LG UM30F Installation Manual page 47

Precautions when laying power
wiring
Use round pressure terminals for connections
to the power terminal block.
Round pressure terminal
When none are available, follow the
instructions below.
- Do not connect wiring of different
thicknesses to the power terminal block.
(Slack in the power wiring may cause
abnormal heat.)
- When connecting wiring which is the same
thickness, do as shown in the figure below.
Connect same thickness
wiring to both sides.
It is forbidden to
connect two to one
side.
- For wiring, use the designated power wire
and connect firmly, then secure to prevent
outside pressure being exerted on the
terminal block.
- Use an appropriate screwdriver for tightening
the terminal screws. A screwdriver with a
small head will strip the head and make
proper tightening impossible.
- Over-tightening the terminal screws may
break them.
Power wire
It is forbidden to
connect wiring of
different thicknesses.
THE INDOOR UNIT INSTALLATION
CAUTION
!
According to the confirmation of the above
conditions, prepare the wiring as follows.
1
Never fail to have an individual power
circuit specifically for the air conditioner.
As for the method of wiring, be guided
by the circuit diagram posted on the
inside of control cover.
2
The screw which fasten the wiring in the
casing of electrical fittings are liable to
come loose from vibrations to which the
unit is subjected during the course of
transportation. Check them and make
sure that they are all tightly fastened. (If
they are loose, it could cause burn-out of
the wires.)
3
Specification of power source.
4
Confirm that electrical capacity is
sufficient.
5
See that the starting voltage is
maintained at more than 90 percent of
the rated voltage marked on the name
plate.
6
Confirm that the cable thickness is as
specified in the power source
specification. (Particularly note the
relation between cable length and
thickness.)
7
Always install an earth leakage circuit
breaker in a wet or moist area.
8
The following would be caused by
voltage drop.
- Vibration of a magnetic switch, which
will damage the contact point, fuse
breaking, disturbance of the normal
function of the overload.
9
The means for disconnection from a
power supply shall be incorporated in the
fixed wiring and have an air gap contact
separation of at least 3 mm in each
active(phase) conductors.
10
Open the terminal cover block before
connecting the indoor side wire.
47