Emerson EC2-311 User's Manual
EC2-311_65081_EN_R08.doc
Replacement for Rev.:06
1 / 4
PCN: 864 911 20.03.2008
EC2-311 Display Case and Coldroom Controller
Operating Instructions
GB
Note: This document contains short form instructions for experienced users.
Use last column in List of Parameters to document your individual settings.
More detailed information can be found in the User Manual.
The EC2-311 is a dedicated refrigeration controller with superheat control and a
driver for an Alco Controls Electric Control Valve EX2. In addition the EC2-311
controls air temperature and manages defrost and fan(s).
Network
1
2
3
4
5
6
7
9
8
Two ECN-Pxx pipe temperature sensors (1) and (2) measure saturated suction gas
temperatures at the evaporator inlet and outlet and feed the signals into the
superheat control loop. The superheat controller output modulates the opening of
the EX2 pulse width modulated Electrical Control Valve (6) thus optimising the
refrigerant mass flow through the evaporator. The ECN-Sxx air temperature
sensors (3) and (4) measure air-in and air-out temperature of the evaporator and
feed signals into the air temperature thermostat. The ECN-Fxx fin sensor (5) is
used for defrost termination. The controller has 3 relay outputs to control the
compressor (7), defrost heater (9) and evaporator fan (8). Please consult the
technical data (right) for input and output ratings.
In case of power loss, due to the positive shut-off characteristics of the EX2
Electrical Control Valves, a liquid line solenoid valve is not needed to prevent
flooding of the compressor.
! 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
EC2 Series Controller
Power supply
24VAC ±10%; 50/60 Hz; Class II
Power consumption
20VA max including EX2.
Communication LonWorks®
Interface, FTT10, RJ45 connector
Plug-in connector size
Removable screw terminals
wire size 0.14 … 1.5mm2
Temperature
storage
operating
-20 … +65°C
0 … +60°C
Humidity
0…80% r.h. non condensing
Protection class
IP65 (front protection with gasket)
Output relays (3)
SPDT contacts, AgCdO
Inductive
(AC15)
250V/2A
Resistive (AC1) 250V/8A; 12A total return current
Triac output for EX2
Electrical Control Valve
Coil (ASC 24V only)
24VAC, 0.1 … 1A
Marking
Mounting
The EC2-311 can be mounted in panels with a 71 x
29 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 controller is
secured. Do not over tighten as mounting lugs will
break easily.
Electrical Installation
Refer to the electrical wiring diagram (below) for electrical connections. A copy of
this diagram is labeled on the controller. Use connection wires/cables suitable for
90°C operation (EN 60730-1)
EC2 analog inputs are for dedicated sensors only and should not be connected to
any other devices. Connecting any EC2 inputs to mains voltage will permanently
damage the EC2.
Important: Keep controller and sensor wiring well separated from mains wiring.
Minimum recommended distance 30mm.
Warning: Use a class II category transformer for 24VAC power supply
(EN 61558). Do not ground the 24VAC lines. We recommend to use one
transformer per EC2 controller and to use separate transformers for 3rd party
controllers, to avoid possible interference or grounding problems in the power
supply. Connecting any EC2 inputs to mains voltage will permanently damage the
EC2.
Related Manuals for Emerson EC2-311
-
Honeywell Thermostats RTH2310B Owner's Manual
44 pages
-
Honeywell Thermostats TH3110D1008 Owner's Manual
16 pages
-
Honeywell Thermostats TH4110D1007 Owner's Manual
24 pages
-
Honeywell Thermostats TH6110D1005 Owner's Manual
24 pages
-
Hunter Thermostats 42999B Owner's Manual
2 pages
-
Hunter Thermostats 43054 Owner's Manual
2 pages
-
Hunter Thermostats 44100A Owner's Manual
33 pages
-
Hunter Thermostats 44100B Owner's Manual
2 pages
-
Hunter Thermostats 44155C Owner's Manual
52 pages
-
Trane Thermostats X1379088401 Owner's Manual
32 pages
-
Honeywell Thermostats T8112D Owner's Manual
8 pages
-
NOMA Thermostats THM301M User's Manual
8 pages
-
Trane Thermostats TCONT802AS32DA Instruction Manual
20 pages
-
Hunter Thermostats Thermostat 44360 User's Manual
23 pages
-
Honeywell Thermostats TH6220D1028 Owner's Manual
24 pages
-
Honeywell Thermostats TH5220D1003 Owner's Manual
20 pages
-
Honeywell Thermostats TH8321WF1001 Installation Guide
12 pages
-
Honeywell Thermostats RTHL3550D Quick Installation Guide
64 pages
-
Honeywell Thermostats RTH6580WF User's Guide
140 pages
-
Honeywell Thermostats RTH221B1039 Operating Manual
48 pages
-
Honeywell Thermostats RTH2300B1038 Operating Manual
48 pages
-
Honeywell Thermostats RTH2300B1038 Quick Installation Guide
56 pages
-
Honeywell Thermostats RTH111B1024 Quick Installation Guide
48 pages
-
Honeywell Thermostats FocusPRO 6000 Series User Manual
24 pages