Air cooled mini chiller (heat pump) 

STANDARD UNIT SPECIFICATIONS

COMPRESSOR

Hermetic orbiting scroll compressor complete with motor over-temperature and over-current devices and protection against excessive gas discharge temperature. Fitted on rubber antivibration mounts and complete with oil charge. A oil heater is automatically switched on at the compressor shut-down to prevent oil dilution by the refrigerant.

STRUCTURE

Panels and bedplate are made from coated galvanized steel to ensure total resistance to atmospheric agents.

Side panels are easily removable and allow complete access to unit components.

Internal sound proof lining reduces sound pressure levels.

INTERNAL EXCHANGER

Direct expansion heat exchanger, braze-welded AISI **6 stainless steel plates with large exchange surface and complete with external heat and anticondensate insulation.

 

The exchanger comes complete with

- Water flow switch on water side

EXTERNAL EXCHANGER

Heat exchange coil with aluminums fins and copper tubes in staggered rows. The coils are complete with integral sub cooling circuit, which assures the correct refrigerant feeding of the expansion valve.

FAN

Low speed axial fan directly driven by single phase external rotor motor with incorporated thermal overload. Housed in aerodynamically shaped enclosures to increase the efficiency and reduce the noise level. Complete with fan guard in order to help against fortuitous contact with the blades.

 

REFRIGERANT CIRCUIT

The circuit is complete with:

- dehydrator filter

- high pressure switch

- low pressure switch

- liquid receiver

- thermostatic expansion valve with equalizer

- *-way reverse cycle valve

- non-return valve

 

ELECTRICAL PANEL

The Power Section includes:

- isolating transformer for auxiliary circuit power supply

- main line isolator switch

- compressor thermal overload relay

- compressor control contactor

- pump control contactor

- centrifugal pump motor protector

- fan speed controller

The control section includes:

- display of the set values and the error codes

- water antifreeze and high refrigerant gas pressure pre-alarm function that reduces cooling capacity to avoid unit shut-down

- compressor overload protection and timer.

- antifreeze protection

- Compressor timer / operation signal LED.

- possibility of communication with ZONE MASTER system (optional)

- proportional + integral water temperature control

- set point compensation with outside temperature probe

- relay for remote cumulative fault signal

- self-diagnosis system with immediate display of the error code

- ON/OFF and alarm reset s

- UP and DOWN s to increase and decrease the values

- display of the set values, the error codes and the parameter index

- compressor operating hour display

- remote ON/OFF control

- water pump control

- function and command s

 

HYDRAULIC CIRCUIT

- Water fill assembly with pressure gauge

- water side safety valve

- diaphragm expansion vessel

- impurity trap with filter

- Centrifugal pump

- drain valve

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