Carel EVD Evolution Twin User Manual Download Page 16

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ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

4. COMMISSIONING

Important:

if the refrigerant is not available among the refrigerant

parameter options, contact CAREL service to:

confirm that the system: pCO cont CAREL electronic expansion
valve is compatible with the desired refrigerant (custom);

identify the values that define the custom refrigerant: “Dew a…f high/
low” and “Bubble a…f high/low”. See the parameter table.

4.1 Commissioning

Once the electrical connections have been completed (see the chapter
on installation) and the power supply has been connected, the operations
required for commissioning the controller depend on the type of interface
used, however essentially involve setting just 4 parameters: refrigerant, valve,
type of pressure probe (S1 for driver A and S3 for driver B) and type of main
control. The network address for EVD evolution twin is single.
Types of interfaces:

•

DISPLAY

: after having correctly configured the setup parameters,

confirmation will be requested. Only after confirmation will the controller
be enabled for operation, the main screen will be shown on the display and
control will be able to commence when requested by the pCO controller
via LAN or when digital input DI1 closes for driver A and DI2 for driver B.
See paragraph 4.2;

•

VPM

: to enable control of the drivers via VPM, set “Enable EVD

control” to 1; this is included in the safety parameters, in the special
parameters menu, under the corresponding access level. However,
the setup parameters should first be set in the related menu.
The drivers will then be enabled for operation and control will be able to
commence when requested by the pCO controller via LAN or when digital
input DI1/DI2 closes. If due to error or for any other reason “Enable EVD
control” should be set to 0 (zero), the controller will immediately stop
control and will remain in standby until re-enabled, with the valve stopped
in the last position;

•

SUPERVISOR

: to simplify the commissioning of a considerable number of

controllers using the supervisor, the setup operation on the display can
be limited to simply setting the network address. The display will then
be able to be removed and the configuration procedure postponed to a
later stage using the supervisor or, if necessary, reconnecting the display.
To enable control of the controller via supervisor, set “Enable EVD control”;
this is included in the safety parameters, in the special parameters menu,
under the corresponding access level. However, the setup parameters
should first be set in the related menu. The controller will then be enabled
for operation and control will be able to commence when requested by
the pCO controller via pLAN or when digital input DI1 closes for driver A
and DI2 for driver B. As highlighted on the supervisor, inside of the yellow
information field relating to the “Enable EVD control” parameter, if due to
error or for any other reason “Enable EVD control” should be set to 0 (zero),
the controller will immediately stop control and will remain in standby until
re-enabled, with the valve stopped in the last position;

•

pCO PROGRAMMABLE CONTROLLER

: the first operation to be

performed, if necessary, is to set the network address using the display.

Important:

for the driver with pLAN serial port, see the

guidelines described in the following paragraph for setting the address.

If a pLAN, tLAN or RS485/Modbus® controller is used, connected to a
pCO family controller, the setup parameters will not need to be set and
confirmed. In fact, the application running on the pCO will manage the
correct values based on the unit controlled. Consequently, simply set the
pLAN, tLAN or RS485/Modbus® address for the controller as required by
the application on the pCO, and after a few seconds communication will
commence between the two instruments and the controller automatically
be enabled for control. The main screen will shown on the display, which
can then be removed, and control will be commence when requested
by the pCO controller or digital input DI1 for driver A and DI2 for driver B.
(see paragraph 6.3). If there is no communication between the pCO and
the controller (see the paragraph “LAN error alarm”), this will be able to
continue control based on the status of the digital inputs.

4.2 Setting the pLAN network address

The pLAN addresses of the devices in the network must be assigned according
to the following rule:

the EVD Evolution driver addresses must be assigned in increasing order
from left to right, starting with the controllers (A),

then the drivers (B) and finally

the terminals (C).

VBA

V connection

Power Supply

Relay

NO 1

COM 1

GND