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CE1N2722en 
28.08.2007 

Building Technologies

HVAC Products

 

 

2

722

 

 

 

 

 

 

Master room unit  

QAX850

 

for RRV… controllers 

 

 

Multifunctional, digital room unit for installer and end-user interface with RRV… 
controllers.  
2 wire bus connection 

Use 

Room unit in combination with an RRV… controller for HVAC plants in: 

 Residential apartments 

  Residential single house 

  Autonomous light commercial applications 

 
For use with RRV… controllers in air based plants including heating, cooling and 
ventilation (HVAC) equipment. Suitable for Standard, Duo-zone, Duo-switch and Multi-
zone applications. 

Functions 

  Remote control and monitoring of an RRV… controller 

  Parameter adjustments by installer 

  Room temperature measurement 

 

  Time clock operation 

  Comfort temperature setpoint adjustment 

  Energy saving temperature setpoints adjustment 

 Auto timer selection 

  Fan speed selection  

  Zone selection and settings (only for RRV controllers with zone outputs) 

  Display of operating mode, temperature, time, fan speed and zone values. 

Use 

Application 

Primary functions 

Operator functions 

Summary of Contents for QAX850

Page 1: ...n air based plants including heating cooling and ventilation HVAC equipment Suitable for Standard Duo zone Duo switch and Multi zone applications Functions Remote control and monitoring of an RRV controller Parameter adjustments by installer Room temperature measurement Time clock operation Comfort temperature setpoint adjustment Energy saving temperature setpoints adjustment Auto timer selection ...

Page 2: ...nents Room unit with integrated electronics and operating elements Internal temperature sensor Base for wall mounting with the connection terminals Operator interface buttons high use Operator interface buttons behind door low use 2722P01 1 2 3 4 5 6 7 8 9 10 11 1 LED for heat cool output status 2 LCD display with EL backlight for control and monitoring of modes setpoints zone conditions etc 3 Ope...

Page 3: ...e actual temperature measured with a certified thermometer Calibration function can be accessed by pressing the and buttons simultaneously for 5 seconds Displayed value can then be adjusted via the same buttons in 0 1K steps Range is 3 K Initial application set up of RRV controller to match the connected HVAC equipment is made by the selection of dip switch positions Dip switches are located on th...

Page 4: ...esistor sensor QAA32 or QAH11 to the RRV controller B1 input In this case the QAX850 automatically recognizes and displays the external sensor value Mounting and installation notes The QAX850 should be mounted in a location where the air temperature can be measured as accurately as possible without getting adversely affected by direct solar radiation or other heating or cooling sources There is no...

Page 5: ... HB Connection terminals For wires screw terminals 0 6 mm dia 2 5 mm2 Degrees of protection Degree of protection of housing to IEC 60 529 IP 30 Safety class to EN 60 730 device suited for use with equipment of safety class II Environmental conditions Operation to Climate conditions Temperature housing and electronics Humidity Mechanical conditions IEC 721 3 3 class 3K5 0 50 C 5 95 r h non condensi...

Page 6: ...1 Measuring range 0 49 C Room temperature measurement Setpoint range 5 35 C Accuracy at 20 C max 0 5 K Temperature calibration range max 3 0 K in increments of 0 5 K Room temperature display resolution 0 5 K Weight Excluding packaging approx 0 1 kg Notes The products may only be used in building services plant and applications as described above When using the products all requirements specified u...

Page 7: ... room unit QAX850 CE1N2722en Building Technologies 28 08 2007 Dimensions Room unit 96 119 23 8 3031M01 Base 89 45 4 3031M02 28 28 28 28 26 30 35 30 11 8 112 3 4 Dimensions in mm 2005 Siemens Switzerland Ltd HVAC Products ...

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