Centaur Retrofit Kit

For retrofiting current control modes to Pre May '99 SmokeShield and VentShield Dampers


Overview

The Centaur retrofit kit is designed for facilitate the use of the current generation range of modes on SmokeShield and VentShield dampers manufactured prior to May 1999. It achieves this by converting the rotary operation of the current modes into the linear action required by these dampers.

Due to the older mode being a more powerful linear spring release, a torque test needs to be carried out to check the suitability of your dampers for this upgrade. This is carried out by substituting the Centaur for the current mode to enable a torque test to be carried out of its opening and closing operation to ensure that the torque requirement falls below 12Nm.

If the damper falls outside this parameter it may be due to a very stiff blade operation. In this case then maintenance of the damper may be required after which a repeat torque test should be carried out. It should be noted that this upgrade will not be suitable for dampers that have had this maintenance carried out and still fail the torque. In these cases the mode should be replaced with a replacement old style mode or the entire damper be replaced with a new SmokeShieldTM or VentShield PTCTM . It should be noted the there is a limited supply of the old style mode available and once current stocks have been depleted they will become obsolete and no longer be available.


Retrofit Ordering

In order to replace your existing Mode with the Centaur retrofit kit, you will need to order the following items:

 

If you are unsure about any of this then please do not hesitate to contact us.


Tools Required

The tools required for the installation of the Centaur retrofit kit, damper torque testing, and damper recommissioning are as follows:

  • 3mm Flat Bladed Screwdriver
  • No 2 Philips Screwdriver
  • 14mm Spanner
  • Calibrated Torque Wrench capable of measuring 12Nm
  • 14mm A/F Socket to suit Torque Wrench
  • Battery Operated Drill 
  • Ø3.0mm Drill Bit
  • Ø3.5mm Drill Bit
  • Ø10.0mm Drill Bit
  • Hand Operated Pop Riveter  
  • 5mm Allen Key

Installation for Testing

In order to test if your damper is suitable for this upgrade the following procedure needs to be carried out:

1. Power down the damper mode into the safe position and disconnect the signal and power wiring. XNNN01215 Centaur Retrofit Kit actionair LNNN00392 Rev 1 (3/17) www.swegonair.co.uk Page 4 of 12

2. Remove the two ‘R’ clips from the Ø10mm pivot bar located on the cable outlet side of the mode and one ‘R’ Clip from one end of the front locking bar holding the mode in position.

3. Draw out the locking bar from the Mode mounting baseplate. This will release the front of the Mode.

4. Lift the front of the Mode in order to disengage the drive shaft from the gearbox drive dog. Rotate the Mode about the rear pivot bar to an angle of 90° then slide the Mode across the baseplate to disengage one side of the rear pivot bar.

5. Lift the Mode slightly to ensure that the disengaged part of the pivot bar is clear of the baseplate. Now wriggle the other side of the pivot bar free of its location in the baseplate and place the Mode in a safe location.

6. Pick up the Centaur retrofit kit. Holding it so the label is facing upwards and the hexagon drive shaft is nearest to the bottom of the Mode mounting baseplate, position it within the side walls of the baseplate, then lower it into position taking care to locate the drive link loop over the gearbox drive dog. Now, seat the retrofit kit fully home whilst ensuring that the fixing holes in the side walls are fully aligned.

7. Insert the front locking bar through small holes in the Mode mounting baseplate and the retrofit kit and replace the missing ‘R’ clip.

8. Insert the two clevis pins through the larger holes in the side walls of the retrofit kit so that the drilled holes in the clevis pins are located outside of the baseplate. Secure them in place with the remaining two ‘R’ clips as shown. You are now ready to carry out the torque testing. Torque Testing Process

9. Now that the Centaur retrofit kit has been installed, use the 14mm spanner on the hex shaft of the retrofit kit and operate it in both directions to ensure that the damper is moving freely. If any resistance is found then damper maintenance should be carried out prior to torque testing. Once this has been carried out, return the damper to its fail safe position and you are ready to proceed with the torque testing.

10. Using a calibrated torque wrench and 14mm socket, rotate the hex drive shaft in a clockwise direction in order to open the damper and note the max torque value registered.

11. Now, rotate the hex drive shaft in an anti-clockwise direction to close the damper and note the max torque value registered. Repeat operations 10 and 11 two more times to check the repeatability of the measured results. If the results of the torque testing are lower than 12Nm then the Centaur retrofit kit can be used. However, if the torque values are higher than this value then damper maintenance must be carried out and the torque testing process repeated. If the damper fails this test a second time then the only options open to the user is to replace the old style mode with one of the same type, or the complete replacement of the damper assembly with a new generation SmokeShieldTM or VentShieldTM damper. Note: There is only a limited supply of the old style mode and once current stocks have been depleted they will become obsolete and no longer be available. Retrofit Installation Procedure If have had a successful torque test on the damper, then the retrofit kit needs to be fully installed. This is done by carrying out the following process:

12. Remove the ‘R’ Clips and slide the front locking bar and clevis pins out in order to allow the retrofit kit to be removed from the Mode mounting baseplate. XNNN01215 Centaur Retrofit Kit actionair

13. Lift retrofit kit away from the Mode mounting plate to gain access to the thermal fuse slot in the plate.

14. Take the Seal Plate supplied and lay it over the thermal fuse slot in the Mode baseplate then drill through with the Ø3.5mm drill bit and secure in place using the pop rivets supplied.

