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Siemens
RDF300… / RDF340... / RDF400… / RDF600… Basic Documentation
CE1P3076.en
Smart Infrastructure
2020-02-21
6.2.3
Water-based fan coil applications with RDF340...
Application:
2-pipe fan coil units
V1
M1
3-speed fan
N1
Room thermostat RDF340...
V1
Zone valve
S1, S2
Switch (keycard, window contact, etc.)
B1, B2
Temperature sensor
(return air temperature,
external room temperature,
changeover sensor, etc.)
Application:
2-pipe fan coil units
with electrical heater
V1
E1
YR
M1
3-speed fan
N1
Room thermostat RDF340...
V1
Zone valve
YR
0..10 signal converter/current valve
E1
Electrical heater
S1, S2 Switch (keycard, window contact, etc.)
B1, B2 Temperature sensor (return air temperature,
external room temperature,
changeover sensor, etc.)
Application:
4-pipe fan coil units
V1
V2
M1
3-speed fan
N1
Room thermostat RDF340...
V1
Zone valve “Heating”
V2
Zone valve “Cooling”
S1, S2 Switch (keycard, window contact, etc.)
B1, B2 Temperature sensor (return air temperature,
external room temperature,
changeover sensor, etc.)
Application:
4-pipe fan coil units
with single-speed fan
Note: Single-speed fan
also possible in other
applications!
V1
V2
M1
3-speed fan
N1
Room thermostat RDF340...
V1
Zone valve “Heating”
V2
Zone valve “Cooling”
S1, S2 Switch (keycard, window contact, etc.)
B1, B2 Temperature sensor (return air temperature,
external room temperature,
changeover sensor, etc.)
For US installations use Class 2 rated power supplies.
For other installations use circuit breakers with rated current of no more than 10 A.
Warning
