Nordmann Omega
Steam generator
INSTALLATION MANUAL
2590564 EN 1710
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 modications reserved.
Contents
1 Introduction 5
1.1 To the very beginning 5
1.2 Notes on the installation manual 5
2 For your safety 7
3 Product Overview 9
3.1 Models overview 9
3.2 Identicationoftheunit 10
3.3 Options 11
3.4 Accessories 11
4 Inspecting the delivery / Storage and Transportation 12
4.1 Delivery 12
4.1.1 Standard delivery 12
4.2 Inspectingthedelivery 12
4.3 Storage and Transportation 13
5 Notes for the planning engineer 14
5.1 Selectingtheunitversion 14
5.1.1 Determinationoftherequiredsteamcapacity 14
5.1.2 Selectingtheunit 14
5.2 Selectingtheoptionsanaccessories 14
6 Mounting and installation work 15
6.1 Safetynotesonmountingandinstallationwork 15
6.2 Installation overview 16
6.3 Mounting the unit 17
6.3.1 Notesonlocatingtheunit 17
6.3.2 Mounting the steam generator 19
6.3.3 Inspectingtheinstalledunit 21
6.4 Steam installation 22
6.4.1 Overview steam installation 22
6.4.2 Positioning/mounting the steam distributor 23
6.4.3 Installingthesteamandcondensatelines 24
6.4.4 Commonsteamandcondensatelineerrors 28
6.4.5 Inspectingthesteaminstallation 29
6.5 Waterinstallation 30
6.5.1 Overviewwaterinstallation 30
6.5.2 Notes on water installation 31
6.5.3 Inspectingthewaterinstallation 32
6.6 Electricinstallation 33
6.6.1 Notesonelectricalinstallation 33
6.6.2 Wiring diagram Nordmann Omega 34
3
6.6.3 Installationworkexternalconnections 35
6.6.3.1 Connectingthecontrolwiring 35
6.6.3.2 ConnectinganexternalOn/Offpushbutton 36
6.6.3.3 Connectingtheexternalsafetychain 36
6.6.3.4 Connectingtheinternal(option)orexternal(accessory)touchdisplay(s) 36
6.6.3.5 Connectingthevoltagesupply 37
6.6.4 Performancedata/Fuses"F3"voltagesupply 38
6.6.5 Inspectingtheelectricalinstallation 38
7 Appendix 39
7.1 Unit dimensions 39
7.1.1 Unitdimensionsunit"Small"(OmegaPro4...8) 39
7.1.2 Unitdimensionsunit"Medium"(Omega Pro 12...20) 40
4
1 Introduction
1.1 To the very beginning
We thank you for having purchased the Nordmann Omega steam generator.
The Nordmann Omega steam generator incorporates the latest technical ad van ces and meets all recognized safety standards. Nevertheless, improper use of the Nordmann Omega steam generator 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 steam generator, 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 humidication 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 installation manual
Limitation
The subject of this installation manual is the Nordmann Omega steam generator in its different
versions
operation of the equipment. Further information on options and accessories can be obtained in their
respective instructions.
This installation manual is restricted to the installation of the Nordmann Omega steam generator and
is meant for well trained specialists being sufciently qualied for their respective work.
This installation manual is supplemented by various separate items of documentation (operation manual,
spare parts list, etc.), which are included in the delivery as well. Where necessary, appropriate crossreferences are made to these publications in the installation manual.
. The various options and accessories are only described insofar as is necessary for proper
5
Symbols used in this manual
CAUTION!
The catchword "CAUTION" used in conjunction with the caution symbol in the circle designates notes
in this installation 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 installation 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 installation manual that, if neglected, may lead to severe injury or even death
of persons.
Safekeeping
Please safeguard this installation 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 installation manual is available in other languages. Please contact your Nordmann representative
for information.
6
2 For your safety
General
Every person, who is in charge of the installation work on the Nordmann Omega must have read and
understood this installation manual and the Nordmann Omega operation manual before carrying out
any work.
Knowing and understanding the contents of the installation manual and the operation manual is a basic
requirement for protecting personnel against any kind of danger, to prevent faulty operation, and to
operate the unit safely and correctly.
All icons, signs and markings applied to the Nordmann Omega must be observed and kept in readable
state.
Qualication of personnel
All installation work described in this installation manual may only be carried out by specialists who
are well trained and adequately qualied and are authorised by the customer.
For safety and warranty reasons any action beyond the scope of this manual must be carried out only
by qualied personnel authorised by Nordmann.
It is assumed that all persons working with the Nordmann Omega are familiar and comply with the appropriate regulations on work safety and the prevention of accidents.
Intended use
The Nordmann Omega steam generator is intended exclusively for generation of steam for a
steam bath or steam shower within the specied 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 becoming dangerous and will void any warranty.
Operation of the equipment in the intended manner requires that all the information contained in this
installation and operation manual are observed (in particular the safety instructions).
7
Danger that may arise from the Nordmann Omega
DANGER!
Danger of electric shock!
The Nordmann Omega 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: The Nordmann Omega must be connected to the mains only after all mounting and in-
stallation work has been completed, all installations have been checked for correct workmanship and
the unit is closed and properly locked.
