
Vacuum deaerator
Pneumatex Vento
Version 4, 2017-07-03
Page 3 (4)
AT 8080S
Function and design
Fully automatic vaccum deaerator for liquid-filled heating or cooling systems. The
liquid always contains both dissolved and unresolved gases. The unit's function
is to reduce these gases to an absolute minimum. A separate subflow from the
system is subjected to a vacuum in the unit's deaerating vessel. In this situation
the dissolved gas is released and can be diverted to the atmosphere via the air
deflector. This method provides a highly efficient deaerating in both heating and
cooling systems, even in high buildings and/or low temperatures. The deaerator
should always be mounted in the pipe's main line to get a 100% successful result
on the liquid exchange.
A subflow is taken from the system and pumped into the deaerating vessel. The
solenoid valve, which is in the inlet line, closes within a few seconds. The pump,
that still is in operation, creates a vacuum. Acc. to Henry's law (the liquids natural
solution of gas depends on pressure and temperature), the dissolved gas will be
released and separated from the liquid and acts as free gas bubbles in the top of
the deaerator chamber. In the next phase, the solenoid valve opens again, the
pressure rises and a new part flows into the exhaust gas vessel. The new flowing
subset presses the free gas blowers into the air deflector, on top of the deaerat-
ing chamber and leads them to the atmosphere via the float.
This shifting between having the solenoid valve open or closed causes the deaer-
ating process to continue and the system's fluid becomes increasingly free of dis-
solved gases. In a period of time, usually 2-3 weeks, the amount of dissolved gas
has decreased to a minimum. That´s when the built-in SmartSwitch-component
stops the deaerating process if it does not detect any gas in ten minutes. The
built-in clock does, if neccessary, activate the deaerating process at a certain pre-
set time, usually 8:00 in the morning. However, if no gas is detected, the unit re-
turns to standby mode, ready to restart 24 hours later. This smart feature
minimizes the energy demand and increases the product's life.
All models have the features presented above. The R-models also have an inte-
grated auto-filling equipment. This is controlled by preset start- and stop pres-
sures. It can also be controlled by signals from e.g. level indication on an
expansion vessel. Maximum filling amount, filling time and number of fillings can
be limited.
Technical information
Article
AT
8080S
4A
AT
8080S4
A-R
AT
8080S
6A
AT
8080S6
A-R
AT
8080S1
0A
AT
8080S10
A-R
Operating pressure
(bar) within
1,0 –
4,5 1,0 – 4,5
1,0 –
6,0 1,0 – 6,0
5,0 –
10,0 5,0 – 10,0
Systemvol. max (m3)25 25 300 300 300 300
Systemtemp. (°C) 0 – 90 0 – 90 0 – 90 0 – 90 0 – 90 0 – 90
Max. operating pres-
sure (bar) 10,0 10,0 10,0 10,0 16,0 16,0
Treated fluid (l/h) 70 70 1000 1000 1000 1000
Filling amount(l/h) -50 -450 -500
Noise level (dB(A)) 52 52 57 57 57 57
Voltage (V)
1-
phase
230
1-phase
230
1-
phase
230
1-phase
230
3-fas
400 3-fas 400
Effect (W) 100 100 800 800 1150 1150
Enclosure class (IP) 40 40 40 40 40 40