systemair ZRS 170 Smoke Gas Fan Instruction Manual
- June 13, 2024
- systemair
Table of Contents
- Introduction
- Safety
- Transportation and storage
- Installation
- Electrical connection
- Commissioning
- Operation
- Maintenance
- Troubleshooting
- Disposal
- Warranty
- Technical data
- EU Declaration of Conformity
- UK Declaration of Conformity
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
ZRS Smoke gas fan
Installation, Operation and
Maintenance instruction
Introduction
1.1 Product description
The product is a smoke gas fan with an AC motor.
The product is not supplied with an external speed control or power switch.
1.2 Intended use
The product is intended to prevent insufficient draft from stoves, ovens and
fire places. The maximum temperature of transported air is 200 °C.
The product is not applicable for transportation of air that contains
explosive, flammable or aggressive media. The product is not applicable for
locations where there is a risk of explosion.
1.3 Document description
This document contains instructions for installation, operation and
maintenance of the product. The procedures must be done by approved personnel
only.
Speak to Systemair for more information on how to install the product in
different installation locations.
1.4 Product overview
1. Casing | 5. Connection box |
---|---|
2. Protection grille | 6. Steel wire |
3. Insulation carpet | 7. Steering rods |
4. Name plate with airflow direction arrow |
1.5 Name plate
- Type designation: Product name, dimension and motor type. Refer to 1.5.1 Type designation page 2.
- Input power, W
- Frequency, Hz
- Certifications
- Scannable code 1
- Find more information about the product on the Systemair documentation portal 1
- Country of production
- Airflow direction arrow
- Weight, kg
- Serial number: part number/production number/produc- tion date
- IP class, enclosure class
- Current, A
- Voltage, V
Use a mobile device to scan the scannable code and go to the Systemair documentation portal for more documentation and document translations.
Note:
The data on the name plate applies to “standard air” that is specified in the
standard ISO5801.
1.5.1 Type designation
Product name | ZRS |
---|---|
Dimension | 170 |
180
Motor type| AC, 1–phase, 230 V
1.6 Product liability
Systemair is not liable for damages that the product causes in these
conditions:
- The product is incorrectly installed, operated or maintained.
- The product is repaired with parts that are not original spare parts from Systemair.
- The product is used together with accessories that are not original accessories from Systemair.
- The product is used without motor protection.
Safety
2.1 Safety definitions
Warnings, cautions and notes are used to point out specially important parts
of the manual.
Warning
If you do not obey these instructions, there is a risk of death or injury.
Caution
If you do not obey these instructions, there is a risk of damage to the
product, other materials or the adjacent area.
Note:
Information that is necessary in a given situation.
2.2 Safety instructions
Warning
Read the warning instructions that follow before you do work on the product.
-
Read this manual and make sure that you understand the instructions before you do work on the product.
-
Obey local conditions and laws.
-
The ventilation contractor and the operator are responsible for correct installation and intended use.
-
Keep this manual at the location of the product.
-
Do not install or operate the product if it is defective.
-
Do not remove or disconnect safety devices.
-
Make sure that you can read all warning signs and labels on the product when it is installed. Replace labels that have damage.
-
Only permit approved personnel to work on the product and to be in the adjacent area during all work on the product.
-
Make sure that you know how to stop the product quickly in an emergency.
-
Use applicable safety devices and personal protective equipment during all work on the product.
-
Before you do work on the product, stop the product and wait until the fan impeller stops. Make sure that there is no voltage on the motor terminals.
-
If the maintenance is not correctly and regularly done, there is risk of injury and damage to the product.
-
Only do the maintenance as given in this manual. Speak to Systemair technical support if other servicing is necessary.
-
Always use spare parts from Systemair.
-
Sound levels exceeding 70 dB(A) may occur depending on model and size. Visit www.systemair.com for more detailed information about your product.
The product is not to be used by persons, including children, with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction. -
Do not allow children to play with the device.
2.3 Personal protective equipment
Use personal protective equipment during all work on the product.
- Approved eye protection
- Approved protective helmet
- Approved hearing protection
- Approved protective gloves
- Approved protective shoes
- Approved work clothing
Transportation and storage
Warning
Make sure that the product does not become damaged or wet during
transportation. A damaged or wet product can cause fire or electric shock.
