Electric Heater Rod; Setting The Time; Parameter Level; Setting Parameters - STIEBEL ELTRON WWS 20 Bedienung Und Installation

OPERATION
Menu structure
Note
The relay in the inverter must meet the following re-
quirements:
- Potential-free relay (240 V AC / 24 V DC, 1 A) with
N/O contact
- Adherence to safety regulations and standards for
safety extra low voltage
- The switching output must be programmed so that
the relay closes or opens if certain limits are exceed-
ed or undershot (inverter output level).
If necessary, check with the inverter manufacturer wheth-
er the product meets the stated criteria.
4.7

Electric heater rod

When there is an increased demand for hot water or quick heat-up,
you can also install an immersion heater in your DHW cylinder,
depending on your hydraulic connection.
Note
However, you cannot install an immersion heater if you
heat your DHW cylinder via an inlet pipe (see chapter
"Connection to the DHW cylinder").
The immersion heater controls the temperature in the DHW cyl-
inder to the DHW set value, independently of the heat pump or
any other heat sources.
During the pasteurisation function, the immersion heater controls
the pasteurisation set value.
Immersion heater configuration
Note
The immersion heater is not registered by the control
unit and not visible in the menu structure until you set
"Parameter A01 = 3".
Symbol Parameter Description
PSEt A01 Registering the immersion heater
└ SEt
0 = Not installed (factory setting)
3 = Immersion heater installed in the DHW cylinder
Auto Immersion heater mode selection
oFF = Immersion heater switched off (factory setting)
Auto = Automatic mode (according to the period
DHW heating is enabled)
PSEt E01 Immersion heater start temperature
└ SEt
(factory setting = 0.0 °C)
E02 Immersion heater stop temperature
(temperature differential to DHW set value)
(factory setting = 0.0 K)
b03 Select the heat source for quick heat-up
0 = Heat pump only (factory setting)
1 = Heat pump and immersion heater
Note
At outputs up to 2 kW, the immersion heater can be con-
nected directly to the junction box. An external contactor
is required for outputs above 2 kW.
f The immersion heater should only be installed in the f
DHW cylinder by a qualified contractor.
46 | WWS 20
4.8

Setting the time

To select the current time, proceed as follows:
f Press the Menu button. f
The DHW heating menu appears.
f Press the Up button until you reach the time setting menu. f
The current time is displayed.
f Press the OK button. f
The hour display flashes.
f Set the current hour using the Up/Down buttons. f
f Press the OK button. f
The minute display flashes.
f Set the current minute using the Up/Down buttons. f
f Confirm your selection with the OK button. f
Note
f You will need to set the time again following a long f
power interruption.
4.9

Parameter level

4.9.1 Setting parameters

Parameter Description
A01 Configuring the immersion heater
0 = Not installed (factory setting)
3 = Immersion heater installed in the DHW cylinder
A02 Configuring contact F1
1 = Control sensor in DHW cylinder (factory setting)
0 = Switching input for external heat demand
A03 Function of switching input E2
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
3 = External fan control:
K3 open = Fan switched off, no DHW demand
K3 closed = Fan operates at set speed
b01 DHW set value following defrost error (error code Er47)
Immersion heater takes over DHW heating
5...60 (factory setting = 38 °C)
b02 Maximum pasteurisation function heat-up time
1...8 (factory setting = 4.0 hours)
b03 Select the heat source for quick heat-up
0 = Heat pump only (factory setting)
1 = Heat pump and immersion heater
E01 Immersion heater start temperature
0...60 (factory setting = 0.0 °C)
E02 Immersion heater stop temperature
(temperature differential to DHW set value)
0...30 (factory setting = 0.0 K)
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