IM 991-2 • MAVERICK II ROOFTOP 100 www.DaikinApplied.com
Maintenance
Scroll Compressor Piping
When replacing an individual scroll compressor on tandem
Portion of a Tandem or Trio” on page 109
), three refrigerant
lines must be disconnected and re-assembled:
1. TPTL Oil Equalization Line
a. The TPTL line (
glass.
b. The TPTL line connects to each compressor with
“rotalock” fittings (
c. The TPTL line should be disconnected and re-used.
2. Suction Line
a. This is the largest diameter piping.
b. This line is brazed to each compressor.
3. Discharge Line
a.
This is the tubing that connects near the top of the
).
b. This line is brazed to each compressor.
Preferred Replacement
1. Drain the oil.
2. Disconnect the TPTL line.
3.
Cut out the failed compressor at the suction and
discharge tubes. Make the cuts in the straight portions
of the replacement tubes and as near the compressor
as possible.
4.
Braze couplings on the cut end of the original tubes so
that they fit snugly into place.
5. Replace the TPTL oil equalization line.
6.
Cut the new suction and discharge tubes to fit between
the compressor and the couplings.
7.
Assemble the new tubes but do not braze until everything
fits snugly.
8. Braze tubes into place.
Alternative Replacement
1. Drain the oil.
2. Disconnect the TPTL line.
3.
Cutout the failed compressor at the suction and
discharge tubes.
4. Remove the compressor.
5.
Un-sweat the cut suction and discharge stubs from their
fittings and completely clean the old braze joint.
6. Place the new compressor into position.
7. Replace the TPTL oil equalization line.
8. Place the entire replacement discharge and suction
tubes into position so that the tubes fit snugly into place.
9. Braze the tubes into place.
Figure 80: Oil Equalization Line
Figure 81: Oil Equalization Line with Rota-Lock Fittings
Figure 82: Suction Tubes
Figure 83: Discharge Tubes
