Discovery, Assembly and Commissioning
Due to the fact that air conditioning systems are operating under pressure and risks related to electricity; There are dangerous situations during assembly and commissioning. For this reason, installation and commissioning must be carried out by experts.
Before assembly; the location of the indoor and outdoor units and where the copper piping is to be drawn should be well defined. If there are any inconsistencies between the project and the construction site, the employer should be warned before the necessary arrangements should be made. For this reason, reconnaissance service is also a very important element.
Selection Criteria for Mounting Place
Selection Criteria for Indoor Unit Location
– The suitability of the selected capacity should be reviewed when the relevant site is visited.
– Check where the drainage installation is located. There should be an expense that does not cause problems for the drainage line and the drainage system should not be given to the sewage system.
– The location of the indoor unit must be well determined so that the chilled air is not delivered directly to people using the space. The location should be determined in such a way as to ensure a homogeneous distribution of air. Thus, the heating and / or cooling of the space becomes comfortable.
– The technical documents of the relevant company should be based on the place where the indoor unit will be installed and the gaps to be left.
– The place where the indoor unit will be hung should have a structure that can support its weight.
– The location should not be near flammable gases.
– Do not expose the device to direct sunlight.
– It should be checked whether there are high frequency emitting machines in the place to be settled. Air conditioners installed in such an environment can cause serious electrical and electronic circuit failures.
– Indoor units; laundry, kitchen etc. should not be installed in extremely humid environments. Excessive moisture reduces the performance of the system.
– The performance of the system increases as the distance between the indoor unit and the outdoor unit decreases.
Selection Criteria for Outdoor Unit Location
– The outdoor unit; It should be placed in a place where it can easily circulate over the outdoor air.
– The outdoor unit; should be placed in a suitable place for easy servicing, installation and, if necessary, de-installation.
– In terms of system performance and initial investment cost, the place where the copper pipe installation between outdoor unit and indoor unit is the shortest should be preferred.
– Outdoor units; in the shade as much as possible in the summer, snow, rain and so on in the winter. should be located in places that can be protected according to the outdoor conditions.
– Installation near heat sources, blowing openings of other air conditioners, exhaust fans, steam and flammable gas sources should be avoided.
– The air suction sections between the outdoor units and the wall should not be mounted as far north as possible to reduce the accumulation of snow on the condenser surface in the winter.
– The devices must not be installed directly on the ground.
– If the outdoor units are installed on building facades and / or where people may pass underneath, the drainage water that will flow when the appliance is operating in heating will disturb people. In such places, pan should be made under the outdoor units and drainage formed should be drained with pan.
– Vibration absorber rubber wedges should be placed under the outdoor units.
Periodic maintenance
The main function of air conditioners is to keep the temperature and humidity values of the place constant under the desired comfort conditions with maximum performance and efficiency by spending minimum energy. However, after a certain period of use; the dirt and dust accumulated on the indoor and outdoor unit coils surfaces of the devices, indoor unit filters adversely affect the heat transfer. Ler Periodic maintenance ”process is important in order to prevent malfunctions, reduce operating costs and ensure the performance of the devices in the periods of use after the commissioning of the system.
It is recommended to carry out periodic maintenance operations twice a year, before the cooling season (beginning of summer) and before the heating season (beginning of winter).
Periodical Maintenance Procedures
The main operations performed during the periodic maintenance are as follows:
– Supply voltage and current measurements of indoor and outdoor units
– Low voltage line voltage measurements of the control circuit
– Determination of the current values of the compressors
– Speed, current and resistance values of evaporator fans
– Speed, current and resistance values of condenser fans
– Operating current controls of all electrical circuits operating in the outdoor unit
– Low pressure circuit pressure measurements
– High pressure circuit pressure measurements
– Refrigerant pressures should be controlled depending on the outside temperature, if the fluid is missing additional charging should be performed.
– Inspection and cleaning of evaporator air intake filters
– General cleaning and control of indoor units
– Cleaning of evaporator serpentine surfaces with the help of pressurized (if warm) water
– Cleaning of condenser serpentine surfaces with the help of suitable chemical and pressurized water
– Leakage, slope and cleaning checks of drainage lines, cleaning if necessary
– Corrosion testing of all cable connectors and terminals
– Control of high voltage inputs
– Control of electronic cards in indoor and outdoor units
– Control of room thermostat settings, simple operation test
– Copper pipeline insulation checks, if necessary repair
– Crushing and leakage checks of copper pipeline
– General checks of all copper piping
General Air Conditioner Faults and Diagnosis
In the following, the malfunctions of the air conditioners and their solutions are briefly explained.
In general, the most common complaints about air conditioners are listed below:
– The air conditioner does not cool
– The air conditioner does not heat
– The air conditioner smells.
– The air conditioner is audible
– Air conditioner leaks water
As can be seen, the overall framework of complaints is actually very narrow. However, there may be several reasons why the air conditioner may not cool or heat sufficiently. The actual problem will arise when the authorized service personnel inspect the device.
Diagnostic Steps
1. Determine the state of the problem
2. Collection of data
3. Analyzing the data
4. Deciding on corrective action
5. Perform this operation
6. Check the results and make the necessary arrangements to prevent the failure again.
Although the operating principles and cooling cycles of air conditioners are the same, each brand and model can have its own control system and operating conditions. When searching for the causes and remedies of the fault, it is useful to refer to the technical service manuals of the air conditioner concerned, otherwise unnecessary and incorrect service may be performed.
First of all, the complaints of the consumer should be heard completely and completely. It should be natural for the consumer to explain their complaints in a very simple and simple way. Necessary information can be obtained from the consumer with short and correct questions to be asked by the technical service officer. All possibilities should be considered in the controls to be performed and the above order should be followed. There is one thing that should not be done is to remove any parts we are not sure about. Never attempt to resolve the fault by trial and error. Improper operation may result in further damage to the device.
Having complete and complete equipment is very important in solving the fault and not making mistakes. It is useful not to intervene the devices with missing service tools and, if necessary, to provide the relevant spare parts in case of possible failures. This measure will ensure consumer satisfaction by shortening the elimination time of the fault.