59 Dewpoint sensor (optional)
60 Air outlet dewpoint sensor
61 Air inlet solenoid valve
62 Back pressure valve (optional)
63 Backflow preventer with liquid level sensor (optional)
64 Ball valve
4.2 Description of the ozone generation system OZONFILT
®
OZVb
4.2.1 Air conditioning system (air conditioning unit, optional)
OZVb systems with the identity code design "Cooling” - “1” or “3”
are equipped with an air conditioning unit. The air conditioning unit
regulates the temperature of the electrical components in the con‐
trol cabinet to a pre-set temperature by the mechanical tempera‐
ture controller (17).
The control cabinet's temperature control indirectly also monitors
the operation of the air conditioning unit.
4.2.2 The drying unit of the OZONFILT
®
OZVb 1-4 A
The system requires compressed, de-oiled or oil-free compressed
air at the inlet of the pressure regulating valve (27). A detailed
description of the pressure range, quality of compressed air and
temperature can be found in the "Technical data” chapter. Fit a
filter assembly with automatic condensation drainage between the
compressed air system and the inlet of the pressure regulating
valve (27) when operating compressed air systems, which are fed
by oil-greased compressors. The filter assembly should consist of
at least one particle filter and an oil filter and is optionally available
– see identity code.
The compressed and, if necessary, de-oiled compressed air
passes through the pressure regulating valve with pressure sensor
(1) to the inlet of the solenoid valve block (39). Ensure that there is
a constant system priming pressure set on the pressure regulating
valve (27). The pressure at the inlet is monitored by an electronic
pressure switch and needs to be a minimum of 4.5 bar; an alarm is
emitted in the event of lower pressure. The system priming pres‐
sure can be read on the pressure sensor on the outside of the cab‐
inet. The permissible values can be found in the "Technical data”
chapter.
Before the compressed air can be used for ozone generation, it
has to be dried by the pressure swing dryer integrated within the
system to a dewpoint of approx. 60 °C. The gas flows for the pres‐
sure swing dryer are controlled by the solenoid valve block (39).
This is fed by the control (70) with the relevant electrical signals.
The storage tanks (26) of the pressure swing dryer are filled with a
drying agent that draws out the residual moisture from the com‐
pressed air. The two drying units (26) alternate between a drying
and a regeneration phase. This operating mode ensures that the
ozone generator is permanently supplied with dry air for ozone
generation. Compressed ambient air flows through the storage
tank (26), which is used for drying, in the direction of the ozone
generator.
Components of the system and their function
18