Zehnder Caladair Freetime First Eco 3500

Product Part Number:

Caladair FREETIME 3500 First Eco - CAL24

Description

The Zehnder Caladair Freetime First Eco 3500 is a high-performance, energy-efficient commercial heat recovery unit designed for industrial and commercial applications. Featuring advanced zoning controls, heating & cooling compatibility, and high-efficiency filtration, this unit ensures superior indoor air quality and optimal performance.

Additional Zoning Options

Optional extras allow zone control via electric duct dampers, operated through:

• PIR Sensor – Detects occupancy and increases airflow.
• CO₂ Sensor – Detects high CO₂ levels and adjusts airflow.
• Wall Switch – Manually increases airflow.
• Light Sensor – Adjusts airflow when lights are switched on.
• BMS (Building Management System) – Controls zoned areas and unit settings.
• Dampers – Configurable to various airflow rates when open or closed.

For customization and additional zoning options, contact our sales team at 028 2827 5150.

Heating & Cooling Accessories

Available accessories include:

• Electric Preheater – Prevents frost buildup.
• Electric Post Heater – Increases room temperature.
• Water Heater – Can be used as a pre-heater or post-heater.

Controllability

A Digital Control Panel is available for use when not connected to a BMS system.

LCD Controller Functions:

• Weekly timer
• Holiday timer
• Summer by-pass / Night-time cooling
• Fault finding
• Speed parameters
• Filter indicator
• Fire alarm integration
• Temperature sensors
• Integration via Modbus, Bacnet, or Web

Filtration

• 1x F7 large-capacity pollen intake filter
• 1x G4 extract filter

Construction

• Outer Construction: Airtight 10-gauge galvanized steel double-skin panels with 25mm high-density mineral wool insulation in accordance with EN1886.
• External Face: Pre-lacquered with a protective film in RAL 7035.
• Connections: Circular branch connections with rubber seals. Airtight construction to ATEC CSTB n° 13-224-12.
• Mounting: Crimped hanging brackets for ceiling mounting.

Heat Exchanger

• Highly efficient aluminium counter-flow heat exchanger that provides up to 90% heat recovery, designed for lifetime use.

Motors

• 2x low-energy, high-efficiency backward curved EC motors with heat and speed protection.

Installation

• The unit is horizontally mounted on the ceiling or floor with adjustable hanging brackets. Ensure the structure can support the unit’s weight.
• Condensate Drain: 15mm BSP metal pipe provided on the side of the unit, which should be connected to a drain via a waterless trap.

Dimensions

Installation of Ductwork

We recommend using Metal Spiral Ducting and fittings for superior strength. To ensure optimal airtightness and durability, use self-sealing fittings or a combination of Ducting Sealant and Aluminium Duct Sealing Tape.

Accessories

A full range of controls, sensors, in-line silencers, floor/wall/ceiling inlets, and outlet diffusers are available to complete the installation.

Guarantee

• 2-Year Parts Guarantee for peace of mind.

Please Note – These units are built to order. For lead times on the Caladair Freetime Commercial Units, please contact our sales team at 028 2827 5150.