Page 1
e
s
2
205
7-day
Use
room temperature controller
Heating or cooling applications
· Mains-independent, battery-operated room temperature controller featuring
user-friendly operation, easy-to-read display and large numbers
· Self-learning two-position controller with PID response (patented)
· Operating mode selection:
- 7-day automatic mode with max. 3 heating or cooling phases
- Continuous comfort mode
- Continuous energy saving mode
- Protection against frost or overheating
- Exception day (24 hour operation) with max. 3 heating or cooling phases
· A separate temperature setpoint can be entered in automatic mode and for
the exception day for each heating or cooling phase
· Control of a heating zone
· Possibility to control cooling equipment
Room temperature control in:
· Single-family and vacation homes
· Apartments and offices
· Individual rooms and professional office facilities
· Commercially used spaces
REV24..
CE1N2205en
2019-07-17
Control for the following equipment:
· Magnetic valves of an instantaneous water heater
· Magnetic valves of an atmospheric gas burner
· Forced draught gas and oil burners
· Electrothermal actuators
· Circulating pumps in heating systems
· Electric direct heating
· Fans of electric storage heaters
· Zone valves (normally open and normally closed)
· Air conditioning and cooling equipment
Smart Infrastructur
Page 2
Functions
Type summary
· PID control with self-learning or selectable switching cycle time
· 2-point control
· 7-day time switch
· Remote control.
· Preselected 24-hour operating modes
· Override mode
· Holiday mode
· Party mode
· Protection function (protection against frost or overheating)
· Information level to check settings
· Reset function
· Sensor calibration
· Heating or cooling
· Minimum limitation of setpoint
· Periodic pump run
Protection against valve seizure
· Optimum start control in the morning (P.1)
· Synchronization to radio time signal from Frankfurt, Germany (REV24DC)
Ordering
Delivery
Mechanical design
Display and operating
elements
Room temperature controller with 7-day time switch REV24
Room temperature controller with 7-day time switch and
receiver for time signal from Frankfurt, Germany (DCF77) REV24DC
Please indicate the type number as per the "Type summary" when ordering.
The controller is supplied with batteries.
Plastic casing with an easy-to-read display and large numbers, easily accessible
operating elements, and removable base.
The housing contains the controller's electronics, DIP switches, and the relay with
potential-free changeover contact. The easily accessible battery compartment allows for
easy exchange of two 1.5 V alkaline batteries, type AA.
The base with terminal block provides lots of space to connect the wires.
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1
0 4 8 12 16 20 24
Display
Info
Without language selection
Change battery
Alarm
Heating mode
Cooling mode
Weekday (max. 3 spaces)
Info
Setpoint for remote control
Setpoint for comfort mode
Setpoint for absence
Room temperature
Setpoint for protection mode
Setpoint for energy saving
mode
h
°C / °F
Date (day - month - year)
Time of day
Room temperature (measured)
Clear text display line
(max. 18 spaces)
24 hour timeframe
Switching pattern with flashing
time cursor
Weekday block
Weekend block
Weekday
Time unit
Absence/holiday mode set
Absence/holiday mode active
Party mode active
Temperature unit °C or °F
Time signal from Frankfurt
2
3
Operating mode selector
Automatic weekly mode with max. three heating or cooling phases per
day.
Exception day with max. three heating or cooling phases.
Continuous comfort mode (= continuous comfort temperature).
Continuous energy saving mode (= continuous energy saving
temperature).
Protection mode (protection against frost or overheating).
INFO
Pressing the Info button once illuminates the display. Illumination
automatically turns off after a short period of time.
Pressing the Info button again activates the information display: is lit.
The unit first displays queued error messages followed by important
information (e.g. time switch programs, etc.).
Heating/cooling/pump on
Remote control active
Plus button
4
Increase values, set time, or make a selection.
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Override button / party mode
5
In the time switch program, this button allows you to quickly change from the
active temperature level to the next and back.
Thus, you can quickly change to energy saving temperature when you leave
the apartment for a short period of time, thus saving energy.
The display indicates the change. It is valid only until the next switching time.
Activate party mode: Press the button for 3 seconds.
Party mode is available only in operating modes and . In party mode,
the controller controls to a freely selectable temperature for a freely
selectable period of time.
In party mode, symbol is displayed along with the end of party mode.
Minus button
6
Decrease values, set time, or make a selection.
Program selection slider
7
Time
Day – Month – Year (2 spaces for day, month, and year)
Block of weekdays, block of weekend or individual days
1, 2, or 3 comfort phases.