- Before you move the product to the installation location, examine the packaging for damages.
- Do not move the product by the cables, terminal box, fan impeller, protection grille, inlet cone or silencer.
- If lifting equipment is used, make sure that the lifting equipment can hold the weight of the product. Refer to the name plate for information. Do not lift the product by the packaging.
Warning
Do not walk below a lifted product.
- Keep the correct side of the packaging up during transportation. Refer to the arrows on the packaging.
- Load and unload the product carefully.
- Keep the product in a dry and clean location during storage. Make sure that the ambient temperature during storage is between –10 and +30 °C. A stable ambient temperature prevents damage from condensation.
- Keep the product in storage for maximum 1 year.
Installation
4.1 To do before the installation of the product
- Use installation material with fire resistance rating for the installation location.
- Examine the packaging for transportation damage and remove the packaging from the product carefully.
- Examine the product and all components for damage.
- Make sure that the motor effect and the fan performance agrees with the expectations at the installation location.
- Make sure that the information on the name plate and the motor name plate agrees with the operation conditions.
- Install the product in a location where there is space for commissioning, troubleshooting and maintenance.
- Make sure that the installation location is clean and dry, for full safety during electrical work.
- Make sure that the installation surface has sufficient capacity to hold the weight of the product.
- Refer to the airflow direction arrows on the name plate or on the product to install the product in the correct position.
- Make sure that all cable glands are tight against the ca- bles to prevent leaks.
4.2 To Install the product
Note: Make sure that the installation location has space for maintenance.
Note: Install the product so that unwanted vibrations are not transmitted to
duct systems or roof beams.
Note: The product must be installed horizontally.
Note: Obey local laws and regulations for installation of the smoke gas fan.
- Put the supplied insulation carpet on top of the chimney or duct system.
- Cut a hole in the insulation carpet. Make sure that the hole has the same dimension as the inlet cone of the fan.
- Install the 4 adjustable steering rods in the holes in the bottom plate of the fan. Use the supplied screws and nuts.
- Push the fan and steering rods into the chimney. It is not necessary to attach the fan with screws in the chimney, the steering rods keeps the fan in position.
- Attach the supplied steel wire. The steel wire keeps the product on the roof when it is temporarily lifted away from the chimney during chimney sweeping. The product is not supplied with screws and plug to attach the steel wire.
- Connect the mains supply to the connection box of the product. Refer to 12.3 Wiring diagrams page 12.
Note:
The cable has a steel housing that can discolour over time as it weathers in. The coloring of the steel housing will not decrease the protection of the cable.
Electrical connection
5.1 To do before the electrical connection
- Make sure that the electrical connection agrees with the product specification on the motor name plate.
- Make sure that the environment for electrical connection is clean and dry.
- Make sure that the wiring diagram that is included with the supply of the product agrees with the terminals in the connection box.
5.2 To connect the product to the power supply
- Complete the electrical connection for the motor. Refer tothe motor wiring diagram that is included with the product.
- Make sure that the cross section of the protective earthing is equal to or larger than the cross section of the phase conductor.
- Install a circuit breaker in the permanent electrical installation, with a contact opening of a minimum 3 mm at each pole.
- If a residual current device (RCD) is installed, make sure that it is an all-current sensitive RCD. Consider if the product has a frequency converter, uninterruptible power supply (UPS), or an EC motor. EC motors have a leakage current to earth that is <=3.5 mA.
5.3 Speed controller for AC motors
Note:
The speed controller alternatives are different for different motor types.
Make sure that your motor is compatible with the speed controller type before
you use it.
The speed can be controlled by voltage reduction using a transformer. It is
also possible to control the fan speed with frequency converter if the
installed frequency converter has built in all-pole sine filter and shielded
cables are not needed.
5.4 To install motor protection for AC motors
- If the product has an built in motor protection, reset by disconnecting the product from power for 60 seconds.
- If the motor has temperature monitors such as thermal contacts (TK) or thermistors lead out into the terminal box, these must always be connected in the control circuit us- ing appropriate motor protection.
- Make sure that an overheated motor cannot start again automatically when it becomes cool.
- Install the motor cables and the temperature monitor apart.
- If the motor does not have temperature monitors, install a motor protection switch.
Commissioning
Caution
- If strong vibrations occur during commissioning, immediately increase or decrease the fan speed until the vibrations are decreased. Continuous strong vibrations can cause damage to components.
