Vol. 1 08--00--1
REV 56, Jan 31/03
ENVIRONMENTAL CONTROL SYSTEM
Table of Contents
Flight Crew Operating Manual
CSP A--013
MASTER
CHAPTER 8 -- ENVIRONMENTAL CONTROL SYSTEM
Page
TABLE OF CONTENTS 08--00
Table of Contents 08--00--1
INTRODUCTION 08--10
Introduction 08--10--1
AIR-CONDITIONING SYSTEM 08--20
Air--Conditioning System 08--20--1
Packs 08--20--4
Temperature Control 08--20--9
Ram Air Ventilation 08--20--9
Conditioned Air Distribution 08--20--9
System Circuit Breakers 08--20--10
AVIONICS COOLING SYSTEM 08--30
Avionics Cooling System 08--30--1
System Circuit Breakers 08--30--8
AFT CARGO BAY VENTILATION SYSTEM 08--40
Cargo Compartment Air System 08--40--1
System Circuit Breakers 08--40--5
LAVATORY AND GALLEY VENTILATION SYSTEM 08--50
Galley Heating System 08--50--1
System Circuit Breakers 08--50--4
PRESSURIZATION SYSTEM 08--60
Pressurization System 08--60--1
Outflow Valves 08--60--7
Cabin Pressure Controllers 08--60--7
Automatic Pressurization Modes 08--60--7
Manual Pressurization Modes 08--60--8
Differential Pressure Control 08--60--9
Cabin Altitude Limitation 08--60--9
Emergency Depressurization 08--60--9
Cabin Pressure Monitoring 08--60--9
System Circuit Breakers 08--60--10
REV 56, Jan 31/03
Vol. 1 08--00--2
ENVIRONMENTAL CONTROL SYSTEM
Table of Contents
Flight Crew Operating Manual MASTER
CSP A--013
LIST OF ILLUSTRATIONS
INTRODUCTION
Figure 08--10--1 Simplified Block Diagram 08--10--2
AIR-CONDITIONING SYSTEM
Figure 08--20--1 Air Conditioning System 08--20--2
Figure 08--20--2 Air Conditioning Pack 08--20--5
Figure 08--20--3 Air Conditioning System -- Controls 08--20--6
Figure 08--20--4 Air Conditioning -- EICAS Messages 08--20--7
Figure 08--20--5 Air Conditioning System -- Synoptic
Page Indications 08--20--8
AVIONICS COOLING SYSTEM
Figure 08--30--1 Avionics Cooling -- CRT Display Supply 08--30--2
Figure 08--30--2 Avionics Cooling -- ARINC Supply 08--30--3
Figure 08--30--3 Avionics Cooling -- Controls 08--30--4
Figure 08--30--4 Avionics Cooling -- Exhaust System 08--30--5
Figure 08--30--5 Avionics Cooling -- EICAS Indications 08--30--6
Figure 08--30--6 Display Overtemperature Indications 08--30--7
AFT CARGO BAY VENTILATION SYSTEM
Figure 08--40--1 Cargo Compartment Air System with Air
Conditioning -- Schematic <0013><0034>< 0074> 08--40--2
Figure 08--40--2 Cargo Compartment Ventilation
System -- Schematic <0043><0053><0059> 08--40--3
Figure 08--40--3 Cargo Compartment Air/Ventilation System 08--40--4
LAVATORY AND GALLEY VENTILATION SYSTEM
Figure 08--50--1 Galley heating System 08--50--2
Figure 08--50--2 Galley heating System -- Control Switches 08--50--3
PRESSURIZATION SYSTEM
Figure 08--60--1 Pressurization Control System -- Schematic 08--60--2
Figure 08--60--2 Pressurization Control Panel 08--60--3
Figure 08--60--3 Pressurization -- EICAS Messages 08--60--4
Figure 08--60--4 Pressurization Synoptic Page Indications 08--60--6
Vol. 1 08--10--1
REV 56, Jan 31/03
ENVIRONMENTAL CONTROL SYSTEM
Introduction
Flight Crew Operating Manual
CSP A--013
MASTER
1. INTRODUCTION
The environmental control system (ECS) provides temperature and pressure regulated air
for heating, ventilating and pressurizing the flight and passenger compartments. Exhaust
air, from the compartments, is used to ventilate the avionics and cargo compartments,
before being dumped overboard through two outflow valves.
For ground operations, pneumatic air to operate the ECS can be obtained from:
S A ground air supply cart connected to the aircraft
S The auxiliary power unit (APU)
S Either or both engines.
During flight, the engines normally supply bleed air for operating the air-conditioning,
pressurization, and avionics cooling systems.
ECS warnings and cautions are displayed on the engine indication and crew alerting system
(EICAS) primary page. ECS advisory and status messages are displayed on the EICAS
status page. Views of the aircraft ECS temperature, pressure, valve positions and system
status indications are displayed on the EICAS ECS synoptic page.
REV 56, Jan 31/03
Vol. 1 08--10--2
ENVIRONMENTAL CONTROL SYSTEM
Introduction
Flight Crew Operating Manual MASTER
CSP A--013
Simplified Block Diagram
Figure 08---10---1
RAM
AIR
DISTRIBUTION MANIFOLD
LEFT
PACK
RIGHT
PACK
LP GROUND
CONDITIONED
AIR
OUTFLOW
VALVES (2)
AFT PRESSURE
　
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