Technical data

The diagrams below show the control sequence for 2-position control.
Heating mode with manual selection
(P01 = 2)
Cooling mode with manual selection
(P01 = 2)
Y
½ SDC
1
0
½ SDC
w
3076D13
T[°C]
Y2
Heating and cooling mode (P01 = 04)
Y
½ SDC
1
0
½ SDC
w
3076D11
T[°C]
Y2
½ SDH ½ SDH
Y1
½
x
dz
½
x
dz
T[°C] Room temperature
w Room temperature setpoint
Y1 Control command "Valve" or "Comp." (H)
Y2 Control command "Valve" or "Comp." (C)
SDH Switching differential "Heating" (P30)
SDC Switching differential "Cooling" (P31)
X
dz
Dead zone (P33)
• The diagrams only show the PI thermostat’s proportional part.
• For the fan sequence see section 3.8.
Setting the sequence and the control outputs
Refer to sections 3.4 "Applications", 3.6.1 "Sequences", and 3.7 "Outputs".
3.6.6 Chilled / heated ceiling and radiator applications
For chilled / heated ceiling and radiator,
• set the corresponding basic application
• disable the fan (P52)
The following applications are available:
Application for
chilled / heated ceiling, radiator
Set basic application
See
section
Sequences
Chilled / heated ceiling with
changeover
2-pipe 3.6.3
H ( \ )
C ( / )
Chilled / heated ceiling & el heater
(cooling only: disable el heater
via P13)
2-pipe and electric heater 3.6.4
El H + H (  \ \ )
El H + C (

\ / )
C ( / )
Chilled ceiling and radiator
4-pipe 3.6.5
H + C ( \ / )
½ SDH
1
0
½ SDH
w
Y
3076D01
T[°C]
Y1
ON/OFF control
Note:
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Siemens RDF301, RDF301.50..., RDF600KN Basic documentation CE1P3171en
Building Technologies Functions 2014-05-23