Usu­al­ly con­nect­ing an air con­di­tion­ing com­pres­sor, but the oper­a­tion itself is sim­ple, and can be per­formed by the own­er of the cli­mate equip­ment. Pro­vid­ed that he knows and under­stands the design of the device. The com­pres­sor is locat­ed in the out­door unit of the split sys­tem. Let’s con­sid­er what oth­er mech­a­nisms are in this mod­ule, and how they are locat­ed.


Scheme of the refrigeration circuit of the external unit of the split system

Scheme of the refrigeration circuit of the external unit of the split system

  • Com­pres­sor. Com­pres­sor. It works with the refrig­er­ant, it com­press­es the fre­on and cir­cu­lates it through the sys­tem.
  • heat exchang­er. Heat exchang­er. There are two of these devices in the sys­tem: one is for the exter­nal unit, in it the refrig­er­ant is cooled to a tem­per­a­ture below the con­den­sa­tion point, the oth­er is for the indoor unit, this is an evap­o­ra­tor, where the work­ing flu­id evap­o­rates and gives off tem­per­a­ture.
  • 2 way valve. 2‑way expan­sion valve with two posi­tions: closed and open.
  • 3 way valve. Ther­moreg­u­la­to­ry 3‑way valve, it is a ser­vice port, hoses are con­nect­ed to it when fill­ing with fre­on or mea­sur­ing pres­sure in the sys­tem.
  • 4 way valve. Expan­sion valve 4‑way, which pro­vides reverse move­ment of the refrig­er­ant in heat­ing mode.
  • strain­er. A fil­ter that pre­vents mois­ture from enter­ing a thin chan­nel, since it can clog it and make it inac­ces­si­ble to the work­ing envi­ron­ment.
  • Muf­fler. This is a muf­fler.

The sol­id arrow of the dia­gram shows in cool­ing mode, the dot­ted arrow shows in heat­ing mode. In more com­plex air con­di­tion­ers, in addi­tion to the mech­a­nisms described above, oil sep­a­ra­tors, pres­sure sen­sors, a com­pres­sor injec­tion device, liq­uid fre­on sep­a­ra­tors and restart lines can be installed.

Electrical diagram of the outdoor module

Electrical diagram of the outdoor module

  • Ter­mi­nal. Ter­mi­nal box, where N is neu­tral, 2 is pow­er to the com­pres­sor, 3 is pow­er to the motor for 1st speed run­ning, 4 is pow­er to motor0 for 2nd speed run­ning, 5 is pow­er to the 4‑way valve for heat­ing.
  • Com­pres­sor. C — com­mon ter­mi­nal of the wind­ings, R — work­ing wind­ing, S — start­ing wind­ing, IOP — over­load pro­tec­tion, CC — work­ing capac­i­tor.
  • fan­mo­tor. Fan motor with overtem­per­a­ture pro­tec­tion (TP) and capac­i­tor (FMC).
  • S.V. A sole­noid valve that actu­ates a 4‑way valve.

Expert opin­ion

Ask an expert

The own­er of cli­mate tech­nol­o­gy must under­stand that each spe­cif­ic mod­el has its own scheme. Its struc­ture may dif­fer some­what in the con­fig­u­ra­tion and arrange­ment of ele­ments. The scheme is attached by the man­u­fac­tur­er, you can find it in the accom­pa­ny­ing doc­u­men­ta­tion or on the Inter­net, on the man­u­fac­tur­er’s web­site.

Step-by-step instructions for connecting the air conditioning compressor

When you have an air con­di­tion­ing com­pres­sor con­nec­tion dia­gram in front of you, you can pro­ceed to the pro­ce­dure. But there is one more pre­req­ui­site: you can change the com­pres­sor only to the unit that is rec­om­mend­ed by the man­u­fac­tur­er.

Work order:

  1. from refrig­er­a­tion and elec­tri­cal cir­cuits;
  2. instal­la­tion of a new unit;
  3. replace­ment of the fil­ter-dri­er;
  4. seal­ing the unit with a vac­u­um pump and oth­er equip­ment;
  5. fill­ing the sys­tem with fre­on;
  6. test­ing of cli­mat­ic equip­ment in all modes.

Connecting an air conditioner

Typical installation errors

Com­mon mis­takes that non-pro­fes­sion­als make are the fol­low­ing:

  1. fail­ure to vac­u­umize or car­ry out the pro­ce­dure incor­rect­ly, the con­se­quence of such actions will be: the pres­ence of water vapor in the fre­on line, high con­den­sa­tion pres­sure, and then a break­down in the engine insu­la­tion;
  2. vio­la­tion of instal­la­tion rules, includ­ing tube creas­es, non-obser­vance of slope angles, long routes, etc., because of this, the com­pres­sor lubri­ca­tion sys­tem fails;
  3. poor-qual­i­ty con­nec­tion of con­nec­tions of fre­on routes;
  4. the ingress of for­eign mat­ter into the lines.

If you avoid these errors, you can count on the per­for­mance and effi­cien­cy of the split sys­tem. But, if you are unsure of your knowl­edge, it is bet­ter to entrust the work to pro­fes­sion­al mas­ters of the ser­vice depart­ment of the cli­mate tech­nol­o­gy brand.

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