g. Remove the thermometer or thermocouple probe from the suction line. and replace the insulating material.
Close the suction service valve, remove the pressure gauge, and install the capon the service valve gauge pat.
Whenever a leak is detected or a refrigeration component must be replaced, you must discharge all gas from the
refrigeration system (paragraph 5.22.a). Refer to figure 5-8 for identification of service valves. Remove the expansion
valve from the air conditioner as directed in the following steps: (See figure 5-9).
a. Remove insulation and band clamp from sensing bulb. Carefully detach bulb and capillary tube.
b. Remove two capscrews (10) securing the power assembly (1) to the valve body (9). Remove the power
assembly, capillary tube and sensing bulb.
c. Remove two cap screws that secure the vavle body to the support bracket. Detach equalizer line, if applicable.
Maintain a 1-2cfm (0.1 -0.2M3/min) flow of dry nitrogen through the refrigeration system to prevent
oxidation and scaling when brazing or debrazing components
d. Debraze tubing connections. Remove valve body (9).
Install the expansion valve in accordance with the following procedure:
a. Disassemble the valve by removing two capsccrews (10) that secure the power assembly (1) to the valve body
(9), and separate the two.
b. Install the valve body in the support bracket, and secure with two capscrews, finger tight. Connect tubing.
c. With dry nitrogen flowing through the refrigeration system raze tubing joints. Let cool. Tighten capscrews.
d. Install power assembly
(1, figure 5-9)
on valve body, being careful
to fit lugs
on the cage assembly (7) into
the cavities in the body (9). Secure with two capscrews (10). Connect equalizer line,if applicable.
e. Wrap thecapillary tubewith a double thickness of insulating tape, being careful to avoid kinking the tube.
f. Carefully lead the sensing tube to its position on the suction line. Clamp in position to the suction line. Cover
suction line, sensing bulb and clamp with insulating material.
g. Carefully form the capillary tube along adjacent piping, and tape to support.
5.82. Final Assembly
When the air conditioner has been successfully leak-tested replace the filter-drier as directed in paragraphs 5.53 through
5.55. This procedure includes evacuation, charging and pressure-testing the system. Complete the assembly as follows:
a. Position the top panel on the air conditioner and secure with 15 screws and packing washers in the top surface
and five screws through the rear flange.
b. Fit the fabric cover over the back of the air conditioner, and secure with 18 screws and washers.