Xylem Lowara Servitec Degassing Unit OMI - Manual (Page 9)

9
Automatic Mode
Automatic Mode
successfully completed. If you are in automatic mode, you can select
from three degassing programs, if required. System monitoring is active
with all three programs. Make-up takes place automatically. Selection in
customer menu.
Continuous degassing – Intensive degassing following start-up and
repairs.
The degassing cycles are executed successively for the set
continuous degassing time (basic setting: 5 h). The controller then
automatically proceeds with interval degassing. In the case of water
systems, at least half the system volume should flow through the
’servitec’ unit once during start-up. Based on a system volume of
8 m
3 , this is equivalent to approx. 22 h of continuous degassing. In
systems that are particularly rich in gas, a continuous degassing
period of 48 h is completely sufficient. As a result of the subsequent
interval degassing, 10,000 intervals are made per year. This number
per year must not be exceeded in order to avoid unnecessary wear to
the ’servitec’. The controller registers the total number of intervals that
have passed.
Interval degassing – Economy mode in automatic mode
After 8 intervals (standard), a break (standard 23 h) is observed
before the next 8 degassing intervals are started. This program is
automatically started upon completion of continuous degassing or can
be selected manually for systems already degassed. Interval
degassing then starts at 08:00 each day.
No degassing – Only make-up
The system water is not degassed. This operating mode is practical
during summer operation or if general degassing of the system water
is not required.
Manual mode may only be be used after the initial start-up has been
completed. This operating mode is primarily a means of performing
functional checks of the pump and the make-up solenoid valve.
Select the pump or motorized ball valve,
activate the flashing symbol with the “ok”
button.
Pump starts/motorized ball valve opens.
Pressing the “ok” button again stops the
pump or closes the motorized ball valve.
Alternatively, the “quit” button can also be
pressed directly. The pump and motor-
ized ball valve then switch off after each
other.
Stop Mode
In stop mode, ’servitec 30’ is without function except for indication in the
LCD display. Operation monitoring does not take place. The pump is shut
off. The adjacent display appears when the “stop” button is pressed.