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1.5. Using R32 refrigerant outdoor units
CAUTION:
• Use C1220 copper phosphorus, for copper and cop
-
per alloy seamless pipes, to connect the refrigerant
pipes. Make sure the insides of the pipes are clean
and do not contain any harmful contaminants such
as sulfuric compounds, oxidants, debris, or dust.
Use pipes with the specified thickness. (Refer to
5.1.) Note the following if reusing existing pipes that
carried R22 refrigerant.
- Replace the existing flare nuts and flare the flared sec
-
tions again.
- Do not use thin pipes. (Refer to 5.1.)
•
Store the pipes to be used during installation in-
doors and keep both ends of the pipes sealed until
just before brazing. (Leave elbow joints, etc. in their
packaging.) If dust, debris, or moisture enters the
refrigerant lines, oil deterioration or compressor
breakdown may result.
• Use ester oil, ether oil, alkylbenzene oil (small
amount) as the refrigeration oil applied to the flared
sections. If mineral oil is mixed in the refrigeration
oil, oil deterioration may result.
• Servicing shall be performed only as recommended
by the manufacturer.
•
Do not use refrigerant other than R32 refrigerant. If
another refrigerant is
used, the chlorine will cause
the oil to deteriorate.
• Use the following tools specifically designed for use
with R32 refrigerant. The following tools are neces-
sary to use R32 refrigerant. Contact your nearest
dealer for any questions.
Tools (for R32)
Gauge manifold
Flare tool
Charge hose
Size adjustment gauge
Gas leak detector
Vacuum pump adapter
Torque wrench
Electronic refrigerant charging scale
•
Be sure to use the correct tools. If dust, debris, or
moisture enters the refrigerant lines, refrigeration
oil deterioration may result.
1.4. Before starting the test run
CAUTION:
• Turn on the main power switch more than 12 hours
before starting operation. Starting operation just
after turning on the power switch can severely dam
-
age the internal parts. Keep the main power switch
turned on during the operation season.
• Before starting operation, check that all panels,
guards and other protective parts are correctly
installed. Rotating, hot, or high voltage parts can
cause injuries.
• Do not touch any switch with wet hands. Electric
shock may result.
•
Do not touch the refrigerant pipes with bare hands
during operation. The refrigerant pipes are hot or
cold depending on the condition of the flowing re
-
frigerant. If you touch the pipes, burns or frostbite
may result.
• After stopping operation, be sure to wait at least five
minutes before turning off the main power switch.
Otherwise, water leakage or breakdown may result.
1. Safety precautions
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