York YD A, Operating & Maintenance, Page: 49 / 52

JOHNSON CONTROLS
49
FORM 160.69-O2
ISSUE DATE: 9/30/2020
7
SECTION 7 – PREVENTIVE MAINTENANCE
It is the responsibility of the owner to provide the nec-
essary daily, monthly and yearly maintenance require-
ments of the system. IMPORTANT – If a unit failure
occurs due to improper maintenance during the war-
ranty period; YORK will not be liable for costs in-
curred to return the system to satisfactory operation.
In any operating system it is most important to pro-
vide a planned maintenance and inspection of its func-
tioning parts to keep it operating at its peak efficiency.
Therefore, the following maintenance should be per-
formed when prescribed.
COMPRESSOR
1. Oil Filter – When oil pump VSD frequency in-
creases to 55 hz to maintain target oil pressure.
When the oil filter is changed, it should be
inspected thoroughly for any aluminum particles
which would indicate possible bearing wear.
If aluminum particles are found this should be
brought to the attention of the nearest YORK of-
fice for their further investigation and recommen -
dations.
2. Oil Changing – The oil in the compressor must be
changed annually or earlier if it becomes dark or
cloudy. However, quarterly oil analysis can elimi-
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 frequently to in-
sure tightness.
2. Meg motor windings annually to check for dete-
rioration of windings.
GREASED BEARINGS ON RELIANCE Q5800
MOTORS
Motor Operation and Maintenance manuals are sup-
plied with the chillers providing maintenance sched-
ules and instructions for the specific motors. The fol-
lowing 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 installa-
tion. Grease fittings 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 on page 49 )
TABLE 4 - BEARING LUBRICATION
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 inter-
vals is recommended. However, removing the seal, cleaning and
refilling the bearing and the cavity with recommended grease can
re-lubricate these bearings.
Reliance motors in the 5800 frame size are equipped
entirely with grease-lubricated ball-bearings. The fol-
lowing outlines the lubrication requirements for these
bearings:
• The motor bearings are properly lubricated as re-
ceived from YORK. There is no need to add lubri-
cant to the motor bearings at start-up. Too much
grease in the motor bearing cavity may cause ex-
cessive bearing temperature.
• 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
distribute 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 moving bearing elements. This noise
should sub-side after a few days of operation. In-
termittent bear-ing squeal is not cause for alarm.
• Use only Texaco Premium RB (Code 1939)
grease to lubricate the motor bearings, as indi-
cated in Reliance literature for these motors. The
grease is readily available throughout most of the
world, from Texaco distributors – and in Africa,
Australia, and the Pacific Rim countries from
Caltex distributors. Other types of grease may be
chemically and mechanically incompatible with
this Texaco Premium RB grease, and
are not to
be used .