Sanyo CHDXR07263* If a ball valve is not installed on the outdoor unit, Cleaning dry core

10. Compressor

W-2WAY ECO-i SYSTEM Outdoor Unit Repair Procedures

(14)Perform steps (1) – (4), and remove all dry cores. Then connect the tubing between the liquid (narrow) tube valves and the ball valves.

(15)At all outdoor units where dry cores were removed, pressurize with 478.6 psi of nitrogen from the liquid tube service port and check for leaks.

(16)After evacuating all nitrogen gas from the tubing, apply vacuum to all outdoor units where dry cores were removed until the pressure is –14.7 psig (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.

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(B) If a ball valve is not installed on the outdoor unit

(1)Refer to “5-2-3. 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. 21.

(3) For the next steps, refer to (6) – (17) in (A) on the previous page.

Cleaning dry core

Outdoor unit	Liquid tube service valve
	Normal unit

Gas tube

Balance tube

Dry core (bidirectional: for R410A refrigerant)

Ball valve

Liquid tube

Fig. 21

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