Operation Manual

ManualsBrandsSiemens ManualsAir ConditioningQAW20

812

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 th

e 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

Summary of content (8 pages)

PAGE 1
2 812 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 connection with the • WRI80 control and heat meter interface • WRV… control and heat cost allocation valve .
PAGE 2
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.
PAGE 3
2812Z03 Display Setpoint readjustment 2812Z12 0 Economy button 2811X06 °C 4 8 12 16 20 The QAW20 features an LCD showing all relevant information in every situation. 24 With the setting knob, the nominal room temperature setpoint can be readjusted by ±3 °C. Any readjustment is added to the programmed nominal setpoint while the reduced setpoint remains unchanged. The economy button permits changeover from the nominal to the reduced room temperature, or vice versa.
PAGE 4
With the heating program, the required room temperature can be programmed for 1 week. The heating program consists of seven 24-hour programs each comprising 3 heating periods. Each of these periods is defined by a start time and an end time. The actual 24-hour program is shown on the display's time bar the resolution of which is 1 hour. Dark fields represent periods with the nominal room temperature. When start and end time of a period coincide, the period is inactive.
PAGE 5
out a remote sensor, only the internal sensor signal is used. The value measured by the remote sensor is displayed on the service level. The connection of a remote sensor is recommended when: • The room unit is not installed in the reference room • The room unit is exposed to a heat source that produces heat gains Functions 2…4: Potential-free contact for different functions Using a potential-free contact, various functions can be controlled from a remote location.
PAGE 6
The mounting location should be chosen such that the sensor will acquire the room temperature as accurately as possible, with no influence from direct solar radiation or other heating or cooling sources. In the reference room where the QAW20… is mounted, there should be no radiators with thermostatic radiator valves. If there are, they must be set to their fully open position. Programmable input The connection terminals are suitable for the following cross-sectional areas: Stranded wire or solid wire 0.
PAGE 7
Connection terminals for the following crosssectional areas: Stranded wire or solid wire Stranded wire with ferrule Reserve of clock Weight 0.25…2.5 mm2 max. 2 x 1.5 mm2 12 h 0.22 kg Perm. Cable lengths between room unit and conduit box 0.6 mm dia. 0.8 mm dia.
PAGE 8
Examples With WRI80 B1 Room unit QAW20 in the reference room E1 Reference room of the apartment E2 Other room of the apartment W1 Heat meter WFQ21… / WFM21… X1 Conduit box ALW84 X2 Control and heat meter interface WRI80 Y1 Motorized valve VVP… / SSP… or SSB… Y2 Shutoff valve Y3 Thermostatic radiator valve Y4 Manual valve Y5 Throttling valve B1 X1 BUS X2 E2 Y3 E1 Y4 E2 Y3 2812S02 Y2 M Y2 Y5 With WRV… W1 Y1 B1 Room unit QAW20 in the reference room E1 Reference room of the apartment E2 Other room