Siemens REA22 Operator's manual

CE1P2276E
31.03.1999 Siemens Building Technologies
Landis & Staefa Division
REA22
Room Temperature Controller
Basic Documentation
Issue: 2.0
Controller series: A

1998 Siemens Building Technologies Ltd.
Siemens Building Technologies Ltd.
Landis & Staefa Division
Gubelstrasse 22
CH-6301 Zug
Tel. 041 - 724 11 24
Fax. 041 - 724 35 22
http://www.landisstaefa.com

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Contents
1 Summary.........................................................................................................5
1.1 Brief description..........................................................................................5
1.2 Features .....................................................................................................5
1.3 Field of use.................................................................................................6
1.3.1 Target market........................................................................................6
1.3.2 Types of buildings .................................................................................6
1.3.3 Types of systems ..................................................................................6
1.3.4 Controllable equipment .........................................................................6
1.4 Product liability ...........................................................................................7
2 Handling .........................................................................................................8
2.1 Engineering ................................................................................................8
2.2 Mounting.....................................................................................................9
2.3 Electrical installations ...............................................................................10
2.3.1 Regulations for installation ..................................................................10
2.3.2 Connection diagram............................................................................10
2.4 Display and operating elements ...............................................................11
2.5 Startup......................................................................................................12
2.5.1 First startup.........................................................................................12
2.6 Short-term individual settings ...................................................................13
2.6.1 Short-term increase/decrease of actual room temperature.................13
2.6.2 Short-term change of temperature level..............................................13
3 Description of end-user settings................................................................14
3.1 Set the time of day or weekday ................................................................14
3.2 Select operating modes............................................................................14
3.3 Enter individual temperatures and heating periods...................................15
3.3.1 7-day time switch.................................................................................15
3.3.2 Check settings of the 7-day time switch..............................................16
3.3.3 24-hour mode with one heating period................................................16
3.3.4 24-hour mode with two heating periods...............................................17
3.3.5 24-hour mode with three heating periods............................................17
3.3.6 Continuous normal temperature..........................................................18
3.3.7 Continuous economy temperature ......................................................18
3.3.8 Continuous standby with frost protection.............................................18
3.4 Holiday program .......................................................................................19
3.5 Reset to standard values..........................................................................20

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3.6 Battery change......................................................................................... 20
4 Description of heating engineer settings.................................................. 21
4.1 DIP switch 1............................................................................................. 21
4.1.1 Optimum start control ......................................................................... 21
4.2 DIP switch 2............................................................................................. 22
4.2.1 Limitation of setpoint........................................................................... 22
4.2.2 Cooling function.................................................................................. 22
4.2.3 Periodic pump run (pump kick)........................................................... 22
4.3 DIP switch 3............................................................................................. 23
4.3.1 Control................................................................................................ 23
4.3.2 Frost protection................................................................................... 23
4.4 Functional check...................................................................................... 24
4.5 Calibration of sensor................................................................................ 24
5 Applications................................................................................................. 25
5.1 Instantaneous water heater...................................................................... 25
5.2 Atmospheric gas burner........................................................................... 25
5.3 Zone valve ............................................................................................... 25
5.4 Circulating pump with pre-control through manual mixing valve .............. 26
5.5 Refrigeration unit...................................................................................... 26
6 Dimensions.................................................................................................. 27
7 Technical data ............................................................................................. 28
8 Index............................................................................................................. 29

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1 Summary
1.1 Brief description
•Mains-independent room temperature controller featuring straightforward operation
and an easy-to-read display
•Self-learning two-position controller providing PID control (patented)
•Choice of three different 24-hour operating modes and one 7-day mode including in-
dividually adjustable 24-hour modes
•Control of cooling equipment
1.2 Features
•PID control
•Self-learning or adjustable switching cycle time
•7-day time switch
•Pre-selected 24-hour operating modes
•Override button
•Reset function
•Sensor calibration
•Setting check
•Holiday mode (1…99 days)
•Cooling function
•Frost protection function
•Minimum limitation of setpoint
•Pump kick
•Optimum start control in the morning (P.1)

