Important Do's And Dont's - gledhill Torrent GreenHeat OV TGH140 Design, Installation & Servicing Instructions

INSTALLATION
Torrent OV Models (heated by electricity only)
Ensure that the thermal store is filled with water to the water level mark inside the
feed and expansion tank and the ball valve (if fitted) is adjusted correctly.
If a ball valve is fitted turn down the service valve once the system is finally filled to
the point where the warning/overflow 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.
Ideally the control thermostat should be set to a temperature which does not allow
the temperature at the top of the store does not rise above the low 80s, more typically
75-77. This means that the control thermostat may need to be set at 70°C on some
cylinders, due to the temperature gradient through the store. The actual set point
must set up and checked during commissioning by the installer. The rod thermostats
(XB114) used in these immersion heater incorporate an overheat component which
will operate at circa 95°C. If the overheat component operates the thermostat is no
longer effective and must be replaced.
Instruct the occupant on how to use the off-peak timer (if fitted) and the appliance.
At the time of commissioning, complete all relevant sections of the Benchmark
Checklist located on the inside back pages of this document.
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 firing the elements will cause premature failure which
is not covered by our warranty.
Non-Electric Torrent Models
Open the incoming stop valve and fill the domestic hot water system. For open vented
heating system, fill the whole of the primary heating system and the thermal store
with potable water through the feed and expansion tank. For sealed heating system
fill the thermal store with potable water through the feed and expansion tank and
the heating system to the design pressure using the filling 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 EN 12831, the
CIBSE guide 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 fitted 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 flush cold and then refill
and vent the system.
• Add cleanser such as Fernox Superfloc or
sentinel X300 to ensure that flux residues
and the installation debris are removed from
the system.
• Ensure that the store thermostat is set
as described on page 23, 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: -
• 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 as described on page
23, and the boiler thermostat is set to maximum.
Re-fire 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 satisfied.
Page 38
DO - Check the incoming mains water pressure. If it exceeds 5.0 bar at any point
in the 24 hour cycle then a pressure limiting valve set at 3.0 bar should be
fitted where the cold supply enters the property.
DO - Check the flow rate of the incoming cold water main is adequate to meet
the maximum hot and cold water simultaneous demands.
DO - Check that all connections are in accordance with the labelling on the
thermal store.
DO - Fill the tank manually or adjust the ballvalve so that the water in the F & E
tank is set to the correct level.
DO - Restrict the ballvalve fill rate when full so that the overflow pipe can cope
with the fill rate in the event of a ballvalve failure.
DO - Make sure there is adequate clearance above the F & E tank to service the
valve.
DO - Ensure that range-rated appliances are set to the specified design heat
input and the boiler thermostat is set to maximum for all boilers.
DO -
Ensure that the water level in the expansion tank is at least 250mm above the
highest point on the radiator circuit and satisfies the boiler head required.
DO -
Insulate any exposed pipework in the Torrent cupboard.
DO -
Plumb the overflow warning pipe in 20mm minimum internal diameter
tubing to discharge in a conspicuous external position, using high
temperature uPVC or copper.
DO -
Check the pump setting. This should be set as high as possible (consistent
with not creating noise) so as to give a small temperature difference across
the boiler, i.e. not greater than 11°C.
DO - Leave the electricity switched on to the appliance once it has been filled
and commissioned to prevent the pump sticking.
DON'T - Use a combined feed and vent on Torrent indirect installations.
DON'T - Use tube smaller than 28mm between boiler and Torrent when the boiler
exceeds 60,000 Btu (17kW) output.
DON'T - Use dipped flow and return pipes between boiler and Torrent unless the
boiler is fitted with an overheat switch, then follow the recommendations
on page 15.
DON'T - place any clothing or other combustible materials against or on top of this
appliance.
INSTALLATION

IMPORTANT DO'S AND DONT'S

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