Maintenance / Repair; Water Circuit / Condensate Drain; Air Circuit Supply - Dimplex DHW 300D Gebrauchsanweisung

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 availa-
ble or when a temperature limit value is exceeded, either on the
collector or in the cylinder. The solar thermal function has priority
over heat pump operation and the flange heater.
ATTENTION!
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 plant (700 W
power consumption heat pump plus base load of the household).
The solar thermal function has priority over the photovoltaic func-
tion. 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

ATTENTION!
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 main-
tenance.
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 in-
stalled 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 contamination,
and cleaned if necessary.

8.2 Air circuit supply

Maintenance work is limited to cleaning the evaporator on a reg-
ular basis and as required.
ATTENTION!
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.
ATTENTION!
The device must be de-energised before it can be opened.
451905.66.02 · FD 9506
DHW 300D - DHW 300D+
EN-13