EKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62570-1A – 01.2011
Installation manual
18
6.10. Piping insulation
The complete water circuit, inclusive all piping, must be insulated to
prevent condensation during cooling operation and reduction of the
heating and cooling capacity.
If the temperature is higher than 30°C and the humidity is higher than
RH 80%, then the thickness of the sealing materials should be at
least 20 mm in order to avoid condensation on the surface of the
sealing.
7.
E
LECTRICAL
WIRING
WORK
7.1.
Precautions on electrical wiring work
7.2.
Internal wiring - Parts table
Refer to the internal wiring diagram supplied with the unit (on the
inside of the indoor unit switch box cover). The abbreviations used
are listed below.
A1P ........................ Main PCB
A2P ........................ User interface PCB
A3P ................ * ..... Thermostat (EKRTW/R) (PC=Power Circuit)
(optional)
A3P ................ * ..... Solar pump station PCB (EKSR3PA) (optional)
A4P ................ * ..... Digital I/O PCB (EKRP1HB) (optional)
A4P ................ * ..... Receiver PCB (EKRTR) (optional)
BSK................ * ..... Solar pump station relay (EKSR3PA) (optional)
E1H ........................ Backup heater element 1
E2H ........................ Backup heater element 2
E3H ........................ Backup heater element 3
E4H ............### ..... Booster heater (3 kW)
(1)
F1B,F3B................. Fuse backup heater
F2B ............### ..... Fuse booster heater
(2)
F1T......................... Thermal fuse backup heater (250 V, 100°C)
FU1 ........................ Fuse 3.15 A T 250 V for PCB
FU2 ........................ Fuse 5 A T 250 V
FuR,FuS................. Fuse 5 A 250 V for digital I/O PCB
K1M........................ Contactor backup heater step 1
K2M........................ Contactor backup heater step 2
K3M............### ..... Contactor booster heater
(3)
K4M........................ Pump relay
K5M,K6M ............... Contactor for backup heater all pole
disconnection
M1P........................ Pump
M2S..............## ..... 2-way valve for cooling mode (field supply)
M3S................# ..... 3-way valve: floor heating/domestic hot water
PHC1 ..................... Optocoupler input circuit
Q1DI,Q2DI ............. Earth leakage circuit breaker (field supply)
Q1L ........................ Thermal protector backup heater
Q2L,Q3L ....### ..... Thermal protector booster heater
R1H................ * ..... Humidity sensor (EKRTR) (optional)
R1T ................ * ..... Ambient sensor (EKRTR and EKRTW) (optional)
R1T ........................ Outlet water heat exchanger thermistor
R2T ................ * ..... External sensor (floor or ambient) (EKRTETS)
(optional)
R2T ........................ Outlet water backup heater thermistor
R3T ........................ Refrigerant liquid side thermistor
R4T ........................ Inlet water thermistor
R5T ................# ..... Domestic hot water thermistor
S1L......................... Flow switch
S2S ........................ Benefit kWh rate power supply contact
S3S ........................ Dual set point 2 contact
S4S ........................ Dual set point 1 contact
SS1 ........................ DIP switch
TR1 ........................ Transformer 24 V for PCB
V1S ........................ Spark suppression 1
V2S ........................ Spark suppression 2
X1M~X9M .............. Terminal blocks
X6Y,X9B ................. Connector
WARNING: Electrical installation
All field wiring and components must be installed by an
installer and must comply with the applicable legislation
NOTICE: Electrical wiring work recommendations.
To persons in charge of electrical wiring work:
Do not operate the unit until the refrigerant piping is
complete. Running the unit before the piping is ready will
break the compressor.
DANGER: ELECTRICAL SHOCK
See
"2. General safety precautions" on page 2
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 the
applicable legislation.
■
Use only copper wires.
■
All 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 be sure that it
does not come in contact with the non-insulated
piping and sharp edges. Be sure no external pressure
is applied to the terminal connections.
■
Power supply wires must be attached securely.
■
If the power supply has a missing or wrong N-phase,
equipment will break down.
■
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 the applicable legislation. Failure to
do so may cause electric shock or fire.
■
Be sure to use a dedicated power circuit, never use a
power supply shared by another appliance.
■
Be sure to install the required fuses or circuit
breakers.
(1) Only applicable for tank with built-in electrical booster heater (EKHW*).
(2) Only applicable for tank with built-in electrical booster heater (EKHW*).
(3) Only applicable for tank with built-in electrical booster heater (EKHW*).
*
Optional
#
Applications with domestic hot water tank only.
##
Heating/cooling applications only
###
Delivered with the domestic hot water tank
(a)
.
(a) Only applicable for tank with built-in electrical booster heater
(EKHW*).
