Maintenance; Once The Unit Operates In Normal Condition; Every 3 Months; Every 12 Months - P.LEMMENS hrmural TAC 5 Manuel D'installation Et De Maintenance

5. MAINTENANCE

Attention: before handling and/or opening the access panels it is compulsory to shut down the power supply
using the general switch.
Regular maintenance of the HRmural unit is essential to guarantee a good operation of the device and a long life
expectancy. The maintenance frequency will depend on the application and on the actual environment conditions
but in a general way the following controls are advised:

5.1. Once the unit operates in normal condition

Replace the starting filters kit by a kit for replacement filters. See Section 1.4 of this booklet.

5.2. Every 3 months

1. Check for any alarm indicated on the control device. In case of alarm refer to control manual.
2. Check the state of filter clogging. The control device allows to set a pre-defined 'filter clogging' threshold (refer
to installation manual). If need be replace filters. Filters that are too clogged can generate the following
problems :

Insufficient ventilation

Excessive increase of fan rotation speed, creating excessive sound level

Excessive power consumption (power consumption will increase exponentially to an increase in pressure
drop, for a constant airflow)

A damaged filter allows unfiltered air to enter heat exchanger (risk of clogging) and into ventilated room.
See § 1.4. for list of replacement filters
3. Inspection and cleaning of the inside of the unit:

Vacuum clean any accumulation of dust in the unit

Inspect and gently vacuum clean if need be the heat exchanger. Use brush accessory to protect fins

Clean the possible condensation marks and possible accumulations in the drain pan

5.3. Every 12 months

1. Check for any alarm indicated on the control device. In case of alarm refer to installation manual.
2. Check the state of filter clogging. The control device allows to set a pre-defined 'filter clogging' threshold (refer
to installation manual). If need be replace filters. Filters that are too clogged can generate the following
problems :

Insufficient ventilation

Excessive increase of fan rotation speed, creating excessive sound level

Excessive power consumption (power consumption will increase exponentially to an increase in pressure
drop, for a constant airflow)

A damaged filter allows unfiltered air to enter heat exchanger (risk of clogging) and into ventilated room.
See § 1.4. for list of replacement filters
3. Inspection and cleaning of the inside of the unit:
- Vacuum clean any accumulation of dust in the unit.
- Inspect and gently vacuum clean if need be the heat exchanger. Use brush accessory to protect fins.
- Clean the possible condensation marks and possible accumulations in the drain pan.
- Clean drain pan.
- Clean the inside of the bypass.
4. Fan maintenance:
Check again if power supply is shut down and fans are not running.
Check cleanness of fan. Clean if necessary, be careful not to alter balancing of the fan wheel (do not remove
balancing clips). Dismount fans if necessary.
5. Check airtightness of unit:
Particularly check that side access panels are well closed and that airtightness seals are in a good state.
Replace if necessary.
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Although we put a lot of care in the making of our documentation, we cannot be held responsible for any error and/or
omissions that could have slipped in.
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