BUFFET AND GALLEY -LOWER LOBE AIR CHILLER
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BUFFET AND GALLEY -AIR CHILLER -PHYSICAL DESCRIPTION
Physical Description
The air chiller is a vapor-cycle cooling unit. It has these parts:
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Lifting strap (2)
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Condenser air exhaust (top)
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Chilled air outlet (evaporator outlet)
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Chilled air return (evaporator inlet)
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Condenser air exhaust (side)
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Electrical connector (2)
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Refrigerant sight glass
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Air filter (condenser air inlet).
The chiller weighs approximately 85 pounds (39 kg). A drain in the bottom of the chiller (not shown) carries the water away. Shop technicians use the refrigerant sight glass during servicing.
Exhaust Ports
The chiller has two condenser air exhaust ports to permit alternate installations. When you install a chiller, make sure that one port is open and the other port has a cover plate.
Electrical Receptacles
The chiller has two electrical receptacles. The primary receptacle (W4J1) is on the side of the chiller. The alternate receptacle (W3J1) is on top of the chiller. If you connect the airplane wiring to the alternate (top) receptacle. Connect the chiller wiring plug W3P1 to the primary (side) connector. Stow the two connector caps on the adjacent spare receptacles.
If you connect the airplane wiring to the primary receptacle (W4J1), stow the chiller wiring plug (W3P1) on the adjacent spare receptacle. Put one of the space caps on the alternate receptacle (W3J1).
Air Inlet Filter
You can clean the condenser air inlet filter. Remove the filter from the chiller. Wash the filter with soap and water then rinse the filter with clean water. Dry the filter with compressed air.
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BUFFET AND GALLEY -AIR CHILLER -PHYSICAL DESCRIPTION
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BUFFET AND GALLEY -AIR CHILLER -FUNCTIONAL DESCRIPTION
Functional Description
A vapor-cycle refrigeration system in the chiller uses a condenser and evaporator to transfer heat. A fan brings condenser cooling air in through a filter then exhausts that air through an outlet. Another fan moves chilled air from the evaporator through the galley refrigerator compartment then back to the evaporator. The evaporator cools the air to a temperature of 30F (0C).
The galley supplies 115/208v ac, three-phase power to operate the chiller. A control panel at the galley provides control and indication. Control signals are 28v dc.
A switch (not shown) at the galley turns the chiller on and off. Other crew action is not necessary to operate the chiller. The chiller defrosts automatically and shuts off if there is a malfunction.
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BUFFET AND GALLEY -AIR CHILLER -FUNCTIONAL DESCRIPTION
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LAVATORIES -INTRODUCTION
General Description
The airplane has flex and fixed lavatories. Flex lavatories attach to the seat tracks. You can install or move the lavatories anywhere in the flexibility zone. Fixed lavatories go in a specific place in the airplane and cannot be moved.
There are two kinds of lavatories: center and outboard. Center lavatories have straight sides and go in the center of the passenger compartment. Outboard lavatories have a curved side to fit against the side of the passenger compartment.
Location -Center Flex Lavatories
These are the possible center flex lavatory positions at door 2:
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2F-LC (door 2 forward -left center)
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2F-RC (door 2 forward -right center
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2A-LC (door 2 aft -left center)
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2A-RC (door 2 aft -right center).
These are the possible center flex lavatory positions at door 3:
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3F-LC (door 3 forward -left center)
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