Heat Pump Mode Selection; Operation With External Signal Transmitter - Stiebel Eltron WWS 20 Manuel D'utilisation Et Installation

OPERATION
Menu structure
Example switching diagram:
1 Fan speed curve
4.5

Heat pump mode selection

Symbol Parameter Description
Auto Heat pump mode selection
oFF = Compressor switched off
Auto = Automatic mode (according to the period
DHW heating is enabled)
defr = Manual defrosting of the compressor
(factory setting = Auto)
Note
When the heat pump compressor is switched off, the fan
operates in automatic mode. The heat pump does not
provide any DHW heating.
Note
The heat pump is set to automatic mode at the factory.
4.6

Operation with external signal transmitter

You can switch off the heat pump or set it to a higher set value
using floating switching inputs E2 and E3 (see chapter "Junction
box").
You can configure E2 and E3 via the "Parameter setting" submenu
as follows:
Symbol Parameter Description
PSEt A03 Function of switching input E2
└ SEt
0 = No function (factory setting)
1 = Power supply utility shutdown:
K2 open = Heat pump (and immersion heater)
switched off
K2 closed = Heat pump is running
A04 Function of switching input E3
0 = No function (factory setting)
1 = Power supply utility shutdown:
K2 open = Heat pump (and immersion heater)
switched off
K2 closed = Heat pump is running
2 = Smart Grid function:
K3 open = DHW set value is delivered
K3 closed = Pasteurisation set value is delivered
Note
The compressor has a minimum idle time of 20 minutes.
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4.6.1 Power supply utility shutdown
The heat pump shuts down automatically when:
- Switching input E2 is open
- The set value for DHW temperature has been reached
The display shows the word StOP.
Example switching diagram:
T1 Temperature in the DHW cylinder (sensor F1)
1 Minimum compressor idle time (20 min)
4.6.2 Set value increase
If you have your own photovoltaic system, you can increase the
delivered set value via switching input E3 when you have a low
electricity tariff. This will then deliver the pasteurisation set value
(2) instead of the DHW set value (1).
Example switching diagram:
Note
An external shutdown takes priority over increasing the
set value.
Note
Shutting down the heat pump power supply utility has
no effect on ventilation.
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