Servitec 35-95 with
— 18.12.2019 - Rev. A
English —
6.3.3.2 Make-up line
1 Servitec 3 "BT" system separator vessel
2
"WV" 2-way motorized ball
valve
4 "ST" dirt trap
For a water make-up via a "BT" mains disconnect receptacle, its bottom edge
must be at least 1000 mm above the "PU" degassing pump.
Various Reflex make-up variants, see chapter 4.6 "Optional equipment and
accessories" on page 6 .
If you do not connect the automatic water make-up, you must close the
connection of the "WC" make-up line with a R ½ " blanking plug and start up the
system in "Levelcontrol" mode.
For external water make-up, note the following conditions:
• Install at least one "ST" dirt trap with a mesh size ≤ 0.25 mm close
upstream to the "WV" 2-way motorized ball valve or use our Fillset.
Note!
When using an external system make
-up, ensure that no Servitec fault
occurs as a result of different operating parameters.
Note!
Use a pressure reducer in the "WC" make
-up line if the idle pressure
6.4 Switching and make-up variants
Select the make-up variant in the Customer menu of the device controller, see
chapter 9.1.1 "Customer menu" on page 18 .
Choose from one of the following make-up variants in the Customer menu:
• Pressure-dependent "Magcontrol" make-up.
– In a facility system with diaphragm expansion tank.
• Level-dependent "Levelcontrol" make-up.
– In a facility system with pressure maintaining station.
6.4.1 Pressure-dependent "Magcontrol" make-up mode
Example representation of a multi-tank system with hydraulic switching point
and a "MAG" diaphragm-type expansion vessel.
1 "MAG" expansion vessel
2 Servitec
3
Optional equipment and accessories see chapter 4.6 "Optional
equipment and accessories" on page 6
4 "WC" make-up line
The "Magcontrol" operating mode is set in the Customer menu of the Servitec
controller. This operating mode is used for plant systems with a diaphragm-type
expansion vessel. The make-up action depends on the pressure. The required
"PIS" pressure sensor is integrated in the Servitec. The "DC" degassing lines are
connected close to the diaphragm-type expansion vessel. In this way precise
pressure monitoring is enable for demand-matched make-up as.
Note!
Connect the degassing lines on the return side of the system upstream
of the hydraulic switching point. In this manner the permissible
temperature range of 0° - 90°C is adhered to.
6.4.2 Level dependent "Levelcontrol" make-up mode
Typical representation of Servitec 35 - 95 with motorized ball valves in a facility
system.
1 "PIS" pressure transducer
2 "DC" degassing line (degassed water)
3 "DC" degassing line (gas-rich water)
4 Optional equipment and accessories see chapter 4.6 "Optional
equipment and accessories" on page 6
5 "WC" make-up line
6 Servitec
7 "LIS" pressure pick-up
8 Pressure-maintaining station (compressor-controlled) with expansion
vessel
The "Levelcontrol" operating mode is set in the Customer menu of the device
controller. This operating mode is used for facility systems with pressure-
maintaining stations. The make-up with water depends on the filling level in the
expansion vessel of the pressure-maintaining station. The "LIS" pressure
transducer determines the filling level and sends this value to the controller of
the pressure maintenance station. The controller sends a 230 V signal to the
device controller when the filling level in the expansion vessel has fallen below
the set value.
Make-up with water is realised by regulating the motorized ball valve in the
"WC" make-up line. The device controller regulates the motor actuator of the
motorized ball valves. This ensures a controlled make-up with water and
monitoring of the make-up time and cycles.
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