SIGILUS CONDENSING UNITS

Air-cooled packaged condensing units in a low-noise axial construction in mechanical, electronic and multiservice versions.

Tropicalized design for high ambient temperature up to 50ºC.
Low noise condensing units with low speed fans.
Thermostatic expansion valve.

VERSION N: ELECTRONIC
The electronic version of Sigilus condensing units feature a XWING electronic controller to manage the condensing unit and the evaporator built-in solenoid valve as an option.

VERSIÓN M: MECHANICAL
The mechanical version is designed for on/off operation depending on the suction pressure (pump-down).

VERSIONES V: MULTISERVICE WITH VRC SYSTEM
The multiservice version features VRC system to adjust the refrigerant flow to the demand of the evaporators, keeping the pressure constant in suction the line.

VERSIONES S: SCROLL
Designed with scroll compressors.

– R134a / R404A / R449A refrigerant.
– Reciprocating hermetic or scroll compressor, acoustically insulated, with discharge muffler, mounted on shock absorbers, with internal klixon and crankcase heater.
– Large surftace condenser coil, copper pipes and aluminum fins, tropicalised for ambient temperature up to 50 °C.
– Low rpm motor fans, mounted on nozzles dynamically balanced propellers and external protection grilles.
– Refrigeration circuit equipped with high and low pressure switches, ceramic filter and sight gauge.
– Digital control of condensing pressure.
– Variable speed axial fan for proportional condensation pressure control (three-phase models).
– Full control and power board with compressor and motor fan protection.
– Electronic regulation with control pad (version N).
– Built-in oil separator (version V).
– Liquid injection system for negative temperature models with R449A.

Sigilus units incorporate triple noise insulation as standard:
– Insulated compressor compartment separated from air flow.
– Acoustic compressor jacket and discharge muffl er.
– Low-noise and low-speed fans, mounted on shock absorbers.

Optional

  • Change to 400 V-III-50 Hz power supply. *
  • Built-in oil separator (already included for V version).
  • Proportional condensation control by fan speed variation (monophase models).
  • Built-in solenoid valve (only for -N and -M version).
  • Anti-corrosion coil coating.
  • Coil protection grille.

BUILT-IN OIL SEPARATOR(Optional):
Sigilus condensing units connected to a single evaporator usually require an oil separator. This is recommended for long pipe lengths (> 30 m) being necessary for a suitable circuit design to ensure oil return.

PROPORTIONAL CONTROL OF CONDENSING PRESSURE
Proportional control of condensing pressure, for prolonged operation at under low ambient temperature, standard for Sigilus series (option for -N versions).

SERIE MDH-V & MDF-V. VRC SYSTEM

Multiservice version, featuring VRC Variable Refrigerant Capacity System, of the condensing units is specifi cally designing for the centralisation of cooling production of several evaporators:
– Suction pressure valve (VP).
– By-pass pressure valve (VC).
– Thermostatic expansion valve for liquid injection (VE).
– Pressure control switch (IP).
Multiservice versions of condensing units:
Intarbox horizontal centrifugal for several services:
– MDH-CV/-V and BDH-CV/-V series.
Sigilus low-noise axial for several services:
– MDF-V and BDF-V series.

VRC system: Variable Refrigerant Capacity
The VRC system applied to a reciprocating hermetic compressor adjusts the flow of refrigerant to the evaporator unit’s demand by maintaining constant pressure in the suction line.
The VRC system is composed of a set of pressure and temperature valves capable of progressive variation of a compressor’s cooling capacity between 100 % and 10 % of this rated power, at the sames time the system reduces electrical input power and protects the compressor, maintaining its compression ratio within security margins, eliminating the risk of overheating.

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