Preventing unsafe operation
All persons working with the Nordmann Omega are obliged to report any alterations to the unit that
may affect safety to the owner without delay and to secure the Nordmann Omega against accidental
power-up.
Prohibited modications to the unit
No modications must be undertaken on the Nordmann Omega 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.
8
3 Product Overview
3.1 Models overview
Steam generators Nordmann Omega are available in two unit sizes with different heating voltages
and steam capacities ranging from 4 kg/h up to a maximum of 20 kg/h.
Model
Nordmann Omega
4 x 4 3.5 230 V/1~/50...60 Hz
8 x 8 6.5
12 x 12 9.5
16 x 16 12.5
20 x 20 15.5
Unit size Max. steam capacity
Small Medium
Key model designation
Product designation
Max. steam capacity in kg/h
in kg/h
PN max.
in kW
Heating voltage
400 V/3~/50...60 Hz
Example:
Nordmann Omega 8
9
3.2 Identication of the unit
The identication of the unit is found on the rating plate:
Type designation Serial number (7 digits) Month/Year
Heating voltage
Maximum steam capacity per unit
Admissible water supply pressure
Field with certication symbols
Power consumption
Nordmann Engineering AG, Talstrasse 35-37, 8808 Pfäfkon SZ, Switzerland
Type: Nordmann Omega 20 Ser.No: XXXXXXX 02.17
Heating voltage: 400V / 3~ / 50...60Hz Power: 15 kW
Steam capacity: 20.0 kg/h
Water pressure: 1...10 bar
Engineered in Switzerland, Made in Germany
10
Fig.1: Locationofthespecicationlabel
3.3 Options
Touch-Display internal 1x
3.4 Accessories
Filter valve 1x Z261
Filter cartridge 1x Filter cartridge
Mounting station 1x
Touch-Display external on-wall 1x
Touch-Display external in-wall 1x
Nordmann Omega
4 8 12 16 20
Nordmann Omega
4 8 12 16 20
1x Filter cartridge
Size S
Size L
11
4 Inspecting the delivery / Storage and Transportation
4.1 Delivery
4.1.1 Standard delivery
The standard delivery includes:
– Steam generator Nordmann Omega including xing set, installation manual (this document) and
operation manual (this document) and spare parts list, packaged in cardboard box.
Unit type Dimensions packaging (L x W x D) Transport weight
Nordmann Omega 4...8 555 mm x 465 mm x 250 mm 11.8 kg
Nordmann Omega 12..20 555 mm x 465 mm x 370 mm 15.8 kg
– Ordered options with operating instructions according chapter3.3, packed separately.
– Ordered accessories with operating instructions according chapter3.4, packed separately.
4.2 Inspecting the delivery
After receiving:
– Inspect shipping boxes for damage.
Any damages of the shipping boxes must be reported to the shipping company without delay.
– Check packing slip to ensure all parts has been delivered.
All material shortages are to be reported to your Nordmann supplier within 48 hours after receipt of
the goods. Nordmann Engineering AG assumes no responsibility for any material shortages beyond
this period.
– Unpack the parts/components and check for any damage.
If parts/components are damaged, notify the shipping company immediately.
– Check whether the components are suitable for installation on your site according to the unit data
stated on the rating plate.
12
4.3 Storage and Transportation
Storing
Until installation store the Nordmann Omega Pro in its original packaging in a protected area meeting
the following requirements:
– Room temperature: 5 ... 40 °C
– Room humidity: 10 ... 75 %rh
Transportation
For optimum protection always transport the unit and components in their original packaging and use
appropriate lifting/transporting devices.
WARNING!
It is the customer's responsibility to ensure that operators are trained in handling heavy goods and that
the operators comply with the appropriate regulations on work safety and the prevention of accidents.
Packaging
Keep the original packaging of the components for later use.
In case you wish to dispose of the packaging, observe the local regulations on waste disposal. Please
recycle packaging where possible.
13
5 Notes for the planning engineer
5.1 Selecting the unit version
To select the unit version the following planning steps are required:
1. Determining the required maximum steam capacity according chapter5.1.1.
2. Selecting the unit version from the table in chapter5.1.2.
5.1.1 Determination of the required steam capacity
The steam capacity required for a particular steam bath can be determined with the following table:
Cabin size Required steam capacity
Plastic cabin brick lined cabin
4 m³ 4 kg/h 8 kg/h
8 m³ 8 kg/h 12 kg/h
12 m³ 12 kg/h 16 kg/h
16 m³ 16 kg/h 20 kg/h
Important notes:
– The determined steam capacity based on the above table does not consider any steam loss (e.g.
due to condensation in the steam hoses and the steam distributors), any heat loss of the unit as
well as any absorption or release of humidity of materials located in the steam bath/steam shower
being humidi ed.
In addition, the calculated steam capacity does not consider any losses caused by the draining rate
depending on the water quality.
The total amount of losses depends on the entire system and must be taken into consideration when
determining the required steam capacity. If you have any questions regarding the calculation of the
steam capacity please contact your Nordmann representative.
