External Controlled Hot Water Production; Use Of Solar Cell Function; Use Of Holiday Function - SWISSTHERM VT167 OHE Bedienungs Und Installationsanleitung Handbuch

EXTERNAL CONTROLLED HOT WATER PRODUCTION

USE OF SOLAR CELL FUNCTION

To activate the external controlled hot water production, use the menu "Solarcel and then on/off". See also page 11.
When selecting solar cells as external controlled hot water production it will override the normal hot water production
control and automatically adjust hardware configuration to "HP-EL" in the menu "H.Pump".
Through terminal CN6 connector 5 and 7 there are 4 options to choose from for supplementary heating. See
"electrical diagram at page 10"
None (both 7 and 4 are open). The status menu shows "SolarCel"
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Only heat pump (7 are closed and 4 are open). The status menu shows "Only HP"
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Only electrical heating element (7 are open and 4 are closed) The status menu shows "Only EL"
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With both heat pump and electrical heating element (both 7 and 4 are closed). The status menu shows
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"HP+EL"
The Setpoint for "only HP" are managed through the menu "SC-HP" and can be adjusted from 5°C – Tmax.
Standard setup is 52°C
The Setpoint for "only EL" are managed through the menu "SC-EL" and can be adjusted from 5°C – Tmax.
Standard setup is 53°C
If the solar function is not activated then it will change to normal hot water production with the settings of the normal
Setpoint function.
The heat pump runs with a hysteresis of +1 -3°C around Setpoint. The supplementary heating runs with a hysteresis
of +-1°C.
When connecting solar cells and thus the inverters please have in mind that they must have gold contacts because of
the low current in the terminal.

USE OF HOLIDAY FUNCTION

With the use of the holiday function you are able to lower the power consumption during your holiday and away from
home. When activated, the hot water production will stop and the temperature lowers to "T2 min". See page 11.
As standard it will lower to 10°C for keeping the system in a frost free environment. When the temperature goes
below "T2 min" -1°C the supplementary heating will start. If the temperature goes further below "T2 min" -3°C the
heat pump will also start. When the temperature reaches "T2 min" +1°C the hot water production stops.
There are 5 choices to choose from when you want to activate the holiday function.
1 week
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2 weeks
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3 weeks
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3 days, for an extra-long weekend
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Manually setting of days (1 – 99)*
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*There will be an uncertainty of -+3% when using manually setting of days.
21 days = +- 0.6 days
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50 days= +- 1.5 days
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99 days= +- 3.0 days
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