26
PMEN0654 rev.0 - 12/2023
5
PIPINGCONNECTIONFOROUTDOORUNIT
REFRIGERANT PIPING AND REFRIGERANT CHARGE
! CAUTION
• At the test run, fully open the spindle and ball stop valve.
• If not fully opened, the devices will be damaged.
• Do not aempt to turn service valve rod beyond its stop.
• Do not loosen the stop ring. If the stop ring is loosened, it is dangerous since the spindle will hop
out.
• An excess or a shortage of refrigerant is the main cause of trouble to the units. Charge the
correct refrigerant quanty according to the descripon of label at the inside of service cover.
• Check for refrigerant leakage in detail. If a large refrigerant leakage occurs, it will cause
diculty with breathing or harmful gases would occur if a re was being used in the room.
5.8.2 Connecng are adapter
Flare nut (accessories)
Pipe (accessories)
Indoor unit
Flare adapter (accessories)
Gas line
Pipe (eld supplied)
Liquid line
The piping sizes for indoor unit and outdoor unit are dierent. Aach the are adapter
(accessories) at the indoor piping union part.
Use the adequate are adapter as follows:
Indoor unit
Flare adapter
Gas pipe Liquid pipe
2.0 HP
Big size
(∅15.88 → ∅12.70)
-
2.5 HP
Big size
(∅15.88 → ∅12.70)
Small size
(∅9.52 → ∅6.35)
3 HP - -
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