6 Preparation
Installer reference guide
28
RRLQ004~008CA + RHBH/X04+08CB
ROTEX HPSU low temperature Bi‑bloc
4P384979-1C – 2017.04
6.5.3
Overview of electrical connections except
external actuators
Normal power
supply
Preferential kWh rate power supply
Power supply is
NOT interrupted
Power supply is
interrupted
1
580
1 50
0
0
2
a
3
1
4
580
1 50
0
0
2
b
3
During preferential
kWh rate power
supply activation,
power supply is NOT
interrupted. The
outdoor unit is turned
off by the control.
Remark:
The
electricity company
must always allow the
power consumption
of the indoor unit.
5 3
a
b
1
4
580
1 50
0
0
580
1 50
0
0
2
During preferential
kWh rate power
supply activation,
power supply is
interrupted
immediately or after
some time by the
electricity company.
In this case, the
indoor unit must be
powered by a
separate normal
power supply.
a
Normal power supply
b
Preferential kWh rate power supply
1
Power supply for outdoor unit
2
Power supply and interconnection cable to indoor unit
3
Power supply for backup heater
4
Preferential kWh rate power supply (voltage free contact)
5
Normal kWh rate power supply (to power the indoor unit
PCB in the event of power supply interruption of the
preferential kWh rate power supply)
6.5.4
Overview of electrical connections for
external and internal actuators
The following illustration shows the required field wiring.
INFORMATION
The following illustration is an example and might NOT
match your system layout.
M
M
6
7
c
15
20
d
e
8 10
a
9 18
12
21
22
b
19
14
13
16
17
a
Single power supply for outdoor unit, backup heater and
booster heater
b
Backup heater
c
Indoor unit
d
Domestic hot water tank
e
Booster heater
Item
Description
Wires
Maximum
running
current
Outdoor unit and indoor unit power supply
1
Power supply for
outdoor unit
2+GND or
3+GND
(a)
2
Power supply and
interconnection cable to
indoor unit
3
(c)
3
Power supply for
backup heater
See table below. —
4
Preferential kWh rate
power supply (voltage
free contact)
2
(e)
5
Normal kWh rate power
supply
2
6.3 A
User interface
6
User interface
2
(f)
Optional equipment
7
3‑way valve
3
100 mA
(b)
8
Power supply for
booster heater and
thermal protection
(from indoor unit)
4+GND
(c)
9
Power supply for
booster heater (to
indoor unit)
2+GND
13 A
10
Domestic hot water
tank thermistor
2
(d)
11
Power supply for
bottom plate heater
2
(b)
12
Room thermostat
3 or 4
100 mA
(b)
13
Outdoor ambient
temperature sensor
2
(b)
14
Heat pump convector
4
100 mA
(b)
Field supplied components
15
Shut-off valve
2
100 mA
(b)
16
Electricity meter
2 (per meter)
(b)
17
Domestic hot water
pump
2
(b)
18
Alarm output
2
(b)
19
Changeover to external
heat source control
2
(b)
20
Space cool/heat
operation control
2
(b)
21
Power consumption
digital inputs
2 (per input
signal)
(b)
22
Safety thermostat
2
(e)
(a)
Refer to name plate on outdoor unit.
(b)
Minimum cable section 0.75 mm².
(c)
Cable section 2.5 mm².
(d)
The thermistor and connection wire (12 m) are delivered
with the domestic hot water tank.
(e)
Cable section 0.75 mm² till 1.25 mm²; maximum length:
50 m. Voltage-free contact shall ensure the minimum
applicable load of 15 V DC, 10 mA.
(f)
Cable section 0.75 mm² till 1.25 mm²; maximum length:
500 m. Applicable for both single user interface and dual
user interface connection.
NOTICE
More technical specifications of the different connections
are indicated on the inside of the indoor unit.
