Siemens QAW20 Bruksanvisning
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Sida 1/8
2812
SYNERGYR®
Room Unit QAW20
Programmable room unit for operation of the SYNERGYR® control and billing
system. The unit's setting knob and economy button make it very easy to control
the supply of heat. 7-day heating program, adjustable temperature setpoints,
selection of operating mode and info button.
Use
QAW20 is the room unit for reference room-compensated temperature control in con-
nection with the
• WRI80 control and heat meter interface
.
• WRV… control and heat cost allocation valve
For the field of use of the SYNERGYR® system, refer to Data Sheets N2800 to N2803
(System Overview).
.
Functions
.
.
.
.
.
.
The QAW20 is a combination of room temperature sensor and operator and control unit
for use with the control and heat meter interface or the control and heat cost allocation
valve. Using a digital 2-wire interface, it delivers the setpoint for temperature control by
the WRI80 or WRV… . This can be accomplished via a 7-day heating program or by
manual action. The QAW20 also serves as a display unit for the WRI80 or WRV… and
other metering devices connected to SYNERGYR®.
CE1N2812en
13.08.2010 Building Technologies
Operation All operating elements that are required for normal operation are easily accessible:
• Operating mode buttons
• Info button for the actual meter readings
• Economy button
• Setpoint readjustment knob
Programming To program and display specific values, a cover must be removed. The unit then
switches automatically to the programming level and the display shows the required
data:
• Temperatures and heating program
• Weekday and time of day
• Meter readings on the set day
• Holiday period
• Retrieval of standard values
Programming is made in 2 steps. First, the entry line is selected and then the respec-
tive value changed. Operating Instructions which explain all steps are located under the
cover. The programming level can be locked if these setting choices shall not be ac-
cessible.
Automatic operation
The heating program controls setpoint changeover. It can be temporarily over-
ridden by pressing the economy button. The overriding action then remains in
effect until the next heating program switching action occurs (refer to «Economy
button»).
Manual operation
The required room temperature is selected by pressing the economy button
(refer to “Economy button”).
Standby
The room temperature is maintained at a minimum level preselected either at the
central unit or the room unit.
Operating modes
2812Z11
AUTO
Each time the info button is pressed, the values
shown on the list below are displayed in successive
order. The selected display is maintained until the info
button is pressed again. Heating control continues to
operate independently of the selected display.
Info button
Time of day, room temperature
Weekday, time of day
Outside temperature*
% Heat consumption trend
Meter reading of space heating (heat consumption)
Meter reading of DHW*
Meter reading of gas*
Meter reading of electricity*
Meter reading of other meters*
* These displays appear only if the respective signal sources are connected
Note If several meters of the same type are used, a number appears in addition to the symbol.
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Siemens Room unit QAW20 CE1N2812en
Building Technologies 13.08.2010
2812Z03
0 4 8 12 16 20 24
The QAW20 features an LCD showing
all relevant information in every situa-
tion.
Display
°C
2812Z12
With the setting knob, the nominal room temperature setpoint can be read-
justed by ±3 °C. Any readjustment is added to the programmed nominal set-
point while the reduced setpoint remains unchanged.
Setpoint readjustment
2811X06
The economy button permits changeover from the nominal to the reduced
room temperature, or vice versa. The action of the economy button in auto-
matic and manual operation is as follows:
In manual operation, the selected setpoint is maintained until the but-
ton is pressed again.
0 4 8 12 16 20 24 h
2812Z17
Action of economy button in
manual operation
In automatic operation, the actual setpoint is temporarily overridden
when pressing the button. The next time the heating program per-
forms a switching action, the controller will resume the programmed
heating operation.
048 12 16 20 24 h
2812Z18
Action of economy button in
automatic operation
Economy button
Setpoints The temperature of the reference room is controlled to t he selected setpoint. There is a
choice of two temperature settings. Changeover is accomplished either by the time
program or the economy button.
Nominal room temperature
Reduced room temperature
Setpoint generation The nominal and the reduced setpoint are selected on the programming level. In the
case of the nominal setpoint, the readjustment made with the knob on the unit is added
to the basic setting.
There are two choices: Setpoint limitation
• Central limitation via the OZW30 central unit
• Locally by limiting the angular rotation of the knob by means of pins at the rear of the
room unit
7-day clock The time of day and weekday are set on the programming level of the unit:
• Display of time of day from 00.00 to 23.59 hrs
• Display of weekday from 1 through 7
If an OZW30 central unit is installed, the clock of the QAW20… is synchronized by the
that unit. In that case, setting of synchronization on the room unit is not possible.
Clock synchronization
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Siemens Room unit QAW20 CE1N2812en
Building Technologies 13.08.2010
Produktspecifikationer
| Varumärke: | Siemens |
| Kategori: | Termostat |
| Modell: | QAW20 |
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