Nordmann Engineering Omega Pro User manual

OPERATION MANUAL
Steam humidier
Nordmann Omega Pro
2588792-A EN 1807

Thank you for choosing Nordmann
Installation date (MM/DD/YYYY):
Commissioning date (MM/DD/YYYY):
Site:
Model:
Serial number:
Proprietary Notice
This document and the information disclosed herein are proprietary data of Nordmann Engineering AG. Neither
this document, nor the information contained herein shall be reproduced, used, or disclosed to others without the
written authorisation of Nordmann Engineering AG, except to the extent required for installation or maintenance
of recipient's equipment.
Liability Notice
Nordmann Engineering AG does not accept any liability due to incorrect installation or operation of the equipment
or due to the use of parts/components/equipment that are not authorised by Nordmann Engineering AG.
Copyright Notice
© Nordmann Engineering AG, All rights reserved.
Technical modications reserved.

3Contents
Contents
1 Introduction 5
1.1 To the very beginning 5
1.2 Notes on the operation manual 5
2 For your safety 7
3 Product Overview 9
3.1 Construction Nordmann Omega Pro steam humidier 9
3.2 Functional description 10
3.3 System overview Nordmann Omega Pro for duct humidication 11
3.4 System overview Nordmann Omega Pro for direct room humidication 12
4 Operation 13
4.1 First-time commissioning 13
4.2 Display and operating elements 13
4.3 Commissioning after an interruption of operation 14
4.4 Notes on operation 15
4.4.1 Inspections during operation 15
4.4.2 Remote operating and fault indication (option) 15
4.4.3 Draining of the steam cylinder 16
4.5 Taking the unit out of operation 17
5 Operating the control software 18
5.1 Standard operating display 18
5.1.1 Operating status indication 19
5.1.2 Maintenance and malfunction indications 19
5.2 Navigating/Operating the control software 20
5.3 Information functions 21
5.3.1 Accessing support informations 21
5.3.2 Accessing system informations 21
5.4 Conguration 25
5.4.1 Accessing the "Conguration" submenu 25
5.4.2 Activating/deactivating and conguration of options – "Features" submenu 25
5.4.3 Humidity control Settings – "Control Settings" submenu 33
5.4.4 Basic settings – "General" submenu 37
5.4.5 Communication settings – "Communication" submenu 38
5.5 Maintenance functions 43
5.5.1 Accessing the "Service" submenu 43
5.5.2 Performing maintenance functions – "Service" submenu 43
5.6 Administration settings 47
5.6.1 Accessing "Administrator" submenu 47
5.6.2 Switching on/off password protection and software updates function -
submenu "Administrator" 47

4Contents
6 Maintenance 49
6.1 Important notes on maintenance 49
6.2 Maintenance intervals 50
6.3 Maintenance list 51
6.4 Removing and installing components for maintenance 52
6.4.1 Preparing the Nordmann Omega Pro for the removal of components 52
6.4.2 Removal and installation of the scale collector tank 53
6.4.3 Removal and installation of the steam cylinder 55
6.4.4 Removal and installation of the drain cup 58
6.4.5 Removal and installation of the lling cup, the level unit and the water hoses 59
6.4.6 Removal and installation of the drain pump 60
6.4.7 Removal and installation of the inlet valve 61
6.4.8 Removal and installation of the steam cylinder receptacle 62
6.5 Notes on cleaning the unit components 63
6.6 Notes on cleaning agents 65
6.7 Resetting the maintenance counter 66
6.8 Performing software and rmware updates 67
7 Fault elimination 68
7.1 Important notes on fault elimination 68
7.2 Fault indication 69
7.3 Malfunction list 70
7.4 Saving fault and service histories to a USB memory stick 74
7.5 Resetting the fault indication 74
7.6 Replacing the fuses and backup battery in the control unit 75
8 Taking out of service/Disposal 76
8.1 Taking out of service 76
8.2 Disposal/Recycling 76
9 Productspecication 77
9.1 Performance data 77
9.2 Operating data 78
9.3 Connections/Dimensions/Weights 78
9.4 Certicates 78

