EC3-932_65149_EN_R02.doc Replacement for R01
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PCN: 865 874 22.09.2009
EC3-932 Rack and Condenser Controller and ECD-000 Display Unit
Operating Instructions
GB
Note: This document contains short form instructions for experienced users.
Use last column in List of Parameters to document your individual settlings.
More detailed information can be found in the User Manual.
The
EC3-932
is a digital controller for racks and condensers in commercial
refrigeration applications for controlling up to 4 compressors with conventional
on/off step control working on a common suction line. Alternatively, the controller
may be configured to control a Copeland Digital Scroll compressor and up to 3
single stage compressors. The condenser control may consist of up to 3 cycled
fans. The first fan can be continuously speed controlled directly with the onboard
TRIAC. The fan power supply must be connected to the TRIAC. To meet the EMC
compliancy in this case, an external filter must be fitted. For the rack controller, the
control target is to maintain the suction pressure (3) at a defined value by varying
the available compressor capacity (12).
The control target for the condenser controller is to maintain the condensing
pressure (4) at a defined value by varying the available fans (13). For the
measurement of the suction pressure and the condensing pressure, two PT pressure
sensors with a 4 – 20 mA interface can be connected to the controller. The
controller has four relays outputs to command the compressors (12), the fans (13)
and the heat recovery solenoid (15). Eight digital inputs for 24V AC/DC or 230V
AC and four digital inputs for 24V AC/DC are available, four for compressor serial
alarm (5), three for the fan serial alarm (10), one for low pressure alarm (6), one for
high pressure alarm (7), one for oil level alarm (8), one for refrigerant level alarm
(9) and one for heat recovery demand (11). To control the discharge end
temperature of compressors, four temperature inputs (1) are available. If a Digital
Scroll is installed (16) it should be connected to relay “comp 1” and the
corresponding temp. sensor to “disch 1”. Alternatively, two analogue outputs
0 to 10 V are available to control the first compressor or the first fan are inverter
driven (14).
The optional
ECD-000
Display Unit can be connected to the EC3-932 for local
display of control parameters and for controller setup without the use of a PC.
Because the EC3-932 is fully functional without display unit the ECD-000 may be
removed at any time.
!
Safety instructions:
•
Read installation instructions thoroughly. Failure to comply can result in
device failure, system damage or personal injury.
•
The product is intended for use by persons having the appropriate
knowledge and skills.
•
Ensure electrical ratings per technical data are not exceeded.
•
Disconnect all voltages from system before installation.
•
Keep temperatures within nominal limits.
•
Comply with local electrical regulations when wiring
Technical Data
EC3 Series Controller
Power supply
24VAC ±10%; 0,5A; 50/60Hz; Class II
6.3mm spade earth connector
Power consumption
20VA max.
Communication TCP/IP
Ethernet
10MBit/s
Plug-in connector size
Removable screw terminals
wire size 0.14 … 1.5 mm
2
Temperature storage
operating
-20 … +65°C
0 … +60°C
Humidity
0…80% r.h. non condensing
Protection class
IP20
Pressure transmitter inputs
24VDC, 4...20mA
Temp. ambient (2)
Temp 1: for Digital Scroll
(Dynamic based on settings)
NTC 10 k
Ω
@ 25°C, -50 … +50°C
NTC 86 k
Ω
@ 25°C -40 to +180°C
Applies if C4= 2 & F5= 2
Temp. 2, 3&4 input discharge
1 M
Ω
@ 25°C, +50 … +150°C
Digital Inputs
24VAC/DC or 230VAC
Compressor output relays
Inductive (AC15) 250V/2A
(4x) + General alarm output
Resistive (AC1) 250V/8A
Digital scroll output
!
Semi-conductor switch, 24 … 230 VAC
The coil must be rated for the voltage applied
to the input
ECD-000 Display Unit
Power Supply
from EC3 via connecting cable
Display
2½-digit red LED with decimal point
reversible between °C and °F
LED indicators
Controller 1, Controller 2, p bar, Alarm, IR status
Temp & Humidity
Identical to EC3 specifications above
Protection class
IP65 (front protection with gasket)
Connecting cable
ECC-N10 (1m), ECC-N30 (3m), ECC-N50 (5m) or
CAT5 cable with RJ45 connectors
Marking EC3/ECD:
Mounting
The EC3 can be mounted onto a standard DIN rail.
The ECD-000 can be mounted in panels
with a 71x29 mm cutout. See dimensional
drawing below for space requirements
including rear connectors.
Push controller into panel cutout. (1)
Make sure that mounting lugs are flush with
outside of controller housing
Insert allen key into front panel holes and
turn clockwise. Mounting lugs will turn and
gradually move towards panel (2)
Turn allen key until mounting lug barely
touches panel. Then move other mounting
lug to the same position (3)
Tighten both sides very carefully until
display is secured. Do not over tighten as
mounting lugs will break easily.
