Sinclair SF-250F3, Service Manual, Page: 36 / 44

57
Select circuit breaker that having a contact separation in all poles not less than 3 mm providing full disconnection
，
where MFA is used to select the current circuit breakers and residual current operation breakers
Table 12.4.1
Air flow 255-1300m
3
/h
Power supply voltage 220-240V
Power supply phase 1 phase
Power supply frequency
50Hz
、
60Hz
Circuit breaker / Fuse 15A / 15A
Communication wire between indoor
unit and wired controller
Three core shielded wire
Table 12.4.2
Wiring

See product wiring nameplate.

Check that the voltage and the frequency of the power supply correspond to 220-240V single phase at
50Hz/60Hz; that the available power is sufficient for the running the equipment; and that the supply cables
are of adequate section for the maximum current which will be required.

Make sure that the power supply system complies with current national safety regulations.

Electrical connections must be made in accordance with the wiring diagrams supplied with the machine. For
connection to the power supply network, use double-insulated flexible cable, twin pole + earth, section
1.5mm2, type H05RN-F.

Pass the power supply cable through the slot beside the air filter. Use the cable clamp provided on the inner
side of the panel to secure the power supply cable and the connecting cables, and strip only the length of
cable needed to go into the connector block. In the event that the unit is mounted on a metal surface, earth
connections must be made in compliance with local regulations. If the optional extra electric heating element
is fitted, a separate power supply must be provided. Use double-insulated flexible cable, twin pole + earth,
section 2.5mm2, type H05RN-F.
Startup instructions
Caution:
Machine commissioning or the first startup must be carried out by skilled personnel qualified to work on this type
of product.
Before starting up, make sure that the installation and electrical connections have been carried out in accordance
with the instructions in this manual. Also make sure that there are no unauthorized persons in the vicinity of the
machine during these operations.
Preliminary checks before startup

Before starting up the unit, make sure that:

The unit is positioned correctly;

The flow and return pipes of the water system are correctly connected;

The pipes are clean and free of air;
Rated current of appliance
（
A
）
Nominal cross-sectional area (mm )
>3
>6
>10
>16
>25
>32
>50
and
and
and
and
and
and
and
≤3
≤6
≤10
≤16
≤25
≤32
≤50
≤63
0.75
1
1.5
2.5
4
6
10
and
and
and
and
and
and
and
1
1.5
2.5
4
6
10
16
1
1
1.5
2.5
4
6
10
and
1 and
and
and
and
and
and
and
2.5
2.5
2.5
4
6
10
16
25
0.5 and 0.75
Flexible cords
Cable for fixed wiring
2