Variomat Basic — 22.07.2020 - Rev.A
• For Automatic mode, you can set various degassing programmes in
the Customer menu, see chapter 8.6 "Parametrising the controller
in the Customer menu" on page 18 . The controller display supplies
the necessary information.
Continuous degassing
After commissioning and repairs to the connected system, select the
continuous degassing program.
The device will continuously degas for a set period of time. Free and
dissolved gases are quickly removed.
• Automatic start after execution of the start routine during
commissioning.
• Activated from the Customer menu.
• The degassing time can be set in the Customer menu, dependent
on the actual system.
– The default setting is 12 hours. After expiry of the set time,
the device automatically switches to interval degassing.
Interval degassing
For continuous operation, select the interval degassing program. As the
default it is set in the Customer menu.
Degassing is continuous during an interval. An idling time follows an
interval. The interval degassing mode can be limited to an adjustable
time period. Time settings can be made in the Service menu.
• Automatic activation upon expiry of continuous degassing.
• Degassing interval (default 90 s)
• Break time (default: 120 min)
• Start / end (8:00 a.m. - 6:00 p.m.)
9.2 Manual mode
Use:
For testing and maintenance tasks.
Start:
Press "Manual" on the controller. The Auto LED at the operator panel
flashes to visually indicate that Manual mode is active.
Functions:
Manual mode allows you to select the following functions and to
perform a test run:
• "PU" pump.
• "PV" motor ball valve in the "PV" overflow line.
• "WV" make-up solenoid valve.
You can switch several functions after each other and test them at the
same time.
30 % 2.5 bar
PU1!* PV1 WV1
• Use the "Switch up/down" keys to select the
function.
– "PU1" = Pump
– "PV1" = Solenoid valve in the overflow
line
– "WV1" = solenoid valve make-up
(* selected and active units are marked
with "!").
• Press "OK".
– Confirm the selection or shut-down of the individual
functions.
• "Quit" button
– Shut-down of the individual functions in reverse order.
– Press "Quit" for the last time and the system moves in Stop
mode.
• "Auto" button
– Return to Automatic mode.
Note!
Manual operations cannot be performed if safety-relevant
parameters would be exceeded. Switching is then disabled.
9.3 Stop mode
Use:
During maintenance work on the device.
Start:
Press "Stop" on the controller. The Auto LED at the operator panel
extinguishes.
Functions:
Except for the display of information, the device is non-functional in
Stop mode. Function monitoring is stopped.
The following functions are deactivated:
• The "PU" pump is switched off.
• The "PV" motor ball valve in the "PV" overflow line is closed.
• The solenoid valve in the "WV" make-up line is closed.
Note!
The system returns an alarm if the Stop mode is activated for
more than 4 hours.
If "Floating alarm contact?" in the Customer menu is set to
"Yes", the system outputs the alarm to the group alarm contact.
9.4 Summer operation
Use:
In summer
Start:
Switch off degassing via the customer menu.
Functions:
The degassing of the network water is not necessary if the circulating
pumps of the system are shut down during Summer because gas-rich
water cannot reach the device. Energy is saved.
After Summer, select the "Interval degassing" degassing programme in
the Customer menu or "Continuous degassing", if required.
For a detailed description of the selection of degassing programmes,
see chapter 9.1 "Automatic mode" on page 20 .
Note!
The pressurisation feature of the device must remain operative
in Summer.
– Automatic mode remains active.
9.5 Restarting
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.
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).
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