Siemens RCC30 User manual

CE1N3023en
2017-11-14
Building Technologies
3
023
Room Temperature Controller RCC30
for four-pipe fan coil units
Outputs for on / off valve actuators
Outputs for three-speed fan
Control depending on room or return air temperature
Operating modes: normal, energy saving and frost protection or OFF
Operating mode changeover input for remote control
Selectable control parameters
Operating voltage AC 230 V
Use
Typical use:
∂Control of the room temperature in individual rooms that are heated or cooled with
four-pipe fan coil units.
∂For opening or closing a valve
∂for switching a three-speed fan.
Functions
The controller acquires the room temperature with its integrated sensor or external
room temperature sensor (QAA32) or external return air temperature sensor (QAH11.1)
- if used - and maintains the setpoint by delivering control commands to the 2-point-
valve.
The switching differential is adjustable. It can be 1 or 4 K in heating mode and
0.5 or 2 K in cooling mode.

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The fan is switched to the selected speed via control output Q1, Q2 or Q3.
When the function “Temperature-dependent fan control“ is activated (can be selected
with DIP switch no.1), the fan is switched on / off depending on the temperature, that is,
together with the valve.
It is switched off by
∂leaving the heating or cooling sequence, provided the function “Temperature-
dependent fan control “ is activated, or
∂manually changing to standby , provided plant conditions do not call for frost
protection mode, or
∂activating an external operating mode changeover switch, provided plant conditions
do not call for energy saving or frost protection mode, or
∂turning the controller’s power supply off.
The heating valve receives the OPEN command via control output Y11 when
1. the measured room temperature lies by half the switching differential below the
setpoint, and
2. the heating valve has been fully closed for more than one minute.
The heating valve receives the CLOSE command via control output Y11 when
1. the measured room temperature lies by half the switching differential above the
setpoint, and
2. the heating valve has been fully open for more than one minute.
The cooling valve receives the OPEN command via control output Y21 when
1. the measured room temperature lies by half the switching differential plus the dead
zone above the setpoint (x ″w + xdz + ½ SDC) and
2. the cooling valve has been closed for more than one minute.
The cooling valve receives the CLOSE command via control output Y21 when
1. the measured room temperature lies by half the switching differential plus the dead
zone below the setpoint (x > w + xdz - ½ SDC) and
2. the cooling valve has been open for more than one minute.
Heating / cooling mode
Y11
Xdz
? SDH ? SDH
? SDC ? SDC
w
Y21
0
1
1
3023D01
T[ 癈 ]
The RCC30 provides control either depending on the measured room temperature or
depending on the fan coil unit’s return air temperature. Changeover is automatic if a
QAH11.1 cable temperature sensor is connected to the device.
Fan operation
Heating mode
ON
OFF
Cooling mode
ON
OFF
Return air tempera-
ture
TRoom temperature
SDH Switching differential "Heating"
SDC Switching differential "Cooling"
Xdz Dead zone
wRoom temperature setpoint
Y11 Manipulated variable "Heating valve"
Y21 Manipulated variable "Cooling valve"