5.1.2 Selecting the unit
Model
Nordmann Omega
4 x 4 230 V/1~/50...60 Hz
8 x 8
12 x 12
16 x 16
20 x 20
Unit Size Max. steam capacity
Small Medium
in kg/h
Heating voltage
400 V/3~/50...60 Hz
5.2 Selecting the options an accessories
For selecting the options and accessories see chapter3.3 and chapter3.4.
14
6 Mounting and installation work
6.1 Safety notes on mounting and installation work
Qualication of personnel
All mounting and installation work must be carried out only by well qualied specialists authorised by
the owner. It is the owner’s responsibility to verify proper qualication of the personnel.
General notes
Strictly observe and comply with all information given in the present installation manual regarding the
mounting of the unit and the installation of water, steam and electricity.
Observe and comply with all local regulations dealing with water, steam and electrical installations.
Safety
Some installation work requires removal of the unit covers. Please note the following:
DANGER!
Danger of electric shock!
The Nordmann Omega 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: The Nordmann Omega must be connected to the mains only after all mounting and in-
stallation work has been completed, all installations have been checked for correct workmanship and
the unit is closed and properly locked.
CAUTION!
The electronic components inside the steam generator are very sensitive to electrostatic discharge.
Prevention: To protect these components against damage caused by electrostatic discharge (ESD
protection) appropriate measures must be taken when the unit is open for installation work.
15
6.2 Installation overview
1.2 ... 1.3 m
min. 5 %
Rmin. 300 mm
DS60: 30 mm (Small) / DS80: 45 mm (Medium)
Internal diameter
–
ø 30 mm
G 3/4"
min. 20 %
Rmin. 300 mm
+
min. 500 mm
Steam installation
see chapter6.4
Mounting the unit
see chapter6.3
Water installation
see chapter6.5
Electric installation
see chapter6.6
Fig.2: Installation overview
G 1/2" / G 3/8"
1...10 bar
1...40 °C
ø14/7 mm
min. 30 cm
G 3/8"
G 3/8"
≥ 40 mm
Z261
16
6.3 Mounting the unit
6.3.1 Notes on locating the unit
min. 400 mm
min. 100 mm
Y
min. 100 mm
X
Z
min. 1000 mm
min. 280 mm
Fig.3: Distancestobeobserved
Nordmann Omega 5...8
(Small)
12...20
(Medium)
Housing dimensions in mm X 470 470
Y 150 270
Z 350 350
Net weight in kg 10.6 14.4
Operation weight in kg 12.9 19.6
17
The installation site of the Nordmann Omega depends largely on the location of the steam distributor. To
ensure proper functioning of the steam generator and to obtain an optimal efciency, the following
points must be considered and observed when choosing the location for the steam generator:
– Install the steam generator so that:
– the length of the steam line is kept as short as possible (max. 8 m),
– the minimum bend radius for steam hoses (R= 300 mm) and for solid steam pipes (5 x
internal diameter) and the minimum upslope and downslope (min. 20 %) of the steam lines
is maintained (see chapter6.4.3).
– The Nordmann Omega is designed for wall-mounting in protected interiors. Make sure that the con-
struction (wall, pillar, oor-mounted console, etc.) to which the steam generator is to be mounted,
offers a sufciently high load-bearing capacity (take notice of the weight information found in the
dimensions and weights table after Fig.3), and is suitable for the installation.
– The back panel of the Nordmann Omega retains heat during operation (max. surface temperature of
the metal housing approx. 60 - 70 °C). Make sure, therefore, that the construction (wall, pillar, etc.)
to which the unit is to be mounted, does not consist of heat-sensitive material.
– Install the Nordmann Omega in such a manner that it is freely accessible with sufcient space avail-
able for maintenance purposes. The minimum distances shown in Fig.3 must be maintained.
– The Nordmann Omega is protected according to IP20. Make sure the unit is installed in a drip-proof
location and the admissible ambient conditions are complied with.
– Do not mount the Nordmann Omega to hot or very cold walls or near vibrating components.
– The steam generator Nordmann Omega must only be installed in rooms with a oor drain.
CAUTION!
If for some reason the Nordmann Omega must be installed in a location without oor drain, it is
mandatory to provide a leakage monitoring device to safely interrupt the water supply in case of
leakage.
– Important: The ambient pressure at the place of installation of the Nordmann Omega and the steam
distributor must be equal.
– When mounting the Nordmann Omega use only the mounting materials supplied with the unit.
If mounting with the materials supplied is not possible in your particular case, select a method of
mounting that is of similar stability.
– The Nordmann Omega is designed for installation and operation within buildings (admissible tem-
perature range 5...40 °C). For outdoor operation the Nordmann Omega must be placed in a weather
protective housing. If ambient temperatures near or below the freezing point have to be expected,
the protective housing must equipped with a thermostat controlled heating of sufcient capacity. The
water supply pipe must be equipped with a trace-heating and must be insulated up to the protective
housing. The installation of a normally open valve inside the building envelope that will drain water
in case of power failure is highly recommended.
