Installation Guide
R32
R32
R32
R32
R32
R32
R32
R32
10A
HFC
410A
19
Read Before Installation
Air Tightness Test
No changes from the conventional method. Note that a refrigerant leakage detector for R22 or
R4
cannot detect
leakage.
~
Halide torch R22 or R407C leakage detector
Items to be strictly observed :
1.Pressurize the equipment with nitrogen up to the design pressure and then judge the equipment's air tightness, taking
temperature variations into account.
2.When investigating leakage locations using a refrigerant, be sure to use
3.Ensure that is
in
a liquid state when charging.
Reasons:
1.
Use
of
oxygen as the pressurized gas may cause an explosion.
2.Charging with gas will lead the composition
of
the remaining refrigerant
in
the cylinder to change and then this
refrigerant can not be used.
Vacuuming
1.Vacuum pump with check valve
A vacuum pump with a check valve is required to prevent the vacuum pump oil from flowing back into the refrigerant
circuit when the vacuum pump power is turned off (power failure). It is also possible to attach a check valve to the actual
vacuum pump afterwards.
2.Standard degree
of
vacuum for the vacuum pump
Use a pump which reaches 65Pa or below after 5 minutes
of
operation.
In
addition, be sure to use a vacuum pump that has been properly maintained and oiled using the specified oil. If the
vacuum pump is not properly maintained, the degree
of
vacuum may be too low.
3.Required accuracy
of
the vacuum gauge
Use a vacuum gauge that can measure up to 650Pa. Do not use a general gauge manifold since it cannot measure a
vacuum
of
650Pa.
4.Evacuating time
Evacuate the equipment for 1 hour after 650Pa has been reached.
After envacuating, leave the equipment for 1 hour and make sure the that vacuum
is
not lost.
5-0perating procedure when the vacuum pump
is
stopped
In
order to prevent a backflow
of
the vacuum pump oil, open the relief valve on the vacuum pump side or loosen the
charge hose to drawn
in
air before stopping operation.The same operating procedure should be used when using a
vacuum pump with a check valve.
Charging Refrigerant
must be
in
a liquid state when charging.
Reasons:
is a refrigerant (boiling point = -52 °C ) and can roughly be handled
in
the same way as R
however,
be
sure to fill the refrigerant from the liquid side, for doing so from the gas side will somewhat change
the composition
of
the refrigerant
in
the cylinder.
Note
•
In
the case
of
a cylinder with a syphon, liquid is charged without turning the cylinder up side down. Check the
type
of
cylinder before charging.
Remedies to be taken
in
case
of
a refrigerant leak
When refrigerant leaks, additional refrigerant may be charged. (Add the refrigerant from the liquid side)
Characteristics
of
the Conventional and the New Refrigerants
• Because is a simulated azeotropic refrigerant, it can be handled
in
almost the same mammer as a single refrigerant
such as R22. Howerver, if the refrigerant is removed in the vapor phase, the composition
of
the refrigerant
in
the cylinder
will somewhat change.
• Remove the refrigerant
in
the liquid phase. Additional refrigerant may be added
in
case
of
a refrigerant leak.