6 Installation
Installer reference guide
11
07C2V3
ROTEX HPSU monobloc compact outdoor unit
4P501827-1 – 2017.08
▪ Because 350 l is more than 150 l, the expansion vessel is NOT
appropriate for the installation. Therefore the system requires an
external expansion vessel.
5.4
Preparing electrical wiring
5.4.1
About preparing electrical wiring
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
WARNING
▪ If the power supply has a missing or wrong N-phase,
equipment might break down.
▪ Establish proper earthing. Do NOT earth the unit to a
utility pipe, surge absorber, or telephone earth.
Incomplete earthing may cause electrical shock.
▪ Install the required fuses or circuit breakers.
▪ Secure the electrical wiring with cable ties so that the
cables do NOT come in contact with sharp edges or
piping, particularly on the high-pressure side.
▪ Do NOT use taped wires, stranded conductor wires,
extension cords, or connections from a star system.
They can cause overheating, electrical shock or fire.
▪ Do NOT install a phase advancing capacitor, because
this unit is equipped with an inverter. A phase
advancing capacitor will reduce performance and may
cause accidents.
WARNING
▪ All wiring must be performed by an authorised
electrician and must comply with the applicable
legislation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on the site and all electrical
construction
must
comply
with
the
applicable
legislation.
WARNING
The backup heater MUST have a dedicated power supply
and MUST be protected by the safety devices required by
the applicable legislation.
WARNING
ALWAYS use multicore cable for power supply cables.
5.4.2
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.
2
3
4
1
a
b
a
Outdoor unit
b
HPSU monobloc tank
Item
Description
Wires
Maximum
running
current
Outdoor unit power supply
1
Power supply for
outdoor unit
2+GND
(a)
Optional equipment
2
Remote outdoor sensor 2
(b)
Field-supplied components
3
Shut-off valve
2
(b)
Interconnection cable
4
Interconnection cable
between outdoor unit
and HPSU monobloc
tank
2
(c)
(a)
Refer to name plate on outdoor unit.
(b)
Minimum cable section 0.75 mm².
(c)
Cable section 1.5 mm²; maximum length: 20 m.
NOTICE
▪ More
technical
specifications
of
the
different
connections are indicated on the inside of the outdoor
unit and the HPSU monobloc tank.
▪ For how to connect the electrical wiring to the HPSU
monobloc tank, refer to the installation manual of the
tank.
6
Installation
6.1
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:
▪ Mounting the outdoor unit
▪ Connecting the water piping
▪ Connecting the electrical wiring
▪ Finishing the installation of the outdoor unit
6.2
Opening the units
6.2.1
About opening the units
At certain times, you have to open the unit.
Example:
▪ 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.
6.2.2
To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
