Technical Instructions
RDF30U Room Temperature Controller with LCD
Document Number 155-335
for Four-Pipe Fan Coil Units
September 27, 2007
Page 8
Siemens Industry, Inc.
Mounting,
Installation and
Commissioning
Notes, Continued
▪
Prior to installing the changeover sensor, thermal conductive paste must be applied
to the location on the pipe where the sensor is placed.
▪
Installation Instructions are included with the controller.
WARNING:
•
Sensor inputs 7, 8, and 9
carry live voltage potential. If the sensor’s
cables must be extended, the cables used must be suited for live
voltage.
•
The cables used must meet the insulation requirements for live
voltage.
Calibrating the Sensor
If the room temperature displayed by the controller is inconsistent with the room
temperature being measured, the temperature sensor of the RDF30U can be
recalibrated. To recalibrate, change Parameter P09.
Specifications
Power Supply
Operating voltage
24 Vac, +20/-25%
Frequency
50/60 Hz
Power consumption
6 VA maximum
Fan control outputs 12, 11, 10
24 Vac
Rating
5 (3) A maximum
Valve control output 4, 6 (NO)
24 Vac
55 (3) A maximum
Return air temperature sensor
QAH11.1 safety class II
status input 9-8
NTC resistor 3 k
at 77°F (25°C)
Status input D1 and GND
Contact sensing
SELV 6 to 15 Vdc/3 to 6 mA
Insulation against live voltage
4 kV, reinforced insulation
Operating action
Selectable
Permissible cable length with copper
262 ft (80 m)
cable 14 AWG for connection to terminals
7, 8, 9 and D1, GND
Operational Data
Setpoint setting range
41°F to 95°F (5°C to 35°C)
Control deviation at 77°F (25°C)
+ 0.5 K (1°F) maximum
Switching differential in Heating mode,
2 K (3.6°F)
adjustable
Switching differential in Cooling mode,
1 K (1.8°F)
adjustable
Dead zone X
dz
in Normal mode (adjustable)
2 K (3.6°F)
Setpoint, Economy mode , heating,
61°F (16°C)
adjustable
Setpoint, Economy mode , cooling,
82°F (28°C)
adjustable
Setpoint, Standby
, heating, adjustable
46°F (8°C)
Setpoint, Standby
, cooling, adjustable
OFF