18
6.3.2 Mounting the steam generator
c
transport securing device
d
ab
A
Dimension Omega 5..8
"a" in mm 25.0 25.0
"b" in mm 225.0 225.0
"c" in mm 65.0 65.0
"d" in mm 308.0 348.0
"e" in mm 219.5 209.5
Weights Omega 5..8
Net weight in kg 10.6 14.4
Operating weight in kg 12.9 19.6
A
e
A
Omega 12..20
(Small)
(Small)
(Medium)
Omega 12..20
(Medium)
C
B
C
B
C
B
Fig.4: Mounting the steam generator
19
Procedure
1. Mark the attachment points "A" at the desired position with the help of a spirit level. Then, drill holes
diameter: 10 mm, depth: 50 mm.
2. Insert the supplied plastic plugs. Then, screw in the supplied screws 6 x 50 mm into the plastic plug
in such a way that the distance between screw head and unit rear wall is 10 mm.
3. Unlock the retaining screw of the unit cover, then remove the unit cover.
4. Remove transport securing device located on top of the steam tank , disconnect all heating cables
and the connecting cables to the over temperature switch(es). Then, pull steam tank out of the coupling sleeve and remove.
5. Carefully pull the xing clip of the lling cup out of the support, then push lling cup down and pull it
to the front out of the support.
6. Hang the steam generator onto the screws. Insert the supplied locking plates "B" between screw
head and unit rear wall. Align the steam generator horizontally using a spirit level, then fasten the
screws.
7. Moisten the O-ring in the steam tank receptacle with water (do not use grease or oil). Then, insert
the stirrup on the backside of the steam tank into the retaining bracket on the back wall of the unit
housing. Insert the connector on the bottom side of the steam tank into steam tank receptacle and
push steam tank downwards until it comes to a stop.
Important: Check whether the steam tank is correctly hooked in the retaining bracket on the back
wall of the unit housing by pulling the steam tank to the front. A correctly mounted steam tank cannot be moved.
8 Connect heating cable plugs into the corresponding sockets (see Abb. 5).
Important: make sure the cables are not crossed!
Attach connecting cables to the connectors of the overtemperature switch(es).
1
2
3
4
5
1
2
3
4
5
20
Abb.5: Connectingtheheatingcablesandtheconnectingcablesoftheovertemperatureswitch(es)
9. Insert the hocks of the lling cup into the opening in the lling cup support. Push lling cup upwards
until the xing clip engages.
Important: make sure the drain hose from water cup is inserted into the drain opening on the
bottom of the unit housing.
10. Reattach the unit cover and secure it with the retaining screw.
6.3.3 Inspecting the installed unit
Check the following points:
Is the unit installed in the correct place (see chapter6.3.1)?
Is the supporting surface stable enough?
Is the unit correctly aligned, vertically and horizontally?
Is the unit properly secured (see chapter6.3.2)?
Has the unit cover been relocated and correctly xed with the screw?
21
6.4 Steam installation
6.4.1 Overview steam installation
min. 5 %
Internal diameter
DS60: 30 mm (Small) / DS80: 45 mm (Medium)
–
min. 5 %
Rmin. 300 mm
min. 20 %
–
+
Rmin. 300 mm
Rmin. 300 mm
min. 300 mm
200 mm
Ømin.
min. 20 %
min. 500 mm
+
22
Fig.6: Overview steam installation
6.4.2 Positioning/mounting the steam distributor
It’s the responsibility of the customer to correctly position the steam distributor in the steam bath cabin.
WARNING!
Hot water vapour - Danger of scalding!
Shield the steam outlet of the steam distributor with corresponding measures to make sure steam bath
users can not be burned by the steam ow.
Important: The ambient pressure at the place of installation of the Nordmann Omega and the steam
distributor must be equal.
23
6.4.3 Installing the steam and condensate lines
6.4.3.1 Notes on installing the steam and condensate lines
– Use original steam and condensate hose from your Nordmann representative or solid steam
pipes from copper or stainless steel (min. DIN 1.4301) exclusively. Steam and condensate lines
from other material may cause undesired operational malfunctions.
– Initially, lead the steam line upright upwards min. 300 mm above the steam generator. Then
lead the steam line with a minimum upslope of 20 % and/or a minimum downslope of 5 % to the
steam distributor.
Important: ensure the steam hose can be disconnected later on from steam outlet connector on
steam tank for maintenance purpose. For that purpose the steam hose may be led more than
500 mm upright upwards.
– The condensate hose from the steam distributor is led down to the steam generator with a minimum
downslope of 20 %, via a condensate trap (min. hose bend diameter Ø200 mm) and there it is to
be connected to the appropriate connector on top of the unit (left connector= condensate ows back
into the steam tank (not recomended), right connector= condensate ows into the drain). Alternatively
the condensate hose can be led also directly into an open funnel.
Important! Before putting the unit into operation, the condensate trap of the condensate hose must
be lled with water.
– The steam line should be kept as short as possible (max. 8 m while observing the minimum bend
radius of 300 mm (for steam hoses) or 5 x internal diameter (with solid steam pipes), respectively.
Important! Allowance must be made for a pressure loss of approx. 100 Pa per meter steam line
and per 90° elbow.
