North American HVAC MOC-12HFN1-MS0W, Service Manual

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Engineering of electrical wiring
104 Installation
Liquid pipe Insulation meterial Gas pipe
 The insulation material at the joint pipe shall be 5~10cm longer than the gap of the insulation material.
 The insulation material at the joint pipe shall be inserted into the gap of the insulation material.
 The insulation material at the joint pipe shall be banded to the gap pipe and liquid pipe tightly.
 The linking part should be use glue to paste together
 Be sure not bind the insulation material over-tight, it may extrude out the air in the material to cause bad
insulation and cause easy aging of the material.
9.2 Insulation of drainage pipe
9.2.1 Operational procedure of refrigerant pipe insulation
Select the suitable pipe → insulation (except joint section) → piping layout and connection → drainage test →
insulate the joint parts
9.2.2 Purpose of drainage pipe insulation
The temperature of condensate drainage water is very low. If insulation is not enough, it shall form dew and
cause leakage to damage the house decoration.
9.2.3 Insulation material selection for drainage pipe
 The insulation material should be flame retardant material, the flame retardancy of the material should
be selected according to the local law.

Thickness of insulation layer is usually above 10mm.
 Use specific glue to paste the seam of insulation material, and then bind with adhesive tape. The width
of tape shall not be less than 5cm. Make sure it is firm and avoid dew.
9.2.4 Installation and highlights of insulation construction
 The single pipe should be insulated before connecting to another pipe, the joint part should be insulated
after the drainage test.
 There should be no insulation gap between the insulation material.
10 Engineering of electrical wiring
10.1 Highlights of electrical wiring installation

All field wiring construction should be finished by qualified electrician.
 Air conditioning equipment should be grounded according to the local electrical regulations.
 Current leakage protection switch should be installed.
 Do not connect the power wire to the terminal of signal wire.
 When power wire is parallel with signal wire, put wires to their own wire tube and remain at least 300mm
gap.
 According to table in indoor part named “the specification of the power” to choose the wiring, make sure
the selected wiring not small than the date showing in the table.
 Select different colors for different wire according to relevant regulations.