Carrier ComfortLink HXC076 Controls, Start-Up, Operation, Service, And Troubleshooting Download Page 56

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Oil Charging/Low Oil Recharging

OIL SPECIFICATION — If oil is added, it must meet the
following Carrier specifications:
•

Castrol . . . . . . . . . . . . . . . . . . . . . . . . Icematic® SW-220

•

Oil type . . . . . . . . . Inhibited polyolester-based synthetic

compressor lubricant for use in screw compressors.

•

ISO Viscosity Grade . . . . . . . . . . . . . . . . . . . . . . . . . 220

This oil is available in the following quantities from your

local Carrier representative (see Table 36).

Table 36 — Available Oil Quantities

and Part Numbers

Addition of oil charge to 30HX,GXN,GXR systems:

1. If the 30HX,GXN,GXR unit shuts off repeatedly on Low

Oil Level (Alert number 124 or 125), this may be an
indication of inadequate oil charge. It could also mean
simply that oil is in the process of being reclaimed from
the low-side of the system.

2. Begin by running the unit at full load for 1

hours. Use

the Manual Control feature of the software if the unit
does not normally run at full load.

3. After running the unit for 1

hours, allow the unit to

restart and run normally. If the Low Oil Level alarms
persist, continue following this procedure.

4. Close the liquid line service valve, and place a pressure

gage on top of the cooler. Enable the Service Test feature
using the Navigator and turn the EOR switch to Enable.
Start the desired compressor by turning it On under the
‘COMP’ sub-mode. Select item ‘CC.A1’ for compressor
A1, ‘CC.B1’ for compressor B1, etc.

5. Before starting the compressor, the unit will go through

its normal pre-lube pump routine. If there is an insuffi-
cient level of oil in the oil separator, the compressor will
not start, and a pre-start oil pressure alarm will be posted.
Skip to Step 8.

6. If the compressor starts successfully, observe the cooler

pressure gage. When this gage reads approximately
10 psig, turn the selected compressor Off from the
Navigator and move the EOR switch to the Off position.

7. Open the liquid line service valve and allow the unit to

restart and run normally. If the Low Oil Level alarms
persist, continue following this procedure.

8. If none of the previous steps were successful, the unit is

low on oil charge. Add oil to the oil separator using the

-in. Schrader-type fitting on the discharge line entering

the top of the oil separator (30HX units) or through the
Schrader fitting on the top of the oil separator (30GXN,R
units).

9. Make sure that the unit is not running when adding oil, as

this will make the oil charging process easier. Because the
system is under pressure even when the unit is not run-
ning, it will be necessary to use a suitable pump (hand
pump or electric pump) to add oil to the system.

10. Using a suitable pump, add

gal. (1.89 L) of Castrol

Icematic

SW-220 Polyolester oil (absolutely no substi-

tutes are approved) to the system. Make sure that the oil
level safety switch is NOT jumpered, and allow the unit
to restart and run normally. Do not exceed maximum oil
change. See Table 37.

Table 37 — Factory Oil Charges

QUANTITY

TOTALINE PART

NUMBER

RCD PART

NUMBER

1 Quart

P903-1225

—

1 Gallon

P903-1201

PP23BZ104-001