Bradford Hurricane 900 CR Cyclonic Industrial Ventilator Instruction Manual

Bradford Hurricane 900 CR Cyclonic Industrial Ventilator

Specifications

• Product: Cyclonic Industrial Ventilator

• Make-up air per ventilator: 100% open, evenly distributed open area*

• Allowable Roof Pitch: Hurricane 900 CR

• Performance values are based on a 5Pa pressure loss across the make-up air opening. Additional make-up air can be provided as per the recommendations in AS1668.2.

Product Usage Instructions

Installation Requirements:
Before starting the installation process, please ensure that the following requirements are met:

• The allowable roof pitch is suitable for the Hurricane 900 CR ventilator
• The make-up air requirement of 100% open, evenly distributed open area can be met
• If additional make-up air is needed, refer to the recommendations in AS1668.2
• Do not proceed with the installation if the above requirements are not met

Ventilator Head:
The Cyclonic Industrial Ventilator comes with a Varipitch head.

Additional Materials Required (Not Supplied):
You will need the following fasteners and materials for the installation:

• Head to Varipitch: 12 Fasteners – 6-4 SS (stainless steel) blind rivets
• Varipitch to Flashing: 12 Fasteners – 6-4 SS (stainless steel) blind rivets
• Flashing to Roof: 34 Fasteners – 14G Class 3/4 Tek screws with neoprene washers
• Straps to Varipitch/Throat: 24 Fasteners – 6-4 SS (stainless steel) blind rivets
• Straps to Purlin: 12 screws & 24 nuts – M8 hex head screws and nuts (minimum class 4.6)

Lifting the Product:
When lifting the Cyclonic Industrial Ventilator, follow these guidelines:

• Lift the product in its original packaging using a crane or similar equipment to the roof mounting location
• Place the product on a soft/smooth surface (e.g., cardboard or a soft-foam mat) to prevent scratching or deformation of the ventilator top surface/dome

Safety and Warnings:
Before installing the product, take note of the following safety precautions and warnings:

• The installation involves working at heights on a sloping surface, which can be dangerous and may result in death, personal injury, or property damage
• Follow the state or territory regulator OH&S guidelines for working at heights and electrical work

Limitations:
The Cyclonic Industrial Ventilator is not suitable for use in cyclonic region D and BAL zones. Compliance with this installation guide is necessary for proper functioning.

Product Suitability:
Always check the product suitability and limitations of use before selecting and purchasing. Refer to the Product Technical Statement (PTS) available online for detailed information.

Installation Under the Ridge:
Follow these steps to install the ventilator under the ridge:

Set Position:

• Place the base flashing under the ridge cap at the desired position
• Adjust the position to avoid structural roof members below the roof sheet
• Ensure the flashing covers the corrugation or ribs equally on each side
• Mark a circle on the roof using the hole in the flashing as a template

Note: Purlins or trimmers are required to secure all four sides of the flashing. Do not cover the ventilator opening.

Cut Hole:
Carefully cut the hole, considering possible insulation and other roof members under the roof sheet. After cutting the hole, fold up the edge of the corrugations or pans. Ensure the integrity of the roofing safety mesh/net is maintained after installation.

Secure Flashing:
Attach the flashing under the ridge cap and apply sealant before final fixing. If trimmers are used, ensure the flashing is secured to them. Seal all fasteners with a suitable sealant to ensure weatherproofing.

FAQ:

• Q: What are the allowable roof pitch and make-up air requirements for the Cyclonic Industrial Ventilator?
  A: The allowable roof pitch is suitable for Hurricane 900 CR, and the make-up air requirement is 100% open, evenly distributed open area.

• Q: Can additional make-up air be provided?
  A: Yes, additional make-up air can be provided as per the recommendations in AS1668.2.

• Q: What materials and fasteners are required for the installation?
  A: The required materials and fasteners are listed in the user manual. Please refer to the “Additional Materials Required” section for detailed information.

• Q: Is the Cyclonic Industrial Ventilator suitable for use in cyclonic region D and BAL zones?
  A: No, the ventilator is not suitable for use in cyclonic region D and BAL zones. Please refer to the “Limitations” section for more information.

Cyclonic Industrial Ventilator Installation Instructions Hurricane® Cyclonic Rated (CR)

SYSTEM PRE-REQUISITES

Check Before Commencing
Before attempting to start the installation, please ensure that the following allowable roof pitch and make-up air requirements can be met.

