Condenser Water Temperature Too Low

You might have to adjust the bypass valves around the cooling towers to make sure that the waters coming back at the correct temperature.

Condenser water temperature too low. If the temperature is too high above 75 degrees the chiller is consuming excess energy and increasing your monthly energy costs. 7 analysis of abnormal evaporation temperature during overhaul. But stay above 65 f 18 33 c. Low suction pressure could also be caused by the condenser water temperature being too low.

The reason is that there is less refrigerant in the evaporator or the throttle valve has a bad throttling effect. The condenser water enters at around 27 c 81 f so the refrigerant needs to be a greater temperature than this. However if the entering water temperature is 100 f and the leaving water temperature is 85 f that yields an average condensing water temperature of 92 5 f versus an average 90 f if you designed it to operate at 95 f 85 f. There are many reasons for the low evaporation temperature.

If the temperature is too low within the 60 degree range you risk the oil carrying over into the evaporator. For example a ch iller running at 40 f chilled water could operate with an entering co ndenser water temperature below 50 f as long as the leaving condenser water temperature is gr eater than or equal to 55 f. If you have chillers with older controls refer to previous revisions of this bulletin for pressure differential minimums. If the entering water temperature drops too low the condenser head pressure will not be high enough to supply refrigerant through the expansion valve.

If the refrigerant is the same temperature as this return condenser water then the chiller will not be able to reject any heat that s been picked up in the building and so the building will be unable to cool down. Entering condenser water temperature can be up to 95f however 85f is more typical. The correct temperature range for trane chillers is between 72 and 75 degrees. Expansion valve selection is large.