飞行翻译_公务机_公务航空_Business Jet_Business Aviation

With the TRIM AIR ON and the air conditioning PACKS in AUTO, the ACSC modulates the Temperature Control Valve (TCV). The TCV bypasses hot air around the pack to mix with the cool air at the Air Cycle Machine (ACM) turbine outlet, to control pack discharge temperature.
TO MIXING
PACK DISCHARGE
MANIFOLD
TEMPERATURE

PACKS AUTO
In AUTO mode, the temperature is controlled between a minimum of 3°C to a maximum of 70°C.
GF0210_028
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual Volume 2

The TRIM AIR switch in the ON position, opens the Hot Air Shutoff Valves (HASOV) and the ACSC modulates the cockpit, forward and aft trim valves.
Cockpit Trim
 Valve

Valve
Forward Trim

Aft Trim
 Valve

GF0210_029
HASOV
The TRIM AIR switch, when selected in the OFF position, closes the Hot Air Shutoff Valves (HASOV) and the ACSC closes the cockpit, forward and aft trim valves.

NOTE
In the event of a single ACSC failure (both channels), the trim air valve(s) on the affected side will not be controlled. Select the trim air switch to OFF.
In the event of a dual ACSC failure, operate the packs in MAN.

GF0210_030a
GF0210_031
Volume 2 Flight Crew Operating Manual Rev 12, Aug 14, 2006
In the event of loss of all automatic control, the cooling pack can be manually controlled by the crew, by selecting the PACK control selector to MAN. The temperature is controlled by the HOT/COLD toggle switches located on the BLEED/AIR CONDITIONING control panel.

GF0210_032
The TCV opening is controlled by the toggle switches, which control the packs discharge temperature. During manual operation, the crew should monitor the pack discharge temperatures to ensure that the temperatures remain in acceptable limits. A minimum of 5°C to avoid ice build up and a maximum of 60°C for passenger comfort, are recommended.

HOT/COLD Toggle Switches
Selecting the spring-loaded toggle switch to HOT or COLD will control temperature of PACK discharge through the TCV, when PACK control is selected to MAN.

Rev 12, Aug 14, 2006 Flight Crew Operating Manual Volume 2

AIR CONDITIONING AND PRESSURIZATION

NOTE
To avoid "overshooting" desired temperature, do not toggle for more than two seconds duration.
GF0210_034a
Air Conditioning Bleed Leak Detection
When a leak is detected, a message is displayed on EICAS and the BMC will automatically close the affected FCV, PRV, XBLEED, and the LCV to isolate and stop the leak.

Volume 2 Flight Crew Operating Manual Rev 12, Aug 14, 2006

Conditioned air is routed from the cooling packs to the mix manifold. The mix manifold also receives recirculated air from the passenger cabin.
TO TO TO
 AFT COCKPIT FWD
CABINCABIN