Three-Way Mixing Valve; Programming Parameters - Beretta CONNECT AT LE Installer And User Manual

Proportional head
The circulator works on the basis of the heat request made by the system. The
working point of the circulator and the selected proportional head curve move on
the basis of the heat request.
PP1
PP1 LOW proportional head curve
PP2 AVERAGE proportional head curve
PP3
HIGH proportional head curve
Constant head
The circulator works at constant head, irrespective of the heat
ing point of the circulator will move along the selected curve on the basis of the
heat request.
CP1
CP1
LOW constant head curve
CP2 AVERAGE constant head curve
CP3 HIGH constant head curve
Constant curve
The circulator works at constant speed, irrespective of the heat request from the
system. The working point of the circulator will move along the selected curve on
the basis of the heat request.
C1 C2
C1 Curve 1 = 4 metres
C2 Curve 2 = 5 metres
C3
Curve 3 = 6 metres
C4
Curve 4 MAX = 7 metres
PP2 PP3
request.
CP2 CP3
C3 C4
Checking the circulators
When starting up for the first time and at least once a year, it is advisable to check
that the shaft of the circulators rotate.This is necessary because, especially after
lengthy periods of inactivity, deposits and/or residue may stop it rotating freely.
Releasing the circulation unit shaft if necessary
To release the shaft, proceed as follows:
- insert a screwdriver (Phillips n° 2) into the hole (1) of the circulator,
- press (a) and turn (b) the screwdriver until the motor shaft releases.
The work-
Take great care when carrying out this operation so as not to damage the com-
ponents.
Do not run the circulators without water.
5

THREE-WAY MIXING VALVE

If the unit has been inactive for a lengthy period of time and the MIXER VALVE
is stuck, activate the lever in the motor by hand, in order to release the gate in
the valve.
6

PROGRAMMING PARAMETERS

To set the parameters for working with the Connect AT/BT LE:
- access the boiler's programmable parameters as indicated in the "programming
parameters" chapter of the boiler's instruction manual.
Heating mode
Select parameter 20 (heating mode), choose option 6 (Connect AT/BT LE) and
confirm it.
Responsiveness of the external sensor
Select parameter 65 (responsiveness of the external sensor) to suit the needs and
characteristics of the installation, as described in the boiler manual.
CONFIGURING THE HIGH TEMPERATURE CIRCUIT
Activate the thermoregulation function on the high temperature circuit
Select parameter 44 (Thermoregulation function) and check that the factory setting
is 1 (AUTO).
If not, select the value 1.
Activate the climatic curve slope on the high temperature circuit
Access parameter 45 (slope on the climatic curve) and choose one of the curves
available as the climatic curve to be used for the high temperature system (see
graph) to suit the installation characteristics and the climatic conditions in the geo-
graphical area (see the "Thermoregulation setting" paragraph in the boiler manual).
Selecting the heating MAX Set Point for the high temperature circuit
Access parameter 21 (MAX Set Point) and select the value chosen to suit the
needs and characteristics of the installation and the climatic curve set previously
(also see the boiler manual).
17
1
a
b