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MAINTENANCE
Periodic maintenance is necessary to keep all components func-
tioning as designed. A maintenance log is recommended to ensure
a proper maintenance schedule is followed.
Pumpout Compressor Oil Charge
Use oil conforming to Carrier specifications for centrifugal or
screw compressor use. Oil requirements are listed in Table 6.
Monitor and adjust compressor oil level as often as necessary.
When replacing lost oil, add the same type of oil that is used in the
chiller being pumped out.
Table 6 — Pumpout Compressor Requirements
REFRIGERANT
VISCOSITY
R-513A
The pumpout oil separator comes pre-charged with 13 oz of ISO
viscosity 220 POE (Polyol Ester) oil. The pumpout compressor is
approved for use with ISO viscosity 220 POE oil or ISO viscosity
68 POE oil. The pumpout compressor is also factory precharged
with POE oil.
Oil should be visible in the pumpout compressor sight glass both
during operation and at shutdown. Always check the oil level be-
fore operating the pumpout compressor.
Oil can be added to the 1/4-in. SAE flare access valve port running
from the top of the oil separator to the compressor while the com-
pressor is running. Be careful not to overfill.
NOTE: Compressor access valve has a self-sealing fitting which
will require a hose connection with a depressor to open.
To change or remove oil, the compressor will have to be removed
from the assembly. Compressor can be disconnected from con-
nected tubing by the quick connect fittings at suction and dis-
charge and oil recovery line.
Prior to removal, close service valves 2, 3, 4, and 5, and run the
pumpout compressor in AUTOMATIC until the vacuum switch is
satisfied and the compressor shuts off. Move pumpout selector
switch to OFF, and turn off all power to unit prior to removing
SYMPTOM
Compressor Does Not
Run
Compressor Cycles On
High-Pressure Control
Unit Operates Too Long
System Noises
Compressor Loses Oil
ISO
CARRIER
SPECIFICATION NO.
68
PP47-31
220
PP47-32
Table 8 — Troubleshooting
PROBABLE CAUSE
Main power line open
Loose terminal connection
Improperly wired controls
Low line voltage
Compressor motor defective
Seized compressor
High level gage alarm
High-pressure control erratic in action
Discharge valve partially closed.
Air in system
Condenser scaled.
Condenser water pump or fans not
operating.
Isolation valves partially open
Piping vibrations
Insufficient compressor oil
Leak in system
Plugged or stuck compressor oil return check
valve
Liquid refrigerant carries oil out of
compressor
Motor shutdown on internal thermal protec-
tion high temperature cutout.
compressor unit from pumpout assembly frame and connecting
tubing.
Service valves 2, 3, 4, and 5 remain closed while compressor is re-
moved. Put compressor back in place. Use the torque values listed
in Table 7 for reassembly:
Table 7 — Torque Values for Reassembly
PARAMETER
Suction
Discharge
O-ring Face Seal
Be sure to use backup wrench and pull a deep vacuum in the ser-
viced pumpout tubing prior to any refrigerant exposure. At this
point, confirm that the oil level is satisfactory and put the pumpout
back in service.
Storage Tank
To prevent moisture and contaminants from entering the storage
tank, maintain positive pressure in the tank when not transferring
refrigerant. Leak test the storage tank periodically.
Ordering Replacement Parts
The following information must accompany an order for Carrier
specified parts:
•
machine model number and serial number
•
name, quantity, and part number of the part required
•
delivery address and method of shipment
TROUBLESHOOTING
Information on troubleshooting for the PPS system is included in
Table 8.
Replace fuse or reset circuit breaker.
Check connections.
Check wiring and rewire.
Check line voltage; determine location of voltage drop.
Check motor winding for open or short. Replace compressor if
necessary.
Replace compressor.
Check refrigerant level and remove excess.
Check capillary tube for pinches. Set control as required.
Open valve.
Purge system.
Clean condenser.
Start pump or fans.
Close valves.
Support piping as required. Check for loose pipe connectors.
Add oil.
Locate and repair leak.
Repair or replace valve.
Check to ensure only refrigerant vapor enters compressor suction
line. Add oil as necessary.
High temperature cutout should reset within 120 minutes.
17
VALUES
ft-lb
Nm
80 to 100
109 to 136
50 to 60
68 to 81
7 to 9
10 to 12
REMEDY
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