ESIE11-02 Piping Layout
Part 1 – System Outline 1–65
3
1
4
5
Symbols The table below describes the symbols.
Components
refrigeration side
The table below describes the main components of the refrigeration circuit on the refrigeration side.
Symbol Description Symbol Description
R3T Inlet water temperature sensor M*F Condensor fan
R4T Outlet water temperature sensor M*C Compressor
R6T Ambient temperature sensor Check valve
R7-8T Coil temperature sensor Flare connection
S*HP High-pressure switch Screw connection
S*LP Low-pressure switch Flange connection
S*T Discharge temperature controller Pinched pipe
YRV* 4-way valve Spinned pipe
No. Component Function / remark
1 Compressor A hermetically sealed scroll compressor.
2 Water-heat exchanger
(evaporator)
The water-heat exchanger is of the brazed plate-heat
exchanger type.
3 Air-heat exchanger
(condensor)
The air-heat exchanger is of the cross fin coil type. Hi-X-tubes
and PE coated waffle louvre fins are used. The air is discharged
upwards.
4 Fan Direct driven single or two speed motor.
5 Expansion valve The thermostatic expansion valve is set up to control the
superheat between 5°C and 7°C.
6 Low-pressure switch This switch acts as a circuit safety.
■ Standard setting: OFF = 2 bar ± 0.3
■ Standard setting: ON = 0.2 bar ± 0.2
■ Glycol application setting: OFF = 1.5 bar ± 0.3
■ Glycol application setting: ON = 0.5 bar ± 0.2
7 High-pressure switch This switch acts as a circuit safety.
■ Standard setting: OFF = 21.6 bar +0/-1
■ Standard setting: ON = 30.9 bar +0/-1
8 Strainer
Bi-flow
This strainer prevents dirt particles from entering the expansion
valve. The type of this strainer is a bi-flow strainer.
9 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.
10 Low-pressure
service port
The low-pressure service port is used to connect a
low-pressure gauge.
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