Siemens QAX850, RRV856 Operating Instructions Manual
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
2/2 29.08.2008 CE1B2727en01 Building Technologies / HVAC Products
Do you wish to change to Auto Timer mode?
Press button until display shows symbol. The
system will automatically change over between Comfort
and Energy Saving mode according to 8 preprogrammed timers.
Do you want to change the temperature setpoints of
Comfort / Energy Saving mode?
Press , the symbol and setpoint value is
flashing indicating Comfort mode setpoint change
expected.
Press
or button to change this setpoint in steps of
0.5°C.
Press
to confirm and continue to the Energy
Saving
mode heating setpoint.
The
and symbol and setpoint value is flashing
indicating Energy Saving mode heating setpoint
change is expected; press
or button to change
this setpoint in steps of 0.5°C. Press
to confirm
and continue to the Energy Saving mode Cooling
setpoint.
The
and symbol and setpoint value is flashing
indicating Energy Saving mode cooling setpoint
change is expected, press
or button to change
this setpoint in steps of 0.5°C. Press
to save
the change.
Note:
If no button is pressed after 5 seconds, setpoint setting
changes will be saved and operational mode will resume.
Are you too warm / too cold?
You can temporarily adjust the temperature setpoint
when in Comfort
mode. Press or button to adjust
the temperature setpoint. You can increase or decrease
the room temperature setpoint in steps of 0.5°C. The
maximum range is from 5°C to 35°C, however it is
recommended to not exceed 18°C to 26°C range.
Setpoints will revert to permanent setpoint settings after
any mode change.
Do you want to view and set the Programmable Timer
setting?
Press button once to sequentially review the 8
auto timers.
To adjust the time schedule, hold for 3 seconds to go
into Programmable Timer Setting mode.
Auto timer 1 shows, A1 and
symbol displays
with time xx:xx flashing to indicate timer setting
change is expected for the Comfort mode.
Press
or buttons to adjust the Comfort mode
start time.
Press
button to set the days applicable to the timer.
The
1
symbol will flash. Press or button to
select or deselect each day and advance to the next
day.
Press
Z
button to set which zone is applicable to the
timer. The
Z1
symbol will flash. Press or button
to select or deselect each zone and advance to the
next zone.
Press
to save the changes for the Comfort
mode start time and advance to set the Energy
Saving mode start time.
The
and symbol displays with the time xx:xx
flashing. Press
or button to adjust the time. Only
the time can be adjusted. Day will follow Comfort
mode setting.
To cancel the timer, press
button until time
schedule changes to --:--.
Press
to save the Energy Saving mode
changes and advance to Auto timer 2.
Repeat the procedure for setting Timer A1 and
advance to next timer.
System will return to normal operational mode if no
button is pressed within 20 seconds. All modifications
made after last Time Schedule and
button
pressed will not be saved.
Do you want just heating?
Press button until display shows symbol only. The
system is restricted to heat. The
symbol will not
appear if your air conditioning equipment provides
cooling only.
Do you want just cooling?
Press button until display shows symbol only. The
system is restricted to cool. The
symbol will not
appear if your air conditioning equipment provides
heating only.
Do you want auto-changeover of heat / cool?
Press button until display shows both and
symbols. This indicates the system will activate heating
or cooling in order to maintain desired temperature
setpoint. This applies to heating / cooling air
conditioning equipment only.
Do you want ventilation fan only?
Press button until the and symbols are not
displayed. No heating or cooling will be provided - only
ventilation.
What is the green LED for?
The green LED indicates when zone airflow is on and heating or
cooling energy is activated.
Energy saving tips without sacrificing comfort
Never allow room temperatures to exceed 21°C when heating or
fall below 22°C when cooling.
Select Energy Saving mode even when you are absent for short
periods of time and select System Off mode when absent for
extended periods.
Although auto-changeover of heat / cool is possible, it is
recommended you select cool mode only in summer and heat
mode only in winter.
Note: This document provides user instructions only. For more
detailed technician information on the Multi-zone system, please
refer to
RRV856 installation / commissioning guide.
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