– Important! When deciding on the length and layout of steam hoses, it should be noted that steam
hoses may become shorter and/or longer depending on temperature and age.
– The steam hose must be secured to the steam distributor and steam generator steam outlet by
means of hose clamps. Solid steam pipes should be connected to the steam distributor and steam
generator with short lengths of steam hose secured with hose clamps.
Caution! Do not overtighten the hose clamp on the steam connector of the steam generator.
WARNING!
Make sure that there is no tension on the steam hose since this could result in lifting the steam
tank out of the coupling sleeve. If necessary x steam hose right before the steam generator
with a strain relief device.
– Steam lines made of solid pipes (copper or stainless steel) must be insulated over the entire length
to minimize condensate formation (=loss).
DANGER!
Reducing the cross section or the complete closure of the steam line will cause an excessive
increase in pressure in the steam tank when the unit is operating and could lead to the risk of
scalding accidents. All installations must comply with the following instructions.
– When installing make sure the steam line is open over the entire length and through the whole cross
section. Any sealing plugs, adhesive sealing sheets etc. must be removed before connecting the
steam pipe. Reductions in cross section by kinking or crushing must be avoided.
24
– Steam hoses must be prevented from sagging (condensate pockets); if necessary, support steam
hose with pipe clamps, trough, or wall brackets, and install a condensate drain at any low points in
the steam line.
– It is not permitted to install a stop valve (e.g. a manually controlled stop valve, solenoid valve,
etc.) in the steam line, due to an inadmissible increase of pressure in the steam tank if the valve is
closed during the operation.
6.4.3.2 Installation examples
min. 20 %
+
min. 20 %
–
Ømin. 200 mm
min. 300 mm
Rmin. 300 mm
max. 8 m
min. 500 mm
Fig.7: Steamdistributorismountedmorethan500mmabovethetopedgeofthesteamgenerator
25
min. 5 %
Rmin. 300 mm
–
min. 20 %
+
Rmin. 300 mm
max. 8 m
min. 500 mm
Obstacle
min. 20 %
+
Rmin. 300 mm
min. 500 mm
max. 8 m
Install condensate drain (full size T)
at the lowest point
min. 5 %
–
Rmin. 300 mm
min. 20 %
–
Ømin.
200 mm
min. 20 %
+
min. 300 mm
Ensure adequate cooling
according to local codes
26
Fig.8: Steamdistributorismountedlessthan500mmabovethetopedgeofthesteamgenerator
min. 20 %
min. 5 %
–
–
min. 300 mm
min. 20 %
Ømin.
200 mm
+
Steam line must be insulated
over the entire length!
Piece of steam hose with
a min. length of 1,000 mm!
min. 1000 mm
min. 5 %
–
Fig.9: Steam line with solid piping and insulation
The following notes should be observed:
– The minimum internal diameter of the steam line (diameter dependent on the steam generator)
should be applied over the entire length of the piping.
– Use exclusively stainless steel (recommended, min. DIN 1.4301) or copper pipe.
– To minimize the condensate formation (=loss), the steam pipes must be insulated.
– Connection of the steam pipes to the steam distributor and the steam outlet connector on the steam
tank is effected with pieces of steam hose with an appropriate length (the length of the steam hose
connected to the steam outlet of the steam generator must be min. 1,000 mm) secured with hose
clamps.
– Important! Allowance must be made for a pressure loss of approx. 100 Pa per meter length or
per 90° bend.
27
6.4.4 Common steam and condensate line errors
2
3
4
5
1
Wrong Correct
1
Steam hose/steam hose piece not led at least 500 mm (for
steam hoses) or 1,000 mm (for solid piping) perpendicularly
upwards before rst bend (forming of condensate).
2 Minimum bend radius of steam hose/solid steam line not
maintained (forming of condensate).
3 Condensate trap not sufciently high and installed too near
at the steam distributor.
4 No condensate trap installed at vertical transition. Install condensate trap at all low points and before vertical
5 Steam line and condensate hose not sloped (slope min. 20 %). Install steam line always with constant up or downslope
Lead steam hose/steam hose piece at least 500 mm (for steam
hose installations) or 1,000 mm (for solid pipe installation)
perpendicularly upwards before rst bend.
The minimum bend radius of 300 mm for steam hoses or 5
times steam line internal diameter for solid steam lines must
be maintained.
The condensate trap must be at least 300 mm below the connector on the steam distributor and it must have a minimum
height of 200 mm (ø200 mm).
transitions.
of min. 15 % (8.5°) and condensate hose with constant
downslope of min.15 % (8.5°).
Fig.10: Commonsteamandcondensatelineerrors
28
6.4.5 Inspecting the steam installation
Use the following check list to ascertain that the steam installation was performed correctly:
– Steam distributor
Steam distributors correctly positioned and secured (screws tightened)?
Are unused condensate connectors on the steam distributor closed with a cap?
– Steam hose
Is maximum steam line length of 8 m maintained?
Is minimum steam hose length of 500 mm (for steam hose installations) or 1,000 mm (for solid
pipe installation) maintained before rst bend and led perpendicularly upwards?
