Schneider Airsystems CPM 310-10-20 W, Original Operating Manual

II/10

UNM / CPM

GB

3. Disassemble vessel of FDM. Unscrew the

mounting screw of the filter insert by

screwing anticlockwise (Fig. 4a).

4. Remove the filter insert, clean in soapy

water (max. 50 °C).

5. Installation is in reverse order.

2.6.4 Draining condensate from FDM
Draining semi-automatically: 

Rotate the

condensate drain valve 1/4 turn anticlock-

wise. Under 1 bar: condensate drains. (Fig-

ure 4a)

Draining manually: 

Rotate the condensate

drain valve clockwise and push it up. Con-

densate drains.

2.6.5 Draining condensate from pres-

sure vessel

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Dispose of condensate in accordance with

local specifications!

Caution:

 Wear safety glasses!

1. Place a suitable vessel under the conden-

sate drain.

2. In order to drain condensate, the vessel

pressure must be 2 - 3 bar.

3. Open condensate drain valve (item  09).
4. Close condensate drain valve again fol-

lowing condensate drainage.

2.6.6 Checking the oil level

• The oil level must be between the top and

bottom marks (oil dipstick/oil inspection

glass) (Figure 7a).

• Correct if necessary.

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If oil is milky, it must be changed imme-

diately.

2.6.7 Changing/adding oil

1. Allow the compressor to warm up, switch

it off, disconnect the power supply.

2. Pull out the oil filler plug/oil dipstick

(item 03), hold the used oil container un-

der the oil filler plug (item 04), screw

open the oil drain screw, drain used oil

completely.

3. Screw the oil drain screw closed.
4. Add the prescribed quantity of oil.
5. Check the oil level, correct if necessary.

Insert the oil filler plug or oil dipstick.

6. Dispose of used oil according to applica-

ble regulations.

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Recommendation: mineral oil Art. No.

B111002, synthetic oil Art. No. B111006.

No guarantee can be provided if the

wrong oils are used.

Do 

not 

mix synthetic and mineral oil:

compressor damage is possible!

2.6.8 Check screw fittings

1. Check all screw connections for tight fit

and retighten if necessary.

2. Observe the tightening torques (tighten-

ing torques calculated according to VDI

2230).

2.6.9 Cleaning the intake filter

1. Unscrew the intake filter. (Fig. 5a)
2. Clean the filter insert using the blow gun,

exchange the filter insert if necessary.

3. Screw the intake filter back on.

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Do not purge the intake opening. No for-

eign objects may enter.

Never operate the compressor without an

intake filter.

2.6.10 Checking, adjusting the V-belt 

tension

V-belt driven compressors:
1. Switch off the compressor. Disconnect

the power supply.

Checking V-belt tension:

Using a suitable blunt tool (spanner wrench),

press V-belt at top centrally and downwards

between V-belt discs. It may not give more

the width of the V-belt (Figure 8a).

Adjusting V-belt tension:

1. Remove outer belt guard grating.
2. Mark the position of the electric motor on

the base plate.

3. Unscrew the mounting screws of the mo-

tor (Figure 8b).

4. Move the motor towards the compressor

unit. Take off the V-belt.

5. Push the motor approx. 2 mm parallel

past the mark. Tighten the mounting

screws.

6. Fit the V-belt over the small V-belt disc

first, then stretch it over the large V-belt

disc.

7. Check the V-belt tension and repeat the

process if necessary.

8. Install outer belt guard grating.

2.6.11 Cleaning/replacing the check 

valve

1. Unscrew the locking screw (Figure 6a).
2. Clean insert, replace in case of damage,