3 Preparation
Installation manual
4
07C2V3
ROTEX HPSU monobloc compact outdoor unit
4P501825-1 – 2017.08
3
Preparation
3.1
Preparing the installation site
3.1.1
Installation site requirements of the
outdoor unit
Mind the following spacing guidelines:
≤1200
>250/400
>250/400
>250
>350
>350
(mm)
(mm)
a
b
b
a
a
Air outlet
b
Air inlet
INFORMATION
If shut-off valves are installed on the unit, provide a
minimum space of 400 mm at the air inlet side. If shut‑off
valves are NOT installed on the unit, provide a minimum
space of 250 mm.
The maximum allowable distance between outdoor unit and HPSU
monobloc tank is 10 m.
The outdoor unit is designed for outdoor installation only, and for
ambient temperatures ranging 10~43°C in cooling mode, –25~25°C
in space heating mode, and –25~35°C in domestic hot water
operation mode.
3.2
Preparing water piping
NOTICE
In case of plastic pipes, make sure they are fully oxygen
diffusion tight according to DIN 4726. The diffusion of
oxygen into the piping can lead to excessive corrosion.
3.2.1
To check the water volume and flow rate
Minimum flow rate
Check that the minimum flow rate (required during defrost/backup
heater operation) in the installation is guaranteed in all conditions.
NOTICE
If glycol was added to the water circuit, and the
temperature of the water circuit is low, the flow rate will
NOT be displayed on the user interface. In this case, the
minimum flow rate can be checked by way of the pump
test (check that the user interface does NOT display error
7H).
NOTICE
When circulation in each or certain space heating loops is
controlled by remotely controlled valves, it is important that
the minimum flow rate is guaranteed, even if all valves are
closed. In case the minimum flow rate cannot be reached,
a flow error 7H will be generated (no heating or operation).
See the installer reference guide for more information.
Minimum required flow rate
05+07 models
13 l/min
See the recommended procedure as described in the installation
manual of the HPSU monobloc tank.
Minimum water volume
Check that the total water volume in the installation is minimum
20 litre, the internal water volume of the outdoor unit NOT included.
INFORMATION
In critical processes, or in rooms with a high heat load,
extra water might be required.
NOTICE
When circulation in each space heating/cooling loop is
controlled by remotely controlled valves, it is important that
the minimum water volume is guaranteed, even if all of the
valves are closed.
3.3
Preparing electrical wiring
3.3.1
Overview of electrical connections for
external and internal actuators
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.
4
Installation
4.1
Opening the units
4.1.1
To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
8×
1
2
