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Siemens
Master room unit QAX850
CE1N2722en
Building Technologies
28.08.2007
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11
12
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14
4
1
27
2
2Z
01
1 Day
indication
2 Actual
temperature
3 Fahrenheit/Celsius
4
Zone indication (RRV856 and RRV852 for Duo-switch application)
5 AM/PM
indication
6 Time
display
7 System
off
8
Comfort mode (Day zone in Duo-zone application)
9
Energy saving mode (Night zone in Duo-zone application)
10
Auto timer mode
11 Heating
mode
12 Cooling
mode
13
Fan speed indication (low, medium and high)
14
Auto fan mode
Commissioning notes
When powering up, the QAX850 will display all LCD icons for approximately 3 seconds
and then the software version number for another 3 seconds. It will then revert to
normal display. The time segments will be blinking if time needs to be set. Set time as
per Operation Instructions. There will be a delay before operation commences due to
polling of all values.
Generally there is no need to calibrate sensor; however the displayed room
temperature on the LCD can be calibrated if there is any discrepancy from the 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 the top of the
RRV controller. Further settings can be made via the QAX850 by modifying parameters
as per list below. Default values are dependant on application selected and RRV
controller model. Refer to Installation Instructions for set-up details and application
sheets for default parameter values.
To access parameters press the and buttons simultaneously for 3 seconds, then
within 2 seconds press the button for 3 seconds and release. Parameters cannot be
accessed if system is in off mode.
No. Parameter
Range
P00 Temperature
scale
°C/F°
P01
Frost protection limit in OFF mode
Off/5…8 °C
P02
Over-temperature limit in OFF mode
Off/30…35 °C
P03
Min. OFF time delay
0
…
600 s
P04
Min. ON time delay
0…600 s
P05
Dead band between cool and heat OFF points
0.5…6 K
LCD display
Response on start-up
Sensor calibration
Commissioning
Set-up parameters
