50
English
Ins
tallation
3
Open the valve of the low pressure side of
manifold gauge anticlockwise.
4
Evacuate the air in the connected pipes using the
vacuum pump for about 15 minutes.
࡛
Make sure that pressure gauge shows -0.1 MPa
(-76 cmHg, 5 torr) after about 10 minutes. This
procedure is very important to avoid a gas leak.
࡛
Close the valve of the low pressure side of
manifold gauge clockwise.
࡛
Turn off the vacuum pump.
࡛
Check for 2 minutes if there is any pressure
change.
࡛
Remove the hose of the low pressure side of
manifold gauge.
5
Set a valve cork of liquid and gas service port to
the open position.
Step 3.4 Adding refrigerant
If you use a pipe longer than the length specified in
the piping codes and standards, you must add 15g of
refrigerant R-410A for each extra metre. If you use a
pipe shorter than the length specified in the piping
codes and standards, the evacuating time is normal.
Refer to the Service Manual for further details.
CAUTION
࡛
The remaining air in the Refrigeration cycle, which
contains moisture, may cause malfunction of the
compressor.
࡛
Always contact the service centre or a professional
installation agency for product installation.
R-410A is a mixed type of refrigerant. It is necessary
for recharging under conditions of liquid. When
recharging refrigerant from the refrigerant cylinder
to the equipment, take the following instructions:
Before recharging, check whether the cylinder has
a siphon or not. There are two ways to recharge the
refrigerant:
Siphon
Charge the refrigerant
standing the cylinder upright.
Charge the refrigerant turning
the cylinder upside down.
<Cylinder with siphon>
<Cylinder without siphon>
NOTE
࡛
If R-410A refrigerant is charged with gas, the
composition of the charged refrigerant changes
and the characteristics of the equipment vary.
࡛
During the measuring operation of refrigerant
quantity added, use electronic scales. If cylinder
doesn't have siphon, upset it.
IBIM_EN.indd 50
3/17/2017 10:03:44 AM
