INSTALLATION
Preparation
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HPA-O CS Plus |
11
9.4 Installing the supply lines
Note
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Do not route the heating flow and return pipes
through the gravel bed below the appliance.
The supply lines are all electric cables plus the heating flow and
return lines.
- To facilitate connection to the appliance, we recommend
using flexible supply lines in the case of outdoor installation.
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Use only weatherproof cables, e.g. NYY.
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Protect the flow and return lines against frost with sufficient
thermal insulation. Provide thermal insulation in accordance
with applicable regulations.
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Also protect all supply lines against humidity, damage and
UV radiation by means of a conduit.
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Protect all pipe fixings and external wall ducts with anti-vi-
bration insulation.
9.5 WPM heat pump manager
A WPM heat pump manager is required to operate the appliance.
This controls the entire heating system. The heat pump manager
is installed in the products defined as required accessories (see
chapter "Installation / Appliance description / Accessories").
9.6 Buffer cylinder
!
Material losses
A buffer cylinder with diffusion-proof insulation is essen-
tial to enable cooling by means of fan convectors.
Note
If cooling is provided via an area heating system, the
buffer cylinder is not required.
We recommend the use of a buffer cylinder to ensure trouble-free
appliance operation.
The buffer cylinder provides hydraulic separation of the volume
flows in the heat pump circuit and heating circuit, and also serves
as an energy source for defrosting.
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If operating without a buffer cylinder, observe the details in
chapter "Commissioning / Ensuring a minimum flow rate".
Note
For operation without a buffer cylinder, we recommend
installing an electric emergency/auxiliary heater (NHZ).
There is an emergency/auxiliary heater in the products
required as accessories (see chapter “Installation / Ap-
pliance description / Accessories”).
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If you do not install an emergency/auxiliary heater,
activate the WW LEARNING FUNCTION parameter in
the WPM heat pump manager for fault-free opera-
tion.
9.7 Preparing the electrical installation
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with national and regional regulations.
WARNING Electrocution
The connection to the power supply must be in the form
of a permanent connection. Ensure the appliance can be
separated from the power supply by an isolator that dis-
connects all poles with at least 3 mm contact separation.
This requirement can be met by contactors, isolators,
fuses, etc.
!
Material losses
The specified voltage must match the mains power sup-
ply.
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Observe the type plate.
!
Material losses
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Provide separate fuses for the two power circuits
(for the appliance and the control unit).
Note
The appliance includes an inverter for the variable speed
compressor. In the event of a fault, inverters can cause
DC residual currents. If RCDs are provided, they must be
type B AC/DC-sensitive.
A DC residual current can block type A RCDs.
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Ensure that the appliance power supply is discon-
nected from the distribution board.
The electrical data can be found in the chapter "Specification". You
require a J-Y (St) 2x2x0.8 mm² cable as a BUS cable.
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Use cables with the relevant cross-sections. Observe the ap-
plicable national and regional regulations.
HPA-O 3 CS Plus | HPA-O 4 CS Plus
Fuse protec-
tion
Assignment
Cable cross-section
1x B 16 A
Compressor
(single phase)
2.5 mm² for routing through a wall
1.5 mm² when routing on a wall or in an
electrical conduit on a wall
1x B 16 A
Control unit
1.5 mm²
HPA-O 6 CS Plus | HPA-O 8 CS Plus
Fuse protec-
tion
Assignment
Cable cross-section
1x B 25 A
Compressor
(single phase)
≥ 2.5 mm²
Alternatively:
1x B 16 A
Compressor
(single phase)
≥ 2.5 mm²
1x B 16 A
Control unit
1.5 mm²
You can safeguard the compressor using the alternative, smaller
fuse protection.