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WARNING
Remove the pinch piping (large) after discharging the oil and
gas in the piping.
Do not melt the brazing material while there remain oil and gas in the
piping, or otherwise the oil may catch fire or the piping may be blown
away and injury may result.
3.
Connecting refrigerant piping to outdoor units
If connected to the front
Remove the shutoff valve cover to connect.
Gas side shutoff valve
Gas side accessory
pipe (1)
When connected at lateral side (bottom)
Remove the knock hole on the bottom frame and route the piping
under the bottom frame.
Liquid side
Gas side
shutoff valve
shutoff valve
Gas side
accessory pipe (2)
Brazing
Liquid side piping
(field supply)
Gas side piping
(field supply)
Note
• When connecting the piping on site, be sure to use the accessory
piping.
• Make sure the onsite piping does not come into contact with other
piping or the bottom frame or side panels of the unit.
4.
Branching the refrigerant piping
Heed the restrictions below when installing the refrigerant branch-
ing kit and read the installation instruction manual with the kit.
(Improper installation could lead to malfunctioning or breakdown
of the outdoor unit.)
<REFNET joint>
Install the REFNET joint so it splits horizontally or vertically.
Horizontal
surface
A-arrow view
Horizontal
English
Liquid side shutoff valve
Brazing
Liquid side accessory
pipe (1)
Brazing
Knockout hole
Punch the knock
hole.
Liquid side
accessory pipe (2)
Liquid side
accessory pipe (1)
Gas side
accessory pipe (1)
Brazing
±30˚ or less
Vertical
5.
Connecting Muffler
• Connect the provided muffler to the gas pipe.
CAUTION
Install the muffler within 1 m of the gas side shutoff valve.
The refrigerant piping and indoor unit may generate noise unless the
muffler is installed correctly.
Liquid side shutoff valve
Gas side shutoff valve
Gas side accessory pipe (1)
Muffler
On-site
piping
On-site piping
• Set the muffler horizontally.
CAUTION
Make sure that the inclination of the upper and lower sides does not
exceed an angle of ±10° at the time of installation.
A malfunction may result if the inclination exceeds the above angle.
Brazing
Muffler
• Wrap the provided thermal insulation tube around the muffler and
secure both ends of the muffler to an appropriate object, such as
the wall or ground.
Thermal
Thermal
insulation tube
insulation tube
(on-site piping)
(accessory)
CAUTION
Dew condensation may result if the muffler is exposed.
Furthermore, the weight of the muffler may break the piping unless
the muffler is secured.
Brazing
Liquid side
accessory pipe (1)
Brazing
±10˚ max.
Thermal
insulation tube
(on-site piping)
7
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