Welcome
Thank you for purchasing your new Schweigen Isodrive system. To achieve maximum output, please read this guide thoroughly before use and installation. This guide contains important information on correct use, maintenance, and safety notes to ensure your personal safety and the lasting value of your Isodrive system. Please retain your proof of purchase for warranty queries. This appliance and its packaging are produced with minimal waste and respect for the environment. Help us protect the environment by using the appliance efficiently and disposing of packaging responsibly.
Your Safety
Receiving Your Rangehood
Read this section before operating the appliance. Inspect your product upon receipt. Any damage or defects MUST be reported within 48 hours for a claim to be recognised. DO NOT INSTALL THIS APPLIANCE IF YOU FIND IT DAMAGED. If installed damaged, the supplier or retailer is not responsible for associated repair, replacement, removal, or re-installation costs. This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience/knowledge, unless supervised or instructed by a responsible person. Children should be supervised to ensure they do not play with the appliance, as it is not a toy. Do not install the Isodrive motor to a non-Schweigen and/or non-silent rangehood, as this will void your warranty. The manufacturer declines all responsibility for failure to adopt proper safety measures. Ensure the installation location has good and permanent ventilation. Consult local laws and regulations for installation. Use an electrical connector with earth suitable for your location. Verify that the voltage in your area corresponds to the appliance's rating label.
Before Installation
It is recommended that this appliance be installed or repaired by an experienced Home Appliances technician. Visit www.schweigen.com.au for a list of experienced installers. Modifying any part of this appliance is dangerous and will immediately void the warranty.
Electrical Cord
Ensure the supply cord is not exposed to heat, chemicals, or sharp objects. If the supply cord is damaged, it must be replaced by the manufacturer, service agent, or a similarly qualified person to avoid a hazard. The power supply cord connection MUST be installed in a way that allows easy access in case of emergency.
Motor Features
- Roof and wall mounting with IPX4 weather protection.
- Patented anti-water intrusion system.
- Super quiet, long vane, backward curved centrifugal fan.
- Airflow depends on installation and ducting used. With a single 200mm SteelFlex™ duct, airflow up to 900m³/hr can be achieved, depending on installation. Using ducting smaller than 200mm will result in reduced airflow.
- Simple installation: The motor mounts onto a 150mm PVC pipe for strength and easy Dektite roof sealing.
- Industrial quality motor and fan made in Germany, rated for 40,000 hours.
- High efficiency PSC motor rated at 57W.
- 10-YEAR WARRANTY: Return to manufacturer. Covers faulty manufacturing or components; does not cover normal wear and tear, chemical, or storm damage. (Refer to warranty card for details).
General Notes on Installation and Use
This guide is for the installation of the motor used in Isodrive systems after the canopy/rangehood or bathroom extraction grill has been mounted. All PVC pipe and SteelFlex™ ducting measurements refer to inside measurements unless otherwise stated. The fan unit is designed for installation using a 150mm (ISD) PVC pipe as the initial connection duct, supplied with a 150mm (ISD) PVC pipe to 200mm SteelFlex™ duct bell-mouth adaptor. This fan is suitable for ducting runs with a minimum inlet area of 22,000mm² and a length up to 8 metres maximum. SteelFlex™ ducting must be extended sufficiently to provide a smooth air passage with bends having a radius at least twice the duct diameter. Excessive bends will compromise extraction.
WARNING: The rangehood must not be ducted into a wall cavity or ceiling space where grease can accumulate, posing a fire risk. This will void your warranty.
NOTE: Fan module and SteelFlex™ duct are acoustically matched. Using semi-rigid or rigid ducting will increase noise and may void the warranty. Refer to installation notes on 'Why Schweigen SteelFlex™ Safety Duct'.
Recommended Installation Distance
For the Isodrive 900 motor, a recommended 4 metres of SteelFlex™ ducting with at least two bends is advised. Installing closer may result in higher noise levels. The maximum duct length is 8 metres. Check with your supplier if a longer duct length is required. Do not reduce the duct size at any time and avoid sharp bends.
Minimum Mounting Height
This fan unit is intended for mounting at a minimum height of 2.1 metres (measured to the lower part of the fan impeller) above the floor.
Avoidance of Back Flow
Care should be taken to avoid the backflow of gases into the room from open flues of gas or other open fire appliances.
Safety of Children
This fan is not intended for use by young children or infirm persons without supervision.
Replacement of Supply Cord
If the supply cord is damaged, it must be replaced by a service agent or suitably qualified person to avoid a hazard.
