Quantum 67ACW2-134 Owner's Manual
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Contents
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Owners Manual Quantum Energy TechnologiesSection 6: MAINTENANCE6a: GeneralOn initial start-up and periodically during operation, it will be necessary to perform certain routineservice checks.WARNINGIf a system failure occurs due to improper maintenance during the warranty period, Quantumwill not be liable for costs incurred to return the system to satisfactory operation.6b: Compressor6b.1: Lubrication OilThe Oil used in the compressor is clear in colour. If the oil colour darkens or exhibits a change incolour or there are any particles present, this may be an indication of contaminants in therefrigerant system. An oil sample should be taken and analysed. The colour of the oil may be seenfrom the refrigerant sight glass. If contaminants are present, the system must be cleaned.6b.2: Operational NoiseThe system does produce noise during operation however any unusual compressor noise or heavyvibrations may indicate a potential problem. A qualified and experienced refrigeration technicianshould be familiar with normal compressor noise and would be able to advise if the noise beingproduced is abnormal.6b.3: Frost on SumpNo frost should be present on the sump of the compressor.6c: Refrigerant Sight GlassObserve the refrigerant sight glass weekly. A clear glass of liquid indicates adequate sub cooledrefrigerant charge in the system and proper feed through the expansion valve. Bubbling refrigerantin the sight glass indicates the system is short of refrigerant charge, and the system should haveleak detection carried out to ascertain where the refrigerant is leaking from prior to recharging.Sub cooling should be verified to prevent overcharging. Refrigerant gas flashing in the sight glasscould also indicate an excessive pressure drop in the line, possibly due to a clogged filter drier or arestriction elsewhere in the system.The sight glass will also indicate the moisture condition corresponding to the indicated colour. Ifthe sight glass does not indicate a dry condition after about 12 hours of operation (shows yellow inthe centre spot), the refrigerant or oil should be tested for moisture. If there is too much moisturein the system, the refrigerant must be vacuumed from the unit. The oil and the drier must also bechanged, and then new refrigerant added.Document Number : QDC0049PD-5 Page 25 of 33 |
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