5Introduction
1.1 To the very beginning
We thank you for having purchased the NordmannOmegaProsteamhumidier.
The Nordmann Omega Pro steam humidier incorporates the latest technical ad van ces and meets all
recognized safety standards. Nevertheless, improper use of the Nordmann Omega Pro steam humidier
may result in danger to the user or third parties and/or damage to property.
To ensure a safe, proper, and economical operation of the Nordmann Omega Pro steam humidier, please
observe and comply with all information and safety instructions contained in the present documentation
as well as in the separate documentations of the components installed in the humidication system.
If you have questions after reading this documentation, please contact your Nordmann representative.
They will be glad to assist you.
1.2 Notes on the operation manual
Limitation
ThesubjectofthisoperationmanualistheNordmannOmegaProsteamhumidierinitsdiffer-
ent versions. The various options and accessories are only described insofar as this is necessary for
proper operation of the equipment. Further information on options and accessories can be obtained in
the respective instructions.
This operation manual is restricted to the commissioning, operation,maintenance and troubleshoot-
ing of the Nordmann Omega Pro steam humidier and is meant for well trained personnel being
sufcientlyqualiedfortheirrespectivework.
This operation manual is supplemented by various separate items of documentation (installation manual,
spare parts list, etc.), which are included in the delivery as well. Where necessary, appropriate cross-
references are made to these publications in the operation manual.
1 Introduction

6Introduction
Symbols used in this manual
CAUTION!
The catchword "CAUTION" used in conjunction with the caution symbol in the circle designates notes
in this operation manual that, if neglected, may cause damage and/or malfunction of the unit or
damage to property.
WARNING!
The catchword "WARNING" used in conjunction with the general caution symbol designates safety
and danger notes in this operation manual that, if neglected, may cause injury to persons.
DANGER!
The catchword "DANGER" used in conjunction with the general caution symbol designates safety and
danger notes in this operation manual that, if neglected, may lead to severe injury or even death
of persons.
Safekeeping
Please safeguard this operation manual in a safe place, where it can be immediately accessed. If the
equipment changes hands, the documentation must be passed on to the new operator.
If the documentation gets misplaced, please contact your Nordmann representative.
Language versions
This operation manual is available in other languages. Please contact your Nordmann representative
for information.

7For your safety
General
Every person working with the Nordmann Omega Pro must have read and understood the Nordmann
Omega Pro operation manual before carrying out any work.
Knowing and understanding the contents of the operation manual is a basic requirement for protecting
personnel against any kind of danger, to prevent faulty operation, and to operate the Nordmann Omega
Pro safely and correctly.
All icons, signs and markings applied to the components of the Nordmann Omega Pro must be observed
and kept in readable state.
Qualicationofpersonnel
All work described in this operation manual may only be carried out by specialists who are well
trainedandadequatelyqualiedandareauthorizedbythecustomer.
For safety and warranty reasons any action beyond the scope of this manual must be carried out only
by qualied personnel authorised by Nordmann.
It is assumed that all persons working with the Nordmann Omega Pro are familiar and comply with the
appropriate regulations on work safety and the prevention of accidents.
The Nordmann Omega Pro steam humidier may not be used by persons (including children) with
reduced physical, sensory or mental abilities or persons with lacking experience and/or knowledge, un-
less they are supervised by a person responsible for their safety or they received instructions on how
to operate the system.
Children must be supervised to make sure that they do not play with the Nordmann Omega Pro steam
humidier.
Intended use
The Nordmann Omega Pro steam humidier is intended exclusively for airhumidicationviaasteam
distributororablowerpackapprovedbyNordmannwithinthespeciedoperatingconditions.
Any other type of application, without the written consent of Nordmann, is considered as not conforming
with the intended purpose and may lead to the Nordmann Omega Pro becoming dangerous and will
void any warranty.
Operation of the equipment in the intended manner requires that all the information contained in this
operation manual are observed (in particular the safety instructions).
2 For your safety