Why Schweigen SteelFlex™ Safety Duct
Schweigen SteelFlex™ is an ultra-strong, flexible, high-performance safety ducting made of Shirikon Firemesh®, a tri-layer tear-resistant UV-treated sleeve. Developed by Schweigen, the Silent Rangehood specialists, it facilitates quiet and efficient high-volume transfers of temperature-sensitive air. Engineered for health and safety, SteelFlex™ is antimicrobial treated, thermally insulated, and acoustically dampened. It is fireproof, pest-proof, and crush-proof, with a treated surface that prevents grease and bacteria build-up. Schweigen's unique Isodrive system pulls air through the hood and acoustically matched ducting, producing near-silent high-volume flow. Using rigid or semi-rigid ducting can create an 'organ piping' effect, amplifying noise. The Isodrive system directs noise outside the house.
WARNING: Installation without the minimum recommended length of acoustically matched SteelFlex™ will void performance expectations. Report any installation problems to Schweigen; call-outs for incorrect installation will incur a service fee. Schweigen is not responsible for problems caused by faulty installation, which may void warranty. An experienced installer list is available on the Schweigen website (www.schweigen.com.au) or by calling 1300 881 693.
Description
Isodrive Motor
Included in the box:
- 1. Isodrive 900 motor (approx. 280W x 200H mm) with approx. 3-metre, 10amp cable and standard plug.
- 2. Fire-resistant 150mm (160mm outside dimension) PVC riser pipe.
- 3. SteelFlex™ safety ducting, approx. 4 metres, 200mm (210mm outside dimension) diameter.
- 4. Bell-mouth adapter ring (200mm duct to 150mm riser).
- 5. 2 x Steel ring clamps (for attaching ducting to rangehood and motor).
- 6. 6 x 20mm self-drilling button head screws.
Not included in the box:
- Roof seal kit / Dektite.
- Support straps for poly pipe connecting to the roof truss.
- Aluminium foil tape.
- Wall Cover Plate (wall mount only) – optional (Part number P1108).
- Mounting Flange (wall mount only) – optional (Part number P40113MF).
- Backdraft Shutter – optional (Part number 200MMBDSSBUILD).
Diagram Description (Page 7): An exploded view diagram shows the components of the Isodrive 900 motor system, including the motor housing, fan, various pipes, adapters, clamps, and screws, with numbered labels corresponding to the parts list.
Installation
Roof Installation
Recommended duct length: 900 motor – minimum 4 metres.
Mount the 150mm (ISD) rigid PVC pipe securely to beams, trusses, or other appropriate structures. The pipe should be mounted vertically, with the roof penetration sealed using a Dektite or similar device. Ensure the PVC pipe protrudes a minimum of 50mm past the top of the Dektite, and that the fan assembly clears the roof cladding at the upper edge. Pass the power cord and plug through the mounting flange and pipe, then out the slotted PVC pipe for connection to the socket from the canopy/rangehood. Do not insert the plug into the socket outlet or switch on until installation is complete. Fit the fan module to the pipe and secure it using the side locking screw. Certain external installation configurations may cause audible noise from the expelled air. To minimize external noise, use between 4 to 8 metres of SteelFlex™ duct to position the Isodrive motor appropriately. The 900 motor is capable of expelling air at 900m³/hr. For environmental noise limits, contact your local Council. An experienced installer list is available on the Schweigen website. Do not install the SteelFlex™ in a straight line; a minimum of two gentle bends in the ducts is required.
Diagram Description (Page 9 - Figure 1: Roof mount option): This diagram illustrates the roof installation of the Isodrive 900 motor. It shows the motor unit connected via a 150mm PVC pipe and a bell-mouth adapter to 200mm SteelFlex™ ducting. The pipe passes through a Dektite seal on the roof, with a 50mm protrusion above it. The diagram labels the motor, optional backdraft shutter, power cord, PVC pipe, Dektite, and connections. Notes advise preventing cord bunching and specify a minimum ducting length of 4 metres.
Wall Installation
This installation type is similar to roof mounting. Ensure the pipe extends at least 50mm past the wall surface. If the pipe length is shortened, reproduce the power cord exit slot on the inside of the wall. NOTE: Decreasing the length of the SteelFlex™ duct will increase airflow and noise levels, potentially causing audible air movement.
