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QAA70
Room Unit
Basic Documentation
Edition 2.1
SW-Version 1.20 or higher
CE1P1638E
17.04.2000
Siemens Building Technologies
Landis & Staefa Division
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Landis & Staefa Division 17.04.2000
2.2 Electrical installation
2.2.1 Regulations for installation
First, mount and wire the base. Then, engage the unit at the bottom, swing it upward
and let it snap on.
The electrical installation must be made in compliance with local regulations.
2.2.2 Connection diagrams
Example 1
QAA70
D1D2D3D4D5D6
1638Z01
N1
Controller N1 with QAA70 room unit
D1D2D3D4D5D6
1638Z02
QAA70
N1
Controller N1 with QAA70 room unit and remote sensor
(room unit terminals D3 / D4)
Example 2
QAA70
D1
D2D3D4D5D6
1638Z03
N1
Controller N1 with QAA70 room unit and remote telephone switch
(room unit terminals D3 / D4)
Example 3
PPS connections between controller and room unit are interchangeable.
Note
Caution
External voltage may not be fed to terminals D3, D4 and D5!
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2.3 Commissioning
The room unit will automatically be switched on as soon as power is present. If re-
quired, the heating engineer can change the parameter settings to meet individual
needs.
Tips on commissioning
If, with weather compensation and room temperature influence (controller setting), the
room is equipped with a thermostatic radiator valve, the latter must be locked in its fully
open position, thus ensuring maximum flow through the radiator.
2.4 Display and operating elements
2.4.1 Operating elements
°C
AUTO
2273Z01
1
2
3
4
5
6
7
8
9
1 Display
2 Display presence button
3 Info button
4 Operating mode button
automatic mode
5 Operating mode button
manual operation
6 Operating mode button
standby
7 Cover
8 Temperature setting knob
9 Presence button
2.4.2 Display
7
04812162024
10
1
32
56
4
1638Z04
89
1 Digital display, clock
2 Heating program
3 Units (°C)
4 Display presence button
5 Outside temperature
6 Room temperature
7 Holiday function
8 Operating mode
9 Line number / current day
10 D.h.w. temperature
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2.5 Operation
During operation, the unit cover must be closed!
2.5.1 Selecting the operating mode
2273Z03
AUTO
Press the required operating mode button. The
display will show your choice as
Automatic mode
The heating operates automatically according to the selected heating pro-
gram. The program can be temporarily overridden by pressing the presence
button.
Manual operation
The heating system is operated manually, depending on the choice made
with the presense button
Standby
The heating is switched off. Frost protection is ensured.
The above selections do not affect the d.h.w. operating mode.
Note
2.5.2 Info button
2273Z04
AUTO
When the Info button is pressed, the display shows the following values in successive
order:
Weekday, time of day, room temperature
Weekday / time of day
Outside temperature *
* This display appears only if the respective sensor is connected
The room unit continues to operate independent of the selected display.
Note
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2.5.3 Temperature readjustments
Before making any room temperature readjustments on the room unit, thermostatic
radiator valves – if present – must be set to the required temperature!
°C
If it is too warm or too cold in your apartment, you can turn the tempera-
ture setting knob to change the nominal room temperature.
If you turn the setting knob toward +, you raise the nominal tem-
perature 1 °C per graduation.
If you turn the setting knob toward -, you lower the nominal tem-
perature by 1 °C per graduation.
Before making any new readjustments, wait some time, allowing the room tempera-
ture to adapt.
Note:
With the temperature setting knob, you only readjust the nominal room temperature.
The reduced room temperature will not be changed. The temperature is displayed only
if the room temperature controller operates in automatic mode
or with manual opera-
tion
.
2.5.4 Presence button
2273Z05
If you do not use your rooms for longer periods of time, you can press
the presence button, thus saving heating energy. When your rooms are
occupied again, press the presence button again to provide heating.
The display shows the selection made:
Heating to the nominal temperature
Heating to the reduced temperature
In manual operation
, the selection made acts continuously, in automatic mode
only until the next switching action according to the heating program takes place.
Note:
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3 Parameter settings for the end-user
3.1 General
To set the parameters of the QAA70, the unit cover must be open!
2312Z05E
Line number
Value
Select line number
Change value
As soon as the cover is opened,
the display and the button func-
tion will change. Then, the framed
number indicates the program
lines that can be selected with the
arrow buttons
and .
You can set or display the following values:
Temperatures
to
Heating program
to
Weekday and clock
to
Current values
to
Duration of the holiday period
Resetting to the default values
3.2 Setting the temperatures
Before making any room temperature readjustments on the controller, thermostatic
radiator valves – if present – must be set to the required temperature!
In automatic mode, the controller switches between nominal and reduced room tem-
perature according to the heating program.