Start
Comfort phase 1
Setpoint
Comfort phase 1
End
Comfort phase 1
Energy saving temperature in the automatic mode and exception day time
switch programs.
Start of absence / holiday
Temperature setpoint during absence / holiday
End of absence / holiday
Start
Comfort phase 2
Setpoint
Comfort phase 2
End
Comfort phase 2
Start
Comfort phase 3
Setpoint
Comfort phase 3
End
Comfort phase 3
Temperature setpoint at active remote control
RUN Slider position RUN allows for closing the cover
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Operating modes
Operation with
time switch program
Example with
3 heating phases
Continuous operating
modes
Setpoints
The controller offers the two time switch programs and .
Enter a start time and end time for each comfort phase. Also comfort temperature
setpoint can be freely entered for each comfort phase. Between the comfort phases
the controller always switches to the same, freely selectable energy saving
temperature setpoint.
The controller also offers the three 3 continuous modes comfort mode,
energy saving mode and frost protection mode.
You can freely adjust the setpoints for the weekly and 24-hour operating modes.
Setting range for all setpoints without setpoint limitation 3…35 °C.
Setting range for all setpoints with setpoint limitation 16…35 °C.
Factory setting
7-day time switch
, , ,
,
Factory setting for heating
20 °C 24 °C
16 °C 28 °C
Factory setting for cooling
8 °C 35 °C
,
Factory settings: Switching times
Comfort phases P1 P2 P3 P4 P5 P6
1. 07:00 23:00 PASS PASS PASS PASS
2. 06:00 08:00 17:00 22:00 PASS PASS
3. 06:00 08:00 11:00 13:00 17:00 22:00
12 °C 30 °C
Three different switching patterns are available to simplify entry of switching times. These
can be assigned as blocks to the corresponding weekdays 1…5 and weekend days
6…7. As a result, you need to adapt the switching times and room temperatures only
once for each block.
Switching pattern Blocks
You can also enter individual days … .
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Enter holidays or
absences
Remote control
You can enter the beginning, temperature and end of your holidays. At the beginning of
the holidays, the controller switches to the desired holiday temperature and returns to the
previously set operating mode at the end of the holidays.
In holiday mode, symbol is displayed along with the end of holiday mode.
Proceed as follows to enter your settings:
Set slider to position 15 (start of absence): Press or to set the start date
for your holidays.
Set slider to position 16 (temperature during absence): Press or to set
the desired temperature while on holidays.
Set slider to position 17 (end of absence): Press or to set the end date
for your holidays.
Return the slider to position RUN. Symbol is displayed to the left of the
RUN
symbol.
Press , , , or move the slider to end holiday mode prematurely.
Use a suitable remote control unit to activate the "Remote control" temperature
setpoint in the controller. Changeover takes place by making a potential-free contact
connected to terminals T1 and T2.
Enter temperature for
active remote control
A flashing symbol indicates active remote control mode.
After the contact opens, the previously set operating mode is reactivated.
Operation according to controller setting Temperature setpoint “remote control“
active
T1
T2
2252Z05
, , , , ,
T1
T2
2252Z06
Suitable remote control units are:
Telephone modem, manual switch, window contact, presence detector, central unit, etc.
You can freely select the temperature for active remote control. Activating remote control
immediately enables control to the remote control temperature regardless of the currently
active operating mode. When you deactivate remote control, the controller returns to the
set operating mode.
A flashing symbol indicates active remote control mode.
Proceed as follows to enter your settings:
Set slider to position 18 (temperature for active remote control): Press or
to set the desired temperature for active remote control.
Return the slider to positionRUN.
RUN
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Technical features
2211Z32
DIP switches
DIP switch
Sensor calibration On
A
Sensor calibration Off
ON / OFF 1 2 3 4 5 6 7 8 9 10
Periodic pump run and
anti-lime function On
Periodic pump run and
anti-lime function Off
Setpoint limitation 16…35 °C Start optimization: 1 h/°C
B
Setpoint limitation 3…35 °C Start optimization: ¼ h/°C
Temperature display °F Start optimization: ½ h/°C
C
Temperature display °C Start optimization: Off
PID self-learning
PID 6
D
(Op. mode: Cooling)
(Op. mode: Heating)
PID12 Quartz
2-point
ON
1 3 4
8 9
2
5 6 7
Radio clock
DIP switch reset
J
After you change one or several DIP switch positions, you must press the DIP switch reset button to reset the DIP
switch. Otherwise, the previous setting remains active!
