Carel Hecu CO2, Руководство пользователя

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22
ENG
Hecu
C O
2
+0300085EN rel. 2.2 - 07.05.2019
6. FUNCTIONS
6.1 Unit ON/OFF
The unit can be switched on and off as follows:
•
User terminal
•
Supervisor
•
Digital input
On-off from the user terminal and the confi guration parameters are
available under the main menu, branch Ac
On-off from the supervisor and from the digital input and start-up after a
blackout (with specifi c delay, to avoid continuous starts and stops in the
event of instability in the power supply) need be enabled.
On-off from the digital input is equivalent to an enabling signal, that is, if
the digital input is Off the unit cannot be switched on in any other way,
while if it is On, the unit can be switched on or off in any other way, with
the same priority (the most recent has precedence, whatever the origin),
as shown in the fi gure:
User interface
Supervisor
Digital Input
Unit On/Off
Fig. 6.a
Note : certain special conditions or functions in the Hecu CO2
software require the unit to be powered off :
•
Confi guration of certain parameters: e.g. inputs/outputs, confi guration
of compressors, inverter parameters.
•
Installation of default parameters
•
Manual management
6.2 BLDC compressor
A maximum of 2 BLDC compressors can be managed using the Power+
inverter. The type of compressor is selected under Compressors
Æ
Confi guration (Cag01).
The BLDC compressor is managed via Modbus and works only if
connected to a CAREL power+ inverter. If there is no communication
with the inverter, the compressor will not be able to operate.
Below is the list of compressors that are currently available:
Medium and low temperature with PSD1 (R744)
Compressor HPV RPRV Inverter Capacity
E2VSTA0310 unipolar stator Tevap. = -10°C
TGC = 32°C
TOSHIBA DY30 E2V09CS1C0 E2V11CS1C0 PSD101021A 0.3 - 2.8 kW
TOSHIBA DY45 E2V11CS1C0 E2V14CS1C0 PSD1012200 0.5 - 4.2 kW
TOSHIBA DY67 E2V14CS1C0 E2V18CS1C0 PSD1016200 0.7 - 6.3 kW
TOSHIBA RY100 E2V18CS1C0 E2V24CS1C0 PSD1018400 1.0 - 8.8 kW
Tab. 6.a
Medium and low temperature with PSD2 (R744)
Compressor HPV RPRV Inverter Capacity
E2VSTA0310
unipolar stator
Tevap. = -10°C
TGC = 32°C
TOSHIBA DY30 E2V09CS1C0 E2V11CS1C0 PS200122041*0 0.3 - 2.8 kW
TOSHIBA DY45 E2V11CS1C0 E2V14CS1C0 PS200122041*0 0.5 - 4.2 kW
TOSHIBA DY67 E2V14CS1C0 E2V18CS1C0 PS200152041*0 0.7 - 6.3 kW
TOSHIBA RY100 E2V18CS1C0 E2V24CS1C0 PS200184041*0 1.0 - 8.8 kW
Tab. 6.b
* =0: no PEC version; * =1: PEC version
Note : go to ksa.carel.com to check the updated list of compressors
available, with reference to the “DC compressor availability table”
+050001835.
Manual confi guration
Hecu CO2 automatically downloads the optimised parameters for each
model of compressor at the end of the wizard procedure.
If the model of compressor is changed or the power+ is replaced, the new
system can be confi gured manually under
Compressors
Æ
Advanced
Æ
screen Cag01.
Hecu CO2 and power+ must be powered and connected via serial; the
address of power+ must be 1 (default).
The type of compressor is selected from the list of available compressors;
the number of motor poles and the correct model of power+ are defi ned
automatically.
Select YES for Set defaults and press ENTER.
If the model of power+ (as read by power+) is the same model or larger
than the power+ selected based on the type of BLDC compressor, the
default values can be written and Hecu CO2 can control the compressor.
Otherwise, the message "Not compatible" will be shown.
Envelope management
The envelope is the set of operating points in which a compressor can
operate safely for an indefi nite time. This can be represented graphically
by drawing the limits inside which the operating conditions must be
maintained. The fi gure shows the envelope for the Toshiba DY/RY series
compressors.
Suction
pressure
Discharge
pressure
Pd min
Ps min Ps max
Pd max
Fig. 6.b
The envelope limits consist of:
•
Minimum and maximum discharge pressure
•
Minimum and maximum suction pressure
•
Minimum and maximum compression ratio (CR)
•
Maximum current drawn by the compressor
The operating conditions are defi ned by:
•
Suction pressure
•
Discharge pressure
•
Discharge temperature
•
Rotation speed (rps)
The maximum discharge pressure can be limited due to construction
requirements of the circuit; in this case, a limit will be applied to the
maximum discharge temperature. The shape of the envelope can change
as compressor speed varies, and with this the operating conditions that
are considered safe for the compressor. It is therefore possible that a
certain pair of operating pressures is considered safe (inside the envelope)
at a certain speed, and unsafe (outside of envelope) at another speed.