INSTALLATION
Electrical connection
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WPL ACS classic |
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11. Electrical connection
Note
Observe the operating and installation instructions of the
WPM heat pump manager.
Connection work must only be carried out by a qualified contractor
and in accordance with these instructions.
Permission to connect the appliance may need to be obtained from
the local power supply utility.
11.1 Terminal area
WARNING Electrocution
Before working on the appliance, isolate it from the
power supply at the terminal area.
The terminals are located in the terminal area of the appliance.
Observe chapter "Preparing the electrical installation".
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For all connections, use appropriate cables in accordance
with local regulations.
Access to the terminal area
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Unscrew and remove the two screws.
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Slide the cover down.
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Remove the cover by pivoting it open to the right.
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1 Terminal area
2 Strain relief
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Route cables and leads through the strain relief fittings.
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Terminate the screen at both ends of the bus cable.
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If you wish to use the following appliance functions, install
an electric emergency/booster heater. An emergency/booster
heater is installed in some of the products required as ac-
cessories (see chapter “Installation / Appliance description /
Accessories”).
Appliance func-
tion
Effect of the electric emergency/booster
heater
Mono energetic
operation
If the dual mode point is undershot, the electric emer-
gency/booster heater safeguards both the heating opera-
tion and the delivery of high DHW temperatures.
Emergency mode
Should the heat pump suffer a fault that prevents its con-
tinued operation, the heating output will be covered by
the electric emergency/booster heater.
Heat-up program
(only for underfloor
heating systems)
Where return temperatures are <25 °C, the electric emer-
gency/booster heater must provide the necessary heat for
screed drying.
With these low system temperatures, the drying heat
must not be provided by the heat pump, otherwise the
frost protection of the appliance can no longer be guar-
anteed during the defrost cycle.
Pasteurisation
control
To heat up the water regularly to a temperature of 60 °C
to protect against the growth of legionella bacteria, the
electric emergency/booster heater is started automatical-
ly when pasteurisation control is enabled.
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Connect the cables according to the following diagram.
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Earth the LV lead by inverting the screen over the external
sheath and clamping it under the earth terminal.
Note
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Earth the LV lead either at the outdoor unit or at one
of the products defined as required accessories (see
chapter "Installation / Appliance description / Acces-
sories").
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Then check the function of the strain relief fittings.
