Bühler technologies EGK 2A Ex, Инструкция по установке и эксплуатации, Страница: 25 / 61

EGK 2A Ex
– Close the terminal box observing the following items: No foreign objects, contaminants or moisture may be inside it. Tighten
the terminal box at a tightening torque of 4 Nm, dust- and waterproof (be sure not to crush any cables!).
– Now restart the cooler per chapter Operation and controls [> page 15].
– Test per chapter Testing the pressure monitoring circuit [> page 20].
– Allow the cooler to operate and check if it reaches the operating range.
7.3.5 Replacing the display
– Observe the warnings in chapter Maintenance [> page 19].
– De-energise (supply and status outlet) and depressurise the system.
– Loosen the four screws in the corners of the front on the black terminal box.
– Carefully lift of cover: The control elements are attached to the to the electronics with cables.
– Turn the cover and put down on the cooler. Be careful not to tension the cables.
– Disconnect all cables. Although the cables are colour coded, you should mark the conductors if you are unsure.
– Remove the display cable. To do so, undo the safety catch of the X4 plug and unplug the flat plug.
– Loosen the three screws at the back of the display board and remove the display including cable from the terminal box cover.
– Disconnect the ribbon cable from the display.
– Attach the cable to the replacement display and secure the plug connection from accidentally coming undone.
– Attach the display to the terminal box cover and secure with three screws (tightening torque 0.4 Nm).
– Attach the display cable to the electronics and secure the X4 plug connection.
– Reconnect all wires per drawing 47/170-10-3 in the appendix; the cable colours are specified.
– Close the terminal box observing the following items: No foreign objects, contaminants or moisture may be inside it. Tighten
the terminal box at a tightening torque of 4 Nm, dust- and waterproof (be sure not to crush any cables!).
– Now restart the cooler per chapter Switching on the sample gas cooler [> page 15].
– Test per chapter Maintenance [> page 19].
– Allow the cooler to operate and check if it reaches the operating range.
7.3.6 Replacing the hoses of the peristaltic pump (option)
– Close gas supply.
– Switch off peristaltic pump(s) and disconnect all plugs.
– Disconnect supply and discharge tube on peristaltic pump ( observe safety notes! ).
– Loosen but do not remove centre knurled nut. Flip the screw upward.
– Pull the cover cap off to the bottom.
– Unplug external connections and remove hose.
– Replace hose (Bühler spare part) and install peristaltic pump in reverse order.
– Restore the power and gas supply.
7.3.7 Replacing the Peristaltic Pump (Optional)
– Close gas supply.
– Switch off peristaltic pump(s) and disconnect all plugs.
– Disconnect supply and discharge tube on peristaltic pump ( observe safety notes! ).
– Unscrew condensate pump from the adapter plate
– Attach the new condensate pump to the adapter plate and connect to the heat exchanger (tighten screw/nut connection M6
with 6.3 Nm).
– Restore the power and gas supply.
23 Bühler Technologies GmbH BE450020 ◦ 01/2020