Refrigerating Connections - Airwell PAC BTE UI 4 Manuel D'utilisation

4 - REFRIGERATING CONNECTIONS

4.1 - DUCTING
PRESSURE EQUIPMENT DIRECTIVE
This unit is a subset: to operate it has to be combined to
another unit.
It is an installer responsability :
follow the PED Directive and to the national regulations of
PED Directive realization
consider the insertion of any additional security devices
check the safety device operation
write on the serial label number the amount of total
refrigerant
issue the Declaration of conformity
inform the user of the need to carry out regular checks
Use only copper pipes for refrigeration, specifications for
R410A
Pipes must be clean.
On vertical sections ensure the presence of siphons every six
metres of unevenness on the delivery/suction line only.
Plug the ends of the pipe prior to passing it through a hole in
the wall (1).
Do not place the ends of pipes which have not been plugged
or closed with tape directly on the ground (2).
1
If the installation of the pipes is not to be completed within the
next day or for a long period of time, braze the ends of the
pipes and introduce nitrogen oxide via a Schrader valve
access joint to avoid the formation of humidity and the
contamination of the particles.
Size
height difference with outdoors
unit higher than indoors unit
Height difference due to the
Equivalent length of the lines (metres ) = Effective length
(metres) + (Q.ty of curves x K)
Consider K=0.3 m for wide radius 90° curves;
Consider K=0.5 m for standard 90° elbow curves
Parameter 41 (protected by password) must be
configured based on the pipe length (refrigerant line):
2
0 = short pipe (max 25 m) default
1 = long pipe (from 25 m to 50 m)
Internal unit
The internal unit shipped with a nitrogen charge of about 1
bar.
If it is discharged, test the leaks also before the connections.
Before attaching the ducting to the two units, clean with dry air
or nitrogen.
Refrigerant pipe min/max
A m
equivalent length
Maximum refrigerant pipe
B m
B m
presence of the siphon
6 m back up siphon
C m
(gas line)
Type of pipes
Size .
Liquid Ø external
Gas Ø external
Min. thickness gas
Min. thickness liquid
10kW -
4kW - 6kW 8kW
16kW
2 - 20 2 - 30 2 - 50
15 15 25
20 20 30
6 6 6
4kW - 16kW
3/8" (9,5mm)
5/8" (15,9mm)
0,8 mm
0,8 mm
19