Diagram Description (Page 10 - Figure 2: Wall installation): This diagram shows a wall installation setup. The 150mm PVC pipe extends through a wall, with the 900 motor attached. It details the pipe protrusion (50mm), locking screws, and sealing with silicone or urethane. An optional wall cover plate and mounting flange are indicated. The power cord connection to a 240V supply is also shown.
Diagram Description (Page 11 - Figure 3: Wall mount option): Two diagrams illustrate wall mounting. The top shows the motor, optional backdraft shutter, bell-mouth adapter, and SteelFlex™ ducting connected to a 150mm PVC pipe passing through a wall, highlighting locking holes and cord slots. The bottom diagram shows the fan module being fixed with a side locking screw. Notes cover cord routing and preventing bunching.
Flat Roof Installation
Flat roof mounting uses an optional mounting flange. Ensure locking screws are engaged. Seal holes in the stepped surface and between the mounting flange and cover. Up-stand and capping are used. The power supply cord passes through pipe slots. The PVC pipe is cut to length and the ducting end reslotted, ensuring fan end locking holes remain.
Diagram Description (Page 12 - Figure 4: Flat roof installation): This diagram depicts a flat roof installation. The 900 motor is mounted above the roof cladding using an optional mounting flange. It connects via a 150mm PVC pipe and 200mm SteelFlex™ ducting. The diagram shows sealing points, the Dektite, and the pipe protrusion above the mounting flange.
Through Wall Installation for Isodrive 900
The fan unit and optional shutter assembly connect to a pipe that protrudes from the wall. An optional wall cover plate with a bottom notch is used. Ensure the power cable passes through the cover plate's notched recess and is clear of cut edges. The power cord exits via a slot in the pipe at the bottom (6 o'clock position).
Diagram Description (Page 13 - Figure 5: Wall installation): This diagram illustrates a through-wall installation. It shows the fan unit and optional shutter assembly connected to a pipe protruding from a wall. An optional wall cover plate with a bottom notch is shown, along with the power cord passing through the cover plate's recess and a slot in the pipe.
Fan Unit Shutter Assembly for Isodrive 900 (Optional)
- Assemble by fitting the shutter assembly into the fan inlet shroud moulding, ensuring attaching screws align with holes. Alignment can be checked by folding in shutter flaps.
- Fully tighten both screws and re-check fitment into holes.
- Fit the assembly to the duct pipe as per supplied installation instructions.
Diagram Description (Page 14 - Figure 6: Shutter assembly): This diagram shows the fan unit shutter assembly, illustrating how the shutter assembly fits into the fan inlet shroud moulding with attaching screws and holes.
Measurements
Measurements for Isodrive 900
Diagram Description (Page 15 - Figure 7: Measurements for Isodrive 900): This diagram provides key dimensions for the Isodrive 900 unit and its installation. It shows measurements for height (e.g., 198mm, 242mm, 515mm), width (e.g., 160mm, 270mm), and protrusion (50mm). The diagram includes the Dektite and an optional backdraft shutter.
SteelFlex™ Safety Duct
SteelFlex™ Safety Ducting
SteelFlex™ safety ducting must be fully extended and cut to the required length during installation. Maximum fan performance is achieved only when the ducting is fully extended. Failure to fully extend the ducting results in a smaller air passage and lower airflows. Incorrect installation can reduce airflow or increase noise levels. Call-outs for incorrect installation will incur a service fee. Schweigen is not responsible for problems caused by faulty installation. An experienced installer list is available on the Schweigen website (www.schweigen.com.au).
NOTE: In shallow roof spaces, extend SteelFlex™ ducting horizontally. Keep the SteelFlex™ ducting taut, approximately 4 metres in length, with two gentle bends.
Diagram Description (Page 16 - Figure 8: SteelFlex™ Safety Ducting): This diagram illustrates the SteelFlex™ ducting installation with the 900 motor. It shows the flexible ducting run, emphasizing the need to keep it taut and use gentle bends. A note suggests horizontal extension in shallow roof spaces.
Assembling SteelFlex™ Safety Duct
SteelFlex™ safety duct must be secured to either the bell-mouth adapter ring or a 200mm mounting pipe.
Parts required:
- SteelFlex™ safety ducting
- Steel ring clamp
- Bell-mouth adapter ring (200mm duct to 150mm riser)
- 150mm PVC riser pipe
- 20mm self-drilling button head screws
Assembly steps:
- Slide the steel ring clamp over the end of the duct, then insert the bell-mouth adapter ring into the duct end.
- Secure the duct to the bell-mouth adapter at regular intervals with 4 x 20mm button head screws.
