Pa
Recommended duct dimensions (mm)
Semi-flexible Rigid (PVC or steel)
CV 0 series
375 120
Ø 200 Ø 150
CV 1 series
575 120
Ø 250
< 20 m: Ø 150
>20 m: Ø 200
CV 2 series
950 120
Ø 315 Ø 200
CV 3 series
1250 120
Ø 315 Ø 250
CR 0 series
375 120
Ø 200 Ø 150
CR 1 series
575 120
Ø 250
< 20 m: Ø 150
>20 m: Ø 200
CR 2 series
1150 120
Ø 315 Ø 200
§ It is recommended a minimum length duct, avoiding placing unnecessary turns. Failing a detailed
calculation, it can be supposed that a 90º turn, with no internal radio, is equivalent to 5 m length.
§ If air intake is not ducted, an air intake adequate to the room should be planned.
§ It is not recommended the use of flexible ducts due to pressure loss, being only acceptable in case
of straight and very short stretches. If so, an aluminium semi-flexible duct as indicated diameters is
recommended.
22. START-UP
Before starting the unit,plese check that the unit is properly fixed on its supports and the electrical
connections are properly installed. If you have worked on the unit, take care not to forget tools or any
objects inside, that there is no gas leak and that assembly-connection are properly done.
Before starting up or after a stand-by periods, activating the crankage heater (when included) at
twelve hours in advance is recommended. Otherwise, the compressor must be warmed up in a
different way to ensure the refrigerant-oil separation. This operation is important, specially when
starting-ups in low ambiance temperatures.
Connect the electrical supply and switch on the unit with room door closed. The display will show the
room temperature and after the time as specified for Ods parameter the compressor will start.
Set the cold room temperature set point and wait until the cold room temperature reaches the set
point. The high temperature alarm will not be activated until the time of dAO parameter is elapsed.
Once the target temperature is reached, initialise the record of maximum and minimum temperature as
indicated in thism anual. You may check that auxiliary devices work properly:
§ Room light.- turn on and off the room light.
§ Door switch.- check that the compressor and fans stop when opening the door.
Force a manual defrost cycle to check this operation mode. make sure that the evaporation coil gets
clean and that the unit stays within the normal operating parameters without activating any safety
device.
Depending on the application you may need to modify defrost parameters, such as time
period between two consecutive defrost cycles, defrost cycle duration or termination
temperature. To do so, pay attention to the defrost cycles during normal operation.
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