9 Maintenance
9.1
Warning notes for maintenance
DANGER!
Contact with live or moving parts
Electric shock, impacts, cutting, crushing
The device must be disconnected from the mains power
supply before any kind of maintenance is performed.
Only skilled personnel are permitted to perform repairs.
CAUTION!
Contact with hot or cold device parts, accessories and heat
transfer liquid
Scalding, hot or cold burns
Allow device parts, accessories and heat transfer liquid to
reach room temperature before touching.
Protective equipment:
n
Safety glasses
n
Protective gloves
n
Protective work clothing
9.2 Maintenance intervals
The maintenance intervals described in the following table must be observed.
The following compulsory maintenance tasks must be performed before
operating the device for prolonged periods.
Interval
Maintenance work
Weekly
Check that the drain taps are closed and tight. The sealing caps must be present on the drain taps
and tightened.
Monthly
Check the exterior of the device for any damage.
Check the external hoses for material fatigue.
Check the hoses and screw connections for leaks.
Clean the air-cooled condenser.
Clean the filter screen in water-cooled devices.
Check the function of the overtemperature protection.
Check the function of the low-level protection.
Quarterly
Descale the cooling water circuit.
(a shorter interval must be selected, depending on the water hardness and operating period)
Six monthly
Check the heat transfer liquid for usability.
every ten years
Check that the externally installed safety valve is functioning properly.
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Integral Process Thermostats and High-Temperature Thermostats
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