York YCAS0295EB, Installation Operation & Maintenance

Page: 184 / 194

184 YORK INTERNATIONAL
FORM 201.19-NM7 (804)
GENERAL REQUIREMENTS
The units have been designed to operate continuously,
provided they are regularly maintained and operated
with in the limitations given in this manual. Each unit
should be included in a routine schedule of daily main-
te nance checks by the operator/customer, backed up by
regular service inspection and maintenance visits by a
suitably qualifi ed Service Engineer.
It is the responsibility of the owner to provide mainte-
nance on the system.
It is entirely the responsibility of the owner to provide
for these regular maintenance requirements and/or en ter
into a maintenance agreement with a York In ter na tion al
ser vice organization to protect the operation of the unit.
If damage or a system failure occurs due to improper
main te nance during the warranty period, YORK shall
not be liable for costs incurred to return the unit to sat-
isfactory condition.
If system failure occurs due to improp-
er maintenance during the warranty
period, YORK will not be liable for
costs incurred to return the system to
satisfactory operation. The following
is intended only as a guide and covers
only the chiller unit components. It
does not cover other related system
components which may or may not be
furnished by YORK. System compo-
nents should be maintained accord-
ing to the individual manufacture's
recommendations as their operation
will affect the operation of the chiller.
This maintenance section applies to
the basic unit only and may, on in di -
vid u al contracts, be sup ple ment ed by
additional requirements to cover any
mod i fi ca tions or ancillary equipment
as applicable.
The Safety Section of this manual
should be read care ful ly before at-
tempt ing any main te nance op er a tions
on the unit.
Daily/Weekly Maintenance
The following maintenance checks should be carried
out on a daily/weekly basis by the operator/customer.
Please note that the units are not generally user service-
able and no attempt should be made to rectify faults or
prob lems found during daily checks unless competent
and equipped to do so. If in any doubt, contact your local
YORK Service Agent.
Unit Status : Press the ‘STATUS’ key on the keypad
and ensure no fault messages are displayed (refer to
the MBCS Manual for explanation of messages and the
Trou ble Shooting section for courses of action).
Refrigerant Leaks : Visually check the heat ex chang ers,
compressors and pipework for damage and gas leaks.
CONDENSER COILS
Dirt and foreign material should not be allowed to accu-
mulate on the condenser coil surfaces. Cleaning should
be as often as necessary to keep coil clean.
Exercise care when cleaning the coil
so that the coil fi ns are not damaged.
Operating conditions : Read the operating pressures and
temperatures at the control panel using the dis play keys
and check that these are within the operating lim i ta tions
in this Manual.
Compressor oil level : Check the compressor oil level
after the compressor has been operating on ‘FULL
LOAD’ for approximately half an hour. The oil level
should be visible in the upper of the two sight glasses.
When the compressor is operating at ‘PART LOAD’,
the level may fall as far as half way down the lower
sight glass but should not fall below this level. When
the com pres sor returns to full load the level will return
to the upper sight glass. If oil is added, be aware it is
MAINTENANCE
Maintenance