Refrigerant Piping Connection; Connection Instructions - Refrigerant Piping - Bosch Climate 5000 Series Installation Instructions Manual

8 Refrigerant Piping Connection

The length of refrigerant piping will aff ect the performance and energy
effi ciency of the unit. Nominal effi ciency is tested on units with a pipe
length of 5 meters (16.5ft). A minimum pipe run of 3 meters (9.8ft)
is required to minimize vibration & excessive noise. Refer to the table
below for specifi cations on the maximum length and drop height of
piping.
Maximum length and drop height of refrigerant piping per unit model
Model Capacity (BTU/h)
9K, 12K, 18K
R410A
Inverter
24K, 30K
Split Air
Conditioner
36K, 48K, 60K
Table 5
8.1 Connection Instructions – Refrigerant Piping
Step 1: Cut pipes
When preparing refrigerant pipes, take extra care to cut and fl are them properly.
This will ensure effi cient operation and minimize the need for future maintenance.
1. Measure the distance between the indoor and outdoor units.
2. Using a pipe cutter, cut the pipe a little longer than the measured distance.
3. Make sure that the pipe is cut at a perfect 90° angle. Refer to Fig.25 for cut
examples.
90°
Oblique
Figure 25
NOTICE:
 Be extra careful not to damage, kink, or deform the pipe
while cutting. This will drastically reduce the heating
efficiency of the unit.
Bosch Climate 5000 Series Four Way Cassette Ductless Split Air Conditioner / Heat Pump (06.2022)
Max. Equivalent Max. Height
Length m (ft) Variation m (ft)
30 (98.5ft) 20 (66ft)
50 (164ft) 25 (82ft)
65 (213ft) 30 (98.5ft)
Rough Warped
NOTICE: OIL TRAPS - SYSTEM FAILURE
 If oil flows back into the outdoor unit's compressor, this
might cause liquid compression or deterioration of oil
return. Oil traps in the rising gas piping can prevent this.
— An oil trap should be installed every 6m (20ft) of
vertical suction line riser (<36,000Btu/h unit).
— An oil trap should be installed every 10m (32.8ft) of
vertical suction line riser (≥36,000Btu/h unit).
Gas piping
Oil trap
Indoor/
Outdoor unit
Figure 26
Installation Instructions
Indoor/
Outdoor unit
6m/20ft
(< 36000 Btu/h unit)
Liquid
10m/32.8ft
piping
(≥ 36000 Btu/h unit)
6m/20ft
(< 36000 Btu/h unit)
10m/32.8ft
(≥ 36000 Btu/h unit)
| 19