Vetus Extractor Fans TWINLINE A, B, C, D — Installation Manual

Technical Data

Current at 12.6 V / 25.4 V with 10 m (33 ft) of duct. Maximum ambient temperature 70 degrees C (158 degrees F). Ignition protected motor; conforms to ABYC and Coast Guard Safety Standards. Principal dimensions: A/C 128 (5 1/16") long, B/D 180 (7 1/16") long.

Engine Room Ventilation

• For ventilating the engine room, toilet or galley. Vetus does NOT recommend using it to supply air to the engine: engine suction would overspeed and overheat the fan.
• Engine without its own air inlet: the fan can only ventilate the engine room with the engine stopped. Engine with a separate inlet (grille with plenum chamber): the fan extracts hot air with the engine running or stopped.
• Diesel: air in low, extract high. Petrol: air in high, extract low (below the top of the engine bed, where vapour collects) but not so low it sucks bilge water.
• Make sure openings and fan capacity are large enough, and follow the engine maker's instructions.

Installation and Wiring

• Fit on a bulkhead or floor, well above the bilge water and away from splashes, drips or deck wash water, facing downwards so water drains.
• Use the fan as a template; drill for 4.8 mm (no. 10) screws and tighten evenly.
• Duct: smooth inside, resistant to at least 70º C (158 degrees F), water, oil, fuel and under/over-pressure; internal diameter 76 mm (3") for A / C, 102 mm (4") for B / D. Short, few bends, large radius; screw it on and secure with stainless hose clamps.
• Without a duct, fit a grille over the opening.
• Check the boat voltage matches the fan (12 or 24 Volt). Main switch rated 10 Amps and a medium time lag fuse in the positive cable (value per model in the wiring diagram). Wire at least 1.5 mm2, insulation rated over 70 degrees C.

Operation

• Run the fan at least 4 minutes and check the engine room for vapour before starting the engine.
• NEVER switch the fan on while refuelling.