Is upslope of at least 20 % or downslope of at least 5 % maintained?
Is minimum bend radius of 300 mm for steam hose maintained?
Have the instructions for hose positioning been followed?
Steam hose: no sagging (condensate pocket) or condensate drain with siphon (hose bend with
a minimum diameter of 200 mm) installed at the lowest point?
Steam hose(s) securely attached with clamps?
Heat expansion during operation and shortening of the hose with ageing taken into considera-
tion?
Rigid steam lines: properly insulated? Correct installation material used? Minimum internal di-
ameter maintained?
– Condensate hose
Downslope of at least 20 %?
Siphon (min. ø200 mm) existing and lled with water?
Condensate hose correctly xed and not kinked?
29
6.5 Water installation
6.5.1 Overview water installation
Water drain connector ø30 mm
(min. inner diameter 8 mm, supplied by others)
Water supply pipe
G 3/8"
Manometer
(supplied by others, recommended)
G 1/2" / G 3/8"
Filter valve (accessory) or
Shut-off valve and lter 125 µm
1...10 bar
1...40 °C
Filter cartridge
(Option, Size "S" oder "L")
Fig.11: Overview water installation
Water supply connector G 3/4"
Drain hose (supplied by others)
– internal diameter ø30 mm
– constant downslope (min 15 %/8.5°) to funnel
– must not touch funnel
– if using DI or RO water, use plastic hose or
stainless steel pipe only
ømin: 40 mm
Open funnel with trap
(supplied by others)
30
6.5.2 Notes on water installation
Notes: For the mounting of the optional lter cartridge please refer to notes given in the separate manual
supplied with lter cartridge.
Water supply
The water supply is to be carried out according to the gure found in
local regulations for water installations. The indicated connection specications must be observed.
– The installation of the lter valve (accessory "Z261", alternatively a shut-off valve and a water lter
can be used) should be made as close as possible to the steam generator.
– Admissible mains pressure 1.0 to 10.0 bar (hammer-free system)
For mains pressures >10 bar, the connection must be made via a pressure reducing valve (adjusted
to 1.0 bar). For mains pressures <1.0 bar please contact your Nordmann supplier.
– Notes on water quality:
– For the water supply of the Nordmann Omega, use exclusively untreated drinking water, water
from RO system or demineralised water from the lter cartridge.
– The use of additives in the water such as fragrance liquids, corrosion inhibitors, disinfectants,
etc. is not allowed, since these additives may endanger health and affect proper operation.
– If the Nordmann omega shall be operated with softened or partly softened water, please contact
your Nordmann representative.
– The connection material must be pressure-proof and certied for use in drinking water systems.
– Important! Before connecting the water line, the line should be well ushed out and deaerated.
CAUTION!
The thread at the steam generator connection is made of plastic. To avoid overtightening, the union
nut of the water pipe must be tightened by hand only.
chapter6.5.1 and the applicable
Water drain
The water drain is to be carried out according to the gure found in
regulations for water installations. The indicated connection specications must be observed.
– Make sure that the drain pipe, the funnel and the siphon are correctly xed and easily accessible for
inspections and cleaning purposes.
– The draining temperature is: 80…90 °C. Use temperature-resistant installation materials only!
– Attach drain line in such a way, that it cannot slip out of the funnel.
– The open end of the drain line must not touch the funnel (min. air gap 2 cm).
chapter6.5.1 and the applicable local
31
6.5.3 Inspecting the water installation
Check the following topics:
– Water supply
Has lter valve (accessory "Z261") or shut-off valve and 5 µm water lter respectively been
installed in supply line?
Have admissible water pressure (1 – 10 bar) and admissible temperature (1 – 40 °C) been ob-
served?
Does the supply capacity match the steam generator and is the minimum internal diameter of
8 mm of the supply pipe maintained throughout the entire length?
Are all components and pipes properly secured and are all threaded connections securely tight-
ened?
Is the water system properly sealed?
Does the water supply installation meet the requirements of the local regulations for water instal-
lations?
– Water drain
Is the minimum internal diameter of the drain pipe from the unit to the funnel of ø30 mm main-
tained throughout the entire length?
Is the minimum internal diameter of the drain pipe from the funnel to the waste water line of the
building of ø40 mm maintained throughout the entire length?
Has drain pipe been installed with a downslope of at least 15 %?
Has the heat resistance of the material used been veried to be at least 100 °C?
Is the drain hose properly secured (hose clamps at unit connection tightened)?
Is there an air gap (min 2 cm) between the open end of the drain line and the funnel?
Does the water drain installation meet the requirements of the local regulations for water instal-
lations?
32
6.6 Electric installation
6.6.1 Notes on electrical installation
DANGER!
Danger of electric shock
The Nordmann Omega 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: The Nordmann Omega unit must be connected to the mains only after all mounting and
installation work has been completed, all installations have been checked for correct workmanship
and the unit is closed and properly locked.
CAUTION!
The electronic components inside the unit are very sensitive to electrostatic discharge. Before carrying
out installations work inside the unit, appropriate measures must be taken to protect the electronic
components against damage caused by electrostatic discharge (ESD protection).
