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Ursium Alisse

Product information

Description

The Ursium Alisse is a luxury Lutron-compatible thermostat for Abu Dhabi and Dubai. Using the Ursium Pro base unit, Polar Bear Design delivers premium dual-zone heating and cooling control systems with designer finishes that complement modern luxury interiors and home automation projects.

Product specifications

AESTHETIC FEATURES 

  • Digital crown temperature control user interface
  • Bright Full Colour wide viewing angle Display
  • Aesthetic Matching with leading manufacturer lighting keypads
  • Customisation of finishes and custom digital crown using materials like carbon fibre,wood, leather, acrylics and gold.

TECHNICAL FEATURES

  • Intuitive Digital Crown for simple control
  • Full Colour IPS Capacitive Touch Screen
  • Independently Control of two rooms for both heating and cooling
  • Optional Towel Rail Control
  • Optional Hot Water Control
  • Centigrade & Fahrenheit with dynamic swap support
  • External / Remote temperature probe inputs
  • Minimum and Maximum floor temperature control
  • Virtual Temperature interface with VRV & VRF
  • Modbus Communications Interface

Model Numbers

  • URS-ACM-NONE: Single gang electronics base unit with local AC control.
  • URS-FP1-ALI-ff: Lutron Alisse Single Gang Face Plate Kit with digital crown.

Temperature & Sensor Capabilities

  • Measurement: Centigrade or Fahrenheit.
  • Configurable Display Resolutions: 0.1, 0.5 & 1.0 °C/°F.
  • Accuracy: ±0.5°C / ±1°F.
  • Dead Band Support: 0–8°C (0.5°C increments) for heating and cooling (16°C total width).
  • Floor Temperature: Configurable maximum and minimum for Zones 1 & 2.

Zone Support

  • Zone 1:
  • Internal temperature and humidity sensors.
  • 3 remote probe inputs (2 Wall, 1 Floor).
  • Zone 2:
  • 2 remote probe inputs (1 Wall, 1 Floor).
  • Can be enabled or disabled.
  • Probe Length: 1m to 10m.

Heating & Cooling

  • Heating:
  • Enable/disable by zone.
  • Optional heating modulation.
  • 3-stage heating (Primary, Secondary, Third).
  • Cooling:
  • Enable/disable by zone.
  • Direct or indirect (via Modbus).

Operation & Eco Modes

  • Operation Modes: OFF, AUTO, Away, Heating Only, Cooling Only.
  • Eco Modes: OFF, Low, Medium, High with configurable thresholds.

Towel Rail & Hot Water Control

  • Optional override and timers (2/day for each).

Humidity & Setpoint

  • Humidity Range: 15%–85% RH (±5% accuracy).
  • Setpoint Range: 5–36°C (increments of 0.5°C/1.0°C).

Scheduling

  • Built-in RTC with 7 room profiles.
  • 5/2 day timers:
  • Zone 1 & 2: 4/4 settings per day.
  • Towel Rail & Hot Water: 2/day.

Power

  • Supply: 18–28V DC, 40mA typical consumption.
  • Protections: Short circuit and overload support.

Display

  • Screen: 2.4-inch IPS TFT, 50,000-hour lifespan.
  • Touchscreen optional.

Communications

  • Modbus RTU, 9600–115200 Baud, 1–32 IDs.
  • Secondary Modbus in ACM models (MASTER mode @ 9600bps).

Additional Features

  • Digital Inputs: 2 Volt-Free (ACM models).
  • ESD Protection: IEC 801-2, withstands 15kV discharge.
  • Memory: Non-volatile EEPROM (100,000 writes).
  • Environment: -5°C to 40°C, 0–85% RH (indoor use, IP20).

Mounting & Wiring

  • Wiring: SELV/PELV/NEC® Class 2 compliant.
  • Terminals: Accepts 24–12 AWG wires.


Product Description

Digital Crown

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