COOL AIR INCORPORATED
Ammonia Leak Detector
Model LBW-420
The LBW-420 ammonia leak detector is an affordable,
dependable, and virtually maintenance-free detector manufactured by the leading
suppliers of ammonia refrigeration controls and systems.
All these standard features in one detector
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Displays ammonia concentration and
alarm status |
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Easy-to-program alarm set points |
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Solid-state, long-life sensor |
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4-20 mA analog output |
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Contacts for common industry alarm
systems |
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Contacts for operating auxiliary
equipment |
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Service mode for avoiding nuisance
alarms |
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Extra set of contacts for auxiliary
equipment |
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NEMA 4, UL-listed enclosure |
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Plus these available options
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Remote ammonia sensor with cable |
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High-low temperature sensor with cable and
programmable alarm set points |
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Back-up battery |
Typical Applications
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Industrial coolers and freezers |
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Compressor rooms |
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Control rooms |
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Loading docks |
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Storage tank areas |
Specifications
Ammonia Detection Sensitivity
High and Low Temperature Set Point Range
Display
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0.8”, 7-segment LED, 4-digit |
Controls
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Service mode switch |
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Enter, Up, and Down pushbuttons |
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Rotary selector switch Jumper |
Ammonia Sensor
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Metal oxide semiconductor |
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833 mW integral heater |
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Alumina ceramic base |
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100 mesh SUS 316 double gauge flame arrestor |
Relays
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Alarm, pre-alarm, and auxiliary (auxiliary relay
operates at same time as alarm relay) |
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5A, form C (SPDT), normally-open, normally-closed,
energized in normally-open state |
Outputs
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Contacts for: alarm, pre-alarm, and auxiliary relays,
and external temperature sensor |
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4-20 mA DC conforming to S50.01 ratings, Type 2L
and Type 2H |
Operating Temperature
Operating Humidity
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5% to 95% RH, non-condensing |
Power Requirements
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115/230 VAC, 50/60 Hz, or 24 VDC. Other power
supply options available. |
Dimensions
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9-1/2"H x 8"W x 4-1/2"D |
Weight
Enclosure
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NEMA 4 rated, UL listed |
Options
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High-low external temperature sensor with cable and
programmable alarm set points |
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Back-up battery |
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Remote ammonia sensor with cable |
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Stainless steel washdown tube |
Warranty
The LBW-420 comes with a 12-month warranty on workmanship from the time of
manufacture.
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Suggested Specification Text
Ammonia (NH3) Vapor Detector System
Provide ammonia leak detector(s), model LBW-420, as manufactured by Cool Air
Incorporated, St. Paul, Minnesota.
Ammonia leak detector(s) shall be wall-mounted and have a solid-state instrument
panel and sensor capable of sensing ammonia refrigerant concentrations of 25 to
800 parts per million, the adjustable range beginning at 25 parts per million.
Detector(s) shall not contain radioactive substances.
Detector(s) shall also have: an early warning system,
a front-panel digital readout providing ammonia concentration and temperature,
programmable alarm set points, a 4-20 mA analog output, contacts for operating
auxiliary equipment, and a service mode for avoiding nuisance alarms.
Detector(s) shall be capable of initiating a supervised alarm, resulting in
corrective action.
Optional high-low temperature sensor, back-up battery, and remote ammonia sensor
shall be available from the detector manufacturer.
115/230 VAC, 50/60 Hz, or 24 VDC power shall be provided for each detector.
Other power supply options available. |
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Features
The LBW-420 ammonia leak detector from Cool Air Incorporated
has all the features you need to protect your personnel and product. It has
a solid-state, long-life ammonia sensor that provides fast and accurate detection
of ammonia. In addition to the main alarm system, an early warning system
gives you time to react before ammonia levels reach full-alarm status.
The front panel display indicates ammonia concentration in
parts per million and temperature in degrees Fahrenheit (with a temperature sensor
installed). Front panel LEDs give you a quick indication of alarm status. The
detector has a 4-20 mA analog output for seamless integration with your existing
factory systems. It also comes equipped with contacts for communicating with common
industry alarm systems. Additional contacts
allow the detector to operate auxiliary equipment such as exhaust fans, king valves,
compressors, and additional alarm systems.
To reduce nuisance alarms, the LBW-420 has a service mode
that temporarily disables the detector’s relays during service and testing.
And to further enhance the value of this detector, Cool Air Incorporated offers
these beneficial options: a temperature sensor and alarm relay with programmable
set points, a remote ammonia sensor, and a back-up battery to keep your detector
operating during power failures—all options you would expect from the refrigeration
equipment experts!
The LBW-420 detector is housed in a NEMA 4, UL-listed enclosure,
and comes with Cool Air Incorporated’s standard 12-month warranty. |
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