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This document is subject to change without notice
IS_ER54 ER55_24-85737-1358 Rev. A
READ THIS INSTRUCTION SHEET AND THE SAFETY WARNINGS
CAREFULLY BEFORE INSTALLING AND SAVE IT FOR FUTURE USE
General Features
Devices are digital controllers for "static" or "ventilated" refrigeration units
working at positive or negative temperatures. They incorporate all the features
needed by modern units such as valve or compressor control, full management
of the evaporator fan, "off-cycle" or "active" defrost control, additional auxiliary
outputs for alarm reporting and light switching. They integrate Real Time Clock
for energy saving and scheduling of events such as defrost cycles. Controller
have also network communication capability to be integrated to Building
management systems.
Figure 1: ER54 Model Dimensions
(in mm)
Figure 2: ER55 Model Dimensions
(in mm)
Mounting
Figure 3: ER54 Mounting
Wiring Diagram
Figure 4: ER54 Wiring Diagram
(a). RS485 Cable
Figure 5: ER55 Wiring Diagram
(a). RS485 Cable
Display Diagrams
Figure 6: Menus Navigation
Figure 7: Function Keys
(Active only at home menu level):
Figure 8: Parameter Setting Example
Figure 9: Min/Max Temperature reset
Figure 10: Accessories
Ordering Codes
IMPORTANT:
• Use this controller only to control equipment under normal operating condi-
tions. Where failure or malfunction of the controller could lead to personal
injury or property damage to the controlled equipment or other property, addi-
tional precautions must be designed into the control system. Incorporate and
maintain other devices such as supervisory or alarm systems or safety or limit
controls that are intended to warn of, or protect against, failure or malfunction of
the controller.
• Do not installed or use this controller in or near environments where corrosive
substances or vapor could be present. Exposure of the controller to corrosive
environments may damage the internals components of the device, and will
void the warranty.
• Make all wiring connections in accordance with local, national and regional
regulations. Do not exceed the electrical ratings of the controller.
WARNING: Risk of Electric Shock
• Disconnect the power supply power before making electrical connec-
tions to avoid electric shock.
• Disconnect each of the multiple power supplies before making electrical con-
nections. More than one disconnect may be required to completely de-ener-
gize equipment. Contact with components carrying hazardous voltage can
cause electric shock and may result in sever personal injury or death.
WARNING: Property Damage
• Do not apply power to the system before checking all wiring connec-
tions. Short circuited or improperly connected wires may result in per-
manent damage to the equipment.
(a). Home
(b). Temperature
(c). Setpoint
(d). Configuration
(e). Clock
(f). Escape
* Automatic ESCAPE after 30 sec.
(a). Home
(b). Standby
(c). Light
(d). Defrost
(e). Alarm Mute/Reset
(a). Sensor
(b). Connectors
(c). Mounting clip
ER54-PMW-x01C*
Controller Panel mount, Quick connectors
ER55-DR230-x01C*
Controller Din Rail, Quick connectors
* x = 0: N2Open / x = 5: Modbus