Product| Make-up air* per ventilator – 100% open, evenly distributed open area| Allowable Roof Pitch
---|---|---
Hurricane 900 CR| ≥ 0.9m²| up to 5°

• Performance values are based on a 5Pa pressure loss across the make-up air opening.

  • Additional make-up air can be provided as per the recommendations in AS1668.2.
  • DO NOT PROCEED TO INSTALL THIS PRODUCT IF THE ABOVE REQUIREMENTS ARE NOT MET.

PACKING LIST (for a standard complete product)

Check Before Commencing Included Parts Additional Materials Required – Not Supplied

FASTENERS (Quantity and Type)

| Head to Varipitch| Varipitch to Flashing| Flashing to Roof| Straps to Varipitch/ Throat| Straps to Purlin
---|---|---|---|---|---
Number of Fasteners| 12| 12| 34| 24| 12 screws & 24 nuts
Fasteners Type| 6-4 SS (stainless steel) blind rivets| 6-4 SS (stainless steel) blind rivets| 14G Class 3/4 Tek screws with Neoprene Washer| 6-4 SS (stainless steel) blind rivets| M8 hex head screws and nuts (minimum class 4.6)

IMPORTANT: Note regarding lifting this product
Lift the product in its original packaging using a crane or similar equipment to the roof mounting location, prior to handling the product.

Caution During Lifting:
The ventilator top surface/dome can be easily scratched or deformed when placed upside down so always place it on a soft/smooth surface such as cardboard or a soft-foam mat.

SAFETY AND WARNINGS

1. The installation of this product involves working at heights on a sloping surface and may be dangerous, including the potential of death, personal injury, or property damage.
2. Follow the state or territory regulator OH&S guidelines for working at heights, electrical, working in elevated temperatures (e.g. roof space in summer). For more information on your State OH&S guidelines for working at heights, please refer to: https://www.safeworkaustralia.gov.au/heights
3. All ventilation products must be installed by a qualified installer and all electrical wiring (where applicable) must be undertaken by a qualified electrician.
4. Due to the size and weight of the turbine, it is recommended that it is always lifted by 2 people or a crane. Refer to the lifting instructions.
5. Damaged parts must be replaced with a genuine replacement part from CSR Bradford Ventilation.
6. The turbine head of this product can rotate without warning (even during installation) – always keep body parts away from moving components.
7. Please read this manual carefully before installing this product and keep it for future reference or provide it to the building owner/maintenance manager.

LIMITATIONS

• Not suitable for use in cyclonic region D and BAL zones.
• Compliance of this product is dependent upon adherence to this installation guide.

PRODUCT SUITABILITY
Always check product suitability & limitations of use prior to selection and purchase – refer to the Product Technical Statement (PTS) available online

VENTILATOR POSITIONING AND PROVISION FOR MAKE-UP AIR

• CSR Bradford Ventilation recommends that ventilators are positioned 4m to 6m away from each other in all directions for effective and efficient performance. It is also recommended that ventilators of the same size are used together to prevent replacement air from being drawn between ventilators of different sizes. Ensure that the ventilators are not sheltered from the wind by surrounding objects, the shadow angle created by the roof ridge or by each other.
• Make-up air is required for this ventilator to replenish the exhausted air. As a general guide, the largest make-up air entry should be positioned on the opposite side of the building to the largest ventilator demand. The make-up air location should be positioned at optimum height to provide efficient sweeping of the floor area.
• The illustrations below provide a number of generic ventilator and make-up air layouts but it should be noted that a whole-of-building assessment, as per AS1668.2, should be conducted by a suitably qualified person prior to deciding upon site-specific ventilator and make-up air placement.

IMPORTANT: If external make-up air is insufficient, the ventilators will draw make-up air from each other – this will both diminish the effectiveness of the system and increase the risk of the system drawing external water into the building during periods of rain. It is also recommended that ventilators of the same size are used together to prevent replacement air from being drawn between ventilators of different sizes.

INSTALLATION UNDER THE RIDGE

• Set Position: Place the base flashing under the ridge cap at the required position and adjust the position to avoid structural roof members below the roof sheet. Ensure the flashing covers the corrugation or ribs equally on each side of the flashing, then mark a circle on the roof using the hole in the flashing as a template.

Important Note

• Regarding Roof Structural Support:
  Purlins or trimmers are required to secure all 4 sides of the flashing. Do not cover the ventilator opening.

