Samsung VRF DVM S2 Technical Data Book page 55

10. Installation
Outdoor unit
Pipe installation for an outdoor unit
1 Direction of the pipe
Refrigerant pipe can be withdrawn from the front, left
and right side. Take necessary method to install the pipes
according to the condition of the installation site.
Left side
connection
1 Connecting refrigerant pipe for outdoor unit
Classification
• 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,
Working process 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.
H/P
Gas side pipe
H/R
Low pressure
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.
Right side
connection
Front side
connection
Front side connection
gas pipe
CAUTION
• Caution for using knock-out hole
• Make sure to prevent any damages on the exterior of the
outdoor unit.
• Remove all burrs around the knock-out hole and apply varnish
on the cross section and edges of the knock-out hole to
prevent rust.
• Use a cable protection tube and bushing to prevent a cable
from being damaged when passing through a knock-out hole.
Right/left (and bottom) side connection
• 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.
Liquid side pipe Gas side pipe
High pressure
gas pipe
Liquid side pipe
Low pressure
gas pipe
Knock-out
hole
Liquid side pipe
High pressure
gas pipe
Liquid side pipe