ESIE98–06A Piping Layout
Part 1 – System Outline 1–27
3
1
4
5
1
2.5 Main Parts Refrigeration Circuit EUWY5-30HB/C, EUWA5-30HB/C
with Glycol Application
Main parts The numbers in the table below refer to the numbers in the piping diagrams on the previous pages.
N° Part name Function
1 Compressor All compressors are hermetically sealed scroll types.
2 Air-heat exchanger
(condenser)
The air-heat exchanger is of the cross fin coil type. Hi-X-tubes
and coated waffle louvre fins are used. The air discharge is
upward.
3 Fan All fan motors are direct driven single or two speed motors.
4 Water-heat exchanger
(evaporator)
The water-heat exchanger is of the brazed plate heat exchanger
type.
5 Capillary tubes Used for EUWY5-30H.
Expansion valve Used for EUWA5-30H with glycol application.
6 Pressure control valve The pressure control valve is used in cooling operation to control
the low pressure. The setting is 1.5 bar (±0.2 bar) for
EUWA5-30H with glycol application.
7 High pressure switch The setting is 28 bar.
8 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 for EUWY5-30H and are insulated for EUWA5-30H(Z)
with glycol application.
If Copper field piping is used for the water circuit, then pre-
caution should be taken for electrolytic corrosion.
9 Liquid receiver The liquid receiver is installed to accumulate refrigerant.
10 Service valve The service valve is used for service work like connecting a
manifold.
11 Low pressure service
port
The low pressure service port is used to connect the optional
low pressure gauge.
12 High pressure service
port
The high pressure service port is used to connect the optional
high pressure gauge.
13 4-way valve The 4-way valve is energized during cooling. This is only availa-
ble for EUWY5-30H.
14 Accumulator The accumulator is used to separate the gas from the liquid in
order to prevent the compressor from pumping liquid. This is
only available for EUWY5-30H.
15a Liquid injection valve The valve maintains the discharge temperature of the compres-
sor by cooling with liquid from the condenser. It opens when the
discharge temperature equals 125 °C and closes when the dis-
charge temperature equals 110 °C. This is only available for the
optional glycol application.
15b Thermostat for liquid
injection valve
The thermostat is used to regulate the liquid injection valve
according to the discharge temperature.
To Next Page
Loading...