Nibe SMO 20 - Setting the Indoor Climate; Temperature Settings

OUTSIDE SENSOR
Install the outdoor temperature sensor (BT1) in the
shade on a wall facing north or north-west, so it is unaf-
fected by the morning sun for example.
Connect the sensor to terminal block X2:3 and X2:6.
Use a twin core cable with a cable area of at least
0.5 mm².
If a conduit is used it must be sealed to prevent condens-
ation in the sensor capsule.
SMO Externt
5
6
7
2
1
4
3
ExternalSMO20
X2
BT1
LEK
L N 1 1 0 2 3 4PE
21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
X2
5
6
7
2
1
8
9
13
12
4
3
11
10
19
20
21
14
18
16
17
15
ROOM SENSOR
SMO 20 can be supplemented with a room sensor
(BT50). The room sensor has a number of functions:
1.
Shows current room temperature in the control
module display.
2.
Provides the option of changing the room temperat-
ure 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 prevented 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 control module operates without the sensor, but if
you want to read off the home’s indoor temperature in
the control module’s display, the sensor must be in-
stalled. Connect the room sensor to terminal block X2:7
and X2:10.
If the sensor is to be used to change the room temper-
ature in °C and/or to fine-tune the room temperature,
the sensor must be activated 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.
SMO Externt
9
10
11
6
8
7
ExternalSMO20
X2
BT50
LEK
L N 1 1 0 2 3 4PE
21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
X2
5
6
7
2
1
8
9
13
12
4
3
11
10
19
20
21
14
18
16
17
15
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.
NIBE SMO 20Chapter 5 | Electrical connections22