User Manual

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Siemens RDF302 Basic documentation CE1P3079en
Smart Infrastructure 2020-12-01
The diagrams below show the control sequence for 2-position control.
Heating mode with manual selection
(P01=2) or
for P09 >= P10 in heating sequence *)
Cooling mode with manual selection
(P01=2) or
for P09 >= P10 in cooling sequence *)
Y
½ SDC
1
0
½ SDC
w
3
0
7
6
D
1
3
T[°C]
V2
Heating and cooling mode (P01 = 04)
Y
½ SDC
1
0
½ SDC
w
3
0
7
6
D
1
1
T[°C]
V2
½ SDH ½ SDH
V1
½x
dz
½x
dz
T[°C] Room temperature
w Room temperature setpoint
V1 Control command “Valve” or “Comp.” (H)
V2 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.
Setting the sequence and the control outputs
Refer to sections 3.4 "Applications", 3.6.1 "Sequences", and 3.7 "Outputs".
ON/OFF control
Note:
½ SDH
1
0
½ SDH
w
Y
3076D01
T[°C]
V1