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- 2. Introduction
The function of the passenger cabin distribution system is to distribute
conditioned air to the passenger cabin.
The figure PASSENGER-CABIN DISTRIBUTION - SCHEMATIC
DIAGRAM provides further data on the preceding text.
AIRCRAFT
MAINTENANCE MANUAL
EFFECTIVITY:ALL
Embraer 190 - SDS 2327
21-22-00 Page 2 of 12
Rev 19 - Aug 04/14
Copyright © by Embraer S.A. All rights reserved – See title page for details.
- 3. COCKPIT PASSENGER CABIN
PRESSURIZED AREA
UNPRESSURIZED AREA
H−DUCT
(MIXING MANIFOLD)
TO CABIN
40%
TO
COCKPIT
60%
TO CABIN
50%
TO
CABIN
50%
TO GASPERS
AIR FLOW
FROM LEFT
PACK, LEFT
RECIRC. FAN,
RAM AIR OR
GND CART
AIR FLOW
FROM RIGHT
PACK, RIGHT
RECIRC. FAN,
RAM AIR OR
GND CART
EM170SDS210001A.DGN
PASSENGER-CABIN DISTRIBUTION - SCHEMATIC DIAGRAM
AIRCRAFT
MAINTENANCE MANUAL
EFFECTIVITY:ALL
Embraer 190 - SDS 2327
21-22-00 Page 3 of 12
Rev 19 - Aug 04/14
Copyright © by Embraer S.A. All rights reserved – See title page for details.
- 4. General Description
Air from the air conditioning packs outlets (AMM SDS 21-50-00/1) and
recirculated air from the recirculation system (AMM SDS 21-24-00/1)
enter a mixing manifold (H-duct). The air is then routed to the cabin
zones via air ducts.
The figure PASSENGER-CABIN DISTRIBUTION - COMPONENT
LOCATION provides further data on the preceding text.
AIRCRAFT
MAINTENANCE MANUAL
EFFECTIVITY:ALL
Embraer 190 - SDS 2327
21-22-00 Page 4 of 12
Rev 19 - Aug 04/14
Copyright © by Embraer S.A. All rights reserved – See title page for details.
- 6. Components
MIXING MANIFOLD (H-DUCT)
The mixing manifold, commonly referred to as H-duct, is a composite
duct which is used to mix pack outlet air and recirculated air before the
air is routed to the cabin zones.
AIR DISTRIBUTION DUCTS
The passenger cabin upper and lower ducts supply air uniformly along
the cabin.
The cross sectional area of the lower ducts is constant along the cabin.
The cross sectional area of the upper ducts changes in the interface
between the upper ducts and main ducts to reduce air velocity.
The ducts are made of composite material with low thermal
conductivity. They are installed in the sidewall panels (upper ducts) and
in the cargo compartment sidewall panels (lower ducts).
The figure PASSENGER-CABIN DISTRIBUTION - VIEW OF
COMPONENTS, Sheet 1 provides further data on the preceding text.
EFFECTIVITY: POST-MOD SB 190-21-0039/02
The figure PASSENGER-CABIN DISTRIBUTION - VIEW OF
COMPONENTS, Sheet 2 provides further data on the preceding
text.
AIRCRAFT
MAINTENANCE MANUAL
EFFECTIVITY:ALL
Embraer 190 - SDS 2327
21-22-00 Page 6 of 12
Rev 19 - Aug 04/14
Copyright © by Embraer S.A. All rights reserved – See title page for details.
- 8. THIS PAGE INTENTIONALLY LEFT BLANK
AIRCRAFT
MAINTENANCE MANUAL
EFFECTIVITY:POST-MOD SB 190-21-0039/02
Embraer 190 - SDS 2327
21-22-00 Page 8 of 12
Rev 19 - Aug 04/14
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- 9. A
B
A
ZONES
130
140
150
230
240
250
B
TO RH FWD CABIN
TO RH AFT CABIN
TO GASPER
TO LH AFT CABIN
TO LH FWD CABIN
FROM RECIRCULATION
FANS
RECIRCULATION
DUCTS
FROM ECS COOLING
PACK
RECIRCULATION
DUCTS
H−DUCT
PASSENGER
CABIN
DISTRIBUTION
DUCTS
EM170SDS210125B.DGN
PASSENGER-CABIN DISTRIBUTION - VIEW OF COMPONENTS – Sheet 2
AIRCRAFT
MAINTENANCE MANUAL
EFFECTIVITY:POST-MOD SB 190-21-0039/02
Embraer 190 - SDS 2327
21-22-00 Page 9 of 12
Rev 19 - Aug 04/14
Copyright © by Embraer S.A. All rights reserved – See title page for details.
- 10. Operation
Air from the pack outlet ducts mixed with recirculated air from the
recirculation fans is routed to the passenger cabin zone via distribution
ducts.
Air passages in the dado panels (on each side of the passenger cabin)
let the air return to the recirculation fans and to the outflow and
pressure relief valves.
The figure PASSENGER-CABIN DISTRIBUTION - BLOCK DIAGRAM
provides further data on the preceding text.
AIRCRAFT
MAINTENANCE MANUAL
EFFECTIVITY:ALL
Embraer 190 - SDS 2327
21-22-00 Page 10 of 12
Rev 19 - Aug 04/14
Copyright © by Embraer S.A. All rights reserved – See title page for details.
- 12. Training Information Points
The passenger cabin distribution ducts are installed in the aircraft with
tie-down straps. During removal/installation procedures you must use
an appropriate tool to install and tension the tie-down straps that attach
the cabin distribution ducts to the adjacent components and structure
supports. The ducts are made of composite material. If you do not
apply the correct tension to the tie-down straps, damage to the ducts
might occur.
AIRCRAFT
MAINTENANCE MANUAL
EFFECTIVITY:ALL
Embraer 190 - SDS 2327
21-22-00 Page 12 of 12
Rev 19 - Aug 04/14
Copyright © by Embraer S.A. All rights reserved – See title page for details.
