1. ARAC/H/F Air-cooled water chillers, free-cooling chillers and heat pumps Range: 120-260kW

3. Range

4. Range

5. Layout – Macro Components
Simple maintenance and installation of components
Easily accessible
electrical panel
Simple replacement of
components (access
from 3 sides)
Protected user
terminal
Anti-vibration supports to avoid vibrations inside the unit

6. Layout – Macro Components
Fans
Condensing section
Shell & tube evaporator
Water tank
Expansion receiver (24 l - 10 bar max)
Circulation pump
Electrical panel

7. Layout – Macro Components
Temperature sensor H2O inlet
Second temperature sensor H2O outlet
Differential pressure switch
Pump shut-off tap
Temperature sensor H2O outlet
Check valve

8. Accessible dehydration filters
Layout – Macro Components
Scroll Compressors
in tandem
TWIN SYSTEM
Expansion valve
Expansion valve
Accessible dehydration filters

9. Layout – Macro Components
Main characteristics of the hydraulic section:
The check valve is downstream from the pumps: this allows easy replacement in the event of pump installation.
1 or 2 circulation pumps (1+1 in stand by) with automatic control
Options:
2 possible configurations: standard & high
pressure (150 and 300 kPa)
Water tank and expansion receiver with safety valve
Anti-freeze heaters
Algorithm regulation of the inlet water temperature

10. Cooling circuit
All of the units are equipped with 4 identically sized compressors placed in parallel in pairs on two refrigerant circuits. For this reason the circuits and the compressors are independent from each other.
4 steps at any given time
elevated efficiency at partial loads
optimum modulation of the cooling capacity supplied by the unit

11. Compressors
All of the models are equipped with four rotary SCROLL compressors, connected in tandem.
All of the models have two independent refrigerant circuits, guaranteeing at least 50% of the cooling capacity in the event of problems with one of the two circuits as well as elevated energy performance at partial loads.
Electronic protection device on each compressor
Internal check valve on the compressor discharge
Rubber anti-vibration supports
OPTIONS:
Compressor discharge tap
A cover and other solutions which make the unit Low Noise

12. Cooling circuit Composed of two independent refrigerant circuits
Expansion valve with internal equalisation
Accessible dehydration filters
Valve on the liquid line and liquid sight glass with humidity sensor
OPTIONS:
High and low pressure gauges (onboard)
High and low pressure transducers

13. Fans
The units are equipped with axial fans which have a diameter of 800 mm.
There are between 2 and 4 installed on each unit.
They are directly coupled to the electric rotary motor which regulates the speed by means of modulating the power supply.
If it has been requested, modulating control of the condensing temperature is available with cut off regulation of the fan speed.

14. Condensing coils
All of the units are designed to work with maximum external temperatures of up to 45°C.
Each unit features two coils which are placed vertically
Copper piping and collection trays and aluminium fins (pitch 1.8 mm)

15. Evaporator Removable Shell & Tube chilled water exchanger:
Two gas circuits and a single hydraulic circuit which is able to operate with low head losses
The exchanger is completely insulated with closed cell expanded polyurethane to prevent the formation of condensation and to limit thermal dispersion
Equipped with anti-freeze sensors
OPTIONS:
Anti–freeze heaters around the evaporator
Hydraulic connection Kit (standard on units with pumps, water tank and ARAF)

16. ARAC/H/F Air-cooled water chillers, free-cooling chillers and heat pumps Range: 120-260kW