Oil Specification; Oil Changes; Refrigerant Filter; Oil Reclaim Filter - Carrier 17 Start Up & Operation Manual

4. Rotate filter nut (Item 4) counterclockwise to remove
filter housing. Keep the filter housing upright to avoid
oil spill.
5. Drain the oil; remove and replace filter cartridges. Do
not use any of the extra felt washers supplied with the
filters.
6. Bench assemble Items A-D upside down. Then slide fil-
ter housing (Item 5) over the stack to ensure that spring
(Item D) is centered in the bottom of the filter housing
as indicated.
7. Evacuate air from the filter assembly. Open the isolation
valve.
8. Turn on oil heater and warm the oil to 140 to 150 F
(60 to 66 C). Operate the oil pump for 2 minutes. Add
oil if required to keep level up to lower sight glass.
Oil should be visible in the reservoir sight glass during
all operating and shutdown conditions.
Oil Specification —
If oil is to be added, it must meet
the following Carrier specifications:
• Oil Type for units using HFC-134a . . . . . . . . . Inhibited
polyol ester-based synthetic compressor
oil formatted for use with HCFC
• ISO Viscosity Grade . . . . . . . . . . . . . . . . . . . . . . . . . . 68
The polyolester-based oil may be ordered from your local
Carrier representative (Carrier Part No. PP23BZ103).
Oil Changes —
Carrier recommends changing the oil
after the first year of operation and every three to five years
thereafter as a minimum along with a yearly oil analysis.
However, if a continuous oil monitoring system is function-
ing and a yearly oil analysis is performed, time between oil
changes can be extended.
TO CHANGE THE OIL
1. Open the control and oil heater circuit breaker.
2. Drain the oil reservoir by opening the oil charging valve,
(Fig. 2, Item 18 or Fig. 3, Item 26). Slowly open the valve
against refrigerant pressure.
3. Change the oil filter at this time. See Changing Oil Filter
section.
4. Change the refrigerant filter at this time, see the next sec-
tion, Refrigerant Filter.
5. Charge the machine with oil. The EX uses approximately
15 gallons (57 L), for EX and FA (size 421-469) style
compressors; 20 gallons (76 L) for FA (size 531-599) style
compressors in order to bring the level to the middle of
the upper sight glass (Fig. 2, Item 17 and Fig. 3, Item 17).
Turn on the power to the oil heater and let the PIC warm
it up to at least 140 F (60 C). Operate the oil pump manu-
ally, through the Control Test, for 2 minutes. The oil level
should be between the lower sight glass and one-half full
in the upper sight glass for shutdown conditions.
Refrigerant Filter —
compressor, a replaceable core refrigerant filter drier is lo-
cated on the refrigerant cooling line to the motor (Fig. 3,
Item 29). On FA style machines, the refrigerant filter is lo-
cated behind the compressor. The filter core should be changed
once a year, or more often if filter condition indicates a need
for more frequent replacement. Change the filter with the
and HFC, gear-driven, hermetic
compressors.
On hermetic machines with EX
machine pressure at 0 psig (0 kPa) by transferring the re-
frigerant to the utility vessel. A moisture indicating sight glass
is located beyond this filter to indicate the volume and mois-
ture in the refrigerant. If the dry-eye indicates moisture, lo-
cate the source of water immediately by performing a thor-
ough leak check.
Oil Reclaim Filter —
ter on the cooler scavenging line. Replace this filter once per
year, or more often if filter condition indicates a need for
more frequent replacement. Change this filter with the cooler/
condenser/compressor vessel at 0 psig (0 kPa) by transfer-
ring the refrigerant charge to the utility vessel.
Inspect Refrigerant Float System —
spection once every 5 years or when the utility vessel is opened
for service. Transfer the refrigerant into the cooler vessel, or
into a storage tank. There are two floats on the 17/19EX, one
on each side of the utility vessel. Remove the float access
covers. Clean the chambers and valve assembly thoroughly.
Be sure that the valves move freely. Make sure that all open-
ings are free of obstructions. Examine the cover gaskets and
replace if necessary. See Fig. 45 for a view of both floats.
Inspect Relief Valves and Piping —
on this machine protect the system against the potentially
dangerous effects of overpressure. To ensure against damage
to the equipment and possible injury to personnel, these de-
vices must be kept in peak operating condition.
As a minimum, the following maintenance is required.
1. At least once a year, disconnect the vent piping at the
valve outlet and carefully inspect the valve body and mecha-
nism for any evidence of internal corrosion or rust, dirt,
scale, leakage, etc.
2. If corrosion or foreign material is found, do not attempt
to repair or recondition. Replace the valve.
3. If the machine is installed in a corrosive atmosphere or
the relief valves are vented into a corrosive atmosphere,
make valve inspections at more frequent intervals.

Coupling Maintenance (Open-Drive Machines)

—
Proper maintenance of the coupling is important since
the coupling supports the outboard end of the compressor
low speed shaft. Only the compressor end of the coupling
has gear teeth and these are manufactured with special tol-
erances for this application.
PROCEDURE — Clean and inspect the gear teeth in the
compressor end coupling for wear yearly. If the teeth are worn,
replace the tapered coupling hub, sleeve and O-ring. Repack
the gear teeth and spacer with 8 oz. of Kop-Flex KHP
high performance coupling grease (Carrier Part No. 17DK
680 001). Install new gaskets.
When the coupling assembly is removed for scheduled serv-
ice of the carbon seal, replace the O-ring, spacer gaskets,
and hex bolts.
Operating conditions such as high temperatures or severe
environments may require more frequent inspection and
relubrication.
Misalignment causes undue noise and wear. Check align-
ment yearly, or more often if vibration or heating occur. Re-
fer to Machine Alignment section, page 70.
Never operate drive without coupling guards in place.
Contact with moving shaft or coupling can cause seri-
ous injury.
77
The oil reclaim system has a fil-
Perform in-
The relief valves