Building Technologies / HVAC Products CE1B2727en01 29.08.2008 1/2
B2727.01
Operating instructions QAX850 / RRV856
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
Z1
...
Z6
zones together with the standby
symbol
. Some systems will include extreme high / low temperature protection activation during – contact your supplier for
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 to confirm..
If current time is 12-hour format and you wish to change to 24-hour format, press
button passing 11:59PM or press button
passing 12:00AM.
If current time is 24-hour format and you wish to
change to 12-hour format, press
button passing
23:59 or press
button passing 00:00.
Press
button 2 times within 2 seconds. Day
symbol flashes.
Press
or button to set the current weekday.
Press
to confirm. (
1
= Monday through
7
= Sunday).
Zone control
Remote operation of other zone room units is
possible via this master room unit by pressing the
Z
button. Zones are numbered and indicated by
the
Z2
...
Z6
symbols.
Operation modes
Press button to cycle through local zone off
or Comfort or Energy Saving or Auto
Timer
mode.
Do you wish to turn off this zone?
Press button until display shows symbol.
The local comfort zone will be switched off.
Do you wish to change to Comfort mode?
Press button until display shows symbol.
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 symbol.
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.
System Off
Comfort mode: System operates to maintain
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
A1 ... A8
Time program
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
/
Weekday
1
..
7
Z
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