Nameplate; Function - Reflex Servitec 35 Originalbetriebsanleitung

Description of the device
1 Degassing valve "DV"
2 Vacuum gauge "PI"
3 Control Touch controller
4 2-way motor control valve "CD" upstream of vacuum spray tube
5 2-way motor control valve "WV" upstream of vacuum spray tube
6 Ball control ball valve "PV" downstream of pump "PU"
7 Connection "WC" for the make-up
• Input for gas-rich water from the make-up
8 Connection "DC" for degassing
• Input for gas-rich water from the facility system
9 Connection "DC" for degassing
• Degassed water outlet
10 Pressure switch "PIS"
11 Pump "PU"
12 Insufficient water switch
13 Feed and drain cock "FD"
14 Main switch
15 Vacuum spray tube "VT"
4.2.1

Nameplate

The nameplate is attached below the screw cover of the controller. On it can be
found information about the manufacturer, the year of manufacture, the
manufacturing number and the technical data.
Information on the type plate
Type
Serial No.
min. / max. allowable pressure P
max. continuous operating temperature
min. / max. allowable temperature / flow
temperature TS
Year built
min. operating pressure set up on shop floor Factory set minimum operating
at site
max. pressure saftey valve factory - aline
at site
4.3

Function

The Servitec is suited for the degassing of water from the plant and make-up
water. It removes up to 90 % of the dissolved gases from the water. The
degassing operation uses timer-controlled cycles. A cycle comprises the
following phases:
• Inject and pump down to create a vacuum
The feed "DC" of gas-rich water from the system to the vacuum spray tube
"VT" has been opened. Depending on the requirement, partial flows of the
gas-rich system water and the make-up water are atomised in the vacuum
spray tube via the lines "DC" and "WC". As less water is injected into the
spray tube than is fed back into the system from the vacuum spray tube via
the pump "PU", a vacuum is formed in the spray tube. The pump "PU"
continues pumping down to create a vacuum until the water saturation
pressure is reached. The vacuum is indicated at the vacuum gauge "PI". The
large contact surface of the atomised water and the gas saturation
gradient to the vacuum result in degassing of the water. The pump returns
degassed water from the vacuum spray tube to the system where it again
begins to dissolve gases. There it is able to dissolve gases again.
28 — English
Meaning
Device name
Serial number
Minimum/maximum permissible
pressure
Maximum temperature for
continuous operation
Minimum / maximum permissible
temperature / TS flow
temperature
Year of manufacture
pressure
Set minimum operating pressure
Factory set actuating pressure of
the safety valve
Set actuating pressure of the
safety valve
Vacuum spray degassing — 18.12.2019-Rev. A
• Discharge
The "PU" pump shuts off. The system continues to inject and degas water
in the "VT" vacuum spray tube. The water level in the vacuum spray tube
rises. The gases separated from the water are discharged via the "DV"
degassing valve.
• Idling time
The gas has been discharged, the Servitec will remain idling until the next
cycle is started.
Sequence of a degassing cycle in the vacuum spray pipe "VT"
Example: Cooling water system ≤ 30 °C, System pressure 1.8 bar, "DC" system
degassing in operation, "WC" make-up degassing closed.
1 Inject and pump down to create
a vacuum
Inject and pump down to create
2
a vacuum
Degassing
The entire degassing process is hydraulically synchronised by the "PV" motor
adjustment apparatus and the Servitec controller. The system monitors the
operating states and displays them at the Servitec controller. The controller
provides 3 different degassing programmes and 2 different make-up variants for
selection and setting.
Degassing programmes
The device controller regulates the degassing process. The controller monitors
the operating states and outputs them to the display.
The controller provides 3 different degassing programmes for selection and
adjustment:
• Continuous degassing
For continued degassing over several hours or days in a sequence of
degassing cycles without idling periods. This degassing programme must
be selected after commissioning and repairs.
• Interval degassing
This comprises a limited number of degassing cycles. There is an idling
time between the intervals. This degassing programme must be selected
for continuous operation.
• Make-up degassing
With this setting, the make-up water is degassed. A system degassing does
not occur.
Make-up variants
There are two make-up variants for the device. These are selected in the
controller and set for the device:
• Make-up variant Magcontrol.
For facility systems with expansion vessels. The pressure in the facility
system is monitored with the aid of the integrated pressure sensor in the
device. If the plant pressure falls below the calculated filling pressure,
water make-up is triggered.
• Make-up variant Levelcontrol.
For facility systems with pressure maintaining stations. The water level in
the expansion vessel of the pressure maintaining system is determined
with the "LIS" external pressure transducer. If the water level in the
expansion vessel falls, a signal is switched from the pressure maintenance
station to the Servitec to activate the make-up.
3 Discharge
4 Idling time