Nominal temperature:
Room temperature during room occupancy times
(basic setting)
Reduced temperature:
Room temperature during absence or in the night
D.h.w. temperature:
Required d.h.w. temperature.
(only for controllers with d.h.w. function)
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3.3 Heating program
With the heating program, you can predetermine the temperature changeover times for
one week.
The seven-day program consists of a seven-day block (1-7) in which every day uses
the same program, or single days (1…7) with seven individual 24-hours programs (1 =
Monday…7 = Sunday). Each 24-hours program offers three heating periods each of
which is defined by a start and an end time.
If you do not require a certain heating period, you need to enter the same time of day
as the start and the end time.
0
4
812
16
20 24
1
2273Z07
3
2
Select the respective day for the heating period. You have
the choice of the seven-day block (1-7) and of individual
days (1…7) (1 = Monday …7 = Sunday)
Start of heating period 1: heating to the nominal tempera-
ture
End of heating period 1: heating to the reduced tem-
perature
Start of heating period 2: heating to the normal tempera-
ture
End of heating period 2: heating to the reduced tem-
perature
Start of heating period 3: heating to the normal tempera-
ture
End of heating period 3: heating to the reduced tem-
perature
3.4 Setting the time of day
For setting the current weekday
(1 = Monday…7 = Sunday).
For setting the current hour and minute
With
and , you set the correct time of day. Continuous pressing of these but-
tons accelerates the display.
3.5 Actual values
Display of the actual d.h.w. temperature
Display of the actual boiler temperature
Display of the actual flow temperature
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3.6 Holiday function
For entering the number of days during which you will
be absent.
The display shows the holiday symbol (
), the first
day of the holiday period on the left (1 = Mon-
day…7 = Sunday), and the number of days of the
holiday period on the right
During the holiday period, the controller
switches to standby
At the end of the holiday period, the con-
troller switches to the automatic mode
The holiday function can be cancelled by pressing any of the operating mode buttons.
Note:
3.7 Retrieving the default values
To retrieve the default values, press
and for
at least 3 seconds. As a confirmation, the display
shows
¦
Caution!
In that case, the values of the following line numbers that have previously been en-
tered will be lost!
Temperature and time program to
Duration of the holiday period
3.8 Default values
Designation Value Unit
Nominal temperature
20 °C
Reduced temperature
14 °C
D.h.w. temperature
60 °C
Working day program
(days 1-5)
ON
OFF
ON
OFF
ON
OFF
06:00
22:00
24:00
24:00
24:00
24:00
hh:mm
Weekend program
(days 6-7)
ON
OFF
ON
OFF
ON
OFF
08:00
23:00
24:00
24:00
24:00
24:00
hh:mm
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Status display
No display:
1638Z05
No power at the heating controller
Faulty connection between room unit and heating
controller
Room unit and heating controller not compatible
Room unit faulty
Display:
1638Z06
Programming lock active
Heating controller’s operating mode is not set to man-
ual operation
Display:
1638Z07
No sensor connected or sensor faulty
Display:
1638Z08
Remote telephone switch (external contact) active
Display flashes:
1638Z09
Room unit is in the initialization phase (rotating circle)
4 Operation by the heating engineer
The QAA70 room unit has a service and parameter setting level to give the heating
engineer additional setting choices. This level can only be activated by pressing a cer-
tain combination of buttons.
4.1 Activating the service and parameter setting
level
Keep buttons and depressed for at least 5 seconds. This will activate the ser-
vice and parameter setting level.
Then, press the same arrow buttons to select the individual entry line and adjust the
values by pressing
or .
4.2 Settings
Device address for the
PPS interface
This line is used for setting the PPS address (for QAA70 room units connected
to RVA... controllers, default address 1 should not be changed)
The display shows the status of the PPS:
Colon flashing at one-second intervals: communication o.k.
Steady or missing colon: ready to communicate
Steady hyphens: communication interrupted
Device identification
The display shows the identification number and the software-version.
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Programming lock end-
user level 2
When activating the programming lock (parameter 53 = 1), all parameters can be
displayed but not changed.
When pressing
or , the display will show OFF.
Caution!
The operating lock can temporarily be deactivated. This is accomplished by si-
multaneously pressing
and for at least 5 seconds.
To cancel the operating lock permanently, parameter 53 must be set to 0.
Function of input D3/D4
The freely programmable input (terminals D3 and D4) permits the application of
three different functions. The parameter has the following meaning:
1 = connection of an external sensor type QAW44; the display shows the tem-
perature acquired by the external sensor
(- - = no sensor connected, function deactivated)
2 = using an external contact, changeover to the reduced temperature can be
accomplished; the display shows the current status of the external contact
(ooo = contact CLOSED, - - - = contact OPEN)
3 = using an external contact, changeover to the frost protection temperature
can be accomplished; the display shows the current status of the external
contact (ooo = contact CLOSED, - - - = contact OPEN)
AL = this function is not used
Operating action of
external contact
If input D3/D4 is connected to an external potential-free contact (parameter 55 =
2 or 3), the operating action of the contact (remote telephone switch or window
switch) can be selected; the operating action designates the contact status at
which the required function is active.
