18 Ventilator
Duct Connection
Duct Connection
• The change of air discharge grill’s location should be examined when the cold draft from air dis-
charge grill is feared. The fan is driving while defrost operation, and the cold air is often blowing.
• After securely connect the duct with the duct connection flange, wrap it with a commercial aluminium
tape so that air cannot be leaked.
• Adjust the duct from the ceiling so that no force is applied to the main body of the ventilation system.
• Always use two ducts at the outdoor with the heat insulating material for prevention of dewing.
Outdoor duct slop
: More than 1/30(toward the wall)
Obtaining of right distance
(preventing penetration of rain water)
• Check that there are no foreign materials
(paper, vinyl, etc) or cutoff powders in the
duct before connecting the duct.
•
Take care so that shock may not be applied
to the damper plate within the main body
when performing the duct connection work.
•
It is recommended to perform adiabatic treat-
ment even to the duct pipe at the indoor side
where ambient temperature is expected when
the main body of the ventilation system for cool-
ing in summer.
•
Take care so that work may not be performed
as in the left figure. Otherwise, it may cause
reduction of air volume or abnormal noise.
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