- Slide the steel ring clamp back up and tighten to secure the bell-mouth adapter and the duct.
- Attach the mounting pipe to the bell-mouth adapter and secure with 1 x 20mm button head screw.
NOTE: Do not use duct tape to fasten the duct; the screws and hose clamp are adequate.
Diagram Description (Page 17 - Figure 9: Duct assembling): This series of diagrams shows the steps for assembling the SteelFlex™ ducting. It illustrates sliding a steel ring clamp, inserting the bell-mouth adapter, securing with screws, and attaching the mounting pipe.
Shallow Roof Space
In shallow roof spaces, do not crush or kink SteelFlex™ ducting, as this will severely reduce airflow. A 90-degree curve made of PVC or galvanise can be used as a substitute for the bend.
Diagram Description (Page 18 - Figure 10: Shallow roof space): Compares correct and incorrect ducting in shallow roof spaces. The correct method shows a 90-degree PVC or galvanise curve, while the incorrect shows a crushed or kinked SteelFlex™ duct.
Important Note
Please do not crush or kink SteelFlex™ ducting, as it will reduce airflow and may cause noise. Ducting needs to be kept taut at all times.
Diagram Description (Page 18 - Figure 11: SteelFlex™ duct recommended installation): Shows correct (taut, smooth curve) and incorrect (kinked, crushed) installation of SteelFlex™ ducting.
Securing SteelFlex™ Safety Duct
SteelFlex™ safety duct must be installed with supports at maximum intervals of 1.5 metres. Supports can be good quality gaffer or aluminium foil tape, provided they do not restrict the internal diameter of the ducting. Ducting installed looped over hanging beams should have gradual changes in direction. Support using hangers may be required.
NOTE: Ducting should be kept taut at all times.
Diagram Description (Page 19 - Figure 12: Securing SteelFlex™ Safety Duct): Illustrates two support options: Option 1 shows securing the duct to a beam with aluminium foil tape. Option 2 shows supporting the duct with hangers, with a note to minimize sagging.
Parts List
Parts List for Isodrive 900
Diagram Description (Page 20): An exploded view diagram of the Isodrive 900 motor shows all components numbered for reference in the parts list table.
| Number | Part Number | Description | Quantity |
|---|---|---|---|
| 1 | P40100 | Terminal Block Cover | 1 |
| 2 | P40121 | Wire Insulator Cap | 1 |
| 3 | P1061 | O Ring 4¼" ID | 1 |
| 4 | P1059 | Capacitor 2µF | 1 |
| 5 | P807 | Terminal Block | 1 |
| 6 | P40102 | Fan Plate - Motor Mount | 1 |
| 8 | P40122 | 900 Inlet Shroud Mount | 1 |
| 9 | P1069 | 150mm Slotted Pipe | 1 |
| 10 | P40114 | Bell Mouth Adaptor | 1 |
| 11 | P40101 | Fan Shroud | 1 |
| 12 | P301 | Power Cable | 1 |
Maintenance
Roof Restoration or Cleaning
Before performing roof restoration or cleaning, completely cover the outside motor system and avoid all chemical contact.
IMPORTANT: Any damages caused by the use of chemical products are not covered by warranty.
Diagram Description (Page 22 - Figure 13: Avoid chemical contact to motor system): A diagram shows a roof with a motor system, featuring a warning symbol (⚠) indicating the need to avoid chemical contact with the motor during roof work.
Warranty / Disclaimer
Warranty
The Isodrive motor has a 10-Year replacement product warranty. The consumer is responsible for any charges associated with the removal of a faulty unit and the installation of a new unit, including freight charges. Schweigen SteelFlex™ comes with a Lifetime Warranty. *Terms and conditions apply.
Disclaimer
Under our policy of continuous product development, product specifications may change without notice. Prospective purchasers should check with the retailer to ensure this publication correctly describes the products offered for sale. All information is supplied for general reference purposes only, and Schweigen Home Appliances will not be liable for any loss, liability, or damage of any kind arising from reliance upon this information. All pictures used in this guide are for illustrative purposes only.
Contact Information
Australia
Unit 4/1-5 Lake Drive, Dingley Village, Victoria 3172.
Phone: 1300 881 693
Email: sales@schweigen.com.au
Web: www.schweigen.com.au
New Zealand
5 Tolich Place, Henderson, Auckland 0610.
Phone: 0800 200 510
Email: info.parex@emerson.com
Web: www.parex.co.nz
SCHWEIGEN Silent Rangehoods
