Commercial air handling unit CALOREX DELTA SERIES

indoor

Overview
The Delta air handling units integrate hybrid heat-pump dehumidification with controlled fresh-air intake and dynamic heat recovery to pool water and air. Designed for commercial and public indoor swimming pools, Delta units combine dehumidification, heat recovery and building integration for efficient environmental control.

Key features

• Dynamic heat-pump heat recovery to pool and air
• Self-regulating fresh air control with heat recovery
• Automatic exhaust-air volume control to match pool usage
• Free-cooling (Delta 1–2)
• Free-cooling and heat-pump air cooling (Delta 4–16)
• Integral LPHW heat exchangers for pool and air
• Controllable rpm EC / inverter fans on all models
• PLC control with 5.7" touchscreen user interface
• Remote monitoring/control
• Minimum security update period for Delta products: zero months

Remote monitoring / control

• Screen mirroring to Android/iOS mobile devices using a third‑party app
• Screen mirroring to web browser with ActiveX
• BMS interfaces: Modbus, BACnet IP and BACnet MS/TP
• Wired remote control interfaces

Options

• DT 2–6 single- or three-phase variants
• DT 8–16 three-phase only
• Upgraded LPHW heat exchanger for air heating
• Left-hand or right-hand orientation (Delta 4–16)
• Top, side or bottom supply fan outlet
• Front or rear supply fan outlet (Delta 14–16)
• Rear exhaust and fresh air connections (Delta 14–16)
• Connection for RCU (Delta 16)

Technical specifications

• Series designation: Calorex Delta series (models DT 2, 4, 6, 8, 10, 12, 14, 16)
• Nominal recirculation air flow (m³/h): DT 2 = 2,600; DT 4 = 3,000; DT 6 = 4,000; DT 8 = 5,000
• Exhaust / fresh air flow (stepped control) (m³/h): DT 2 = 130–1,300; DT 4 = 150–1,500; DT 6 = 200–2,000; DT 8 = 250–2,500
• Total dehumidification @ 28°C / 60% RH by heat pump & max fresh air (l/h): DT 2 = 10.9; DT 4 = 12.5; DT 6 = 16.6; DT 8 = 20.8
• Heat to air via heat pump (Mode B) (kW): DT 2 = 4.9; DT 4 = 5.1; DT 6 = 6.6; DT 8 = 8.0
• Heat to air via standard LPHW @ 80°C (kW): DT 2 = 22; DT 4 = 25; DT 6 = 30; DT 8 = 35
• Heat to air via upgraded LPHW @ 55°C (kW): DT 2 = 19; DT 4 = 21; DT 6 = 26; DT 8 = 30
• Total Mode B + standard LPHW (kW): DT 2 = 26.9; DT 4 = 30.1; DT 6 = 36.6; DT 8 = 43.0
• Heat to pool water via heat pump (Mode A) (kW): DT 2 = 5.5; DT 4 = 5.8; DT 6 = 8.0; DT 8 = 10.0
• Total Mode A + LPHW (kW): DT 2 = 28.5; DT 4 = 38.8; DT 6 = 41.0; DT 8 = 43.0
• Cooling duty (kW, indicated as removal where applicable): DT 2 = 0; DT 4 ≈ -4.2; DT 6 ≈ -5.5; DT 8 ≈ -6.7
• Sensible (kW): DT 2 = 0; DT 4 ≈ -2.9; DT 6 ≈ -3.9; DT 8 ≈ -4.7
• Nominal power consumed (kW): DT 2 = 2.9; DT 4 = 2.9; DT 6 = 3.4; DT 8 = 4.4
• Refrigerant / CO2 equivalent (R407c): DT 2 = 3.0 kg / 5.32 t CO2-eq; DT 4 = 6.0 kg / 10.64 t CO2-eq; DT 6 = 7.8 kg / 13.84 t CO2-eq
• External dimensions (mm) (examples): Width: DT 2 = 1,740; DT 4/6/8 = 1,840. Depth: DT 2 = 654; DT 4/6/8 = 704. Height: DT 2 = 1,685; DT 4/6/8 = 1,970
• Unit weight (kg): DT 2 = 310; DT 4 = 350; DT 6 = 360; DT 8 = 360
• Fans: Controllable rpm EC / inverter fans on all models
• Controls: PLC with 5.7" touchscreen; remote monitoring / BMS integration (Modbus, BACnet IP, BACnet MS/TP); screen mirroring and web access options