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10 - OPERATION AND MAINTENANCE
■ Numerous factors may lead to general overheating of the electrical components, resulting in activation of the thermostats.
- Examples:
• Powering up without ventilation,
• Insufficient air flow,
• Clogged filters,
• Reversing the fan's direction of rotation,
• Air dampers closed.
10.6 - Steam humidifier
For the adiabatic humidifier, see the instruction manual for the adiabatic evaporative humidifier.
Warning!
Follow the safety instructions (see § 2 - SAFETY INSTRUCTIONS).
10.6.1 - On the humidifier:
■ Ordinary maintenance simply involves having the steam cylinder replaced and the unit cleaned each year. These operations must
be carried out by qualified personnel, in accordance with the manufacturer's instructions (see manual supplied with the unit).
■ The information below constitutes the general rules to be followed:
- Check and clean the water filters.
- Check the electrical contacts and the correct operation and cleanliness of the supply and drainage solenoid valves.
- Make sure the steam distribution is free from deposits and leaks.
- Check the electrical current.
- Clean all of the pipes and check their general condition (porosity, hardness).
- If replacing the cylinder, check the condition and cleanliness of the gaskets and their faces.
10.6.2 - On the unit:
■ Follow the instructions given in section 10.1 General recommendations for cleaning
■ Check the condition of the rails and the pan, and the fouling level of the eliminator cells, and look for any corrosion or damage.
■ The drain pan siphon (option) must be activated during commissioning or after a period of prolonged downtime.
■ Clean and disinfect the siphon with a suitable product.
■ Clean and disinfect the drain pans with a suitable product.
■ Make sure the box is clean and free from foreign objects. Remove any impurities using a vacuum cleaner and/or a cleaning product.
■ Check that the humidity sensors (option) are operating correctly.
10.6.3 - Evaporative humidifier
Refer to the manufacturer's manual.
10.7 - Damper and mixing
Warning!
Follow the safety instructions (see § 2 - SAFETY INSTRUCTIONS).
■ Frequency:
- Every three months
- Every month for ATEX units
- Follow the instructions given in section 10.1 General recommendations for cleaning
■ For the dampers:
- Check the integrity and efficiency of the protective grilles.
- Clean the dampers, repair any damage and remove any corrosion. The blade drive shafts are mounted in plastic bearings, which
do not require maintenance.
- Check the condition of the linkages and replace if necessary.
- Make sure the blades are straight.
- Check the condition of the gaskets between the blades, and that they are perfectly joined.
- Uncouple the servomotor and make sure the blades rotate freely.
- Retighten the servomotor coupling.
- Actuate the dampers in the fully closed position and make sure the blades are perfectly joined.
- Place the damper in the fully open position before restarting.
- Remove any impurities using a vacuum cleaner and/or a cleaning product.
- Make sure the damper box is clean and free from foreign objects.
■ For the servomotors:
- Retighten the servomotor mountings,
- Make sure the drive (damper servomotor) reaches the end of travel positions (adjust the end limits if necessary).
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