- Do not increase the fan speed to a higher rpm value than the maximum value that is given on the name plate.
6.1 To do before the commissioning
- Make sure that the installation and electrical connection are correctly done.
- Visually examine the product and accessories for damage.
- Make sure that the safety devices are correctly installed.
- Make sure that there are no blockages in the air inlet and the air outlet.
- Make sure that installation material and unwanted objects are removed from the product and the ducts.
6.2 To do the commissioning
-
Set the installed safety switch in the OFF position.
-
If it is possible to get access to the fan impeller, do the steps that follows:
a. If it is necessary, remove parts of the installation.
b. Turn the fan impeller by hand and make sure that it turn easily.
c. Record the result in the commissioning report. -
Make sure to turn the product in a direction that agrees with the related arrow on the product.
a. Record the result in the commissioning report. -
If you removed parts of the installation to get access to the fan impeller, install the removed parts again.
-
Set the installed safety switch in the ON position.
-
Start the product.
-
Set the minimum operation speed.
-
Increase the operation speed gradually to the maximum operation speed.
a. Examine the vibrations in the casing and the bearing areas at all speed levels.
b. Make sure that the vibrations agree with the specifications in DIN ISO -
c. Make sure that none of the speed levels cause un- wanted noise in the product.
d. Record the result in the commissioning report. -
Record the necessary data in the commissioning report.
Operation
7.1 To start a product with an AC motor
- Set the installed safety switch in the ON position.
- Install the external speed controller. Refer to the instruction manual for the installed speed controller.
7.2 To stop the product
-
Set the installed speed controller in the OFF position.
Refer to the instruction manual for the installed speed controller. -
Set the installed safety switch in the OFF position.
7.2.1 To stop the product in an emergency
• Set the installed safety switch in the OFF position.
Maintenance
Warning
Set the installed safety switch in the OFF position before you do the
maintenance unless the instructions tell you differently. Make sure that the
safety switch is not accidentally set in the ON position.
8.1 Maintenance schedule
The intervals are calculated from continuous operation of the product.
Maintenance task| Usual operation conditions| Unusual
operation conditions. 1
---|---|---
Each 6 months| Each year| Each 3 months| Each 6 months|
Each year
Visually examine the product and its components for damage, corrosion and
dirt.| | X| | X|
Examine the fan impeller for damage and imbalance.| | X| | X|
Clean the product and the ventilation system.| X| | X| |
Do a check of all fasteners and make sure that they are fully tightened.| | X|
| | X
Make sure that the product and its components are correctly operated.| X| | |
X|
Measure the power consumption and compare the result with the information on
the name plate.| | X| | X|
If vibration dampers are installed, make sure that they operate correctly and
examine them for damage and corrosion.| | X| | | X
Make sure that the electrical protective equipment and the me- chanical
protective equipment operates correctly.| | X| | | X
Make sure that you can read the name plates of the product.| | X| | X|
Examine all cable connections for damage. Make sure that the cable glands are
tight against the cables.| | X| | | X
If flexible connections are installed, examine them for damage.| X| | | X|
1. The unusual operation conditions are classified as follows: If a stable ambient temperature is higher than 30 °C or lower than -10° C, if the temperature changes are large or if very contaminated air is transported.
8.2 To clean the product
Caution
- Do not clean the product with a highpressure washer.
- Do not clean the product with steel brushes or sharp objects.
- Do not bend the fan impeller blades.
- Be careful not to move the balance weights on the fan impeller.
- Remove dirt from the fan and the duct.
- If access to the fan impeller is possible, clean the fan impeller with a moist cloth or soft brush.
8.3 Spare parts
- For information about spare parts, send an e-mail to support@systemair.com.
- For more information about spare parts, contact Systemair support.
- Always use spare parts from Systemair.
- When you send an order for spare parts, include the serial number of the product. The serial number is found on the name plate.
Troubleshooting
Note:
If you cannot find a solution to your problem in this section, speak to
Systemair technical support.
Problem | Cause | Solution |
---|
**** The product does not operate smoothly.
| The fan impeller is not correctly balanced.| Speak to Systemair technical
support.
