Instruction of SR81 Split Pressurized Solar Hot Water System
Page 16 of 59
At the case that solar energy is insufficient to heat the tank, in order to ensure user has
sufficient hot water, controller will check the temperature of tank automatically at the preset
time, if tank’s temperature is not reached to the desired temperature, then back-up heat
device will be triggered, and when tank’s temperature rises up to the desired value, then
back-up heat device stops.
Factory set:
（
impossible to be adjusted
）
Default at 13:00 of the first time section to trigger the back-up heat device to heat tank to
30
o
C,
Default at 14:00 of the second time section to trigger the back-up heat device to heat
tank to 35
o
C,
Default at 15:00 of the third time section to trigger the back-up heat device to heat tank
to 40
o
C,
Default at 16:00 of the forth time section to trigger the back-up heat device to heat tank
to 45
o
C,
Default at 17:00 of the fifth time section to trigger the back-up heat device to heat tank to
50
o
C.
Note
：
If larger power electrical heater (larger than 1500KW) is used, according to the power, we
suggest configuring a contactor and a safety protection device, we suggest strongly installing
an accessory “SR802” (see detailed in item No.12)
Menu Structure
Main
menu
Subm
enu
Factory
set
Adjustable
range
Step
per
adjust
Description
THET
Timing heating function
