CHAPTER 3: WELDING SYSTEM SET-UPMODEL HF2 2 kHz HIGH FREQUENCY RESISTANCE WELDING POWER SUPPLY990-057 3-9Figure 3-4. Weld Cable and Air Line Connections for Dual Air Actuated Weld Heads6 Connect a properly filtered air line to the Inlet Air Line on the Weld Head Air Valve DriverSolenoid assembly which is located on the back of the Weld Head. Use 0.25 inch O.D. by 0.17inch I.D. plastic hose with a rated burst pressure of 250 psi. Run separate air lines to each InletAir Line. Do not split a single 0.25 O.D. line into two lines or the Weld Heads will not havesufficient air flow to work properly. A lubricator should only be used with automatedinstallations. Turn on the air system and check for leaks.Firing Switch Cable Connection (Figure 3-5)Connect the Weld Head Firing Switch Cable Connector on each Weld Head to the matching connectorson the Model DFS Parallel Switch Box. Connect the Model DFS Firing Switch Cable to the matchingcable connector on the rear of the HF2 Weld Control.
