YORK INTERNATIONAL
FORM 160.73-O2 (605)
34
SECTION 7
PREVENTIVE MAINTENANCE
It is the responsibility of the owner to pro vide the nec es -
sary daily, monthly and yearly main te nance re quire ments
of the system.
IM POR TANT – If a unit failure occurs due
to improper maintenance during the war ran ty pe ri od;
YORK will not be liable for costs in curred to re turn the
system to sat is fac to ry op er a tion.
In any operating system it is most im por tant to provide
a planned maintenance and inspection of its func tion ing
parts to keep it op er at ing at its peak effi ciency. There fore,
the following main te nance should be per formed when
pre scribed.
COMPRESSOR
1.
Oil Filter
– When oil pump VSD frequency increases
to 55 hz to maintain target oil pressure.
When the oil fi lter is changed, it should be in spect ed
thoroughly for any aluminum particles which would
indicate possible bearing wear. If alu mi num par ti cles
are found this should be brought to the attention of the
nearest YORK offi ce for their further in ves ti ga tion
and recommendations.
2.
Oil Changing
– The oil in the com pres sor must be
changed annually or earlier if it be comes dark or
cloudy. However, quarterly oil analysis can elim i nate
the need for an annual change provided the analysis
indicates there is no problem with the oil.
COMPRESSOR MOTOR
1. Check motor mounting screws fre quent ly to insure
tightness.
2. Meg motor windings annually to check for de te -
ri o ra tion of windings.
GREASED BEARINGS ON RELIANCE Q5800
MOTORS
Motor Operation and Maintenance manuals are supplied
with the chillers providing maintenance schedules and
instructions for the specifi c motors. The following are
lubrication schedules for the most common motors:
RAW and Toshiba Motor Lubrication
Frame 143T thru 256T are furnished with double sealed
ball bearings, pre-lubricated prior to installation. Grease
fi ttings are not supplied and bearings are designed for
long life under standard conditions.
Frames 284T thru 587UZ are furnished with double
shielded or open ball or roller bearings. It is necessary
to re-lubricate anti-friction bearings periodically.
(See Table 4)
Frame
Size
Standard
8hr/Day
Continuous
24hr Day
Grease
Qty. oz.
143T-256T
*7 Years
*3 Years
*1
284TS - 286TS
210 Days
70 Days
1
324TS - 587USS
150 Days
50 Days
2
* - On frame sizes 143T - 256T, changing bearings at these intervals
is recommended. However, removing the seal, cleaning and refi lling
the bearing and the cavity with recommended grease can re-lubricate
these bearings.
Reliance motors in the 5800 frame size are equipped
en tire ly with grease-lu bri cat ed ball-bear ings. The fol-
low ing out lines the lu bri ca tion re quire ments for these
bearings:
• The motor bearings are properly lu bri cat ed as re-
ceived from YORK. There is no need to add lu bri cant
to the motor bearings at start-up. Too much grease in
the motor bear ing cav i ty may cause ex ces sive bear ing
tem per a ture.
• If the motor has been in storage for 6 months prior
to commissioning, lubricate the motor bearings per
the following instructions prior to start-up.
• If the motor is inactive for 30 days, the motor shaft
is to be rotated 15 revolutions in order to dis trib ute
the grease within the bearing.
• Some bearing squeal may be noted at start-up. This is
often due to the bearing cage, as it vibrates against the
mov ing bearing elements. This noise should sub-side
af ter a few days of operation. In ter mit tent bear-ing
squeal is not cause for alarm.
•
Use only Texaco Premium RB (Code 1939) grease
to lubricate the motor bearings, as in di cat ed in Re-
li ance literature for these mo tors. The grease is readi ly
available throughout most of the world, from Texaco
dis trib u tors – and in Africa, Australia, and the Pa cifi c
Rim coun tries from Caltex dis trib u tors. Oth er types
of grease may be chemically and me chan i cal ly in-
compatible with this Texaco Pre mi um RB grease,
and
are not to be used.
Preventive Maintenance
TABLE 4 –
BEARING LUBRICATION