![Laversab 6600-NG Скачать руководство пользователя страница 11](http://html1.mh-extra.com/html/laversab/6600-ng/6600-ng_user-manual_3905006011.webp)
6600-NG User’s Manual
125-9110A
Page 11
In the event that the 6600-NG is in-operable due to a malfunction or due to loss of power, it is possible to vent
the Ps2 system manually. This is done using the metering valve labeled “Ps2 Cross-bleed”. This valve is a
positive shut-off valve. Opening this valve slowly will equalize the pressure between the Ps2 and Ps1
systems (causing the differential between Ps1 and Ps2 to be at zero).
Since opening this valve transfers pressure from the Ps2 system into the Ps1 system of the aircraft, while
opening this valve, care must be taken to vent the Ps1 system simultaneously (if necessary), to prevent the
altimeter in the aircraft from going below (minus) -1000 feet. Also, care must be taken not to exceed the
maximum value of the Climb indicator in the aircraft.
Once Ps2 pressure is almost equal to Ps1 pressure, this valve must be opened completely, to ensure that the
differential stays near zero while the Ps1 system is vented to ambient (using the “Ps1 Vent” valve).
Caution:
This valve is for emergency use only and should not be used during normal operation. When
emergency venting is completed, this valve should be closed immediately.
Caution:
This valve should not be tightened
at all
past its stop. It seals before it hits the stop. Even
finger-tight beyond the stop may damage the seat of the valve, causing it to leak constantly.
[9]
Emergency Vent-Valve, “Ps1 Vent”:
In the event that the 6600-NG is in-operable due to a malfunction or due to loss of power, it is possible to vent
the Ps1 system manually. This is done using the metering valve labeled “Ps1 Vent”. This valve is a positive
shut-off valve. Opening this valve slowly will vent the Ps1 output of the 6600-NG to ambient pressure.
While venting, care must be taken not to exceed the maximum value of the Climb indicator in the aircraft.
Also, before venting the Ps1 system to ambient, the “Pt Cross-bleed” and “Ps2 Cross-bleed” valves must be
opened completely to ensure that airspeed is zero and there is no differential pressure on Ps2.
Caution:
This valve is for emergency use only and should not be used during normal operation. When
emergency venting is completed, this valve should be closed immediately.
Caution:
This valve should not be tightened
at all
past its stop. It seals before it hits the stop. Even
finger-tight beyond the stop may damage the seat of the valve, causing it to leak constantly.
[10]
Ps1 port :
The Ps1 port of the tester is provided with a #4-AN fitting. This port must be connected through a hose to
the Ps1 port of the aircraft. The hose must be connected after performing the Self Test on the 6600-NG. The
hose, once connected, must not be disconnected while the aircraft Ps1 system is not at “Ground” level.
Caution:
Do not connect the Ps1 hose to the Ps1 port before performing the Self Test.