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The room temperature setpoint can be limited in increments of 1 K by making use of
the minimum and maximum limitation facility. Arbitrary setpoint readjustments can thus
be prevented.
Operating modes
The following operating modes are available:
Heating or cooling mode with automatic changeover and with manually selected fan
speed III, II or I. In normal operation, the controller maintains the adjusted setpoint in
heating mode and, in cooling mode, a temperature level represented by the setpoint
plus the dead zone.
The frost protection function is activated only when DIP switch no.4 is set to OFF.
Frost protection mode can be activated either
∂by manually switching to standby
∂by activating the external operating mode changeover switch, provided DIP switch
no.2 is set to OFF
If the room temperature falls below 8 °C, the controller will automatically switch to frost
protection mode. In that case, the heating valve opens and the fan operates at the se-
lected speed. If the operating mode selector is in position standby , the fan will oper-
ate at speed I. The room temperature is maintained at a setpoint of 8 °C and the set-
point adjusted by the user will be ignored.
If frost protection mode is locked (DIP switch no.4 in position ON), standby is locked
also, which means that the controller will not switch to standby but to OFF.
In energy saving mode, the setpoint of heating is 16 °C and the setpoint of cooling
28 °C, independent of the position of the setpoint knob. This operating mode will be
activated when input D1 for operating mode changeover is active and DIP switch no.2
is set to ON.
A changeover switch can be connected to status input D1-GND. When the switch
closes its contact (caused by an open window, for instance), the operating mode will
change from normal operation to energy saving mode (provided DIP switch no.2 is set
to ON), or from normal operation to standby (provided DIP switch no.2 is set to OFF). If
the room temperature falls below 8 °C and if DIP switch no.4 is set to OFF, frost protec-
tion mode will become active.
The operating action of the switch (N.C. or N.O.) can be selected.
Ordering
When ordering, please give name and type reference.
The QAH11.1 temperature sensor (used as a return air temperature sensor) and zone
valves are to be ordered as separate items.
Equipment combinations
Type of unit Type reference Data sheet*)
Temperature sensor QAH11.1 1840
Room sensor QAA32 1747
Motoric on/off actuator SFA21... 4863
Thermal actuator (for radiator valve) STA21... 4893
Thermal actuator (for small valve 2,5 mm) STP21... 4878
*) The documents can be downloaded from http://siemens.com/bt/download.
Energy saver
Normal operation
Frost protection mode
Energy saving mode
Operating mode
changeover switch

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Mechanical design
The unit consists of two parts:
∂A plastic housing which accommodates the electronics, the operating elements and
the built-in room temperature sensor
∂A mounting base
The housing engages in the mounting base and snaps on.
The base carries the screw terminals.
The DIP switches are located at the rear of the housing.
3021Z01
2 5 6 13 4
1. Operating mode selector
(standby , heating or cooling mode with manual selection of fan speed)
2. LEDs for indicating heating mode, cooling mode and fan operation
3. Setting facility for minimum setpoint limitation
(in increments of 1 K)
4. Setting facility for maximum setpoint limitation
(in increments of 1 K)
5. Room temperature setpoint knob
6. Set of DIP switches
DIP switch no. Meaning Position ON Position OFF
1Fan control Fan control is temperature-
dependent in all operating
modes
Fan control in normal operation is tem-
perature- independent1)
2Operating mode change-
over via external switch
Changeover between normal
operation and energy saving
mode
Changeover between normal operation
and standby 1)
3Operating action of switch
for external operating
mode changeover
Changeover activated when
contact of switch is closed
(N.O.)1)
Changeover activated when contact of
switch is open
(N.C.)
4Standby Frost protection function not
enabled
Frost protection function enabled 1)
5Switching differential 1 K in heating mode 1)
0.5 K in cooling mode 1)
4 K in heating mode
2 K in cooling mode
6Dead zone in
normal operation
2 K 1) 5 K
1) Factory setting
Setting and operating
elements
Legend

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Accessories
Description Type reference
Adapter plate 120 x 120 mm for 4“ x 4“ conduit boxes ARG70
Adapter plate 96 x 120 mm for 2“ x 4“ conduit boxes ARG70.1
Adapter plate for surface wiring 112x130 mm ARG70.2
Engineering notes
Mounting location: on the wall or inside the fan coil unit. Not in niches or bookshelves,
not behind curtains, above or near heat sources and not exposed to direct solar radia-
tion. Mounting height is about 1.5 m above the floor. The connecting wires can be run
to the controller from a recessed conduit box.
Check the settings of the DIP switches no.1 through no.6 and change them if required.
If setpoint limitation is required, use the minimum and maximum limitation facility (en-
ergy saver).
After applying power, the controller makes a reset during which the fan LED flashes,
indicating that the reset has been correctly made. This takes about 3 seconds. Then,
the controller will be ready to operate and the LED stops flashing,
∂The cables used must satisfy the insulation requirements with regard to
mains potential.
∂Sensor input B1-M carries mains potential. If the sensor’s cables must be extended,
the cables used must be suited for mains voltage
Warning!
No internal line protection for supply lines to external consumers
(Q1, Q2, Q3, Y11, Y12)
Risk of fire and injury due to short-circuits!
∂Adapt the line diameters as per local regulations to the rated value of the installed
overcurrent protection device.
The controller is supplied with Mounting Instructions.
Disposal
The device is considered an electronic device for disposal in terms of the Euro-
pean Directive 2012/19/EU and may not be disposed of as domestic garbage.
∂Dispose of the device through channels provided for this purpose.
∂Comply with all local and currently applicable laws and regulations.
Mounting, installation
and commissioning
notes

