting purposes
(any foreign matter in the pipework may cause damage to the
valve seats).
Ensure that the cylinder drain valve (fig. 6) is closed.
Open all the hot and cold water outlet taps or other fittings.
Open the mains water supply to the Glow-worm cylinder and
continue filling until water runs freely from the outlet taps/
fittings, ensuring all air pockets are purged.
Close the outlet taps/fittings and check the system for leaks.
Specially check the connection of the immersion heater for
leaks.
The system should now be thoroughly flushed.
Open hot water taps at opposite ends of the system and
allow water to discharge for at least 5 minutes.
Close the hot water taps.
5.2 Filling the Central Heating Circuit.
NOTE: Do not use boiler pressure relief valve for venting
purpose.
The complete CH system must be flushed out with both cold
and hot water. Fill and vent the central heating system as
detailed in the boiler installation instructions.
To assist with this operation set the manual override lever
on the 2 port diverter valve (diagram 4.6) to the MANUAL
position, and lock in this position by pushing the lever into the
valve head.
Completely drain the CH system, then refill and vent.
Reset the lever on the 2 port valve to the ”AUTO” position
by releasing the manual operating lever from the valve head
(pull outwards). For commissioning purposes and to reduce
the time for the cylinder contents to reach temperature, set
the cylinder hot water thermostat knob to the middle position
(approx. 40°C).
Operate the boiler as in section 5.3 until the cylinder has
reached temperature and all radiators in the system are hot.
Then once again drain the complete CH system to remove
residues from the pipework and refill and vent again as
above.
Reset the manual operating lever on the 2 port valve to
the ”AUTO” position once the system has been refilled and
vented.
5.3 Operating the Boiler
Ensure the boiler mains switch is turned on.
Ensure that the programmer and room thermostat is
calling for heat.
Check that the boiler operates and heats the cylinder
contents and the radiators according to the DHW and
room thermostat settings.
Carry out the commissioning and testing procedures
detailed in the installation instructions supplied with the
boiler.
Upon completion of the commissioning procedures, adjust
the DHW thermostat on the Glow-worm cylinder to approx.
60°C, and set the back up immersion heater thermostat to
60°C, see diagram 4.8.
5.4 Benchmark Log Book
Complete the Benchmark Cylinder Commissioning
Checklist included in the inside back pages of these
instructions.
5.5 User’s Instructions
Hand these instructions for use to the user for retention
and instruct in the safe operation of the boiler and cylinder.
Advise the user of the operation of the cylinder thermostat
and the immersion heater thermostat, and that normally
a setting, which gives a stored water temperature of
approximately 60°C is adequate.
NOTE: In hard water areas the DHW temperature setting
should not exceed this setting to avoid possible scale
build-up.
Advise the user of the precautions necessary to prevent
damage to the system and to the building if the system
does not remain operative during frost conditions.
Advise the user that the immersion heater is provided as
a back up means of water heating and is not intended for
use at the same time that the boiler is heating the cylinder.
Finally, advise the user that for continued efficient and
safe operation, the boiler and Glow-worm cylinder should
be serviced at least once a year by a qualified servicing
company.
It is the Law that any servicing is carried out by a
competent person approved at the time by the Health
and Safety Executive. It is important and strongly
recommended that arrangements are made for a
maintenance agreement with a qualified servicing
company to ensure regular servicing of the boiler and
cylinder.
Please contact Glow-worm's Own Service Organisation
(01773-828100) for further details.
NOTE: Leave installation, servicing and user instructions
with the user.
6 Maintenance
The following maintenance work has to be carried out
annually by the competent person approved at the time by
the Health and Safety Executive or Glow-worm's Own Service
Organisation.
Inspection of pressure/temperature relief valve and expansion
relief valve.
Manually operate each valve by twisting the operating cap,
and check if water flows unobstructed via the tundish to the
discharge point. Ensure that both valves re-seat satisfactorily.
Check pressure of expansion vessel.
Turn off mains water supply and open nearest hot water tap to
depressurise the DHW system.
Check the expansion vessel charge with a pressure gauge
at the test point. If the pressure is below 3.0 bar, top up
with suitable air pressure pump.
Servicing procedures for the Glow-worm boiler are
contained in the boiler installation and servicing
instructions.
Complete the service section of Benchmark Cylinder
Commissioning Checklist included in the inside back
pages of these instructions.
NOTE: In the event that parts require replacement, use
only genuine spare parts supplied by Glow-worm.
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