Daikin EUWL KZW1 Series, Service Manual

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Piping Layout ESIE-0303
1–32 Part 1 – System Outline
3
1 1
4
5
Components
refrigeration side The table below describes the components.
No. Component Function / remark
1 Compressor A hermetically sealed scroll compressor.
2 Water-heat exchanger
(evaporator,
condenser) The water-heat exchanger is of the brazed plate-heat exchanger
type.
3 Expansion valve The thermostatic expansion valve is set up to control the
superheat between 5°C and 7°C.
4 Low-pressure switch This switch acts as a circuit safety.
■ Standard setting: OFF = 1.2 bar ± 0.2
■ Standard setting: ON = 2 bar ± 0.3
■ ZL/ZH setting: OFF = 0.5 bar ± 0.2
■ ZL/ZH setting: ON = 1.5 bar ± 0.3
5 High-pressure switch This switch acts as a circuit safety.
■ Standard setting: OFF = 30.9 bar +0/-1
■ Standard setting: ON = 21.6 bar ± 0.1
6 Strainer This strainer prevents dirt particles from entering the expansion
valve.
7 Water in- and outlet
connections The water in- and outlet connections are made of galvanized
steel pipe (British Standard Pipe - BSP). The pipes are not
insulated.
If copper field piping is used for the water circuit, then precau-
tion should be taken to prevent electrolytic corrosion.
8 Low-pressure
service port The low-pressure service port is used to connect a
low-pressure gauge.
9 High-pressure
service port The high-pressure service port is used to connect a
high-pressure gauge.
10 Water temperature
sensor The water temperature sensors are used to control the
thermostat function at the heat exchanger inlet.
11 Freeze-up sensor This protection device shuts down the circuit when the tempera-
ture of the chilled water becomes too low in order to prevent the
water from freezing during operation.