Section 7 Preventive Maintenance - York MaxE YK Series Operating & Maintenance

Preventive Maintenance
It is the responsibility of the owner to provide the
necessary daily, monthly and yearly maintenance
requirements of the system. IMPORTANT – If a unit
failure occurs due to improper maintenance during
the warranty period; YORK will not be liable for
costs incurred to return the system to satisfactory
operation.
In any operating system it is most important to
provide a planned maintenance and inspection of its
functioning parts to keep it operating at its peak ef-
ficiency. Therefore, the following maintenance should
be performed 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 in-
spected 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 elim-
inate 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 insure
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:
Toshiba Motor Lubrication
Frame 143T thru 256T are furnished with double
sealed ball bearings, pre-lubricated prior to installa-
34
SECTION 7
PREVENTIVE MAINTENANCE
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 neces-
sary to re-lubricate anti-friction bearings periodically.
(See Table 4)
TABLE 4 – BEARING LUBRICATION
* - 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
• If the motor has been in storage for 6 months prior
• If the motor is inactive for 30 days, the motor shaft
• Some bearing squeal may be noted at start-up.
• Use only Texaco Premium RB (Code 1939)
Frame Standard
Size 8hr/Day
143T-256T *7 Years
284TS - 286TS 210 Days
324TS - 587USS 150 Days
received from YORK. There is no need to add
lubricant to the motor bearings at start-up. Too
much grease in the motor bearing cavity may cause
excessive bearing temperature.
to commissioning, lubricate the motor bearings per
the following instructions prior to start-up.
is to be rotated 15 revolutions in order to distribute
the grease within the bearing.
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. Inter-
mittent bear-ing squeal is not cause for alarm.
grease to lubricate the motor bearings, as indicated
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 dis-
tributors. Other types of grease may be chemically
and mechanically incompatible with this Texaco
Premium RB grease, and are not to be used.
FORM 160.54-O2(1102)
Continuous Grease
24hr Day Qty. oz.
*3 Years *1
70 Days 1
50 Days 2
YORK INTERNATIONAL