Draining the oil from the thermostatic valve
A drain plug is provided to drain oil from the thermostatic valve. If the machine is connected to an
external heat recovery system, oil should also be drained from the heat exchanger at a suitable
point.
Precondition The external heat recover system is de-pressurised.
Fig. 30 Changing the cooling oil, heat recovery system
2 Thermostatic valve
3 Screw plug
1. Prepare a cooling oil receptacle.
2. Remove the drain plug 3 and allow the oil to drain completely.
3. Replace the plug 3 .
➤ Dispose of used oil in accordance with environment protection regulations.
Filling with cooling oil
1. WARNING!
Compressed air!
Compressed air and components under pressure can injure or cause death if the contained
energy is suddenly released.
➤ Fully vent all pressurised components and enclosures.
2. Slowly unscrew the filler plug 4 (see illustration 28).
3. Fill with cooling oil.
4. Check the filler plug and ring seal for damage and screw the plug back in again.
Starting the machine and performing a trial run
1. Close all access doors, replace and secure all removable panels.
2. Open the user's shut-off valve between the machine and the air distribution network.
3. Switch on the electrical power supply via the power supply isolating device and reset the main‐
tenance interval counter.
4. Start the machine and check the oil level again after about 10 minutes, topping up if necessary.
5. Switch off the machine and check for leaks.
10 Maintenance
10.16 Changing the cooling oil
901848 21 E
Operating Manual Rotary screw compressor
SK
73
Option W1
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