© STULZ Tecnivel – all rights reserved
EN/11.2020 Technical data subject to modifications
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6. Maintenance
6.1
Safety instructions
All maintenance work has to be carried out under strict compliance with the country-specific accident
prevention regulations. In particular we refer to the accident prevention regulations for electrical
installations, refrigerating machines and equipment. Non-compliance with the safety instructions can
endanger people and the environment.
Maintenance work is only to be carried out on the units by authorized and qualified specialist staff.
Procedure instructions
• Carry out work on the system only when it is shut down.
• Switch off the unit at the controller and the master switch.
• Display a “DO NOT SWITCH ON“ warning sign.
• Switch off power conducting cables to the unit and secure them against being switched on again.
• Check to ensure that they are in the de-energized state.
6.2
Periodic maintenance
Activity
Action, if requiered
Maintenance Interval
DAMPERS
Check for contamination, damage and
corrosion.
Clean / repair.
6 months
Check mechanical function.
Repair.
6 months
Check actuators.
Repair / replace.
6 months
AIR FILTERS
Check pressure drop across the filter
Replace the filter when the maximal
allowed pressure drop is exceeded
and at least every 6 months.
1 month*
Check for damage, corrosion and odors.
Replace the filter(s) if needed.
3 months
*Indicative interval, depends on the level of outdoor air pollution.
AIR/AIR PLATE HEAT EXCHANGER
Check for contamination, damage and
corrosion.
Clean / repair.
6 months*
ROTARY HEAT EXCHANGER
Check for contamination, damage and
corrosion
Clean / repair
12 months*
Check tension of V-belt’s
Re-tension / shorten / replace
12 months*
*6 months for sorption wheel
COILS