8For your safety
DangerthatmayarisefromtheNordmannOmegaProsteamhumidier
DANGER!
Dangerofelectrichazard!
The Nordmann Omega Pro is mains powered. Live parts may be exposed when the unit is open.
Touching live parts may cause severe injury or danger to life.
Prevention: Before carrying out any work set the Nordmann Omega Pro out of operation as described
in chapter 4.5 (switch off the unit, disconnect it from the mains and stop the water supply) and secure
the unit against inadvertent power-up.
WARNING!
Hot water vapour - Danger of scalding!
The Nordmann Omega Pro produces hot water vapour. There is danger of scalding when com-
ing in contact with hot water vapour.
Prevention: Do not carry out any work on the steam system during operation (steam lines, steam
distributor, blower pack, etc.). If the steam system is leaky set the Nordmann Omega Pro immediately
out of operation as described in chapter 4.5. Correctly seal the steam system before putting the unit
into operation again.
WARNING!
Danger of burning!
During operation the components of the steam system (steam cylinder, steam distributor, etc.)
get very hot (up to 100 °C). There is danger of burning when touching the hot components.
Prevention: Before carrying out any work on the steam system set the Nordmann Omega Pro out of
operation as described in chapter 4.5, then wait until the components have cooled down sufciently
thus preventing danger of burning.
Preventing unsafe operation
If it is suspected that safe operation is no longer possible, the Nordmann Omega Pro should imme-
diately be shut down and secured against accidental power-up according to chapter 4.5. This can
be the case under the following circumstances:
– if the Nordmann Omega Pro is damaged
– if the electrical installations are damaged
– if the Nordmann Omega Pro is no longer operating correctly
– if connections and/or piping are not sealed
All persons working with the Nordmann Omega Pro must report any alterations to the unit that may af-
fect safety to the owner without delay.
Prohibitedmodicationstotheunit
No modications must be undertaken on the Nordmann Omega Pro without the express written
consent of Nordmann.
For the replacement of defective components use exclusively original accessories and spare parts
available from your Nordmann representative.

9Product Overview
3 Product Overview
1Scale collector tank drain valve
2Scale collector tank
3Coupling sleeve
4 Water supply connector (G 3/4")
5Inlet valve
6 Drain pump
7Water supply hose
8Water lling and drain hose
9Level hose
10 Level unit
11 Pressure equalizing pipe
12 Filling cup
13 Condensate connector (to cylinder)
14 Condensate connector (to drain)
15 Steam connector (ø45 mm)
16 Steam outlet hose
17 Heating cable plug
18 Heating elements
19 Excess temperature switch
20 Steam cylinder
21 Drain hose
22 Drain cup with drain connector (ø30 mm)
23 Unit switch
24 Control board with display and control unit
25 Cable feed throughs
26 Rating plate
27 Driver board
28 Terminals heating volateg supply
29 Ground terminals
30 Main contactor
31 Heating contactors
32 Power board
Fig. 1: Construction Nordmann Omega Pro steam humidier (gure shows medium sized unit)
3.1 Construction Nordmann Omega Pro steam humidier
3
4
5
7
6
8
10
12
13
14
11
9
1
2
22
21
18
19
16
15
17
25
28
29
30
32
31
23
24
27
20
26

10 Product Overview
3.2 Functional description
The Nordmann Omega Pro steam humidier is an atmospheric steam generator. It operates on the
resistance heating principle and is designed for direct room air humidication (with blower pack) and
indirect humidication (with steam distributor) in venti lating and air-conditioning systems.
Water supply
The water is supplied via a lter valve (accessory "Z261") to the steam humidier. It reaches the steam
cylinder via the level controlled inlet valve and the open lling cup.
Note: the open lling cup is designed in such a way, that the supply water is separated from the unit
water. That means, that no unit water can ow back into the supply water line.
Level regulation
The water level in the steam cylinder is continuously monitored with the level unit. If the water level
reaches a preset level (due to the evaporation process) the level unit supplies a signal to the controller.
This opens the inlet valve and the steam cylinder is lled up. When the preset operating level is reached,
the level unit supplies another signal to the controller to close the inlet valve.
The pressure equalizing pipe between the steam connection and the level unit ensures that the water
levels are the same in the steam cylinder and the level unit.
Steam generation regulation
The steam is produced in the steam cylinder by several resistance heating elements. An external or the
integrated continuous controller control the steam production fully variably from 0 to 100 %.
Alternatively the Nordmann Omega Pro can be controlled also via an On/Off controller.
Flushing
The evaporation process increases the concentration of minerals in the water of the steam cylinder. A
suitable volume of water must be ushed out of the steam cylinder from time to time and replaced by
fresh water to ensure that this concentration does not exceed a specic value unsuitable for operation.
The Nordmann Omega Pro consists of the following two forms of ushing:
– Automaticushingtakes place as soon as the water in the steam cylinder exceeds the upper
operating level (e.g. by foaming of the water).
– Flushing dependent on time performs the ushing process at preselected time intervals.
Automatic or time-dependent ushing takes place depending on the water quality and the operating data.
If the lowest operating level is reached during the ushing process, the inlet valve remains open until
the water level in the steam cylinder has reached the normal working level again. If the lowest operating
level is not reached, the inlet valve is closed.
Scale collector tank
The minerals precipitated by the evaporation process sink down in the steam cylinder and accumulate
in the scale collector tank, thus extending the service intervals and reducing the maintenance work.
Units designed for operation with water from a RO system or with de-ionized water do not require a scale
collector tank as RO water and de-ionized water contains only small amounts of minerals.

