Refrigerant Piping Connection Instructions - Bosch Climate 5000 SCI Installation Manual

Liquid side
Indoor
Outdoor
Liquid side
Indoor
Outdoor
X
Fig. 25.
CAUTION
• Oil traps
If the indoor unit is installed higher than the outdoor unit:
- 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 10 m of vertical suction line
riser. (See Fig. 26)
Gas piping
Oil trap
Outdoor unit
Fig. 26.
The indoor unit is installed higher than the outdoor unit
CAUTION
If the outdoor unit is installed higher than the indoor unit:
-It is recommended that vertical suction risers not be upsized.
Proper oil return to the compressor should be maintained with
suction gas velocity. If velocities drop below 7.62 m/s, the oil return
will be decreased. An oil trap should be installed every 6 m of vertical
suction line riser. (See Fig. 27)
Climate 5000 SCI – 6720887405 (2018/04)
Liquid side
Outdoor
Indoor
X
Indoor unit
10 m
Liquid piping
10 m
Gas piping
Oil trap
Outdoor unit
Fig. 27.
The outdoor unit is installed higher than the indoor unit
Permitted length
Piping Total piping
length length
(farthest dis-
tance from the
line pipe branch)
(farthest dis-
tance from the
line pipe branch)
Drop Drop height
height between indoor
and outdoor unit
Drop height
between two
indoor units
Table 7.
7.2

Refrigerant Piping Connection Instructions

CAUTION
• The branching pipe must be installed horizontally. An angle of more
than 10° may cause malfunction.
• DO NOT install the connecting pipe until both indoor and outdoor
units have been installed.
• Insulate both the gas and liquid piping to prevent water leakage.
Step1: Cut pipes
When preparing refrigerant pipes, take extra care to cut and flare them
correctly. This will ensure efficient operation and minimize the need for
future maintenance.
Refrigerant Piping Connection
Indoor unit
6 m
Liquid piping
6 m
18K+18K 30 L+Max
(L1, L2)
24K+24K 50
30K+30K
15 L1, L2
10 L1-L2
20 H1
0.5 H2
15