Installation manual
23
E(D/B)(H/L)Q011~016BB
Unit for air to water heat pump system
4PW67904-1 – 01.2011
9.3.
System overview of field wiring
The illustration below gives an overview of the required field wiring
between several parts of the installation. Refer also to
"3.4. Typical
application examples" on page 4
.
A Single power supply for unit, backup heater and booster
heater
B Unit
C Bottom plate heater EKBPHT
(1)
D Backup heater
(2)
E User interface (digital controller)
F Room thermostat (field supply, optional)
G 3-way valve for domestic hot water tank (field supply,
optional)
H 2-way valve for cooling mode (field supply, optional)
I Domestic hot water tank (optional)
J Booster heater
(3)
K Power supply (normal kWh rate power supply: only in case
of benefit kWh rate power supply installation)
1 Protection cap
2 Entry for cables
3 Entry for low voltage cables (<30 V)
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.
(1) Bottom plate heater is only applicable in combination with E(D/B)LQ or in
case of optional EKBPHT kit.
(2) For tank without electrical booster heater (EKHTS), the backup heater will
be used in domestic water heating mode.
(3) Only applicable for tank with built-in electrical booster heater (EKHW*).
T
M
M
B
1
2
6
4
12
5
7
8
9
C
D
F
I
J
H
G
UI
E
3
A
K
10
11
Item
Description
AC/
DC
Required
number of
conductors
Maximum
running
current
1
Power supply cable for unit
AC
2+GND
(a)
(a) Refer to nameplate on the unit.
2
Power supply cable for backup
heater
AC
2+GND
(b)
(b) See table under
"Connection of the backup heater power supply" on page 24
.
3
Power cable for bottom plate
heater
AC
2
(c)
(c) Minimum cable section 1.5 mm
2
4
Room thermostat cable
AC
3 or 4
100 mA
(d)
(d) Minimum cable section 0.75 mm
2
5
User interface cable
DC
2
100 mA
(e)
(e) Cable section 0.75 till 1.25 mm
2
, maximum length: 500 m.
6
3-way valve control cable
AC
2+GND
100 mA
(d)
7
2-way valve control cable
AC
2+GND
100 mA
(d)
8
Booster heater power supply
and thermal protection cable
(f)
(f)
Only applicable for tank with built-in electrical booster heater (EKHW*).
AC
4+GND
(b)
9
Thermistor cable
DC
2
(g)
(g) The thermistor and connection wire (12 m) are delivered with the domestic hot
water tank.
10
Booster heater power supply
cable
(f)
AC
2+GND
13 A
11
Benefit kWh rate power supply
cable (voltage free contact)
DC
2
100 mA
(h)
(h) Cable section 0.75 till 1.25 mm
2
, maximum length: 500 m. Voltage free contact
shall ensure the minimum applicable load of 15 V DC, 10 mA.
12
Normal kWh rate power supply
AC
2+GND
(i)
(i)
Cable section 2.5 mm
2
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.
3
1
2
