Wiring; Outdoor Unit Wiring - Bosch Climate 5000 SCI Series Installation Manual

8

Wiring

Safety Precautions
WARNING
• Disconnect the power supply before working on the unit.
• All wiring must be performed according to local and national
regulations.
• Wiring must be done by a qualified technician. Improper connec-
tions may cause electrical malfunction, injury, or fire.
• An independent circuit and single outlet must be used for this unit.
DO NOT plug another appliance or charger into the same outlet. If
unit cannot handle the load or there is a defect in the wiring, it can
lead to shock, fire, and unit and property damage.
• Connect the power cable to the terminals and fasten it with a clamp.
An insecure connection may cause fire.
• Ensure that all wiring is done correctly and the control board cover
is properly installed. Failure to do so can cause overheating at the
connection points, fire, and electrical shock.
• Ensure that the main power supply connection is made through
a switch that disconnects all poles, with a contact gap of at least
3 mm.
• DO NOT modify the length of the power cord or use an extension
cord.
CAUTION
• Connect the outdoor wires before connecting the indoor wires.
• Ensure you ground the unit. The grounding wire should be located
away from gas pipes, water pipes, lightning rods, telephone wires
or other grounding wires. Improper grounding may cause electrical
shock.
• DO NOT connect the unit to the power source until all wiring and
piping is completed.
• Ensure that you do not cross your electrical wiring with your signal
wiring. This may cause distortion and interference.
To prevent distortion when the compressor starts (you can find the unit's
power information on the rating sticker):
• The unit must be connected to the main outlet. Normally, the power
supply must have a impedance of 32 ohms.
• No other equipment should be connected to the same power circuit.
TAKE NOTE OF FUSE SPECIFICATIONS
The air conditioner's printed circuit board (PCB) is designed with a
fuse that provides overcurrent protection. The specifications of the
fuse are printed on the circuit board, such as:
Indoor unit: T5A/250VAC, T10A/250VAC (applicable for units with
R32 refrigerant)
Outdoor unit: T20A/250VAC (for <24000 Btu/h unit), T30A/250VAC
(for >24000 Btu/h unit)
NOTE:
The fuse is made of ceramic.
Climate 5000 SCI – 6720887422 (2019/07)
8.1

Outdoor Unit Wiring

WARNING
Before performing any electrical or wiring work, isolate the main power
to the system.
1. Prepare the cable for connection.
a. You must first choose the correct cable size before preparing it for
connection. Ensure to use H07RN-F cables.
Rated Current of Appliance
(A)
≤6
6 - 10
10 - 16
16 - 25
25 - 32
32 - 45
Table 13. Minimum cross-sectional area of power and signal cable
b. Using wire strippers, strip the rubber jacket from both ends of the
signal cable to reveal approximately 150 mm of wire.
c. Strip the insulation from the ends.
d. Using a wire crimper, crimp u-lugs on the ends.
NOTE:
When connecting the wires, strictly follow the wiring diagram found
inside the electrical box cover.
2. Remove the electric cover of the outdoor unit. If there is no cover on
the outdoor unit, take off the bolts from the maintenance board and
remove the protection board. (See Fig. 45).
Fig. 45.
Wiring
Nominal Cross-Sectional Area
(mm²)
0.75
1
1.5
2.5
4
6
Cover
Screw
19