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1.3 Field of use
1.3.1 Target market
•OEM
•Manufacturers of boiler and heating units
1.3.2 Types of buildings
Room temperature control in:
•Single-family and holiday houses
•Apartments and office spaces
•Individual rooms and consulting rooms
•Commercially used spaces
1.3.3 Types of systems
Standard heating systems, such as:
•Radiator heaters
•Convector heaters
•Underfloor heating systems
•Ceiling heating systems
•Radiant panels
•Cooling systems
1.3.4 Controllable equipment
•
Solenoid valves of instantaneous water heaters
•Solenoid valves of atmospheric gas burners
•Forced draught gas and oil burners
•Electrothermal actuators
•Circulating pumps in heating systems
•Electric direct heating
•Fans of electric storage heaters
•Zone valves (normally closed)
•Cooling and refrigeration equipment

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1.4 Product liability
•The products may only be used in building service plants and applications as indi-
cated before
•When using the products, all requirements specified under "Technical data" must be
observed
•Local regulations for electrical installations must be complied with

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2 Handling
2.1 Engineering
•The room temperature controller should be fitted in the main living room
•The place of installation should be chosen so that the sensor can capture the room
temperature as accurately as possible, without being affected by direct solar radia-
tion or other heating or cooling sources
•Mounting height is approx. 1.5 m above the floor
•The unit can be fitted to most commercially available recessed conduit boxes or di-
rectly on the wall

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2.2 Mounting
Description Illustration
Open screw on the controller
without opening the cover.
2276Z21
Lift controller from base.
2276Z22
Mount base directly on the
wall or onto a recessed con-
duit box.
2276Z23
Connect wires to base. For
correct wiring, refer to con-
nection diagram in this
chapter.
2276Z24

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Description Illustration
Mount controller onto the
base again.
2276Z25
Tighten screw. The controller
is ready for operation.
2276Z26
2.3 Electrical installations
2.3.1 Regulations for installation
When installing the room temperature controller, the base must first be fitted and wired.
Then, the unit is engaged at the top, swung downward and secured with a screw.
For the electrical installation, the local safety regulations and standards must be com-
plied with.
2.3.2 Connection diagram
L
L1
Y1 M1
N1
AC 24...250 V
2276A01
N
L2
L Live, AC 24…250 V
L1 N.O. contact,
AC 24…250 V /
0.1…6 (2.5) A
L2 N.C. contact,
AC 24…250 V /
0.1…6 (2.5) A
M1 Circulating pump
N1 REA22 controller
Y1 Regulating unit

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2.4 Display and operating elements
Auto
Run
°C
T3
Day/
Day
T1 T2 T3 T1 T2 T3
P.1 P.2 P.3 P.4 P.5 P.6 Auto 1...7
1
6
1
-
-
...
5
7
7
1
6
1
-
-
...
5
7
7
1.5V 'AA'
1.5V 'AA'
1234567
06121824
COOLING
2276Z07
2
1
7
6
5
4
3
1Display
Standby with frost protection
Normal temperature
Economy temperature
1 7
. . . Block/day
Switching pattern with
flashing time cursor
Heating/cooling on
COOLING Cooling mode
Holiday mode
Battery change
Time of day
1Weekday
Room temperature (meas-
ured)
Active normal temperature
2Battery compartment
1.5V ' AA'
1.5V ' AA' Two alkaline batteries 1.5 V
(AA)
3Setting slider
Day/ Time/weekday
1
6
1
-
-
...
5
7
7Switching pattern allocation
block/day
T1 T2 T3
P.1 P.2 P.3 P.4 P.5 P. 6 Switching times P.1…P.6
T1 T2 T3 Normal temperatures
T1…T3
Economy temperature
Holiday mode
Auto
Run Operating position
4Setting buttons
Day 1
6
1
-
-
...
5
7
7Block/day button
Switching pattern button
Set values lower
Set values higher
5Operating mode selector
Auto1...7 7-day mode with up to three
heating periods per day
24-hour mode with one
heating period
24-hour mode with two
heating periods
24-hour mode with three
heating periods
T3 Continuous normal tem-
perature
Continuous economy tem-
perature
Standby with frost protection
6Override button
7Warmer/colder button

