Maintenance / Repair; Water Circuit / Condensate Drain; Air Circuit Supply - Dimplex DHW 300D Instructions De Montage Et D'utilisation

DHW 300D - DHW 300D+
7.3.4 Solar thermal function
As an alternative to using a 2nd heat generator, the domestic
hot water heat pump can be operated in combination with a
thermal solar installation. As soon as a sufficient solar yield is
detected, it is used for domestic hot water preparation and the
heat pump is blocked. The hystereses can be set in the menu.
The circulating pump is switched off again when a solar gain is
no longer available or when a temperature limit value is ex-
ceeded, either on the collector or in the cylinder. The solar ther-
mal function has priority over heat pump operation and the
electric heater.
CAUTION!
The collector sensor must be a temperature sensor with the
resistance characteristic curve of a PT1000 (see Cap. 2.4.2 on
pag. 4).
7.3.5 Photovoltaic function
For the photovoltaic function, the terminal X8 must be fed with
230 V 50 Hz. The evaluation unit (e.g. inverter checker) meas-
ures the output that is currently available. If the photovoltaic
input is active, the heat pump controls to the setpoint for the PV
mode. 1 kW can be used as a setting reference point for the
power threshold in the inverter checker of the photovoltaic
plants during PV operation without electric heater (700 W
power consumption heat pump plus base load of the house-
hold). If the device is to work permanently with the electric
heater in PV operation, a setting reference point of 2.5 kW is ad-
visable (2200 W power consumption heat pump incl. electric
heater, plus base load of the building). The solar thermal func-
tion has priority over the photovoltaic function. The display
shows that the heat pump is being operated using electricity
from the photovoltaic installation.
NOTE
The domestic hot water set temperature in photovoltaic mode
should be set to max. 55 °C to guarantee efficient operation of
the heat pump.
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8

Maintenance / repair

CAUTION!
Disconnect the power supply before opening the domestic
hot water heat pump; possible fan coasting must be
considered.
General
The domestic hot water heat pump is extremely low mainte-
nance. Furthermore, a one-off visual inspection for possible
leaks in the water system and clogging of the condensate drain
must be carried out a few days after commissioning.
The refrigeration circuit of the heat pump does not require
maintenance.
Only use a damp cloth with a little soap solution to clean the do-
mestic hot water heat pump.

8.1 Water circuit / condensate drain

The water circuit check is limited to filters that may have been
installed on site and possible leakages. Dirty water filters should
be cleaned and, if necessary, replaced. The seal valve in the end
of the condensate hose must only be checked for contamina-
tion, and cleaned if necessary.

8.2 Air circuit supply

Maintenance work is limited to cleaning the evaporator on a
regular basis and as required.
CAUTION!
Risk of injury caused by sharp-edged fins. Fins must not be
deformed or damaged!
If air filters are used, they should be regularly checked for con-
tamination and be cleaned and replaced if required.
CAUTION!
The device must be de-energised before it can be opened.
CAUTION!
The terminal X8 can also be energized when the heat pump is
in switched-off state
451905.66.02a · FD 0102
English
EN-13