Pilot's Operating Handbook
Section 7
Description
Edition 0 - March 05, 2019
Rev. 2
Page 7.10.6
Dual zones Environmental Control System (ECS)
The ECS ensures both Cockpit and Cabin heating and cooling functions.
The ECS consists of two independent air circuits :
-
Heating circuit, controlled by Temperature Conditioning System (TCS)
-
Cooling circuit, controlled by Vapor Cycle Cooling System (VCCS)
Heating circuit
The TCS regulates hot air coming from the bleed air system (also used for
pressurization) and mixes it with the recirculating cabin air at the Mixing Ejector
(MIXEJ) in order to lower the delivered air temperature.
The resultant air flow enters the Hot Air Distributor (HAD) and is distributed in the
cockpit / cabin zones depending on the demand.
The air is distributed :
-
into the cockpit zone through :
.
ports located on pedestal sides,
.
ports under each seat or
.
the demisting outlets.
-
into the cabin zone through :
.
ports located on the lower section of the L.H. side and R.H. side cabin
upholstery.
Cooling circuit
The VCCS is selected on only when the GASC receives a cooling request. It is
composed of two independent circuits :
-
one for the cockpit zone
-
one for the cabin zone
For each circuit, air is sucked by means of a variable speed electrical fan and then
blown through an evaporator and ducted to the different zones :
-
cockpit circuit, by passing through :
.
the upper panel equipped with swivelling and adjustable air outlets,
.
air outlets located on arm rests of pilot and R.H. side front passenger
stations and
.
ports located under instrument panel.
PIM - DO NOT USE FOR FLIGHT OPERATIONS