Description Of The Product; General Description; Operating Principle - DeDietrich AWHP 4MR–EMC 24/28 MI HYBRIDE User Manual

4 Description of the product

4 Description of the product
4.1

General description

4.2

Operating principle

20
The hybrid heat pump comprises:
an indoor module for the production of heating circuit water
a reversible outdoor unit for the production of energy in heating mode
and in cooling mode.
The indoor module comprises:
a hydraulic module, which groups together the functions for the heat
pump's indoor module
a wall-mounted condensing gas boiler, installed on the front of the hy­
draulic module
The indoor module and the outdoor unit are connected by means of refrig­
erant and electrical connections.
The system offers the following advantages:
An extremely compact solution which can be easily integrated into the
most confined areas of any residence.
The heating circuit is housed in the insulated volume within the home.
Thanks to the DC inverter system, the hybrid heat pump modulates its
output to adapt to the needs of the residence.
The control system uses the outside sensor to adjust the temperature of
the heating circuit according to the outside temperature.
The outer casing of the hydraulic module is made of painted steel sheet­
ing.
Heat pumps in the Alezio G hybrid range extract heat from the air and re­
turn it to the heating circuit via the refrigerant. The efficiency of a heat
pump is expressed in the form of a coefficient of performance (COP), de­
fined as the ratio between the heat provided and the power consumed.
The heat pump comprises an evaporator, a compressor, a condenser and
an expansion valve. The indoor module includes the condenser. The other
components (evaporator, compressor and expansion valve) are located in
the outdoor unit.
1. The refrigerant fluid in this circuit is converted from the liquid state to
the gaseous state in the evaporator, making it possible to recover heat
from the air.
2. The compressor increases the fluid pressure, which thus increases
the temperature.
3. In the condenser, the fluid transfers the heat to the heating circuit
while converting to the liquid state.
4. The refrigerant passes through the thermostatic expansion valve and
returns to the initial state at low pressure and low temperature before
returning to the evaporator.
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