Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24use a strainer to capture any debris. Any chemicals used in the flushing process must be compatible with copper and silver. Consideration should be given to winter conditions. If freezing winter weather is a concern external spray pipes should be drained before the onset of freezing weather or insulated and heat traced to prevent pipe bursts. Provisions for disconnecting and draining the water should be made prior to installation. The VIRGA III should never be used as a ground for arc welding equipment. Commissioning Preparation WARNING Due to the risk of electric shock and arc flash if work must be performed on an energized control cabinet it should only be done by trained personnel wearing appropriate PPE. Before powering on the VIRGA III 1. Fill the system with water or a waterglycol solution as specified by NIMBUS . Vent all air from the system. 2. With the power turned OFF carefully inspect the controls enclosure. Check for loose wire connections. Wires may have shaken loose during transportation or installation. 3. Ensure that all circuit breakers are in the ON position and that transformer fuses are intact. 4. Ensure that motor overloads are not tripped. 5. Check that motor overloads are set to the full load current of the fan motors. After powering on the VIRGA III 6. Ensure that the controller is energized. The LCD screen should be illuminated and should display the water temperature. Depending on the water temperature one or more fans may turn on shortly after applying power. 7. The controller will arrive pre-programmed to your specifications and should not need adjustment. Adjusting the settings can negatively affect the performance of your VIRGA III. Lower is not necessarily better. Setting the fluid temperature too low can lead to condensation in the cooling loop which may cause serious damage to important process equipment. English 2