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4
3.
TO LIGHT THE BOILER
3.1
Switch the mains power ON and the boiler LED display will show “AP”. This puts the
boiler into the Air Purge Mode. See Figure 2.
3.2
Press the reset button “K4” twice. The boiler will go onto standby. This is the winter
mode.
SETTING THE DHW WATER TEMPERATURE
3.3
To set the hot water temperature press and hold “K7”, this will flash until the °C
temperature shows. By pressing the + and - buttons to set the desired temperature. The
temperature flashes 5 times to set the temperature and then goes back onto standby.
SETTING THE CH WATER TEMPERATURE
3.4
To set the central heating temperature press and hold “K1”, this will flash until the °C
temperature shows. By pressing the + or - buttons to set the desired temperature.
The temperature flashes 5 time to set the temperature and the display will go back to
standby.
4.
OPERATING FUNCTIONS
4.1
OPERATING THE DOMESTIC HOT WATER
When the call for hot water is needed the boiler will fire. The display will show the full
flame, tap and the set water temperature. This will flash until the need for hot water is
satisfied. See Figure 4.
4.2
OPERATING THE CENTRAL HEATING
When the boiler fires in CH mode it fires for 1 minute, modulating the boiler. The display
will flash showing the radiator, the small flame and temperature. The flame symbol
increases with the demand for heat. Once temperature is reached the display will go
back to standby. See Figure 5.
Approximate flow temperatures for the boiler thermostat settings are:
4.3
DISPLAY CODES
In normal operation the boiler LED display will show codes:
1.
Standby - no demand for heat.
2.
CH being supplied.
3.
DHW being supplied.
4.
Boiler frost protection - boiler will fire if temperature is below 5°C.
5.
During normal operation the burner on indicator will remain illuminated when the burner is lit.
Note:
If the boiler fails to light after five attempts the fault code will be displayed.
4.4
TO SHUT DOWN THE BOILER
Set the mode to OFF by pressing K4.
To relight the boiler repeat the procedure detailed in ‘To light the boiler’.
4.5 FROST
PROTECTION
If no system frost protection is provided and frost is likely during a short absence from home, leave the
heating controls (if fitted) at a reduced temperature setting. For longer periods, the entire system should be
drained.
If the system includes a frost thermostat then, during cold weather, the boiler should be turned OFF at the
time switch (if fitted) ONLY. The mains supply should be left switched ON, with the boiler thermostat left in
the normal running position.
TABLE. 2
Button Setting
CH Flow Temperature
Minimum
40°C
Maximum
60°C
FIGURE 2
FIGURE 3
FIGURE 4
FIGURE 5
