Eco Operation Combined With Liquid Injection (Li) For Additional Cooling - Bitzer ST-610-4 System-Planung Und Ausführung

10 ECO operation combined with liquid injection (LI) for additional cooling

Depending on the operating conditions, even in operations with economiser (ECO) - for example in areas of high
condensing and/or low evaporation temperatures - the use of additional cooling by means of liquid injection (LI)
may be necessary. A relatively simple method is direct liquid injection (LI) into the profile area.
The additional components required include a solenoid valve in the liquid line ( Solenoid valve in the liquid line )
leading to the LI nozzle and a thermostat ( Thermostat for solenoid valve ). The thermostat opens and closes the
solenoid valve as a function of the discharge gas temperature.
The compressors of the CSW65 .. CSW105, CSVW, CSH76 .. CSH96 series have no connection for liquid injection
(LI) for the purpose of additional cooling.
Information
Liquid injection in combination with ammonia as refrigerant only after consulting BITZER!
Fig. 23: ECO operation with liquid injection using a compressor from the CSH series as an example
The ECO connection and LI injection connection on the compressor lead directly to the profile area.
Use only pipelines and system components which are
• clean and dry inside (free from slag, swarf, rust and phosphate coatings) and
• delivered with an air-tight seal.
Depending on their design, compressors are supplied with blanking plates on the pipe connections or shut-off
valves. They must be removed before performing the pressure strength and tightness tests and commissioning the
system.
Information
The blanking plates are only designed to serve as a transport protection. They are not suitable as a separa-
tion between different system sections during the strength pressure test.
ST-610-4 // PDF Download
ON 1 0 C 1 °
TC
OFF 100° C
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