User Manual

Building Technologies / HVAC Products CE1G2727en 23.03.2005 3/5
STOP
Note!
• All Input and bus terminals are not protected
against connection to AC 230 V.
• Observe the technical data for fan relay outputs:
Max. AC 250 V, 6(4) A.
• All output cables used must satisfy the insulation
requirements with regard to mains potential.
• AC 24 V outputs must be segregated from AC 250 V
outputs.
• Care should be taken when cables pass through
sharp metal openings, conduits or ducts.
• Double insulation on output cables is recom-
mended.
• Local installation regulations must be observed.
Commissioning
Preparatory checks
1. DO NOT switch on power.
2. Check wiring according to the plant connection dia-
gram.
3. Ensure correct position of Dip switch settings to
match the HVAC equipment.
4. The pre-configured application is selected by the Dip
switch located at the top of the RRV856 controller.
5. Set zone addresses via Dip switches on the back of
each zone controller.
6. Zone damper postions must be set so that they are in
the closed position when zone damper Q... outputs
are de-energised.
7. Verify output operation after power has been con-
nected to controller, by adjusting setpoints until there
is demand for heating or cooling.
8. Ensure all motorized zone dampers are open for
system air balancing.
9. When switching on power.
− The power LED on the RRV856 will be on
− The QAX850 will display all LCD icons for 3 sec-
onds and then the software version number for an-
other 3 seconds. It will then revert to normal mode.
Time segments on the QAX850 will be blinking if
time needs to be set.
− The LED on the QAX850/QAW850 will be flashing
if there is a communication error between the
RRV856 and QAX850/QAW850.
10. Power must be switched off to reset application
11. An adhesive label is included in the packaging for
final recording of Dip switch positions.
Digital inputs (D1, D2)
• A potential free contact closed across the D1 and
D_GND terminals will override to comfort when mode
selector is set to Auto timer mode only.
• D2 can be configured for an emergency heat enable
signal or an external fault lockout signal. Either of these
functions can be selected via the configuration Dip
switches.
• When emergency heat is selected, a potential free con-
tact closed across the D2 and D_GND terminals will
disable the primary heating output and enable the
emergency heat output. The emergency heat output will
only activate when there is demand for heating. Not
available on applications A2, A3, A4 and A5.
• When external fault (default) is selected, a potential free
contact closed across the D2 and D_GND terminals will
de-activate all outputs and the standby icon on the
QAX850 LCD will flash to indicate the fault. Fault will
disappear after contact is opened.
QAW850 digital input
A digital input (D1, M) on the back of the QAW850 is
available for connection to a window contact or switch.
When activated the zone will override to zone off mode.
Default is normally closed (NC) and can be adjusted via
parameter P16.
RRV856 Dip settings
Function Selections 1 2 3 4 5 6 7
Auxiliary heat 20 min delay off off - - - - -
Auxiliary heat 10 min delay on off - - - - -
Emergency heat via D2 off on - - - - -
Y3 Aux. output
2
nd
stage cool or compressor on on - - - - -
Single speed - - off - - - - Fan speed
Three speed - - on - - - -
A1 – Heat only - - - off off off off
A2 – Cool only - - - on off off off
A3 – Cool / Heat (HHW) - - - off on off off
A4 – Cool / Heat (EDH) - - - on on off off
A5 – Heat pump (comp + RV) - - - off off on off
A6 – Heat pump (heat/cool) - - - on off on off
A7 – 4 pipe FCU - - - off on on off
Application
A8 – 2 pipe FCU - - - on on on off
Installer level parameter settings
• Default parameter values are suitable for basic system
operation. If default values are not suitable for a particu-
lar installation, then adjustment can be made. Refer to
application sheets for default values or follow the instruc-
tions below:
1. Simultaneously press together the
and buttons
on the QAX850 for 3 seconds, release, within 2 sec-
onds press the
button for 3 seconds.
2. P00 will appear on the LCD.
3. Press
to view the parameter.
4. Press
or for adjustment.
5. Press
to save the adjustment.
6. Continue through all the parameter list to return to
normal mode.
7. If all zone room units will not change from zone off
mode; check for correct setting of parameter P16.
Time out
•
If no adjustment is made within 20 seconds while chang-
ing parameter values, the controller will exit and return to
normal mode.