Welding - York R-410A Technical & Service Manual

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Don't place the pipe on the ground directly or scratch with the ground.
Cut the pipe and remove burrs with the cut surface downward.
Be sure to place a cap when raining.

4.6.2 Welding

1) Be sure to weld horizontally or downward, not upward.
2) Pay attention to the installation direction and angle to prevent oil-return or oil-accumulation.
3) Its necessary to charge nitrogen when welding.
Be far away from fire and prepare fire extinguishers and water to prevent fire on field.
Be careful not to injure people.
Confirm the proper clearance between pipe and connector.
Check if the supporting structural members are strong enough.
The traverse distances between supporting structural members are as follows:
Diameter (mm)
Max. Distance (m)
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Below 20
1.0
- 257 -
Installation
25~40
1.5
50
2.9