Pump Unblocking Procedure; Utput #Onlguration; Pump Down; Silent Mode - CIAT YUNA II series Installationsanleitung

)F CODE   WATER PUMP IS ALWAYS RUNNING DURING SPACE
heating/cooling operations.
)F CODE   WATER PUMP IS TURNED /&& IF ROOM
TEMPERATURE OVERSHOOTS THE SETPOINT VALUE BY CODE  ›#
AND TURNED /. IF ROOM TEMPERATURE IS BELOW IN HEATING
ABOVE IN COOLING ROOM SETPOINT BY CODE  ›# 

4.8 - Pump Unblocking Procedure

4HIS FUNCTION IS ACTIVE IN ALL OPERATIVE MODES INCLUDING
OFF.
)F THE WATER PUMP IS /&& FOR  HRS IT IS ACTIVATED FOR
some time to avoid locking.
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-ULTI PURPOSE OUTPUT SEE PARAGRAPH Terminal Block
Description CAN BE CONlGURED TO PERFORM DIFFERENT
FUNCTIONS CODE  
4.9.1 - Fan coil
The output can be used to turn ON/OFF fan coil units.
The available options are shown in the variable table.
 $EHUMIDIlER
4HE OUTPUT IS USED TO TURN /./&& A DEHUMIDIlER
$EHUMIDIlER IS TURNED ON IN #OOL MODE WHEN HUMIDITY IS
higher than the value of code 110.
It works only if room control is done by user interface
CODE   OR  
4.9.3 - Alarms/Defrosting
4HE OUTPUT IS ACTIVATED TO SIGNAL SOME SPECIlC CONDITIONS
See variable table for details.

4.10 - Pump Down

3ETTING CODE   IT IS POSSIBLE TO FORCE THE OUTDOOR
UNIT IN #OOL MODE ALSO IN CASE OF (EATING ONLY SYSTEMS
FOR  MINUTES TO ALLOW THE PUMP DOWN OF THE REFRIGERANT
!FTER  MINUTES OF OPERATION THE CODE IS AUTOMATICALLY
reset to 0.
!FTER 0UMP $OWN THE UNIT WILL REMAIN /&& UNTIL THE
electrical power is reset.
ÁĽÆÌ Ǽ½
It is possible to reduce the maximum compressor
FREQUENCY IN DElNED TIME PERIODS
See user interface manual.
Frequency reduction is expressed as % of maximum
frequency and is set by code 3.
7HEN 3ILENT MODE IS ACTIVATED THE OUTDOOR UNIT WILL BE
LESS NOISY BUT ALSO LESS POWERFUL THEREFORE BACKUP AND
booster heaters can be used more often.
26

4.12 - Zone Control Settings

#ODE  DElNES THE TYPE OF ROOM CONTROL WHICH IS
implemented.
0. No control: Room temperature is not controlled;
comfort is only depending on climatic curve settings.
 5SER INTERFACE !N ADDITIONAL USER INTERFACE SEE
paragraph Accessories) is connected to the unit and is
placed in the room.
2. Sensor: Used only in combination with 2-zone kit.
3. Thermostat: A thermostat is connected to the Heat/
Cool thermostat input.
4. Unit user interface shifted: Unit user interface is
removed from the unit and installed in the room.
)F THE USER INTERFACE IS SHIFTED lLL THE GAP ON THE UNIT WITH
THE CAP PROVIDED SEE lG  ITEM  

4.13 - Input Related Functions

See paragraph Wiring Connection Diagram.
All the inputs are dry contacts.
)NPUT CAN BE INDEPENDENTLY CONlGURED CODE  TO BE
considered active when open or when close.
4.13.1 - Domestic hot water input
See Domestic hot water function.
4.13.2 - Heat/Cool thermostat input
This input can be used to start/stop space heating/cooling
operations.
)F A ROOM THERMOSTAT IS USED CONNECT IT TO THIS INPUT
4.13.3 - Heat/Cool selection input
This input is used to put the system in Heat mode or in
Cool mode.
It is used only if code 106.4 is set to 0.
4.13.4 - High energy rate input
)F THIS INPUT IS ACTIVE AND A BOILER BACKUP IS PRESENT THE
outdoor unit turns off and boiler backup is used to meet
the heating and domestic hot water operation.
)T HAS NO EFFECT IN #OOL MODE UNLESS WHEN DOMESTIC HOT
water is produced.
4.13.5 - System ON/OFF input
This input is used to put the system in OFF mode.
ÁË»½ÄĹƽÇÍË
7HENEVER THE COMPRESSOR TURNS OFF IT STAYS OFF FOR AT LEAST
3 minutes.
Additionally the compressor is prevented to start if
previous start happened less than 10 minutes before.
This time period is referred to as "timeguard"
$O ./4 DISCONNECT THE ELECTRICAL POWER EVEN IF THE
system is not used for a long time.
4O SWITCH OFF THE SYSTEM PUT IT IN /&& MODE THIS WILL
activate system protections to improve the life of the unit.