Vacuum, Charging And Leakage Test - Bosch Compress 3400i AWS Installation Manual

Installation
▶ Firstly, you need to remove the side cover to access the valves:
Fig. 15 Remove the side cover
▶ Align the centre of the pipes to the valves.
Fig. 16 Screwing
▶ Use a torque wrench to tighten the valves firmly according to the table
below.
Tube size 1/4
Flare nuts 13-18
Valve cap 13-20
Torque
N.m
Service port 11-13
cap
Table 7
14
1
2
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0010036812-001
3/8 1/2 5/8
40-45 60-65 70-75
13-20 18-25 18-25
11-13 11-33 11-33
Fig. 17 Pipes connected to the outdoor unit
The refrigerant lines must not contact directly with each other or with the
wall. All pipe work must be insulated.
1
2
Fig. 18 Connection of the outdoor unit with the indoor unit
[1] Insulated pipes
[2] Pipe clamp with EDPM lining
[3] Sealed pipes
Refrigerant pipe joints must be at surface level. Pipes joints must not be
installed underground.
5.2.5

Vacuum, charging and leakage test

At this stage, pipe connections between outdoor and indoor units should
be completed. Subsequently, the air that remains in the refrigerant pipes
needs to be evacuated. Afterwards, a leakage test needs to be
conducted to detect possible gas leaks.
The steps for the evacuation and leakage test are stated below:
1. Clean the pipes with nitrogen gas.
2. Connect the charging hoses with a push pin to the low and high sides
of the charging set and the service port of the gas and liquid valves.
Ensure that the end of charging hose is connected with the push pin
to the service port.
3. Connect the centre hose of the charging set to a vacuum pump.
4. Turn on the power switch of the vacuum pump and ensure that the
vacuum value will be approximately 30Pa (250 MICRON,
0.3milibar). This ensures that the refrigeration circuit is properly
dehydrated.
Compress 3400i AWS – 6721825369 (2021/11)
0010036820-001
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0010036796-001