Trox Technik SCHOOLAIR-S-HV, Installation And Operating Manual

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9 Maintenance
9.1 Maintenance and cleaning
DANGER!
Danger of electric shock! Do not touch any live com-
ponents! Electrical equipment carries a dangerous
electrical voltage.
Switch off the supply voltage and secure it against
being inadvertently switched on again before working
on the unit.
WARNING!
Risk of burning or scalding! The heat exchanger is
hot! Before you work on a heat exchanger, switch it
off and leave it to cool.
Maintenance
The level of contamination of a ventilation unit depends
to a large part on the location of the building and on the
length of daily use of the unit.
The system owner should therefore set maintenance
intervals based on the hygiene requirements. The legal
hygiene requirements have to be met.
An increased dust exposure due to construction work is
to be expected during the first three months after initial
commissioning; this is why filters should be replaced
after three months, and the unit should be cleaned.
We also recommend you to randomly check the con-
tamination level of filters every three months during the
first year and use the result as a basis for setting further
maintenance intervals.
Operational reliability requires that the necessary
maintenance measures are taken in the suggested
maintenance intervals,
Ä
‘Maintenance measures’
on page 49
Hygiene inspection
A hygiene inspection to VDI 6022 is due every three
years. Hygiene inspections have to be carried out by
sufficiently qualified individuals and on a random selec-
tion of typical ventilation units. If any hygiene issues are
detected, all decentralised ventilation units have to be
cleaned.
Cleaning

Cleaning intervals to VDI 6022.

Clean all surfaces with a damp (not wet) cloth.

Use only common household cleaners, do not
use any caustic, scouring or otherwise aggressive
cleaning agents.

Carefully clean the rotary heat exchanger with an
industrial vacuum cleaner. Be careful to not damage
the fins. We recommend using a soft brush with the
suction inlet.
9.2 Maintenance
9.2.1 Checking and replacing the filters
Personnel:

Facility manager
Tool:

Commercially available vacuum cleaner
CAUTION!
Risk of allergic reaction to filter dust!
– Wear a dust mask when you change a filter.
As standard, filters have to be changed every
12 months; they have to be changed earlier in the fol-
lowing cases:

The maximum differential pressure has been
reached (only for units with differential pressure
sensor).

The filters have a technical defect or don't meet the
required hygiene standard.
Use only original filters. Replacement filters can be
ordered from the manufacturer; state the filter mate-
rial number in your order (see page 2). The mate-
rial number is given on the filter and in the replace-
ment parts list, Ä 11 ‘Lists of replacement parts’
on page 45
Ä
Chapter 11.1 ‘Replacement parts list’
on page 45 .
1.
DANGER!
Danger of electric shock! Do not touch any
live components! Electrical equipment carries
a dangerous electrical voltage.
– Switch off the power supply before you
carry out maintenance or cleaning.
– Only skilled qualified electricians are
allowed to work on the electrical system.
Switch off the supply voltage and secure it against
being switched on accidentally before cleaning the
unit.
2. Open both inspection access doors on the ventila-
tion unit.
Maintenance
Maintenance > Checking and replacing the filters
Decentralised ventilation units SCHOOLAIR-S-HV 41