Midea 190RDN3-E, Инструкция по установке и эксплуатации

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7
Installation & Owner‘s Manual
Fig.5-2
Emptying
Drainpipe shut-off valve
Close
After emptying, please replace the nut of
drainpipe.
5.2 Trial- running
5.2.1 Check list before commissioning.
1) Check list before trial-running.
2) Correct installation of the system.
3) Correct connection of water/air piping and wiring.
4) Condensate draining smoothly well insulated for all hydraulic
part.
5) Correct power supply.
6) No air in the
water pipeline and all valves opened.
7) Effective RCD installed.
8) Sufficient inlet water pressure (between 0.15MPa and 0.65MPa)
(150-650kPa).
5.2.2 About Running
1) System Structure Figure
This unit has two kinds of heat sources: Heat pump
(compressor) and electric heater.
The unit will automatically select heat sources to heat water to
the target temperature in different mode.
2) Water Temperature Display
The temperature shown on the display depends on the water
temperature sensor. It is normal that sometimes the display tempera-
ture decreases while the unit is running, it is caused when the
natural convection of the upper hot wate mixes with by the bottom
cold water which flows from inlet tap.
3) Operating mode should be selected manually. Refer to table 5-1.
Running Temperature Range
Water temperature limits:
Tank
Water temperature sensor
Electric heater
Water inlet
Water outlet
Fig.5-3
③
Defrosting During Water-heating
In heat pump running period, if the evaporator becomes frosted in
lower ambient temperature, the system will defrost automatically
to keep effective performance (about 5~15min). At defrosting time,
the compressor will stop, but fan motor will still run.
④
Heat-up Time
There are different heat-up times at different ambient tempera-
tures. Normally lower ambient temperature result in longer heat-up
times because of lower effective performance.
4) Heat Source Shift
①
The default heating source is heat pump.
If ambient temperature range is out of heat pump operating range,
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 ambient
temperature 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.
②
If the target water temperature is higher than maxinum tempera-
ture (Heat pump), the unit will activate heat pump firstly to the
maxinum temperature, then stop heat pump, activate E-heater to
continually heat water to the target temperature.
NOTE
If only using E-heater mode, approx 60% of the tank water will be
heated, so set a higher target water temperature if the ambient
temperature is out of the heat pump running range.
NOTE
If the system continuously reports heat pump protection, the latest
error code and will be shown on the display, then heat pump will
stop running, and the unit will shift automatically to E-heater mode
as the backup mode, but the code and will be shown until power
is reset.
--
65
Ambient temp.
range
Maxinum
temp.
(Heat pump)
Table 5-1
Setting temp.
range
Operation
mode
Economy mode
Hybrid mode
E-heater mode
5~43
-20~43
-20~43
38~70
38~65
38~70
65