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After emptying, please replace the nut of
drainpipe.
Close
Drainpipe shut-off valve
4.2 Trial- running
4.2.1 Checking list before commisionning.
1)
Checking list before trial-running.
2)
Correct installation of the system.
Correct connection of water/air piping and wiring;.
3)
Condensate draining smoothly well insulation work for all
4)
hydraulic part.
5)
Correct power supply.
No air in the water pipeline and all valves opened.
6)
7)
Effective electric leakage protector installation.
8)
Sufficient inlet water pressure (between 0.15MPa and 0.65MPa).
4.2.2 About Running
System Structure Figure
1)
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.
Water outlet
Temperature sensor(T5U)
Temperature sensor(T5L)
Electric heater
Water inlet
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.
Emptying
Fig.4-2
Tank
Fig.4-3
3)
Modes will be automatically selected by unit. manually mode
selection is unavailable.
Running Temperature Range
Setting water temperature target range: 38~70ºC.
E-heater running ambient temperature range: -20~45ºC.
Heat pump running ambient temperature range: -7~43ºC.
Water temperature limits:
Ambient
T4＜-7
Temp.(T4)
Max.Temp.
--
(Heat pump)
Max. Temp.
70
(E-heater)
4)
Heat Source Shift
The default heating source is heat pump.
If ambient is range out of heat pump, heat pump will stop
running, the unit will shift automatically to activate E-heater,
then if the ambient temperature goes into the running range of
heat pump again, it will stop E-heater and shift automatically to
heat pump again.
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 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.
E-heater will be activated once for the
current heating progress, if want to apply
E-heater again, plsease push the
button to switch E-HEATER mode.
If system occurs some malfunctions, error code "E7" and
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
If only use E-heater, about only 75 liters
water will be heated, so must set higher
target water temperature if ambient
temperature 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(when the ambient temperature is below 5℃), the fan motor
will stop, but compressor will still run.
Heat-up Time
There are different heat-up times in different ambient tempera-
ture. Normally lower ambient temperature result longer heat-up
time because of lower effective performance.
10
-7≤T4＜-2 -2≤T4＜2 2≤T4＜43 43≤T4
60
70
45
70
70
70
NOTE
will be shown until power off.
NOTE
Table.4-1
--
70
will
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