Operating Mode; Off, Auto, On; Language; Option, Drainback - Stiebel Eltron SOM 6 PLUS Utilisation Et Installation

2.6.18 Operating mode

HND1
Operating mode
Setting range:

OFF, AUTO, ON

Factory setting: AUTO

2.6.19 Language)

LANG:
Language setting
Setting range: dE, En
Factory setting: dE
[German]
2.6.20 Units
EINH: Selection of
temperature unit
Setting range: °F, °C
Factory setting: °C
2.6.21 Reset
RESE: Reset function

2.6.22 Option, drainback

Note
A drainback system requires additional components, for example a container to catch the heat transfer medium. Only enable the drainback
option if all required components have been installed correctly.
The drainback option is only available for systems with one cylinder and one collector array (system type 1, 2, 3, 8 and 9).
In a drainback system, the heat transfer medium is pumped into a container during times when the collector is not able to operate. The drainback
option triggers the filling of the collector, as soon as solar heating begins.
ODB: Option, drainback
Setting range: OFF / ON
Factory setting: OFF
tDTE: Period, start condition
Setting range: 1 ... 100 s
Factory setting: 60 s
tFLL: Filling time
Setting range: 1 ... 30 min
Factory setting: 5 min
tSTB: Stabilisation time
Setting range:

1.0 ... 15.0 min

Factory setting: 2 min.
28
The controller operating mode may be set manually for inspection and service work.
For this, select the setting value HND1 that allows the following inputs:
• HND1/HND2
Operating mode
OFF : Relay OFF
AUTO: Relay in automatic control mode
ON : Relay ON
The language for the menus is set in this channel.
• dE : german
• En : english
With this parameter you determine the unit for displaying temperatures.
$(-'
SET
°"
The reset function returns all parameters to their factory settings. Press key 3
1$2$
(centre) to initiate a reset. All manually made adjustments are lost through the reset.
SET
For this reason, you will always be asked for confirmation by means of a security
prompt. Confirm the security prompt if you are sure that you want to return the
appliance to its factory settings.
If the drainback option has been selected, the pump operates for the time set
.#!
under tFLL at 100% speed and pumps the heat transfer medium from the con-
SET
.%%
tainer into the collector circuit (solar thermal system). After the filling time tFLL
has expired, the pump speed will be reduced to the value selected under nMN.
The shutdown conditions are ignored for the stabilisation period that you can
select under tSTB. This ensures that the system is not shut down prematurely.
Parameter tDTE enables a period to be determined during which the start con-
ditions must be met continuously.
Parameters tDTE, tFLL and tSTB must be set following the selection of the drain-
back option.
Starting the drainback option automatically changes the temperature diffe-
rential parameters DT E, DT A and DT S. In addition, the setting range and the
default value for the collector temperature limit NOT are changed.
After selecting the drainback option, the cooling functions OKK, OSYK and OSPK
as well as the frost protection function OKF are no longer available. If one of
these functions was previously enabled, it will be disabled by the drainback
function and will also not be reinstated at the end of drainback.
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!
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