There is dirt on the fan impeller.| Clean the fan impeller carefully. Refer to
8.2 To clean the product page 7.
The fan impeller has damages or deformations because the transported air
contains aggressive media.| Speak to Systemair technical support.
The fan impeller does not turn in the correct direction.| Make sure that the
electrical connection is correctly done.
The fan impeller has deformations because of too high temperatures.| •
Replace the fan impeller.
• Make sure that the temperature of the transported air is not higher than the value on the name plate.
There are unusually strong vibrations in the product or the duct system.| Make
sure that the product is correctly installed. Do a check of the duct system.
The product is operated in a resonant frequency range.| Increase or decrease
the fan speed until the product operates smoothly. Refer to 6 Commissioning
page 6.
**** The air output is not sufficient.
| The fan impeller does not turn in the correct direction.| Make sure that the
electrical connection is correctly done.
The electrical connection is not correctly done.| Make sure that the
electrical connection agrees with the wiring diagrams.
The air pressure is too low because of incorrect installation.| Do the
necessary changes in the duct system and installed components to increase the
air pressure. Refer to 6 Commissioning page 6.
The airflow shutters are closed or not fully open.| Adjust the airflow
shutters.
There is blockage in the air inlet or the duct system.| Remove the blockage.
The product is not applicable for the installation location.| Make sure that
the product is applicable for the installation location.
The motor power is decreased because of too high temperature in the motor.
**Note:
** This is applicable for EC motors only.
| • Do a check of the ambient temperature.
• Make sure that the space around the motor is sufficient to keep the temperature down.
There is unusual noise when the product starts or operates.
| There is strain in the connections of the duct system.| Loosen the connections, align the parts of the duct system correctly and tighten the connections.
Thermal contacts, PTC or resistors are released.
| The fan impeller does not turn in the correct direction.| Make sure that the
electrical connection is correctly done.
---|---|---
A phase loss occurred.| If the motor is a 3-phase motor, make sure that no
phase is missing.
Note:
This is not applicable for EC motors.
The motor is overheated.| • Do a check of the motor cooling impeller.
• If it is possible, measure the resistance to do a check of the motor winding.
The capacitor is not connected or not correctly connected.
**Note:**
This is not applicable for EC motors or 3–phase AC motors.
| Connect the capacitor correctly. Refer to the included motor wiring diagram.
There is blockage in the motor.| Speak to Systemair technical support.
The fan speed does not get the nominal value.
| Defective motor winding.| If it is possible, measure the resistance to do a
check of the motor winding.
The speed control is not correctly set.| Set the speed control correctly.
The fan impeller cannot turn freely because of mechanical blockage.| Remove
the blockage.
Phase loss occurs.| If the motor is a 3-phase motor, make sure that no phase
is missing.
The motor does not rotate.
| A component in the power supply is defective.| Do a check of the power
supply. Replace defective components and connect the power supply again.
The electrical connection is not correctly done.| Make sure that the
electrical connection agrees with the wiring diagrams.
The motor protection is released because the motor is overheated.| Let the
motor become cool. Reset the motor protection. Find the cause of the
overheated motor.
A phase loss occurred.| If the motor is a 3-phase motor, make sure that no
phase is missing.
The electronic components or the motor is overheated.
| The motor is overloaded or the ambient temperature is too high.| Let the
motor become cool. Reset the motor protection. Find the cause of the
overheated motor.
The motor is overloaded.| Make sure that the product is applicable for the
installation location.
The ambient temperature is too high.| Make sure that the product is applicable
for the installation location.
The cooling of the product is not sufficient.| Make sure that the space around
the motor is sufficient to keep the temperature down.
Disposal
The product follows the WEEE directive. This symbol on the product or the packaging of the product shows that this product is not domestic waste. The product must be recycled at an approved disposal location for electrical and electronic equipment.
10.1 To disassemble and discard
the parts of the product
- Disconnect and disassemble the product in the opposite sequence of electrical connection and installation.
- Recycle the product parts and the packaging at an applicable disposal location.
- Obey the local and national requirements for disposal.
Warranty
For warranty claims, send a written maintenance plan and the commissioning report to Systemair. The warranty is only applicable for these conditions:
- The product is correctly installed and operated.
- Motor protection is used.
- The instructions in the data sheets are obeyed.
- Maintenance instructions are obeyed.
- A product that is not operated continuously is operated for a minimum of 1 hour each month.
