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
Agency Approvals
UL Listing
UL 873
General
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)
Wiring Terminals
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
Wiring Diagrams
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
