30WI (250-820kW) Water-to-Water Heat Pumps | Carrier UK

The new generation of AQUASNAP 30WI water cooled heat pumps and water chillers offers an optimal solution for all heating process or cooling applications. These units are designed to be installed in machine rooms that are protected against freezing temperatures and inclement weather.

  • Cooling and heating application
  • High energy efficiency
  • Compact design
  • Low sound level
  • Broad field of application

Cooling-only or heating-only models with water-cooled condenser.


Acoustic configuration:


a – STANDARD version

b – LOW NOISE version. Compressor casing

c – VERY LOW NOISE version. Casing with compressor sound insulation

General description

  • SCROLL hermetic compressors
  • Chilled water evaporator with brazed plates
  • Hot water condenser with brazed plates
  • Electrical power and remote control cabinet:
    • 400V-3ph-50Hz general electrical power supply (+10%/-10%) + earth
    • Transformer fitted as standard on the machine for supplying the remote control circuit with 230V-1ph-50Hz
  • 30WI Control electronic control module

European standards and directives compliance

  • Machinery directive 2006/42/EC
  • Electromagnetic compatibility directive 2004/108/EC
  • EMC immunity and emissions EN 61800-3 ‘C3’
  • Low voltage directive 2006/95/EC
  • RoHS 2011/65/EU
  • Pressure equipment directive (PED) 97/23/EC
  • Machinery directive EN 60-204 -1

Main components

  • Compressors
    • Built-in electric motor cooled by intake gases
    • Motor protected by internal winding thermostat
    • Placed on anti-vibration mounts
  • Evaporator and condenser
    • Brazed plate exchanger.
    • Stainless steel plates (AISI 316)
    • Plate patterns optimized for high efficiency
    • Armaflex thermal insulation on evaporator
  • Refrigerating accessories
    • Dehumidifier filters with rechargeable cartridges
    • Hygroscopic sight glasses
    • Solenoid valves on refrigerant lines (700 V to 1200 V models)
    • Electronic expansion valves
  • Control and safety instruments
    • High and low pressure sensors
    • High pressure safety valves
    • Water temperature control sensors
    • Evaporator frost protection sensor
    • Factory-assembled evaporator water flow controller
  • Electrical box
    • Main safety switch with handle on front
    • Control circuit transformer
    • Circuit breaker for compressor motor
    • Compressor motor switches
    • Wire numbering
    • Marking of the main electrical components

30WI Electronic control module

  • Regulation of the chilled or hot water temperature
  • Regulation of the water temperature based on the outdoor temperature (water law)
  • Regulation for low temperature energy storage
  • Second set-point management
  • Complete management of compressors with start-up sequence, metering and runtime balancing
  • Self-adjusting and proactive functions with adjustment of parameters on drift control
  • In-series staged capacity-reduction system on compressors based on cooling and heating demands
  • Management of compressor short cycle protection
  • Management of the machine operation limit according to outdoor temperature
  • Operating and fault status diagnostics
  • Management of a fault memory allowing a log of the last 20 incidents to be accessed, with operating readings taken when the fault occurs
  • Master/slave management of the two machines in parallel with runtime balancing and automatic changeover if a fault occurs on one machine
  • Machine time schedule
  • Display and access to the operating parameters via a multilingual LCD screen with 4 lines of 24 characters

Remote management

  • Automatic operation control
  • Set-point 1/set-point 2 selector
  • Heating/cooling mode selector
  • Set-point adjustable via 4-20 mA signal
  • Compressor load shedding
  • Water pump 1 and 2 control
  • Fault reporting


  • Low noise level
  • Very low noise level
  • Lon, J-Bus or BacNet gateway
  • Master/slave operation
  • Soft Starter
  • Remote control unit
  • Electrical energy meter
  • Refrigerant leak detection
  • Phase monitor

Enquire About This Product

Overseas Enquiries please visit carrier.com

A Carrier Company.
© 2020 Carrier