7 Installation
Installer reference guide
28
RRLQ004~008CA + RHBH/X04+08CB
ROTEX HPSU low temperature Bi‑bloc
4P384979-1 – 2015.01
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)
(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
use interface connection.
NOTICE
More technical specifications of the different connections
are indicated on the inside of the indoor unit.
Backup heater
type
Power supply
Required number of
conductors
*3V
1× 230 V
2+GND
*9W
1× 230 V
2+GND + 2 bridges
3× 230 V
3+GND + 1 bridge
3× 400 V
4+GND
7
Installation
7.1
Overview: Installation
This chapter describes what you have to do and know on-site to
install the system.
Typical workflow
Installation typically consists of the following stages:
1
Mounting the outdoor unit.
2
Mounting the indoor unit.
3
Connecting the refrigerant piping.
4
Checking the refrigerant piping.
5
Charging refrigerant.
6
Connecting the water piping.
7
Connecting the electrical wiring.
8
Finishing the outdoor installation.
9
Finishing the indoor installation.
INFORMATION
Depending on the units and/or the installation conditions, it
might be necessary to connect electrical wiring before you
can charge refrigerant.
7.2
Opening the units
7.2.1
About opening the units
At certain times, you have to open the unit.
Example:
▪ When connecting the refrigerant piping
▪ When connecting the electrical wiring
▪ When maintaining or servicing the unit
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover
is removed.
7.2.2
To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
1×
1
2
2
