Operation and Maint.Manual VUD VUF VDF HCD SeriesRev6.doc
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MAINTENANCE
Access to the components is gained by removing the front access panels. Typically, the
panels are fastened by heavy duty Phillips head screws. When removing the access panel
(vertical style units), loosen but do not remove the screws. Carefully store the panel in a
place where it will not get damaged. The horizontal style units utilize hinged access
panels.
CAUTION: Disconnect power before servicing the unit.
The filter access panels have a “kill switch” installed that will shut the supply air fan off once
the panel is removed. This will only disconnect the power to the supply air fans. Be sure to
disconnect ALL power by turning the remote disconnect switch to the off position.
Drain Pan Instruction
• Please check the drain pan for proper drainage as part of commissioning.
• Check to make sure the drain pain overflow switch didn’t come loose or shift during
shipping as part of commissioning.
• The unit should be checked to ensure the drain pan is level, free of debris, and the
drain line properly connected to the riser stub-out.
Frequency maintenance greatly depends on the surrounding conditions (inside and outside
of the building). The following is a typical maintenance schedule for a classroom unit
ventilator.
Every 3 months – Change filters
Every 12 months – Vacuum out drain pans
– Clean strainer in hydronic circuit (if applicable)
Every 24 months – Clean evaporator coil
– Vacuum any loose debris from interior of the unit
– Inspect dampers to ensure that there is a proper seal when closed
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