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7
Connecting the pipework
and cables to the outdoor
unit
This chapter describes the refrigerant pipe connections and the
electrical cable connections on the outdoor unit.
7.1 Refrigerant pipes
CAUTION!
Work on the system must only be performed by authorised
and qualified after-sales service technicians.
Certain requirements with regard to pipe length and rise must
be complied with when installing refrigerant pipes. Once all re-
quirements have been fulfilled, certain preparations must be
made.
Once these are complete, the connecting pipe from the out-
door unit to the indoor unit can be connected.
Make sure that no foreign substances get into the refrigerant
lines during installation work. Furthermore, make sure that no
oxygen gets into the refrigeration circuit. The connection lines
must be evacuated. The installation of piping should be re-
stricted to the minimum possible.
During installation work, please ensure that the connections
and lines are not subjected to any mechanical loads. The refrig-
erant lines must be protected from damage to prevent leakage
and the associated escape of refrigerant. All connection points
between the outdoor and indoor unit must be easily accessible
for maintenance and repair purposes.
After completion of the pipe system, check all pipes for leaks
using suitable means and only carry out leakage tightness tests
with dry nitrogen. When carrying out the leakage tightness test,
never apply more pressure to the system than is specified in the
instructions and on the type plates.
CAUTION!
All installation work for the pipe system must be carried out by
specialist personnel.
CAUTION!
Incorrect installation, maintenance or repair of this device
may increase the risk of damage to property or personal
injury.
CAUTION!
Connector surfaces must be checked for cleanliness before
assembly and, if necessary, cleaned with the aid of suitable
agents.
CAUTION!
Work on the device must be subject to local and national
standards.
CAUTION!
Always wear adequate personal protective equipment
(protective gloves, safety glasses, etc.) when working with
refrigerant.
CAUTION!
Work involving R32 refrigerant must only be carried out by
experienced and adequately trained personnel.
EN-16
CAUTION!
Only equipment and tools intended for the product, pressure
and temperatures may be used for work on the device.
CAUTION!
When working on the device, the use of spark-generating
machines should be avoided.
7.1.1 Requirements for the pipe length
Model
6 kW
10 kW
14 kW
Total additional refrigerant
Total additional refrigerant
Total additional refrigerant
The standard pipe length is 15 m. Up to a length of 15 m, no ad-
ditional refrigerant filling is required. For pipe lengths over 15 m,
the system must be filled with additional refrigerant in accord-
ance with the table.
*Example: When installing the 14 kW model at a distance of 30
m, 570 g refrigerant must be added according to the following
calculation: (30-15) x 38 g = 570 g
NOTE
For filling with additional refrigerant, see Cap. 5.3 on page 10.
452172.66.01-EN · FD 0204
LIA 0608HWCF M - LIA 0911HWCF M
and rise
Pipe size
in mm (inch)
Length A (m)
(Diameter: )
Gas
Liquid Normal Min. Max. Normal Max.
15.9
6.35
15
3
(5/8")
(1/4")
15.9
9.52
15
3
(5/8")
(3/8")
15.9
9.52
15
3
(5/8")
(3/8")
additional
Model
Refrigerant
6 kW
10 kW
14 kW
Rise B (m)
*additional
Refrigerant
(g/m)
30
0
15
20
30
0
15
38
30
0
15
38
Total length of the
pipe for liquid
≤ 15 m
> 15 m
0 g
(A-15) x 20 g
0 g
(A-15) x 38 g
0 g
(A-15) x 38 g
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