AIR CONDITIONING -PACK CLG AND MIX MANIFOLD TEMP CTRL -CONDENSER/REHEATER
EFFECTIVITY BEJ ALL 21-52-00
Page 15
D633W101-BEJ Jan 05/2002
AIR CONDITIONING -PACK CLG AND MIX MANIFOLD TEMP CTRL -WATER COLLECTOR AND SPRAY NOZZLE
Purpose
The water collector removes water from pack air. The spray nozzle sprays the water into the air in the ram air inlet duct. The overflow lets water dump directly into the ram air inlet duct if the water collector has too much water in it.
Physical Description
The water collector is a device with no movable parts. Internal vanes are set to push air into a circular flow.
The spray nozzle has no moving parts. The nozzle has these parts:
*
Pintle
*
Nozzle
*
Housing
*
Water drain line connector.
Location
A water collector and spray nozzle are outboard of the condenser/reheater in each ECS bay.
Functional Description
Air in the water collector turns in a circular flow. This pushes condensed water out of the air. A collector removes the water. Air pressure sends the water to the spray nozzle. The nozzle sprays the water in the incoming ram air near the secondary heat exchanger. The water added to the ram air inlet duct increases the heat removal by the secondary heat exchanger.
EFFECTIVITY BEJ ALL 21-52-00
Page 16
D633W101-BEJ Sep 05/2002
AIR CONDITIONING -PACK CLG AND MIX MANIFOLD TEMP CTRL -WATER COLLECTOR AND SPRAY NOZZLE
EFFECTIVITY BEJ ALL 21-52-00
Page 17
D633W101-BEJ Jan 05/2002
AIR CONDITIONING -PACK CLG AND MIX MANIFOLD TEMP CTRL -LOW LIMIT AND TURBINE BYPASS VLVS
Purpose
The low limit valve controls the amount of reheater air that goes around the first stage turbine of the ACM. The CTC uses this valve to limit the output air temperature of the first stage turbine above 34F (1C) so water in the air does not freeze.
The second stage turbine bypass valve controls the amount of condenser air that goes around the second stage turbine of the ACM. The CTC uses turbine bypass valve to control pack outlet temperature.
These valves function together with the ram air doors to control the output temperature of the pack.
Physical Description
The valve has these parts:
*
Position indicator
*
Disc
*
Valve body
*
Manual open/close knob
*
Electrical actuator
*
Electrical connector (not shown).
The low limit valve and the second stage turbine bypass valve are the same. Each uses a disc which rotates to adjust air flow. The disc is driven by a motor that can be turned in both directions. The motor uses 115v ac to operate the valve.
An RVDT gives an electrical indication of the disc position. An indicator on top of the electrical actuator gives a visual indication of disc position.
Functional Description
The CTC controls the operation of the low limit valve and the second stage turbine bypass valve. Both valves operate the same. A close or open signal from the CTC turns the motor in the necessary direction.
The RVDT in each valve sends the position of the valve to the CTC. The CTC use the position information for control and valve position indication.
Training Information Point
Manually open or shut the valve with the manual open/shut knob. You must disconnect the electrical connector first. The valve will move to the commanded position when the valve gets power if you do not remove the electrical connector.
EFFECTIVITY BEJ ALL 21-52-00
Page 18
D633W101-BEJ Sep 05/2002
AIR CONDITIONING -PACK CLG AND MIX MANIFOLD TEMP CTRL -LOW LIMIT AND TURBINE BYPASS VLVS
EFFECTIVITY BEJ ALL 21-52-00
Page 19
D633W101-BEJ Jan 05/2002
AIR CONDITIONING -PACK CLG AND MIX MANIFOLD TEMP CTRL -ECONOMY COOLING VALVE
General
The economy cooling valve opens to let air go around the air cycle machine turbine 1 and the water separation parts of the pack. The valve opens when the pack functions in the economy cooling mode or the standby cooling mode. See the functional description of the packs in this section for more information about these modes.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：777 AMM 飞机维护手册 空调 Air Conditioning(56)
