Electrical Connection - Bosch Compress 3400i AWS Installation Manual

5. Close the valves of low and high side of the charging set and turn off
the vacuum pump. Note that the needles in the gauge should not
move after approximately 30 minutes.
6. Disconnect the charging hose from the vacuum pump and from the
service ports of the gas and liquid valves.
7. Tighten the service port caps on both valves.
8. Remove the valve caps on both valves and open them using a hex key,
this charges the pipes and the indoor unit.
9. Remount the valve caps onto both valves.
10.Check for gas leaks from the four unions and from the valve caps. Test
with electronic leak detector or with a bubble leak finder.
1
2
3
5
4
3
6
7
Fig. 19 Vacuum, charging and leakage test
[1] Charging set
[2] Vacuum pump
[3] Cap
[4] Service valve
[5] Gas valve
[6] Liquid valve
[7] Outdoor unit
[8] Indoor unit
5.3

Electrical connection

DANGER
Risk of electric shock!
The components in the outdoor unit conduct electricity. The capacitor in
the outdoor unit must be discharged after disconnecting it from the
power.
▶ Switch off the master switch.
▶ Wait at least five minutes before any electrical work to ensure full
electrical discharge of the capacitors.
NOTICE
The installation will get damaged if the power is connected without
water.
Components in the heating system can overheat if the power is
connected before it has been filled up with water.
▶ Fill the DHW cylinder and heating system before turning on the
heating system, and establish the correct pressure.
Compress 3400i AWS – 6721825369 (2021/11)
Risk of electric shock or fire!
If the power load is to high for the power supply cord it will cause
electrical shock or fire.
▶ Follow the national wiring standards and regulations for electrical
work.
▶ If the circuit breaker is used, it must be able to disconnect all poles
with 3mm contact opening.
▶ A different electric circuit and power outlet from the indoor unit must
be used.
Risk of electric shock or fire!
If electric cabinet cover is not fixed perfectly, it will cause heat-up at the
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terminals and connections, fire or electrical shock.
▶ Arrange wire routing properly so that electric cabinet cover can be
fixed properly.
Risk of electric shock or fire!
The incorrect use of power supply cord may cause fire or electrical
shock.
▶ Do not damage or use an unspecified power supply cord.
▶ Do not modify the length of the power supply cord. If needed, use an
extension cord and do not share the outdoor unit power outlet with
0010036786-001
other electrical appliances.
▶ If the power supply cord is damaged, only a qualified person may
replace it.
The outdoor unit electrical connection must be disconnected safely and
according to applicable rules.
▶ For a safe operation, install a disconnection device that provides a
full disconnection under over-voltage category III conditions in the
mains wiring in accordance to the wiring rules.
Voltage should not vary more than 10% from the rated voltage.
The voltage between earth and neutral must be below 3V. Attention must
be made when connecting the phases of this appliance in the whole
electrical installation, so there is no phase unbalance in the household 3-
phase system (if there is any).
The outdoor unit must be connected to an adequate power outlet from a
circuit breaker as specified on the type plate.
▶ Choose a supply cord with an appropriate cable area for the fuse
protection and the appliance electrical current.
▶ Use the correct rating of the fuse and mains circuit for the model to be
installed.
▶ Connect the outdoor unit according to the circuit diagram
(Chapter 9.4). Never connect any other consumers.
WARNING
WARNING
WARNING
Installation
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