AIR-TO-WATER HEAT PUMPS – PRO SERIES – ZIRAN PRO MAXIMA KWRH
ziran pro maxima
Air-to-water heat pumps suitable for cold climates | water production up to 77ºC
41-84 kW47-91 kW
Documentation
Features
Specifications table
Views & Dimensions
Controls
Documentation
Commercial documentation
Available languages:
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Features
Air-to-water heat pumps suitable for cold climates Water production up to 77ºC
Reversible or cooling-only units with a thermal power ranging from 47 kW to 91 kW, designed for commercial applications.
Optimized for the use of R290 refrigerant and Full-Inverter technology, these units are part of the new PRO Series developed by KEYTER.
Adaptation and Environment
- Reduced charge of natural R290 refrigerant of A3 class, which is environmentally friendly with a low global warming potential (GWP=3) and high thermodynamic performance.
- High-temperature water production.
- The robust and reliable design integrates leak detection and an ATEX extraction fan for maximum safety.
- With careful insulation, they ensure proper equipment protection and noise reduction, achieving ultra-quiet operation.
- The units are equipped with intelligent control that ensures an optimal defrosting process.
Energy Efficiency
- Compact Full-Inverter units are mounted with semi-hermetic piston compressors and high-quality EC fans, ensuring the best seasonal performance (SEER/SCOP).
- High-efficiency heat exchangers.
- These units have a wide operating range with high efficiency and extended operating limits, functioning at full load down to -25ºC outdoor temperature.
Specifications table
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General characteristics | KWRH |
|---|---|---|
| Refrigerant | R290 | ✓ |
| Equipment with refrigerant charge | ✓ | |
| Leak detector | ✓ | |
| ATEX axial fan for refrigerant extraction | ✓ | |
| ATEX centrifugal fan for refrigerant extraction | • | |
| Indicator light in case of leakage | ✓ | |
| Bodywork | Self-supporting chassis/cabinet made of galvanized steel with oven-cured polyester powder coating | ✓ |
| Custom color to match installation requirements | • | |
| Enclosed compartment with panels for refrigeration components | ✓ | |
| Polypropylene insulation of refrigeration compartment panels | • | |
| Enclosed compartment with 20 mm rock wool sandwich panels for refrigeration components | • | |
| Enclosed compartment with panels for hydraulic components | • | |
| Polypropylene insulation of hydraulic compartment panels | • | |
| Enclosed compartment with 20 mm rock wool sandwich panels for hydraulic components | • | |
| Anti-vibration mounts | • | |
| Compressors | Piston technology with variable frequency drive | ✓ |
| Compressor anti-vibration mounts | ✓ | |
| Expansion valves | Electronic expansion valves | ✓ |
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Fans | KWRH |
|---|---|---|
| Outdoor fans | EC axial fans with integrated curved nozzle | ✓ |
| Condensing pressure control | ✓ | |
| High-performance EC axial fans | • | |
| EC plug-fan radial fans | • | |
| Curved external nozzles (Silent ring) (available only with high-performance EC fans) | • | |
| AxiTop diffusers for axial fans (available only with high-performance EC fans) | • |
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Heat exchangers | KWRH |
|---|---|---|
| Coils | Cu tube and Al fin coils | ✓ |
| Cu tube bundle / polyurethane pre-lacquered Al fins | • | |
| BLYGOLD: Cu tubes / Al fins with Blygold coating | • | |
| COPPERFIN: Cu tubes / Cu fins | • | |
| Heat exchangers | Propane-water heat exchanger, AISI 316L stainless steel plates, copper-welded and thermally insulated | ✓ |
|
Energy | KWRH |
|---|---|---|
| Energy recovery | Partial recovery of condensation energy for domestic hot water (DHW) | • |
| Pump in the condensation heat recovery circuit | • | |
| Electric anti-icing heater in the plate heat exchanger for domestic hot water (DHW) recovery | • |
 |
Hydraulic | KWRH |
|---|---|---|
| Pumps (version P/H) |
Single pump, normal available pressure (7-12 mH₂O) | ✓ |
| Single pump with high pressure available (15-20 mH₂O) | • | |
| Single pump, very high available pressure (25-30 mH₂O) | • | |
| Pump with variable speed drive | • | |
| Backup pump (standard pressure, high pressure, and very high pressure available) | • | |
| Electronic pump | • | |
| Electronic backup pump | • | |
| 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 for S version | • | |
| Independent module with available buffer tank of 200 liters / 375 liters / 725 liters + electric heaters | • |
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Installation | KWRH |
|---|---|---|
| Protection grilles | Coil protection grille | • |
| Insulation | Thermal insulation in all cold metal lines (refrigerant or water) | • |
| Power supply | 400 V / III ph / 50 Hz with neutral | ✓ |
| 400 V / III ph / 60 Hz | • | |
| Other electrical voltages (see different options available) | • | |
| Packaging | Packaging for maritime transport | • |
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Control | KWRH |
|---|---|---|
| Electronic control and communication |
Programmable electronic control AQUAMATIX | ✓ |
| Climatix HMI user terminal for AQUAMATIX control | ✓ | |
| RS485 communication interface for ModBus communication | ✓ | |
| Modbus TCP/IP and BACnet IP communication | ✓ | |
| 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 | Electrical panel insulated against refrigerant leaks | ✓ |
| 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 | • |
| ✓ | Included as standard |
| • | Optional |
| – | Not applicable |
Views & Dimensions
Serie 1 S/P/H
Serie 2 S/P/H
Serie 3 S/P
Serie 3 H
Serie 4 S/P/H
| Chásis | Serie 1 S/P/H | Serie 2 S/P/H | Serie 3 S/P | Serie 3 H | Serie 4 S/P/H |
|---|---|---|---|---|---|
| L | 2640 | 3240 | 4340 | 4940 | 5350 |
| W | 1300 | 1300 | 1300 | 1300 | 1300 |
| H | 2550 | 2550 | 2550 | 2550 | 2550 |
Controls
ZIRAN PRO MAXIMA includes the programmable electronic control AQUAMATIX and user terminal Climatix HMI.
It is compatible with optional RS485 card for Modbus communication and BACnet IP communication system.
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