Connecting The Room Thermostat - REMEHA Calenta 25s Installation And Service Manual

4. Installation
On/off
OT BL RL Tout Tdhw
On/off
OT BL RL Tout Tdhw
42
4.9.4.
n Connecting modulating controller
OT
OT
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.
T000776-D
n Connect on/off thermostat
Tk
The boiler is suitable for connection to a 2 wire on/off room thermostat.
Tk
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.
T001590-B

Connecting the room thermostat

OpenTherm regulator
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.
ON/OFF room thermostat
If a room thermostat with an anticipation element is used,
this must be converted using parameter p5.
Calenta 25s - 28c - 35s - 40c
040412 - 7600585-01