EAS ELECTRIC ETHKH160 Manual De Instrucciones página 77

Field wiring guidelines
■ Most field wiring on the unit is to be made on the terminal block
inside the switch box. To gain access to the terminal block,
remove the switch box service panel.
WARNING
Switch off all power supply – i.e. unit power supply and
backup heater and domestic hot water tank power supply (if
applicable) – before removing the switch box service panel.
■ Fix all cables using cable ties.
■ A dedicated power circuit is required for the backup heater.
■ Installations equipped with a domestic hot water tank (optional),
require a dedicated power circuit for the booster heater.
Please refer to the domestic hot water tank Installation & owner's
manual.
Secure the wiring in the order shown below.
■ Lay the electrical wiring so that the front cover does not rise up
when doing wiring work and attach the front cover securely (see
figure).
■ Follow the electric wiring diagram for electrical wiring works (the
electric wiring diagrams are located on the rear side of cover.
■ Form the wires and fix the cover firmly so that the cover may be fit
in properly.
Precautions on wiring of power supply
■ Use a round crimp-style terminal for connection to the power
supply terminal board. In case it cannot be used due to
unavoidable reasons, be sure to observe the following instruction.
- Do not connect wires of different gauge to the same power
supply terminal. (Looseness in the connection may cause
overheating.)
- When connecting wires of the same gauge, connect them
according to the below figure.
■ Use the correct screwdriver to tighten the terminal screws.
Small screwdrivers can damage the screw head and prevent
appropriate tightening.
■ Over-tightening the terminal screws can damage the screws.
■ Attach a ground fault circuit interrupter and fuse to the power
supply line.
■ In wiring, make certain that prescribed wires are used, carry out
complete connections, and fix the wires so that outside forces are
not applied to the terminals.
5.9.3 Specifications of standard wiring components
Equipment main Power Supply Wiring
2 4 6 22
KM1
1 3 5 21
2 4
I> I>
CB1 1 3
RED
BLACK
L N
XT2
LPS
POWER SUPPLY
Maximum overcurrent protector (MOP)
Wiring size
(a) Stated values are maximum values (see electrical data for exact
values).
The ground fault circuit interrupter must be a high-speed
type breaker of 30 mA (<0.1 s).
Flexible cord must meet 60245IEC(H05VV-F) standards.
5.9.3.1 Connection of the backup heater power supply
Power circuit and cable requirements
■ Be sure to use a dedicated power circuit for the backup
heater. Never use a power circuit shared by another
appliance.
■ Use one and same dedicated power supply for the unit,
backup heater and booster heater (domestic hot water
tank).
25
2 4 6 22
KM1
1 3 5 21
2
4 6
I> I>
I>
CB1
1 3 5
L
R E D
B L A C K
N
A B C N
XT2
L P S
A B C N
POWER SUPPLY
1-phase 3-phase
32 25
Wiring size must comply with
the applicable local laws and
regulations
NOTE
V.1
L
N