The repair and maintenance practices of air conditioning and refrigeration equipment require precision instruments since minimal errors can translate into a loss of money, lack of comfort, damage to the environment or damage to the unit.
To carry out any connection to a team, the person who is going to carry it out must have the appropriate training and skills to execute a good practice that results in the optimal and efficient operation of the unit, avoiding second or third revisions, which will affect the encouragement and economy of the client.
Good preparation of the technician is accompanied by theoretical notions, but more important are the skills he has to carry out his activities in the field, which means knowing the diagnosis that must be made of an HVAC equipment and how to carry out its repair or maintenance.
At this point, the tools that the engineer or HVAC technician must use to carry out activities such as detecting leaks, analyzing the gas load, executing the refrigerant gas recovery, applying autogenous welding, among other activities, come into play.
For the implementation of these different actions, the industry has made available to technicians a series of tools, which if at first, they could have been somewhat rudimentary, have currently evolved significantly, offering greater comfort and safety in their use, in addition to transmitting more accurate results with little margin for error.
Multi-Plug Remover: It is very useful to extract pivots in the case of recovering refrigerant gas. If you are recovering from a system that has these types of valves, you should try to remove the pivots from all of them. Another function that it has is that it serves to change the defective pivots that can cause leaks in the refrigeration system, avoiding the overflow of large quantities of refrigerant. This remover connects, closes and the manometer can be attached to it.
Recovery equipment (reclaimer, tank, and scale): Is a machine that is connected to the HVAC system and to the cylinder to recover gas depending on the method to be used (recovery in the gas phase, recovery in the liquid phase, Push / Pull method, liquid and steam method). This machine will extract all the liquid and gaseous refrigerant from a system, to leave it free and susceptible to being charged or recharged again.
Recovery tank: It is a cylinder that must meet DOT specifications. They are recognized because the little ones (13.6 kg and 22 kg) are painted on the shoulder area of the tank and the rest is gray. This tank consists of a “Y” valve, which has two inlets, a red one for liquid refrigerant and a blue one for gaseous, so at no time should the hoses be reversed and there is no need to mix gases. It should be noted that only the gas recovery tanks are identified to use used refrigerants, therefore, cylinders should not be used for new refrigerants, much less disposable ones.
Scale: This will be used for the weighing of the recovery tank, which must not be loaded beyond 80% of its capacity, so the technician must have a calculator on hand to determine not to exceed this limiting percentage. In the market, there are conventional scales, but you can also find electronic portfolio type scales that through a screen allow the cylinder to be loaded at 80% of its capacity, without exceeding it.
Torque wrench: This is a tool used to tighten nuts or bolts on an apparatus. It is worth noting that this should be used every time a manufacturer indicates a specific torque value, which could be indicated employing a table or in a manual, in such a way that the necessary torque force is applied to tighten a screw in a piece of equipment.
Failure to use this tool could cause leaks in the refrigeration compressors through the seals, or leaks in the mechanical seals, causing the screws to be slit due to over-tightening or being loose.
Phase sequencer: They use an electrical circuit with no moving parts. When the appliance is connected to the mains, a green light will illuminate when the phase sequence is correct, or a red light if it is inverted. There are currently phase sequencers that provide clear indications of three-phase systems using an LCD screen, in addition to determining the direction of rotation to signal the correct connections. They indicate the phase sequence and offer a frequency and voltage range (up to 700 V) suitable for commercial and industrial applications.
Hook ammeter: Used in the HVAC industry since the units run on electrical energy, this tool consists of an apparatus that has pliers, as well as a screen, in which the current intensity parameters in a line. Thanks to the hook ammeter, technicians avoid the inconvenience of having to open the circuit in which you want to measure the current to place a classic ammeter, guaranteeing greater safety.