Beretta MySmart 28 C.S.I. Para El Instalador página 12

ENGLISH
The compensation curve for heating maintains a theoretical
temperature of 20°C indoors, when the external temperature is
between +20°C and -20°C. The choice of the curve depends on
the minimum external temperature envisaged (and therefore on the
geographical location), and on the delivery temperature envisaged
(and therefore on the type of system). It is carefully calculated by the
installer on the basis of the following formula:
Design delivery temp - Tshift
KT =
20 - Design min outside temp
Tshift = 30 °C standard system
25 °C floor system
If the calculation produces an intermediate value between two
curves, you are advised to choose the compensation curve nearest
the value obtained.
Example: if the value obtained from the calculation is 1.3, this is
between curve 1.0 and curve 1.5. Choose the nearest curve, i.e. 1.5.
Selection of the KT must be made by acting on the P3 trimmer on the
card (see multi-wire electrical diagram).
To access P3:
1. remove the shell,
2. turn the instrument panel upside down
- remove the electrical parts inspection cover, undoing the 2 fixing
screws
b
Live electrical parts.
The following KT values can be set:
- standard system: 1.0 - 1.5 - 2.0 - 2.5 - 3.0
- floor system: 0.2 - 0.4 - 0.6 - 0.8
and they will be shown on the display for about 3 seconds after the
P3 trimmer is turned,
TYPE OF HEAT REQUEST
If an ambient thermostat is connected to the boiler (JUMPER
JP6 not on) (fig. 41)
The heat request is made by the closure of the room thermostat
contact, while the opening of the contact produces a switch-off.
The delivery temperature is automatically calculated by the boiler,
although the user may interact with the boiler. Using the interface to
modify the HEATING, you will not have the HEATING SET-POINT
value available, but a value that you can set as preferred between
15 and 25°C. The modification of this value will not directly modify
the delivery temperature, but will automatically affect the calculation
that determines the value of that temperature, altering the reference
temperature in the system (0 = 20°C).
If an hourly timer is connected to the boiler (JUMPER JP6 not
on) (fig. 42)
With the contact closed, the heat request is made by the delivery
probe, on the basis of the external temperature, to obtain a nominal
ambient temperature on DAY level (20°C). The opening of the contact
does not produce a switch-off, but a reduction (parallel translation) of
the climatic curve on NIGHT level (16°C).
This will activate the night time function.
The delivery temperature is automatically calculated by the boiler,
although the user may interact with the boiler.
Using the interface to modify the HEATING, you will not have the
HEATING SET-POINT value available, but a value that you can set
as preferred between 15 and 25°C.
The modification of this value will not directly modify the delivery
temperature, but will automatically affect the calculation that
determines the value of that temperature, altering the reference
temperature in the system (0 = 20°C for DAY level, and 16°C for
NIGHT level).
If the boiler is connected to a remote control (like BeSMART),
when the heat request is made by the REC remote control, the
thermoregulation is managed by the remote control (refer to the
specific instruction manual for this product).
12
4.7 Adjustments
All boiler regulations and calibrations should be carried out
directly and only on the instrument panel in the boiler.
To do this, remove the connection of the remote control panel
by separating the front of the fixing base. After this operation
the knobs of the boiler are active.
The boiler has already been adjusted by the manufacturer. However, if
adjustments must be repeated, for example after special maintenance,
replacement of the gas valve or conversion from methane gas to
LPG or propane air, observe the following procedures.
The adjustment of the maximum and minimum output, the maximum
heating and slow ignition, must be made strictly in the sequence
indicated, and by qualified personnel only:
1. disconnect the boiler power supply
2. turn the heating water temperature selector to its maximum,
selector in correspondence to "+" (fig. 42)
3. lift and then turn the instrument panel upside down
4. remove the electrical parts inspection cover, undoing the 2 fixing
screws
5. insert jumpers JP1 and JP3 (fig. 43)
6. power the boiler.
"ADJ" will appear on the display for about 4 sec.
Modify the following parameters:
7. absolute/domestic maximum
8. minimum
9. maximum heating
10. slow ignition
as described below:
11. turn the heating water temperature selector to set the desired
value
12. press the CO button (fig. 44) and move on to calibration of the
next parameter.
b
Live electrical parts.
The following icons will appear on the display:
1. during absolute/domestic maximum calibration
2. during minimum calibration
3. during heating maximum calibration
4. during slow ignition calibration
End the procedure removing jumpers JP1 and JP3 to store the set
values.
the function can be terminated at any time without storing the set
values and maintaining the previously set ones:
- removing jumpers JP1 and JP3 before all 4 parameters have been
set
- turning the mode selector to
- disconnecting the mains voltage.
- 15 minutes after activation.
b
Th e calibration does not entail the ignition of the boiler.
b
By rotating the heating setpoint selector knob, the number
of rotations expressed in hundreds (e.g. 25 = 2.500 rpm) is
automatically displayed.
The calibration parameter display function is activated with the
selector on summer or winter and pressing the CO button on the
card regardless of whether or not there is a heat request.
The function cannot be activated if a remote control is connected.
When this function is activated, the calibration parameters each
appear (in the order shown below) for 2 seconds. The relative icon
is indicated in line with each parameter, and the fan rotation value
(expressed in hundreds)
1. Maximum
2. Minimum
3. Maximum heating
4. Slow ignition
5. Adjusted maximum heating
OFF/RESET.