VTS Medical Systems VENTUS COMPACT VVS021c Instructions For Use Manual page 136

HEAT RECUPERATOR (COUNTER-FLOW, HEXAGONAL, CROSSFLOW)
Maintenance of the exchanger is limited to checking its technical condition and the degree of fouling
of the aluminium plates, once every 4 months. The accumulation of dirt in heat exchangers is often
limited to the first 50 mm in the exchanger. Before cleaning, the adjacent sections must be protected.
The necessary cleaning should be carried out by one of the methods by:
•
vacuuming with a soft squeegee,
•
Blowing the ducts with an air jet in the opposite direction to the normal air flow,
•
washing along the entire length of the air ducts with water and non-corrosive aluminium cleaning
agents,
•
in the case of more dirty exchangers, they can be cleaned by rinsing with a high-pressure water
jet.
Special care must be taken during cleaning when using mechanical dirt removers and care must be
taken that the exchanger plates are not deformed or damaged. When operating the exchanger in
freezing temperatures, the exchanger must be thoroughly dried before restarting the air handling unit.
Check:
•
throttle operation,
•
condition of the condenser,
•
status of tray discharge,
•
ease of draining condensate,
•
Fill the siphon with water before starting the unit,
•
anti-FROST system (if present),
SOUND ATTENUATORS (DAMPING BAFFLES)
The silencer section is fitted with baffles made of non-combustible mineral wool to absorb acoustic
energy. Maintenance procedures include checking the contamination level of these baffles.
FAN UNIT
•
Before carrying out any work (repair, maintenance, service) on the air handling unit, especially
when opening inspection panels in the fan section and when removing covers over the drive
system, ensure that:
o
the appliance has been properly disconnected from the power supply. This applies to
both primary and secondary circuits,
o
the rotor does not turn,
o
The fan surfaces are cool and temperature-safe to the touch,
o
the fan is protected against unintentional start-up.
•
The fans are designed for dust-free air flow or air with a light dust content. They are not designed
to operate with aggressive gases, vapours or in a highly dusty environment. Operating the fans
in an unsuitable environment can lead to bearing damage, corrosion, impeller imbalance or
vibration.
•
The fan and motor of the unit are designed to meet specific requirements and for special
operating characteristics. The fan speed is set so that the air flow and the total impeller stress
concentration are appropriate for the ventilation system. A lower forced air flow rate causes
operational disturbances and leads to an imbalance of the entire ventilation system.
•
This can be caused by:
www.vtsgroup.com OIMM VENTUS COMPACT - ver. 6.0.0 (06.2024) 136