Description Of The Machine - Brune Dehumid BT Notice D'utilisation Et D'entretien

3. DESCRIPTION OF THE MACHINE

FUNCTIONING
This dehumidifier is a refrigerating cycle dehumidifier: its functioning is based on a physical principle according to which the air,
coming into contact with a cooled surface, it wets the surface by covering it with humidity in the form of condensed drops, or ice
with low ambient temperature. What really happens is that a refrigerating machine maintains in a refrigerated state the coil through
which is conveyed the incoming air that, in this way, is cooled and dehumidified. Then the air, passing through a warm heat-
exchanger, heats up and returns in the room dehumidified and at a slightly higher temperature.
Fig. 1
Machines with water
tank gravity stop
With reference to the drawing (fig. 1), the air is drawn in through the back side of the dehumidifier, then it passes through the filter
(1), through the aluminium refrigerated coil or evaporator (2), again trough the heat- exchanger or condenser (3). Finally, the
motor fan (4) expels the air back into the room through the front grilled panel: The condensed water is collected in the tank (5). A
micro-switch (6) stops the machine when the water in the tank reaches a precise weight and presses the tank down. The
humidistat (7) starts the functioning of the dehumidifier when the humidity his higher than the present level. An electronic circuit
(8) controls the defrosting and prevents the compressor (9) repeated starts within too short a time by delaying each new start.
Hot Gas Defrosting System
The models with hot gas defrosting system have one by-pass solenoid valve and a special electronic card.
The functioning of Hot Gas Defrosting is an exclusive Fral system for the dehumidifiers: this system consists of a thermostat and
one electronic control, which use the hot gas by-pass system only when it is necessary and for the period of time required; this will
lengthen the life of the machine by reducing the hot gas functioning phases.