User Manual

Functions
Fan control
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On applications with On/Off control:
1. The switching point for low fan speed is synchronized to the heating/cooling
output. P353 (switching point fan speed low) is not relevant.
2. The maximum switching range of the fan (XpH
Fan
/XpC
Fan
) is defined by the
switching differential (SDH/SDC) via a look-up table.
Heating/cooling
1- or 3-speed fan
DC 0...10 V fan
T [°C] Room temperature
w Room temperature setpoint
Q Fan speed
Y Control command "Valve"
SDH Switching differential
"Heating" (P051)
SDC Switching differential
"Cooling" (P053)
X
dz
Dead zone (P055)
XpH
Fan
Switching range for fan
"Heating" (Table)
XpC
Fan
Switching range for fan
"Cooling" (Table)
Fan 3-speed switching point
high (P355)
Fan 3-speed switching point
med (P354)
Fan_max Max. DC 0...10 V fan
speed (P359 for heating &
P360 for cooling)
Fan_med Med. DC 0...10 V fan
speed
(P358)
Fan_min Min. DC 0...10 V fan
speed (P357)
SDH/SDC [K] 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 >4.5
XpH
Fan
/XpC
Fan
[K] 2 3 4 5 6 7 8 9 10
The thermostat can control a 1- or 3-speed fan (selected via P351). A 1-speed fan
is connected to terminal Q1, and a 3-speed fan to terminals Q1, Q2 and Q3.
Fan speed I = min. fan speed selectable via P357
Fan speed II = middle fan speed selectable via P358
Fan control with On/Off
heating/cooling control
Look-up table with On/Off
control
1-speed/3-speed fan
Manual operation
DC 0...10 V fan