Panasonic U-8ME2E8 Service Manual & Test Run Service Manual page 113

9. Compressor
(16) After evacuating all nitrogen gas from the tubing, apply vacuum to all outdoor units where dry cores were
removed until the pressure is –101kPa {–755 mm Hg, 5 Torr} or less.
(17) INSTALLATION: Refer to the Installation Instructions for further information. Charge with an amount of
refrigerant equal to the amount that was recovered.
(B) If a ball valve is not installed on the outdoor unit
(1) See the section "4-2-3. Refrigerant recovery procedures (2) : Indoor unit with no ball valve equipped". Perform
pump down of the refrigerant from all indoor units and inter-unit tubing to the outdoor unit side.
(2) Cut the liquid (narrow) tube at all outdoor units where dry cores will be attached, then attach the dry cores and
ball valves as shown in Fig. 15.
(3) For the next steps, see the steps (6) – (17) in
Dry core (bidirectional:
for R410A refrigerant)
Ball valve
(A)
Cleaning dry core
Outdoor unit
Gas tube
Balance tube
Liquid tube
Outdoor Unit Repair Procedures
on the previous page.
Normal unit
Fig. 15
3 - 37
2WAY SYSTEM
Liquid tube service valve
3