4 Installation
Installation manual
8
RBLQ011~016CAW1
ROTEX HPSU monobloc compact outdoor unit
4P537991-1 – 2018.08
4.3.2
To insulate the water piping
The piping in the complete water circuit MUST be insulated to
prevent condensation during cooling operation and reduction of the
heating and cooling capacity.
To prevent the freezing of the outdoor water piping during winter
time, the thickness of the sealing material MUST be at least 13 mm
(with λ=0.039 W/mK).
If the temperature is higher than 30°C and the humidity is higher
than RH 80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
During winter, protect the water piping and shut‑off valves against
freezing by adding heat tape (field supply). If the outdoor
temperature can drop below –20°C and no heat tape is used, it is
recommended to install the shut‑off valves indoors.
4.4
Connecting the electrical wiring
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
4.4.1
To connect the electrical wiring on the
outdoor unit
1
Remove the switch box cover. See
"4.1.1 To open the outdoor
unit" on page 5
.
2
Insert the wiring at the back of the unit:
a
b
c
≥25 mm
a
Low voltage cable
b
High voltage cable
c
Power supply cable
NOTICE
The distance between the high voltage and low voltage
cables should be at least 25 mm.
Routing
Possible cables (depends on the installed
options)
a
Low voltage
▪ Interconnection cable to HPSU monobloc
tank
▪ Remote outdoor sensor (option)
b
High voltage
▪ Shut-off valve (field supply)
c
Main power supply
▪ Main power supply
3
Inside the unit, route the wiring as follows:
b
a
a
Power supply cable
b
Cable tie
4
Make sure that the cable does NOT come in contact with sharp
edges or hot gas piping.
5
Install the switch box cover.
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.
CAUTION
Do NOT push or place redundant cable length in the unit.
4.4.2
To connect the main power supply
1
Connect the main power supply.
1 2 3 L1 L2 L3 N
X1M
a
a
Power supply cable (including earth)
4.4.3
To connect the remote outdoor sensor
1
2
10 mm