• Cut Hole: Carefully cut the hole, remembering that there may be insulation and other roof members under the roof sheet. Once the hole has been cut, fold up the edge of the corrugations or pans. Ensure the roofing safety mesh/net integrity is maintained after the installation.

• Secure Flashing: Attach the flashing under the ridge cap and apply sealant prior to final fixing (refer to the table below for the required number of fasteners). If trimmers are used ensure the flashing is secured to the trimmers. Seal all fasteners with a suitable sealant to ensure they are weatherproof.

  • Fasteners to secure flashing to roof: Use 34 off 14G Class 3/4 Tek screws with Neoprene Washer
  • 26 around the flashing perimeter
  • 8 near the throat

• Assemble the Varipitch: When a Varipitch throat is being used, position the Varipitch on the flashing and rotate the top and bottom halves until the top of the Varipitch is level (horizontal) -it is recommended that an electronic or spirit level is used to ensure that the top edge of the throat is horizontal in all directions.

• Secure the Varipitch Angle: With the Varipitch upper throat positioned horizontally, lock it into position using the supplied Varipitch clip. Use either self-tapping screws or blind rivets to secure all the clips between the two halves of the Varipitch.

• Weather Sealing: Seal the Varipitch seam on the inside with a bead of weather-resistant suitable sealant.  NOTE: DO NOT apply sealant to the joint between the Flashing and Varipitch. This is a natural gutter to release any trapped condensation. See details in section (s) below.

• Secure Varipitch to Flashing: Reposition the Varipitch on the Flashing and check it is horizontal – secure the Varipitch to the flashing using the recommended number of screws shown in the table below – DO NOT SEAL this connection.

  • Fasteners to secure varipitch to flashing : Use 12 off 6-4 SS (stainless steel) blind rivets

• Rivet the cyclone strap to position 1 to secure the Cyclone Strap (1m) with the varipitch. Note the strap should be placed inside the varipitch.

  • Repeat this for all the 4 straps.
  • These 4 cyclone straps must be spaced evenly apart at each quadrant of the varipitch.

• Rivet the cyclone strap at position 2, 3 and 4. Rivet 2 is positioned 50mm above the flashing and Rivet 3 is 150mm from the top of the varipitch.

  • Rivet 4 positioned in between 2 and 3. Adjust the rivet hole position if it’s interfering with the varipitch seam.
  • Repeat the same for the remaining 3 straps.

• Rivets arrangement of one strap from inside and outside the vents respectively. Seal the rivet with a suitable sealant.

• Fix the lower end of the 4 straps to the purlin/trimmer with M8 hex head screws (minimum class 4.6) and use two M8 nuts per screw to securely lock.

• Thread the Eye Nut Cyclone Strap (2m) through the eye nut. Attach one end of the strap to the purlin/trimmer with 2 x M8 hex head screws (minimum class 4.6) and two M8 nuts per screw. Then pull the other end of the strap to ensure it is fully tightened before fixing it onto the opposite purlin/trimmer with 2x M8 hex head screws (minimum class 4.6) and use two M8 nuts per screw to securely lock.

• Assemble Turbine: Assemble the turbine head to the Varipitch. Re-check if the assembly is level (horizontal) and adjust the turbine by tilting the throat slightly if required. Ensure the knurling (the tapered section of the Varipitch) is fully inside the ventilator throat and secure the ventilator throat by fastening it to the top of the Varipitch with the number of fasteners shown in the table below.

  • Fasteners to secure varipitch to flashing : Use 12 off 6-4 SS (stainless steel) blind rivets
  • NOTE: DO NOT apply sealant to the joint between the turbine and Varipitch. This is a natural gutter to release any trapped condensation. See details in section (s) below.

• Rivet the cyclone strap at position 5 located 40 mm from the bottom of turbine head. Rivet 1 will not be visible, and it is approximately 10mm above Rivet 5.

• Rivet the cyclone strap at position 6 located 80 mm from the bottom of turbine head.

• Final rivet arrangement for one strap.

• Repeat steps I & II from section k above for the remaining 3 cyclonic straps to complete the final assembly.

• Complete assembly with cyclone straps

• Sealing is crucial for this product to ensure no leaking occurs during its lifespan, but there is also a requirement for drainage. To ensure that only the required areas are sealed and the drainage path is left open, follow this guide carefully:

MAINTENANCE

Regular maintenance of this product is essential to ensure its safe and long- term operation. It is the responsibility of the building owner or manager to outline the maintenance program throughout the product’s lifespan. The following components should be inspected on a regular basis:

WARNING: Prior to inspecting the ventilator ensure that the power is turned off and that the ventilator head is held in a static position by another person using a gloved hand on the top surface of the turbine (away from the turbine blades) – this should not be undertaken on a windy day when the turbine head cannot be safely slowed.

