5.2 Use of the control panel
5.2.1 Control
1. The controls are operated by the buttons and knobs shown.
1 Central heating water temperature control
2 Domestic Hot Water temperature control
3 Reset button
5.3
Shutdown
Isolate the mains power supply at the fused spur unit.
Isolate the gas supply at the boiler valve.
Protect the boiler from frost.
Important
The boiler is not protected against frost once it has been shut
down.
Important
If it is anticipated that the boiler will not be used for a long period
or the property is to be unoccupied it is recommended that the
system be drained if the electricity and gas supplies are to be
turned off. Your installer will be able to offer advice.
5.4
Frost protection
Where possible, draining the system should be avoided. If the system is to
be unused during winter months several precautions must be taken:
Any parts of the system that are in unheated areas of the dwelling fitted
with a device such as a pipe thermostat or frost thermostat.
Power must remain supplied to the boiler and controls.
Gas must remain supplied to the boiler.
The boiler pump will operate if the system temperature drops below 7°C. If
the temperature falls to 4°C the burner will ignite and remain lit until the
temperature reaches 10°C. At this temperature the burner will extinguish
but the pump will continue to operate for 15 minutes. This feature will pro
tect the boiler and to some extent adjacent parts of the system but addi
tional devices must be incorporated to guarantee frost protection.
Fig.9 Operating the controls
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