Aircooled chiller Blue Box Zeta 80 kW
- Brand: Bluebox
- Power: 80 kW
- Year: 2007
| Power | 80 kW (12/7 — 35°C) |
| Year of manufacture | 2007 |
| Type of refrigerant | R407C |
| Refrigerant circuit | 1 pc. |
| Compressors | 2 pcs. Danfoss (scroll) |
| Number of fans | 2 pcs. |
| Hydraulic module | 2 pcs. pump Lowara, buffer tank, expansion vessel |
| Dimensions | 3.26x1.1x1.9 m. |
| Weight | 868 kg. |
| Condition | excellent |
Air-cooled liquid chillers with hermetic scroll compressors and plate type evaporator, suitable for outdoor installations.
The unit has a refrigerant circuit for each pair of compressors.
UNIT FRAME
Self supporting frame with removable panels, internally coated with expanded polyurethane sound-absorbing
material; constructed from galvanized sheet steel with RAL 5014 powder paint baked at 180°C to provide a
durable weatherproof finish. Threaded fasteners in stainless steel.
COMPRESSORS
Hermetic scroll type with orbital motion, connected in tandem and equipped with oil level sight glass, Klixon
internal thermal protection and oil equalisation line.
The compressors are housed in a sound insulated compartment and separated from the air flow; access is
provided by removable panels which allow maintenance work to be performed in safety even when the unit is in
operation.
CONDENSER
Composed of a high efficiency coil manufactured from copper tubes and aluminium fins.
The finned coil is protected by a metal grille which is installed as standard.
CONDENSER FANS
Axial fans directly coupled to 6 pole motors with internal Klixon overload protection.
Motor protection category is IP 54. The fan is equipped with a safety grille to UNI EN 294.
EVAPORATOR
Brazed plate type in 316 AISI stainless steel. Thermal insulation of evaporator is provided by closed cell expanded
material. Each evaporator is equipped with a low water temperature probe for freeze protection and each unit is
equipped as standard with a mechanical flow switch.
REFRIGERANT CIRCUIT
Comprising: liquid valve, charge connection, liquid sight-glass, filter/dryer, thermostatic expansion valve with
external pressure equalisation, high and low pressure switches for 2-compressor models.
For 4-compressor models high and low pressure values and relative condensation and evaporation temperatures
are measured by pressure transducers that relay the signals to the controller so that they can be read directly on
the display. The high pressure side of the circuit is equipped with high pressure switches and relief valves.
ELECTRICAL PANEL
The electrical panel includes:
– main switch
– thermal magnetic circuit-breakers for fans and (if present) pumps; compressor fuses for the power circuit
– compressor contactors
– fan contactors
– pump contactors (ST version)
The microprocessor controls the following functions on all units:
– water temperature regulation
– freeze protection
– compressor time intervals
– compressor start sequence and automatic lead/lag selection
– alarm reset
– common alarm contact for remote signalling
– operating and alarm indicator LEDs
-LCD display of the following information:
– water inlet and outlet temperature
– programmed temperature set-point and differential
– alarms description
– compressor hours run meter
