Air source heat pump VITOCAL 250-A PRO

commercialresidentialoutdoor

Overview
The Vitocal 250-A PRO is a monobloc air-source heat pump designed for large properties, apartment buildings and commercial applications. It supplies heating, cooling and domestic hot water (DHW) using outdoor air as the heat source. The sound-insulated outdoor unit with a variable-speed scroll compressor and electronic expansion valves enables flow temperatures up to 70 °C while using the natural refrigerant R290.

Key features

• Nominal heating output up to 39.5 kW (A7/W35)
• Heating, cooling and water heating in a single monobloc unit
• Low-noise mode for installations in densely populated areas
• Variable-output control; single unit up to 39.5 kW
• Cascade arrangement available for higher outputs (up to 4 units)
• Options for DHW: cylinder loading pump or Vitotrans 353 freshwater module
• Integration into BMS via BACnet/IP or Modbus TCP/IP; hardware contacts for external control
• Suitable for modernisation and new builds thanks to 70 °C maximum flow temperature (down to −2 °C)
• Compact footprint for space-saving outdoor installation
• Factory pre-installed switching, control and safety equipment for faster commissioning

Product details
Type: AWO-AC-AF 251.A40
Heating performance to EN 14511 (A7/W35): 39.5 kW
Cooling performance to EN 14511 (W7/A35): 26.0 kW
Refrigerant circuit: 1 compressor, 1 refrigerant circuit
Refrigerant: R290 — charge 3.3 kg — GWP100 (IPCC AR6): 0.02 — CO₂ equivalent: 0.06 kg
Maximum flow temperature (down to −2 °C): 70 °C
Sound power of outdoor unit at rated heating output (EN 12102 / EN ISO 3744): ErP 58.2 dB(A); Maximum 69.8 dB(A); Low-noise mode 60.9 dB(A)
Weight: 550 kg
Dimensions (L × W × H): 1900 × 940 × 1570 mm
Energy efficiency class (Energy Label 811/2013): A+++
Application area: large properties, apartment blocks, commercial buildings, modernisation and new builds

Product cross-section (main components)

• Coated evaporator with corrugated fins for improved heat transfer
• Power-saving variable-speed axial fan
• Refrigerant float valve
• Filter dryer
• Refrigerant receiver
• Heat exchanger
• Variable-speed scroll compressor

Benefits

• Combined heating, cooling and DHW from one outdoor monobloc unit
• Dual-mode operation with external heat generator to cover peak loads
• Scalable output via cascade (up to 4 units = 158 kW)
• High flow temperature capability supports modernisation projects
• Demand-oriented output control via electronic expansion valves
• Use of natural refrigerant R290 with low GWP
• Compact outdoor footprint and weatherproof multilayer-coated casing
• Low sound emissions enable installation in dense urban areas
• Factory pre-installation reduces on-site work and speeds commissioning
• Integration and remote monitoring via Modbus TCP/IP and BACnet/IP
• Easy service access and online system monitoring
• Eligible for attractive subsidy programmes (e.g. up to £7,500 with BUS)

Technical specifications / characteristics

• Rated heating output (A7/W35): 39.5 kW
• Rated cooling output (W7/A35): 26.0 kW
• Refrigerant: R290 — charge 3.3 kg — GWP100: 0.02
• Maximum flow temperature: 70 °C (down to −2 °C)
• Sound levels (A7/W55): ErP 58.2 dB(A); Maximum 69.8 dB(A); Low-noise mode 60.9 dB(A)
• Weight: 550 kg
• Dimensions (L × W × H): 1900 × 940 × 1570 mm
• Energy efficiency class: A+++
• Indoor system support: up to three mixed heating/cooling circuits and seasonal buffer cylinder; DHW via cylinder loading pump or Vitotrans 353 freshwater module