Factory setting: All DIP switches to OFF
E
F
G
H
J
A Sensor calibration:
DIP switch 1
B Setpoint limitation:
DIP switch 2
C Temperature display in
°C or °F:
DIP switch 3
If the displayed room temperature does not match the measured room temperature, the
temperature sensor can be recalibrated.
Set DIP switch to ON and press the DIP switch reset button:
CAL symbol is displayed. The currently measured temperature flashes.
Press or to recalibrate by max.± 5 °C.
Set DIP switch to OFF and press the DIP switch reset button to save the settings.
The minimum setpoint limitation of 16 °C prevents undesired heat transfer to neighboring
spaces in buildings featuring several heating zones.
DIP switch ON: Setpoint limitation 16…35 °C.
DIP switch OFF: Setpoint limitation 3…35 °C (factory setting).
Press the DIP switch reset button to save the settings.
DIP switch ON: Temperature display in°F.
DIP switch OFF: Temperature display in °C (factory setting).
Press the DIP switch reset button to save the settings.
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D Control behavior:
DIP switches 4 and 5
The REV24… is a two-position controller with PID control. The room temperature is
controlled through cyclic switching of an actuating unit.
DIP switches 4 ON and 5 ON: PID self-learning
Adaptive control for all applications.
DIP switches 4 ON and 5 OFF: PID 6
Fast controlled system for applications in locations with
large temperature deviations.
DIP switches 4 OFF and 5 ON: PID 12
Normal controlled system for applications in locations with
normal temperature deviations.
DIP switches 4 OFF and 5 OFF: 2-point
For complex controlled systems, simple two-position controller with
0.5 °C switching difference (factory setting).
Press the DIP switch reset button to save the settings.
E Periodic pump run
and anti-lime function:
DIP switch 6
F Start optimization:
DIP switches 7 and 8
Only applicable with controlled circulating pump or valve!
This function protects the pump or valve during extended OFF periods against possible
seizure caused by liming. Periodic pump run is activated every 24 hours at 12 p.m. for
three minutes (symbol ▲ is displayed during active pump run).
DIP switch ON: Pump run ON.
DIP switch OFF: Pump run OFF (factory setting).
Press the DIP switch reset button to save the settings.
Optimization advances the switch-on point P.1 to ensure that the selected setpoint is
reached at the desired time. The setting depends on the controlled system, i.e., on heat
transmission (piping system, radiators), building dynamics (building mass, insulation),
and heat output (boiler capacity, flow temperature).
DIP switches 7 ON and 8 ON: 1 h/°C For slow controlled systems.
DIP switches 7 ON and 8 OFF: ¼ h/°C For fast controlled systems.
DIP switches 7 OFF and 8 ON: ½ h/°C For medium controlled systems.
DIP switches 7 OFF and 8 OFF: OFF Off, no effect (factory setting).
Press the DIP switch reset button to save the settings.
Key for Figure .:
T Temperature (°C)
t Forward shift of switch-on point (h)
TRx Room temperature actual value
Pon Starting point for optimized heat-up time
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G Operating mode heating
or cooling:
DIP switch 9
The controller can be switched over for cooling applications on DIP switch 9.
DIP switch 9 ON: Cooling
DIP switch 9 OFF: Heating (factory setting)
Press the DIP switch reset button to save the settings.
H Radio clock:
DIP switch 10
Note
on synchronization
Note
on reception
No reception
J DIP switch reset
ON
1 3 42
5 6 7 8 9
2211Z32
Only applicable to REV..DC (with integrated DCF77 receiver to receive time signal from
Frankfurt, Germany)!
DIP switch ON: Clock run by controller-internal quartz.
DIP switch OFF: Time signal DCF77 from Frankfurt, Germany.
Press the DIP switch reset button to save the settings.
During startup, REV..DC synchronizes automatically to the time signal (DCF77) from
Frankfurt, Germany. Synchronization takes max. 10 minutes. Synchronization restarts
each time you press the button or move the program selection slider from the RUN
position during these 10 minutes. Siemens recommends to set the desired settings upon
startup, install the REV..DC in the desired location, and not carry out any actions on the
REV..DC for the next 10 minutes.
In normal operation, the REV..DC synchronizes to the radio clock every day at 3:10 a.m.
The time signal from Frankfurt is modulated to a radio signal. The reception of this radio
signal depends on the distance to Frankfurt, atmospheric conditions as well as the
location where the REV..DC is installed. Siemens cannot guarantee that the REV..DC
can receive the time signal from Frankfurt at any time and any place.
The radio clock symbol is deactivated and an error message is displayed if the clock was not
able to synchronize the time for 7 consecutive days. The controller then runs on the internal
quartz.
