SR981S/SR982S operation manual of solar pump station
Page 37 of 85
7. Functions operation and parameters setup (user grade)
7.1 THET Timing heating
Description:
Electrical heater, gas boiler or oil boiler can be integrated into solar system and used as
back-up heat source; they can be triggered automatically at preset schedule by preset
temperature. Within a preset time section, when the temperature (T3) of top part of tank
drops below the preset switching-on temperature of this function, back-up heating H1
starts to work, when T3 rises up to the preset turning off temperature, back-up heating H1
is stopped. Within 24 hours, three time sections can be set with this controller.
Factory set:
The first time section: back-up heating function starts at 4:00 and ends at 5:00 am.
Within this time section, default switch-on temperature is 40
o
C; default switch-off
temperature is 45
o
C.
The second time section: starts at 10:00 and ends also at 10:00 am, it means no
back-up heating in this time.
The third time section: back-up heating function starts at 17:00 and ends at 22:00 pm.
Within this time section, default switch-on temperature is 50
o
C; default 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 with a same value (for example, the second time section without 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 drops to 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 controller is 24 hours mode, when you set time section, the
switch-off time of heating should be larger than switch-on time. For example: if you
