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Siemens RDF301, RDF301.50, RDF600KN Basic documentation CE1P3171en
Building Technologies Functions 2012-10-04
ON/OFF control
The diagrams below show the control sequence for 2-position.
Heating mode
(automatic changeover = heating or heating only)
Cooling mode
(man. / auto. changeover = cooling or cooling only)
Y
½ SDH
1
0
½ SDH
w
3076D06
T[°C]
Y1
½ SDH
½ SDH
YE
w
D
Y
½ SDC
1
0
½ SDC
w
3076D05
T[°C]
Y1
½ SDH
½ SDH
YE
x
dz
Heating mode with manual changeover (P01 = 2)
(manual changeover = heating)
T[°C] Room temperature
W Room temperature setpoint
Y1 Control command “Valve” or “Compressor”
YE Control command “Electric heater”
SDH Switching differential “Heating” (P30)
SDC Switching differential “Cooling” (P31)
X
dz
Dead zone (P33)
½ SDH
1
0
½ SDH
w
Y
3076D07
T[°C]
YE
w
D
Setpoint differential (P34)
The diagrams only show the PI thermostat’s proportional part.
For the fan sequence see section 3.8.
For better temperature control performance with 2-pos electrical heater, we
suggest to set the switching differential heating (P30) to 1K
Setting the sequence and the control outputs
Refer to sections 3.4 "Applications", 3.6.1 "Sequences", and 3.7 "Outputs".
Control se
quence
ON/OFF output
Notes:
33


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