The following prescribed maintenance and service intervals for individual parts of the unit must be observed in order to maintain the validity of the MANDÍK, a.s. manufacturer’s warranty and to ensure fault-free and safe operation of the unit.
These intervals are intended for standard units under normal operating conditions. For units operated under different conditions (24-hour operation, higher operating temperatures, higher dust content in the ambient air, etc.), the maintenance and service intervals must be shortened by at least one level. The specific operating conditions are always decisive, and the intervals are determined during commissioning, training and handover of the unit.
All service interventions, maintenance and revisions performed must always be recorded in the unit operating log. The obligation to establish and keep the operating log lies with the person commissioning the unit. Entries on individual events are made by the unit operator.
ALL WORK, MAINTENANCE AND INTERVENTIONS ON THE EQUIPMENT MAY ONLY BE PERFORMED BY QUALIFIED PERSONS WITH THE APPROPRIATE AUTHORISATIONS (E.G. GAS INSTALLATION, ELECTRICAL INSTALLATION, ETC.)!
SERVICE WORK AND MAINTENANCE ON THE EQUIPMENT MAY ONLY BE PERFORMED WHEN THE EQUIPMENT IS SWITCHED OFF (UNINTENDED START-UP OR START-UP BY ANOTHER PERSON MUST BE PREVENTED)!
The exact procedure for switching off the unit using the service switch during service and operating activities is described in the previous chapter 6.5 MAIN ELECTRICAL SWITCH AND DISCONNECTION OF THE UNIT FROM THE POWER SUPPLY.
BEFORE ENTERING THE EQUIPMENT, ALL ROTATING PARTS (FANS, ROTARY HEAT EXCHANGERS, ...) MUST BE AT A STANDSTILL!
FOR FANS AND ELECTRIC MOTORS EQUIPPED WITH FREQUENCY CONVERTERS, A MINIMUM WAITING TIME OF 15 MINUTES IS REQUIRED DUE TO RESIDUAL VOLTAGE.
HEAT EXCHANGERS, PARTS OF THE HYDRAULIC SYSTEM AND PARTS OF THE EVAPORATOR COOLING CIRCUIT MUST BE COOLED DOWN TO AMBIENT TEMPERATURE; THE MAXIMUM SURFACE TEMPERATURE IS +40°C!
THE PRESSURE VALUES OF PRESSURISED SYSTEMS MUST BE EQUALISED TO AMBIENT PRESSURE!
All persons performing maintenance of air-conditioning units must be familiar with the content of the maintenance instructions and follow the recommendations stated therein. These instructions are only a supplementary source of information and assume knowledge of the installation and operating regulations for MANDÍK, a.s. air-conditioning units of the M/M+, P/P+, S/S+, T/T+, CPV, CPX and RTU series, and compliance with all requirements contained therein. The manufacturer accepts no liability for any damage caused by failure to comply with the installation and operating regulations and these instructions.
Air-conditioning units are machines for air transport and air treatment that require regular maintenance and cleaning. Depending on the scope and purpose of the air-handling equipment of which they form part, and also on the configuration and equipment of the air-conditioning unit itself, we recommend that the operator prepare local operating and maintenance regulations respecting the requirements of the installation and operating regulations and the maintenance instructions for MANDÍK, a.s. air-conditioning units of the M/M+, P/P+, S/S+, T/T+, CPV, CPX and RTU series.
All maintenance intervals stated in the following text are only indicative and apply to air containing a normal amount of pollutants. These intervals may be extended or shortened depending on local operating conditions, the nature of the equipment and the contamination of the transported air. These intervals also do not relieve the operator of the obligation to ensure fault-free and safe operation of the air-conditioning unit on a daily basis.
All components which, by their nature, are intended to be pulled out, opened or easily removed must be placed in such a position that the inside of the unit can be cleaned as thoroughly as possible.
Remove coarse dirt with a vacuum cleaner; use a damp cloth if necessary. In the case of greasy dirt, use neutral cleaning agents and then wipe the surface again with a damp cloth.
Any damage to painted surfaces or traces of corrosion must be treated and repaired with a suitable coating.
Moving parts (hinges, handles, etc.) must be treated with a lubricating spray as required.
All inspection doors must be correctly seated and checked to ensure that they open freely. Depending on the way the unit is installed, it may be necessary to additionally align the doors within the adjustment allowances on the handle and hinge screws. Correct seating of the doors on the sealing surfaces must be checked. Door seals must be checked and, in the event of leakage, repaired or replaced.
Inspection of the closure of service doors, covers and clamping elements
After completion of service, maintenance, cleaning or inspection activities, and before the unit is put back into operation, it must be checked that all service doors, inspection openings, covers and removable panels are correctly closed and secured.
The operator or service technician must in particular check that all handles, handle-hinges, clamps, locks, quick-release clamps and other fastening or securing elements are correctly closed and tightened. No cover, panel or service door may remain partially open, insufficiently tightened or unsecured.
The unit may only be put back into operation if all the above-mentioned elements are correctly closed, tightened and secured and if no persons, tools or foreign objects remain inside the unit.
ADDITIONAL OPERATION AND MAINTENANCE INSTRUCTIONS FOR INDIVIDUAL BUILT-IN SECTIONS ARE PROVIDED IN SEPARATE CHAPTERS ACCORDING TO THE SPECIFIC BUILT-IN SECTION.