4.9.5.
Connecting the outside temperature
sensor
Ba
Outside sensor
An outside sensor can be connected to the
Tout
terminals of the
connector. Where there is an on/off thermostat controller, the boiler
will control the temperature with the set point of the internal heating
curve.
A OpenTherm controller can also use this outside sensor.
The heating curve required must then be set on the
controller.
n
Heating curve setting
If an outside temperature sensor is connected, it is possible to adapt
the heating curve. The setting can be modified using parameters
p1
,
p"5
,
p"6
and
p"7
.
4.9.6.
Connect frost protection
n
Frost protection in combination with on/off thermostat
If an on/off thermostat is used, it is advisable to protect any rooms
where there is risk of frost by using a frost thermostat. The radiator
valve in a room where there is a risk of frost must, however, be open.
4
In rooms where there is a risk of frost, a frost thermostat (
Tv
)
should preferably be installed.
4
Connect the frost thermostat in parallel with an on/off room
thermostat (
Tk
) to the
On/off-OT
terminals of the connector.
When using a
OpenTherm
thermostat, a frost thermostat
cannot be connected in parallel to the
On/off-OT
terminals. Implement frost protection for the central heating
system in combination with an external sensor.
T001591-B
Ba
OT
On/off
Tou
t
Tdhw
BL
RL
On/off
OT
BL
RL
Tout
Tdhw
R000038-A
0
10
20
-20
-10
10
30
70
50
90
F
T000778-C
On/off
OT
RL
BL
Tout
Tdhw
Tk
Tv
Calenta 25s - 28c - 35s - 40c
4. Installation
040412 - 7600585-01
43
