Features
The WIM2 Walk-in Cooler Monitoring System - Two
Zone
is designed to incorporate most of the control
functions necessary to monitor safety conditions of a walk-in cooler and freezer of a
supermarket, convenience store or restaurant into a
compact, simple to install package.
The WIM2 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 WIM2 performs the following independent
monitoring and alarming functions for two separate
walk-in coolers:
•
Door Ajar Alarming
•
Entrapment Alarming
•
Temperature Monitoring and Alarming
•
Refrigerant Gas Leak Monitoring
Temperature Alarming
The WIM2 can monitor the temperature in a
two zones (rooms). The WIM2 will activate its audible
visual alarm and the System Alarm Relays based upon 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 WIM2 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.
Entrapment Alarming
The WIM2 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 WIM2 makes any refrigerated room
Uniform Mechanical Code Compliant with the addition of a
Sherlock Refrigerant Sensor. The WIM2 will activate
alarms based upon two alarm levels. At the first alarm
level, the WIM2 will activate its audible visual alarm
and the Refrigerant Leak Level One Alarm Relays,
activating any alarm notification system connected to
the WIM2. At the second alarm level, the WIM2 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 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.
•
Electrochemical
Models
Door/Temp Monitoring Model - Two
Zone WIM2 / WIM2-4
Door/Temp/Refrigerant Leak Detection Model -
Two Zone WIM2-L / WIM2-L-4
Door/Temp Monitoring
Model with Remote Communications - Two Zone WIM2-C
/ WIM2-C-4
Door/Temp/Refrigerant Leak Detection Model with Remote
Communications -
Two Zone WIM2-L-C / WIM2-L-C-4
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