Chilled / Heated Ceiling And Radiator Applications - Siemens RDF301 Basic Documentation

ON/OFF control
Note:
Setting the sequence and the control outputs
Application for
chilled / heated ceiling, radiator
Chilled / heated ceiling with
changeover
Chilled / heated ceiling & el heater
(cooling only: disable el heater
via P13)
Chilled ceiling and radiator
42 / 94
Siemens
Building Technologies
The diagrams below show the control sequence for 2-position control.
Heating mode with manual selection
(P01 = 2)
Y1
Y
1
w
0
½ SDH ½ SDH
Heating and cooling mode (P01 = 04)
Y Y1
x x
½ ½
dz dz
1
w
0
½ SDC
½ SDH ½ SDH
∂ The diagrams only show the PI thermostat's proportional part.
∂ For the fan sequence see section 3.8.
Refer to section 3.4, section 3.6.1, and section 3.7.
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:
* Not applicable for RDF301 and RDF301.50.
RDF301, RDF301.50..., RDF600KN, RDF600KN/S
Cooling mode with manual selection
(P01 = 2)
Y
1
T[°C]
0
½ SDC
T[°C] Room temperature
Y2
w
Y1
Y2
SDH Switching differential "Heating" (P30)
T[°C]
½ SDC
SDC Switching differential "Cooling" (P31)
X
dz
Set basic application
2-pipe
2-pipe and electric heater
4-pipe
Basic Documentation
Y2
w
T[°C]
½ SDC
Room temperature setpoint
Control command "Valve" or "Comp." (H)
Control command "Valve" or "Comp." (C)
Dead zone (P33)
See Sequences
section
H
3.6.3
C
El H + H (
3.6.4
El H + C (
C
H + C
3.6.5
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CE1P3171en
2017-12-07