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Air to Air Heat Exchanger
13
Maintenance
Running the Air to Air Heat Exchanger for a long period
causes the filter or heat exchange element to become
clogged with dust. If the filter or heat exchange element
is clogged, the ventilation amount is reduced and
ventilation effect will be deteriorated.
Clean the filter and heat exchange element regularly
according to the extent of dust accumulation.
WARNING
Before performing maintenance, stop the unit, then
turn off the breaker.
• Otherwise, an electric shock or injury may result.
Do not pour or spray water or detergent on the
electric parts.
• Otherwise, an electrical leakage may occur and a fire
or electric shock may result.
CAUTION
Wear protective gloves when performing
maintenance.
• Otherwise, an injury may result.
Maintenance of the filter and
heat exchange element
◆ Filter maintenance (Clean the filter
once or twice a year.)
2
1
Clean the filter if
is indicated on the
remote controller.
2
Press the
button after cleaning the filter.
The
indicator disappears.
47-EN
Installation Manual
1
Open the inspection cover.
Enter the ceiling cavity remove the screw of fixed
part of Inspection cover and remove the fixing
lever (support the inspection cover while removing
the brackets), then open the inspection cover.
▼ VN-M150 to 1000HE
Fixed part of
Inspection cover
Inspection cover
Fixing lever
▼ VN-M1500 and 2000HE
Inspection cover
2
Pull out the heat exchange elements.
Filters are attached to the heat exchange element.
Hold the handle of the heat exchange element,
then pull it out.
* 2 heat exchange elements are equipped with
this unit. (VN-M150 to 1000HE)
* 4 heat exchange elements are equipped with
1
this unit. (VN-M1500 and 2000HE)
Filters
Air to Air Heat Exchanger
CAUTION
The table below shows the weight of each heat
exchange element. Handle the heat exchange
element carefully so as not to drop it.
Model name
Weight (kg/unit)
VN-M150HE
1.7
VN-M250HE
1.7
VN-M350HE
1.7
VN-M500HE
2.9
VN-M650HE
2.9
VN-M800HE
3.7
VN-M1000HE
3.7
VN-M1500HE
3.7
VN-M2000HE
3.7
3
Remove the filters.
Remove the filters from the frame of the heat
exchange element.
Heat exchange
elements
Filters
4
Clean the filters.
Clean the filters by dusting them or using a
vacuum cleaner. If the filters are badly clogged,
wash them by pressing them down in lukewarm
water with a neutral dish washing liquid.
Vacuum cleaner
(with a brush)
Filters
– 24 –
NOTE
• Do not dry the filter with heat from a flame; otherwise,
deformation or deterioration of the filter may result.
• Light-up hours of the
indicator is set to [2500 H]. If
the filter is badly clogged, change the setting value.
For the details, refer to the "Changing the time before
Quantity
the Filter Sign lights up" on page 20.
2
• Do not soak the filter in water hotter than 60°C;
2
otherwise, deformation or deterioration of the filter
may result.
2
2
2
Maintenance of the heat
2
exchange elements (Clean
2
4
the heat exchange elements
4
once or twice in 2 years.)
1
Clean the heat exchange elements
Remove the dust on the surface of the heat
exchange element using a vacuum cleaner.
Vacuum cleaner
(with a brush)
(Corner)
Do not wash in water
NOTE
• Use a vacuum cleaner with a brush, and stroke the
brush gently on the heat exchange element.
• Do not press the nozzle of the vacuum cleaner hard
against the heat exchange element; otherwise, the
surface of it will be scratched.
• Do not wash the heat exchange element in water.
* Contact the dealer or installer when the heat
exchange element is damaged and replacing it
is necessary.
Installation Manual
Heat exchange
element
EN
48-EN
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