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Dc Inverter VRF plus Water Heater Solution Service Manual INSTALLATION
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10.2 Three Principles of Refrigerant Piping Installation
Keep to the three principles of refrigerant piping:
Key
Factors
Measures to Avoid Failure
Dry
Invasion of outside water
Example: Rainwater, engineering
water
Invasion of indoor condensate
Clean
Formation of oxides inside the pipe
during welding
Invasion of dust and foreign articles
from outside
Airtight
Incomplete welding
Leakage from flared port
Leakage from edge
10.3 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.
10.4 Installation of Carriage of Refrigerant Piping
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.