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DESCRIPTION OF ACCESSORIES
Some accessories may be incompatible with each other even if not expressly indicated.
Refrigerant
R134 R134a
Unit supplied with refrigerant R134a instead of R513A.
Refrigerant circuit accessories
VM2
Condensation control with 2-way modulating valve
The accessory includes the supply of a 2-way modulating valve complete with servo control to be installed
on the source-side hydraulic circuit (installation by the customer). The servo control is controlled via a 0-10V
signal from the control depending on the condensing pressure.
This accessory is to be used in applications where it is beneficial, when possible, to reduce the total flow rate
of water coming from the source (for example, when well water is used). When the unit reaches the setpoint,
the valve will be forced to close.
Accessory supplied loose.
VM3
Condensation control with 3-way modulating valve
The accessory includes the supply of a 3-way modulating valve complete with servo control to be installed
on the source-side hydraulic circuit (installation by the customer). The servo control is controlled via a 0-10V
signal from the control depending on the condensing pressure.
This accessory is to be used in applications where it is beneficial, when possible, to reduce the flow rate of
water sent to the source-side heat exchanger (for example, when water from a loop is used). When the unit
reaches the set point, the valve will be forced to total recirculation.
Accessory supplied loose.
SCU
Cumulative 0-10V signal for condensation control
This accessory requires a 0-10V output in the terminal board to carry out condensation control through a
device outside the machine (2-way valve, 3-way valve, inverter-controlled pump). The signal is linked to the
condensing pressure.
The signal is cumulative and therefore the accessory is suitable for combination on units in which there is a
single condensation control device located on the common branch of the source.
Incompatible with condensation control with modulating valve.
DVS
Double safety valve
With this accessory, instead of each individual safety valve per circuit, there is a "candelabrum" with two safety
valves and a diverter valve for choosing the valve in operation. This allows the safety valves to be replaced
without having to drain the machine and without having to stop it.
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.
RUBA Compressor suction valves
The valves situated 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.
The compressor discharge valve is standard on all compressors
RPP
Refrigerant leak detector with automatic pump down
This accessory includes a refrigerant leak detector. 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. For all the circuits of the
unit, the alarm also starts the machine stopping procedure with pump down, confining all the refrigerant in
the condenser.
Accessory as an alternative to Refrigerant leak detector.
