Tips for seasonal water chiller system shutdown in winter | Hstarschiller.com

 Introduction: Winter is coming, and the ambient temperature is about to drop below zero. This will cause great damage to the chillers, water pumps, cooling towers, terminals and other equipment. In order to ensure that chillers work normally during winter, the chiller has to survive in the low temperature environment, because it will cause a great loss to users if the unit is not maintained with proper seasonal shutdown.

First of all, when those chillers are not going to turn on during winter for seasonal shutdown, water among chillers, pipes, pumps, cooling towers and terminals must be drained out clean in advance when the ambient temperature is below zero.

How are we going to do for the water chiller HVAC system shutdown in winter ?

Here are the tips below for seasonal water chiller system shutdown in winter how to drain out the water from HVAC system.

1. Shell and Tube Condenser: Open the end cap of the water pipe.  After opening, pay attention to the end cover and screws. Install the end cover and screws before starting the next year. (Remember: Do not do this for evaporator drainage!!!)

2. Shell and Tube Evaporator: You can open the drain valve under the evaporator to drain the water. It is best to keep the drain valve normally open in winter, and turn off the water supply before turning on at the next year.

3. Pipes and pumps: Drain water at the lowest point of pipes and pumps.

4.Square type Cooling tower: Open the drain valve at the lowest part of the cooling tower  water tray to drain the chassis water. It is best to be in the normally open state during different periods.

5.End: There is a drain valve at the lowest end of the coil, and the drain valve is also opened. Leave the drain valve open during winter.

What methods should we take to avoid damages to chillers?

During the day or night period of non-use, the pump must be kept running, and the water must be drained if it is not used for a long time. In case of severe weather (the temperature is lower than -10℃), it is the best to shut down and drain the water, or add antifreeze material into to the water.

H.Stars Group has specialized in manufacturing high quality and energy-saving water cooled chiller for more than 28 years, providing one stop HVAC solutions to all clients. The chiller system has designed 7 different protection systems including Reversed-phase Protection System, Over-current Protection System, Compressor Exhaust Gas Temp Protection System, Over-high/Over-low Pressure Protection System, Over-low Temperature Protection System, Water Flow Rate Protection System ,which can ensure users with a longer life span of the chiller unit. For more details , welcome to contact us at email maychow@hstars.com.cn.