8
WATER
HEATER
OPERA
OPERA
OPERA
OPERA
OPERATOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
2-1
Hot Water Temperature - Heating System
Fig. 2-1a Typical Hot Water Control
N
L
1
2
2-1.1 Hot Water Control - Heating System
When the hot water is heated by the heating system the temperature of the hot water at
the taps is controlled by the Cylinder Thermostat. This controls a motorised valve that
opens and closes the flow from the heating system.
The temperature range is 30°C to 85°C.
Recommended setting is 60°C.
CYLINDER
THERMOSTAT
IMMERSION HEATER
MOTORISED VALVE
FLOW FROM
HEATING
SYSTEM
THERMAL CUT-OUT
SAFETY THERMOSTAT
2-2.1 Hot Water Control 125, 150, 210 & 300 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. This is located under
the black Immersion Heater cover.
The temperature range is 30°C to 85°C.
Recommended setting is 60°C.
Fig. 2-2a shows the approximate setting position for 60°C.
The Immersion Heater has a Thermal Cut-Out, refer to 2:3.1.
WARNING
ALWAYS ISOLATE THE IMMERSION HEATER BEFORE REMOVING COVER.
When the cover is removed electrical live terminals are exposed.
DOUBLE POLE SWITCH
Note
For 500 Cylinders see 2-2.2.
Fig. 2-2a Immersion Heater Thermostat
ADJUSTMENT
2-2
Hot Water Temperature - Immersion Heater
LOWER
HIGHER
SHOWN AT 60° APPROX.
RESET
22222
