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Maintenance Method
Model No. UTZ-BX025A/UTZ-BX035A/UTZ-BX050A
■ Stop the operation and switch the exclusive breaker "OFF".
■ Cleaning the filter (When required)
1) Enter the ceiling from the Inspection Opening for the Heat Energy
Recovery, and remove the screw on the inspection cover.
2) Holding the Inspection Cover, turn two pieces of knob for 90° and
remove the cover.
3) There is a filter below the Heat Exchange Element at two places,
respectively. Pull it toward you.
4) Either lightly strike the removed filter with your hand or vacuum it
with a vacuum cleaner to remove the dirt. If it is very dirty, swish it
back and forth in a solution of lukewarm water and dish-washing
(neutral) detergent.
5) Install the filter after thoroughly allowing it to dry naturally.
Caution
Avoid using heat to dry the filter, as this may cause changes in the shape
or quality of the filter.
■ Whenever the filter was damaged, order the sales shop or the
engineering office. (Separately sold)
■ Cleaning the Heat Exchange Element (If you find it too much stained,
clean it.)
1) Remove the filters.
2) Remove the two Heat Exchange Elements from the unit. (Model No.
UTZ-BX025A has one Heat Exchange Element.)
Caution
● The weight of the Heat Exchange Element is as shown in the table
below.
Hold it firmly to ensure that you do not drop it.
Model No.
Weight (kg /piece) Pieces to be used
UTZ-BX025A
UTZ-BX035A
UTZ-BX050A
4
4.5
1
3.4
2
3.7
2
Knob Position
When installed
To remove
(Closed)
(Open)
Heat Exchange Element
Hook
Inspection Cover
Hook
Inspection Cover
Filter
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