Carel Hecu CO2 - Hecu CO2 System General Connection Diagram

15
ENG
Hecu CO
2
+0300085EN rel. 2.2 - 07.05.2019
2.8 General connection diagram
PAY ATTENTION
TO THE POWER SUPPLY!
LN
Fan 1
pGDe Terminal pLD PRO
HPV valve
boss
Analog Input
B1
B2
B3
B4
B5
B9
B10
Power supply
Analog Output (0-10V)
Digital Input (free voltage)
RS485 serial card
to connect
supervisory system
Discharge temp. probe (CAREL NTC-HT)
Gas cooler temp. probe (CAREL NTC)
Suction temp. probe (CAREL NTC)
Digital Output
(POWERED)
Digital Output
(NOT POWERED)
RPRV valve
Suction press. probe (*)
White
Black
Green
Gas cooler press. probe
(*)
Discharge only LT probe (*)
Black
Receiver probe (MT)
(*)
Parallel suct. probe (LT) (*)
0...10 Vdc Fan
White
Black
Green
Black
Green
White
Green
White
L
N
J1
J9
J11
J12
J14
J16
J17
J18
J19
J20
J21
J22
J23
J24
J10
J13
J2
J3
J4
J5
J6
J8
J7
HECU conguration
ON
1
2
OFF
DIP1=ON
DIP2=OFF
G
G0
Out2
C2
Out3
C2
Out4
C2
Out5
C2
C2
V-IN
N06
C6
N07
C7
N08
C8
U8
U9
U10
+Vdc
+5VR
GND
RX-/TX-
RX+/TX+
GND
RX-/TX-
RX+/TX+
GND
Vout
RX-/TX-
RX+/TX+
GND
N01
NC1
C1
U4
U5
+Vdc
+5VR
GND
U6
U7
+Vdc
+5VR
GND
DI1
DI2
DI3
DI4
GND
U1
U2
U3
GND
GND
(A01) Y1
(A02) Y2
(A03) Y3
- for ECU70*: 230 Vac 50/60 Hz, +10%/-15%;
- for ECU80*: 24 Vac +10%/-15% 50/60 Hz,
28 to 36 Vdc +10%/-15%;
to power+, MPXPRO, Ultracella
to HECU controller
L
N
Fuse or
High press
switch
MCB
UVW
L
PE
K
N
-DC
+DC
34 5 67
PTC
Klixon
Inverter 12A
Inverter 10A (PSD1)
Inverter 15A (1 PH)
Inverter 12/16A (PSD1)
Inverter 18/24A (3 PH)
L2/N L3 U V W
L1/L
PTC Klixon
M
3
M
3
Fuse or
HP switch
MCB
L
K
N
PE
GND STO
+
-
GND STO
+
-
Fig. 2.k
(*) The 4-20 mA pressure probes must be connected with the white to Ux and the black to + Vdc, green is not used
(**) 230 Vac SSR output, maximum switchable power 15 VA
Important: If the PEC version inverters (with class B software structure) are not used, the thermal protection devices for overload and high pressure
must act directly on the compressor actuator, and must therefore be wired in series with the compressor contactor coil control. For the types of cable to be
used, see the power+ manual ( +0300094EN).
I/O selection tables (example for MT unit)
Analogue inputs Digital inputs Analogue outputs Digital outputs
Suction temperature High pressure alarm Modulating fans Fan 1
Discharge temperature Low pressure alarm Fan 2
Outside temperature BLDC compressor alarm Equalising solenoid valve
Gas cooler outlet temperature Fan alarm
Suction pressure Remote ON-OFF
Gas cooler pressure
Receiver pressure