Thermo King 098203, Руководство по обслуживанию

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Refrigeration Maintenance
192
Evaporator Expansion Valve (TXV) Replacement
NOTE: TXV can be accessed through the evaporator access door.
1. Perform a low side pump down or reclaim charge depending on the unit. Release the 2-3 lbs pressure
from the low side.
2. Open the evaporator access panel.
3. Install plywood or heavy cardboard on top of coil on the left and right side. This will protect the coil
from damage.
4. Remove the left side motor and fan and position in right side opening. Do not unwire the motor the
harness is long enough.
5. Remove TXV standoff mount.
6. Remove the panel to gain access to the TXV element.
7. Cut the one ty band off the insulation around the element. Peel back the insulation to expose the clamp
holding the element. Loosen the clamp and remove the element from the tube.
8. Unsolder the three tubes to the TXV and remove the valve from the unit.
9. Prepare the tubes in the unit and on the new TXV for installation.
10. Solder in the new TXV. Use 15% silver solder 203-364.
11. Pressurize the refrigeration system and check for leaks (see “Refrigeration Leak Test Procedure” in
this chapter). Repair leak if required.
12. Evacuate the system (see “Evacuation and Cleanup of the Refrigeration System” in this chapter).
1. TXV Mount
2. Access Panel
3. Element
4. Tube on Suction Line
Figure 164: TXV Valve and Element Location