RDF30U Room Temperature Controller with LCD Technical Instructions
For Four-Pipe Fan Coil Units Document Number 155-335
September 27, 2007
Siemens Industry, Inc. Page 9
Specifications,
Continued
Environmental Conditions
Operation
Temperature 32°F to 122°F (0°C to 50°C)
Humidity <95% rh
Transport and storage
Temperature -13°F to 158°F (-25°C to 70°C)
Humidity <95% rh
Connection terminals Solid wires or prepared stranded
wires 2 × 16 AWG or 1 × 14 AWG
Weight 0.5 lb (0.23 kg)
Housing front color White, NCS S 0502-G (RAL 9003)
Figure 4. Wiring Terminals.
1, 2 24 Vac negative
3 24 Vac positive
4 Control valve output, 24 Vac
5 Control valve output, 24 Vac
(inverse of output 4)
6 Control output, second stage
heating or cooling (NO contact)
8 Measuring neutral, remote sensor
9 Return air temperature sensor
10 Control output, Fan speed III, 24 Vac
11 Control output, Fan speed II, 24 Vac
12 Control output, Fan speed I, 24 Vac
D1, Status input for potential-free
GND operating mode changeover switch
Figure 5. Four-Pipe Fan Coil Units.
B1 Return air temperature sensor
(QAH11.1)
M1 Three-speed fan
N1 Room temperature controller
RDF30U
S1 External operating mode
changeover switch
SN 24 Vac, negative
SP 24 Vac, positive
Y1 Zone valve for Heating mode
Y2 Zone valve for Cooling mode
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