gledhill Torrent GreenHeat TGH140-OV Design, Installation & Servicing Instructions page 38

INSTALLATION
Torrent OV Models (heated by electricity only)
Ensure that the thermal store is fi lled with water to the water level mark inside the
feed and expansion tank and the ball valve (if fi tted) is adjusted correctly.
If a ball valve is fi tted turn down the service valve once the system is fi nally fi lled to
the point where the warning/overfl ow pipe will cope with the discharge arising from
a ball valve failure.
Switch the immersion heater on and allow the store to heat up to full temperature
(typically 75 – 77°C).
Instruct the occupant on how to use the off-peak timer (if fi tted) and the appliance.
Fill in and sign the 'Benchmark' section of this manual and leave it in a suitable place
near the appliance.
Electrician/Installer: Please note that water at the hot tap does not indicate that the
Torrent is full. Check that there is water in the feed and expansion tank before switching
on the immersion heaters. Dry fi ring the elements will cause premature failure which
is not covered by our warranty.
Non-Electric Torrent Models
Open the incoming stop valve and fi ll the domestic hot water system. For open vented
heating system, fi ll the whole of the primary heating system and the thermal store
with potable water through the feed and expansion tank. For sealed heating system
fi ll the thermal store with potable water through the feed and expansion tank and
the heating system to the design pressure using the fi lling loop.
Check the water level in the feed and expansion tank and adjust the ball valve if
necessary. Check the whole of the primary heating and domestic hot and cold
distribution system, including the Torrent for leaks.
It is essential that all systems function properly for optimum performance and to
achieve this:-
• The primary system should be commissioned in accordance with good practice
and generally in accordance with the requirements of BS 6798, BS 5449 and BS
7593. Full details of the requirements are given in PAS 33:1999 under section 10
Commissioning.
• The boiler manufacturers instructions should be followed during the commissioning
phase.
• If a solar thermal system is fi tted it should be commissioned as per manufacturers
instructions to ensure compliance with Building regulations.
• When using either cleansing or corrosion inhibitor chemical, the manufacturers
instructions must be followed.
When determining the quantities of cleanser required, the volume of the Torrent should
be added to the water content of the primary system. Although the Torrent has no
special water treatment requirements, the radiators and other parts of the circuit will
require the application of a scale and corrosion inhibitor.
COMMISSIONING
If it is proposed to 'powerflush' the heating
system we would recommend that the Torrent
is isolated from the heating system being
cleaned, as debris from the system could be
washed into the Torrent and could impair its
performance or seriously damage the unit. If
in doubt please contact our Technical Helpline
on 01253 474584.
• Fill the system and fl ush cold and then refi ll
and vent the system.
• Add cleanser such as Fernox Superfl oc or
sentinel X300 to ensure that fl ux residues
and the installation debris are removed from
the system.
• Ensure that the store thermostat is set at
75°C and the boiler thermostat is set at its
maximum. Set the boiler/system pump to
give temperature difference across the boiler
between 8 – 15°C.
• Switch on the system and to ensure full
cleansing, circulation to all parts of the
system should continue for a minimum of 1
hour.
• Flush the system hot having checked that
there is no overflow or leaks when the
system is up to temperature.
• Refill and vent the system and add
appropriate amount of scale inhibitor, such
as Fernox MB1 or Sentinel X100.
Set the boiler temperature to maximum and
with the central heating off, let the system (i.e.
store) heat up (Approximately 1 – 2 hours).
When the store is up to temperature (75 -77°C): -
• Check that the space heating system
controls (e.g. programmer, room thermostat)
are functioning correctly.
Switch off space heating system and ensure
that the store thermostat is set to 75°C and the
boiler thermostat is set to maximum.
Re-fi re the boiler by running a little water and
wait for the boiler to switch off. Check that there
is no live supply from the store thermostat i.e.
it is satisfi ed.
Page 38