System Overview Of Field Wiring; Field Wiring Guidelines - Daikin EKHBH008BB Series Installation Manual

7.3. System overview of field wiring
WARNING
■
Switch off the power supply before making any
connections.
■
All field wiring and components must be installed by a
licensed electrician and must comply with the
applicable legislation.
The illustration below gives an overview of the required field wiring
between several parts of the installation. Refer also to
application examples" on page
5
B D E
2
C
4
3 10
1 11
13
A
A Single power supply for outdoor unit, backup heater and
booster heater
B Outdoor unit
C Bottom plate heater
D Backup heater
E Indoor unit
F Room thermostat (optional)
G 3-way valve for domestic hot water tank (optional)
H 2-way valve for cooling mode (field supply)
I Domestic hot water tank (optional)
J Booster heater
K User interface (digital controller)
L Power supply (normal kWh rate power supply: only in case
of benefit kWh rate power supply installation)
(1) For tank without electrical booster heater (EKHTS), the backup heater will
be used in domestic water heating mode.
(2) Only applicable for tank with built-in electrical booster heater (EKHW*).
Installation manual
19
"3.4. Typical
5.
T
F
I
K
12
6
M
7
M
8 9
L
(1)
(2)
Item
1 Power supply cable for outdoor
unit
2 Indoor unit power supply and
communication cable
3 Power cable for bottom plate
heater
4 Power supply cable for backup
heater
5 Room thermostat cable
6 3-way valve control cable
7 2-way valve control cable
8 Booster heater power supply
and thermal protection cable
9 Thermistor cable
10 Booster heater power supply
cable
G
11 Benefit kWh rate power supply
cable (voltage free contact)
H
12 User interface cable
13 Normal kWh rate power supply
(a) Refer to nameplate on outdoor unit.
I
(b) Cable section 2.5 mm
J (c) Bottom plate heater cable is only applicable in combination with ERLQ or
in case of optional EKBPHT kit.
(d) Minimum cable section 0.75 mm
(e) See table under
(f) Only applicable for tank with built-in electrical booster heater (EKHW*).
(g) The thermistor and connection wire (12 m) are delivered with the domestic hot
water tank.
(h) Cable section 0.75 mm
Voltage free contact shall ensure the minimum applicable load of 15 V DC,
10 mA.
(i) Cable section 0.75 mm
CAUTION
Select all cables and wire sizes in accordance with the
applicable legislation.
WARNING
After finishing the electric work, confirm that each electric
part and terminal inside the electric parts box is connected
securely.

Field wiring guidelines

■
Most field wiring on the indoor unit side is to be made on the
terminal block inside the switch box. To gain access to the
terminal block, remove the indoor unit cover and switch box
service panel, see
■
Cable tie mountings are provided at the bottom of the switch
box. Fix all cables using cable ties (field supply).
■
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 manual.
(3) Only applicable for tank with built-in electrical booster heater (EKHW*).
Required
number of
Description conductors
2+GND
3+GND
(c)
2+GND or
3+GND
3 or 4
2+GND
2+GND
4+GND
(f)
2+GND
(f)
2+GND
2
2
"Connection of the backup heater power supply" on page
2 2
till 1.25 mm , maximum length: 50 m.
2 2
till 1.25 mm , maximum length: 500 m.
"5.1. Opening the indoor unit" on page
WARNING
Switch off all power supply – i.e. outdoor unit power
supply and backup heater and domestic hot water
tank power supply (if applicable) – before removing
the switch box service panel.
Indoor unit for air to water heat pump system
Maximum
running current
(a)
(b)
(d)
2
(e)
(d)
100 mA
(d)
100 mA
(d)
100 mA
(b)
(g)
2
13 A
(h)
2
(i)
2
(b)
20.
10.
(3)
.
EKHBH/X008BB
4PW62570-1A – 01.2011