Room sensor
VVM 225 is supplied with a room sensor enclosed
(BT50). The room sensor has a number of functions:
1.
Shows current room temperature in the display on
VVM 225.
2.
Option of changing the room temperature in °C.
3.
Provides the option of fine-tuning the room temper-
ature.
Install the sensor in a neutral position where the set
temperature is required. A suitable location is on a free
inner wall in a hall approx. 1.5 m above the floor. It is
important that the sensor is not obstructed from meas-
uring the correct room temperature by being located,
for example, in a recess, between shelves, behind a
curtain, above or close to a heat source, in a draft from
an external door or in direct sunlight. Closed radiator
thermostats can also cause problems.
The indoor module operates without the sensor, but if
one wishes to read off the accommodation's indoor
temperature in VVM 225's display, the sensor must be
installed. Connect the room sensor to X6:3 and X6:4 on
the input board (AA3).
If the sensor is to have a controlling function, it is activ-
ated in menu 1.9.4.
If the room sensor is used in a room with underfloor
heating, it should only have an indicatory function, not
control of the room temperature.
External
VVM225
AA3-X6BT50
Caution
Changes of temperature in accommodation
take time. For example, short time periods in
combination with underfloor heating will not
give a noticeable difference in room temperat-
ure.
COMMUNICATION
If VVM 225 is to be connected to the heat pump, it is
connected to terminal blocks X4:13, X4:14 and X4:15
on the input board (AA3).
VVM 225 and F2040 / NIBE SPLIT HBS 05
AA23-X4
B
A
GND
B
A
GND
5
4
3
2
1
6
Inomhusmodul
AA3-X4
B
GND
A
14
13
12
11
10
15
F2040 / HBS 05
VVM 225 and F2120
Inomhusmodul
F2120
AA3-X4
AA2-X23
AA2-X22
3
2
1
4
GND
GND
A
A
B
GND
A
B
B
3
2
1
4
14
13
12
11
10
15
NIBE VVM 225Chapter 5 | Electrical connections26
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