After you change one or several DIP switch positions, you must press the DIP switch
reset button to reset the DIP switch.
Else, the previous setting remains active!
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Access to the expert level
Set the program selection slider to RUN. Press and simultaneously for 3 seconds, release the buttons, and
within 3 seconds press and hold down and simultaneously for 3 seconds, release , and press for another 3
seconds. This releases the settings at the expert level. is displayed.
The display first shows language selection with Code 00. Press the buttons or to navigate the settings.
Confirm settings by pressing .
Press the operating mode selector to exit the engineering settings.
Code list
Function block Code Name Factory setting Your setting
00 Language English
Basic settings
LCD
optimization
01 Sensor calibration off
02
Switching differential 2-point
0.5 °C
10 Illumination time 10 seconds
11 Background brightness 0
12 Contrast 0
Time zone
30
Clock settings
31
Deviation from time signal in Frankfurt
0 hours
(Central European Time CET) (see Note 1)
Start of daylight saving time (see Note 2) March 31 (03-31)
32 End of daylight saving time (see Note 3) October 31 (10-31)
Note 1:
Note 2:
Note 3:
Functional check
This entry has no effect if the radio clock either is inactive or not available.
The time signal received from Frankfurt is shifted by the value set in Code 30 (time zone)
if the radio clock is active.
The time is always changed over at 2 a.m. on the Sunday preceding the set date if there
is no radio clock or if it is inactive. The time change is shifted by the value set in Code 30
(time zone) when the radio clock is active.
The time is always changed over at 3 a.m. on the Sunday preceding the set date if there
is no radio clock or if it is inactive.
a) Check the display. If there is no display, check insertion and function of the batteries.
b) Operating mode “Continuous comfort mode“ , read displayed temperature.
c) REV.. in heating mode: Set the temperature setpoint higher than the displayed room
temperature (see operating instructions).
REV.. in cooling mode: Set the temperature setpoint lower than the displayed room
temperature (see operating instructions)
d) The relay and, as a result, the actuating device must switch at the latest after one minute.
Symbol ▲ is displayed. If not displayed:
· Check actuating device and wiring
· It is possible that in heating mode the room temperature is higher than the set
temperature setpoint (and lower for cooling mode)
e) Set the temperature setpoint for operating mode “Continuous comfort mode“ to the
desired value
f) Select the desired operating mode
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Reset
2211Z32
Engineering
User-defined settings:
Press , and simultaneously for 3 seconds:
This resets all temperature and time settings of the program selection slider to default
values (see also "Factory settings" in the operating instructions). The expert settings
remain unchanged.
The clock starts at 12 p.m., the date on 01-01-08 (01 January 2008).
During the reset, all display fields are lit and can be checked accordingly.
All user-defined settings plus expert settings:
ON
3 4
1
2
5 6
7
8 9
Press the DIP switch reset button
, and simultaneously for 5
seconds:
After the reset, all factor settings are reloaded. This applies to the program selection
slider as well as to the expert settings.
· Mount the room temperature controller in the main living room
· Select the mounting place so that the sensor can acquire the air temperature in the
room as accurately as possible and without being influenced by solar radiation or
other heat or refrigeration sources
· Mounting height is approx. 1.5 m above the floor
· You can mount the unit on most commercially available recessed conduit boxes or
directly on the wall
Mounting and
installation
· Begin installation by first attaching and wiring the base. You can mount the base on
most commercially available recessed conduit boxes or directly on the wall. Then
insert the controller from top to bottom into the base.
For more information, see the installation instructions supplied with the unit.
· Comply with all local regulations on electrical installation
· Wire separately the remote control contact T1 / T2 using a separate, shielded cable
Warning!
No internal line protection for supply lines to external consumers.
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 power supply line must have an external circuit breaker with a rated current of no
more than 10 A.
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●
Do not heat the batteries to more than 85
°
C.
water. Consult a doctor.
Commissioning
· Remove from the batteries the battery transit tab designed to prevent premature
activation of the unit: Select desired language by or . Confirm by .
· You can change the control characteristics using the DIP switch on the rear of the unit
· Set any thermostatic radiator valves to their fully open position, if present in the
reference room
· Recalibrate the temperature sensor (see "Sensor calibration") if the displayed room
temperature does not match the room temperature measured
Notes
Disposal
This is a software class A controller designed for use at a normal degree of pollution.
The device is considered electrical and electronic equipment for disposal in terms of
the applicable European Directive 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.
· Dispose of empty batteries in designated collection points.
