Siemens QAX850 Operating Instructions

Operating instructions

QAX850 is a master room unit for the RRV856 multizone control system. This system allows you to control your heating and / or cooling and
to set your ideal temperature conditions within various zones in the building. The system provides Comfort, Energy Saving and Auto Timer
mode with a 7-day programmable schedule. Factory settings are already set however you can adjust these to suit your personal needs.
System On and Fan Speed control
Press to turn system on or off and to select fan speeds - Low / Medium / High / Auto Fan and System Off. If your system is
/
single speed fan only, then simply press to turn system on or off.
There may be delays on start-up and after changes in mode. This is normal, as there are time delays built in to ensure safe
operation of the system.
When powering up, the QAX850 will display all LCD symbols. It will then revert to the normal display. The time segments will be
flashing if time needs to be set.
The system off mode turns the whole system off and is indicated by the applicable
symbol . Some systems will include extreme high / low temperature protection activation during
further details.
Setting actual time and day
Press button one time to set the time clock. (You will need to reset clock if there is a power loss of more than 20 minutes.)
Press or button to set the current time and then press
If current time is 12-hour format and you wish to change to 24-hour format, press
passing 12:00AM.
Building Technologies / HVAC Products
System Off
Comfort mode: System
comfortable room temperature
Energy saving mode: System operates only when
actual temperature reaches energy saving setpoints
Auto timer mode: System will switch from comfort
mode to energy saving according to program settings
Heating
Cooling
Time program
A1 ... A8
AUTO Auto fan – Fan speed changes automatically
depending on heating/cooling demand from all zones
Low / Medium / High fan speed
1 7 Weekday indication
...
Z1 Z6 Zone indication
...
Z1
...
to confirm..
button passing 11:59PM or press
CE1B2727en01
B2727.01
QAX850 / RRV856
operates to maintain
Z6
zones together with the standby
– contact your supplier for
button
If current time is 24-hour format and you wish to
change to 12-hour format, press
23:59 or press button passing 00:00.
Press button 2 times within 2 seconds. Day
Weekday
symbol flashes.
1 7
..
Press or button to set the current weekday.
Press to confirm. (
7
= Sunday).
Zone control
Remote operation of other zone room units is
Z
possible via this master room unit by pressing the
Z
button. Zones are numbered and indicated by
Z2 Z6
the ... symbols.
Operation modes
Press button to cycle through local zone off
or Comfort or Energy Saving
Timer mode.
Do you wish to turn off this zone?
Press button until display shows
The local comfort zone will be switched off.
Do you wish to change to Comfort mode?
Press button until display shows
Room temperature is maintained according to
Comfort setpoint and actual room temperature. A
Heat or Cool symbol will be displayed to
indicate the selected system mode.
Do you wish to change to Energy Saving mode?
Press button until display shows
This is typically the mode for night time or
unoccupied periods where you require internal
temperature not to drift to an extreme level. A Heat
or Cool symbol will be displayed to indicate
the selected system mode.
29.08.2008
button passing
1
= Monday through
or Auto
symbol.
symbol.
symbol.
1/2