Worcester 18/25 User Manual download pdf (Page 6)

OPERATING THE BOILER

GREENSTAR UTILITY 18/25

8 716 106 257b (03.2010)

USING YOUR

BOILER

OPERATING THE BOILER

SWITCHING THE BOILER ON/OFF:

 To switch on the boiler; turn on the water, oil and electricity supply to the boiler.

 Check the programmer/timer is correct and is set to ON.

 Set the room thermostat to the desired setting.

 Open and set thermostatic radiator valves as required.

 Turn the boiler water temperature control to the required setting.

 To switch off the boiler; turn the programmer/timer to OFF for heating and hot water.

If the boiler is left unused and exposed to freezing conditions; shut off all the mains supplies,

isolate the boiler and drain the system and boiler.

SETTING TEMPERATURE:

Turn the control clockwise to increase the water temperature.

Turn the control anti-clockwise to reduce the water temperature.

The burner will run until the water reaches the set temperature on the heating control. Once the

temperature has been reached the burner turns off.

The minimum and maximum ranges of the temperature control positions are approximately 55°C to

80°C.

CONTROLLING CENTRAL HEATING:

Set the programmer/timer to the correct time with the required ON/OFF periods.

Turn the room thermostat to the temperature required.

Set thermostatic radiator valves to the required temperature for each room.

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Worcester 18/25 User Manual Page 6