What must be ensured before extracting water from a chiller when recovering refrigerant?

Before extracting water from a chiller when recovering refrigerant, it is essential to ensure that the water is moving. This practice is important because circulating water in a chiller system helps maintain a consistent temperature throughout the system and prevents localized overheating, which can cause damage to components. If the water is stagnant, there is a risk of heat buildup in certain areas, potentially leading to malfunction or failure during the recovery process.

While the other conditions may seem relevant, they do not address the critical aspect of maintaining proper temperature and flow within the system during refrigerant recovery. Ensuring that the chiller is turned off is sometimes necessary for safety, but it doesn’t mitigate the risks associated with stagnant water in the system. Similarly, the temperature of the water and whether the system is fully charged are not priority considerations compared to ensuring that the water is actively circulating.