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Technical data
Operating voltage
AC 230 V
+10/-15 %
Frequency 50/60 Hz
Power consumption max. 6 VA
No internal fuse
External preliminary protection with max. C 10 A circuit breaker in the supply line re-
quired under all circumstances
Control outputs Q1, Q2, Q3
Rating
AC 230 V
max. 600 VA
Control output Y11, Y21 (N.O. contacts)
Rating
AC 230 V
max. 300 VA
Signal input B1 for return air sensor QAH11.1, Safety class II
NTC resistor 3kΩat 25°C
Status input D1 and GND
Contact sensing
Insulation against mains
SELV DC 6-15 V / 3-6 mA
4 kV
Perm. cable length with copper cable 1.5 mm2
for connection to terminals B1, B2 and D1 80 m
Setpoint setting range 8...30 °C
Max. control deviation at 25 °C max. °0.7 K
Switching differential in heating mode SDH
(selectable)
1 K or 4 K
Switching differential in cooling mode SDC
(selectable)
0.5 K or 2 K
Dead zone in normal operation 2 K or 5 K
Setpoint «Energy saving mode », heating 16 °C
Setpoint « Energy saving mode », cooling 28 °C
Setpoint «Standby » 8 °C
Operation
Climatic conditions
Temperature
Humidity
to IEC 60721-3-3
class 3K5
0...+50 °C
<95 % r.h.
Transport
Climatic conditions
Temperature
Humidity
Mechanical conditions
to IEC 60721-3-2
class 2K3
,25...+70 °C
<95 % r.h.
class 2M2
Storage
Climatic conditions
Temperature
Humidity
to IEC 60721-3-1
class 1K3
,25...+70 °C
<95 % r.h.
EU Conformity (CE) CE1T3020xx *)
RCM Conformity CE1T3020en_C1 *)
Safety class II to EN 60 730-1
Pollution class normal
Degree of protection of housing IP30 to EN 60 529
The product environmental declaration CE1E3020*) contains data on envi-
ronmentally compatible product design and assessments (RoHS compli-
ance, materials composition, packaging, environmental benefit, disposal).
*) The documents can be downloaded from http://siemens.com/bt/download.
Power supply
Operational data
Environmental
conditions
Norms and standards
Environmental
compatibility

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Connection terminals Use solid wires or prepared
stranded wires.
2 x 0.4-1.5 mm2or 1 x 2.5 mm2
Weight 0.23 kg
Colour of housing front White, NCS S 0502-G (RAL9003)
Connection terminals
3023G01
LB1M D1 GND
N Q1 Q2 Q3 Y11 N Y21
SELV
L, N Operating voltage AC 230 V
B1 Status input “Return air temperature sensor“
MMeasuring neutral “Return air temperature
sensor“
D1, GND Status input for potential-free operating mode
changeover switch
(operating action can be selected)
Q1 Control output “Fan speed I“, AC 230 V
Q2 Control output “Fan speed II'“, AC 230 V
Q3 Control output “Fan speed III'“, AC 230 V
Y11 Control output '“Valve“, AC 230 V
Y21 Control output “Valve“, AC 230 V
Connection diagram
B1 Return air temperature sensor (QAH11.1)
M1 Three-speed fan
N1 RCC30 room temperature controller
S1 External operating mode changeover switch
Y1 Zone valve MVE.../ MXE... for heating mode
Y2 Zone valve MVE.../ MXE... for cooling mode
General

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Siemens Room temperature controller CE1N3023en
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Issued by
Siemens Switzerland Ltd.
Building Technologies Division
International Headquarters
Gubelstrasse 22
CH-6300 Zug
Tel. [phone]
© Siemens Switzerland Ltd, 2002 - 2017
Technical specifications and availability subject to change without notice.
www.siemens.com/buildingtechnologies
Dimensions
96,6
114,15
42,8
3021M01
90
4
4
3021M02
28 28
2828
26 30
3530
11,8
104
4
unit
baseplate