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SECTION 7 - CHECKS, ADJUSTMENTS AND FAULT FINDING
7.1 CHECKING APPLIANCE OPERATION
When carrying out any repairs or servicing to the appliance, the
relevant commissioning procedure must be undertaken to ensure
the continued safe operation of the appliance. Particular attention
should be made to ensure gas tightness, water tightness, and the
electrical integrity of the appliance.
7.2 APPLIANCE MODES OF OPERATION
NOTE
There must be sufficient system water pressure (min. 0.5 bar) to
ensure the water pressure switch is activated. If there is insufficient
system pressure the pump and fan will be prevented from operating
and the low-pressure fault indicator will be displayed.
7.2.1 SELECTOR SWITCH IN THE OFF POSITION
When the boiler is in the STANDBY position, (see fig. 2) are displayed.
Active functions:
Frost-protection system
●
Pump anti-block
●
Valve actuator anti-block.
●
7.2.2 BOILER "ON" IN HEATING MODE
When boiler is in the Heating position (see fig. 2) and the appliance
is active for both heating and DHW requests.
Active functions:
DHW pre-heat
●
Booster function
●
Frost-protection system
●
Pump anti-block
●
Valve actuator anti-block.
●
7.2.4 BOILER "OFF" IN HEATING MODE
When the function switch is in the DHW position, (see fig. 2) and
the appliance is active for DHW requests.
Active functions:
TSC function
●
Frost-protection system
●
Pump anti-block
●
Valve actuator anti-block.
●
7.2.6 APPLIANCE FUNCTIONS
Comfort button: by pressing the
●
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 temperature from 35 °C to 45 °C
with a 0,5 °C correction. In order to change this temperature, after
selecting the function, press the
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.
Comfort button
Fig. 37
button, Comfort function
button and turn the selector A.
A
Memory key: by pressing the
●
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 22
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, Me-
mory 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.
SARA function: while adjusting the heating temperature, from the
●
minimum value 40°C to the maximum value 80°C, the field where
the H.T.C. system enables is met: Heating Temperature Control
(from 55°C to 65°C).
The H.T.C. system autonomously manages the delivery tempera-
ture, adapting the boiler's operation to meet the dwelling's real
needs.
When the heat need extends, the delivery temperature increases
allowing a faster heating of the environment.
Once the desired comfort is reached, the system restores the
delivery temperature to the value set at the beginning. All this as-
sures minor consumptions, minor limestone deposits in the boiler
and minor thermal ranges in the radiators.
Touch & Go Function: if you don't wish to keep the Memory
●
function always enabled or if you need hot water to be ready fast
Memory button
button, Memory function enables
, at 6.30 a.m., the boiler performs the pre-
nd
SARA function
23
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