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21 2008SSD-34 (5/08)
Dual-Compressor Module Maintenance
4.3 Checking the Oil Level
The proper oil level varies according to the Compressor Module’s operating speed. To check the oil level
on the fi rst-stage oil separator level gauge, use the following guidelines based on operating speed.
NOTE - THIS PROCEDURE REFERS TO COMPRESSOR MODULES WITH A SIGHT TUBE.
FOR DUAL-SIGHT GLASS SEPARATORS, CONSULT THE FACTORY.
The oil level indicated on the fi rst-stage oil separator sight tube varies with inlet and discharge
pressures as well as operating speed. Check the oil level when the compressor is running.
4.3.1 Oil Level Guidelines - Minimum Speed
When operating the Compressor Module at minimum speed—2400 rpm, 40 Hz—
check the oil level in the oil level sight tube, shown at right, then refer to the
following suggested maintenance actions.
If the oil level is: Take this action:
• 1"– 3" from the bottom
of the oil level gauge
No action is required.
• Lower than 1” from the bottom Add factory-supplied PAO oil to this
level (see 4.5.1 - Topping Off the Oil
Level on page 22).
• Higher than 3” from the bottom Remove excess oil
(see 4.5.2 - Changing the Oil on
page 23).
4.3.2 Oil Level Guidelines - Maximum Speed
When operating the Compressor Module at maximum speed—4800 rpm, 80 Hz—
check the oil level in the oil level sight tube, shown at right, then refer to the
following suggested maintenance actions.
If the oil level is: Take this action:
• 1"– 3" from the top of the oil
level gauge
No action is required.
• Lower than 3” from the top Add factory-supplied PAO oil to this
level (see 4.5.1 - Topping Off the Oil
Level on page 22).
• Higher than 1" from the top Remove excess oil
(see 4.5.2 - Changing the Oil on
page 23).
4.4 Oil Capacity and Type
The factory oil charge of the SZO Compressor Module is 380 fl uid ounces (11.25 liters).
Use the special Poly-Alpha-Olefi n (PAO) blend available from the Packager. Refer to Appendix A -
Material Data Safety Sheet on page 32 for details.
CAUTION
The Compressor Module REQUIRES a special PAO blend available from your Packager.
Do NOT substitute other types of oil. Using other types of oil will damage the equipment and void
the warranty.
Oil level
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