2 General description
2.1 Introduction
General
SF 2
+
, SF 4
+
and SF 6
+
are stationary, single-stage, oil-free compressors, driven by an electric
motor.
The compressors are controlled by a Touch controller. See section Controller for details.
The compressors are enclosed in a sound dampening enclosure and are air-cooled.
Available versions:
• The Pack version (P) comprises the motor, the compressor element, the air cooler, and the
regulation and protection components.
• The Full-Feature (FF) version is a Pack version, completed with an integrated refrigerant dryer
(ID).
The basic version, referred to as the floor-mounted version (FM), does not include an air receiver.
Available options:
• Air receiver of 30 l (7.93 US gal), 270 l (71.3 US gal) or 500 l (132 US gal). The 30 l receiver
consists of a module with three 10 l (2.64 US gal) receivers. The 30 l receiver option includes
an electronic drain.
• Electronic drain on the air receiver in the tank-mounted version (270 l and 500 l).
• Water separator on the outlet in floor-mounted Pack units.
• Pre-filter mats on the air inlet.
• Phase sequence relay on 3–phase units.
• Remote air intake.
• Full-Feature version: desiccant dryer (CD): for a dew point down to - 40 °C.
• Touch controller with a touch display. This option is useful if more than one compressor is
connected to the same air net. See section Controller.
Pack
A Touch controller module, fitted in the front panel, controls the compressor.
The electric components are located in the cubicle behind the front panel door.
A check valve (CV) prevents loss of compressed air when the compressor is stopped.
A temperature sensor and a safety valve (SV) protect the compressor element against overheating
and too high pressure respectively.
The compressed air is cooled by an air cooler (Ca).
Single-phase units are equipped with a vent valve for easy starting.
Instruction book
2920 7219 10 11
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