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Switching off the heat exchanger
1. Always wear protective gloves.
2. Close the directional control valve on the heat exchanger (position 0) → blue marking.
The oil/compressed air heat exchanger is circumvented by the bypass line and therefore is not
incorporated into the compressor oil circuit. Compressed air fed through the heat exchanger is
not reheated. Consequently, only “condensate-free compressed air” is available from the com‐
pressed air distributor.
8.6.1.2 Option da/dd/df
Selecting compressed air quality G or F
The following options can be selected for compressed air treatment:
■ Moisture-reduced, oil-free and reheated compressed air
→ Compressed air quality G
■ Moisture-reduced, oil-free compressed air
→ Compressed air quality F
Heat exchanger directional con‐
trol valve
Compressed air quality at
compressed air outlet
Compressed air quality symbols
I
Moisture-reduced, technically
oil-free and warm compressed
air
G
0
Moisture-reduced, technically
oil-free compressed air
F
I – directional control valve open; 0 - directional control valve closed
Tab. 51 Directional control valve position and selected compressed air quality
Switching on the heat exchanger
1. Always wear protective gloves.
2. Open the directional control valve on the heat exchanger (position I) → red marking.
The oil/compressed air heat exchanger is incorporated into the compressor oil circuit. Com‐
pressed air fed through the heat exchanger is reheated by the hot cooling oil from the com‐
pressor. “Technically oil-free, dry and warm compressed air” is available from the compressed
air distributor.
Switching off the heat exchanger
1. Always wear protective gloves.
2. Close the directional control valve on the heat exchanger (position 0) → blue marking.
The oil/compressed air heat exchanger is circumvented by the bypass line and therefore is not
incorporated into the compressor oil circuit. Compressed air fed through the heat exchanger is
not reheated. Consequently, only “technically oil-free and dry compressed air” is available from
the compressed air distributor.
8
Operation
8.6
Operating the options
No.: 902366 10 USE
Operator Manual Portable Rotary Screw Compressor
MOBILAIR M55 PE SIGMA CONTROL SMART pV
81