DC INVERTER MULTI VRF INSTALLATION
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6.3 Installation of Metal Embedded Pipe
Work Order
Plot the line on ground if possible and use laser to project it onto the roof. This is quick and
correct.
Advance Installation of Metal Embedded Parts
Please select according to local codes.
Subsequent Installation of Expansion Bolts
In case that the metal embedded parts cannot be used due to design change, the expansion
bolts may be used.
Subsequent Installation of Expansion Bolts
●
The foot pedal shall be supported on three points if exceeding 2m.
The foot pedal must be fixed securely to the ladder.
●
Please do not work on the top of ladder.
6.4 Installation of Carriage of Refrigerant pipin
1) Fixing of horizontal pipe
1
）Fixing of horizontal pipe
The refrigerant pipe will extend and shrink with each start or stop of the air conditioner unit
(5~10 times / hour). Under a temperature difference of 80
℃, this extension may reach 13.84mm
for every 10m. To prevent failure, the pipes must be reinforced as follows.
Spacing between supports
Outer diameter of pipe (mm) 6.35-8.52
Over 12.7
Spacing between supports (m) Below 1.2 Below 1.2
Note: If the gas pipe and liquid pipe are suspended together, the size of liquid pipe shall
prevail.
CAUTION:
Never let the pipe in direct contact with the fixing metal parts. Thermal insulation shall be
provided around the fixing metal parts; otherwise, condensing will occur.
2
）Fixing of vertical pipe
The vertical pipe may be fixed by using the commodity tools in market or self-made tools. As
above, the fixing point shall also be thermally insulated.
3
）Fixing of other points
Measures shall be taken to prevent the extension or shrinkage of pipes from causing excessive
loads to some positions, machine joint and waterproof points. Generally, such positions refer to
the branch pipe joint, pipe ends, four sides of indoor unit and wall-cross hole.
Metal Embedding
Diagram
Plotting
Installation of Metal
Embedded Parts
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