Technical data
12.1 Technical data overview
Max. temperature of transported air, °C | 200 |
---|---|
Max. ambient temperature, °C | **** Refer to the data sheet in the online |
catalogue at www.systemair.com.
Sound pressure, dB
IP class
Voltage, current, frequency, enclosure class, weight| **** Refer to the name
plate. Refer to 1.5 Name plate page 1 for more information.
Motor data| Refer to the motor name plate or the technical documentation from
the motor manufacturer.
12.2 Product dimensions
Note: If the unit of measure is not specified, the dimensions are given in
millimetres.
| A| B| ØC| D (max/min)
---|---|---|---|---
ZRS 170–180| 300| 180| 132| 100/230
12.3 Wiring diagrams
Abbreviation in wiring diagram | Cable colour |
---|---|
RD | Red |
YE | Yellow |
BU | Blue |
WH | White |
GN | Green |
BN | Brown |
BK | Black |
GR | Grey |
GY | Green/Yellow |
12.3.1 Wiring diagrams for ZRS fans
ZRS fans | 1–phase 230 V |
---|---|
ZRS 170–180 |
12.3.2 Wiring diagrams for speed controller for AC motors
Note: The selection of electrical accessories must be done in line with the
technical parameters of the product.
RE|
---|---
Manual 5-step transformer.| ****
A. Relay connection. There is always 230 V between ~ and N when the
transformer knob is in one of the positions 1–5.
B. Mains supply
C. Earth
D. Fan
REE — Thyristor|
---|---
REE 1 and REE 2 – Surface mounting or with flush mounting
casing included.
REE 4 – Surface mounting.
Starting currents must be considered when you select the
speed controller type. Products that are used with this
speed controller must have a built-in overheating protection
and must be designed for thyristor speed control.
- L: the connection with cutting function on the speed control.
- (L): the connection without cutting function.
REU|
---|---
Manual 5-step transformer for high/low speed operation. Used together with a
change-over contact, for example a tim- er or a thermostat.|
- External change-over contact
- Left selector switch
- Right selector switch
A. Fan
B. Earth
C. Mains supply
RTRE|
---|---
Manual 5-step transformer with motor protection.|
A. Relay connection. There is always 230 V between ~ and N when the
transformer knob is in one of the positions 1–5.
B. Mains supply
C. Earth
D. Fan
E. Thermostat
F. Motor protection. If the motor protection is not in use, Tk must be looped
together.
FRQ5S-E-6A
Frequency converter with built-in all-pole sine filter and 5-step switch.
A.
Contact rating, maximum AC 250 V/2 A
B. Mains supply, 1–phase 208…277 V, 50/60 Hz
C. Motor with internal thermal contacts
D. OFF/ON
RTRD
A 3-phase transformer that controls the fan speed by altering the supply
voltage in five fixed steps. The steps are adjusted by using the control knob
on the front of the unit.
A. If the
function is not necessary, the terminals must be bridged
B. Contact rating, 230 V AC/maximum 1 A
C. OFF/ON
D. OFF/ON (only by reset)
E. Mains supply, 3–phase 400 V 50/60 Hz
F. 3–phase motor with internal thermal contacts
RTRDU
Manual 5–step transformer with motor protection — a 3–phase transformer that
controls the fan speed by altering the supply voltage in five fixed steps. The
steps are adjusted by using the control knob on the front of the unit.
A. If the function is not necessary, the terminals must be bridged
B. Contact rating, 230 V AC/maximum 1 A
C. Time switch
D. OFF/ON
E. OFF/ON (only by reset)
F. Mains supply, 3–phase 400 V 50/60 Hz
G. 3–phase motor with internal thermal contacts
EU Declaration of Conformity
We, the manufacturer
Manufacturer | Systemair Sverige AB |
---|---|
Address | Industrivägen 3 |
739 30 Skinnskatteberg Sweden
declare under our sole responsibility that the products
Type/Model : ZRS
fulfils the relevant provisions of following directives and standards
Machinery Directive 2006/42/EC
ISO 12100:2010
Safety of machinery – General principles for design – Risk assessment and risk
reduction
ISO 13857:2019
Safety of machinery – Safety distances to prevent hazard zones being reached
by upper or lower limbs
60204-1:2018
Safety of machinery – Electrical equipment of machines – Part 1: General
requirements
60335-1:2012
Household and similar electrical appliances – Safety Part 1: General
requirements.
