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Figure 5-8. Expansion Valve (Quench)
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TM-5-4120-347-14 Air Conditioner Horizontal Compact 9 000 BTU/HR 208 Volt 3 Phase 60 Hertz Manual
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Figure 5-9. Solenoid Valves
TM5-4120-347-14
Place the expansion valve in the unit and align tubing ends.
(2)
(3)  Protect valve from overheating during brazing operations. Direct flame away from valve body and
wrap valve body with wet rag.
Braze the joints in accordance with paragraph 5-11.
Secure the valve to the housing with two each screws, post spacers, brackets and lock nuts.
Replace the dehydrator. (See paragraph 5-28.)
Leak test all newly connected joints and all tube connections in the area.
Rewrap insulation at expansion valve joints.
Install the sensing bulb in the bulb well.
Insert approximately one ounce of thermal mastic in the bulb well.
Insert the sensing bulb from the expansion valve into the bulb well.
Move bulb back and `forth to distribute the mastic.
Set the bulb about one inch (2.5 cm) beyond the open end of the bulb well,
Install the top rear cover.
(11) Evacuate and charge the refrigeration system in accordance with paragraphs 5-13 and 5-14,
See paragraph 4-45 and figure 4-36 for access, testing and coil replacement.
a. Removal. See figure 5-9.
(1)
Disconnect power at power source.
Remove the top rear cover.
(2)
NOTE
If only the coil is bad, it can be replaced without breaking into the refrigerant system. See paragraph
4-45.
(3) Discharge and purge the refrigeration system per paragraphs 5-9 and 5-10.
(4) Disconnect the connector plug.
(5) Remove the top nut that attaches the coil to the valve body, and remove the coil date plate and
connector assembly.
(6) Cut plastic tie down straps as necessary to remove the solenoid valve cable.
(7) If the connector plug is to be reused unsolder it from the leads.
(8) If the grommet is to be reused remove it from the old coil assembly.
(9) Be sure that the refrigerant has been discharged.
5-23

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