Carrier 53KHET 12 Installation Manual page 43

CONNECTING ELECTRICAL WIRING (Cont.)
18-2 ELECTRICAL WIRING BETWEEN INDOOR UNIT, OUTDOOR UNIT
AND CIRCUIT BREAKER OF AIR CONDITIONER
WARNING
All electrical works including selection, installation of circuit breaker of air conditioner and
all electrical connections between the outdoor unit, indoor unit and circuit breaker are the
!
responsibility of the qualified installer and must be done according to national electrical
wiring regulations to avoid fire due to short circuiting.
- Both of the outdoor and indoor units leave the factory with complete internal electrical wiring.
Do not change any internal electrical wiring of both units.
- It is very important before making the electrical connections between the indoor, outdoor units,
and the power supply, to pay attention to the following safety instructions:
(A) Operating Voltage
The operating voltage of electrical power supply should be within the limits of voltage mentioned on
unit nameplate data shown on the indoor and outdoor units of the air conditioner.
(B) Field Electrical Connection Cables
* Do not use electrical connection cables except the approved one for use with air conditioners.
* Each cable should be a complete unit, without extensions.
* Do not use extension cables, If extension cables are needed, use terminal block.
(C) Electrical Connections
a. Electrical connections must be performed in compliance with national and local wiring codes and
standards.
b. Check that the electrical connections between the terminal blocks of indoor and outdoor units are in
accordance with the wiring diagrams and caution field electrical wiring contained in the manual.
Miswiring may cause malfunction of the system and an electric shock.
c. Do not connect wires when power is ON.
d. Make ground connection prior to any other electrical connections in accordance with the electrical
local codes.
e. Make electrical connections between outdoor and indoor units prior to proceeding to mains supply
connection.
f. Before proceeding with the unit connection to the mains supply locates live L and neutral N, then
make connections as shown in the wiring diagram.
Be sure that the live and neutral wire connected respectively to the Live (L) and the Neutral (N)
terminals of terminal block of outdoor units.
g. Ensure that mains supply connection is made through a switch that disconnects all poles, with
contact gap of at least 3 mm.
Avoid slack connections of the electrical cables when
h.
connected to the terminal blocks of indoor and outdoor
units. and also to circuit breaker These slack connections
lead to voltage drop and unit malfunctions. Every wire
must be connected firmly.
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