©Termo-tehnika, d.o.o.
ID.: 17-16-24-3006-03 | 12.2016
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4.3.2 Pipe connection protection
CAUTION
The pipeline and electrical cables have to be protected with heat and waterproof insulation
in a protective pipe. This prevents soaking of the pipe connections in cases of high
groundwater or rainwater and with it intensive draining of heat into the surroundings.
The pipe connection between the external and internal device can be made by laying the pipes in two
ways:
A inside two separate ribbed protective pipes,
B in one joint ribbed protective pipe.
A
B
P16
Fill with waterproof polyurethane
foam, i.e.: purpen
P20
Ribbed protective pipe min.
ɸ
75
P17
Protective pipe for external sensors
or communication cables
P21
The ribbed protective pipe for the power cable
depends on the dimension of the supply cable
P18
Copper pipe Cu
P22
Ribbed protective pipe min.
ɸ
150
P19
Insulation min. 13 mm.
4.3.3 Preparation of the refrigerant pipe
Prepare the pipe in steps. Unsuitably made joints are one of the main reasons for leakage, the joints
must thus be made thoroughly and in accordance with the listed steps.
STEP 1: Cutting the pipe
Use a pipe cutter which does not leave chips to cut the pipe.
Determine the distance between the exterior and interior device.
Cut the pipes longer in order to make it possible to connect the internal and external device
normally.
1
Copper pipe
3
Uneven
2
Inclined
4
Rough
