ANSWER KEY: ECLSS Diagram

Directions:
Label the following diagram to become more familiar with 23 ECLSS individual components on the orbiter and their locations.

1.	Water coolant loops
2.	Interchanger heat exchanger
3.	Payload heat exchanger
4.	Freon-21 coolant loops
5.	Fuel cell power plants
6.	Aft avionics bay and cold plates
7.	Ground support equipment heat exchanger
8.	Ammonia boiler
9.	Hydraulic heat exchangers to radiators
10.	Midbody cold plates
11.	Fuel cell heat exchanger to Freon-21 coolant loops
12.	Avionics bays 1, 2, and 3A heat exchangers, fans, and cold plates	13.	Inertial measurement units heat exchanger and fans
14.	Water pumps
15.	Cabin air-to-water heat exchanger
16.	Humidity water separators
17.	Cabin fans and check valve assemblies
18.	Potable water chiller heat exchanger
19.	Liquid-cooled garment heat exchanger
20.	Freon-21 coolant pumps
21.	To radiators
22.	Flash evaporators
23.	Carbon dioxide absorber

Directions:
Label the following diagram to become more familiar with the 4 ECLSS subsystems and their functions.

1. Atmospheric Revitalization and Pressure Control System (ARPCS)
2. Active Thermal Control System 
3. Food, Water, and Waste Subsystem