VTS Medical Systems VENTUS COMPACT VVS021c Instructions For Use Manual page 135

EXCHANGER ROTARY
•
During maintenance operations on the rotary exchanger, check that:
o
the rotor turns freely. Excessive resistance may be caused by the sealing brushes being
pressed too far against the edge of the rotor. In this situation, adjust the brushes
accordingly. A worn seal must be replaced. If a previously removed seal is to be
reinstalled, it must be installed so that its direction is in line with the rotor's direction of
rotation. After replacing or adjusting the sealing brushes, the exchanger should run for
30 minutes to allow the brushes to fit to the rotor surface.
o
Check afterwards:
▪
motor current and compare it with the rated current to find out whether the motor
is overloaded.
▪
that the drive belt is not damaged and that it is clean and not slipping on the
cylindrical part of the rotor. If belt slippage still exists despite maximum tension
of the tensioning system, the belt should be replaced or shortened,
▪
that the air intake openings are not covered with dust or otherwise contaminated.
Any dirt should be removed with a soft-tipped hoover or compressed air.
•
The rolling bearings of the rotor and drive motor are lubricated continuously during operation.
The amount of grease in the bearings during installation of the exchanger is sufficient for long-
term operation and there is no need to lubricate the bearings during operation. It is recommended
that the motor and gearbox are cleaned of dust so that an insulating layer does not form on the
motor surface, which can lead to an increase in the operating temperature of the drive.
•
This exchanger should be inspected every four months and the inspection should cover the
technical condition as well as the level of fouling. The accumulation of dirt in the heat exchanger
fins is often limited to the first 50 mm in the exchanger. Prior to cleaning, adjacent sections of the
air handling unit should be protected from contamination.
•
The necessary cleaning should be carried out as follows:
o
using hoovers with a soft suction nozzle,
o
by blowing the ducts with a jet of air against the direction of normal air flow,
o
washing the air ducts along their entire length with water and non-corrosive aluminium
cleaning agents,
o
In the case of very dirty exchangers, a pressurised water jet can be used to clean them.
•
When cleaning the exchanger with mechanical means, maximum care must be taken not to
damage or deform the exchanger panels.
•
When operating the exchanger at temperatures below zero, it must be thoroughly dried after
cleaning before being put back into operation.
•
Inspection and maintenance of the rotary exchanger drive must be carried out at the following
intervals:
o
12 hours after launch,
o
1 week after launch,
•
at least every 3 months thereafter
www.vtsgroup.com OIMM VENTUS COMPACT - ver. 6.0.0 (06.2024) 135