Solution System319Service Manual – CS7000EcoFlex™ Detergent SystemThe EcoFlex™ detergent system uses dual diaphragm pumps (M17 and M18) to pump detergent into thesolution flow upstream of the solution solenoid valve. Two detergent pumps are used when necessary toensure adequate detergent supply at the higher detergent and solution flow rates. The detergent pumpsreceive PWM outputs from the A1 Main Machine Controller to regulate the detergent dispense rateaccording to the solution flow rate. The detergent supply line from the detergent bottle is split into two lines,one feeding each detergent pump. The two lines from the pumps merge into one line, which is then connectedto the solution hose upstream of the solution solenoid valve.Extended Scrub SystemMachines equipped with the extended scrub system will pump the recovered water from the recovery tankto the scrub brushes when the solution tank is empty. The extended scrub system uses an additional pump(M25) to pump the recovered water to the scrub brushes. In order for the extended scrub system to work, theextended scrub system must be enabled, the solution tank low sensor must be actuated, and the float valvein the recovery tank must be closed to indicate adequate water level in the recovery tank. Note that whenthe machine is in the scrub mode:• The solution pump will continue to run along with the extended scrub pump.• The EcoFlex™ pumps will continue to add detergent to the recovered water.Optional Hot Water System (LP and Diesel EcoFlex™ Machines Only)On EcoFlex™ models equipped with the optional hot water system, the solution control pump pumps thesolution to a heat exchanger. The heat exchanger is plumbed to the engine cooling system and uses thehot engine coolant to heat the solution as it circulates through the heat exchanger. The hot water systemincreases the solution temperature approximately 50 degrees F. The heated solution is then mixed withdetergent and sent through the (open) solution solenoid valve and solution manifold to the brushes.Note: If your machine is equipped with a hot water system, do not add detergent to the solutiontank as this can foul the heat exchanger.Optional Wash Hose KitThe optional wash hose kit uses a separatelow-pressure pump (M23) to pump solution fromthe solution tank to the hose and nozzle locatedbehind the Operator seat. The wash hose kitoperates independently and does not require theOperator to actuate the seat switch. A pressureswitch on the low pressure pump will switch onthe pump when the hose nozzle is opened and thesolution pressure in the hose drops.
