Flooded Cooler Units - Carrier AQUAFORCE 30XA080-500 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

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.
7. If none of the previous steps were successful, the unit is
low on oil charge. Add oil to the oil separator using the
1 / in. access fitting that the discharge pressure transducer
4
is mounted to.
NOTE: To facilitate the oil charging process, ensure that
the unit is not running when adding oil. The system is un-
der pressure even when the unit is not running, so it is
necessary to use a suitable pump to add oil to the system.
Using a suitable pump, add
tem. Continue adding oil in
the problem is resolved, up to a maximum of 1.5 gal
(5.7 l). If it is necessary to add factory oil charge levels to
the system contact your local Carrier representative.
Oil Filter Maintenance — Each circuit has one oil filter locat-
ed externally to the compressor. Oil line pressure drop is
monitored by the control. Oil line pressure drop is calculated
by subtracting oil pressure (OP) from discharge pressure (DP).
If the oil line pressure drop exceeds 30 psi (206.8 kPa) for
5 minutes the control will generate a High Oil Filter Pressure
Drop alert. The High Oil Filter Pressure Drop alert will
not shut down the compressor, but instead indicates that the
oil filter is dirty. If oil pressure line losses exceed 50 psi
(344.7 kPa) then the control will shut down the circuit on
Maximum Oil Filter Differential Pressure Failure.
ACCESS
FITTING
Unloader Piston
Chamber
High with
High
text
Pressure
Discharge
Oil
Port
Bleed Line to Low Pressure Suction
High Pressure Oil
Energized Energized
NO FLOW FLOW
Valve #2 (NO) Valve #1 (NC)
FULLY LOADED OPERATION
1 / gal (1.9 l) of oil to the sys-
2
/ gal (1.9 l) increments until
1
2
OIL PRESSURE
TRANSDUCER
LOCATION
DISCHARGE
GAS THERMISTOR
HIGH PRESSURE
SWITCH
SOLENOID 2
Unloader Piston
Compression Chamber
Process
Slide Valve
Loaded Position Loaded Position
De-energized De-energized
FLOW NO FLOW
Valve #2 (NO) Valve #1 (NC)
FULLY UNLOADED OPERATION
Fig. 49 — Typical 06T Compressor (All Units)
Compressor oil is pressurized. Use proper safety precau-
tions when relieving pressure.
Replacing the Oil Filter — Close the oil line ball valve locat-
ed in front of the oil filter. Connect a charging hose to the
access fitting port located downstream of the valve and bleed
off oil trapped between the service valve and the oil solenoid
valve. A quart of oil is typically what is removed during this
process. Remove the charging hose. Unscrew the nuts from
both ends of the oil filter and remove the oil filter. Remove the
protective caps from the new oil filter and install, being careful
not to lose or damage the new O-ring located on the new oil fil-
ter. Draw a vacuum at the Schrader port. Remove the charging
hose and open the oil line ball valve. Check both fittings for
leaks.

Flooded Cooler Units

FLOODED COOLER
VALVE — The suction service valve is a factory-installed op-
tion for 30XA units. It is located in the suction outlet of the
cooler. The suction service valve is bolted between the cooler
outlet and the suction flange piping. The suction service valve
shaft has a locking device located on the shaft to lock the valve
in either a fully open position or a fully closed position. The
locking device must be pulled out prior to moving the valve
handle to a fully open or a fully closed position. See Fig. 51A
and 51B.
SUCTION
TEMPERATURE
SOLENOID 1
Unloader Piston
Compression
Process
Trapped
Discharge
Port
Oil at
text
High
Slide Valve
l
Pressure
Unloaded Position
Bleed Line to Low Pressure Suction
High Pressure Oil
79
CAUTION
UNIT SUCTION
MOTOR TEMPERATURE
SENSOR 1
COMMON
MOTOR TEMPERATURE
SENSOR 2
Chamber
Compression
text
Slide Valve
Slide Valve
Discharge
Port
Part Load Position
Bleed Line to Low Pressure Suction
High Pressure Oil
Energized De-energized
NO FLOW NO FLOW
Valve #2 (NO) Valve #1 (NC)
MAINTAIN POSITION
1 / -in.
4
SERVICE
Process
a30-4469