Display: ooo = contact CLOSED
- - - = contact OPEN
Influence of external room
temperature sensor
Determines the mixing ratio of internal and external room temperature sensor if
parameter 55 = 1.
0 % = internal sensor only (0 % external, 100 % internal)
50 % = mean value of external and internal sensor
100 % = external sensor only
For room temperature control and the display, the adjusted mix is used.
If the external sensor is affected by a short-circuit or an open-circuit, the internal
sensor will be used to ensure operation.
Display of setpoint
This setting switches programming lines 1 and 2 (normal/reduced temperature)
from the absolute display of the temperature to the relative display.
4.3 Leaving the service and parameter setting
level
When closing the unit cover, the service and parameter level will be quit and the set-
tings made stored.
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5 Example of plant
1638S01
T
N1
B3
B2
E1
B5
M1
M3
B9
M
T
T
B2 Boiler temperature sensor
B3 D.h.w. temperature sensor
B5 Room unit QAA70
B9 Outside sensor
E1 Burner
M1 Heating circuit pump
M3 D.h.w. charging pump
N1 Controller
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Landis & Staefa Division Example of plant 17.04.2000
6 Technical data
Nominal frequency 50…60 Hz
Overvoltage protection
Max. permissible voltage DC 24 V (terminals D1/D2)
-13…5 V (terminals D3/D4)
Safety class to EN 60730 III
Degree of protection to EN 60529
(when mounted on a closed wall) IP 30
Electromagnetic compatibility
Immunity EN 50082-2
Emissions EN 50081-1
conformity
Electromagnetic compatibility 89/336/EEC
Low voltage directive 73/23/EEC
Perm. ambient conditions to IEC 721:
Operation 3K3 (IEC 721-3-3) 0…35 °C
Transport 2K3 (IEC 721-3-2) -25…70 °C
Storage 1K3 (IEC 721-3-1) -25…70 °C
NTC temperature sensor:
Time constant 10 min.
Thermal coupling to the wall 50 %
Permissible cable lengths
0.25 mm
2
25 m
From 0.5 mm
2
50 m
Weight 0.22 kg
Backup of clock 12 h
Room temperature measurement range 0...32 °C
Setting ranges:
Nominal temperature 5...30 °C
Reduced temperature 5...30 °C
Temperature readjustment range ±3 °C
Resolution 0.5 °C
Ordering multiple 20 pieces
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Siemens Building Technologies Room Unit QAA70 CE1P1638E
Landis & Staefa Division Technical data 17.04.2000
7 Dimensions
QAA70 room unit
40,5
97
34
41
2273M01
143
2828
1638M01
30 30
80
28
4,2
3030
28
12
5
90
40,5
32
2273M03
100
QAW44 remote tempera-
ture sensor
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Landis & Staefa Division Dimensions 17.04.2000
Index
A
activating parameter setting level .............................14
activating the service ................................................14
actual values.............................................................12
automatic mode ..........................................................9
B
brief description...........................................................5
C
commissioning ............................................................8
connection diagrams...................................................7
D
default values............................................................13
display.........................................................................8
E
electrical installation....................................................7
engineering .................................................................6
example of plant........................................................16
F
field of use...................................................................5
H
handling ......................................................................6
heating engineer additional setting choices..............14
heating program........................................................12
holiday function.........................................................13
I
info button ...................................................................9
M
manual operation ........................................................9
O
operating elements......................................................8
operating functions......................................................5
operation .....................................................................9
P
parameter settings ....................................................11
presence button ........................................................10
product liability ............................................................6
product range..............................................................5
R
regulations for installation ...........................................7
S
selecting the operating mode......................................9
setting of heating circuit ............................................14
setting the temperatures ...........................................11
standby........................................................................9
status display ............................................................14
T
technical data............................................................17
temperature readjustments .......................................10
time of day.................................................................12
19/20
Siemens Building Technologies Room Unit QAA70 CE1P1638E
Landis & Staefa Division Index 17.04.2000
Siemens Building Technologies AG
Landis & Staefa Division
Gubelstrasse 22
CH 6301 Zug
Tel. 41 41-724 24 24
Fax 41 41-724 35 22
www.landisstaefa.com
© 1999 Siemens Building Technologies AG
Subject to alteration
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Siemens Building Technologies Room Unit QAA70 CE1P1638E
Landis & Staefa Division 17.04.2000
18


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