MIL'S SEC 7HC Notice De Mise En Service Et D'entretien page 21

PROCOM 2 or CYCLIC 2020 regulation - SEC 7HC air treatment type
2 DESCRIPTION of an air plant HOSPITAIR CABIN
2.1 Schematic diagrams
2.1.1 11 bar Version
2.1.2 15 bar Version
On this schematic diagram, the receiver is illustrated in a version where the flow passes
through the receiver with a second receiver connected in parallel. The versions, flow bypass
receiver or receiver with a single by-pass, are also available
519015-15
HOSPITAIR CABIN (MV) – 11 & 15 bar
2.2 Description of the Air Production Assembly Architecture
The air is sucked in by the compressor through the air filter then is compressed and
injected through the cyclone/filter fitted with an electronic air vent valve with an alarm
contact. This one is used to trap the effluents before it enters the air treatment unit.
The pressure sensor of the compressor permanently controls the pressure before the
air treatment unit.
Then the air enters the air treatment unit (see the description in the manual concerning
the air treatment unit).
At the air treatment unit output, the air enters a manifold which supports the following
items:
• PS: standby mechanical pressure switch of the regulation sensor,
• C1A: regulation sensor read by the PROCOM-2 or CYCLIC 2020,
• S1A: hygrometry probe.
For HOSPITAIR CABIN 15 bar version, the air is then stored in the receiver and then goes
through the simple pressure release line [one pressure regulator + one particle filter
PAR] (for Cabin with one compressor) or duplex parallel pressure release line [two
pressure regulators + two particle filters PAR] (for Cabin with two compressors).
For HOSPITAIR CABIN 11 bar version, the air is then stored in the receiver and then goes
through the simple final filtration [one particle filter PAR] (for Cabin with one
compressor) or duplex parallel final filtration [two particle filters PAR] (for Cabin with
two compressors).
For duplex version, the air enters in two sets at the same time and each set can be "by-
passed" for the maintenance operations with isolating valves.

an analysis connector, to check the quality of the generated air.

a network alarm sensor connector (C2A sensor).
2.3 Description of the Air Production Assembly Operation
Regulation is available either with PROCOM-2 or with CYCLIC 2020.
When the sensor C1A reaches 9 bar (11 bar version) / 10 bar (15 bar version),
compressor A is forced into operation for a pre-set period of time. This forced
operation time is called the FLEXO time.
The discharge system of the compressor is disabled and the cycle of air dryer A is started.
2.3.1 During the FLEXO time:
The compressor is still operating, whatever the pressure at C1A. The pressure can
exceed 9.5 bar (11 bar version) / 12.5 bar (15 bar version). If the pressure sensor of the
compressor reaches 11 bar (11 bar version) / 14.5 bar (15 bar version), the compressor
discharge system is enabled in order not to go over 11 bar (11 bar version) / 15 bar (15
bar version), then at 9.5 bar (11 bar version) / 13 bar (15 bar version), the discharge
system is disabled again and the pressure starts rising again, and so on an so forth...
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