R.A.I. Approval Letter 97/3147/MAE
dated 30 July 1997
The information contained herein supplements the information of
the basic Rotorcraft Flight Manual.
For limitations, procedures and performance data not contained
in this appendix, consult the basic Rotorcraft Flight Manual.
ENVIRONMENTAL CONTROL SYSTEM
(AIR CONDITIONING)
The Environmental Control System (ECS) P/N 109-0811-43 consists of two
bleed-air shut-off valves, one pressure and regulating shut-off valve, pressure
and temperature switches, air conditioning unit, outside air intake and exhaust
duct, pilot and passenger area air outlets, connecting ducts and tubing, a circuit
switch and two control switches to operate the shut-off valves. The ECS
consists also of a cabin air recirculating system. A selecting valve, to reduce
the used bleed air, can be selected by an economy mode selector switch.
Bleed air and outside air are fed into the air conditioning unit where a
temperature control sensor, set by a control knob (electrically connected to a
temperature control system), determines the mixing ratio and the extent to
which the air is then cooled to produce the desired temperature.
The system is provided with an overtemperature switch.
NOTE
When the economy mode selector switch is in ECON position the
quantity of bleed air from the engines is less.
RFM A109E
APPENDIX 5
Page1of23
Rev. 44
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