Vaillant aroTHERM Series, Operating Instructions Manual

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5 Hydraulics installation
64
Installation and maintenance instructions aroTHERM 0020257297_02
5.2 Routing refrigerant pipes
5.2.1 Outdoor unit
Condition : Ground installation
▶
Route the refrigerant pipe from the outdoor unit through
a suitable safety pipe in the ground, as shown in the
figure.
▶
Bend the pipes only once into their final position. Use a
bending spring or a bending tool to avoid kinks.
Condition : Wall installation
▶
Route the refrigerant pipes from the outdoor unit through
the wall of the building.
▶
Bend the pipes only once into their final position. Use a
bending spring or a bending tool to avoid kinks.
▶
Ensure that any vibration is balanced. To do so, bend
the pipes in such a way that an omega-shaped elbow is
created, as shown in the figure.
▶
Ensure that the refrigerant pipes do not come into con-
tact with the wall.
▶
To secure these, use an insulated wall bracket (cold
insulation bracket).
▶
Route the refrigerant pipes in the wall duct with a slight
downward gradient to the outside.
5.2.2 Indoor unit
▶
Route the refrigerant pipes from the wall duct to the in-
door unit (
→
installation instructions for the indoor unit).
5.3 Removing the service valve cover
1. Remove the screws at the upper edge.
2. Release the cover by lifting it out of the stop.
5.4 Cutting the pipes to length and flaring the
pipe ends
Condition : Copper pipe without flaring
▶
Keep the pipe ends downwards when working on them.
Prevent the ingress of metal chips, dirt or moisture.
1
2
▶
Cut the copper pipe to length at a right angle using a
pipe cutter
(1) .
▶
Deburr the inside and outside of the pipe end (2) . Re-
move all chips carefully.
▶
Unscrew the flare nut from the associated service valve.
1
2
3
90°
1
▶
Slide the flare nut (3) onto the pipe end.
▶
Use a flaring tool to create flaring in accordance with the
SAE standard (90° flare).
▶
Insert the pipe end into the appropriate die matrix in the
flaring tool
(1) . Allow the pipe end to protrude by 1 mm.
Clamp the pipe end.
▶
Widen the pipe end (2) using the flaring tool.