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from the heaters.
System test is accomplished using the SYSTEM 1 & 2 TEST switchlight on the Flight
Attendants panel as follows:
Latch the FAN and HTR 1 and 2 switchlights and check that:
S The FAN and HRT 1 and 2 lights illuminate green.
Press the TEST switchlight and hold; check that:
S The FAN FAIL and HTR 1 and 2 INOP lights illuminate (amber), and
S The FAN and HRT 1 and 2 green lights go out.
Release the TEST switchlight and check that:
S The HTR 2 INOP light goes out, and
S The FAN FAIL and HTR 1 INOP lights remain ON.
Unlatch the FAN and HTR 1 and 2 switchlights and check that:
S All galley heating panel lights are off.
REV 56, Jan 31/03
Vol. 1 08--50--2
ENVIRONMENTAL CONTROL SYSTEM
Lavatory and Galley Ventilation System
Flight Crew Operating Manual MASTER
CSP A--013
Galley Heating System
Figure 08---50---1
GALLEY
GASPER
GALLEY
CEILING
EXHAUST
INLET
GALLEY
WARM
AIR OUTLET
SERVICE
DOOR
GALLEY EXHAUST FAN
GALLEY
HEATER
No. 1
GALLEY
HEATING
FAN
FWD CABIN AIR
OUTLET (AISLE)
RIGHT GASPER
DUCT
RH
WINDSCREEN
HEATER
GALLEY AIR No. 2
OUTLET
CABIN
FLOOR
LINE
RH
FWD
CABIN
EXHAUST
DUCT
IN
SIDEWALL
FLIGHT
COMPT
BULKHEAD
Vol. 1 08--50--3
REV 56, Jan 31/03
ENVIRONMENTAL CONTROL SYSTEM
Lavatory and Galley Ventilation System
Flight Crew Operating Manual
CSP A--013
MASTER
Galley Heating System --- Control Switches
Figure 08---50---2
Forward Attendant’s Panel
HTR 1 (green)
INOP (amber)
Activates the underfloor
heater and fan.
FAN (green)
FAIL (amber)
Activates the fan only.
HTR 2 (green)
INOP (amber)
Activates the bin
heater.
(RH PACK on)
TEST
Tests HTR 1 and
HTR 2 systems.
REV 56, Jan 31/03
Vol. 1 08--50--4
ENVIRONMENTAL CONTROL SYSTEM
Lavatory and Galley Ventilation System
Flight Crew Operating Manual MASTER
CSP A--013
A. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
Galley
Heater #1,
Heating Heater #2 and GALLEY HTRS AC BUS 2 2 B11
Fan
Vol. 1 08--60--1
REV 56, Jan 31/03
ENVIRONMENTAL CONTROL SYSTEM
Pressurization System
Flight Crew Operating Manual
CSP A--013
MASTER
1. PRESSURIZATION SYSTEM
The aircraft is pressurized by bleed air supplied by the air-conditioning system. Cabin
pressure is normally controlled by regulating cabin air overboard through two outflow valves
located on the rear pressure bulkhead. The outflow valves are automatically controlled by
either of two independent cabin pressure controllers. The pressurization is almost totally
automatic, the crew only has to set the landing field elevation, on the CABIN PRESS control
panel, to program the system for flight. If the normal automatic mode fails, the outflow
valves can be controlled manually by controls on the CABIN PRESS control panel. Both
valves also operate as safety valves to provide overpressure and negative pressure relief. If
cabin altitude exceeds 14,000 feet, a signal is sent to the passenger oxygen system to
deploy the oxygen masks. A cabin pressure acquisition module (CPAM) is used in the
system to supply signals to the EICAS.
REV 56, Jan 31/03
Vol. 1 08--60--2
ENVIRONMENTAL CONTROL SYSTEM
Pressurization System
Flight Crew Operating Manual MASTER
CSP A--013
Pressurization Control System --- Schematic
Figure 08---60---1
Vol. 1 08--60--3
REV 56, Jan 31/03
ENVIRONMENTAL CONTROL SYSTEM
Pressurization System
Flight Crew Operating Manual
CSP A--013
MASTER
Pressurization Control Panel
Figure 08---60---2
Manual Cabin
Altitude Regulators
Used to control
pressurization system
in manual (pneumatic)
mode.
MAN ALT selector is
used to change cabin
altitude manually:
UP -- causes outflow
valves to open and
increases cabin
altitude. When selected
cabin altitude is
acquired, select
middle/centre position.
DOWN -- causes
outflow valves to close
and decreases cabin
altitude. When selected
cabin altitude is
acquired, select
middle/centre position.
Middle/Centre
position--Disables all
previous manual
selections.
Cabin Pressurization
Overhead Panel
Selector Panel
Pressurization Control Switch/Light
　
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