– All work concerning the electrical installation must be performed only by skilled and qualied
technical personnel (e.g. electrician with appropriate training) authorised by the owner. It is
the owner’s responsibility to verify proper qualication of the personnel.
– The electrical installation must be carried out according to the wiring diagram (see chapter6.6.2),
the notes on electrical installation as well as the applicable local regulations. All information given
in the wiring diagram and additional notes must be followed and observed.
– All cables must be lead into the unit, via appropriate cable strain relief or grommets (supplied by
others).
– Make sure the cables are adequately clamped, do not rub on any components or become a tripping
hazard.
– Observe and maintain maximum cable length and required cross section per wire according to local
regulations.
– The mains supply voltage must match the respective voltage stated on the rating plate.
33
6.6.2 Wiring diagram Nordmann Omega
Nordmann Omega
Control board
X10
COM
NC
NO
Error Out
X33
X36
X16
M
X9
DRAIN PUMP
BAT
CR 2032
RES I/O / DEMAND IN / TEMP IN
X21X12
GND
X12
24VDC
Spare
Spare
GND
24VDC
DEMAND IN
GND
F2
RJ45
TEMP +
TEMP –
X11
LEVEL
X23
X24
X6
INLET
SAFETY C
X5
X8
B1
B1
D1
F3
J2
J1
SC
Q4
F4
Q4
K1
L1 L2 L3
L1 L2 L3
400 V/3~/50..60 Hz
N
PEN
XE1
PE
24VDC
DEMAND IN
B2
DEMAND IN
GND
TEMP +
TEMP –
+ –
A2
P/PI
+ –
A1
T
A1 Temperature sensor (PT100/PT1000/KTY)
A2 External temperature Controller
B1 Excess temperature switch steam tank (one or two)
B2 On/Off push button (Start steam operation)
B3 Potential free conacts (NC) of external monitoring devices
BAT Backup battery (CR2032, Lithium 3V)
D1 Touch-Display intern (Option)
D2 Touch-Display extern (Zubehör)
F2 Internal fuse 1 A, slow acting (250V)
F3 Internal fuse mains supply (250 V / 6.3 A, slow acting)
F4 External fuse supply voltage (see fuse table in
chapter6.6.4)
J1 Short circuited, if no safety monitoring devices are connected
J2 Cable bridge heating contactor - Fuse F3
K1 Heating contactor
M Pump motor
Q4 Electrical isolator voltage supply
RJ45 Network connector for uploading software updates
SC External safety loop
XE1 Connection terminals "N" and "PE"
Fig.12: Wiring diagram Nordmann Omega
B3
B3
D2 D2
F4
L1 N PE
230 V/1~/50..60 Hz
34
6.6.3 Installation work external connections
6.6.3.1 Connecting the control wiring
Connecting a temperature signal
RES I/O / DEMAND IN / TEMP IN
X12
Control compartment
GND
24VDC
Spare
Spare
GND
A1
24VDC
DEMAND IN
GND
TEMP +
TEMP –
TEMP +
TEMP –
+ –
T
Connecting a demand signal of an external controller
RES I/O / DEMAND IN / TEMP IN
X12
GND
24VDC
Spare
Spare
GND
24VDC
DEMAND IN
GND
TEMP +
TEMP –
The signal cable of a temperature sensor (if the internal
P/PI controller is used) is to be connected according
to the wiring diagram to the terminals "TEMP +" and
"TEMP –" of the terminal block "X12" on the control
board in the steam generator. The connecting cable
must be led through a cable gland into the unit.
Note: the admissible control signal values can be found
in the technical data table in this installation and operation manual.
The signal cable of an external controller is to be connected according to the wiring diagram to the terminals
"DEMAND IN" and GND" of the terminal block "X12"
on the control board in the steam generator. The connecting cable must be led through a cable gland into
the control compartment.
Control compartment
A1
DEMAND IN
GND
+ –
P/PI
Note: the admissible humidity control signal values
can be found in the technical data table in the operation manual.
35
6.6.3.2 Connecting an external On/Off push button
RES I/O / DEMAND IN / TEMP IN
An external On/Off push button is to be connected according to the wiring diagram to the terminals "24VDC"
and "Demand IN" of the terminal block "X12" on the
control board in the steam generator. The connecting
X12
GND
24VDC
Spare
Spare
GND
24VDC
DEMAND IN
GND
TEMP +
TEMP –
cable must be led through a cable gland into the unit.
Note: the external On/Off push button is used to manually start ans stop steam operation.
Control compartment
24VDC
DEMAND IN
B2
6.6.3.3 Connecting the external safety chain
The potential-free contacts of external moni t or ing devices "B3" of the external safety chain "SC" are connected in series (if more than one moni t or ing device are
connected) to the terminal block "X8" on the control
board in accordance with the wiring diagram.
The connecting cable must be led through a cable gland
into the control compartment.
SC
Note: If, for whatever reason, no external monitoring
devices are connected, a wire jumper "J1" must be
B3
connected to terminal block "X8".
