GEA Grasso DX 600, Информация о продукте

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PRODUCT INFORMATION
LIQUID CHILLER GRASSO DX R
200 ... 1600
8 _601011_pi_dxr_gbr_1_.doc
1 FUNCTION AND DESIGN
Introduction
The Ammonia Liquid Chillers (ALC) Programme for dry evaporation (DX) provides for proven components as
complete refrigeration systems for medium and large refrigeration and/or air conditioning needs.
Generally, these refrigeration systems use ammonia as refrigerant which is characterized by a high regrigeration
capacity, low energy consumption and a beneficial price and which is completely neutral towards the
environment.
Equipped with the Grasso screw compressor series, the DX chiller range covers the refrigeration range of 200 to
1600 kW for cold water.
The performance ranges are determined by 12 type sizes of the screw compressor series
The hole DX chiller programme consists of 3 series with different condenser types working according to principle
of dry evaporation.
Ammonia liquid chillers for dry evaporation (DX chiller) consists of the following main components:
1. Drive-line (screw compressor, driving motor, oil separator)
2. Evaporator with basic frame, carrying the drive-line
3. Condenser, alternative
— built on shell and tube type
— external evaporative condenser or air cooled condenser
4. Low-voltage supply with control unit
DX chiller can be delivered in version RR for complete capacity range of model types 200 - 1600 as standard ready
for connecting, complete with pipes and wiring.
The complete combination of drive line and evaporator can be delivered for versions LR and VR, so that the
condenser only have to connect on site.
The DX chillers are designed according to the 3 different concepts of Grasso screw compressors.
Because of that compact designed DX chiller carried out.
The standard model types valid for the named conditions (see overview - cold water 12°C/ 6°C and cooling water
26°C/ 32°C).
Each model size can be delivered with exact adapted evaporators and condensers deviating of standard as well as
with different secondary refrigerants and cooling mediums.
These special models require changes concerning the standard dimensions.
You'll find defined power parameters as selection tables in this product information. These table values serve for a
first model type selection. For the concrete application field the values have to confirm by Grasso.
Ammonia liquid chiller DX types are eqipped with a standard PLC (control device).
A background illumination LCD display allows reading of all operating and fault messages as well as process variables.
The display is operated via a robust keypad having 6 function and 24 system keys..
Each DX chiller can optionally be equipped with an absorption device for additional safety in case of havary.
The use of the absorption facility depends upon the installation conditions of the DX chiller and the design of the
machine room and ought to be checked in each individual case taking into account the relevant provisions.
The DX chillers are delivered with a dry nitrogen charge (0.5 bar g.p.).
Refrigerant and special refrigeration oil are included in scope of supply.
A user manual with description of refrigeration circuit, and instructions for commissioning, operating and
maintenance are belonging to each DX chiller supply.
For detailed informations regarding screw compressors see separate product informations.