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2WAY SYSTEM
Outdoor Unit Repair Procedures
3
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 “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.
Liquid tube service valve
Normal unitOutdoor unit
Cleaning dry core
Balance tube
Dry core (bidirectional:
for R410A refrigerant)
Ball valve
Liquid tube
Gas tube
Fig. 15
SM830204-05_2WAY SYS_new.indb 32 15/01/05 15:31:41
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