Si39-303 Appendix
General Information 109
<The Example of A Wrong Pattern>
Max.allowable
Piping Length
Outdoor Unit - Multi Connection Piping Kit Actual piping length 10m or less, equivalent length 13m or less
Multi Connection Piping Kit - Indoor Unit
Actual piping length 150m or less, equivalent length 175m or
less, the total extension 300m or less
REFNET Joint - Indoor Unit Actual piping length 40m or less
Allowable
Level
Difference
Outdoor Unit - Outdoor Unit 5m or less
Outdoor Unit - Indoor Unit
50m or less
(when an outdoor unit is lower than indoor units : 40m or less)
Indoor Unit - Indoor Unit 15m or less
Oil is collected to the outdoor
unit at the time of a stop,
because of bottom omission of
piping.
×
Wrong
V3039
Oil is collected to the low level outdoor
unit at the time of a stop, because of
downward slope of piping.
×
¡
¡
The example of installation on which oil is not collected.
Wrong
Good Good
Vertical
Projection
(V3086)
200~
300mm
Vertical projector
is required if this
distance is
2m or more.
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