15. Pick up the Centaur retrofit kit. Holding it so the label is facing upwards and the hexagon drive shaft is nearest to the bottom of the Mode mounting baseplate, position it within the side walls of the baseplate, then lower it into position taking care to locate the drive link loop over the gearbox drive dog. Now, seat the retrofit kit fully home whilst ensuring that the fixing holes in the side walls are fully aligned.

16. Insert the front locking bar through small holes in the Mode mounting baseplate and the retrofit kit and replace the missing ‘R’ clip.

17. Insert the two clevis pins through the larger holes in the side walls of the retrofit kit so that the drilled holes in the clevis pins are located outside of the baseplate. Secure them in place with the remaining two ‘R’ clips as shown. You are now ready to install the Actuator. Actuator Installation Procedure

18. With the Damper in its failsafe position locate the actuator, face upwards, on the hex drive shaft of the retrofit kit and screw it into place using the M6 socket cap screws and washers supplied. Position the cables in such a manner as to avoid fouling the gearbox drive dog and other moving parts and secure in place.

ETR installation (SmokeShieldTM only)

19. Select a suitable position for the mounting of the Electrical Thermal Release (ETR) through the ductwork wall. Ideally this should be located in the upper half of the ductwork or in the case of ductless installations, the upper part of the spigot, not in the damper shroud. Apply the self-adhesive template supplied and drill the necessary holes using Ø3.0mm and Ø10.0mm drill bits. In the case of the Ø10.0mm drill bit, if this is not available then any size between 9.5mm and 11mm can be used.

20. Insert the ETR probe through the duct wall (figure 1) and ensure that both screws are located in their respective fixing holes. Tighten both screws equally until they are fully home to ensure that both halves of the ETR are pulled together to form a tight seal (figures 2 & 3). This is a product safety feature of the ETR. If the gap between the two halves of the ETR is not fully closed then there will be no electrical contact and the unit will fail to operate. The ETR is pre-wired to the actuator with 0.5m of halogen free low smoke and fume cable. In addition to this, there is a manual test switch is fitted to the top of the ETR to allow periodic operation of the damper simulating actual fail-safe release under smoke and fire conditions without destroying the thermal fuse.

Actuator Wiring Diagrams

Wiring diagrams for the modes can be found below: Mode 4 Motorised opening via a Multiplex Control Panel (MCP). • Power on results in damper opening by motor operation. • Power off results in the damper closing due to spring closure via mechanical fusible link or electrically. For wiring diagram, refer to the documentation supplied with the Mode 4 Outstation. SmokeShieldTM Mode 5 ETR Version (24v System) • Supply on results in damper motor reset. • Supply off results in the damper closing due to spring release or electrical thermal release. • Fitted with an external mechanical position indicator with pointer. • Release time ≈ 22 seconds • Reset time ≈ 60 seconds The 24v Supply must be connected via a safety isolating transformer. SmokeShieldTM Mode 6 ETR Version (230v System) • Power on results in damper motor reset. • Power off results in the damper closing due to spring release or electrical thermal release. • External mechanical position indicator with pointer. • Release time ≈ 22 seconds • Reset time ≈ 60 seconds The main power supply must be isolated with a device which disconnects the phase conductors, resulting in a contact gap of 3mm or more. VentShieldTM Mode 5 Non ETR Version (24v System) • Supply on results in damper motor reset. • Supply off results in the damper closing due to spring release. • Release time ≈ 22 seconds • Reset time ≈ 60 seconds The 24v Supply must be connected via a safety isolating transformer.

VentShieldTM Mode 6 Non ETR Version (230v System) • Power on results in damper motor reset. • Power off results in the damper closing due to spring release. • Release time ≈ 22 seconds • Reset time ≈ 60 seconds The main power supply must be isolated with a device which disconnects the phase conductors, resulting in a contact gap of 3mm or more.

General Notes

Each Actuator is supplied pre-wired with either 1m or 5m (depending on the option you have selected) of halogen free low smoke and fume cable for the convenience of onsite wiring.

This wiring gives the distinct safety advantage of all electrical termination being outside the ductwork, so eliminating any potential in-duct firing hazards from wiring faults. Health and Safety

All wiring should be carried out in accordance with the wiring details provided, the IEE and BS regulations, by a competent person.

Care must be taken when installing this retrofit kit or inspecting the damper, as it may close without warning due to a variety of reasons, especially in the case of losing electrical power, or receiving the fire signal due to temperature rise in the ductwork. This is the products prime function. Do not place any items, fingers, or limbs between the blades.

Troubleshooting

Here is a quick guide to problems that may be encountered. For more detailed actions please refer to the appropriate part of the installation procedure and wiring documentation.

Please note that any modifications made to units will invalidate warranties, etc.

Control mode actuator fails to operate electrically • The ETR is not correctly fitted to the ductwork. • The ETR probe has been damaged. • The Actuator is incorrectly wired. • The ETR cable have been damaged or tampered with. Control mode actuator operates, but with limited or no movement of the damper blades is observed • The actuator is not correctly synchronised with the Centaur retrofit kit. • The damper is damaged or poorly maintained resulting in the torque requirement being over 12Nm. • Actuator not screwed down correctly. • Foreign matter is impeding blade movement.