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Fan control with On/Off
heating/cooling control
Reference table with
On/Off control
1-speed/3-speed fan
A6V11545892_en--_c
In 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
switching differential (SDH/SDC) via a reference 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)
SDH/SDC
[K]
0.5
XpH
/XpC
[K]
2
Fan
Fan
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.
/XpC
Fan
X
dz
XpH
Fan
XpC
Fan
high (P355)
med (P354)
Fan_max
speed (P359 for heating & P360 for
cooling)
Fan_med
speed
(P358)
Fan_min
speed (P357)
1.0
1.5
2.0
2.5
3
4
5
6
Functions
Fan control
) is defined by the
Fan
Dead zone (P055)
Switching range for fan
"Heating" (Table)
Switching range for fan
"Cooling" (Table)
Fan 3-speed switching point
Fan 3-speed switching point
Max. DC 0...10 V fan
Med. DC 0...10 V fan
Min. DC 0...10 V fan
3.0
3.5
4.0
>4.5
7
8
9
10
107 | 180
4
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