gledhill Torrent GreenHeat TGH140-OV Design, Installation & Servicing Instructions page 29

Store stat
ON OFF
C 1 2
L N E
SL
E C 1
ng
Boiler hold off pipe thermostat
Type LL641B1012
Temperature range: 50 – 95
NOTE
As part of system setup and commissioning, it is important that this boiler hold-off pipe thermostat
be adjusted to find the best setting for each individual installation.
Failure to do so will give under performance of either the boiler or the solar heating system
Solar controller
230Vac
50Hz
Solar
supply
Pump
L N E S2
2
C
on E
off
NOTE
Some solar controllers, the overheat protection is provided by a temperature sensor,S3,
which is wired directly to the solar controller same as sensors S1 and S2
o
In this case the mechanical overheat thermostat (S3) shown in this diagram is not required and
C
the solar pump is wired straight to the solar controller.
Solar panels
S1
Boiler hold off pipe thermostat
Type LL641B1012
Temperature range: 50 – 95
NC
Overheat
thermostat
(S3)
Page 29
INSTALLATION
PRV
S1
Torrent GreenHeat SOL
Solar
pumping
station
P1
o
C
S1 : Solar flow temperature sensor
S2 : Solar zone store temperature sensor
S3 : Store overheat temperature sensor/Thermostat
WIRING DIAGRAMS
S3
S2