Solar working station operation manual SR881
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3.Function operation and parameter setup (user grade)
3.1 Timing heating
Description:
Electrical heater, gas boiler or oil boiler can be integrated into solar system used as back-up
of system, and they can be triggered automatically at preset schedule by preset temperature.
Within a preset schedule, when the temperature (T3) of top part of tank drops below the
preset switching-on temperature of this function, back-up heating starts to work, when T3
rises up to the preset turning off temperature, back-up heating is stopped. Within 24 hours,
three time sections can be set with this controller.
Factory set:
The first schedule: back-up heating function starts at 4:00 and ends at 5:00 am. Within this
time section, switch-on temperature is 40
o
C; switch-off temperature is 45
o
C.
The second schedule: from 10:00 to 10:00 am, it means there is no back-up heating in this
time.
The third schedule: back-up heating function starts at 17:00 and ends at 22:00 pm. Within
this time section, the switch-on temperature is 50
o
C; switch-off temperature is 55
o
C.
The switch-on temperature adjustable range: 10
o
C ~ (OFF-2
o
C)
The switch-off temperature adjustable range: (ON+2
o
C) ~ 80
o
C
If you want to shut off one timing heating, then you can set the turning on time and turning
off time same value (for example, the second time section no this function, then you can set
turning on/off time is 10:00 ~ 10:00)
When time is outside of the preset schedule, back-
up heating doesn’t work automatically
even when the tank temperature reaches the switch
–on temperature of heating.
Note:
When there is no sensor installed in the top part of tank (no T3 sensor), controller will
take the signal of T2 (sensor in bottom of tank) automatically to control this function.
The time in this controlled is 24 hours, when you set schedule, the switch-off time of
heating should be larger than switch-on time. For example: if you set the switch-on
time of heating is at 17:00, but switch-off time of heating is 6:00, then this setting
doesn’t take effect, that means within this time section, heating function doesn’t work.
