Bending The Pipes; Bending Pipes In The Air - Danfoss iC7 Series Installation Manual

Installation Guide | iC7 Series Liquid-cooled System Modules
There are 2 ways to make permanent bends to the pipes.
The quickest and easiest way is to make the bend in the air by bending it by hand. Do this if only 1 bend is needed and the
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dimensions do not matter, or the dimension can be adjusted by cutting the pipe after bending.
If multiple precise pipes with several bends are needed, it is recommended to use a bending jig. There are commercial jigs on the
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market (for example, Eiskoffer Bending Kit from Alphacool), but the jig can be also self-made from plywood or some other easy-to-
work material. But the material must be able to withstand at least 200 °C (392 °F).
Required tools for bending the pipes:
Gloves
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Adjustable heat gun
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Round silicone rubber cord
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Ø12–12.5 mm (0.47–0.49 in)
¢
Solid
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Hardness: minimum 60 Shore A, recommended >70 Shore A
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Recommended tools for bending the pipes:
Water bucket or sink
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Distilled water
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Bending jig
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OVERHEATING OF THE PIPES
If the pipe is overheated, the wall thickness and pressure resistance change, and the shape of the pipe collapses easily.
Do not heat the pipes above 180 °C (356 °F).
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UNEVEN HEATING OF THE PIPES
If the pipe is heated unevenly or over a too small area, it wrinkles easily when the pipe is bent. The wall strength and pressure
resistance at the wrinkled point is uncertain.
Before bending the pipes, heat the pipes evenly and over the whole bending area.
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Bending the Pipes

3.4

Bending Pipes in the Air

3.4.1
1.
Insert the silicon cord into the pipe and to the bending location.
It is recommended that the pipe end is at least 5 cm (2 in) from the bending area. If the bending area is too close to the
pipe end, the pipe end can become oval, which can cause the pipe and fitting joint to leak.
It is recommended to moisten the cord with distilled water to make it easier to insert into the pipe.
The cord is inserted into the pipe before it is heated, to produce equal counter pressure and to prevent the tube from
buckling. The hard pipe is easy to bend evenly with the cord inside.
2.
Set the heat gun upright on the table and set the temperature to 350 °C (662 °F).
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