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2.5 Startup
The controller is supplied with factory-set switching patterns, switching times and tempera-
tures.
2.5.1 First startup
For the first startup no tools are required.
Auto
Run
°C
T3
Day/
Day
T1 T2 T3 T1 T2 T3
P.1 P.2 P.3 P.4 P.5 P.6 Auto 1...7
1
6
1
-
-
...
5
7
7
1
6
1
-
-
...
5
7
7
1.5V 'AA'
1.5V 'AA'
1234567
0 6 12 18 24
COOLING
2276Z10
12 3 42.2
2.1
Proceed according to steps 1 to 4 as follows:
11.5V 'AA'
1.5V 'AA'
•Open the cover and remove the battery compartment
•Remove the black transit tabs from the two batteries
•Place the battery compartment into its correct position again. The
unit switches itself on
2Day/ Move the setting slider to this position.
2.1 Set the correct time of day with these buttons.
2.2 Day 1
6
1
-
-
...
5
7
7
Set the correct weekday with this button (1 = Monday…7 = Sunday).
3Auto
Run
Move the setting slider back to the position on the right, because only
that position allows you to close the cover.
4Auto1...7 Select the automatic mode with the operating mode selector .
Fold up operating instructions again, place them back into the cover and close the cover
again.
Note

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2.6 Short-term individual settings
These changes are valid only up to the next switching point.
2.6.1 Short-term increase/decrease of actual room temperature
°C By pressing these buttons, you increase or decrease the actual room tem-
perature in increments of 0.2 °C by a maximum of ±4 °C. The display first
shows the newly selected temperature and then the actual value again.
If, as a result of the factory settings, you always feel either too warm or too cold, you
should readjust the temperatures or on the settings level (see chapter "Description
of end-user settings) to suit your needs.
2.6.2 Short-term change of temperature level
When pressing this button, you change from the current temperature level
to the other. The display shows either , when the change was made
from the economy temperature, or , when it was made from the normal
temperature. This means you can select the economy temperature during
the time you are absent.
Caution!
Note

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14/30 Description of end-user settings Landis & Stefa Division
3 Description of end-user settings
3.1 Set the time of day or weekday
With the cover open, the time of day or weekday can be set as follows:
Day/ Move the setting slider to the time of day / weekday position and press
to set the required time of day.
Day 1
6
1
-
-
...
5
7
7
Press this button to select the new weekday
(1 = Monday / 7 = Sunday).
Auto
Run
Move the setting slider back to this position and close the cover.
3.2 Select operating modes
With the cover open, the following operating modes can be selected:
Auto1...7 Move the operating mode selector to 7-day mode. With that, you use
the 7-day setting with up to three heating periods per day.
Move the operating mode selector to 24-hour mode with one heating
period. With that, you use the 24-hour setting with one heating period.
Move the operating mode selector to 24-hour mode with one heating
period. With that, you use the 24-hour setting with two heating periods.
Move the operating mode selector to 24-hour mode with one heating
period. With that, you use the 24-hour setting with three heating peri-
ods.
T3 Move the operating mode selector to «Normal temperature». This en-
sures continuous heating to the normal temperature T3. The display
shows and .
Move the operating mode selector to «Economy temperature». This
ensures continuous heating to the economy temperature. The display
shows .
Move the operating mode selector to «Standby». In that case, heating
is provided only when the room temperature falls below the preset frost
protection limit (e.g. 5 °C). The display shows .
A detailed description of how to set the different modes and their possibilities is given in
the following sections.
Note

