LG RCWFH Series, Инструкция по эксплуатации

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ENGLISH
105
6-4. Startup procedure after long-period of stoppage
When letting the chiller to be still for a long period of stoppage, the refrigerant must be transferred to a separate re-
frigerant pot to prevent machine pressure decrease and leak.
Charge approximately 5kg of refrigerant into the machine to prevent air-entrance.
If the installed area of the chiller is frequently a place of below zero, drain the chilled water, cooling water and the
condensing water to prevent freezing. Also waterbox drain must be opened.
Leave the oil in the machine and supply heater power to maintain minimum oil tank temperature.
Before operating the centrifugal chiller after long-period of stoppage (longer than 1 month) or instant stoppage (less
than a month), follow the next steps.
1. The machine should be checked for unstable part or for abnormality for smooth operation.
2. To prevent refrigerant loss due to leak during the stoppage, following steps must be taken.
1) Compressor (simple inspection over the rotating part)
* Simply check from the appearance of the impeller, bearing and rotating part.
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Combination status of the impeller and the shaft
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Assemble condition of the Gear
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Foreign substance in the gear box
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End play of the impeller shaft
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Assemble condition of the guide vane
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Check the vane and the drive shaft
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Check the gap between the impeller and the cover with a thickness gauge
2) Lubrication system
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Loosen and crack of the oil pipe
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Replacing or clearing the oil filter
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Cleaning the oil tank
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Replacing the oil
3) Refrigeration System
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Check the refrigerant pollution possibility
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Clean the ejector
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Clean the tube
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Water quality analysis
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Exchange or clean filter related parts
4) Condenser, Evaporator Preservation (Corrosion countermeasures while stoppage)
During a long term period stoppage, follow the next steps for the corrosion countermeasures due to condenser
and evaporator tube corrosion.
- Each tube should be brushed and the scales must be removed completely. Fill it in with clean water. Finally
preserve it with rustic proof material in it.
- In principle preserve the chiller without water after complete drain.
- Execute all regular maintenance check-up and the inspection for the operation system with care. Controlling
test should be taken before the main operation.
If the compressor oil indicates an abnormal high-level display, there are possibilities that the oil absorbed the
refrigerant.
3. Start the machine in accordance with “Start-up” after checking the 1~2 items.