5-14. EXPANSION VALVE (CONT)
TOP AND RIGHT SIDE OF HOUSING
Refer to paragraph 5-7 and discharge refrigerant system.
5. Refrigerant System
Carefully unwrap thermostat switch sensing bulb from expansion valve
sensing line. Use care to prevent damage to sensing bulb.
6 . E x p a n s i o n V a l v e a . Unwrap insulation tape from sensing bulb.
b. Mark location and remove two (2) metal straps securing
c. Carefully unwrap thermostat switch sensing bulb from
expansion valve sensing line.
d. Unscrew and remove two (2) flare nuts and remove refrigerant
Iines from expansion valve.
e. Remove expansion valve.
Testing of expansion valve is to be done while the air conditioner is
operating and supplying cooling air. Exercise Extreme Caution.
7. Expansion Valve
a. Using a General Electric Type H-2 Halogen Test Detector
(or approved equal), check expansion valve for leaks.
b. Calibrate the detector with a General Electric LS-20 leak
standard (or approved equal) for a pure refrigerant leak rate
of 0.1 ounce per year.
c. Verify that there is NO leakage or damage.
d. Replace expansion valve if testing indicates that it is