User Guide

15. Reconnect the electrical circuitry and test the system again following
manufacturer recommendations.
16. Any unused Pro-Flush
®
Solvent can be stored in the injection tank and saved for
future use. Ensure all valves are closed on the injection tank to prevent solvent
loss during storage. Dispose of the waste solvent in accordance with local and
state waste disposal regulations.
Flushing Line Sets for R-22 to R-410A Conversions
I. Equipment required
1. Pro-Flush™ Kit including one 8 oz. can of Pro-Flush
®
Solvent.
2. Re-sealable container to hold the contaminated ush material.
3. Nitrogen tank with regulator.
4. Vacuum pump with accessories
5. Absorbent shop cloths, rubber gloves and safety goggles.
II. Detailed Instructions
1. Disconnect and remove old equipment.
2. Make sure a re-sealable waste container is attached to the exit end of the line
set to capture the ushed oil. Establish one end of the line set as the discharge
point.
3. To maximize solvent contact time, restrict the ow at the discharge point. This will
also minimize the amount of solvent needed to thoroughly clean the
system. For best results, use a DiversiTech Line Set Flush Adapter (sold
separately) to connect the liquid line and the suction line at the disconnected
air handler. Inject solvent into the liquid line and collect solvent at the suction
line outdoors at the disconnected condensing unit.
4. Attach the hose and injector tool assembly to the outlet side of the pressure tank.
Fill the Pro-Flush
®
Injector pressure tank with Pro-Flush
®
Solvent. A tank may be
lled with up to 24 oz. of Pro-Flush
®
. Connect the hose from the
regulator of the nitrogen tank to the inlet (ball valve) side of the injector tank (g.
A, page 3).
5. Set the pressure regulator on the nitrogen tank at 50 psi, open the inlet valve at
the tank then slowly open the valve on the injector tank to pressurize it. DO NOT
EXCEED 200PSI.
6. Aer pressurizing the Injection Tank, close the both valves and disconnect the
nitrogen ll hose.
7. Line sets of dierent diameters, lengths and congurations will require dierent
quantities of Pro-Flush
®
Solvent to achieve complete removal of residual oils.
A. For liquid lines, one 8 oz. can of Pro-Flush
®
will typically clean up to 250 . of
liquid line: Insert the rubber adapter in the inlet of one of the line sets,
maintaining the injector tank in an upright position, inject Pro-Flush
®
Solvent in 3 second increments in stages. The number of ushes will
depend on the length of the line and the contamination level. A typical
line set will require 2 to 3 oz of Pro-Flush
®
to eectively remove the oil
residual in the line sets. Results will vary depending on contamination level.
B. For larger diameter tubing: Larger diameter line sets will require
considerably more Pro-Flush
®
Solvent due to increased volume of the larger
tubing. The ushing process will therefore require multiple 3 second
injections of Pro-Flush
®
solvent to achieve satisfactory results.
8. Connect the hose from the nitrogen tank to the inlet port (g. B, page 4) of the
part that is being ushed and purge the system at 150 psi for 1-2 minutes. This
will assure removal of all trace amounts of oil residue and solvents. Check the
solvent at the outlet port to be sure all contaminants have been purged from
the system. If the exiting solvent is not yet clear, repeat steps 7 & 8.
9. Connect the new equipment. Using a vacuum pump, evacuate the system to a
low micron level.
10. Check the system for leaks, then charge system with the refrigerant and oil per
the equipment manufacturer’s recommendations.
11. Connect the electrical circuitry and test the system again following
manufacturer recommendations.
12. Any unused Pro-Flush
®
Solvent can be stored in the injection tank and saved for
future use. Ensure all valves are closes on the injection tank to prevent solvent
loss during storage. Dispose of the waste solvent in accordance with local and
state waste disposal regulations.
6 7
These recommended quantities are based on typical ush situations during a conversion
from R-22 to R-410A. In the event of compressor burn out double the amount of ush
required to compensate for the added soil load. This is for lines only and do not calculate
in any components outside the line set.
Line Size Feet per 8 oz. Can Feet per Ounce
3/8 1 can Treats 250 31.3
1/2 1 can Treats 200 25.0
5/8 1 can Treats 150 18.8
3/4 1 can Treats 100 12.5
7/8 1 can Treats 50 6.3
1 1 can Treats 42 5.3
1 1/8 1 can Treats 39 4.9
1 1/4 1 can Treats 36 4.5
1 1/2 1 can Treats 31 3.8
1 5/8 1 can Treats 28 3.6
1 3/4 1 can Treats 26 3.3
1 7/8 1 can Treats 25 3.1
2 1 can Treats 23 2.9
Liquid Line Suction Line Length Estimated Ounces
3/8 3/4 25 2.8
3/8 3/4 35 3.9
3/8 3/4 50 5.6
3/8 7/8 25 4.8
3/8 7/
8 35 6
.7
3/8 7/8 50 9.6
3/8 1 25 5.6
3/8 1 35 7.8
3/8 1 50 11.1
3/8 1 1/8 25 6.3
3/8 1 1/8 35 8.8
3/8 1 1/8 50 12.6