60 335-2-80:2003
Household and similar electrical appliances – Safety – Part 2-80: Particular
requirements for fans.
50106:2008
Safety of household and similar appliances – Particular rules for routine
tests referring to appliances under the scope of
60 335-1.
60529:2014
Degrees of protection provided by enclosures (IP Code).
Directive electromagnetic compatibility (EMC) 2014/30/ EU
62233:2008
Measurement methods for electromagnetic fields of household appliances and
similar apparatus with regard to human exposure
61000-6-2:2005
Electromagnetic compatibility (EMC) – Part 6-2: Generic standards – Immunity
for industrial environments.
RoHS Directive 2011/65/EU
EN IEC 63000:2018
Technical documentation for the assessment of electrical and electronic
products with respect to the restriction of hazardous substances
All Ecodesign implementing measures made under Ecodesign Directive 2009/125/EC
327/2011 Requirements for fans above 125W
1253/2014 Requirements for ventilation units above 30W
1254/2014 Requirements for energy labelling of residential ventilation units
EN ISO 5801:2017
Fans – Performance testing using standardized airways.
EN 13142:2021
Ventilation for buildings – Components/Products for residential ventilation –
required and optional performance characteristics.
Persons authorized to compile the technical file:
Technical Manager
This declaration relates exclusively to the machinery in the state in which it
was placed on the market and excludes components which are added or operations
carried out subsequently by the final user.
Skinnskatteberg, Sweden 2022-06-01
Managing Director
UK Declaration of Conformity
We, the manufacturer
Manufacturer | Systemair Sverige AB |
---|---|
Address | Industrivägen 3 |
SE-73930 Skinskatteberg Sweden
declare under our sole responsibility that the products
Type/Model | ZRS |
---|
fulfils the relevant provisions of following directives and standards
Supply of Machinery (Safety) Regulations 2008
ISO 12100:2010
Safety of machinery – General principles for design – Risk assessment and risk
reduction
ISO 13857:2019
Safety of machinery – Safety distances to prevent hazard zones being reached
by upper or lower limbs
60204-1:2018
Safety of machinery – Electrical equipment of machines – Part 1: General
requirements
60335-1:2012
Household and similar electrical appliances – Safety Part 1: General
requirements.
60 335-2-80:2003
Household and similar electrical appliances – Safety – Part2-80: Particular
requirements for fans.
50106:2008
Safety of household and similar appliances – Particular rulesfor routine tests
referring to appliances under the scope of
60 335-1.
60529:2014
Degrees of protection provided by enclosures (IP Code).
Electromagnetic Compatibility Regulations 2016
62233:2008
Measurement methods for electromagnetic fields of household appliances and
similar apparatus with regard to human exposure
61000-6-2:2005
Electromagnetic compatibility (EMC) – Part 6-2: Generic standards – Immunity
for industrial environments.
The Restriction of the Use of Certain Hazardous Substances in Electrical and
Electronic Equipment
Regulations 2012
EN IEC 63000:2018
Technical documentation for the assessment of electrical and electronic
products with respect to the restriction of
hazardous substances
The Ecodesign for Energy-Related Products and Energy Information (Amendment)
(EU Exit) Regulations 2019
327/2011 Requirements for fans above 125W
1253/2014 Requirements for ventilation units above 30W
1254/2014 Requirements for energy labelling of residential ventilation units
EN ISO 5801:2017
Fans – Performance testing using standardized airways.
EN 13142:2021
Ventilation for buildings – Components/Products for residential ventilation –
required and optional performance characteristics.
Persons authorized to compile the technical file:
Technical Manager
This declaration relates exclusively to the machinery in the state in which it
was placed on the market and excludes components which are added or operations
carried out subsequently by the final user.
Skinnskatteberg, Sweden 2022-06-01
Managing Director
Systemair Sverige AB
Industrivägen 3
SE-739 30 Skinnskatteberg
+46 222 440 00
mailbox@systemair.com
www.systemair.com
© Copyright Systemair AB All rights reserved EOE
Systemair AB reserves the rights to alter their products without notice. This
also applies to products already ordered, as
long as it does not affect the previously agreed specifications.
Document in original language
2022-06-21
References
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