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3.3 Enter individual temperatures and heating periods
The controller is supplied with factory-set switching patterns, switching times and tem-
peratures. There are several switching patterns available that can be set to suit your
specific needs. You can either rely on the factory settings or make settings tailored to
your personal needs.
3.3.1 7-day time switch
The controller can be assigned to a 7-day switching pattern (weekday block 1-5 / week-
end block 6-7) with up to three different heating periods.
Proceed as follows:
Auto1...7 Move the operating mode selector to the 7-day time switch position,
enabling its blocks and switching patterns to be set. With that, you will
afterwards use the 7-day setting with up to three heating periods per
day.
1
6
1
-
-
...
5
7
7Move the setting slider to the position where the blocks (weekday 1-5,
weekend 6-7 or day 1…7) and switching patterns can be set.
Day 1
6
1
-
-
...
5
7
7
Select the required block (weekday 1-5, weekend 6-7 or
individual day 1…7) by pressing this button. Start to enter
the switching times on the required block (weekday 1-5 /
weekend 6-7) that are used for most of the days. After
that, if required, change with the individual day selection
(1…7) the settings.
If you make settings for individual days, the respec-
tive block will be cancelled and can be reinstated
only by making a reset.
Press this button to assign the required switching pattern
to the block.
P.1 Select the switching position (e.g. P.1) and press to enter
the required switching time.
T1 Select the temperature position (e.g. T1) and press to enter
the required temperature.
T1 is the temperature between the switching
points P.1 and P.2, T2 the temperature between the switching points
P.3 and P.4, and T3 the temperature between the switching points P.5
and P.6.
Select «Economy temperature» and press to enter the re-
quired value. The entered economy temperature is the same for all
blocks.
Auto
Run
Move the setting slider back to this position and close the cover.
If a position cannot be set, the display shows .
Note

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16/30 Description of end-user settings Landis & Stefa Division
3.3.2 Check settings of the 7-day time switch
The controller offers the possibility to check your settings of the 7-day time switch mode.
Proceed as follows:
Auto1...7 Move the operating mode selector to the position at the top.
Day 1
6
1
-
-
...
5
7
7
Press button. The switching patterns set for the individual
days are shown in consecutive order.
If corrections have to be made on your settings, proceed as described in the previous
section.
3.3.3 24-hour mode with one heating period
The controller can be assigned to a 24-hour switching pattern with one heating phase.
Proceed as follows:
Move the operating mode selector to 24-hour mode with one heating
period, enabling its block and switching pattern to be set. With that, you
will afterwards use the 24-hour setting with one heating period.
P.1 Select the switching position (e.g. P.1) and press to enter
the required switching time.
Enter switching position P.2 accordingly.
T1 Select the temperature position (e.g. T1) and press to enter
the required temperature.
T1 is the temperature between the switching
points P.1 and P.2.
Select «Economy temperature» and press to enter the re-
quired value.
Auto
Run
Move the setting slider back to this position and close the cover.
If a position cannot be set, the display shows .
Note
Note

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3.3.4 24-hour mode with two heating periods
The controller can be assigned to a 24-hour switching pattern with two heating periods.
Proceed as follows:
Move the operating mode selector to 24-hour mode with two heating
periods, enabling its blocks and switching patterns to be set. With that,
you will afterwards use the 24-hour setting with two heating periods.
P.1 Select the switching position (e.g. P.1) and press to enter
the required switching time.
Enter switching positions P.2 to P.4 ac-
cordingly.
T1 Select the temperature position (e.g. T1) and press to enter
the required temperature.
T1 is the temperature between the switching
points P.1 and P.2 and T2 is the temperature between the switching
points P.3 and P.4.
Select «Economy temperature» and press to enter the re-
quired value. The entered economy temperature is the same for all
blocks.
Auto
Run
Move the setting slider back to this position and close the cover.
If a position cannot be set, the display shows .
3.3.5 24-hour mode with three heating periods
The controller can be assigned to a 24-hour switching pattern with three heating peri-
ods.
Proceed as follows:
Move the operating mode selector to 24-hour mode with three heating
periods, enabling its blocks and switching patterns to be set. With that,
you will afterwards use the 24-hour setting with three heating periods.
P.1 Select the switching position (e.g. P.1) and press to enter
the required switching time.
Enter switching positions P.2 to P.6 ac-
cordingly.
T1 Select the temperature position (e.g. T1) and press to enter
the required temperature.
T1 is the temperature between the switching
points P.1 and P.2, T2 is the temperature between the switching points
P.3 and P.4, and T3 is the temperature between the switching points
P.5 and P.6.
Select «Economy temperature» and press to enter the re-
quired value. The entered economy temperature is the same for all
blocks.
Auto
Run
Move the setting slider back to this position and close the cover.
Note

