User Manual

Functions
Additional functions
4
A6V11545892_en--_a 45 | 146
The swap function optimizes the use of heating/cooling energy in mixed systems.
For example, when the fan coil units are combined with radiant heating/cooling
panels, it is more appropriate to start heating with the panels (1
st
stage heating,
YHC1) and start cooling using the fan coil unit (1
st
stage cooling, YHC2).
Enable the swap function by setting P254 (YHC2 output signal, 1
st
stage in cooling)
to ON, depending on the requested control signal.
Swap function disabled Swap function enabled
P254 is set to OFF P254 is set to ON
● For 2-pipe/2-stage applications, see 2-pipe/2-stage heating or cooling [➙ 62].
● If the equipment requests fan operation only in the 2
nd
stage (heating and/or
cooling), see Fan control [➙ 81] to set up the fan function (fan in the 2
nd
stage).
● For application examples, see Swap function and/or fan in the 2
nd
stage
[➙ 134].
All heating sequences can also be used for floor heating.
You can use fan coil unit heating/cooling sequences for floor heating or cooling by
disabling the fan via P350.
The following functions allow the control of external equipment connected to the
Q1, Q2 and Q3 relay outputs:
Function description P40X =
No function 0
Switching off external equipment when the thermostat is in
Protection mode
1
Switching on external equipment during…
● heating/cooling demand
● heating demand
● cooling demand
2
3
4
Energizing the contact when…
● the heating sequence is active
● the cooling sequence is active
5
6
Humidity control:
● Output to control dehumidifier
● Output to control humidifier
7
8
● When P351 = 1 and 2, these functions are not available.
● When fan is DC 0...10 V fan (P351 = 3) or fan is disabled (P350 = 0) and
related relays are not occupied by output (configure 1 stage or 2 stage as
On/Off on RDG260KN), these functions are available.
● Do not use these functions in combination with On/Off valve control
(P201/P203 = 2 / 4 or P204 = 4) to ensure temperature control accuracy. If
Note
Floor heating/Floor cooling
(P350)
Qx relay switching
function (P400, P401,
P402)
Note