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NORDIS ULTIMA MONO Split 12.0kW R290 heat pump with 250L hot water tank HLT12MONO-S / HLT-9-250-3S

NORDIS ULTIMA MONO SPLIT air-to-water heat pump with 250 L domestic hot water tank, HLT12MONO-S / HLT-9-250-3S, 12.0 kW, R290
DESCRIPTION
The NORDIS ULTIMA MONO SPLIT HLT12MONO-S / HLT-9-250-3S is a powerful complete system for space heating, cooling and domestic hot water production.
The set combines an HLT12MONO-S outdoor unit with up to 12.0 kW heating capacity and a floor-standing HLT-9-250-3S indoor unit incorporating a 250-litre domestic hot water tank. Its All-in-One design saves space and reduces the number of separately installed hydraulic components.
At A7/W35 conditions, heating capacity is modulated between 5.21 and 12.0 kW. Full inverter technology continuously adjusts compressor output according to the building’s actual demand, helping maintain stable temperatures while reducing unnecessary electricity consumption.
The system uses natural R290 refrigerant with a global warming potential of only GWP 3. R290 has no ozone-depletion potential and enables a leaving-water temperature of up to 75 °C.
This high water temperature makes the heat pump suitable for new homes with underfloor heating as well as renovated buildings and radiator systems requiring higher flow temperatures.
At a 35 °C water temperature, the system achieves an A+++ energy class and SCOP of 4.76. At 55 °C, it achieves an A++ class and SCOP of 3.56.
Heating operation is available at outdoor temperatures down to -25 °C. An intelligent defrosting algorithm monitors outdoor conditions and activates defrosting only when required, supporting stable and efficient winter operation.
The integrated 250 L domestic hot water tank is manufactured from durable Duplex 2205 stainless steel. DHW priority control heats the tank when required, while scheduled operation and automatic disinfection support convenient and hygienic hot water production.
The indoor unit incorporates a two-stage 9 kW backup electric heater with 3+6 kW control. Factory-integrated hydraulic components include a Grundfos circulation pump, Vortex flow meter, LK Systems three-way diverting valve and two 5 L expansion vessels.
A 7-inch colour touchscreen provides intuitive control of heating, cooling and domestic hot water. Built-in Wi-Fi enables remote control through a mobile application, while real-time COP and energy-consumption monitoring helps users track system efficiency.
Weather-compensated heating and cooling curves automatically adjust the water temperature according to outdoor conditions. Dual-zone control can supply different temperatures to underfloor heating and radiator circuits.
Smart Grid Ready functionality supports integration with intelligent energy-management systems. The outdoor sound pressure level is 41 dB(A) at one metre, while the indoor unit operates at only 21 dB(A).
MAIN BENEFITS
• Heating, cooling and DHW in one system
• Heating capacity up to 12.0 kW at A7/W35
• Cooling capacity up to 10.1 kW at A35/W18
• Natural R290 refrigerant with GWP 3
• A+++ energy class at 35 °C
• A++ energy class at 55 °C
• SCOP 4.76 at 35 °C
• SCOP 3.56 at 55 °C
• Leaving-water temperature up to 75 °C
• Heating operation down to -25 °C
• Full inverter technology
• Intelligent defrosting algorithm
• Integrated 250 L DHW tank
• Duplex 2205 stainless-steel tank
• 9 kW two-stage backup heater, 3+6 kW
• Grundfos circulation pump
• Vortex water flow meter
• LK Systems three-way valve
• Two integrated 5 L expansion vessels
• Automatic DHW disinfection
• DHW priority control
• Dual-zone control
• Weather-compensated heating and cooling curves
• 7-inch colour touchscreen
• Built-in Wi-Fi
• COP and energy monitoring
• Smart Grid Ready
• Suitable for underfloor heating and radiators
• Suitable for new and renovated buildings
TECHNICAL DATA
System model: HLT12MONO-S / HLT-9-250-3S
Type: air-to-water heat pump
Functions: heating, cooling and DHW production
Outdoor unit: HLT12MONO-S
Indoor unit with tank: HLT-9-250-3S
Refrigerant: R290
Refrigerant charge: 0.9 kg
GWP: 3
Compressor: DC twin rotary inverter
Outdoor power supply: 220–240 V / 1 phase / 50 Hz
Indoor power supply: 380–415 V / 3 phase / 50 Hz
Energy class at 35/55 °C: A+++/A++
SCOP at 35/55 °C: 4.76/3.56
Rated heat output at 35/55 °C: 8.97/8.21 kW
Seasonal heating efficiency at 35/55 °C: 187.5/139.4%
Annual energy consumption at 35/55 °C: 3889/4766 kWh
Heating capacity at A7/W35: 5.21–12.0 kW
Power input at A7/W35: 0.99–3.06 kW
COP at A7/W35: 3.93–5.31
Heating capacity at A7/W45: 4.38–11.7 kW
Power input at A7/W45: 1.11–3.55 kW
COP at A7/W45: 3.28–3.94
Cooling capacity at A35/W18: 3.47–10.1 kW
Power input at A35/W18: 0.94–2.97 kW
EER at A35/W18: 3.40–3.93
Cooling capacity at A35/W7: 2.16–7.19 kW
Power input at A35/W7: 0.97–2.76 kW
EER at A35/W7: 2.23–2.64
Outdoor operating range: -25 to +43 °C
Heating water temperature range: +20 to +75 °C
Cooling water temperature range: +7 to +25 °C
DHW tank capacity: 250 L
Tank material: Duplex 2205 stainless steel
Backup heater: 9 kW, 3+6 kW
Three-way valve: LK Systems
Flow meter: Vortex
Circulation pump: Grundfos
Expansion vessels: 2 × 5 L
Water connection: G1"
Water flow, min./rated/max.: 0.40/0.57/0.75 L/s
Indoor dimensions: 600 × 710 × 1720 mm
Indoor net weight: 115 kg
Indoor circuit breaker: 16 A
Indoor power cable: 5 × 2.5 mm²
Outdoor dimensions: 1255 × 440 × 985 mm
Outdoor net weight: 120 kg
Outdoor airflow: 3300 m³/h
Fan rated power: 124 W
Outdoor water connection: G1¼"
Outdoor circuit breaker: 25 A
Outdoor power cable: 3 × 4.0 mm²
Indoor/outdoor sound pressure: 21/41 dB(A)
Indoor/outdoor sound power: 34/56 dB(A)
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