6• The cell must always be the last element placed on the pool return pipe (see diagram).• It is always recommended to install the cell on a by-pass. This assembly is MANDATORY if the fl ow is inexcess of 18 m³/hour to avoid load loss.• If you installed the cell on a by-pass, it is recommended to fi t a check valve downstream from the cellinstead of a manual valve, to avoid the risk of an improper setting which could result in the incorrect fl owwater back into the cell.• Failure to locate and orient the cell in strict accordance with these instructions can result in a hazardousbuildup of pressurized gas which can result in serious property damage and serious injury, including loss oflife.An "AUS" reducer and a black seal are supplied in the installati on kit. They are intended for 1 1/2" (= 38 mm)pipes. However, the black seal can be used instead of the original seal if the pipe is not standardised (diametersmaller than ND 50 or ND 63).2.4 Installing the flow controller (Ei² Expert only)The flow controller and its fixture collar (Ø50 mm) must imperatively be installed on the piping close to the cell andupstream from it. Use the threaded adapter and Teflon tape supplied to install the flow controller on its fixture collar.• Cell installed in by-pass: the flow controller must be installed on the cell by-pass between the upstream isolati on valveand the cell itself.• Cell installed in line: the flow controller must be installed just in front of the cell and after a possible valve.• Fixer le contrôleur de débit en utilisant uniquement l’écrou de serrage.Écrou deserrage• Failure to comply with these instructions could lead to the destruction of the cell! The manufacturer cannotbe held liable in this case.• The fl ow detector has a direction for installation (arrow indicated on it showing the fl ow directionfor the water). Make sure that is is correctly placed on its fi xture collar so that it stops the salt waterchlorinator producti on when fi ltering is stopped ("No fl ow" displayed showing the absence of fl ow, see "5.Troubleshooting").2.5 Electric connecti ons2.5.1 Connecting the control boxThe salt water chlorinator can be connected in compliance with the applicable standards in the country of installati on.Ei² - GenSalt OE :• Mandatory connecti on: directly interlocked with the pool filtrati on pump (the appliance is only supplied with powerwhen the pool filtrati on pump is operating).Ei² Expert:• Preferred connecti on: the appliance is permanently connected (hard-wired) to the power supply (power supplyprotected by a 30 mA ground fault circuit breaker).• Possible connection: directly coupled to the pool filtering (the appliance is only supplied with power when filtering isoperating).==> When all connections (electrical and hydraulic) have been made, reconnect (turn on) the mains power supply topower on the appliance.• Failure to comply with these instructions could lead to the destruction of the cell! The manufacturer cannotbe held liable in this case.• Whichever connecti on is used, it is mandatory to programme the Ei² Expert operating times (called "Timers")(see "3.2.5 "Summer" and "Winter" modes and setting the "Timers"").