Owners Manual

16 49-5000255
ENGLISH
INSTALLATION INSTRUCTIONS
Selection of Piping Dimensions
Select refrigerant branching dimensions between outdoor
units and connection kit, between connection kit and
indoor units according to the Operation & Installation
Manual of outdoor units and indoor units.
Dimensions (mm) of connection pipe of the vale box
Pipe Connection
Use pipe size adapters with the refrigerant piping and
connection kit sizes are different. (See accessories)
Pipe Insulation
Use insulation to bridge any gaps (see Fig. 1) on the pipe
insulation after the leak test is complete.
NOTE: The connection kit liquid and gas pipes must be
insulated after leak testing.
Notes regarding insulation of the flare nuts and
connections at the connection kit:
1. Please use torque specifications given in the install
manual for all flare connections.
2. Do not over tighten clamps used to hold the insulation
on the piping.
3. Place seams in the insulation facing upward to prevent
condensate leakage.
4. Place seams in joint insulation facing upwards to prevent
condensate leakage.
Type of
Connection kit
Dimension
（
outer diameter
）
Gas pipe of outdoor
units / Conversion
Gas pipe of indoor
units / Conversion
Liquid pipe of
outdoor units /
Conversion
Liquid pipe of
indoor units /
Conversion
MS1-036A 5/8-1/2-3/8 5/8-1/2-3/8 3/8-1/4 3/8-1/4
MS3-036A 3/4-5/8 5/8-1/2-3/8 3/8-1/2 1/4-3/8
14
Piping
Indoor Outdoor
Thermal insulation pipe
Tie wire
Auxiliary pipe
Seal
Connection kit
Clamp
both
ends with tie
wire or clamp
Tube side of connection
kit of the insulation pipe
Field pipe
side of the
insulation pipe