11Product Overview
3.3 System overview Nordmann Omega Pro for duct humidication
1Steam humidier
2Steam outlet connector
3Water drain connector
4 Water supply connector
5Water supply line
6 Manometer (recommended)
7Filter valve (accessory Z261)
8Open funnel with water trap
9Drain hose (supplied)
10 Electrical isolator control voltage supply
11 Electrical isolator heating voltage supply
12 Steam line (accessory DS80)
13 Condensate line (accessory KS10)
14 Air proving switch
15 Steam distributor (accessory DV81)
16 Humidity controller or humidity sensor
17 Humidity controller or humidity sensor
18 High limit humidistat
Fig. 2: System overview Nordmann Omega Pro for duct humidication
11
10
14
16
17
18
15
9
8
1
2
3
4
7
5
6
KS10
DS80
DV81
12
13
Z261
Return Duct
Supply duct
* by others
*
*
*
*
*
*
*
*
*
*

12 Product Overview
3.4 System overview Nordmann Omega Pro for direct room humidication
1Steam humidier
2Steam outlet connector
3Water drain connector
4 Water supply connector
5Water supply line
6 Manometer (recommended)
7Filter valve (accessory Z261)
8Open funnel with water trap
9Drain hose (supplied)
10 Electrical isolator control voltage supply
11 Electrical isolator heating voltage supply
12 Steam line (accessory DS80)
13 Condensate line (accessory KS10)
14 Blower Pack (accessory BP)
15 Humidity controller or humidity sensor
16 High limit humidistat
Fig. 3: System overview Nordmann Omega Pro for direct room humidication
3
4
7
5
6
FAN4
11
10
1
15
16
12
14
13
KS10
DS80
9
8
Z261
2
* by others
*
*
*
*
*
*
*
*

13Operation
The Nordmann Omega Pro steam humidier may be commissioned and operated only by persons familiar
with the Nordmann Omega Pro steam humidier and adequately qualied. It is the owner’s responsibility
to verify proper qualication of the personnel.
4.1 First-time commissioning
The rst-time commissioning must always be done by a service technician of your Nordmann repre-
sentative or a well trained and authorised person of the customer. Therefore the current manual does
not provide detailed information on this procedure.
The following steps are carried out upon rst-time commissioning in the specied order:
• Inspecting the steam humidier for correct installation.
• Inspecting the electrical installation
• Inspecting the water installation
• Inspecting the steam installation
• Flushing the water supply line.
• Conguring the control or the Nordmann Omega Pro, respectively.
• Carrying out test runs including checking of the control and monitoring devices.
• Filling in the commissioning protocol.
4.2 Display and operating elements
Fig. 4: Display and operating elements
DANGER!
Risk of electric shock!
After switching off the unit switch, there is still live voltage inside the control compartment of the Nor-
dmann Omega Pro.Therefore,beforeopeningtheunitthesteamhumidiermustbealways
separated from the mains supplies (heating and control voltage) via the electrical isolators.
1 External electrical isolators for heating and control volt-
age supply (not includ ed in the delivery, must be install-
ed in the mains supply lines)
2 Touchscreen
3 Status LED
– green: Nordmann Omega Pro is humidifying
– green pulsing: Nordmann Omega Pro is in standby
operation
– orange: Warning present or maintenance due
– red: Fault present
4 Unit switch
Humidier Humidier
4 Operation

