Flexit Nordic UNI Fan Bearing Spare Part Kit Installation Instructions

Important Safety Instructions

⚠️ DANGER!

• Before opening the door, the unit must be disconnected from mains power supply, and the fans must have been given time to stop (min. 3 minutes).
• The unit contains heating elements that must not be touched when they are hot.
• All electrical connections must be carried out by qualified electricians.

Tools and Materials Required

You will need the following tools and materials:

• Pop rivet 3.2x6 mm (UNI 3, 4)
• Bearing SKF 608-2RSH
• Torx T20 Screwdriver
• Circlip pliers, 1 mm tip, for external locking
• Pop rivet pliers
• Knife for lifting cover over bearing
• Chisel or drill for removing rivet bodies from the mandrel.

Note: Mark the position of removed parts (like rivets) to ensure they can be replaced in the same location.

Fan Housing Information

• The fan housing of the Nordic S2/3/4 models is screwed on, so no sealant or adhesive is required.
• Nordic CL models have no housing.
• On UNI 2 and K2.1 models, the fan housing is sealed with sealant and is easy to release.
• On UNI 3 and 4 models, it is easier to cut off the mandrel to remove the fan.

Installation Steps

The following steps detail the process of replacing the fan bearing. Visual aids are described for each step.

Step 1: Loosen and Remove Cover

Visual Aid (Page 7): A hand uses a Torx T20 screwdriver to loosen four screws. Blue circles highlight the screw locations. The electronics unit is then lifted off, followed by the cover over the bearing.

1. Release 4 screws with TX20 screwdriver.
2. Lift off the electronics unit.
3. Detach the loose cover over the bearing.

Step 2: Remove Old Bearing and Stator

Visual Aid (Page 8): Pliers are used to remove a circlip from the shaft (Ø8.0mm, ring thickness 0.75mm). Caution is advised as the ring can be easily damaged. The stator is then lifted out.

4. Remove the circlip. Shaft Ø8.0mm, ring thickness 0.75mm. Be careful here, as it is easy to damage the ring.
5. Lift out the stator.
6. Press the bearing out manually. Note: Only do this manually.

Step 3: Install New Bearing and Reassemble Stator

Visual Aid (Page 9): A new bearing (SKF 608-2RSH, Ø 22mm, Ø 8mm, width 7mm) is inserted onto the shaft. The stator is then replaced in the fan.

7. Insert the new bearing Ø 22mm, Ø 8mm, width 7mm. SKF 608-2RSH.
8. Replace the stator in the fan.
9. Remount the circlip. The stator will need to be pressed down.

Visual Aid (Page 9): Circlip pliers are used to remount the circlip.

Step 4: Reconnect Electronics and Reassemble Housing

Visual Aid (Page 10): The cover is placed back onto the unit. The electronics unit is reinstalled, ensuring its pin aligns with the hole in the stator. The four screws are retightened.

10. Replace the cover.
11. Replace the electronics unit, making sure not to bend the contact pin.
12. The pin in the electronics unit must be inserted in the hole in the stator.
13. Retighten the four screws.
14. Remount the fan in the housing. Use acrylic sealant where this was used before. Pop rivet the mandrel in place where this was removed.

Visual Aid (Page 11): A hand uses a screwdriver to retighten screws, confirming the final assembly step.