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BRA2 - BRN2 EN
OUTSIDE AIR PROBE (BT3) (Accessory)
The outside air probe allows the system water temperature
set point to be compensated during heating or cooling opera-
tion.
Installation instructions
The outside air probe must be installed:
• outside of the home
• not in direct sunlight, away from flue gas discharges, air
outlets, or doors and windows.
• on a perimeter wall facing north/north-west
• at a minimum height of 2.5 metres above the ground or at
most half way up the house.
Mounting method:
• Open the cover of the sensor.
• Attach a probe to the wall and the correct position as
described above.
• For the electrical connections see “Connection diagram”.
• Re-place the cover of the sensor.
TECHNICAL DATA
Sensing element NTC 10Kohm ± 1% (25°C)
Degree of protection IP65
Perm. ambient / carriage temperatur
e -50°C...+100°C
Measuring range -50°C...+100°C
Materials PA 15% GK, Colour RAL 9010
REMOTE KEYPAD KIT (A5) (Accessory)
The remote keypad kit can be used to display all unit func-
tions and access the parameters of the electronic board
from a point located at some distance from the unit itself.
It consists of a remote control module.
To install the kit, proceed as follows:
- access the unit’s electrical panel after having disconnect-
ed the power supply;
- connect the remote control module with 3 wires to termi-
nals 22, 23 and 24 on the installer terminal block:
- terminal 22 connected to the GND terminal on the module;
- terminal 23 connected to the Signal terminal on the mod-
ule;
- terminal 24 connected to the +12V DC terminal on the
module;
FLOW SWITCH CONNECTION (F3)
The system flow switch must be connected to terminals 18
and 19.
If this is not connected, the unit will not be able to operate
and the controller will display alarm code ER20 (see "Dis-
playing alarms").
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