CHS_LHS

30366461EN-08 11 LU-VE Group reserves the right to change specifications without prior notification. 3.20 Sight glass in the liquid tubing On DX systems, LU-VE Group recommends the utilization of a sight glass (to be installed immediately in front of the thermostatic expansion valve). LU-VE Group recommends that this sight glass be inspected promptly for clarity, so that in the event of problems when the installation is activated or during operation it can be established whether any flash gas is in front of the expansion valve. 3.21 Commissioning All connections must be thoroughly leak tested and the system evacuated in line with normal refrigeration practice. All bolts, fastenings, electrical connections etc., must be checked for security. In addition, the fans should be checked for correct rotation. If necessary, change the phase wiring to obtain correct rotation. Set all apparatus to operating temperatures and test run the heat exchanger to check for undue vibrations, and badly secured components, etc. LU-VE Group strongly recommends to perform the filling of the circuit with an authorized company. 3.22 Switching off During operation, switch off the device via the control input. Do not switch the motor (e.g. in cyclic operation) on and off via power supply. To activate the on current limitation, you must wait at least 90 seconds after switching off the line voltage before switching back on. During maintenance operation disconnect the device from the power supply and be sure to disconnect the ground connection last.