5
2.1 BEFORE SWITCHING ON
Before switching the appliance on please familiarise your-
self with:
- how to isolate the appliance from the gas, water and electricity
supplies;
- how to check and top-up – if necessary – the system water
pressure;
- any external thermostats/time switches and their functions;
- the appliance controls.
2.2 APPLIANCE CONTROLS (see fig. 1)
The appliance controls are on the front cover.
The appliance is equipped with a simple control panel that can
be used to alter or control the following functions:
- ON/OFF selection;
- mode of operation;
- the outlet flow temperature to the central heating system;
- the outlet temperature for domestic hot water.
In addition, the large LCD display shows the status of the appliance:
- current mode of operation;
- current appliance temperature;
- current temperatures selected;
- current system water pressure.
The system water pressure display shows the current pressure of
the system, and when the appliance is operating the display may
rise or fall, this is quite normal. The minimum permissible level for
the safe and efficient operation of the appliance is 0.6 BAR. Should
the pressure fall below 0.6 BAR, the boiler may lockout.
Depending on the type of controls specified by your installer you
may have an external time clock or programmer fitted, please refer
to the instructions supplied with such.
2.3 LIGHTING THE BOILER
Ensure the electrical supply to the appliance is switched on. Press
the ON/OFF switch to switch the appliance ON (indicated by active
display), ensure any external controls are switched to an ‘ON’
position and are calling for heat.
After being powered, the boiler begins an automatic vent cycle
lasting approximately 2 minutes. The display indicates “sf” and the
“function selection indicators” light up in sequence. Press the
MODE button to interrupt the automatic vent cycle.
Press the heating button, the appliance will now operate in the
Heating mode.
2.3.1 MODES OF OPERATION
When the appliance is switched ON one of two modes of operation
can be selected:
- boiler “ON” (heating mode on);
- boiler “OFF” (heating mode off - domestic hot water on).
BOILER “ON” IN HEATING MODE
When boiler is in the
Heating
position, the appliance is active for
both heating and DHW requests.
The booster function and pre-heat function are active.
BOILER“OFF”(heating mode off - domestic hot water on)
When the function switch is in the
DHW
position, the appliance is
active for DHW requests.
The TSC (Temperature Stability Control) function is active. All
heating requests will be ignored.
2.3.2 FUNCTIONS
- TSC: when the TSC function is active the appliance may over-
ride the selected DHW temperature in order to maintain
temperature stability.
- Comfort button: by pressing the button, Comfort function
enables and the correspondent symbol is displayed.
By pressing the button, domestic hot water is supplied at the
ideal temperature for shower; the
standard temperature set is actually
40 °C.
It is possible to modify Comfort tem-
perature from 35 °C to 45 °C with a
0,5 °C correction. In order to change
this temperature, after selecting the
function, press the button and turn
the selector A.
The set temperature is displayed.
Comfort function avoids searching
for the right mix between hot and
cold water in order to obtain the right
temperature for shower.
Note
The value set is memorized by the
boiler, so that, the next time you
select Comfort button, the boiler
should be ready to supply the water at the desired temperature.
-Memory key: by pressing the button, Memory function
enables and the correspondent
symbol is displayed.
Memory function simultaneously
enables a double electronic
intelligence:
• domestic hot water intelligence
• heating intelligence.
DHW Memory
By enabling Memory button, the
intelligence of the machine begins
to memorize the usage habits of
the user. After only one week,
Memory function would have
already learned the user’s habits
of using domestic hot water and
therefore should be able to pre-
heat it for each request.
The pre-heating is performed in the
half hour before the request made in the day and at the hour
memorized the week before.
Example
Thursday 15th at 7.00 a.m. a domestic hot water request is made.
Next Thursday, the 22nd, at 6.30 a.m., the boiler performs the pre-
heating of domestic hot water.
When the user makes the hot water request at 7.00 a.m., finds the
water already at the desired temperature.
If it is necessary to have pre-heated water besides the usual
habits, please use the Touch & Go function.
In case the boiler lacks power supply, the data memorized by
this function will be lost. When the boiler is power supplied again,
Memory function restarts to memorize the habits. In order to
benefit by the advantages off Memory function, you have to wait
for one week to pass.
CH Memory
By enabling Memory button, the boiler takes in consideration the
time that passes from ignition and after 10 minutes increases the
delivery temperature memorized with 5 °C.
Memory repeats the cycle until the room temperature set on the
room thermostat is reached or until the maximum temperature
allowed is reached.
Due to this automatic function, it is possible to select lower
delivery temperatures and at the same time to reduce the time for
reaching the set room temperature.
⇒ page 8
GETTING STARTED
A
Comfort button
Memory button
fig. 2
fig. 3