Sanyo SPW-X483GH56 Installation Instruction page 78

CAUTION
1 1 1 1 1
AS
2 2 2 2 2
S
(4) Do a leak test of all joints of the tubing (both
indoor and outdoor) and both wide and narrow
3 3 3 3 3
service valves. Bubbles indicate a leak. Wipe off
the soap with a clean cloth after a leak test.
X
(5) After the system is found to be free of leaks,
relieve the nitrogen pressure by loosening the
charge hose connector at the nitrogen cylinder.
When the system pressure is reduced to normal,
disconnect the hose from the cylinder.
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 minutes or more
NOTE
The required time in the above table is calculated
based on the assumption that the ideal (or target)
vacuum condition is around 10 mmHg abs.
0 0 0 0 0
(2) When the desired vacuum is reached, close the
"Lo" knob of the manifold valve and turn off the
C
vacuum pump.
Charging additional refrigerant
Charging additional refrigerant (calculated from the
narrow tube length as shown in Section 1-8
"Additional Refrigerant Charge") using the narrow
tube service valve.
Use a balance to measure the refrigerant
accurately.
To avoid nitrogen entering
the refrigerant system in a
liquid state, the top of the
cylinder must be higher than
the bottom when you pres-
surize the system.
Usually, the cylinder is used
in a vertical standing posi-
tion. (Refer to the previous
page.)
If tubing length is
longer than 15 m
90 minutes or more
Manifold valve
Pressure
Lo Hi
gauge
Outdoor unit
Service
valve
Narrow
tube
Indoor unit
Pressure
gauge
Wide tube
Narrow tube
76 76
S4179544 S4179544
Vacuum pump
Wide tube
Fig. 9-3
Manifold valve
Lo Hi
Vacuum pump
0141_C_I
Fig. 9-4
0140_C_I