Carrier 23XL Specifications download pdf (Page 65)

Change the oil after the ﬁrst year of operation. Then, change

the oil at least every three years, or as needed. However, if

a continuous oil monitoring system is present and/or a yearly

oil analysis is performed, the time between oil changes may

be extended. The 23XL Frame 1 and 2 machines use ap-

proximately 4.2 gal (15.9 L) of oil. The 23XL Frame 4 ma-

chines use approximately 10 gal (38 L) of oil. See

Oil Speciﬁcation section on page 66 for additional

information.

This product is hygroscopic. Containers should remain

tightly sealed in a clean and dry environment to prevent

moisture absorption from the air.

FRAME 1 AND 2 MACHINES — The 23XL oil sump can

be isolated to change the oil ﬁlter and oil while the refrig-

erant remains inside the machine. Use the following proce-

dure to change the oil and oil ﬁlter (if required):

IMPORTANT: Remove oil from Frame 1 and 2 ma-

chines before changing the oil ﬁlter. Refer to Fig. 2A

and 3.

1. Make sure the compressor is off and the disconnect for

the compressor is open.

2. Open the control and oil heater circuit breaker in order

to turn off the power to the oil heater.

3. Close the 3 oil sump isolation valves. One isolation valve

is upstream and one isolation valve is downstream of

the oil sump. The third isolation valve is in the oil sump

vent line.

Be sure the power to the oil heater is off when the

oil sump is isolated and full. If the oil heater re-

mains energized, over-pressurization of the oil sump

could result in the failure of the oil solenoid valve,

discharge of hot oil, and personal injury.

4. Connect an oil charging hose to the oil drain valve. See

Fig. 3. Place the other end of the oil charging hose in a

clean container suitable for used oil. A portion of the oil

drained from the sump should be used as an oil sample

and should be sent to a laboratory for proper analysis.

Do not contaminate this sample.

5. Slowly open the drain valve in order to drain the oil from

the sump.

The oil sump is at high pressure. Relieve pressure

slowly.

6. Once the oil has been drained, place absorbent material

under the oil sump to catch any oil that may leak out

once the oil sump cover is opened. Continue with Steps

7, 8, and 9 if a new oil ﬁlter is required. Proceed to Step

10 if no oil ﬁlter change is required.

7. Remove the 6 bolts from the end of the oil sump and

remove the oil sump cover.

8. Remove the oil ﬁlter retaining spring. Remove and prop-

erly discard the oil ﬁlter.

9. Insert a new oil ﬁlter. Seat the ﬁlter retaining spring against

the ﬂange stop. Install the oil sump cover with a new

O-ring. Insert and tighten the 6 bolts that secure the oil

sump cover.

10. Evacuate the oil sump by placing a vacuum pump on

the drain valve. Follow normal evacuation procedures.

Shut off the drain valve when the oil sump has been evacu-

ated. Charge new oil through the drain valve.

11. Add oil (approximately 4.2 gal [15.9 L]) until it can be

seen at the lower edge of the oil sump sight glass.

The oil sight glass will not ﬁll completely since a small

amount of gas will be trapped inside, even under vacuum

conditions.

12. Open all 3 isolation valves (previously closed in

Step 3). Apply power to the controls and oil heater.

13. The oil level will rise once the refrigerant gets absorbed

into the oil.

FRAME 4 MACHINES — Use the following procedures to

change the oil ﬁlter and/or oil on Frame 4 machines. Oil can

remain in Frame 4 machines when changing the oil

ﬁlter. Refer to Fig. 2B and 4.

Changing Oil Filter

1. Make sure the compressor is off and the disconnect for

the compressor starter is open.

2. Close both oil ﬁlter isolation valves. See Fig. 4.

3. Place a container underneath the oil ﬁlter assembly.

4. Slowly open the vent plug, located on top of the oil ﬁlter

housing, to relieve pressure. Do not remove the plug. When

a Schrader valve is provided, use it to relieve the

pressure.

5. Remove the ﬁlter canisters by unscrewing the retainer nut.

The ﬁlter may now be removed and disposed of properly.

6. Install new oil ﬁlter. Install the new O-ring. Tighten the

retainer nut.

7. Partially open the isolation valve located near the oil sepa-

rator. Bleed the excess air from the vent plug. Once

oil starts escaping from the vent plug, close the isolation

valve. Tighten the vent plug on top of the oil ﬁlter

housing.

8. If a Schrader valve is supplied, evacuate the oil ﬁlter by

connecting the vacuum pump to the Schrader valve.

Changing Oil

NOTE: A hand pump or portable electric oil pump will be

required to complete the following operation.

1. Transfer the refrigerant into the condenser (for vessel that

can be isolated) or storage tank.

2. When the machine pressure equals a maximum of 5 psi

(34 kPa), drain the oil by opening the oil charging valve,

located on the bottom of the oil separator.

3. Change the oil ﬁlter as described in the Changing Oil Fil-

ter section for Frame 4 machines.

4. Charge the oil separator with approximately 10 gal

(39 L) of oil. The oil level should be in the center of the

lower sight glass.

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Carrier 23XL Specifications Page 65

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