CIAT Climaciat Instruction Manual page 38

ƒ Frequency:
- Every three months,
- Every month for ATEX units
- Follow the instructions given in section 10.1 General recommendations for cleaning
ƒ The siphon level must be checked periodically. Operation without condensation or prolonged downtime may result in
evaporation of the water it contains.
- Clean and disinfect the siphon with a suitable product.
- Clean and disinfect the drain pans with a suitable product.
ƒ Check without disassembling the wheel
- Cleanliness is a determining factor in the unit's performance, therefore check the condition of the fins, the fouling level, the
corrosion level and for any damage.
ƒ Cleaning the exchanger:
- For a low fouling level: dust removal with a vacuum cleaner is sufficient. In general, self cleaning, which results from the
reversed cross flows of air, means there is no need for manual maintenance on the wheel,
- For a medium fouling level (non-clogging dry residue): blowing against the normal flow direction may be necessary
(compressed air used with precautions),
- For a very high fouling level (clogging wet or greasy dust residue), use hot water and a gentle detergent,
- Check the condition of the brush seals and make sure there are no foreign objects. Adjust or replace the brush seals if
necessary,
- Check the condition and tension of the belt.
ƒ Motor belt:
- Natural elongation of the Powerbelt and/or normal wear may require it to be retensioned. An initial inspection of the belt
must be performed following the first 24/48 hours after system start-up in order to secure the wheel's rotary function. To
retension the belt, simply shorten it. The correct tension is obtained by removing 1 to 2% of the nominal length. 1 to 2%
corresponds to 1 link per metre of belt,
The belt is made from links that can be easily added or removed without the use of a tool. The belt can be shortened simply
by twisting in order open and remove the links. For the Powerbelt, remove one link per metre of belt to obtain the optimal
tension.
HEATEX photos
- In cases of significant wear, replace the belt (see complete procedure supplied with the belt)
- Check that the wheel rotates freely (no friction against the frame).
- Check for noise from the roller bearings and make sure they are not corroded. Replace if necessary.
- If the AHU is stored or out of service for a prolonged period, the wheel must be rotated regularly to prevent a flat spot/
pressure (weight of the wheel deforming the roller bearings).
ƒ Rotor bearing:
- The rotor bearings are usually lifetime lubricated and do not require any special
lubrication. The service life of the roller bearings is between 6 and 10 years
(these values may vary depending on the quality of the ambient air, which may
be more or less corrosive).
- For large heat recovery units (supplied in several sections depending on the
supplier), the rotor may require lubrication.
- Make sure the pressure and temperature sensors (option) are operating
correctly.
10.9.2.3 Check requiring disassembly of the wheel
- Switch off the electrical supply
- Remove the motor access door, the upper panel (or door if variable speed), and
the lock T.
- Disconnect all the supply and control wires and pull them over the roof to prevent
them from being cut.
- Remove the heat recovery unit, sliding it outwards.
During removal, disconnect the condensate drain pipe located between the recovery pan on the rotary heat exchanger and
the siphon located in the unit's base panel.
- Perform the maintenance operations listed in § 10.8.2.1 above.
- Refit the heat recovery unit in the reverse order to removal
Be sure to reconnect the condensate drain pipe in the siphon before pushing the heat recovery unit in fully.
EN - 36
Lubrication head
Rotor shaft