Maintenance
FORM
MAINTENANCE
GENERAL REQUIREMENTS
The units have been designed to operate continuously, provided they are regularly maintained and operated within the limitations given in this manual. Each unit should be included in a routine schedule of daily main- tenance checks by the operator/customer, backed up by regular service inspection and maintenance visits by a suitably qualified 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 enter into a maintenance agreement with a York International service organization to protect the operation of the unit. If damage or a system failure occurs due to improper maintenance 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 indi- vidual contracts, be supplemented by additional requirements to cover any modifications or ancillary equipment as applicable.
The Safety Section of this manual should be read carefully before at- tempting any maintenance operations 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 problems 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 Trouble Shooting section for courses of action).
Refrigerant Leaks: Visually check the heat exchangers, 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 fins are not damaged.
Operating conditions: Read the operating pressures and temperatures at the control panel using the display keys and check that these are within the operating limitations 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 compressor returns to full load the level will return to the upper sight glass. If oil is added, be aware it is
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