AIR-SEP
Pressure Maintenance with AIR-SEP
SmartControl
6
KOREX Benelux B.V.
2.1
Function Description
The AIR-SEP
unit is a pressure maintenance station for heating, cooling and refrigeration systems. It performs the functions
of the
pressure maintenance, expansion, degassing
and
resupply
with water and / or water-glycol mixtures. The unit
consists of at least one valves and control section (A2) - including a touch screen with a colour display (8) - and a degassing
and expansion tank (A1).
2.1.1 Pressure Maintenance
The pressure monitoring in the plant system takes place via the pressure sensor (19). AIR-SEP
thereby ensures that the
system pressure is optimally maintained at all times.
If the water cools, the pressure in the plant system falls. On undershooting the set pressure, the pressure maintenance pump
(10) is switched on and feeds the already degassed water from the expansion tank (A1) back into the system via the pressure
maintenance connection (3). The pressure in the plant system increases. On reaching the desired system pressure, the pump
- controlled by the pressure sensor - is switched off again.
2.1.2 Expansion
The pressure in the plant system is increased by increases in temperature. On exceeding the set pressure, the overflow valve
(11) is opened and allows water to flow out of the system via the expansion line (4) and into the expansion tank (A1) which is
closed to the atmosphere. The pressure in the system falls to the set value setting and the overflow valve (11) is closed again.
The expanded water is collected in the expansion tank (A1) and used again later for pressure maintenance. The entire
hydraulic pipework, including the valves and control section (A2), is mounted on the expansion tank (A1). Optionally, several
expansion tanks
–
also with a second valves and control section - can be connected.
2.1.3 Degassing
For the degassing of the system water, two hydraulic connections
“
ON (4)
”
and
“
OFF (3)
”
are needed. The
“
ON
”
line feeds the
gas-rich water to the AIR-SEP
unit. The
“
OFF
”
line is a return line to the system for the degassed water. During the
degassing, the pump (10) and the overflow valve (11) are in operation. Thereby, a gas-rich partial flow of the system water is
fed via the pressure-less expansion tank. Here, the free and dissolved gases are separated from the water by the atmospheric
pressure and reliably purged via the degassing valve with an air non-return lock (14). The overflow valve (11) guarantees the
hydraulic balancing though the control of the valve stroke. The repetitive processes degas the system efficiently and invasive
air is repeatedly separated out. The degassing takes place in the operating modes: resupply, expansion and in the interval and
fast degassing.
2.1.4 Resupply
If the minimum water level in the expansion tank is fallen below, the resupply valve is opened (18) for so long until the desired
water supply, monitored by the level switch on the water gauge glass (12), has been reached again. In doing so, the refill
quantities, frequency or capacities of softening or deionization are checked and monitored.
2.1.5 Cleaning
In the settling area of the degassing and expansion tank (A1), salts, minerals and suspended particles are deposited. In
addition, the optional magnetite filter (AS-MF) fixes all the magnetic particles in the tank. The sludge and magnetite can be
permanently removed from the system via the cleaning opening (13). This serves for the protection of all the components in
your system circuit (such as, for example, efficiency pumps, valves, packing glands, etc.) and guarantees the continuous safe
operation of the plant.
