Be aware that certain components such as the refrigerant compressor and the discharge pipe can become
quite hot (up to 110 °C - 230 °F). Therefore, wait until the dryer has cooled down before removing the
panels.
Before starting any maintenance or repair work, switch off the voltage and close the air inlet and outlet
valves.
Local legislation
Local legislation may stipulate that:
• Work on the refrigerant circuit of the cooling dryer or on any equipment which influences its function
must be undertaken by an authorised control body.
• The installation should be checked once a year by an authorised control body.
7.8 Safety valves
Location of safety valve
Testing
The safety valve (SV) test can only be performed by authorized personnel and is
protected by a security code.
Refer to Elektronikon® Graphic controller, Test menu
If the safety valve does not open at the set pressure stamped on the valve, it needs to be replaced.
Warning
No adjustments are allowed. Never run the compressor without safety valve.
7.9 DD/PD filters service intervals
For DD/PD filters, the following service intervals should be observed:
Instruction book
2920 7109 23 111
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