Operating Principal And Main Components; Power Inverter System - BWT 100M Montage- Und Bedienungsanleitung

1.

OPERATING PRINCIPAL AND MAIN COMPONENTS

This paragraph describes how BWT heat pumps work. An understanding of the workings of the heat pump will help
you realise the importance of the preparation work that must be carried out before installing, using or maintaining
your heat pump.
A heat transfer fluid (R 410 A) travels in a continuous loop through a copper circuit. As it moves through the circuit it
experiences the following cycle:
1.
captures calories from ambient air as it flows over the fin-type "evaporator". The fan propels
ambient air over aluminium fins covering the copper tubes through which the liquid is flowing; the fluid is
heated by the ambient air which, in turn, is cooled down.
2.
the fluid enters the "compressor", here the fluid pressure is raised significantly thus further increasing its
temperature (all models except the BWT MPI-160 are fitted with a Scroll type compressor)
3.
the fluid passes into the "condenser" or plate type heat exchanger where calories are transferred from the
heat transfer fluid to the pool water, the fluid is cooled while the pool water is heated.
4.
the fluid returns to its initial temperature and pressure in the expansion chamber and the cycle starts again
The compressor and expansion chamber delimit two half-loops:
• the half-loop situated on the condenser side is referred to as the HP or High Pressure loop
• the half-loop situated on the expansion chamber side is referred to as the LP or Low Pressure loop
Pool water
The compressor
pressure of the heat transfer fluid
and thus raising its temperature
further
With an ambient air temperature of 15°C, BWT heat pumps transfer 4 to 5 times more energy to the pool water
than they consume (90% of this energy is consumed by the compressor): these machines have a yield (or COP -
Coefficient of Performance) of between 4 and 6.
1.1

Power Inverter system

On the contrary to the fixed speed (50 Hz) compressor equipping conventional On/Off hat pumps, the speed of the
inverter compressor can vary between 11 and 100 Hz.
Thus, when the ambient air temperature is low, or the heating demand is high, the inverter compressor runs at high
speeds (between 50 and 100 Hz). Inversely, when the heating demand is low, notably when the pool water
CHAUFFAGE & DÉSHUMIDIFICATION
Heat is transferred to the pool
water from the heat transfer
fluid within the plate-type heat
exchanger.
increases the
The fan draws ambient air in from
the outside and over the evaporator
where it heats up the heat transfer
fluid
The expansion chamber decreases the
pressure of the fluid thus lowering its
temperature
2020/11 - Indice de révision : I - Code : 33340
27/96