Bosch Climate 5000 AA Series Installation Manual page 13

Installation Manual
Step 3: Flare pipe ends
Proper fl aring is essential to achieve an airtight seal.
1. After removing burrs from cut pipe, seal the ends with PVC tape to prevent
foreign materials from entering the pipe.
2. Sheath the pipe with insulating material.
3. Place fl are nuts on both ends of pipe. Make sure they are facing in the proper
direction, because you can't put them on or change their direction after
fl aring. See Fig. 14.
Flare nut
Copper pipe
Figure 14
4. Remove tape from ends of pipe when ready to perform fl aring work.
5. Clamp fl aring block on the end of the pipe. The end of the pipe must extend
beyond the fl are form.
Flaring tool
Figure 15
6. Place fl aring tool onto the fl aring block.
7. Turn the handle of the fl aring tool clockwise until the pipe is fully fl ared. Flare
the pipe in accordance with the dimensions shown in table 8.
Bosch Thermotechnology Corp. | 01.2017
Bosch Climate 5000 AA Series Inverter Multi Split-Type Ductless Air Conditioner / Heat Pump | 13
Piping extension beyond fl are form
Table 8
8.
Step 4: Connect pipes
Connect the copper pipes to the indoor unit first, then connect it to the outdoor unit.
You should first connect the low-pressure pipe, then the high-pressure pipe.
1.
2.
A
Figure 16
3.
4.
5.
Tube
Figure 17
Outer
Tightening
diameter Tightening
Torque
of tube in. Torque
lb ft (N•m)
(mm) lb ft (N•m)
1/4" (6.4) 11.0 (15.0) 11.8 (16.0)
3/8" (9.5) 18.4 (25.0) 19.2 (26.0)
1/2" (12.7) 25.8 (35.0) 26.6 (36.0)
5/8" (15.9) 33.2 (45.0) 34.7 (47.0)
Remove the fl aring tool and fl aring block, then inspect the end of the pipe for
cracks and even fl aring.
When connecting the flare nuts, apply a thin coat of refrigeration oil to the
flared ends of the pipes.
Align the center of the two pipes that you will connect.
Indoor unit tubing
Tighten the fl are nut as tightly as possible by hand.
Using a wrench, grip the nut on the unit tubing.
While fi rmly gripping the nut, use a torque wrench to tighten the fl are nut
according to the torque values in table 7.
Max.
Fig. 15, A in. (mm)
Min. Max.
0.0275 (0.7) 0.05 (1.3)
0.04 (1.0) 0.063 (1.6)
0.04 (1.0) 0.07 (1.8)
0.078 (2.0) 0.086 (2.2)
Flare nut Pipe
Data subject to change