gledhill Torrent GreenHeat TGH140-OV Design, Installation & Servicing Instructions page 20

INSTALLATION
S Plan Open Vented Heating System
Max.
height
10m
Y Plan Open Vented Heating System
Max.
height
10m
TORRENT GREENHEAT OV
Min. 250mm
Auxiliary
central heating
Min. 250mm
Auxiliary
central heating
The two diagrams shown on this page show
how an 'S' plan and 'Y' plan may be used in
conjunction with the Torrent GreenHeat OV,
with another space heating supply being taken
direct from the store. The type of space heating
used is the installer's choice and the diagrams
only show possible layouts.
The auto bypass is positioned here to allow
minimum flow rates through the boiler as
TRVs close; and to allow for boilers with pump
overrun.
Off delay timers may be considered for use
in situations where the boiler pump overrun
is controlled by sensing a temperature drop
before shutting off. This type of boiler may
cause the pump to run on for some minutes
while the temperature slowly drops, but the
store temperature may also drop causing the
boiler to fi re again; the boiler then short cycles.
If an off delay timer is used it allows the pump
to overrun for about a minute to remove any
excess heat; then shuts off the pump, but it does
not remove so much of the heat from the store
that it causes the boiler to fi re again.
A solid fuel boiler is also able to be connected to
the Torrent GreenHeat OV, please refer to page
20 for further information.
Page 20