Installation Manual -
B-VMH09,12,18,24DU-1
23
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, examples of such
are T5A/250VAC and T10A/250VAC.
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 connections may
cause electrical malfunction, injury, or fire.
An independent circuit
must be used for
this unit.
DO NOT
plug another appliance or
charger into the same
circuit
. If the
circuit
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.
•
Make sure 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 main power supply connection
is made through a switch that disconnects
all poles, with contact gap of at least 3mm
(0.118”).
•
DO NOT
modify the length of the power
cord or use an extension cord.
CAUTION
•
Connect the outdoor wires before
connecting the indoor wires.
•
Make sure 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.
•
Make sure 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.
Outdoor Unit Wiring
WARNING
Before performing any electrical or wiring work,
turn off the main power to the system.
1. Prepare the cable for connection
a. You must first choose the right cable size.
Be sure to use H07RN-F cables.
Table 8.1: Minimum Cross-Sectional Area
of Power Cables in North
America
Rated Current of
Appliance (A)
AWG
≤
7
18
7 - 13
16
13 - 18
14
18 - 25
12
25 - 30
10
8
