RDF20U Room Temperature Controller with LCD
Technical Instructions
For Two-Pipe Fan Coil Units with Electric Heat
Document Number 155-334
September 27, 2007
Siemens Industry, Inc.
Page 7
Table 1. Control Parameters.
Para-
meter
Description
Setting Range
Factory
Setting
P01
Heating setpoint in Economy mode
(operating mode changeover contact activated )
OFF,
41
F to 68
F (5
C to 20
C) (in increments of 0.5 K)
61
F
(16
C)
P02
Cooling setpoint in Economy mode
(operating mode changeover contact activated )
OFF,
70
F to 95
F (21
C to 35
C) (in increments of 0.5 K)
82
F
(28
C)
P03
Heating setpoint in Standby
OFF,
41
F to 68
F (5
C to 20
C) (in increments of 0.5 K)
46
F (8
C)
P04
Cooling setpoint in Standby
OFF,
70
F to 95
F (21
C to 35
C) (in increments of 0.5 K)
OFF
P05
Minimum setpoint limit stops in Normal mode
41
F to 68
F (5
C to 20
C) (in increments of 0.5 K)
41
F (5°C)
P06
Maximum setpoint limit stops in Normal mode
70
F to 95
F (21
C to 35
C) (in increments of 0.5 K)
95
F
(35°C)
P07
Heating/cooling changeover cooling switching
point
50
F to 77
F (10
°C
to 25
°
C) (in increments of 0.5 K)
61
F
(16
C)
P08
Heating/cooling changeover heating switching
point
8
°
F to 104
°
F (27
°
C to 40
°
C
)
(in increments of
0.5 K)
82
F
(28
C)
P09
Sensor calibration
-3K to 3 K (-5.4
°
F to 5.4
°
F) (in increments of 0.5 K)
0 K (0
F)
P10
P-band in Heating mode or switching differential
heating.
NOTE:
This parameter is in degrees
Kelvin, 1 K = 1.8
F.
0.5 K to 4 K (1
°
F to 7
°
F) (in increments of 0.5 K)
2 K
(3.6
°F)
P11
P-band in Cooling mode or switching differential
cooling.
NOTE:
This parameter is in degrees
Kelvin, 1 K = 1.8
F.
0.5 K to 4 K (1
°
F to 7
°
F) (in increments of 0.5 K)
1 K
(1.8
°F)
P12
Dead zone in Normal mode
0.5 K to 10 K (1
°
F to 18
°
F) (in increments of 0.5 K)
2 K
(3.6
°F)
P13
Active temperature sensor (no setting, display
only)
1: Room temperature sensor active
2: Return air temperature sensor active
--
P14
Value of current room temperature reading
(no setting, display only)
32
°
F to 120
°
F (0
°
C to 49
°
C) = current temperature
value
--
P15
Value of current heating/cooling changeover
temperature reading including indication of
current mode (
, ) (no setting, display only)
100 = input open (no sensor connected, heating
mode (
)
32
°
F to 120
°
F (0
°
C to 49
°
C) = current temperature
value
00 = input bridged, Cooling mode (
)
--
P16
Purging function
0 min.: Not active
1 to 5 min.: Active with selected duration
0 min.
P17
Fan control in Economy mode
OFF: Fan is off in the dead zone
ON: Fan is on in the dead zone,
ON: Running at the selected speed or at speed 1 if
in Standby
OFF
P18
Setpoint differential
0.5 K to 5 K (1
°
F to 9
°
F)
2 K
(3.6
°F)
P19
Minimum output on time (4, 6)
1 to 20 minutes (in increments of 1 min.)
1 min.
P20
Minimum output off time (4, 6)
1 to 20 minutes (in increments of 1 min.)
1 min.
P21
Fan overrun
0 to 300 seconds (in increments of 10 seconds)
60 s
P22
Point of reference for setpoint in Normal mode
HA: Heating sequence; CL: Cooling sequence
HA
P23
Display unit of measure
°
F,
°
C
°
F
