58 / 134 ECO Gold 09/2021
8.3.2 Servicing intervals
Mandatory for initial operation
and before any longer unsuper-
vised operation, then with rec-
ommended frequency
External condition of device
Inspect the heat transfer liquid
Bath vessel with drain tap
Clean the air-cooled condenser
Cooling thermostat, water-
cooled
Decalcify the cooling water circuit
Cooling thermostat, water-
cooled
Overtemperature protection
Bring the device parts and accessories to room temperature before touching them.
8.3.3 Inspecting the heat transfer liquid
Contaminated or degenerated heat transfer liquid must be renewed.
The heat transfer liquid is to be checked for its usability as required, but at least every six months. Further use of the heat
transfer liquid is only permissible if the inspection indicates this.
The test of the heat transfer liquid takes place according to DIN 51529; ("Testing and assessment of used heat carrier
media"). Source: VDI 3033; DIN 51529.
Critical temperature of the heat transfer liquid
Bring the heat transfer liquid to room temperature for the
analysis.
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