AIR-TO-WATER HEAT PUMPS – QU4TRO K4A
qu4troK4A
Polyvalent air-to-water heat pumps
for mild climates
68-285 kW80-358 kW
Documentation & Features
Specifications table
Views & Dimensions
Controls
Documentation & Features
Commercial documentation
Available languages:
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Multipurpose air-to-water heat pumps for mild climate
68-285 kW 80-358 kW
Simultaneous production of hot and cold water
Adaptation and Environment
- Reduced refrigerant charge with low GWP R-454B, minimizing the CO₂ footprint (-77% lower GWP than R-410A and -31% lower than R-32).
- Maximum comfort: simultaneous heating and cooling with a single, simple HVAC unit.
- Series condensing pressure control for year-round operation.
- Adaptability to the installation with a wide range of models.
- Optimized defrosting management.
Energy Efficiency
- Very high seasonal energy efficiency thanks to multi-scroll technology and the versatile K4Smart management system.
- Electronic fans and electronic expansion valve as standard for minimal energy consumption.
- Great versatility and efficiency as they maximize the recovery of condensation heat.
- Year-round hot water production.
- Maximum reliability thanks to the multi-circuit system.
Specifications table
General characteristics
K4A
Refrigerant
R454B
✓
Equipment with refrigerant charge
✓
R452B or R410A refrigerants
●
Leak detection
●
Bodywork
Self-supporting bodywork/cabinet made of galvanised steel with oven cured polyester paint treatment
✓
Customized color to suit the needs of the installation
●
Equipment without paneling
✓
Perimeter enclosure of the unit (1)
●
Perimeter enclosure insulation
●
Anti-vibration supplements
●
Compressors
Multiscroll technology in tandem
✓
Compressor anti-vibration mounts
✓
Soft starter
●
Acoustic insulation jacket
●
Original high-performance acoustic insulation jacket from the manufacturer
●
Expansion valves
Electronic expansion valves
✓
Fans
K4A
Outdoor fans
EC technology axial fans
✓
Condensing pressure control
✓
Internal nozzles
✓
Straight external nozzles / Curved external nozzles (Silent ring)
●
AxiTop diffusers for axial fans
●
High-performance EC axial fans
●
EC plug-fan radial fans
●
Heat exchangers
K4A
Coils
Cu tube and Al fin coils
✓
Al / Al microchannel batteries
●
Cu tube bundle / polyurethane pre-lacquered Al fins
●
ALUCOAST: high-strength Cu tubes / Al fins
●
BLYGOLD: Cu tubes / Al fins with Blygold coating
●
COPPERFIN: Cu tubes / Cu fins
●
Heat exchangers
Refrigerant-water heat exchangers (evaporator / heat recovery), AISI 316L stainless steel plates, copper-welded, and thermally insulated
✓
Heat exchangers (evaporator/heat recovery) in stainless steel SS AISI 304 / SS AISI 316 / Sealix
●
Hydraulic
K4A
Hydraulic components
Low temperature kit for operation with water outlet temperature < 0 ºC
●
Low outdoor temperature kit
●
Flexible water inlet and outlet connections
●
Water filter
●
Installation of pressure gauges at the inlet and outlet of the equipment
●
Installation
K4A
Protection grilles
Coil protection grille
●
Bird-proof protection grille at the base of the equipment
●
Insulation
Thermal insulation in all cold metal lines (refrigerant or water)
●
Power supply
400 V / III ph / 50 Hz without neutral
✓
400 V / III ph / 60 Hz
●
Other electrical voltages (see different options available)
●
Packaging
Packaging for maritime transport
●
Control
K4A
Electronic control and communication
Programmable electronic control Aquamanager
✓
User and maintenance terminal pGD1 for AQUAMANAGER control (standard maximum distance between terminal and controller: 50 m)
✓
TCONN cards (for distances between terminal and controller greater than 50 m) (consult technical manual)
●
Condensing pressure control and evaporation with transducers
✓
Management of up to two pumps in the evaporator
✓
Master-Slave management
●
RS485 card for Modbus communication
●
BOSS / tERA monitoring systems
●
BACNET communication
●
Defrosting
Defrosting by cycle reversal using a 4-way valve
✓
Additional control and safety components
Main switch in electrical panel
✓
Magneto-thermal protections for compressors, fans and pumps
✓
Differential switches
●
Low pressure switch for pump protection
●
PREMIUM phase control relay, with phase failure detection and direction of rotation protection
✓
EXCELLENT phase monitoring relay, adds phase unbalance, overvoltage and undervoltage detection
●
Triple protection for the plate heat exchanger with a water flow switch and anti-ice protections for both water and refrigerant
✓
Energy meter
●
Electrical panel
Fully wired electrical panel, with IP54 protection
✓
Forced ventilation of the electrical panel
✓
Design of electrical switchgear for high temperatures
✓
Tropicalised electrical panel
●
Socket for common use
●
Antifreeze electrical resistor in electrical panel for low outdoor temperatures
●
Views & Dimensions
Series 1
Series 2
| Dimensions (mm) | Series 1 | Series 2 |
|---|---|---|
| L | 2190 | 2980 |
| W | 1100 | 2100 |
| H | 2400 | 2280 |
If a hydraulic group is required, a separate hydraulic module is necessary.
Controls
QU4TRO includes the programmable electronic control AQUAMANAGER and user terminal pGD1.
It is compatible with optional RS485 card for Modbus communication, boss / tERA Supervision systems, and BACNET / LONWORKS / KNX communication system.
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