Carrying Out Manual Draining; Taking The Unit Out Of Operation - Nordmann AT4 Operating Instructions Manual

4.3

Carrying out manual draining

Manual Drain
Press START or STOP
Cyl.A Cyl.BCyl.B
Esc Start Start
4.4

Taking the unit out of operation

20
Proceed as follows to drain the unit manually:
1. Briefly press the drain key. The draining dialogue appears in the
display.
Note: With double units both cylinders can be drained separately in the
draining dialogue.
2. press the <Start> key. The heating voltage is interrupted and the drain
pump starts. the yellow LED flashes.
To stop the drain cycle briefly press the <Stop> key.
Note: by pressing the <Esc> key the display unit returns to the indication
level. A draining cycle in progress is interrupted automatically.
In order to take the steam humidifier out of operation, perform the following
steps:
1. If the unit has to be switched off because of a malfunction, please note
the error code of the actual error message shown in the display.
2. Close the shut­off valve in the water supply line.
3. Start manual draining (see chapter 4.3) and wait until the steam cylinder(s)
is/are empty.
Note: If the drain pump is defective, the steam cylinder(s) is/are to be
emptied manually via the manual draining hose.
4. Actuate the unit switch.
5. Disconnect steam humidifier from the mains: Switch off all service
switches to mains supplies (heating and control voltage) and secure
switches in "off" position against accidentally being switched on, or
clearly mark the switches.
6. if ambient temperatures ≤ 0°C must be expected when the unit is out
of operation (operation of the nordmann at4 in a protective housing
outside the building): drain the water supply pipe and the water filter
(filter valve).
WARNING!
If steam was produced just before the unit is taken out of operation, wait
before opening the unit and let the steam cylinder cool down to prevent
danger of burning.
Danger of burning!