W9
Smart
16
All rights to changes reserved.
2021-09-23
4.1 Service reminder
The service reminder is activated with preset time inter-
vals and the symbol is displayed on the control panel’s
screen. As a factory setting, the service reminder is not
in operation. It can be put into operation under the
main menu item “Diagnostics”/”Service reminder”. The
recommended service interval for the ventilation unit is
six months.
When servicing has been performed, the service remind-
er is reset from “Alarm” in the main menu.
4.2 To open the ventilation unit
Before you begin any service work, isolate the power
supply voltage to the ventilation unit by pulling out its
electric plug from the wall socket. Wait a few minutes
before you open the inspection door of the ventilation
unit so that the fans have time to stop and possible air
heaters have time to cool down.
Open the inspection door by turning the two lock bolts
with a screw driver for slotted screw heads.
4.3 Filter
The filters should be replaced at least every six months.
The filters may need to be cleaned or replaced more of-
ten in homes where there is considerable dust or if there
are many impurities in the outdoor air.
The ventilation unit must not be operated without
filters. Use only filters recommended by Swegon in the
ventilation unit. This is important, as filters with exactly
the same appearance and size can have very different
pressure losses and filter capacity. If an incorrect filter is
used, it is not certain that the ventilation unit will work
as designed. Check in the list of components that you
have selected correct filters.
4.4 Heat exchanger
You should check the condition of the heat exchanger
whenever you service the unit.
You need to check that the heat exchanger has not
frozen to the air handling unit’s frame during cold
spells. When necessary the air handling unit’s inspection
doors should be held open for a while before the heat
exchanger is removed from the unit, so that the tem-
peratures have time to equalize and to prevent damage
to the seals.
Remove the heat exchanger mounting brackets secured by
four screws. Withdraw the heat exchanger from the unit
for inspection. Do not damage the heat exchanger fins.
Make sure that the passages through the heat exchang-
er rotor are not clogged and clean them e.g. with run-
ning warm water if required. Never use cleaning agents.
The passages of the heat exchanger should be dry
before you reinstall the heat exchanger in the unit.
4. Service
4.5 Fans
The ventilation unit’s fans must be checked at least
every two years.
The fans can be removed from the ventilation unit by
loosening the retaining nuts (4 per fan) and lift up the
fan collar. If you pull the fans out completely, you must
also disconnect the quick-fit connectors.
If necessary, clean with a soft brush. Be careful not to
dislocate the impeller balancing weights. If significant
amounts of dirt collect on the fan impeller cleaning
should be left to a professional.
The fans must be removed from the ventilation
unit when the ventilation ducts are cleaned.
4.6 Other servicing
Clean the inner surfaces of the ventilation unit by va-
cuum cleaning or with a damp cloth, if needed.
Check that dirt has not collected on the surfaces of the
air heater/coolers, clean if necessary.
Check that the condensate discharge outlet is not
clogged and check its outflow by pouring water on the
bottom of the ventilation unit. The condensate dischar-
ge connection is located on the rear of the unit under
the rotary heat exchanger.
Check that the ventilation unit works normally and that
no alarms are shown on the screen or on the cooker
hood.
Important
The ventilation unit must not be operated
without filters! Use only filters recom-
mended by Swegon in the ventilation unit.
Find the correct filter in the Section enti-
tled: ”Technical data”.
!
!
