Hot Water
Energy
Storage
Unvented Cylinder
Installation & Maintenance Instructions for an unvented
hot water cylinder with internal thermal expansion
SEPT 2018
14
THERMOSTAT WIRING DIAGRAMS
≈12°C
68°C
±3.5°C
≈55°C
LEFT HAND THERMOSTAT (If fitted): BOILER CONTROL
RIGHT HAND THERMOSTAT: IMMERSION HEATER CONTROL
Thermostat/s pre
-
set to approximately 55°C.
The outlet water temperature should be checked and the
thermostat adjusted according to the cylinder commissioning
process.
High limit cut out operating temperature: 89°C +0
-
10°C
Thermostat switch rating: 20A @ 250V
USER INFO: If the high limit thermostat trips, isolate all electrical sup-
plies and contact your cylinder installer.
Adjusting temperature settings after commissioning may cause water
to reach scalding temperatures at the outlets
150910
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ver1.0
The diagrams below show the wiring within the thermostat box for indirect and direct cylinders respectively.
The thermostat mounted on the right controls the immersion heater.
The thermostat on the left switches the controls for the primary heat exchanger.
On reciept the thermostat probes will be inserted into the thermostat pockets on the immersion heater. The immersion heater
thermostat probes should alway be inserted in the upper thermostat pocket on the immersion heater and the primary heating
thermostat probes should always be inserted into the lower thermostat pocket on the immersion heater.
Connect immersion heater supply right terminal block as detailed inside enclosure
Pre-plumbed cylinders will already be connected to the primary circuit thermostat. Use wiring diagram on previous page to
connect to thermostat
