COMPANY HEADER
Request Information
This protective cover has been helping stop false fire alarms around the world for more than 35 years, without restricting legitimate alarms. This Stopper II® enclosure with heater allows addressable dual monitor modules to be installed inside or outside in temperatures below UL Listing limits or in other NEMA 3R environments. UL/cUL Listing requires outdoor rated stations. The cover offers excellent protection against physical damage (both accidental and intentional), as well as other environments inside and outside. Also ideal for inside of walk-in freezers.
Unit of Measure

Specifications

Box Type

 N/A With 4 in. Deep Backbox - 240 V AC

Operating Temperature

 N/A -40 to 122 ºC-40 to 250 ºF

AC Voltage - Heater

 N/A 240 V

Heater Frequency

 N/A 50 Hz60 Hz

Polycarbonate Enclosure Specifications

Flammability Rating

 N/A UL94 V-2

Wall Thickness - Backbox

 N/A 0.20 in5.1 mm

Wall Thickness - Cover

 N/A 0.12 in3.1 mm

National Electrical Manufacturers Association (NEMA) Rating

 N/A 3R
Polycarbonate Enclosure Warranty1 N/A 1 y

Silicone Laminate Heater Specifications

Silicone Laminate Heater Warranty

 N/A 5 y

Silicone Laminate Heater Voltage

 N/A 240 V

Silicone Laminate Heater Frequency

 N/A 50/60 Hz

Note for Silicone Laminate Heater

 N/A UL Recognized Component

Silicone Laminate Heater Power

 N/A 100 W

Life at -10 to -70 Degree Celcius (ºC) (14 to 158 Degree Fahrenheit (ºF)) Temperature

 N/A 5 y

Fan Specifications

Fan Voltage - VDC (±10 %)

 N/A 24 V

Fan Power Rating

 N/A 90 mA

Fan Life

 N/A 5 y

Warning for Fan Usage

 N/A The polarity of the circulating fan is important as it only rotates in one direction with red lead being positive.

Note for Fan Specification

 N/A UL Recognized Component

Internal Dimensions

Overall Height

 N/A 6.25 in158 mm

Overall Width

 N/A 4.125 in104 mm

Overall Depth

 N/A 1.25 in31 mm

How It Works

How It Works

 N/A Stopper II® Heated Enclosure consists of a clear, super tough polycarbonate shield, frame and heater. The Stopper II® is mounted on a NEMA 3R enclosure with a Heater which allows an addressable manual pull station to be installed inside or outside in cold temperatures.

Approvals and Warranty

Warranty2 N/A 3 y

Testing

 N/A It has been tested and approved or listed by:
  • UL, cUL Listed S2466 (requires outdoor rated station)
  • UL File S7025 is cross referenced to File S2466 permitting STI Stopper® Stations, non fire, in category UEHX and Listed to UL 2017 for outdoor use
  • Americans with Disabilities Act (ADA) Compliant
  • UL Listed to U.S. and Canadian safety standards.
  • Enclosure rated to NEMA 3R Standards.

Key Features

General Information

 N/A
  • For use in areas where temperature or environmental conditions exceed the operational range of UL Listed devices.
  • Heater unit cycles as required to maintain the correct range of operating temperatures.
  • Fan runs continuously to maintain a uniform temperature inside the enclosure.
  • Maintains operating temperature with external temperatures to -70 ºF (-57 ºC).

Design

 N/A
  • The Stopper II® design is a registered trademark of Safety Technology International, Inc.

Construction

 N/A
  • The thick, clear polycarbonate cover is UV-stabilized against discoloration.

Installation

 N/A
  • UL/cUL Listing requires outdoor rated stations.
  • Typical working properties of polycarbonate are -40 º to 250 ºF (-40 º to 121 ºC).

Electronics

 N/A
  • UL Listing does not require standby or secondary power for 110 or 140 V AC 60 Hz heater.

Options

 N/A
  • 110 V AC or 240 V AC heater.

Accessories

Accessories

 N/A STI-HK3 - Replacement heater

Warning

Warning

 N/A The enclosure is used to protect UL Listed 38 and 2017 manual initiating outdoor listed devices at temperatures down to -70 ºF (-57 ºC). It is the installer's responsibility to comply with NEC 70 Articles 725 and 760, NFPA 72, and other applicable fire and electrical codes. Conduit or raceway paths need to be sealed as near to the enclosure as possible. Installer should have maintained supervision over the low temperature thermostat. The low temperature monitoring thermostat makes the circuit at +32 ºF (0 ºC) and clears the circuit at +50 ºF (+10 ºC). This listing requires that the fire alarm supervisory control module be only of the latching type. On the appliance mounting plate is a label where you should record the installation date. Also includes serial number and installation date on the instruction sheet for quick reference.
  • 1 Lifetime against breakage in normal use (one year on electronics from time of installation)
  • 2 Three year guarantee against breakage of polycarbonate in normal use (one year on electromechanical and electronic components).