WATTS Vision® Wired
Wired Electronic Room Thermostat
A03 Heat
Quick Installation Guide
Safety Warnings and Operating Instructions
This product should be installed by a qualified professional according to all applicable regulations and standards. All instructions in this Installation & Operation manual should be observed when working with the thermostat. Failures due to improper installation, improper use or poor maintenance are voiding manufacturer liability.
[⚠] Before starting work disconnect power supply!
All installation and wiring work related to the thermostat must be carried out only when de-energized.
The thermostats are neither splash- nor drip-proof. Therefore, they must be mounted at a dry place.
Package Contents
- 1 x Vision® Wired Thermostat
- 1 x Base Plate
- 1 x Mounting Kit (screws and wall plugs)
Installation Steps
Step 1: Mount the Base Plate
Select a suitable location for the thermostat, away from direct sunlight, heat sources, or drafts. Ensure it is at least 1.5 meters from the floor and a minimum of 20 cm from corners or obstructions. Mount the base plate securely to the wall using appropriate fixings.
Diagram Description: Illustration shows the base plate being screwed to the wall, with a measurement of 'Min. 20 cm' from a corner and '1.5 m' from the floor.
Step 2: Wiring
Connect the wires according to the wiring diagram. Ensure the power supply is disconnected before proceeding. Use appropriate wire gauges (0.5 - 1.5 mm²) and strip lengths (7-10 mm).
Diagram Description: Wiring diagram showing connections for a 24-230V~ system. Terminals are labeled L (Live), N (Neutral), Lout (Output), NO (Normally Open), NC (Normally Closed). Connections are made to the Room Thermostat, Controller, and Actuators. Specific connections for Heat Pump or Boiler systems are indicated.
Step 3: Attach the Thermostat
Carefully align the thermostat with the base plate and push it until it clicks into place.
Diagram Description: Illustration shows the thermostat being attached to the mounted base plate, with an audible 'Click' indicated.
Step 4: Initial Setup and Operation
Once installed, power can be restored. The thermostat will power on. Adjust the temperature using the dial. The dial has markings for temperature settings from 7°C to 30°C.
Diagram Description: Close-up of the thermostat dial showing temperature settings and adjustment. A small indicator shows the current setting, e.g., '21°C'.
Technical Specifications
| Category | Specification |
|---|---|
| Environmental | Operating temperature: 0°C - 40°C Shipping and storage temperature: -10°C to +50°C |
| Electrical | Electrical protection: IP30 Security isolation: Class II Class ErP: Level IV Energy efficiency gain: 2% |
| Performance | Temperature precision: 0.1°C Setting temperature range: 7°C to 30°C, 0.5°C step Off (Antifreeze): 7°C Regulation characteristics: Hysteresis 0.6°C |
| Power | Power supply: From 24V to 240VAC 50Hz Power output: Live Triac, NO or NC 24VAC: Max. 5 actuators (1.6W/actuator) 230VAC: Max. 8 actuators (1.8W/actuator) Internal sensing element: NTC 10kΩ at 25°C |
Product Dimensions
The thermostat has a circular design with a diameter of approximately 85 mm. The depth is approximately 20.3 mm. The base plate has dimensions of 60 mm x 85 mm.
Diagram Description: Diagrams showing the front view, side view, and back view of the thermostat with dimensions clearly marked.
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