Operating instructions

TEMPERATURE CONTROL

SAFETY THERMOSTAT

The temperature control knob gives you control

over the water temperature in your central heating

radiators, and you can adjust it to any position with-

in the indicated range (as shown in Fig. 3).

Higher settings obviously mean hotter radiators

and rooms will reach the required temperature

quicker. The ideal setting varies from property to

property, and can only be established by trial and

error and experience: a setting of medium to high

should serve as a good initial guide.

PLEASE NOTE: The control knob must not be

set below the first indicating bar (55°C).

HIGH LIMIT THERMOSTAT

Your boiler is fitted with a high limit cut out thermostat,

designed to protect the central heating system in the event of the

boiler running beyond a safe temperature level due to a control mal-

function. This is indicated by excessive operating temperature and

the mains power indicator lamp going off. The thermostat will reset

itself when the boiler cools to a safe operating level.

MANUAL RESET OVERHEAT

THERMOSTAT

Sealed system installations require the use of an overheat ther-

mostat which has to be reset by hand. Your boiler is fitted with this

thermostat as standard and may be reset by pressing the button

shown in Fig. 2. Access is gained by removing the case front panel. If

the thermostat persistently cuts out then your boiler requires atten-

tion and you should either call your installer or a service engineer.

The control knob has a range of adjustment as indi-

cated by the symbols.

Fig. 3.

Low

Setting

High

Setting

TEMP