EKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62570-1A – 01.2011
Installation manual
20
Connection of the indoor unit power supply and
communication cable
Power circuit and cable requirements
Power supply for the indoor unit is to be provided through the outdoor
unit. Data communication with the outdoor unit is provided through
the same cable.
For all guidelines and specifications regarding field wiring between
the indoor unit and the outdoor unit, please refer to the outdoor unit
installation manual.
Procedure
1
Using the appropriate cable, connect the power circuit to the
appropriate terminals as shown on the wiring diagram and the
illustration below.
2
Connect the earth conductor (yellow/green) to the earthing
screw on the switch box mounting plate.
3
Fix the cable with cable ties to the cable tie mountings to ensure
strain relief.
4
When routing out cables, make sure that these do not obstruct
mounting of the indoor unit cover, see
Note: only relevant field wiring is shown.
Connection of the backup heater power supply
Power circuit and cable requirements
This power circuit must be protected with the required safety devices
according to the applicable legislation.
Select the power cable in accordance with the applicable legislation.
For the maximum running current of the backup heater, refer to the
table below.
(1)(2)
Procedure
1
Using the appropriate cable, connect the power circuit to the
main circuit breaker as shown on the wiring diagram and the
illustration below.
2
Connect the earth conductor (yellow/green) to the earthing
screw on the X1M terminal.
3
Fix the cable with cable ties to the cable tie mountings to ensure
strain relief.
Note: only relevant field wiring is shown.
X3M
X1M
1 2 3
1
3
2
1
2
3
CAUTION
Use a dedicated power circuit for the backup heater and
booster heater
(a)
. Never use a power circuit shared by
another appliance.
(a) Only applicable for tank with built-in electrical booster heater (EKHW*).
Indoor unit model
Backup
heater
capacity
Backup heater
nominal
voltage
Maximum
running
current
Z
max
(
Ω
)
EKHB*008BB3V3
3 kW
1x 230 V
13 A
—
EKHB*008BB6V3
(a)(b)
(a) Equipment complying with EN/IEC 61000-3-12
(b) This equipment complies with EN/IEC 61000-3-11
provided that the system
impedance Z
sys
is less than or equal to Z
max
at the interface point between the
user's supply and the public system. It is the responsibility of the installer or user
of the equipment to ensure, by consultation with the distribution network operator
if necessary, that the equipment is connected only to a supply with a system
impedance Z
sys
less than or equal to Z
max
.
6 kW
1x 230 V
26 A
0.29
EKHB*008BB6WN
6 kW
3x 400 V
8.6 A
—
EKHB*008BB9WN
9 kW
3x 400 V
13 A
—
EKHB*008BB6T1
6 kW
3x 230 V
15 A
—
9 kW
3x 230 V
23 A
—
(1) European/International Technical Standard setting the limits for harmonic
currents produced by equipment connected to public low-voltage systems
with input current >16 A and
≤
75 A per phase.
(2) European/International Technical Standard setting the limits for voltage
changes, voltage fluctuations and flicker in public low-voltage supply
systems for equipment with rated current
≤
75 A.
3x 230 V
3x 400 V
1x 230 V
L1
N
L1
L2
L3
N
L1
N
X1M
X1M
X3M
L1 L2 L3
