disassembly, please apply the same assembly procedure as described above. Maximum torque: 15
Nm (11.1 lbf.ft) (hand tight plus maximum 2 revolutions).
7.9 Refrigerant dryer maintenance
Danger: The dryer circuit contains refrigerant. When handling refrigerant, all applicable
Safety precautions during maintenance or repair must be observed. Specifically be aware of
following points:
• Contact of liquid refrigerant with the skin can cause freezing. Wear special gloves. If
contacted with the skin, the skin should be rinsed with water. On no account may
clothing be removed.
• Fluid refrigerant can also cause freezing of the eyes. Wear safety glasses.
• Avoid inhalation of refrigerant vapors. Check that the working area is adequately
ventilated.
Danger: Be aware that internal components of the dryer such as the pipes can reach a
temperature of up to 110˚C (230˚F). Therefore, wait until the dryer has cooled down before
removing the side panels.
Danger: Before starting any maintenance or repair work, switch off the voltage and close the
air outlet valve.
Danger: Local legislation may stipulate that:
1. Work on the refrigerant circuit of the cooling dryer or on any equipment which
influences its function must be undertaken by an authorized control body.
2. The installation should be checked once a year by an authorized control body.
General
The following remarks should be kept in mind:
• Keep the dryer clean.
• Brush or blow off the finned surface of condenser regularly.
• Inspect and clean the electronic condensate drain regularly.
1. Functioning of the drain can be checked by pushing the Test button of the drain, consult
section Air dryer.
2. Cleaning of the drain filter can be done by opening the manual drain valve for a few
seconds.
Device settings
The regulating and safety devices are factory adjusted to obtain optimum performance of the dryer.
Do not alter the setting of any of the devices.
Warning:
Connecting pressure measuring devices in the refrigerant circuit can change the
amount of refrigerant in the system. This results in a less optimal working of the dryer.
7.10 Desiccant dryer maintenance
Warning:
Under no circumstances should compressed air be allowed to flow through the
dryer when the electrical power is switched off. This will result in terminal failure of the
desiccant cartridges and regeneration will no longer be possible.
Instruction book
2920 7219 10 71
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