• Cyclone straps – check all straps are in situ and assess visual wear and tear.
• Rotating/turbine head – check for excessive movement/contact between components, unusual noise during rotation, listen for noises and assess visual wear & tear.
• Fasteners – check all are in situ and well-sealed.
• Flashing Connections – check joints that are meant to be sealed remain sealed and that those that are meant to be unsealed are clear of obstruction.
• Pestguard (if provided) – ensure this is clear of debris.

TROUBLESHOOTING GUIDE

• Issue: Water or rain leakage
• Potential Cause: Varipitch connection not sealed
• Action: Seal Varipitch connection with flexible, weatherproof sealant.
• Additional Information: The photo in the sidebar shows the possible outcome if the Varipitch connection has been slightly separated during angle adjustment or has not been sealed.

|
2|

• Issue: Water or rain leakage
• Potential Cause: Ventilator throat gutter blocked.
• Action: Remove blockage – refer drainage diagram in these instructions
• Additional Information: Placing sealant around the bottom of the vent throat where it contacts the flashing blocks the vent gutter at the base of the throat, preventing the release of internal condensation and mist from the inside of the throat.

|
3|

• Issue: Water or rain leakage
• Potential Cause: Insufficient turndowns along the front edge of the back-flashing due to low roof pitch and driving rain.
• Action: Extend turndown or re-flash

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4|

• Issue: Water or rain leakage
• Potential Cause: No back-flashing provided
• Action: Extend back-flashing to under sheet above or roof ridge cap

|
5|

• Issue: Water or rain leakage
• Potential Cause : Ventilator throat shortened or not used which allows rain ‘bounce’ to drive water off roof into ventilator
• Action: Install recommended ventilator throat

|
6|

• Issue: Condensation Drip (after hours) for ventilator with damper.
• Potential Cause: Inadequate make-up air after hours.
• Action: Set the damper to an open position to allow air movement during inactive hours where make-up air could not be provided via open windows shutter or louvres.

7| Reliance upon flexible sealants.
Through expansion and contraction of building components over time, flexible sealants such as silicon may develop cavities or cracks which then permit water ingress. It is always recommended that mechanically overlapped seals are created with metal components to provide water protection and that flexible sealants are used to provide secondary protection. While it is recommended that silicon be applied over roofing screws – it is more reliable to use high quality blind rivets or roofing screws with integrated washers.
8| Failure to Use Ventilator Throat.
It is crucial that the ventilators are installed with a Varipitch to ensure the turbine has adequate clearance from the flashing. Failure to comply with this recommendation could lead to rain ingress through the vanes resulting in leakage.
9| Creation of Negative Pressure in a Building Leading to Back-drafting.

• The demand for make-up air by ventilators can lead to the creation of sufficient negative pressure in the building that some vents which are working less efficiently can be forced to supply air to the other vents in order to equalise pressure. During wet weather, this can lead to rain being inadvertently drawn into the building via the ventilators and giving the appearance of a leak.
• The characteristics of this phenomenon occur when:
  • The building is very air-tight and make-up air is not balanced.
  • Vents are located at different levels on the roof with the majority adjacent to the ridge and a lesser number down slope.
• The ventilators located at the higher levels create pressure and draw air through the ventilators at the lower levels due to greater stack effect (ΔT x building height) plus clearer access to wind.
• This issue can be addressed by installing louvres or low-level static vents to assist in balancing the air pressure.

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10| Understanding and Managing Condensation

• Ventilators with dampers which are unable to allow the warm humid air to escape through the ventilator may be at risk of condensation. This is due to the damper becoming the interface between warm and cool environments, which causes dew point to be reached and condensation to occur on the damper. This may lead to condensation dripping inside the building.
• Building designers need to consider the condensation risk when selecting products with dampers as there are no preventive measures available to minimise the occurrence other than opening the damper to reduce the temperature differential.

The contents of this install guide are copyright protected and may not be reproduced in any form without prior written consent of CSR. Recommendations and advice regarding the use of the products described in this guide are to be taken as a guide only, and are given without liability on the part of the company or its employees. We reserve the right to change product specifications without prior notification, please refer to the CSR website for the latest version of this document. The purchaser should independently determine the suitability of the product for the intended use and application.

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