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

1 8 | Bosch Climate 5000 Series Four Way Cassette Ductless Single Split Air Conditioner / Heat Pump

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)
< 15,000
R410A
15,000 to < 24,000
Inverter
Split Air
24,000 to < 36,000
Conditioner
36,000 to 48,000
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.24 for cut
examples.
90°
Oblique
Figure 24
NOTICE:
 Be extra careful not to damage, kink, or deform the pipe
while cutting. This will drastically reduce the heating
efficiency of the unit.
NOTICE: SYSTEM FAILURE
 If the indoor unit is installed higher than the outdoor unit,
it may cause liquid compression or deterioration of the oil
return. Oil traps in the rising gas piping can prevent this.
 To prevent liquid compression or deterioration of the oil
return, an oil trap should be installed every 10m(32.8ft) of
vertical suction line riser.
Data subject to change
Max. Equivalent Max. Height
Length m (ft) Variation m (ft)
25 (82ft) 10 (33ft)
30 (98.5ft) 20 (66ft)
50 (164ft) 25 (82ft)
65 (213ft) 30 (98.5ft)
Rough Warped
Gas piping
Oil trap
Outdoor unit
The indoor unit is installed higher than the outdoor unit
Figure 25
NOTICE: SYSTEM FAILURE
 If the outdoor unit is installed higher than the indoor unit, it
is recommended that vertical suction risers not be up sized.
 Proper oil return to the compressor should be maintained
with suction gas velocity. If velocities drop below7.62m/s
(1500 ft/min), oil return will be decreased.
 An oil trap should be installed every 6m(20ft) of vertical
suction line riser.
Gas piping
Oil trap
Indoor unit
The outdoor unit is installed higher than the indoor unit
Figure 26
Installation Manual
Indoor unit
Liquid
10m/32.8ft
piping
10m/32.8ft
Outdoor unit
Liquid
6m/20ft
piping
6m/20ft
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