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5.1 Piping Materials
(1) Prepare field-supplied copper pipes.
(2) Select clean copper pipes. Make sure there is no dust and
moisture inside. Blow the inside of the pipes with nitrogen or dry
air, to remove any dust or foreign materials before connecting
pipes.
(3) Select copper pipes based on Fig. 5.2.
9
Flexible Canvas Connection
Thermal
Insulation Material
Flexible Canvas Connection
Return Air Inlet
Air Outlet
Level
Fig. 4.8 Top Surface Inclination Degree
Service Access
(with Filter Screen）
Fig. 4.9 Air Duct Connection
4.4.4 Leveling of Indoor Unit
(1) Check to ensure the top surface is level, and
measure the max. top surface inclination degree.
(2) As shown in Fig. 4.8, the rear part of indoor unit is slightly
lower than its front part (by 0~13/64 in.) so as to facilitate
drainage.
(3) Tighten the suspension nut upon completion of
adjustment. It's essential to apply thread locking agent to
avoid nut looseness.
！
Please cover the machine with plastic cloth during installation
so as to keep it clean.
4.4.5 Air Duct Connection
Air duct is connected to indoor unit via canvas hose to
effectively isolate noise and vibration.
<Example>
5.
Refrigerant Piping Work
！
Use refrigerant R410A in the refrigerant cycle. Do not charge
oxygen, acetylene or other flammable and poisonous gases into
the refrigerant cycle when performing a leakage test or an air-
tight test. These types of gases are extremely dangerous and
can cause an explosion. It is recommended that nitrogen be
used for these tests.
13/16 inch
(23-5/8 in.×23-5/8 in.）
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