10. Installation
Refrigerant pipe installation
CAUTION
•
Caution for welding the pipe to an outdoor unit
– When welding the pipe, the unit may get damaged by the heat and flame from welding. Use a flame
proofing cloth to protect the unit from a welding fire or flame. Sensor for detecting outside temperature is
located on the left side of the welding part so be extra careful not to damage the sensor when welding.
– The O-ring and Teflon packing inside service valve may get damaged by the heat from welding. Wrap the
bottom side of the service valve with a wet cloth and weld it as shown in the illustration. Also, water
dripping from the wet cloth may interrupt the welding. Make sure the water does not drip from the wet cloth.
– Make sure that connected pipes does not interrupt each other or make contact with the product.
(Vibration may cause damage to the pipes.)
– When removing the sealed pipe on the bottom side of the service valve, cut it with a pipe cutter first and then
start the welding.
When the sealed pipe is welded without cutting, you may get injured by the refrigerant within the pipe.
Classification
Front side connection
Right/left (and bottom) side connection
Working process
• First, remove the piping cover from the outdoor unit.
• Separate the knock-out hole that you are going to use. If you
separate the knock-out hole that is going to be unused, small
animals such as squirrels and rats may get into the unit through
the hole.
• Fix the bottom side of the piping cover first and then fix the top
part of it.
• Separate the knock-out hole at the bottom side of the unit and
install the pipe.
• After installing and insulating the pipe, close up the remaining
holes. If not, small animals such as rats and squirrels may get
inside the unit.
H/P
Liquid side pipe
Gas side pipe
Liquid side pipe
Gas side pipe
Pipe installation for an outdoor unit
2 Connecting refrigerant pipe for outdoor unit
Temperature
sensor
Wet towel
Service port
Service valve
