Maintenance of ventilation and air conditioning systems is carried out by persons and organizations with a special license. To conduct this activity requires certain knowledge and skills.
In accordance with the legislation, entities conclude an agreement on the maintenance of ventilation systems . This document prescribes all the work, as well as the timing of their implementation. In addition, the standard regulations for the maintenance of ventilation systems apply. He establishes general rules for the performance of work.
License
It is necessary for all entities engaged in the maintenance of ventilation and air conditioning systems . The corresponding requirement is provided for by federal law governing the licensing of certain types of activities (99-FZ).
To obtain permission for the maintenance of ventilation and air conditioning systems, it is necessary to submit to the authorized body copies certified by a notary:
- Of the Charter.
- Memorandum of Association.
- Certificate INN, OGRN, on amendments to the register.
- Certificate of receipt of the OKVED code (issued by the State Statistics Committee).
- On changes in the charter documents, decisions on the appointment of the head, creation of the organization.
- The lease agreement (St. Law of ownership) on the premises.
- Papers confirming the necessary education from specialists and the general director.
- Identity documents of specialists and the general director.
The following papers are attached:
- An extract from the state register certified by a notary. Moreover, it should be received no more than 14 days.
- Settlement accounts.
A package of documents is submitted to the licensing authority at the place of business. 30-45 days are allotted for consideration. Having obtained a license, an enterprise can carry out maintenance of ventilation and air conditioning systems in any region of the Russian Federation.
Contract
It is concluded by the customer and the person who will carry out the maintenance of ventilation systems . The following clauses must be present in the model contract:
- Subject of the agreement.
- Obligations of the participants.
- Cost of work, estimated budget.
- The procedure for acceptance and delivery of work performed.
- Responsibility of participants.
- Dispute Resolution Procedure.
- Additional / final provisions.
- Details of the parties.
The contract should contain links to applications. They determine a specific list of work on the maintenance of ventilation systems . It also sets their frequency and duration.
It is also necessary to attach to the contract a protocol for coordinating the cost of maintenance of the supply and exhaust ventilation system.
Features of the regulation
This document defines the frequency of maintenance work for each individual module in the system:
- Fans.
- Calorifiers.
- Filters.
- Damper.
- Electrical parts.
- Controllers.
The regulation provides for maintenance work, the list of which is determined by the manufacturer of the system and depends on the purpose of the equipment.
Typically, ventilation system maintenance is carried out quarterly.
Checking the efficiency of equipment
It is carried out along with the current repair. During the test, an aerodynamic test is carried out, in which:
- Productivity of general exchange, emergency, backup ventilation.
- Total pressure pumped by fans.
- Startup pressure boost rate.
- The volume of air flow passing through the main sections and branches.
- Differential pressure between the system chamber and adjacent rooms.
- No air leaks and leaks.
- Multiplicity of air exchange.
After verification, the obtained data are compared with the design, malfunctions and defects of the system are identified, the necessary amount of work is planned.
Cameras and Mines
During maintenance of the exhaust ventilation system , the following is checked:
- The connection density of the transitions to the chamber from the fan, the condition of the sections of the passage through the roof.
- The state of the nets, filters, umbrellas, louvres over mines. If necessary, they are cleaned.
- Tightness of mine structures, sound and heat insulation.
- Bolted fasteners.
- Support structures for dents, corrosion, holes. The quality of the paint is also checked.
Maintenance and repair of the ventilation system also includes:
- Tightening bolt connections, including with the replacement of fasteners in the presence of defects.
- Replacing defective grids, filters, louvres.
- Restoration (reapplication) of a corrosion-resistant coating.
Fans
During the maintenance of ventilation systems, the following is checked:
- The tightness of the sections, the condition of the casing, the connections of its elements.
- Couplings, pulleys, shafts, belt drive conditions, absence of extraneous noise, bearing temperatures, pulley landing on the shaft, suction.
- The alignment of the drives, the relative positions of the fan and the electric motor (with belt drive), the horizontal level of the fan.
- The state of vibration, soft inserts, grounding, as well as the integrity of the frame.
In addition, the following are performed:
- Measurement of vibration on the foundation bolts and bearings of the ventilation units.
- Short-term start-up of redundant and rarely used fans.
- Tightening fasteners, correcting defects in seams and dents in the casing (replacing it if necessary).
- Replacing the blades.
- Belt replacement.
- Welding cracks on the impeller.
Maintenance of smoke exhaust and smoke ventilation systems
In the process of maintenance, the following types of work are carried out:
- Checking the tightness of fasteners with tightening bolts.
- Detection of holes, corrosion, dents.
- Checking fasteners (clamps, brackets, suspensions).