14 Operation
4.3 Commissioning after an interruption of operation
The following description outlines the start up procedure after an interruption of operation (e.g. after
servicing the steam humidier). It is assumed that rst-time commissioning has been carried out prop-
erly by the service technician of your Nordmann representative and the Nordmann has been congured
accordingly.
1. When putting the steam humidier into operation the rst time or when putting the steam humidier
into operation after work has been carried out on the steam system, the operating personnel must
check whether the steam pipe is open over the entire length. To do this proceed as follows:
• Remove the front door on the steam cylinder side of the Nordmann Omega Pro.
• Undo the upper hose clamp of the steam hose in the unit with a screwdriver and pull the hose
down to remove it from the steam connection.
• Start up the ventilation system and check whether the pressure on the open steam connector
corresponds to the pressure in the ventilation system.
DANGER!
A steam line that is reduced in cross section or completely closed will cause an excessive
increase in pressure in the steam cylinder when the unit is operating and could lead to the
risk of scalding accidents!
Therefore: If no draught or only a slight one can be detected the steam line must be checked for
blockages and reductions in cross section before continuing with commissioning and you must
ensure that the steam line is open across the entire length and through the whole cross section.
2. Examine the steam humidier and installation for possible damage.
DANGER!
A damaged unit or systems with damaged installations may present danger to human life
or cause severe damage to material assets.
Therefore: Damaged systems and/or systems with damaged or faulty installations must not be
operated.
3. Mount front doors of the unit and lock it (if applicable).
4. Open the lter valve / shut-off valve in the water supply line.
5. Switch on the electrical isolators in the mains supplies (heating and control voltage).
6. Switch on the unit switch of the steam humidier.
The steam humidier carries out an automatic system test (initialising). If a fault is detected during
the system test, a corresponding fault message is shown in the maintenance and malfunction indi-
cation eld (see chapter 5.1.2).
Iftheinitializationissuccessful, the steam cylinder lls up and a function check on the level unit
is carried out. If a fault is detected during the function check on the level unit, a corresponding fault
message is shown in the maintenance and malfunction indication eld (see chapter 5.1.2).
If the function check on the level unit is successful, the Nordmann Omega Pro will be in normal
operating mode and the standard operating display is shown. The heating current switches on
as soon as the humidity controller/humidistat demands humidity. The LED lights green and steam
is produced after a short delay.

15Operation
4.4 Notes on operation
4.4.1 Inspections during operation
During operation the Nordmann Omega Pro and the humidication system have to be inspected weekly.
On this occasion check the following:
• the water and steam installation for any leakage.
• the steam humidier and the other system components for correct xing and any damage.
• the electric installation for any damage.
If the inspection reveals any irregularities (e.g. leakages, error indication) or any damaged components
take the Nordmann Omega Pro out of operation as described in chapter 4.5. Then, contact your Nord-
mann representative.
4.4.2 Remote operating and fault indication (option)
Via the relays on the optional operating and fault indication board the following operating status are
indicated:
Activated
remote indication relay
When?
"Error" An error is present, operation is stopped.
"Service" The control software has detected that the small or the large main-
tenance is due. The unit must be serviced according to the mainte-
nance section in this manual (see chapter 6).
"Steam" Demand present/humidication
"Unit on" The humidication system is switched on and under voltage

16 Operation
4.4.3 Draining of the steam cylinder
To perform a draining of the steam cylinder proceed as follows:
1. Press on the <Drain> button in the standard operating display. The "Manual" submenu appears.
2. In the "Manual" submenu press on the button of the cylinder(s) to be drained (<Cylinder A>, <Cyl-
inder B> or <Cylinder A/B>).
Note: on single units <Cylinder A> button is shown only.
3. Press on the <Yes> button to start the draining of the steam cylinder(s). A possible running hu-
midication process is interrupted, then the drain pump starts and empties the steam cylinder. The
progress bar in the display shows the current status of the drain cycle. After draining has nished
the unit returns to the "Manual" submenu.
Note: in order to stop the drain cycle press the <Cancel> button in the draining progress window.
The drain cycle is stopped and the unit returns to the "Manual" submenu.
4. If you have to carry out work on the Nordmann Omega Pro, switch off steam humidier via the unit
switch. Otherwise the steam cylinder is immediately lled again.

