Western Zeta Rev HE FC, Принцип работы и управление

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DESCRIPTION OF ACCESSORIES
Refrigerant circuit accessories
The "(S)" symbol indicates that the option is present as standard in the unit, provided this is not in conflict with other
selected accessories.
BK Brine Kit
This accessory is compulsory if a water temperature set point lower than +3°C is used (if the unit is provided
with double set point or variable set point, the lower set point is considered).
The accessory consists of increased insulation and suitable sizing and calibration of some components.
The inlet and outlet temperatures of the user-side exchanger must be given on ordering to allow correct set-
ting of the alarm parameters and verification of the sizing of the expansion valve.
The cooling set point can then be changed by the customer in an interval that, compared to the set point given
on ordering, ranges from -1K up to the maximum temperature allowed by the above-stated operating limits.
The unit will be optimized to work at the set point temperature given on ordering. For different set points, the
cooling capacity provided and the level of efficiency of the machine could decrease and move away from these
conditions.
MAFR Pressure gauges
The operating pressures of each circuit of the unit can be displayed on the control by accessing the relevant
screens. Also, the machine can be fitted with pressure gauges (two for each circuit) installed in a clearly visible
position. These allow reading in real time of the working pressures of the refrigerant gas on the low pressure
side and on the high pressure side of each refrigerant circuit.
RG Fan speed adjuster (S)
The control manages the speed of the fans through a phase cutting speed governor, in order to optimize the
operating conditions and efficiency of the unit.
For units equipped with EC fans, the same function is carried out using the electronically commutated motor
of the fans and is supplied as standard.
RIC Liquid receiver
The adoption of this accessory always guarantees correct feeding of the expansion valve even when the unit
is subjected to wide external air temperature ranges.
RPP Refrigerant leak detector with automatic pump down
With this accessory, a refrigerant leak detector is placed inside each compressor compartment. Detection of a
refrigerant leak is managed by the control through a specific alarm and display of a specific icon on the display
of the control. For all the circuits of the unit, the alarm also starts the machine stopping procedure with pump
down, confining all the refrigerant in the coils.
The accessory includes the capacitive backup battery.
The accessory can be applied only to units in LN or SLN set-up.
RPR Refrigerant leak detector
With this accessory, a refrigerant leak detector is placed inside each compressor compartment. Detection of
a refrigerant leak is managed by the controller through a specific alarm and display of a specific icon on the
display of the controller. This alarm stops the unit.
The accessory can be applied only to units in LN or SLN set-up.
RUB Compressor suction and delivery valves
The valves situated on the delivery side and on the suction side of the compressors allow the compressor to
be isolated from the rest of the refrigerant circuit, so making the maintenance operations quicker and less
invasive
VS Liquid line solenoid valve
This accessory prevents refrigerant migration that could damage the compressor on starting.
VTE Electronic expansion valve
The use of this component is particularly advisable on units operating in very variable heat load or operating
mode conditions, as in the case of joint management of air conditioning and high temperature water produc-
tion. The use of an electronic thermostatic valve allows you to:
• maximize heat exchange at the evaporator
• minimize response times to changes in load and operating conditions
• optimize control of overheating
• ensure maximum energy efficiency