12
ENG
“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018
4. COMMISSIONING
Important:
if the refrigerant is not available among the refrigerant
parameter options, contact CAREL service to:
1.
confirm that the system: (c.pCO/Ultracella,...)+ EVD ice + CAREL electronic
expansion valve is compatible with the desired refrigerant (Gas
type=custom);
2.
identify the values that define the custom refrigerant and enter them for
parameters: “Dew a…f high/low” . See the variables accessible via
serial connection.
4.1 Commissioning procedure
Once the electrical connections have been completed (see the chapter
“Installation”) and the power supply has been connected, the operations
required for commissioning the driver depend on the type of interface
used, however essentially involve setting just 3 parameters: refrigerant,
functioning mode
, superheat setpoint.
Important:
•
until the commissioning procedure has been completed, control
will not be active;
•
(only during commissioning) changing the gas involves changing
the value of the ratiometric probe parameter.
After powering up the driver, the display lights and the driver waits the
control parameters, indicated by the hyphens. The default parameters
are:
1.
Refrigerant = R404A;
2.
Type of control = multiplexed showcase/cold room
3.
Superheat set point = 11 K.
Procedure:
GAS Type
Mode
Super Heat
1.
The controller displays the bar at the top: refrigerant (GAS Type);
GAS Type
Mode
Super Heat
2.
Press PRG/Set: the refrigerant setting is shown = 3: R404A
GAS Type
Mode
Super Heat
3.
Press UP/Down to change the value
GAS Type
Mode
Super Heat
4.
Press PRG/Set to save and return to the refrigerant parameter code
(bar at the top)
GAS Type
Mode
Super Heat
5.
Press Down to move to the next parameter: Mode, indicated by the
bar in the middle;
6.
Repeat steps 2,3,4,5, to set the values of the other parameters: Mode,
Superheat set point;
GAS Type
Mode
Super Heat
7.
Press PRG/Set for 2 seconds to exit the commissioning procedure
and start control. The standard display is shown.
4.2 Parameters first configuration
Important:
ONLY DURING commissioning, changing the gas
involves changing the value of the ratiometric probe parameter; if not
specified in the table, the type of ratiometric probe is -1...9.3 barg.
Parameter/ description
Def.
Gas Type = refrigerant
0 Custom
1 R22
15 R422D
28 R1234ze(-1...4.2 barg)
2 R134a
16 R413A
29 R455A (-1...12.8 barg)
3 R404A
17 R422A
30 R170 (0...17.3 barg)
4 R407C
18 R423A
31 R442A (-1...12.8 barg)
5 R410A
19 R407A
32 R447A (-1...12.8 barg)
6 R507A
20 R427A
33 R448A
7 R290
21 R245FA
34 R449A
8 R600(-1...4.2 barg)
22 R407F
35 R450A (-1...4.2 barg)
9 R600a (-1...4.2 barg) 23 R32 (0...17.3 barg) 36 R452A (-1...12.8 barg)
10 R717
24 HTR01
37 R508B (-1...4.2 barg)
11 R744 (0...45 barg)
25 HTR02
38 R452B
12 R728
26 R23
39 R513A (-1...4.2 barg)
13 R1270
27 R1234yf
40 R454B
14 R417A
41 R458A
3 =
R404A
Tab. 4.a
Note:
if the refrigerant is not available among the refrigerant
options, “GAS Type=refrigerant”:
1.
set any refrigerant (for example R404);
2.
select the type of operating mode (Mode), the superheat set point
and complete the commissioning procedure;
3.
use the VPM program (Visual Parameter Manager, see the chapter
“Network connection” ) and set the refrigerant type “0= Custom” and
the parameters “Dew a...f high/low” which define the refrigerant (see
variables accessible via serial connection);
4.
start control, for example by closing the digital input contact to
enable operation.
Mode = operating mode
1 Multiplexed cabinet/cold room
2 Air-conditioner/chiller with plate heat exchanger
3 Air-conditioner/chiller with tube bundle heat exchanger
4 Air-conditioner/chiller with finned coil heat exchanger
5 Reserved
6 Reserved
7 Cabinet/cold room with subcritical (R744) CO2
1 = Mul-
tiplexed
cabinet/
cold room
Superheat setpoint
11 K(20°F)
Tab. 4.b
Note:
consider the unit of measure (°C/°F) when setting the
superheat setpoint (Si parameter).