Specifications

68
COMPRESSOR OIL SYSTEM — Each compressor/circuit
has its own oil system which includes an oil filter, oil solenoid,
check valve, oil level switch, oil pressure transducer, and an oil
shut-off valve. A typical oil system is shown in Fig. 52. See
Table 42.
Table 42 — Unit Oil Quantities
Oil Charge
— When additional oil or a complete charge is
required it must meet the following specifications:
• Manufacturer . . . . . . . . . . . . . . . . . . . . . Emkarate RL220XL
• Oil Type . . . . . . . . . . . . . . . . . . . Inhibited polyolester-based
synthetic compressor lubricant for use with screw compressors.
• ISO Viscosity Grade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Do not reuse drained oil or any oil that has been exposed to
the atmosphere.
Oil is available in the quantities shown in Table 43 from
your local Carrier representative.
Table 43 — Oil Part No. Information
If unsure if there is low oil charge in the system, follow the
steps below:
1. If the unit shuts off repeatedly from a low oil level alert it
may be an indication of inadequate oil charge; however, it
could also indicate that the oil is not being recovered from
the low-side of the system.
2. Begin running the unit at full load for 1
1
/
2
hours. Use the
manual Test Mode feature of Service Test if the unit does
not normally run at full load.
NOTE: An adequate load must be available.
3. After running the unit for 1
1
/
2
hours at full load, allow the
unit to restart and run normally. If low oil alarms persist,
continue with the following steps.
4. Close the liquid line service valve and place a pressure
gage on top of the cooler. Enable the Service Test feature
and turn the Enable/Off/Remote switch to the enable po-
sition. Start the desired circuit by turning it on under the
TEST function: CP.A for compressor A, CP.B for com-
pressor B, or CP.C for compressor C.
5. When the compressor starts successfully observe the
cooler pressure when the pressure reads 10 psig
(68.9 kPa), turn the Emergency Switch (SW2) to the OFF
position. The compressor should stop.
6. Open the liquid line service valve and allow the unit to
restart normally. If low oil level alarms persist, continue
with the following steps.
CLOSED
OPEN
CLOSED
OPEN
GASKET
OPEN VALVE IN QUICK TEST SUB-MODE BEFORE DISASSEMBLING
EF05BD271 NV 32.5mm
EF05BD331 NV 36mm
50Nm (36 ft-lb)+ 30°
27mm / 1
1
/
16
''
27mm / 1
1
/
16
''
DISASSEMBLY
ASSEMBLY
NOTES:
1. Push down on valve piston to close valve before assembling.
2. After valve is assembled close valve in Quick Test sub-mode or cycle power before opening service valve.
Fig. 50 — Disassembly and Assembly of EXV Motor
NOTE: Open valve in Quick Test sub-mode before disassembling.
A30-4072ef
30XW UNIT SIZE
OIL CHANGE (gal, [liters])
Circuit A Circuit B
150-200 6.0 [22.7] —
250-300 8.0 [30.3] —
325-400 6.0 [22.7] 6.0 [22.7]
QUANTITY TOTALINE PART NO.
1 Quart P903-2325
1 Gallon P903-2301
5 Gallon P903-2305