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1-3. CAUTIONS FOR REFRIGERANT PIPING WORK
Tools for R410A (The following table shows whether conventional tools can be used or not.)
Tools and materials
Gauge manifold
Air purge, refrigerant charge
Charge hose
and operation check
Gas leak detector
Gas leak check
Refrigerant recovery equipment
Refrigerant recovery
Refrigerant cylinder
Refrigerant charge
Safety charger
Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Charge valve
Prevent gas from blowing out
when detaching charge hose
Vacuum pump
Vacuum drying and air
purge
Bend the pipes
Bender
Pipe cutter
Cut the pipes
Welder and nitrogen gas cylinder
Weld the pipes
Refrigerant charging scale
Charge refrigerant
Vacuum gauge or thermis-
Check the degree of vacuum. (Vacuum
valve prevents back flow of oil and refri-
tor vacuum gauge and
gerant to thermistor vacuum gauge)
vacuum valve
Charging cylinder
Refrigerant charge
: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
: Tools for other refrigerants can be used under certain conditions.
: Tools for other refrigerants can be used.
1-4. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL
Although "-BS" model has been designed to be resistant to salt damage, observe the following precautions to maintain the
performance of the unit.
1. Avoid installing the unit in a location where it will be exposed directly to seawater or sea breeze.
2. If the cover panel may become covered with salt, be sure to install the unit in a location where the salt will be washed away by
rainwater. (If a sunshade is installed, rainwater may not clean the panel.)
3. To ensure that water does not collect in the base of the outdoor unit, make sure that the base is level, not at angle. Water
collecting in the base of the outdoor unit could cause rust.
4. If the unit is installed in a coastal area, clean the unit with water regularly to remove any salt build-up.
5. If the unit is damaged during installation or maintenance, be sure to repair it.
6. Be sure to check the condition of the unit regularly.
7. Be sure to install the unit in a location with good drainage.
Use
R410A tools
Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Tool exclusive for R410A
Tool exclusive for R410A
Tools for other refrigerants can
be used if equipped with adap-
ter for reverse flow check
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants
can be used
Tool exclusive for R410A
Can R22 tools be used?
(Usable if equipped
with adapter for rever-
se flow)
4
Can R407C tools be used?
(Usable if equipped
with adapter for rever-
se flow)
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