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3
Remove the filters.
Remove the filters from the frame of the heat
exchanger element.
High efficiency
Heat exchanger
filter
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
5
Clean the high efficiency filters clean the
filters by using a vacuum cleaner.
High efficiency filters cannot be reused. Change them
at 2500 hours of use.
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.
• Do not soak the filter in water hotter than 60 °C;
otherwise, deformation or deterioration of the filter
may result.
153-EN
Maintenance of the heat
exchanger elements (Clean
the heat exchanger elements
once or twice in 2 years.)
1
Clean the heat exchanger elements
Remove the dust on the surface of the heat
exchanger element using a vacuum cleaner.
Heat exchanger
element
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 exchanger element.
• Do not press the nozzle of the vacuum cleaner hard
against the heat exchanger element; otherwise, the
surface of it will be scratched.
• Do not wash the heat exchanger element in water.
Reinstallation after
maintenance
1
Attach the filters and High efficiency filters.
Attach the filters after they have completely dried.
Attach them to the frame of the heat exchanger
element as before.
High efficiency
filter
Heat exchanger
element
Filters
– 77 –
2
Attach the heat exchanger elements.
Install the heat exchanger elements as before.
Filters
NOTE
Attach the filters. If you use this unit without them, the
heat exchanger elements will become clogged and a
breakdown may result.
3
Attach the inspection cover.
Fit the fixing lever to the inspection cover to attach
it securely and fix the fixed part of Inspection cover
with a screw.
Inspection cover
Fixing lever
Cleaning remote controller
• Wipe with a dry, soft cloth.
• Do not use benzine, thinner, scouring powder,
chemical cloth, etc. as those may cause deformation
or breakage.
Maintenance and safety
checks (for installers)
Ask the dealer to carry out the following safety checks
once a year for your continued use of our product.
• Turn off the circuit breaker in the power distribution
panel before starting safety checks.
• Do not use any detergent or the like when cleaning
the humidifier. (VNK type only)
Safety
checks
Parts to
check
Items to be
checked
Clogging with
Clean the strainer
Strainer
dust
if it is clogged.
(VNK type
Damage of the
Replace the ring if
only)
O-ring
it is damaged.
High efficiency
Replace the
Water leakage
filter
humidification
from the
element if water
surface of
squirts out of the
humidification
surface of
element
element.*
Vacuum the
element if the air
Humidification
way is blocked
element
with dust. (Take
(VNK type
care not to
only)
Dust and dirt on
damage the
the surface of
surface of
humidification
element.) or,
element
wash the element
with water
according to the
instructions on
page 78.
Clean with a cloth
Dust and dirt on
if there is dust and
Drain pan
the surface of
dirt on the drain
drain pan
pan.
* A small amount of water may come out because of
condensation. This is not unusual.
◆ Preparation for cleaning
1
Close the service valve. (VNK type only)
(For preventing water remaining inside from
spattering)
2
Prepare for water leakage. (VNK type only)
Water inside the humidification element will spill
out. Take measures for water leakage, such as
laying a plastic sheet.
3
Drain water remaining in the pipes. (VNK
type only)
Open the drain valve and catch water using a
bucket or the like.
Screws
Maintenance
Maintenance
cover (for the
cover (for the
humidification
humidification
element)
element)
Drain valve
Drain pipe
Possible
Actions
failures
No
humidification
Water leakage
Water leakage
Reduced fan
power
Reduced
humidification
performance
Water leakage
Service valve
154-EN
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