SA SPW-C0705DZH8 Instrucciones De Instalación página 38

Evacuation
(1) Attach the charge hose end described in the preceding
steps to the vacuum pump to evacuate the tubing and
indoor unit. Confirm that the "Lo" knob of the manifold
valve is open. Then, run the vacuum pump. The operation
time for evacuation varies with the tubing length and
capacity of the pump. The following table shows the
amount of time for evacuation:
Required time for evacuation
when 30 gal/h vacuum pump is used
If tubing length is
less than 15 m
45 min. or more
Evacuation is not necessary for the balance tube if only 1
outdoor unit is installed.
NOT E
The required time in the above table is calculated based on the
assumption that the ideal (or target) vacuum condition is less
than –101 kPa (–755 mmHg, 5 Torr).
(2) When the desired vacuum is reached, close the "Lo"
knob of the manifold valve and turn off the vacuum pump.
Confirm that the gauge pressure is under –101 kPa
(–755 mmHg, 5 Torr) after 4 to 5 minutes of vacuum pump
operation. (Fig. 6-4)
Manifold valve
Pressure
Lo Hi
gauge
Open
Suction tube
Open
Discharge tube
Open
Liquid tube
Open
Balance tube
If tubing length is
longer than 15 m
90 min. or more
Vacuum pump
Close
Close
Outdoor unit
Close
Close
CAUTION
Use a cylinder designed for use with R410A.
Charging additional refrigerant
● Charging additional refrigerant (calculated from the liquid
tube length as shown in Section 1-8 "Additional Refrigerant
Charge") using the liquid tube service valve. (Fig. 6-5)
● Use a balance or scale to measure the refrigerant accurately.
● If the additional refrigerant charge amount cannot be
charged at once, charge the remaining refrigerant in liquid
form by using the suction tube service valve with the system
in Cooling mode at the time of test run. (Fig. 6-6)
● Close the valve on the cylinder containing R410A.
Pressure
gauge
Suction tube
Discharge tube
Liquid tube
Balance tube
Suction tube
Discharge tube
Fig. 6-4
Liquid tube
Balance tube
36
Manifold valve
Lo Hi
Liquid
R410A
Close
Close
Close
Outdoor unit
Close
Open
Close
Close
Close
Open
Open
Close
Open
Outdoor unit
Close
Open
Close
Open
Valve
Fig. 6-5
Fig. 6-6