The STI STI-7511A-HTR is a heated polycarbonate enclosure with exterior thumb lock and enclosed deep back box. First, the installer mounts the deep back box on the wall. Then the heated, hinged cover locks with the exterior thumb lock. As a result, the STI-7511A-HTR keeps a protected device above its low-temperature limit even in cold-room or outdoor installations.
What the STI STI-7511A-HTR is built for
Many wall-mounted devices fail below freezing. However, an unheated enclosure offers no thermal margin. Therefore, the STI-7511A-HTR adds an integrated heater with three thermostats: control, over-temperature safety, and low-temperature warning.
Verified STI STI-7511A-HTR specifications
- Type: Heated polycarbonate enclosure with enclosed deep back box and exterior thumb lock
- Heater thermostats: Control thermostat, over-temperature safety thermostat, low-temperature warning (N/O contact for connection to a supervisory panel)
- Transformer: 16.5 VAC, 40 VA Class 2 auto-resetting transformer (included)
- Operating voltages: 12 V, 16.5 V, or 24 V (multi-voltage)
- Indicators: LEDs for "POWER" and heat-cycle "ON"
- Lock: Exterior thumb lock
- Materials: Super-tough polycarbonate cover, UV-stabilized
- Flammability rating: 94V-2
- Polycarbonate working range: -40° to 250°F (-40° to 121°C)
- Dimensions: 5.59" H x 7.53" W x 4.04" D
- Included: Mounting hardware and gaskets
- Warranty: Three-year polycarbonate breakage warranty; one year on electromechanical and electronic components
When the STI STI-7511A-HTR is the right choice
Specifically, the STI-7511A-HTR fits cold-weather or refrigerated installations where a protected device needs thermal margin. For example, walk-in cooler annunciators or exterior keypads. In addition, the low-temperature warning contact lets a supervisory panel report cold-failure conditions.
Application context
The 16.5 VAC, 40 VA Class 2 transformer is included and powers the heater. Therefore, plan a transformer-feed circuit at the installation point. Also, wire the low-temperature warning N/O contact to a supervised supervisory input if remote alarming is required.
Need help selecting the right STI cover or enclosure for your installation? Our team supports thousands of commercial fire alarm jobs every year. Call us at 1-888-557-0558 or email sales@lifesafetycom.com for application guidance, lead-time updates, or volume pricing.
Additional information
| Weight | 5.5 lbs |
|---|---|
| Dimensions | 10 × 10 × 7 in |
| Condition | New |
| Manufacturers | STI |
| Part Type | Replacement Part |
| Key Features | Search page, STI Global (Americas) Safety Technology InternationalCompareMy ListProductsFire Products, Alarms, Buttons &, Switches, Enclosures &, Covers, Wire Cages, Wireless Products, Build It Configurators |
| Dimensions | 1200×630. |
