3WAY SYSTEM
Outdoor Unit Repair Procedures
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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 mmHg, 5 Torr) or less.
(17)
INSTALLATION:
Refer to the “Information for the Person in Charge of Installation” items. 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) Refer to “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, refer to (6) – (17) in
(A)
on the previous page.
Normal unit
Cleaning dry core
Outdoor unit
Dry core (bidirectional:
for R410A refrigerant)
Ball valve
Liquid tube
Balance tube
Discharge tube
Suction tube
Fig. 15
Liquid tube service valve
5/A9#;'%1K5;56'/A5G