17Operation
4.5 Taking the unit out of operation
In order to take the Nordmann Omega Pro steam humidier out of operation (e.g. for maintenance pur-
pose), perform the following steps:
1. Close the shut-off valve in the water supply line.
2. If you have to carry out maintenance work on the steam cylinder and/or on the scale collector tank
perform a cylinder draining (see chapter 4.4.3).
Note: On units equipped with the optional drain valve for the scale collector tank, the scale collector
tank is drained simultaneously when performing a draining of the steam cylinder.
3. Switch off unit switch of the steam humidier.
4. Disconnect steamhumidierfrom themains: Switch off both electrical isolators in the mains
supply lines (heating and control voltage) and secure switches in "Off" position against accidentally
being switched on, or clearly mark the switches.
5. If you have to carry out maintenance work on the steam cylinder, empty the scale collector tank via
the drain valve.
WARNING!
Danger of burning!
The temperature of the water in the scale collector tank can be up to 95 °C.
Therefore: wear isolating gloves and open the drain valve carefully.
If no water ows out from the open drain valve, the drain inside the scale collector tank is clogged and
the scale collector tank may not be emptied. If this is the case, wait until the temperature indication
adhesive on the scale collector tank indicates a temperature below "<50°C" before dismantling the
tank (since the scale collector tank is lled with water).

18 Operating the control software
5.1 Standard operating display
After switching on the Nordmann Omega Pro and the automatic system test the steam humidier is in
normal operating mode and the standard operating display is shown.
Note: the appearance of the standard operating display depends on the current operating status and
the conguration of the humidity control of the system and can deviate from the display shown below.
The standard operating display is structured as follows:
Fig. 5: Standard operating display
Cylinder selection (shown only on double units)
Maintenance/malfunctions indication eld
(see chapter 5.1.2)
Humidity control information
Operating status eld
(see chapter 5.1.1)
Access Help screen
Cylinder Draining
Access system informations
Access main menu
5 Operating the control software

19Operating the control software
5.1.1 Operating status indication
The following operation status indications may appear during operation:
Operating status indications Description
The control is initialising.
The Nordmann Omega Pro is in standby mode (no demand present).
The Nordmann Omega Pro performs a cylinder ushing.
The Nordmann Omega Pro is producing steam (humidifying).
The Nordmann Omega Pro checks the function of the level unit.
The Nordmann Omega Pro is connected to a BMS, and the BMS has activated the diagnostic
mode.
The Nordmann Omega Pro has been stopped via an external enable contact (remote enable/
disable).
The Nordmann Omega Pro is in standby mode and the keep warm function is activated.
The Nordmann Omega Pro is stopped due to a malfunction which prevents further operation.
Additionally "Warning" or "Fault" is displayed in the maintenance and malfunction eld.
5.1.2 Maintenance and malfunction indications
The following maintenance and malfunction indications may appear during operation:
Maintenance and
malfunction indications
Description
No malfunction present. By pressing on the indication eld the service menu can be accessed.
This message appears if the maintenance counter for the large maintenance has elapsed. If the
large maintenance is not carried out, and the maintenance counter is not reset within 7 days,
a corresponding fault message appears.
Carry out the large maintenance, then reset the maintenance counter in the "Service" submenu.
This message appears if the maintenance counter for the small maintenance has elapsed. If the
small maintenance is not carried out, and the maintenance counter is not reset within 7 days,
a corresponding fault message appears.
Carry out the small maintenance, then reset the maintenance counter in the "Service" submenu.
A malfunction with status "Warning" is active. Additionally the status LED lights yellow. Depend-
ing on the malfunction the Nordmann Omega Pro is either be stopped or stays operable for a
certain period of time.
The Nordmann Omega Pro was stopped due to a malfunction, which prevents further operation.
Additionally the status LED lights red.

20 Operating the control software
5.2 Navigating/Operating the control software
Navigation element Action
Accessing main menu
Accessing system informations
Performing manual steam cylinder draining
Accessing help screen
If you press on a eld with a blue arrow symbol a new screen with additional
informations or settings appears.
This symbol on the left side of the operating status eld and of the mainte-
nance/malfunctions indication eld indicates, that the system is working ok.
This symbol on the left side of the maintenance/malfunctions indication
eld indicates, that a Warning is present. Press on the eld to get further
information.
This symbol on the left side of the operating status eld and of the main-
tenance/malfunctions indication eld indicates, that a Fault is present (ad-
ditionally the LED lights red). Press on the eld to get further information.
Jumps back to previous screen (Cancel and back)
Scroll up/down in the present window
Increase/decrease value
Delete shown value
Conrm set value or selected option