R410A50Hz Universal Outdoor Series Technical Manual Installation
152
GD Chigo Heating & Ventilation Equipment Co., Ltd.
5.Insulation Work
5.1 Insulation material and thickness
5.1.1. Insulation material
Insulation material should adopt the material which is able to endure the pipe’s temperature: no
less than 70
℃
in the high-pressure side, no less than 120
℃
in the low-pressure side(For the
cooling type machine, no requirements at the low-pressure side.)
Example: Heat pump type----Heat-resistant Polyethylene foam (withstand above 120
℃
)
Cooling only type----Polyethylene foam (withstand above 100
℃
)
5.1.2. Thickness choice for insulation material
Insulation material thickness is as follows:
Pipe diameter (mm)
Adiabatic material thickness
Refrigerant pipe
Φ6.4—Φ25.4
10mm
Φ28.6—Φ38.1
15mm
Drainage pipe
Inner diameterΦ20—Φ32
6mm
5.2 Refrigerant pipe insulation
5.2.1. Work Procedure
① Before laying the pipes, the non-jointing parts and non-connection parts should be heat
insulated.
② When the gas proof test is eligible, the jointing area, expanding area and the flange area should
be heat insulated
5.2.2. Insulation for non-jointing parts and non-connection parts
wrong
right
Gas pipe and liquid pipe should
not be put together to insulate
Insulate the gas pipe
(cooling only)
Insulate the gas pipe and
liquid pipe