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18/30 Description of end-user settings Landis & Stefa Division
3.3.6 Continuous normal temperature
The controller can be assigned to continuous normal temperature T3.
Proceed as follows:
T3 Move the operating mode selector to «Normal temperature». This en-
sures continuous heating to the normal temperature T3. The display
shows and .
T3 Select «Normal temperature T3» and press to enter the re-
quired value.
Auto
Run
Move the setting slider back to this position and close the cover.
3.3.7 Continuous economy temperature
The controller can be assigned to continuous economy temperature.
Proceed as follows:
Move the operating mode selector to «Economy temperature». This
ensures continuous heating to the economy temperature. The display
shows .
Select «Economy temperature» and press to enter the re-
quired value.
Auto
Run
Move the setting slider back to this position and close the cover.
3.3.8 Continuous standby with frost protection
The controller can be assigned to continuous standby with frost protection.
Proceed as follows:
Move the operating mode selector to «Standby». In that case, heating
is provided only when the room temperature falls below the preset frost
protection limit (e.g. 5 °C). The display shows .

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3.4 Holiday program
You can enter the start and the duration of your holiday period. In that case, the controller
switches to economy mode at the beginning of the holiday period and back to the selected
operating mode when the holiday period has expired. The display shows, with the holiday
symbol , the number of remaining days (e.g. 14) in the holiday period as follows:
1234567
06121824
2276Z15
To make settings, proceed as follows:
Move the setting slider to the holiday symbol.
Day 1
6
1
-
-
...
5
7
7
Press this button to set the start of the holiday period (max. 6
days in advance; 1 = Monday…7 = Sunday).
Press the arrow buttons to enter the duration of the holiday
period (1…99 days).
Auto
Run
Move the setting slider back to this position and close the cover.
If you re-
turn from your holidays earlier than expected, you have to reset the holiday
period to .
On completion of the holiday period, the controller will resume the selected operating
mode (e.g. Auto1...7).
Note

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3.5 Reset to standard values
By pressing these three buttons simultaneously, a complete reset is made, which means
that the switching times and temperatures will be reset to their default values.
All individual settings will be lost!
At the same time, a display check is made, which looks as follows:
1234567
06121824
COOLING
2276Z13
Die following table shows the default values that will be recalled after a reset:
2276Z12
T1 T2 T3
P.1 P.2 P.3 P.4 P.5 P.6
T1 T3
1-5
6-7
1...7
Auto 1...7
T3
6.00
1...7
1...7
1...7
1...7
8.00 11.00 13.00 17.00 22.00 19° C 20° C 21° C 16° C
T2
7.00
7.00
6.00
6.00
PASS
23.00
23.00
PASS
17.00 22.008.00
PASS PASS PASS PASS
PASS PASS PASS PASS
PASS PASS
8.00 11.00 13.00 17.00 22.00
PASS
PASS
PASS
PASS
PASS
PASS
PASS
PASS
PASS
PASS
19° C
19° C
19° C
19° C
20° C
20° C 21° C
21° C
16° C
16° C
16° C
16° C
16° C
PASS PASS
PASS PASS
PASS
PASS PASS
PASS PASS PASS
PASS
If the cooling function is activated (DIP switch is set to COOLING), the default values
T1…T3 are all set to 23 °C!
3.6 Battery change
If this symbol appears, you need to replace the batteries within the next three
months as follows:
•Get two new alkaline batteries type AA, 1.5 V
•Remove the battery compartment, then the batteries, insert the new batteries and
replace the battery compartment
•Make certain the old batteries are disposed of properly, in compliance with environ-
mental requirements
The setting data are maintained for a maximum of one minute only!
°C
Caution!
Note
Caution