■
■
8
■
A
F
■
B
C
G
■
■
D
E
H
I
■
■
2
3
■
4
5
6
7
9
2
■
(a)
(b)
(c)
(d)
1
2
Field wiring
Overview
The
illustration below gives an overview of the required field wiring
between several parts of the installation. Refer also to "Typical
WARNING
application examples" on page 7.
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 laws and regulations.
I
D
■
Switch off the power supply before making any
connections.
B
C
4
T
E
■
Use only copper wires.
3
5
■
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.
6
M
M
F
G
H
■
All field wiring and components must be installed by a
1
2
7
I
licensed electrician and must comply with relevant
local laws and regulations.
The field wiring must be carried out in accordance
with the wiring diagram supplied with the unit and the
A 10 9
instructions given below.
Be sure to use a dedicated power supply. Never use a
Single power supply for
unit, backup heater and
3-way valve for domestic
hot water tank (field
power supply shared by another appliance.
booster heater
supply, optional)
Be sure to establish a ground. Do not ground the unit
to a utility pipe, surge absorber, or telephone ground.
Incomplete ground may cause electrical shock.
Unit
Backup heater
2-way valve for cooling
mode (field supply,
optional)
Be sure to install a ground fault circuit interrupter
(30 mA). Failure to do so may cause electrical shock.
Be sure to install the required fuses or circuit
breakers.
User interface
Room thermostat (field
supply, optional)
Domestic hot water tank
(optional)
Booster heater
(optional)
Precautions on electrical wiring work
AC/
Required
number of
Maximum
running
Fix cables so that cables do not make contact with the pipes
(especially on high pressure side).
Item
1
Description
Power supply cable for unit
DC
AC
conductors
2+GND
current
(a)
Secure the electrical wiring with cable ties as shown in figure 2
so that it does not come in contact with the piping, particularly
on the high-pressure side.
Power supply cable for backup
heater
Room thermostat cable
AC
AC
2+GND
3 or 4
(b)
100 mA
(c)
Make sure no external pressure is applied to the terminal
connectors.
User interface cable
3-way valve control cable
DC
AC
2
2+GND
100 mA
(d)
100 mA
(c)
■
When installing the ground fault circuit interrupter make sure
2-way valve control cable
AC
2+GND
100 mA
(c)
that it is compatible with the inverter (resistant to high frequency
Booster heater power supply
AC
4+GND
(b)
electrical noise) to avoid unnecessary opening of the ground
and thermal protection cable
fault circuit interrupter.
8
Thermistor cable
DC
2
(e)
NOTE
The ground fault circuit interrupter must be a high-
Booster heater power supply
cable
AC
2+GND
13 A
speed type breaker of 30 mA (<0.1 s).
10
Benefit kWh rate power supply
DC
100 mA
(f)
cable (voltage free contact)
As this unit is equipped with an inverter, installing a phase
Refer to nameplate on outdoor unit
advancing capacitor not only will deteriorate power factor
improvement effect, but also may cause capacitor abnormal
See table under "Connection of the backup heater power supply" on page 19.
Minimum cable section AWG18 (0.75 mm
2
)
Cable section AWG18 till AWG16 (0.75 mm
2
till 1.25 mm
2
), maximum length:
heating accident due to high-frequency waves. Therefore, never
1640 ft (500 m).
install a phase advancing capacitor.
(e) The thermistor and connection wire (40 ft (12 m)) are delivered with the domestic
hot water tank.
(f) Cable section AWG18 till AWG16 (0.75~1.25 mm
2
), maximum length: 1640 ft
(500 m). Voltage free contact shall ensure the minimum applicable load of
15 V DC, 10 mA.
Knock out hole for unit power
supply cable entry
Knock out hole for backup
heater power supply cable
EDLQ036~054B EBLQ036~054BA6VJU1
Unit for air to water heat pump system
4PW56182-1
2
1
3
4
3
4
entry
Cap for low voltage cables
entry (<30 V)
Knock out holes for other
power cables entry
Installation manual
17
