Installation manual
15
EKHBRD011~0Y17
Indoor unit for air to water heat pump system
4P402191-1B – 2017.09
E
LECTRICAL
WIRING
WORK
Precautions on electrical wiring work
Internal wiring - Parts table
Refer to the internal wiring diagram supplied with the unit. The
abbreviations used are listed below.
switch box components list
A1P............................ Main PCB
A2P............................ Remote controller PCB (user interface)
A3P............................ Control PCB
A4P......................* .... Inverter PCB
A4P..................... # .... Inverter control PCB
A5P......................* .... QA PCB
A5P..................... # .... Inverter PCB
A6P............................ Filter PCB
A7P............................ Digital I/O PCB (optional)
A8P............................ Demand PCB (optional)
A10P.......................... Thermostat PCB (optional)
A11P.......................... Receiver PCB (optional)
B1PH ......................... High pressure sensor
B1PL.......................... Low pressure sensor
BS1~BS4 (A4P).. # .... Push button
BSK ........................... Solar pump station relay (optional)
(EKSRPS3)
C1 ........................* .... Capacitor
C1,C2 ................. # .... Filter capacitor
C1,C2 (A5P) ....... # .... PCB capacitor
C1~C3 (A4P) .......* .... PCB capacitor
C2,C3 ..................* .... Filter capacitor
DS1 (A*P) .................. DIP switch
E7H ........................... Bottom plate heater (only in combination with
ERRQ* outdoor unit or ERSQ* outdoor unit
with option EKBPHTH16A)
E1HC ......................... Crankcase heater
F1,F2 .................. # .... Inline fuse
F1U (A1P,A3P) .......... Fuse (T, 3.15 A, 250 V)
F1U (A6P) ...........* .... Fuse (T, 6.3 A, 250 V)
F1U,F2U (A4P)... # .... Fuse (31.5 A, 500 V)
F1U,F2U (A7P).......... Fuse (5 A, 250 V) (optional)
F3U,F4U ..............* .... Fuse (T, 6.3 A, 250 V)
F3U,F6U (A4P)... # .... Fuse (6.3 A, 250 V)
H1P~H7P (A4P) . # .... PCB LED
HAP (A*P) ................. PCB LED
IPM1 ....................* .... Integrated power module
K1A............................ Interface relay
K1E,K2E .................... Electronic expansion valve
K1M,K2M............ # .... PCB contactor
K*R (A*P) .................. PCB relay
K1S............................ 3-way valve (optional)
M1C ........................... Compressor
M1F,M2F.................... Switch box cooling fan
M1P ........................... DC inverter pump
PC (A11P) ................. Power circuit (optional)
PHC1 ......................... Optocoupler input circuit
PS (A*P) .................... Switching power supply
Q1DI,Q2DI................. Earth leakage protector (field supply)
Q2L............................ Thermal protector water piping
R1 (A5P)............. # .... Resistance
R1,R2 (A4P) ........* .... Resistance
R1L ......................* .... Reactor
R1L~R3L ............ # .... Reactor
R1H ........................... Humidity sensor (optional) (EKRTR)
R1T............................ Ambient sensor (optional) (EKRTW/R)
R2T............................ Domestic hot water tank thermistor (EKHTS*)
(optional)
R2T............................ External sensor (floor or ambient)
(EKRTETS*) (optional)
R3T............................ Liquid thermistor R410A
WARNING
■
A main switch or other means for disconnection,
having a contact separation in all poles, must be
incorporated in the fixed wiring in accordance with
relevant local and national regulations.
■
Switch off the power supply before making any
connections.
■
Use only copper wires.
■
All field wiring and components must be installed by a
licensed electrician and must comply with relevant
European and national regulations.
■
Be sure to install the required fuses as mentioned on
the electrical wiring diagram.
■
The field wiring must be carried out in accordance
with the wiring diagram supplied with the unit and the
instructions given below.
■
Never squeeze bundled cables and make sure that it
does not come in contact with the piping and sharp
edges.
Make sure no external pressure is applied to the
terminal connections.
■
Be sure to use a dedicated power supply. Never use a
power supply shared by another appliance.
■
Be sure to establish an earth. Do not earth the unit to
a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
■
Be sure to install an earth leakage protector in
accordance with relevant local and national
regulations. Failure to do so may cause electrical
shock.
When installing the earth leakage protector make sure
that it is compatible with the inverter (resistant to high
frequency electrical noise) to avoid unnecessary
opening of the earth leakage protector.
■
As this unit is equipped with an inverter, installing a
phase advancing capacitor not only will deteriorate
power factor improvement effect, but also may cause
capacitor abnormal heating accident due to high-
frequency waves. Therefore, never install a phase
advancing capacitor.
■
Be sure that after installation work all the rubber
bushings are put back in place to protect the wires
from touching sharp edges.
For V17 models only
■
Equipment complying with EN/IEC 61000-3-12
(a)
■
This equipment complies with EN/IEC 61000-3-11
(b)
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
.
(a) 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.
(b) 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.
011
014
016
Z
max
=
0.34
Ω
0.32
Ω
0.32
Ω
4PEN402191-1B_2017_09.book Page 15 Friday, October 6, 2017 7:03 PM
