9
2-3
Hot Water Overheating
OPERA
OPERA
OPERA
OPERA
OPERATOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
2-3.1 Water Heated by Heating System
When the hot water is heated by the heating system a Thermal Cut-Out Thermostat
prevents the water within the cylinder overheating.
In the event of the water temperature within the cylinder reaching 90°C the thermostat will
trip and close the motorised valve shutting off the flow from the heating system - see fig.
2-3a.
The Thermal Cut-Out Thermostat is a manual reset type, this means it has a button that
pops out when the thermostat has been tripped by overheating.
To reset the system after overheating allow time for the water to cool, or run off some hot
water, then remove the plastic cap and press the Thermal Cut-Out Thermostat manual
reset button.
If the Thermal Cut-Out Thermostat trips more than once, switch off the heating system
and Immersion Heater and contact your installer.
2-3.2 Water Heated by Immersion Heater
When the hot water is heated by the Immersion Heater its integral Thermal Cut-Out
Thermostat prevents the water within the cylinder overheating.
The Immersion Heater Thermal Cut-Out Thermostat is a manual reset type, this means it
has a small button that pops up when the thermostat has been tripped by overheating.
To reset the system after overheating switch off the Immersion Heater, allow time for the
water to cool, or run off some hot water.
WARNING
ALWAYS ISOLATE THE IMMERSION HEATER BEFORE REMOVING COVER.
When the cover is removed electrical live terminals are exposed.
Fig. 2-2b 500 Immersion Heater
Adjustment
2-2.2 Hot Water Control - 500 Cylinders
When the hot water is heated by the electric Immersion Heater the temperature of the hot
water at the taps is controlled by the Immersion Heater Thermostat which has an
adjusting knob located on top of the plastic Immersion Heater cover.
The temperature range is 30°C to 85°C.
Recommended setting is 60°C.
Fig. 2-3a Thermal Cut-Out Thermostat
MANUAL RESET
BUTTON
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