CIAT DYNACIAT LG 080, Instruction Manual

Page: 35 / 68

5 - APPLICATION DATA
Industrial process applications
Certain industrial processes may require high leaving water stability. In these cases the values above must be increased.
It may be necessary to add a buffer water tank to the circuit in order to achieve the required volume. The tank itself must be equipped
with an internal baffle
in order to ensure proper mixing of the liquid (water or brine). See the following examples of an internal baffle to ensure proper
mixing of the liquid (water or brine). Refer to the examples below.
Bad
Bad
Good
Good
5.7 - Maximum water loop volume (evaporator and condenser side)
Units with hydraulic module incorporate an expansion tank sized for the maximum water loop volume. The table below gives the
maximum water loop volume (in litres) for pure water or ethylene glycol with various concentrations.
DYNACIAT LG/LGN 080-130 150-300 360-450 480-600
Static pressure bar 1 2 3 1 2 3 1 2 3 1 2 3
Pure water l 220 150 75 340 225 115 1180 655 281 1376 918 393
10% EG l 165 110 53 255 170 85 896 498 213 1045 697 299
20% EG l 100 70 35 150 100 50 741 412 176 864 576 247
35% EG l 85 55 30 130 85 45 638 354 152 744 496 213
EG : Ethylene glycol
5.8 - Expansion tank
The expansion tank is supplied with a pressure of 1 bar relative (±20%). The maximum operating pressure for the tank is 3 bar for
range LG/LGN 080-300 and 4 bar for range LG 360-600.
5.9 - Protection against cavitation Evaporator pumps option
To ensure the durability of the pumps in the integrated hydraulic modules, the control algorithm of the units incorporates anti-
cavitation protection.
It is therefore necessary to ensure a minimum pump entering pressure of 60 kPa (0.6 bar) during operation and at shut-down. A
pressure below 60 kPa will prohibit unit start-up or cause an alarm with the unit shutting down.
In order to obtain sufficient pressure, it is recommended:
- to pressurise the hydraulic circuit between 100 kPa (1 bar) and 300 kPa (3 bar) maximum on the suction side of the pump,
- to clean the hydraulic circuit before filling with water,
- to regularly clean the screen filter.
EN-35 Dynaciat LG/LGN