SR971,SR972 Solar station operation manual
-------------------------------------------------------------------------------------------------------------------------------------
50
7.12 Holiday function
Functional description:
This function activates at night, solar liquid will flow from storage tank to collector,by this
reversed circulation tank’s temperature will be reduced in night, this prevents solar system
from high thermal loads problem which caused by completely heated storage tank. The
function is activated at night between 10 pm and 6 am, when the collector temperature drops
8
o
C below the storage tank temperature (T2), solar circuit pump starts to release heat by
reversed circulation, when the temperature of collector is 2
o
C below the tank temperature,
and solar circuit pump is ceased.
Activate this function if:
You intend to be absent for an extended period (holiday)
No hot water is required for an extended period.
When the temperature in bottom of storage tank drops below 35
o
C.
Activate/ deactivate this function:
►Press “ ” button for a long time until the signal of holiday function displays on the
screen, and then holiday function is activated.
►Repress “ ” button, signal disappears, holiday function is deactivated.
Note:
This function is only activated when you are not at home for long time, when you come back;
please make sure to deactivate it.
7.13
Manual
heating
Functional decription:
Electrical heater, gas or oil boiler can be as back-up devices in a solar system, this controller
can be used as a thermostat, when controller gets temperature signal from top of tank (T3)
is 2
o
C below the preset temperature, back-up heating device will be triggered. When
temperature of top part tank (T3) reaches to the preset temperature, heating is ceased.
