18
Final user level 2
programming block
Input function terminal 3-4
This block (1) can be activated to display all the parameters without
modifying them. Pressing buttons
or
displays
“OFF”
.
WARNING:
The activation block can be deactivated temporarily by pressing buttons
and
simultaneously; a confirmation sign appears on the display.
At this point press simultaneously the buttons
and
for at least 5
seconds.
To permanently remove the activation block, set parameter 63 on 0.
The freely programmable input (terminals 3-4) allows three different functions
to be activated. The parameter has the following significance:
1
= If an external sensor is connected, the display will show the temperature
of the external sensor ( _ _ = no sensor connected, function disabled).
2
= With an external contact, it is possible to switch-over to "reduced pre-
set value of the ambient temperature".
3
= With an external contact, it is possible to switch-over to "reduced pre-
set value of the antifreeze ambient temperature" (short circuit 0 0 0 or
interruption _ _ _ ). The display shows the current status of the external
contact.
64
63
SERVICE VALUES
DOMESTIC HOT WATER SETTINGS
Reduced domestic hot
water pre-set value
Domestic hot water load
The reduced pre-set value of the temperature of the domestic hot water allow
the required water temperature to be obtained outside the programmed
usage times (daily programme 8).
0
= 24 hours/ day - Hot water is always available at the temperature set
with user parameter n°3.
1
= standard - Hot water according to the daily heating programme.
In the comfort areas of heating the temperature of the boiler unit is regu-
lated to the value set with user parameter n° 3.
In the reduced areas of heating the temperature of the boiler unit is
regulated to the value set with parameter n° 61 of the service level.
2
= service disconnected
3
= second daily programme (8) - Every day of the week the temperature of
the hot water is set according to programme 8. In this case there is a
single programming for all the days of the week and three time zones are
available. In the time spans set the temperature of the boiler unit is regu-
lated according to that set in parameter n°3. In the remaining hours the
boiler unit is controlled to the temperature set with parameter n° 61 the
of service level.
62
61
Operating mode of external contact
External and ambient
sensor influence
Anti-bacterial function
(with storage capacity boiler unit)
If the entrance (terminals 3 and 4 of the base) is connected to a zero potential
external contact (parameter 64 = 2 or 3), the operating mode of the contact
can be determined (remote telephone switch or window contact). The operating
mode specifies the status of the contact in which the required function is active.
Display:
Operating mode closed (short circuit)
0 0 0
Operating mode open (interruption)
_ _ _
Determines the mix ratio between the internal and external ambient sensor
when parameter 64 = 1.
0 %
= internal sensor only active (0% external - 100% internal)
50 %
= mean value of ex internal sensor
100 %
= external sensor only active
The set mix is used for ambient control and display.
If the external sensor is short circuited or interrupted, the operation conti-
nues with the internal sensor.
This function allows the hot water to be brought to a high temperature once
a week in order to eliminate eventual pathogenic agents.
It is active every Monday for a maximum duration of 2.5 hours at a delivery
temperature of 65°C.
0 = not active 1 = active
65
66
69
