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8. OUTDOOR UNIT INSTALLATION MANUAL
Engineering Data book
CAUTION
1. Do not put the spanner on the cap or cover.
The valve may be broken.
2. If applying excessive torque, the nut may be
broken according to some installation
conditions.
• After the installation work, be sure to check gas leak
of connecting part of the pipes with nitrogen.
• Pressure of R410A is higher than that of R22
(Approx. 1.6 times).
Therefore, using a torque wrench, tighten the flare
pipe connecting sections which connect the hydro/
outdoor units at the specified tightening torque.
Incomplete connections may cause not only a gas
leak, but also a trouble of the refrigeration cycle.
Refrigerant Pipe Length
Refrigeration pipe
H: max. ±30 m (above/below)
L: max. 30 m, min. 3 m
Cover
NO GOOD
Cap
Do not apply refrigerating machine oil to the
flared surface.
H
L
Hydro Unit
Outdoor unit
30 m chargeless
13-EN
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