Function Of The Main Components - Daikin EWWD120MBYNN Operation Manual

Function of the main components

A B
B1P
13
12
Y11S
S1PH S14PH
Y15S
6 9 5
Y16S
7
S3T
EWWD120~280
Figure - Functional diagram
1 Evaporator
2 Condenser
3 Water out
4 Water in
5 Drier
6 Discharge stop valve
7 Charge valve
8 Stop valve
9 Strainer
10 Sightglass
11 Safety valve
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
refrigerant in the refrigeration circuit. It compresses the refri-
gerant 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 blockage of the tubes.
The drier takes water out of the system.
EWWD120~540MBYNN
Packaged water-cooled water chillers
4PW22685-1
C
B3P B1P
13 13
R9T
14 12
M1C
15
(*)
R4T
8 10 2 1
(**)
12 Expansion valve
13 Suction stop valve (option)
14 Electronic expansion valve
15 Flowswitch
16 Filter
A only for EWWD120~180
B only for EWWD240~280, EWWD440~540
C only for EWWD360
D only for EWWD440
E only for EWWD500~540
D E
B4P B6P
13 13
12 14
16
R3T
4 4
3 3
R6T
R5T
EWWD360~540
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.
Evaporator
The main function of the evaporator is to take heat from the
water that flows through it. This is done by turning the liquid
refrigerant,
refrigerant.
Water in/outlet connection
The water inlet and outlet connection allow an easy connection
of the unit to the water circuit of the air handling unit or industrial
equipment.
Flowswitch
The flowswitch protects the evaporator of the unit against
freezing when there is no waterflow or when the waterflow is too
low.
Waterfilter
The waterfilter protects the evaporator against clogging.
F H
R10T
11 11
G J
11 11
M2C
) ( *
Y26S
(***)
(*) See A~E
(**) - Standard
(see F and G) only for EWWD120~180,360
- Dual pressure relief valve (OP03)
(see H and J) only for EWWD240~280)
(***) - Standard
(see F and G) only for EWWD360 and 440
- Dual pressure relief valve (OP03)
(see H and J) only for EWWD500~540)
coming from the condenser,
11
11
Y21S
S2PH S15PH
Y25S
S4T
into gaseous
Operation manual
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