Operation
16
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English
Servimat M/L — 28.01.2021
8
Operation
8.1
Operating modes
8.1.1
Automatic mode
i
After successful initial commissioning, start automatic operation of the device.
The controller monitors the following functions:
•
Maintain pressure
•
Compensate expansion volume
•
Degas
•
Automatic make-up
To start the Automatic mode, proceed as follows:
1.
Press "AUTO“.
–
The pumps and pressure relief valves are regulated so that the
pressure remains constant to within ± 0.2 bar.
–
Faults are displayed and evaluated.
Automatic mode is activated.
Select a degassing programme for Automatic mode. The Customer menu
provides two different degassing programmes for selection, see chapter 9.3.4
"Degassing programmes
•
Continuous degassing.
•
Interval degassing.
For selection of degassing programmes, see chapter 9.3.5 "Setting degassing
programmes" on page 20 .
The controller displays the selected degassing programme in the message line.
8.1.2
Manual mode
The manual mode is intended for test and maintenance tasks.
Manual mode allows you to select the following functions and to perform a test
run:
•
"PU" pump.
•
The pressure relief valve (opening of RKH1 and MKH2).
•
The “WV” Safe Control for the make
-up.
•
The 3-
way motorized ball valve “MKH3”
You have the option to simultaneously switch multiple functions and to test
them in parallel. Switch the function on and off by touching the corresponding
button.
•
The button is highlighted green: The function is switched off.
•
Press the desired button.
•
The button is highlighted blue: The function is switched on.
Proceed as follows:
1.
Press "Manual mode“.
2.
Select the desired function:
•
“PU” = Pump
•
“RKH1+MKH2” = Pressure relief valve
•
“WV1” = Safe Control make
-up valve
•
“MKH3” = Opening/closing of tank/spray pipe to the system
The change in the filling level and the tank pressure are indicated on the display.
Note!
Manual operation can not be performed if safety-relevant parameters
are exceeded.
–
Switching is blocked if safety-relevant settings are exceeded.
8.1.3
Stop mode
Except for the display of information, the device is non-functional in Stop mode.
Function monitoring is stopped.
The following functions are deactivated:
•
The pump is switched off.
•
The 2-way motorized ball valve in the pressure relief pipe is closed.
•
The 2-way motorized ball valve to the tank is closed.
•
The 3-way motorized ball valve in the degassing line is closed to the spray
pipe.
To start Stop mode operation, proceed as follows:
•
Touch "STOP".
Note!
The system returns an alarm if the Stop mode is activated for more than
4 hours.
–
If "Volt free contact?" in the Customer menu is set to "Yes", the
system outputs the alarm to the group alarm contact.
8.2
Restarting
CAUTION
Risk of injury due to pump start-up
Hand injuries may occur when the pump starts up if you turn the pump motor at
the impeller using a screwdriver.
•
Switch the pump to a zero-volts state before turning the pump at the fan
wheel with a screwdriver.
ATTENTION
Device damage due to pump start-up
Pump damage may occur when the pump starts up if you turn the pump motor
at the impeller using a screwdriver.
•
Switch the pump to a zero-volts state before turning the pump at the fan
wheel with a screwdriver.
After an extended standstill time (the device is de-energised or in Stop mode),
the pumps may jam. For this reason, use a screwdriver to rotate the pumps at the
fan wheel of the pump motors before restarting.
Note!
A jamming of the pumps is prevented during operation thanks to forced
starting action (after 24 hours).
