Chicago Pneumatic CPVS 50 User Manual download pdf (Page 22)

Chicago Pneumatic Compressors

62 305 258 65

01/2008

Page 22

D - Oil and air cooler

The aluminium oil and air cooler is a vital part in the CPVS system.

Please take care of this element. To prevent the nest of tubes from

being deformed or damaged, when assembling or disassembling

the radiator unions and hoses, the radiator sleeves' must be kept

rotating by means of a wrench. The outer surface of the nest of

tubes must always be kept clean in order to enable proper heat

transfer. In the event of a leak, the source of the leak must be

detected. In order to do this:

- Stop the CPVS.

- Clean the greasy areas.

- Look for leaks using conventional means (soap solution, …).

Pressurized shutdown retains the pressure in the machine circuit

for a few moments so that any leak can be more easily located.

E - Oil separator (see B Section 1)

The oil separator's lifespan depends on the cleanliness of the air

coming into the compressor, on regular oil filter changes, on the qua-

lity of the oil used, on the attention with which the oil tank condensate

drains are carried out and on the ambient temperature of the room.

(see notice on the electronic plate for resetting the time).

Check the cleanliness of the pipe that returns the oil to be aspired

(transparent) to prevent the injector from becoming blocked and

to ensure that the oil recovered can pass through easily.

Excessive oil consumption

The presence of excess oil in the discharge air, a rapid drop in

level show a probable deterioration in the oil separator that must

be changed.

The unit must first be checked to make sure that there is no oil

loss and that the oil return is working properly.

Changing the oil separator

Dismantle all the piping connected to the tank's upper flange (air

discharge, regulation system supply, and oil return). Undo the

screws that hold the tank cover and remove it.

- If the old oil separator musty be remounted, use new seals.

- Be very careful during installation of the oil separator so as to

avoid possible damage.

- The new oil separator is delivered with its two seals on either

side of the flange.

- Slight undulations in the flange will flatten out when the screws

are tightened.

- Apply a 6 mkg torque.

- Replace the oil return tube correctly so it touches the bottom of

the oil separator.

F - Oil return pipe (see fig. 20)

Placed under the compressor

• Dismantle the body of the anti-oil return pipe.

• Lift the anti-oil return pipe.

• Check the state of the o-ring (rep. 64).

• Reassemble.

Fig. 20 - Oil return pipe

G - Draining condensation water

(see B Section 1)

Condensation water prevents proper lubrication. The resulting

substantial wear leads to a reduction in the lifespan of the CPVS. It is

therefore essential to drain condensation water.

Draining of condensates in the oil circuit (see fig. 19) :

Draining will only take place at least 12 hours after the CPVS has

been shut down. It can be carried out for example on the morning

of the start-up.

To do this :

- Slowly open the oil change tap and let the water escape.

- When the oil appears, close the valve immediately to avoid any

loss.

- Refill with oil if necessary.

H - Temperature safety tests

(See instructions electronic board).

IF THE SENSOR IS NOT WORKING, IT MUST BE

CHANGED.

I - Refastening electric connections

A loosening of the electric power cables leads to the contactors

ove-rheating which can lead to their destruction.

Periodic refastening is therefore necessary at the star and triangle

line contactor arrivals and departures. (see Maintenance Table).

All electric power supply to the machine must be cut off before

opening the electric cabinet.

J - Decommissioning the compressor at

the end of its useful life (see B Section 1)

1. Stop the compressor and close the air outlet valve.

2. Unplug the compressor from the electric supply.

3. Decompress the compressor : unplug the 4/6 piping on the

oil separator cover.

4. Close and decompress the section of the air network which

is linked to the exit valve. Disconnect from the compressed

air exit pipe from the air network.

5. Empty the circuits of oil and condensates.

6. Disconnect the compressor condensate piping from the

condensate draining system.

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Chicago Pneumatic CPVS 50 User Manual Page 22

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