HIGH-TEMPERATURE HEATING ELECTRIFICATION

FLEX Water-Cooled Heat Pumps & Chillers for Electrification

Advance building and process-heating electrification with EXINDA FLEX. R515B water-to-water heat pump chillers supply hot water up to 85°C (185°F) alongside chilled-water production, supporting boiler replacement while retaining suitable existing radiators and hydronic pipework. Scroll and inverter screw platforms put recovered heat to work, with 50 Hz and 60 Hz configurations for regional project requirements.

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60 Hz · North America

EXINDA FLEX 33.5 RT R515B Water-to-Water Scroll Heat Pump Chiller

33.5 RT · Water-to-water scroll

33.5 USRT cooling and up to 53 USRT heating, with simultaneous chilled water and continuous hot water up to 185°F. Upgrade boiler-heated buildings while retaining suitable radiators. The 460 V / 60 Hz dual-scroll platform keeps refrigerant inside the unit. Headers and frame separate for freight-elevator access; grooved connections enable reassembly without field refrigerant brazing, charging or electrical reconnection.

R515B · A1 · Low GWP460 V · 3 Ph · 60 HzUp to 185°F

CSA approved · AHRI in program

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EXINDA FLEX 95.8 RT R515B Water-Cooled Screw Heat Pump Chiller

95.8 RT · Water-cooled screw

95.8 USRT cooling and 140.2 USRT heating for larger commercial and institutional plants. Four-pipe operation supplies chilled water and hot water up to 185°F together, recovering heat for building and process loads. Variable-speed screw compression follows demand. Configured for 460 V / 60 Hz boiler upgrades and central-plant projects.

R515B · A1 · Low GWP460 V · 3 Ph · 60 HzUp to 185°F

CSA approved · AHRI in program

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50 Hz · Europe

EXINDA FLEX 118 kW R515B Water-to-Water Scroll Heat Pump Chiller

118 kW · Water-to-water scroll

118 kW cooling and 186 kW heating for existing hydronic buildings and process-water duties. Simultaneous chilled water and hot water up to 85°C support boiler replacement while retaining suitable terminals and pipework. The 380 V / 50 Hz dual-scroll platform combines A1-classified R515B with compact, stackable construction. Sectional transport and grooved water connections simplify access to constrained plant rooms.

R515B · A1 · Low GWP380 V · 3 Ph · 50 HzUp to 85°C
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EXINDA FLEX 337.5 kW R515B Water-Cooled Screw Heat Pump Chiller

337.5 kW · Water-cooled screw

337.5 kW cooling and 492.5 kW heating for commercial and industrial plant upgrades. Four-pipe heat recovery delivers chilled water and hot water up to 85°C simultaneously, serving higher-temperature hydronic and compatible process circuits. Variable-speed screw compression adjusts output to the load on this three-phase, 50 Hz platform.

R515B · A1 · Low GWPThree-phase · 50 HzUp to 85°C
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Technical selection overview

Compare capacity, hot-water temperature and electrical supply across the R515B range. Model performance data provides the water conditions behind each rating.

Model / configurationCompressor platformRated coolingRated heatingHot-water temperaturePower supply
33.5 RT · Water-to-water scrollDual scroll33.5 USRT53 USRTUp to 185°F460 V · 3 Ph · 60 Hz
95.8 RT · Water-cooled screwInverter screw95.8 USRT140.2 USRTUp to 185°F460 V · 3 Ph · 60 Hz
118 kW · Water-to-water scrollDual scroll118 kW186 kWUp to 85°C380 V · 3 Ph · 50 Hz
337.5 kW · Water-cooled screwInverter screw337.5 kW492.5 kWUp to 85°CThree-phase · 50 Hz

Cooling and heating ratings use different water conditions. Confirm capacity and operating limits at the project’s source- and load-side temperatures.

High-temperature water. More possibilities for electrification.

A boiler retrofit starts with the temperatures the building actually needs. FLEX R515B delivers hot water up to 85°C (185°F), bringing heat-pump heating to suitable existing radiator systems and higher-temperature process duties. Simultaneous cooling and heating puts recovered energy to use when demands overlap. EXINDA works with project teams to integrate the equipment with existing water circuits, controls and operating schedules.

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Looking for an air-source system? Explore commercial air-to-water heat pumps

What does 85°C hot water make possible?

It extends heat-pump heating to suitable existing high-temperature radiator systems, central hot-water plants and industrial process-water duties. Buildings can add electric heating and chilled-water cooling while retaining serviceable heating terminals where their design temperatures and capacity match the selected system. R454B offers 7°C chilled water and hot water up to 60°C; R515B raises the hot-water capability to 85°C (185°F).

Can FLEX replace a boiler without replacing every radiator?

FLEX R515B can supply the higher water temperatures required by many existing radiator systems, reducing the need to replace functional heating terminals. Review the building’s design heat load, radiator output, supply and return temperatures and available water-side source. The resulting design can support a full boiler replacement or a phased upgrade with supplementary or backup heat.

How does simultaneous heating and cooling support the project?

FLEX water-to-water scroll and four-pipe inverter screw systems produce chilled water and hot water at the same time. Heat recovered from cooling serves the hot-water load, making use of energy within the facility. Hotels, healthcare buildings and industrial sites with overlapping cooling and hot-water demands can integrate both duties into one coordinated plant.

Where does FLEX fit in a process-heating project?

The R515B range supplies hot water up to 85°C (185°F) for compatible process-water circuits, hot-water preparation and preheating duties. Selection considers required supply and return temperatures, water quality, flow, operating hours and the available source or recoverable heat. EXINDA provides performance data and application support at the project conditions.

Discuss your water-cooled project

Tell us the hot-water temperature your building or process needs, the heating and cooling loads, and the existing boiler and water-system arrangement. Request performance data, technical submittals and support for your electrification project.

Distributors, engineering firms & HVAC Brands

For project teams, we help match equipment to water temperatures, loads and controls. For distributors and HVAC Brands, we review the regional configuration and technical information needed for your market.