WURM CRA Manual

1 CRA
Cold location controller for installation in refrigeration units which are ready to plug in
1.1 Front view
Fig. 1: Front view
1.2 Features
• Suitable for plug-in refrigeration units
• Can be used with R290 refrigerant (propane,<150g)
• Connection for 3 temperature sensors (supply air, return air and limit sensor)
• Weighting of 2 control sensors
• Circulated air defrost, electric defrost and hot gas defrost
• Defrosting over cyclical intervals
• Run-down function of the fan control
• 3-point control, e.g. for heating function
• Input for door contact switch with adjustable timed interruption of cooling
• Quick installation
• Standard size for unit installation in insertion shaft
• Degree of protection IP65, on the front in the installation position
• Optional interface module for Modbus or CAN bus available
• Integrated power supply
Accessories
• Interface module for CAN bus (CRA-IFC) or Modbus (CRA-IFM) with built-in real-time clock with
back-up battery power reserve
Version and validity of the documentation
Version Date
V1.0.0 and 2024-10
higher
Any versions not listed are special solutions for individual projects and are not described in detail in this document.
This document will automatically become invalid when a new technical description is created.
Manufacturer: Wurm GmbH & Co. KG Elektronische Systeme, Morsbachtalstraße 30, D-42857 Remscheid
For further information, see our website at
CRA_V1.0.0_PI_2024-10_EN
Cold location controller for installation in refrigeration units which are ready to plug in
Documentation status
www.wurm.de
Subject to technical changes
CRA
1