MaxxFan Deluxe:
Installation Guide
Professional guidelines for a perfect 400x400 roof cut. Positioning, structural reinforcement, and leak-prevention tactics.
Preparation & Layout
The MaxxFan Deluxe requires a standard **400mm x 400mm** hole. However, the footprint of the lid is larger. You must ensure you have at least 200mm of flat roof space behind the hole to allow the lid to retract.
Cutting the Roof
1. Mark your 400x400 square from the inside first to check for structural ribs.
2. Drill 10mm pilot holes in each corner.
3. Use a jigsaw with a high-quality metal blade. Tape the roof extensively to prevent the jigsaw baseplate from scratching your paint.
**Crucial:** Apply anti-rust primer to the raw metal edges immediately after cutting and filing. Rust starts within hours on bare steel.
Sealing & Bonding
Do not use standard silicone. Use a high-quality butyl sealant like **SikaLastomer 710**. Butyl remains flexible forever, allowing for the natural expansion and contraction of the van roof.
Apply a continuous bead to the underside of the fan flange, drop it into place, and secure using the provided screws. Wipe away any excess and finish with a bead of **Sikaflex 522** around the external edge for a secondary waterproof barrier.
Electrical Wiring
The MaxxFan Deluxe is a 12V DC appliance. It should be wired to your leisure battery via a **5A or 10A fuse**.
Use 1.5mm² or 2.5mm² cable. If your run is longer than 5 metres, use 2.5mm² to minimize voltage drop, which can cause the fan's control board to act erratically.