Daikin EWYQ230DAYN [97/524] Components water side ewaq ewyq dayn n p b

ESIE06-05 Piping Layout

Part 1 – System Outline 1–85

2.11 Components Water Side : EWAQ- EWYQ- DAYN(N-P-B)

Components water

piping side

The table below describes the main components of the water piping.

1 Flow switch The mechanical flow switch is used to check if there is flow or

enough water flow.

2 Service port The service port can be used to connect a pressure gauge.

3 Drain valve The drain valve can be used to drain water from the water

circuit.

4 Regulating valve The pressure regulating valve is used to regulate the water flow

on the water side (option).

5 Pump The single or double pump circulates the water (depending on

the option).

6 Fill port on the pump The fill port can be used to fill the water circuit.

7 Drain port on the pump The drain port can be used to drain water from the water circuit.

8 Expansion vessel The expansion vessel deals with water expansion, which occurs

when the temperature of the water varies.

9 Pressure gauge Pressure gauge to check the water pressure

10 Air purge To purge the water circuit, to prevent air in the water circuit.

11 Buffer tank This buffer tank is used to store water in order to prevent the

compressor from switching ON/OFF continuously depending on

the load.

12 Filter This strainer prevents dirt particles from entering the evaporator.

A filter with 1mm mesh is used.

13 Shut off valve Makes it possible to shut-off a part of the water piping for

maintenance (e.g. to change a filter).

14 Water circuit safety

valve

The safety valve prevents a too high pressure. Activation above

3 bar.

15 Inlet water sensor R2T The water temperature sensor is used to control the thermostat

function at the heat exchanger inlet.

16 Outlet water sensor

R3T

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 and is also

used to control the thermostat function at the heat exchanger

outlet.