Oil Charging/Low Oil Recharging - Carrier Ecologic 30GX080-265 Controls, Start-Up, Operation, Service, And Troubleshooting

6. When the EXV Percent Open is in the range of 40 to 60%,
check the liquid line sight glass. Slowly add enough ad-
ditional liquid charge to ensure a clear sight glass. This
should be done slowly to avoid over-charging the unit.
7. Verify adequate charge by continuing to run at full load
with 42 to 46 F (5.6 to 7.8 C) cooler leaving fluid tem-
perature. Check that the refrigerant is not flashing in the
liquid-line sight glass. The EXV Percent Open should be
between 40 and 60%. The cooler level indicator should
be in the range of 1.5 to 2.2.
Indication of low charge on a 30HXA, GX systems:
1. Make sure that the circuit is running at a full load con-
dition and all condenser fans are energized and running
at full speed. To check whether circuit A is fully loaded,
enter on the HSIO keypad. The display will read
''CIRCUIT A ANALOG VALUES.'' Using the down ar-
row key on the keypad, scroll down once to ''Total
Capacity.'' If this value is 100%, the circuit is at full load.
To check circuit B, follow the same procedure, but enter
on the keypad.
2. It may be necessary to use the Manual Control feature to
force the circuit into a full-load condition. If this is the
case, see the instructions for using the Manual Control
feature in Table 19 on page 31 of this manual.
3. With the circuit running at full-load, verify that the cooler
leaving fluid temperature is in the range of 38 to 48 F
(5.6 to 7.8 C).
4. For 30HXA chillers, raise the compressor discharge to
approximately 125 F (51.7 C) saturated discharge tem-
perature (185 psig [1276 kPa]). For 30GX chillers, raise
the compressor discharge to approximately 130 F
(54.4 C) saturated discharge temperature (198 psig
[1366 kPa]). Measure the liquid temperature entering the
expansion device for 30HXA units. For 30GX units, mea-
sure the liquid temperature after the tee where all liquid
lines have joined. The liquid temperature should be ap-
proximately 107 F (41.7 C) for optimum charge. If the
temperature is greater than 107 F (41.7 C) and the sight
glass is flashing, the circuit is undercharged.
5. Add 5 lb of liquid charge into the cooler using the
Schrader-type fitting located on the tube entering the bot-
tom of the cooler. This fitting is located between the Elec-
tronic Expansion Valve (EXV) (30HXA076-146 units,
30GX080-090 units), or the economizer (30HXA161-
271 units, 30GX105-176 units) and the cooler.
6. Allow the system to stabilize and then recheck the liquid
temperature. Repeat Step 5 as needed allowing the sys-
tem to stabilize between each charge addition. Slowly add
charge as the sight glass begins to clear to avoid
overcharging.

Oil Charging/Low Oil Recharging

Addition of oil charge to 30HX,GX systems:
1. If the 30HX,GX unit shuts off repeatedly on Low Oil
Level (Alert number 71 or 72), this may be an indica-
tion 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
the Manual Control feature of the software if the unit
does not normally run at full load.
3. After running the unit for 1
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 manual control
feature using the HSIO keypad, and turn the LOR switch
to local. Start the desired compressor by pressing
display.
5. Before starting the compressor, the unit will go through
its normal pre-lube pump routine. If there is an insuf-
ficient 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, press
the LOR 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
1
ing the top of the oil separator (30HX units) or through
the Schrader fitting on the top of the oil separator (30GX
units).
9. Make sure that the unit is not running when adding oil,
as this will make the oil charging process easier. Be-
cause the system is under pressure even when the unit
is not running, 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
Icematic SW-220 Polyolester oil (Carrier Specifica-
1 ⁄ -in.
4
tion number is PP47-32; absolutely no substitutes 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 38.
11. If low oil level problems persist, add another 1.89 L
( 1
increments until the problem is resolved. If it is neces-
sary to add more than 5.75 L (1.5 gallons) of oil to the
system, contact your Carrier distributor service
department.
30GX080-176
30GX205-265
30HXA076-186
30HXC076-186
30HXC206-271
1 ⁄ hours. Use
2
55
1
on the keypad, at the appropriate line on the
on the HSIO keypad, and move
⁄ -in. Schrader-type fitting on the discharge line enter-
4
Do not add oil at any other location as improper
unit operation may result.
⁄ gal.) of oil. Continue adding oil in 1.89 L (
2
Table 38 — Maximum Oil Charges
UNIT CIRCUIT A CIRCUIT A
SIZE (gal) (L)
5.0 18.9
7.0 26.5
5.0 18.9
4.5 17.0
7.5 28.4
⁄ hours, allow the unit to
2
1 ⁄ gal. (1.89 L) of Castrol
2
1 ⁄ gal.)
2
CIRCUIT B CIRCUIT B
(gal) (L)
5.0 18.9
5.0 18.9
5.0 18.9
4.5 17.0
5.0 18.9