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Anti-moisture measure
Ventilation must be provided to prevent moisture from being drawn into the enclosure during
atmospheric pressure changes and to allow trapped humid air to escape. Two vent holes are
provided on the unit, one at the rear and one at the bottom. A vent tube is mounted at the
position (A) shown below. For horizontal installation, remove the vent tube from (A) and fix it to
(B). Cover the hole of (A) with the blind seal (supplied), from inside the coupler. For ceiling
mount, make a hole (Φ8.5) on the front panel and mount the vent tube. These measures should
be done before mounting the unit.
(For horizontal mounting)