Air-cooled water chillers
Air-cooled water chiller with axial fans for outdoor installation. The unit
is supplied with anti-freeze oil and refrigerant and has been factory
tested. On-site installation therefore just involves making connections
to the mains power and water supplies.
Unit charged with R407C ecological refrigerant.
STANDARD UNIT COMPOSITION
Frame comprising a base in polyester-painted hot-galvanised sheet
steel and supporting panels in Peraluman. The panels of the
compressor housing are covered by a layer of high density
sound-absorbing material. The self-supporting structure containing the
main components is designed to ensure maximum ease of access
during servicing and maintenance operations.
compressors
Hermetic scroll compressors. All the compressors are fitted with an oil
sump heater, electronic overheating protection with centralised manual
reset (thermal contact on size 0302) and a two-pole electric motor.
Water-refrigerant heat exchanger
AISI 316 steel braze-welded plate exchanger. The heat exchangers are
insulated with a closed-cell condensation proof lining in neoprene. A
thermostatically controlled electric heater prevents ice from forming
inside the evaporator when the unit is not working. When the unit is
working, it is protected by a differential pressure switch mounted on the
water side. The unit can work with antifreeze mixtures at exchanger
outlet temperatures as low as -8℃.
Refrigerant-air heat exchanger
Finned coil exchanger made from copper tubes and aluminium fins.
The aluminium fins are correctly spaced to guarantee optimum heat
exchange efficiency.
Fans
Axial electric fans, protected to IP 54, with external rotor and pressed
sheet metal blades. Housed in aerodynamic hoods complete with
safety grille. 6-pole electric motor with built-in thermal protection. The
fan chamber is divided into two sections. This improves efficiency with
partial loads as the fans of the idle circuit can be stopped.
Refrigerant circuit
Main components of the refrigerant circuit:
- compressor discharge and suction shut-off valve
- dryer filter,
- refrigerant line sight glass with humidity indicator,
- externally equalised thermostatic valve,
- high and low pressure switches.
Electric power and control panel
Electric power and control panel, built to EN 60204-1/EC 204-1 standards, complete with:
- control circuit transformer,
- general door lock isolator,
- automatic circuit breakers for compressors and fans,
- contactors for compressors,
- terminals for cumulative alarm block (BCA),
- remote ON/OFF terminals,
- spring-type control circuit terminal board,
- electric panel with double door and seals for outdoor installation,
- electronic controller.
- Control circuit numbered wires
- Pump control consent relay
- Fan speed continuous regulation
Basic model
Unit without heat recovery.
Model with partial heat recovery (D)
Air cooled chiller with partial heat recovery. Compared with the basic
configuration, this version features an additional refrigerant/water heat
exchanger on the gas delivery line. This heat exchanger, fitted in series
before the traditional cooling circuit condenser, is large enough to
recover heat for the production of medium-to-high temperature water
for domestic hot water and the like. The heating capacity of the heat
recovery circuit is approximately equal to the power input of the
compressor.
AVAILABLE VERSIONS
B (base)
Standard unit.
HT (High Temperature)
Version suitable for operation with high condenser input air
temperatures. This version features an oversized condensing section in
order to ensure that heat is correctly exchanged even in particularly
tough environmental conditions. As a result, when working at normal air
temperatures, an increase in cooling capacity and a decrease in power
input is obtained, thereby improving the cooling efficiency ratio
(E.E.R.).
SL (Super Low Noise)
Super low noise version. This configuration features special
soundproofing for the compressor chamber, reduced fan speed, an
oversized condensing section. Fan speed is automatically increased if
environmental conditions are particularly tough.
Accessories
Rubber isolators
Cu/Cu condensing coils
Condensing coils with epoxy-coated fins
Condensing coils with Fin Guard Silver treatment
Condensing coil protection grilles
230/3/50 power supply
Remote keyboard
Phase sequence relay
Connecting kit to HPGA (supplied separately)
Evaporator steel filter kit (supplied separately)
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