Refrigerant Recharge - Roland FAVORITE ON-OFF Series Service Manual

1.2

Refrigerant Recharge

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Prior to recharging the refrigerant, confirm the addi�onal amount of refrigerant required using the following table:
Models Standard length
<18k 5m (16.4�)
18k 5m (16.4�)
22k&24k
5m (16.4�)
&27k
Procedure:
1. Connect the charge hose to the 3-way service port
and then open the 2- and the 3-way valves.
2. Connect the charge hose to the valve at the bo�om
of the cylinder.
3. If the refrigerant is R410A, invert the cylinder to
ensure a complete liquid charge.
4. Open the valve at the bo�om of the cylinder and close
the check valve on the charge set to purge the air.
5. Place the charging cylinder onto an electronic scale
and record the star�ng weight.
6. Operate the air condi�oner in cooling mode.
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Max. eleva�on
8m (26.2�)
10m (32.8�)
10m (32.8�)
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Max. length
20m (65.6�)
25m (82�)
25m (82�)
7. Open the valves (Low side) on the charge set and
charge the system with liquid refrigerant.
8. When the electronic scale displays the correct weight
(refer to the gauge and the pressure of the low side
to confirm), disconnect the charge hose from the
3-way valve's service port immediately and turn off
the air condi�oner before disconnec�ng the hose.
9. Mount the valve stem caps and the service port.
10. Use a torque wrench to �ghten the service port cap to
a torque of 18 N.m.
11. Check for gas leakage.
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Addi�onal refrigerant
20g/m (0.21oz/�)
20g/m (0.21oz/�)
40g/m (0.42oz/�)
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