User Manual
Table Of Contents
- 1. About this document
- 2. Summary
- 3. Functions
- 3.1 Temperature control
- 3.2 Operating modes
- 3.3 Room temperature setpoint
- 3.4 Applications overview
- 3.5 Additional functions
- 3.6 Control sequences
- 3.7 Control outputs
- 3.8 Fan control
- 3.9 Multifunctional input, digital input
- 3.10 Handling faults
- 3.11 Modbus RTU mode
- 3.12 Communication objects
- 3.13 Control parameters
- 4. Handling
- 5. Connection
- 6. Mechanical design
- 7. Technical data
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Siemens RDF302 Basic documentation CE1P3079en
Smart Infrastructure 2020-12-01
3.4.1 Applications for fan coil systems
*)
Application and output signal, DIP switches, diagram
· 2-pipe fan coil unit ON/OFF
(heating or cooling)
1
ON
2 3
· 2-pipe fan coil unit with electric
heater ON/OFF
(heating or cooling)
1
ON
2 3
3076D 20
(B1)
M1
V1
T
B2
T
T
(B1)
V1
M1
3171D21
T
B2
E1
T
(B1)
T
(B1)
· 2-pipe fan coil unit 3-position
(heating or cooling)
1
ON
2 3
· 4-pipe fan coil unit ON / OFF
(heating and cooling)
1
ON
2 3
3076D20
(B1)
M1
V1
T
B2
T
T
(B1)
T
V2
V1
M1
3076D22
(B1)
T
(B1)
V1 Heating or heating / cooling valve actuator B1 Return air temperature sensor or external room
temperature sensor (optional)
V2 Cooling valve actuator B2 Changeover sensor (optional)
E1 Electric heater M1 3- or 1-speed fan
*)
RDF302.B does not have inputs X1 and X2, so sensor B1 and B2 are not
included in RDF302.B application.