Checks After Commissioning; Other Functions - Carel EVD evolution User Manual

Main regulation
Setting the main control defi nes the operating mode of the driver.
Parameter/description
CONFIGURATION
Main control
Superheat control
1= multiplexed cabinet/cold room
2= cabinet/cold room with on-board compressor
3= "perturbed" cabinet/cold room
4= cabinet/cold room with subcritical
5= R404A condenser for subcritical
6= air-conditioner/chiller with plate heat exchanger
7= air-conditioner/chiller with tube bundle heat exchanger
8= air-conditioner/chiller with fi nned coil heat exchanger
9= air-conditioner/chiller with variable cooling capacity
10= "perturbed" air-conditioner/chiller
Advanced control
11= EPR back pressure
12= hot gas bypass by pressure
13= hot gas bypass by temperature
CO
14= transcritical tgas cooler
2
15= analogue positioner (4 to 20 mA)
16= analogue positioner (0 to 10 V)
17= air-conditioner/chiller or cabinet/cold room with
adaptive control
18= air-conditioner/chiller with digital scroll compressor
19= AC/chiller with SIAM ANB scroll compressor(*)
20= superheat regulation with 2 temperature probes
21= I/O expander for pCO
(*) CAREL valve drivers only
The superheat set point and all the parameters corresponding to PID
control, the operation of the protectors and the meaning and use of
probes S1 and/or S2 will be automatically set to the values recommended
by CAREL based on the selected application.
During this initial confi guration phase, only superheat control mode
from 1 to 10 can be set, which diff er based on the application (chiller,
refrigerated cabinet, etc.).
In the event of errors in the initial confi guration, these parameters can
later be accessed and modifi ed inside the service or manufacturer menu.
If the driver default parameters are restored (RESET procedure, see the
chapter on Installation), when next started the display will again show
the guided commissioning procedure.

4.3 Checks after commissioning

After commissioning:
•
check that the valve completes a full closing cycle to perform
alignment;
•
set, if necessary, in Service or Manufacturer programming mode, the
superheat set point (otherwise keep the value recommended by
CAREL based on the application) and the protection thresholds (LOP,
MOP, etc.). See the chapter on Protectors.

4.4 Other functions

By entering Service programming mode, other types of main control
can be selected (transcritical CO
called advanced control functions, which do not involve the superheat,
activating auxiliary controls that use probes S3 and/or S4 and setting the
suitable values for the control set point and the LowSH, LOP and MOP
protection thresholds (see the chapter on "Protectors"), which depend on
the specifi c characteristics of the unit controlled.
By entering Manufacturer programming mode, fi nally, the operation of
the driver can be completely customised, setting the function of each
parameter. If the parameters corresponding to PID control are modifi ed,
the driver will detect the modifi cation and indicate the main control as
"Customised".
Def.
multiplexed
cabinet/cold
room
CO
2
CO
2
Tab. 4.h
, hot gas bypass, etc.), as well as so-
2
"EVD evolution" +0300005EN - rel. 3.1 - 25.07.2011
17
ENG