7 Installation
Installer reference guide
40
RRLQ004~008CA + RHBH/X04+08CB
ROTEX HPSU low temperature Bi‑bloc
4P384979-1C – 2017.04
3×
1 2 3
6
Install the switch box cover.
7.9.6
To connect the electrical wiring on the
indoor unit
1
To open the indoor unit, see
"7.2.3 To open the indoor unit" on
page 29
.
2
Wiring should enter the unit from the bottom.
3
Routing of the wiring inside the unit should be as follows:
a
b
c
a
b
c
INFORMATION
When installing field supply or option cables, foresee
sufficient cable length. This will make it possible to remove/
reposition the switch box and gain access to other
components during service.
Routing
Possible cables (depending on unit type and installed options)
a
Low voltage
▪ Preferential power supply contact
▪ User interface
▪ Domestic hot water tank thermistor (option)
▪ Power consumption digital inputs (field supply)
▪ Outdoor ambient temperature sensor (option)
▪ Electrical meters (field supply)
▪ Safety thermostat (field supply)
b
High voltage power supply
▪ Interconnection cable
▪ Normal kWh rate power supply
▪ Preferential kWh rate power supply
▪ Power supply for backup heater
▪ Power supply for bottom plate heater (option)
▪ Power supply for booster heater (to indoor unit)
▪ Power supply for booster heater and thermal protection (from indoor unit)
c
High voltage control signal
▪ Heat pump convector (option)
▪ Room thermostat (option)
▪ 3-way valve
▪ Shut-off valve (field supply)
▪ Domestic hot water pump (field supply)
▪ Alarm output
▪ Changeover to external heat source control
▪ Space heat/cool operation control
4
Fix the cable with cable ties to the cable tie mountings to
ensure strain relief and to make sure that it does NOT come in
contact with the piping and sharp edges.
CAUTION
Do NOT push or place redundant cable length in the unit.
7.9.7
To connect the main power supply
1
Connect the main power supply.
In case of normal kWh rate power supply
