Connecting Flare Adapter - Hitachi UTOPIA R32 Series Installation And Operation Manual
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Also See for UTOPIA R32 Series:
- Technical catalogue (132 pages) ,
- Installation & operation manual (51 pages) ,
- Installation & operation manual (50 pages)
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CAUTION
• At the test run, fully open the spindle and ball stop valve.
• If not fully opened, the devices will be damaged.
• Do not attempt 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 quantity according to the description of label at the inside of service cover.
• Check for refrigerant leakage in detail. If a large refrigerant leakage occurs, it will cause
difficulty with breathing or harmful gases would occur if a fire was being used in the room.
5.8.2 Connecting flare adapter
Pipe (field supplied)
The piping sizes for indoor unit and outdoor unit are different. Attach the flare adapter
(accessories) at the indoor piping union part.
Use the adequate flare adapter as follows:
PMEN0654 rev.0 - 12/2023
Flare nut (accessories)
Pipe (accessories)
Liquid line
Gas line
Flare adapter (accessories)
Indoor unit
Gas pipe
Big size
2.0 HP
(∅15.88 → ∅12.70)
Big size
2.5 HP
(∅15.88 → ∅12.70)
3 HP
Indoor unit
Flare adapter
Liquid pipe
-
Small size
(∅9.52 → ∅6.35)
-
-
5
26
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