Design Technical Manual

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Pipe connection
CAUTION
● Seal the pipe route hole with putty (locally purchased) such that there are no gaps.
Small insects or animals that are trapped in the outdoor unit may cause a short circuit in the
electrical component box.
● To prevent pipe damage; do not make sharp bends.
Bend the pipe at a radius of 2-3/4in. (70mm) or greater.
● Do not bent pipe many times at same part to prevent break.
● After completing all the pipe connection by brazing, perform the indoor unit pipe connection with a
flare joint.
● When removing the pinch pipe or brazing the joint pipe, carry out the work while cooling down the
3-way valve sufficiently.
● Braze the joint pipe onto the 3-way valves at the liquid , suction gas and discharge gas side.
Install the joint pipe appropriately so that it can be connected easily with the main pipe.
● Braze the joint pipe at the liquid , suction gas and discharge gas side with the main pipe.
* Be sure to supply nitrogen when brazing.
Knockout hole
Knockout hole
Joint pipe A
(Accessories)
Joint pipe D
(Accessory or Locally purchased) *1
Joint pipe B
(Accessory or Locally purchased) *1
*1) Locally purchased and accessory
depend on the model, so for details,
refer to "accessories of outdoor unit".
Joint pipe C
(Accessories)
Joint pipe
(Locally
purchased)
Joint pipe
(Locally
purchased)
Suction gas pipe
(Locally purchased)
Discharge gas pipe
(Locally purchased)
Liquid pipe (Locally
purchased)
To RB unit or indoor unit
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SYSTEM DESIGN SYSTEM DESIGN