WARNING
Risk of explosion due to fire or short-circuit, even if the batteries are empty
Risk of injuries from by flying parts
● Do not allow the batteries to come into contact with water.
● Do not charge the batteries.
● Do not damage or destroy the batteries.
WARNING
Electrolyte leakage
Chemical burns
● Only grasp damaged batteries using suitable protective gloves.
● If electrolyte comes into contact with eyes, immediately rinse eyes with plenty of
Observe the following:
· Only replace batteries with batteries of the same type and from the same manufacturer.
· Observe the polarities (+/-).
· The batteries must be new and free from damage.
· Do not mixed new batteries with used batteries.
· Store, transport, and dispose of the batteries in accordance with local regulations, guidelines, and laws. Also
observe information from the battery manufacturer.
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Technical data
General unit data
Standards
Eco design and labelling
directives
Product safety
Environmental conditions
Weight
Color
Size
Supply
Batteries (alkaline AA)
Life
Backup of clock when changing battery
DC 3 V
2 x 1.5 V
Approx. 2 years
Max. 1 min
(all other data remain in EEPROM)
Switching capacity of relay
Voltage
Current
AC 24…250 V
0.1…6 (2.5) A
No internal fuse
External preliminary protection with max. C 10 A circuit breaker in the supply line
required under all circumstances.
Protection class II as per EN 60730-1
Sensing element
Measuring range
Time constant
NTC 10 kW ±1 % at 25 °C
0…50 °C
Max. 10 min
Setpoint setting ranges
All temperature settings
3…35 °C
Resolution for settings and displays
Setpoints
Switching times
Actual value measurement
Actual value display
Time display
EU Conformity (CE)
RCM conformity
0.2 °C
10 min
0.1 °C
0.2 °C
1 min
REV24 & REV24-XA: CE1T2205X1
REV24DC: CE1T2205X2
*)
REV24 & REV24-XA: A6V11180843
REV24DC: A6V11399495
*)
*)
*)
Based on EU Regulation 813/2013 (Eco design directive) and 811/2013 (Labelling
directive) concerning space heaters, combination heaters, the following classes apply:
- Application with On/Off operation
Class I value 1%
of a heater
- PWM (TPI) room thermostat, for
Class IV value 2%
use with On/Off output heaters
Degree of protection IP20
Operation
Climatic conditions
Temperature
Humidity
3K3 as per IEC 60721-3-3
5...40 °C
<85 % r.h.
Storage and transport
Climatic conditions
Temperature
Humidity
Mechanical conditions
2K3 as per IEC 60721-3-2
-25...70 °C
<93 % r.h.
2M2 as per IEC 60721-3-2
Excl. packaging 0.29 kg
Housing RAL9003 signal white
Base RAL7038 gray
Housing with base 90 x 134.5 x 30 mm
*) The documents can be downloaded from http://siemens.com/bt/download.
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Connection diagrams
L
L1
Y1M1N1
NS1T1T2L2
D
C
3
V
10 A
L
N
2
0
A
2
5
2
2
V
0
5
2
.
.
.
4
2
C
A
REV24 / REV24DC
L Phase, AC 24 … 250 V S1 Remote control unit (potential-free)
L1 N.O. contact,
T1 Remote control signal
AC 24 …250 V / 6 (2.5) A
L2 N.C. contact,
T2 Remote control signal
AC 24 … 250 V / 6 (2.5) A
M1 Circulating pump Y1 Actuating device
N1 REV24… controller
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Application examples
2252S02
2252S03
2252S05
T
N1
T
T
F1
T
F2
N1
F2
T T
F1
Y2
M1
2252S01
Y2
Instantaneous water heater Atmospheric gas burner
N1
T T
Y3
N1
Y4
E1
Zone valve Cooling unit
T
N1
Y1
M1
T
N1
M1
2252S04
Circulating pump with precontrol by manual mixing valve
E1 Cooling unit Y1 3-port valve with manual adjustment
F1 Thermal reset limit thermostat Y2 Magnetic valve
F2 Manual reset safety limit thermostat Y3 Three-port valve with actuator
M1 Circulating pump Y4 Two-port valve with actuator
N1 REV24.. room temperature controller
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www.siemens.com/buildingtechnologies
Dimensions
Issued by
Siemens Switzerland Ltd.
Smart Infrastructure
Global Headquarters
Theilerstrasse 1a
CH-6300 Zug
Tel. +41 58 724 2424
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Technical specifications and availability subject to change without notice.
© Siemens Switzerland Ltd, 2008 - 2019
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