An all-in-one electronic control that can combines temperature monitoring and alarming, door ajar alarm, entrapment alarm and leak detection into a single system.
The WIM Walk-in Cooler Monitoring System is designed to incorporate the control functions necessary to monitor safety conditions of a walk-in cooler and supermarket, convenience store, restaurant freezer into a compact, simple to install package.
The WIM is compliant with ASHRAE 15-2001 and the MECHANICAL CODE requirements for refrigerant gas monitoring.
The Control utilizes the latest microprocessor technology with two row, 16 character LCD back-lighted display. The English menu driven user interface is easy to understand and manipulate.
A single WIM performs the following independent monitoring and alarming functions:
• Door Ajar Alarming
• Entrapment Alarming
• Temperature Monitoring and Alarming
• Refrigerant Gas Leak Monitoring
The WIM can monitor the temperature in a single zone (room). The WIM will activate its audible visual alarm and the system alarm relays based on the following alarm conditions:
High Alarm : The room temperature must exceed the High Alarm Limit for a time period equal to or longer than the High Temp Alarm delay.
Low Alarm : The room temperature must be below the Low Alarm Limit for a time period equal to or longer than the Low Temp Alarm delay.
Either alarm can be enabled/disabled in the CONFIGURATION MENU.
Door Ajar Alarming
The WIM will activate its audible visual alarm and the system alarm relays if the monitored door is opened (Door Switch is closed) for more than the Door Open Alarm Delay time. When the door is opened, the display shows the duration of the door opening in hours and minutes. To monitor more than one door, connect all door switches in parallel. This alarm can be enabled/ disabled in the CONFIGURATION MENU.
The WIM will activate its audible visual alarm and the system alarm relays if a normally closed Entrapment Push Button is momentarily pushed to open. To monitor more than one Entrapment Push Buttons, connect all the buttons in series. This alarm is always active. To disable this alarm, short the two input connectors together with a bare copper wire.
Refrigeration Leak Monitoring
The WIM makes any refrigerated room Uniform Mechanical Code Compliant with the addition of a Sherlock Refrigerant Sensor. The WIM will activate alarms based upon two alarm levels. At the first alarm level, the WIM will activate its audible visual alarm and the Refrigerant Leak Level One Alarm Relays, activating any alarm notification system connected to the WIM. At the second alarm level, the WIM will activate its audible visual alarm and the Refrigerant Leak Level Two Alarm relays, activating additional alarm indication equipment and any additional safety procedures as required by local codes.
Gas Leak Sensors
The Sherlock Refrigerant Gas Sensor acts as an analog signal generator when connected to the Control via a discrete, three conductor cable. The sensor can be mounted up to 800 feet (longer run with special thick copper cable) away in locations where leaked refrigerant is likely to concentrate.
The gas sensors are available in three varieties:
• Ceramic Metal Oxide Semiconductor (CMOS) or Solid State Sensor
• Non-Dispersive, Pyro-Electric Infrared Sensor.
Door/Temp Monitoring Model - Single Zone WIM / WIM-4
Door/Temp/Refrigerant Leak Detection Model - Single Zone WIM-L / WIM-L-4
Door/Temp Monitoring Model with Remote Communications - Single Zone WIM-C / WIM-C-4
Door/Temp/Refrigerant Leak Detection Model with Remote Communications - Single Zone WIM-L-C / WIM-L-C-4