About Running
1 System Structure Figure
Unit has two kinds of heat sources: Heat pump(compressor)
and electric heater.
Unit will automatically select heat sources to heat water to the
target temperature.
2 Water Temperature Display
The temperature shown on the display depends on the upper
sensor. So it is normal that the display temperature has
reached to target temperature but compressor still running,
because the lower water temperature does not get to target
temperature.
Modes will be automatically selected by unit. manually mode
selection is unavailable.
3 Heat source will be automatically selected by unit. But manually
E-Heater operation is available.
4 Heat Source Shift
The default heating source is heat pump.If externalis range out
of heat pump, heat pump will stop running, the unit will shift
automatically to activate E-heater and show the icon LA on
the display, then if the externaltemperature goes into the
running range of heat pump again, it will stop E-heater and
shift automatically to heat pump again, and the icon LA will be
extinguished.
If the target setting water temperature is higher than Max. temp
(Heat pump), the unit will activate heat pump firstly to the Max.
temperature, then stop heat pump, activate E-heater to
continually heat water to the target temperature.
If manually activate the E-heater running mode when heat pump
running, E-heater and heat pump will work together until the
water temperature gets to target temperature.
So if want to heat quickly, please manually activate E-heater.
Note
E-heater will be activated once for the current heating progress,
if
want
to
apply
E-heater
again
please
push
E-HEATER.
If system occurs some malfunctions, error code "E7" and
, e
will be shown on the display, then heat pump will stop running,
and the unit will activate automatically E-heater as the backup heat
source, but the code "E7" and
will be shown until power off.
If only use E-heater, about only 75 liters water (unit
190S
) will be
heated or about only 150 liters water (unit
300S
), so must set
higher target water temperature if externaltemperature is out of
heat pump running range.
Defrosting During Water-heating
In heat pump running period, if the evaporator frosted in lower
ambient temperature, the system will defrost automatically to keep
effective performance(about 3~10min). At defrosting time, the fan
motor will stop, but compressor will still run.
TCO and ATCO
The power of compressor and E-heater will be automatically shut-
off or turn on by TCO and ATCO.
If the water temperature is higher than 78°C, the ATCO will
automatically shut off the power of compressor and E-heater, and
reconnect it if the temperature falls down below 68°C.
the water temperature is higher than 85°C, the TCO will
automatically shut off the power of compressor and E-heater.
Storage tank
Water outlet
Temperature probe
(T5U)
Electric heater
Water inlet
Temperature probe
(T5L)
9
START-UP