Monitoring; Fluid Compatibility - HYDAC International OK-EL Installations- Betriebs Und Wartungshandbuch

9. MONITORING

Check the specified temperatures of the fluid after commissioning.
If these values are not stable and the system reaches excessive
temperatures, please check the following:
z Fan direction of rotation (fan rpm if possible)
z Electrical connections
z Thermostats and pressure bypass valves
z Cooling air flow and direction (if possible)
z Fluid flow rate
z I/O temperatures of fluid and air
z Cleanliness of the cooling element surfaces
z Maximum pressure of the system

10. FLUID COMPATIBILITY

OIL
Mineral: HL / HLP / HLVP according to DIN 51524
Synthetic: MIL-H, SKYDROL, EHC according to CETOP RP 77H
High viscosity: HFD
Ecological: HETG / HEPG / HEE according to CETOP RP 77H
Phosphate ester: HFD-R, HFD-U according to CETOP RP 77H
WATER
Oil-water: HFA according to CETOP RP 77H
Water-oil: HFB according to CETOP RP 77H
Water / glycol: HFC according to CETOP RP 77H
ATTENTION
For all other fluids please contact our Technical Department.
For coolers equipped with pump and pump & filter respectively
ACA, ACAF, OKA, OKAF, SCA, SCAF, OSCA, OSCAF, please contact
the Technical Department before using the above-mentioned fluids.
ATTENTION
For all mixture percentages HFA, HFB, HFC
please contact our Technical Department.
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