Daikin EUWY 24KBZW1 Series, Service Manual

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Piping Layout ESIE11-02
1–66 Part 1 – System Outline
3
11
4
5
Components water
side The table below describes the main components of the refrigeration circuit on the water side.
11 High-pressure
service port The high-pressure service port is used to connect a
high-pressure gauge.
12 Liquid receiver The liquid receiver temporarily holds the refrigerant which has
been liquified by the condensor before being send to the
expansion valve.
13 Accumulator The accumulator is used to separate the gas from the liquid in
order to prevent the compressor from pumping liquid.
14 4-way valve The 4-way valve is energized during cooling.
No. Component Function / remark
No. Component Function / remark
a Shut-off valve Makes it possible to shut-off a part of the water
piping for maintenance (e.g. to change a filter).
b Airport To purge the water circuit, to prevent air from
entering the water circuit.
c Service port The service port is used to connect a pressure
gauge.
d Water tempera-
ture sensor The water temperature sensors are used to control
the thermostat function at the heat exchanger inlet.
e Freeze-up sensor This protection device shuts down the circuit when
the temperature of the chilled water becomes too
low in order to prevent the water from freezing
during operation.
f Strainer This strainer prevents dirt particles from entering
the water circuit.
g Flow switch The flow switch is used to check if there is flow.
h Drain valve The drain valve is used to drain water from the
circuit.
i Expansion vessel The expansion vessel deals with water expansion,
which occurs when the temperature of the water
varies.
j Pump The pump circulates the water.
k Pressure gauge Standard is the pressure gauge fitted to the unit.
n Safety valve Maximum 3 bar pressure.
l Buffer tank This buffer tank of 55 l is used to store chilled water
to prevent the compressor from switching ON/OFF
continuously depending on the load.
m Pressure regula-
tion valve The pressure regulation valve is used to regulate
the pressure of the water side.
EUWYB5-24KBZW1
EUWYP5-24KBZW1 EUWYN5-
2
4KBZW1