Filter housing not maintaining water level

To fill the filter housing - have the chiller switched off, with water valves open, open the air release valve until water comes out of the top, then close the air release valve and turn the chiller on. If the filter housing is not maintaining water level, this may be due to an air leakage - ensure everything is tight, if the issue still persists - This is most likely due to installing the filter round the wrong way please see this video and ensure all arrows filter and pump are facing towards the inlet of the chiller, remember to water flow should always run through the filter before the pump.