Emerson EC1-233 Operating Instructions

Note: This document contains short form instructions for experienced users.
Use last column in List of Parameters to document your individual settings.
The EC1-233 is a dedicated refrigeration controller which controls air temperature
and manages defrost and fan(s).
2
2
The ECN-Sxx air temperature sensor S1(7) is used for measuring the air
temperature and may be installed to measure either the air-in or air-out temperature
of the evaporator to feed a signal to the controller for controlling the thermostat
function. A relay output is used to control the refrigerant flow to the Thermo-
Expansion Valve by switching a solenoid valve (2) and / or the compressor. An
ECN-Sxx sensor S5 (9) is used for defrost termination and may be installed in
either the air outlet duct or inserted into the evaporator coil. The controller has
relay outputs to control the solenoid valve / compressor (2), defrost heater (3) and
evaporator fan (4). Please consult the technical data (right) for input and output
ratings. Refer to the parameter list on page 3.
!

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. Maximum
•
current permitted through the common live terminal (pin1) is 15Amps.
Mains voltage; Caution should be made when removing the electrical cover
•
against electrical shock
Disconnect all voltages from system before installation.
•
Keep temperatures within nominal limits.
•
Comply with local electrical regulations when wiring
•

Technical Data

Power supply
Power consumption 3VA max.
Communication n/a
Connector size Fixed screw terminals
wire size 0.14 ... 1.5 mm
Temperature
storage -20 ... +65°C
operating
Humidity 0...80% r.h. non condensing
Protection class IP65 (front protection with gasket)
Output relays (3) SPST contacts, AgCdO, sealed
Inductive (AC15) 250V/2A
Resistive (AC1) 250V/8A;
! Max. current 15A total supply current on pin1
EC1-233_65150_EN_R02.doc
EC1-233 Display Case and Coldroom Controller
7 9
4
S5
3
S1
EC1_Blockdiagr.cdr
230VAC ±10%; 50/60 Hz; Class II
2
0 ... +60°C
Replacement for R01
Operating Instructions

Mounting

The EC1-233 can be mounted into a panel with a 71 x 29 mm cutout. See
dimensional drawing below for space requirements including rear cable protector.
Remove cable protector and mounting clips. (Move clip away from front side while
pushing at point P see dimensional drawing below).
Push controller into panel cutout (1) ensuring the gasket is positioned on the outer
surface.
Place the mounting clip onto the controller ensuring the spring is nearest the panel.
Push each clip forward until the controller is firmly held in place. The spring on the
clip should be compressed and the gasket firmly secured to prevent dust and
moisture ingress.

Electrical Installation

Connect wires to terminals as per diagram below and replace cable protector at rear
side. Refer to the electrical wiring diagram (below) for electrical connections. A
copy of this diagram is mounted on the controller. Use connection wires/cables
suitable for 90°C operation (EN 60730-1)
EC1 analog inputs are for dedicated sensors only and should not be connected to
any other devices. The controller has an internally mounted transformer allowing a
"mains" 230V 50/60Hz power supplier to be connected directly.
Important: Keep controller and sensor wiring well separated from mains wiring.
Minimum recommended distance 30mm.

Recommended Sensor Positions in Detail:

(7) ECN-Sxx air-in temperature sensor, S1: Position centrally below the air inlet
grille. In applications where the average ambient temperature is above 25°C, it may
be advisable to mount the air sensor in the lower air discharge duct (air-out of the
evaporator).
The air temperature sensor should be mounted on spacers in the air duct so that
there is airflow around it and it is not in contact with any surface material which
could produce a false temperature reading.
(9) ECN-Sxx defrost temperature sensor, S5: Position in the evaporator,
asymmetric closer to the expansion valve or in the air-outlet duct immediately after
the evaporator (only if S1 is mounted in the air-in duct).
Caution: The sensor cables can be extended if necessary. The connection must be
protected against water and dust.

Setup and Parameter Modification Using the Keypad

The parameters can be accessed via the 4-button keypad or may be more efficiently
programmed using a copy key. Refer to further details below. The parameters are
arranged in two sections; user and administration allowing two levels of access.
Security lock for parameter modification:
Press the and
controller parameters. "On" (unlocked) / "OF
screen respectively. When locked, the parameters may be visualized but cannot be
modified.
User parameters:
• Press the Prg button for more than 3 seconds. When active, the "prg" LED will
be illuminated and the first parameter "St" will be displayed.
To modify parameters see Parameters modification below.
Administration parameters:
• Press the Prg simultaneously with the
active, the "prg" LED will be illuminated and the first parameter "St" will be
displayed.
To modify parameters see Parameters modification below.
• When parameter programming has been completed, press the Prg button to revert
back to operation mode. The Prg LED will be turned off.
1 / 2
buttons simultaneously for 10 seconds to unlock/lock the
" (locked) will be displayed on the
F
button for more than 10 seconds. When
Part No. 864 908
GB
07.07.2008