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AUTOMATIC MODE -
Operating Range MANUAL MODE -
Operating Range
14.5bCto 28bC(58bFto 82bF) 1.7bCto 71bC(35bF to 160bF)
NOTE
Manual mode temperature below 3bC(37bF) may result in icing of the pack water separator and subsequentcycling ofthepackoutput.
C. Ram Air Ventilation
The cooling air fortheleftand rightheat exchangers is suppliedfromaramairintake, located on theupperaftfuselage. During normaloperation,the ramairis exhausted through anexhaustductin theloweraftfuselage,afterpassing over theheat exchangers. The ram air intakeduct also providescooling airtothehydraulic systems heatexchangerto coolthehydraulic fluid.(RefertoChapter14).
Ram air ventilation is usedonly whenthe air conditioningpacks fail(unpressurized). Operatingthe(guarded)RAMAIR, switchlight ontheair-
conditioningpanel, opensthe normally closed ram air valve. Ram air thenenters theleft(flight compartment) supply system. Ram air also flows throughthedistribution manifoldtothepassenger compartment.
D. Conditioned Air Distribution
Conditionedair, from theleftand rightair-conditioningpacks,is routedthrough separateductingsystemsthrough adistribution manifoldtotheflight compartmentand thepassenger compartments.
Conditionedair, tothepassenger compartment,is distributedfrom ductsalong each sideofthe aircraft. Passenger compartment exhaust airis routedunderfloor tothe outflow valves ontheaftpressure bulkhead.
Conditionedair, to theflight compartment,is distributedtothe side console panels, gaspers andvents, andavionics units within theinstrumentpanel. Dedicatedfans and ductsdirect conditionedair over theflight compartmentdisplayunits. Flight compartment exhaust air is routedunderfloorthroughthe avionics compartmenttothe outflowvalve attheaftpressure bulkhead.
Flight Crew Operating Manual MASTER
CSP A-
013
ENVIRONMENTAL CONTROL SYSTEM Air-
Conditioning System Vol. 1 08-
20-
10
REV 56, Jan 31/03
E. Low Pressure Ground Air Connection <0007>
Anexternalgroundair connector, located on the rightaftfuselage,is providedfor groundair-conditioning. Lowpressure compressed airfrom agroundairconditioning cart can be supplieddirectlyintoflightandpassengercompartmentdistribution systems.
F. System Circuit Breakers 1. AVIONICS COOLING SYSTEM
SYSTEM SUB-
SYSTEM CB NAME BUS BAR CB PANEL CB LOCATION NOTES
Air C diti iConditioning -
Flight Compartment Left Pack L AIR COND UNIT DC BUS 1 11 J1
C k itCockpit Temperature Control CKPT TEMP/CONT J2
CKPT TEMP/CONT MAN J3
CKPT FAN AC BUS 1 C8
Ram Air RAM AIR SOV DC BAT 22 P5
AiAir
Conditioning -
Cabin Right Pack R AIR COND UNIT DC BUS 2 J1
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