Danfoss DTW 300 SP, Инструкция по установке, обслуживанию и эксплуатации

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tank, and the bottom one is used to measure the lower water temperature. The lower sensor controls the ON &
OFF of the unit, although this temperature is not shown in the display.
1
2
3
4
36
35
Figure 16. Heating elements
Position Explanation
1 Outlet
2 Electrical heater
3 Tank coil (solar coil)
4 Inlet
35 Upper tank sensor (T5U)
36 Lower tank sensor (T5L)
•
Economy mode: in this mode, according to the water temperature setting, the heat pump is in prefer-
ence against the electrical heater (the water outlet temperature range is within 38-60°C, running ambient from
-7°C up to +43°C). If the air temperature is too low, the electrical heater will start even in Economy mode
•
Hybrid mode: in this mode, the system will adjust the working capabilities of the electrical heater and the
unit according to the tank water temperature. (water outlet temperature range is within 38-60°C, running
ambient from -30°C up to +43°C)
•
E-heater mode: in this mode, the compressor and the fan motor will not run, only the electrical heater works.
(the water outlet temperature range is within 38-60°C
，
running ambient between -30°C up to +43°C).
Note! In E-heater mode, only one half tank of water, i.e. 150L, can be heated each time. This due to the
physical position of the electrical heater.
11.4.2 Defrosting during water heating
In the ECONOMY or HYBRID mode, if the evaporation freezes (as a result of cold circumstances), the system will
automatically defrost (3-10 minutes) in order to maintain an effective performance.
11.4.3 Ambient temperature/operating range
The system’s operation temperature is within the range from -30°C up to +43°C. The operation temperature for
each mode is shown below.
•
Economy Mode: From -7°C up to +43°C.
•
Hybrid Mode: From -30°C up to +43°C
•
E-heater Mode: From -30°C up to +43°C
11.4.4 Mode selection
The unit can run in three modes to meet different demands and the following are the recommended selections.
•
ECONOMY mode: From -7°C up to +43°C, a continuous hot water demand below 250L (recommended set
point is 60°C);
•
HYBRID mode: From -30°C up to +43°C, a continuous hot water demand between 300 -350L (recommended
set point is 60°C);
•
E-HEATER mode: From -30°C up to +43°C, a continuous hot water demand up to 150L (recommended set
point is 60°C).
11.4.5 Self-protection apparatuses
•
The unit has an automatic self-protection function where it continuously performs a self-check sequence . If an
error occurs, it will be presented on the display. All kinds of errors will lead to a self-protection state.
•
When this happens, the unit will stop and start the self-check. When the self-check sequence has finished
(without any problems detected), the unit will automatically restart again.
30 – Installation, Service and User Manual VMGFK202