Emerson VSR Manuel D’Utilisation

51

Operation

4.  Manually open the oil isolating valve at the oil 

separator outlet connection.

5.  Open the isolating valve(s) before and after the 

oil filter housings.

6.  Manually open the stop valve on the oil bleed 

return line from the element section and open 
the expansion valve 1/2 of a turn.

 

7.   Open 1/4” high pressure gas line valve piped to 

oil injection line just enough to quiet compres-
sor at 100% capacity.

C. Compressor Pre Start-Up Check  List

Before proceeding with actual starting of the 
compressor, the items listed on the “Pre Start-Up 
Check List” must be verified.  Time and money will 
be saved before the Vilter start-up technician ar-
rives.  (See next page.)

3. Suction Pressure

Low suction pressure cutout stops the compres-
sor unit when the suction pressure drops below 
the setpoint.

4. Oil Filter Differential

High oil filter differential cutout stops the com-
pressor unit when the difference between the 
outlet and inlet of the filter exceeds the setpoint.

5. Oil Temperature

The oil temperature cutout stops the compres-
sor unit when the oil temperature is too high 
or too low.

6. Discharge Temperature

The high discharge temperature cutout stops 
the compressor unit when the discharge tem-
perature exceeds the setpoint.

INITIAL START-UP

A. Setting of Controls

(Refer to the appropriate microprocessor manual  
for a list of initial settings.)

B. Valve Settings

1.  The suction line uses separate stop and check 

valves. Ensure the suction stop valve is open 
prior to starting.

2.  The ¼” suction equalization valve should be 

closed during operation.  The valve enables the 
unit to slowly equalize to low side pressure dur-
ing off periods. This valve must be adjusted to 
minimize oil loss when compressor stops.

3.  The discharge line uses separate stop and check 

valves.  Ensure the discharge valve is open prior 
to starting.