4.9.4.
Connecting the room thermostat
n
Connecting modulating controller
OT
OpenTherm
regulator
The boiler is fitted with a
OpenTherm
connection as standard.
As a result, modulating
OpenTherm
room controllers can be
connected without any further adjustments. The boiler is also suitable
for
OpenTherm Smart Power
.
4
Install the regulator in the reference room (generally the living
room).
4
Connect the two-wire cable to terminals
On/off-OT
of the
connector.
If the tap water temperature can be set on the
OpenTherm
controller, then the boiler supplies this
temperature, with the set value on the boiler as the
maximum.
n
Connect on/off thermostat
Tk
ON/OFF room thermostat
The boiler is suitable for connection to a 2 wire on/off room thermostat.
4
Install the regulator in the reference room (generally the living
room).
4
Connect the 2 wire 24V room thermostat to the
On/off-OT
terminals of the connector.
4
Connect the power stealing thermostat to the
On/off-OT
terminals
of the connector.
If a room thermostat with an anticipation element is used,
this must be converted using parameter
p5
.
T000776-D
On/off
OT
BL
RL
Tout
Tdhw
OT
On/off
Tou
t
Tdhw
BL
RL
OT
T001590-B
Tk
OT
On/off
Tou
t
Tdhw
BL
RL
On/off
OT
BL
RL
Tout
Tdhw
4. Installation
Calenta 25s - 28c - 35s - 40c
42
040412 - 7600585-01
