Daikin EWAQ100DAYN Dokumentacja Pobierz pdf (Strona 5)

EWAQ080~260DAYN

Packaged air-cooled water chillers

4PW35556-1C

Operation manual

Function of the main components

Figure - Functional diagram

As the refrigerant circulates through the unit, changes in its state or

condition occur. These changes are caused by the following main

components:

■ Compressor

The compressor (M*C) acts as a pump and circulates the refri-

gerant in the refrigeration circuit. It compresses the refrigerant

vapour coming from the evaporator at the pressure at which it

can easily be liqueﬁed in the condenser.

■ Condenser

The function of the condenser is to change the state of the

refrigerant from gaseous to liquid. The heat gained by the gas in

the evaporator is discharged through the condenser to the

ambient air, and the vapour condenses to liquid.

■ Filter/drier

The ﬁlter installed behind the condenser removes small particles

from the refrigerant to prevent damage to the compressor and

expansion valve.

The drier takes the water out of the system.

■ Expansion valve

The liquid refrigerant coming from the condenser enters the

evaporator via an expansion valve. The expansion valve brings

the liquid refrigerant to a pressure at which it can easily be

evaporated in the evaporator.

p <

p >

(*)

M12CM11C

p <

p >

M22C M21C

M15F

M13F

M14F

M25F

M23F

M24F

B1PH B2PH

S2PH

S1PH

R17T R37T

R14T R34T

B1PL

B2PL

R15T R25T R35T R45T

Y11E Y21E

PHE

t >

1010

(*)

12 12

15 15

6 6

1010

12 12

DDD

2132

t > t >

R3T R2T

D D

1 Water outlet 11 Electronic expansion valve + sight

glass with moisture indication

20 Service port 30 Filter

2 Evaporator 21 Drain valve 31 Shut off valve

3 Water inlet 12 Check valve 22 Regulating valve 32 Water circuit safety valve

4 Compressor 13 Condenser 23 Pump

5 Suction stop valve (optional) 14 Ambient temperature sensor 24 Fill port (*) Standard (A) or dual pressure

relief valve (B)

6 Discharge stop valve (optional) 15 Fan 25 Drain port

7 Refrigerant circuit safety valve 16 High pressure sensor 26 Expansion vessel A Standard

8 Drier/charge valve 17 Low pressure sensor 27 Pressure gauge B Dual pressure relief valve

9 Liquid stop valve (optional) 18 High pressure switch 28 Air purge C Only for 70~80 HP units

10 Oil sight glass 19 Flowswitch 29 Buffer tank D Optional

1 2 3 4 5 6 7 8 9 10 ... 29 30

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