Description; Safety And Control Devices - Dimplex Dhw 301P Montage- Und Gebrauchsanweisungen

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2. Description

2.1. General
The domestic hot water heat pump's main compo-
nents are a domestic hot water cylinder, the compo-
nents of the refrigerant, air and water circuits and the
control, regulation and monitoring devices required for
automatic operation.
The domestic hot water heat pump is supplied with
electrical energy and uses the heat stored in the in-
take air for domestic hot water preparation. The op-
tional internal heat exchanger (DHW 301P+) can be
connected to additional heat generators such as boil-
ers and solar energy systems. The devices are
equipped with an electric heating element as stand-
ard (1.2 kW).
The temperature of the intake air from the heat source
acts as the reference value for the energy consump-
tion, the domestic hot water preparation heat-up time
and domestic hot water temperature. For this reason,
an air duct system (DN160, max. length 6 m (flexible
pipe max. 12 m rigid pipe) can be connected to the
standard spigot of the domestic hot water heat pump
for targeted
waste heat recovery.
For the heat pump to be operated effectively, air short
circuits between the intake air and the outlet air must
always be avoided. For example, this can be achieved
by using a bend on the intake and outlet side.
Falling outlet air temperatures reduce the heat
pump's heat output and increase the heat-up time. In
order for the heat pump to be operated economically,
the air intake temperature should not fall below 15 °C.
2.2. The electric heating performs the following
functions:
Supplementary heating

The "Boost" setting enables domestic hot water
preparation to be carried out with
support from the electric heating for a certain pe-
riod.
Emergency heating

In the event of a heat pump fault, the domestic
hot water supply is maintained by the electric
heating.
Preventative thermal disinfection

Domestic hot water temperatures above 60 °C (up
to 65 °C) can be programmed by selecting "ANTI-
BACT." in the menu using the operator panel key-
pad.
Reheating

Water temperatures over 60 °C are achieved with
the electric heating.
EN-6
2.3.

Safety and control devices

The domestic hot water heat pump is equipped with
the following safety devices:
High pressure switch (HP)
The high pressure switch protects the heat pump
against unacceptably high operating pressure in the
refrigerant circuit and switches the heat pump off in
the event of a fault. The heat pump restarts with a
time delay once the pressure in the refrigerant circuit
has dropped again.
Safety temperature limiter for electric heating (STL)
The STL prevents unacceptably high temperatures
from developing in the domestic hot water cylinder.
The electric heating switches off if the set switching
value (99 °C) is exceeded.
The electric heating cannot be switched on again until
the domestic hot water temperature has decreased
to≤ 90 °C and the reset button on the STL (under
flange cover) is pressed (this must only be done by
qualified personnel).
Reset button (85°C) for
safety temperature
limiter (STL).
FD 0303
Description
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