— English Vacuum spray degassing — 20.05.2019
7.2 Setting the minimum operating pressure for Magcontrol
The "P
0
" minimum operating pressure is only directly entered
together with the pressure-dependent regulated make-up at
the Servitec device in systems with an expansion vessel. The
value is determined at the pressure maintenance location.
p
st
Static pressure = static head (h
st
)/10
p
0
Minimum operating
pressure
= p
st
+ 0.2 bar
(recommended)
p
a
Supply pressure (pump
"ON")
= p
0
+ 0.3 bar
Static pressure range
p
e
Final pressure ≤ p
Sv
- 0.5 bar (for p
Sv
≤ 5.0
bar)
p
Sv
Safety valve actuating
pressure
= p
0
+ 1.2 bar (for p
Sv
≤ 5.0
bar)
1.1 x p
0
+ 0.8 bar
T
he calculation of the minimum operating pressure can be directly calculated and saved during initial commissioning using the
Reflex Control Smart app for configuration. Please always check the correct inlet pressure of the expansion vessel in the system.
Proceed as follows:
1. In the app, set the controller to "Magcontrol”.
2. Determine the “P
0
” minimum operating pressure of the device relative to the “p0” initial pressure of the expansion vessel.
The device is installed at the same level as the
expansion vessel (hst = 0).
– P
0
= p0*
The device is installed at a lower level than the
expansion vessel.
– P
0
= p0 + h
st
/10*
The device is installed at a higher level than the
expansion vessel.
– P
0
= p0 - h
st
/10*
p0 in bar, h
st
in m
Note!
Comply with the Reflex planning directive.
During planning, take into account that the working range of the device must be between the "pa" supply
pressure and the "pe" final pressure in the working range of the pressure maintenance system.
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