Friedrich VRP12K, Service And Parts Manual

Page: 113 / 221

113 PB
R-410A SEALED SYSTEM REPAIR
Replace The Condensor Coil 12k/24k
1. Remove unit from the closet.
2. Ensure no charge is left in the system, evacuating according to EPA standards.
3. Remove the lower left panel.
4. Remove six mount screws on rear of condenser coil.
5. Detach one thermistor from coil.
6. Sweat out tubing connections to condenser coil as required
7. Slide coil and shroud assembly out of the rear of the unit to access the 6 screws attaching the shroud to the outdoor coil.
8. Remove coil from shroud and reinstall evaporator coil in reverse sequence.
9. Pressurize with a combination of R‑410A and nitrogen. Leak test all connections. If a leak cannot be found, pressurize with a
combination of Nitrogen and a trace charge of R‑410A and sweep with with an electronic or Halide leak detector. Recover refrigerant
and repair any leaks found.
10. If leak detector is unavailable, remove all refrigerant from system and pressurize with nitrogen to 550 psi. Check that system holds
pressure.
Repeat Step 9 to insure no more leaks are present.
10. Evacuate the system with a good vacuum pump capable of a final vacuum of 200 microns or less. The system should be evacuated
through both liquid line and suction line gauge ports. While the unit is being evacuated, seal all openings on the defective compressor.
Compressor manufacturers will void warranties on units received not properly sealed. Do not distort the manufacturers tube
connections.
11. Recharge the system with the correct amount of refrigerant. The proper refrigerant charge will be found on the unit rating plate. The
use of an accurate measuring device, such as a charging cylinder, electronic scales or similar device is necessary.