B3
CAUTION! Do not apply any external voltage to
terminal block "X8" via the contacts of the external
monitoring devices "B3".
Control compartment
Do not apply external voltage to terminal "X8" via
the contacts of the external
monitoring devices "B3"!
J1
X8
SAFETY C
36
6.6.3.4 Connecting the internal (option) or external (accessory) touch display(s)
The optional internal touch display "D1" is connected ex
X11
X23
X24
Control compartment
D1
D2 D2
factory to CAN BUS terminal "X23" on the control board.
If the optional internal touch display "D1" is used an additional external touch display "D2" can be connected
to the CAN BUS terminal "X23". If no optional internal
touch display "D1" is used an additional external touch
display "D2" can be connected to each of the CAN BUS
terminals "X23" and "X24".
Via the second CAN BUS connector of the internal or
external touch display up to a max of 8 touch displays
can be connected to the CAN BUS. Further information
can be found in the separate manual supplied with the
external touch displays.
6.6.3.5 Connecting the voltage supply
K1
F3
PEN
XE1
The voltage supply (L1, L2, L3, N and PE or L1, N
and PE) is to be connected in accordance with the
wiring diagram to the corresponding screw terminals of the heating contactor (L1, L2 and L3) and the
screwless-type terminals "N" and "PE" in the unit. The
supply wiring is to be fed into the unit via the cable gland
with strain relief.
J2
Control
compartment
L1 L2 L3
Q4
F4
L1 L2 L3
400 V/3~/50..60 Hz
Q4
F4
L1 N PE
230 V/1~/50..60 Hz
Connecting the cables to screwless-type terminals "N"
and "PE": To connect the cables insert the stripped cable
ends until they come to a stop.
Important: stranded wire cables must be equipped
with wire end ferrules before connecting the wires to
the terminals.
CAUTION! Make sure that the cable bridge "J2" from
heating contactor "K1" to fuse "F3" does not fall out
when connecting the phase wire to terminal "L1" on the
heating contactor.
The installation of the fuses "F3" and the electrical
isolator "Q3" (all pole disconnecting device with a
PE
N
minimum contact clearance of 3 mm, supplied by others) in the mains supply line are mandatory.
Note: a table with the values for the fuses "F3" is to be
found in
chapter6.6.4.
The electrical isolator must be mounted in direct proximity of the control compartment (max. distance 1 m)
and must be easily accessible in a height between 0.6
m and 1.9 m (recommended: 1.7 m) .
CAUTION! Make sure the voltage indicated on the rating plate meets the local mains voltage. Otherwise, do
not connect the unit.
The cross-section of the mains cable must comply with
the applicable local regulations.
37
6.6.4 Performance data / Fuses "F3" voltage supply
230V/1~/50...60 Hz 400V/3~/50...60 Hz
S
M
Nordmann
Omega
max.
max.
N
N
in kW
Max. steam capacity
in kg/h
4 4.0 3.5 15.3 2.5 16 –– –– –– –– ––
8 –– –– –– –– –– 8.0 6.5 15.3 2.5 16
12 –– –– –– –– –– 12.0 9.5 15.3 2.5 16
16 –– –– –– –– –– 16.0 12.5 26.1 6.0 32
20 –– –– –– –– –– 20.0 15.5 26.1 6.0 32
I
P
2
min. in mm
in A
L
Cable cross section
A
6.6.5 Inspecting the electrical installation
Check the following points:
Does the supply voltage comply with the voltage stated on the rating plate and is the voltage supply
connected in accordance with the wiring diagram?
Is the voltage supply correctly fused?
Is the electrical isolator "Q3" installed in the voltage supply line?
Are all components correctly connected according to the wiring diagram?
Are all connecting cables fastened?
Fuses "F3"
in A, quick acting (gR)
Max. steam capacity
in kg/h
max.
N
in kW
P
max.
N
I
in A
Cable cross section
2
min. in mm
L
Fuses "F3"
A
in A, quick acting (gR)
Are the connecting cables free of tension (passed through cable glands?)
Does the electric installation meet the applicable local regulations for electric installations?
Is the unit cover relocated and xed with the retaining screw?
38
7 Appendix
27
7.1 Unit dimensions
7.1.1 Unit dimensions unit "Small" (Omega Pro 4...8)
G 3/4"
150
30
14
122,5
350
24
75
70,5
ø10
238
ø30
470
35
25
225
65
219.5
308
97
251.5
22
111
27
Fig.13: Unitdimensionsunit"Small"(dimensionsinmm)
39
7.1.2 Unit dimensions unit "Medium" (Omega Pro 12...20)
270
77
185,5
350
68
73
ø10
228.5
ø45
470
45
65 348 57
25
225
G 3/4"
30
24
22.5
231
27
27
Fig.14: Unitdimensionsunit"Medium"(dimensionsinmm)
209.5 261.5
40
Notes
Notes
CH94/0002.01
Nordmann Engineering AG
Lindenhofstrasse 28, 4052 Basel, Switzerland
Phone +41 61 404 46 50, Fax +41 61 404 46 79
www.nordmann-engineering.com,
info@nordmann-engineering.com
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