- Performance assessment of fire dampers, gates, other regulating and locking devices.
- Visual inspection of the technical condition of fire retardant and check valves for cracks and other defects.
- Checking the position of the shutter.
- Checking valve fixation to duct.
- Assessment of the work of exhaust and intake devices.
As part of the current repair, among other things, the following are carried out:
- Checking the operation of the shutter flaps, troubleshooting.
- Restoration of gratings and grids.
- Correction of dents, bends.
- Replacement of worn out items.
- Troubleshooting regulatory and locking devices.
- Regulation of the position of local suction pumps installed in places accessible without disassembly.
- Replacement of heat, fire insulation.
- Repair of fire retardant and anti-corrosion coatings.
Deflectors and air heaters
Maintenance of these devices includes:
- Monitoring the condition of the fixation points of the deflectors.
- Valve control check.
- Control the absence of leaks in the heaters.
- Evaluation of the effectiveness of maintaining the temperature level.
If necessary, heaters are sealed (in case of depressurization).
Automation
Inspection and repair of equipment is carried out in accordance with the schedule of maintenance of ventilation systems , approved by the enterprise.
In the course of the work, the effectiveness of the system’s functioning is assessed with the correctness of the indicators of the specified modes (winter / summer). If necessary, the necessary parameters are set in accordance with the mode. These indicators are recorded in the act of completion.
All identified faults must be corrected.
Electric motors
During the service, the following is performed:
- Inspection and repair of identified visible damage.
- Inspection of cable entry condition, housing elements, gaskets.
- Short-term start-up or scrolling of the rotor during a break in operation for more than 3 months.
Additionally checked:
- Insulators, grounding conductor.
- Ground loop, guard rail, frame mount.
- Control systems, ventilation, cooling, protection.
Contaminated channels are cleaned; inscriptions on the casing are restored.
As part of the current repair:
- Disassembly of equipment in the required amount.
- Purge the rotor and stator with compressed air.
- Checking and measuring the clearance between the bearing cap and liner.
- Assessment of insulation resistance and other parameters.
- Checking the condition of the elements in the cooling system.
- Inspection of starting devices.
- Performance assessment by vibroacoustic and temperature indicators.
- Inspection, replacement, dismantling of the coupling half.
- Equipment assembly and testing.
Control systems
They include shields, consoles, junction boxes. Maintenance work includes:
- Inspection and detection of damage, contamination, corrosion, checking the reliability of fasteners.
- Purification of external elements from pollution and dust.
- Verification of legibility of inscriptions, reliability of fastening of plates.
- Inspection of seals, cables, grounding, covers.
- Checking the reliability of fastening parts, contact joints, the health of locks.
Mandatory carried out:
- Checking the attachment of enclosures to walls and other surfaces.
- Reliability of tightening parts and contact joints. If necessary, the contacts are cleaned.
- Checking the insulation status of cables, wires.
- Partial disassembly to detect defects.
- Checking the operation of protective devices.
- Restoration of inscriptions, insulation coating, coloring.
- Checking the compliance of devices with loads and operating conditions.
- Cleaning of external parts, lubrication of constantly rubbing elements.
- Identification of defective parts and assemblies.
- Checking the density of contact of the contacts and the simultaneous inclusion of their respective groups.
- Testing of warning lights, their replacement, repair of fittings.
Electroheaters
Device maintenance involves:
- Inspection and detection of external damage.
- Assessment of the state of switches, thermostat, regulators.
- Checking the functioning of the protective shutdown system and setting up devices.
- Cleaning of external elements from pollution and dust.
In addition, verification is carried out:
- Actual loads on connections.
- Cables, covers, glands, grounding for damage.
- Reliability of fastenings.
- Fuses.
- The status of circuit breakers.
- Settings of protective devices.
- Resistance of heating parts and insulation of lead wires.
Interseasonal regulations
They provide for technical measures aimed at preparing the ventilation system for launch or conservation. The first are made before putting the equipment into operation after the winter break. Maintenance of ventilation systems in preparation for the summer season is carried out in the spring. During it, specialists perform the following work:
- Opening shutoff valves.
- Drain antifreeze from the system (if it was flooded).
- Filling the hydraulic system with water.
- Air release.
- Preparing the system for automatic start remotely at the signal of the operator (dispatcher) or when a certain air temperature is reached.
Before the winter period, the system is conserved. All works included in the quarterly list are preliminarily carried out. Thereafter:
- Stop valves close.
- Water is drained from the system (coolant).
- Residual water is removed from the cooler. For this, air purging and drying are carried out.
If the last action is not possible, the cooler is filled with antifreeze, the remaining air is removed.