6-4. Startup procedure after stopping run for a long time
In case stopping the operation for a long time, remove the refrigerant to a separate refrigerant container in order to
reduce pressure inside the machine and the possibility of leakage.
Replenish approximately 5kg of refrigerant to prevent air coming into the machine.
In case the temperature of the location where the machine is installed goes down below zero often, drain the chilled
water, cooling water and condensed water to avoid freezing, and leave the water box drain open.
Leave the oil filled in the machine, and supply power to the oil heater enough to keep the oil temperature to the mini-
mum.
In case stopping the chiller for a long term(more than 1 month) or temporarily(less than 1 month), check the following
items before operating again.
1. Troubleshoot the unsafe or problem areas for the proper operation of the machine.
2. Make the following inspections mandatory in order to avoid refrigerant loss due to leakage during the stop period.
1) Lubrication system
◇
Loosening and cracking of oil pipes
◇
Oil change
◇
Cleaning or change of Oil filter
2) Chilling system
◇
Refrigerant contamination checking
◇
Tube cleaning
◇
Cleaning or change of filters
◇
Ejector cleaning
◇
Water quality analysis
3) Storage of water related parts of condenser and evaporator (corrosion preventive measure during the stop pe-
riod). Take into account the followings to prevent the tubes of condenser and evaporator being corroded during
a long-term stop.
- Make sure to drain water all the time before storage.
- Conduct the regular preliminary checks and system inspection carefully during operation, and conduct the con-
trol test before starting.
3. Check the 1~2 items above, and start the machine in accordance with “Commissioning and Startup”.
86
6. Co
mmi
ss
i
o
ning
ENGLISH
Содержание LCWW
Страница 119: ......
