Heat pumps
Water to water reversible heat pumps
Reversible heat pump, total heat recovery, water source 5,10-34,8 kW
Series
WWR DHW2 0011ms - 0121t

The PRANA DHW2 water-cooled heat pumps are reversible units for all year round operation in any operating mode: single cycle (air conditioning, heating, domestic hot water) as well as combined cycle in total heat recovery (domestic hot water together with cooling). Energy efficiency is highest during the summer cycle, when, thanks to the full recovery of the heat, the production of hot water is free. During the combined use, the DHW exchanger uses the temperature of the discharge gases to gets inside the accumulation sanitary water as high as 65 °C. The advanced electronic regulation developed by Climaveneta ensures the highest operational flexibility, fast working condition a significant increase in the overall COP, which go hand in hand with electricity and space reduction. Advantages, combined with the possibility of completely eliminating the traditional boiler, making heat pumps PRANA DHW2 the ideal solution for energy saving applications in residential, hotel and small sector.

Controls

NADISYSTEM
Electronic control Nadisystem provides great application flexibility. The remote keyboard kit wired and outdoor air temperature sensors allow dynamic control of delivery temperature water, optimizing comfort in the room and increasing the energy efficiency.
The electronic board allows you to manage:

  • wired remote control, backlit display and with remote temperature and humidity probe
  • outdoor temperature sensor for water plant side modular set point compensation
  • a zone of direct heating for radiator, floor heating or fan coil
  • a zone with mix valve for floor heating
  • electrical heating element for possible integration and anti-legionella cycle for cylinder
  • boiler or electric heater in substitution or in addition
  • the room controller can customise up to six time bands. The presence of the programmable timer allows the creation of an operating    
  • profile containing up to 6 time bands
  • up to 4 heat pump in cascade (with N-CM component)
  • several solutions through appropriate configurations of the controller and use of dedicated extension modules (accessorie), up to 5 zone
Features

Characteristics

Structure and base in hot-dip galvanised steel with epoxy powder paint finish.

Case panels are insulated within low noise material for further improvement of silence

Rubber vibration damper.

Hermetic scroll type compressors, equipped with the crankcase heater and thermal protection

High efficiency and low pressure drop stainless steel AISI 316 plate exchangers (at the domestic hot water side). It is positioned next after the compressor and it ensures the domestic hot water production. The unit has full or partial recovery system, with the constant optimization of efficiency through logic advanced adjusting controller 

High efficiency and low pressure drop stainless steel AISI 316 plate exchangers (plant side) meet the supply of both hot or cold water for the facility, regardless of the domestic hot water

High efficiency and low pressure drop stainless steel (AISI 316) source side plate exchanger

Soft starter for 230V/1/50Hz units (ms)

Phase sequence control relay for three phase models

The water circuit comes complete with:

  • Circulator for the 0011÷0061 models and centrifugal for the 0071÷0121 models, plant side
  • Circulator for the 0011÷0091 models and centrifugal pump for the 0101÷0121 models, hot water side
  • Modulating valve to reduce water consumption (source side).
  • Safety valve
  • Expansion tank
  • Manual filling assembly
  • Drain valve on both the plant and the source circuits.
  • Pressure gauge
  • Air vent valve
  • Differential pressure switch on source side and system side

Accessory

  • Wired room terminal with backlit display, and with temperature and umidity probe
  • Extension module for system configuration
  • Electric heater of integration for the heating system
  • Electric heater for hot water cylinder, of integration and for anti-legionellosis
  • Cascade management kit
  • Serial card RS485 for ModBus
  • Buffer tank 35, 100, 200 liters
  • Hot water cylinder 300, 500 liters
  • 300 liters thermal store for domestic hot water, for DOMH2O kit
  • 300, 500, 1000 liters thermal store for domestic hot water with solar heat exchanger, for DOMH2O kit
  • DOMH2O15 e DOMH2O24 kit for domestic hot water with external plate heat exchanger and pump