Compressed Air Dryer Chapter 3: Installation 18 of 313-4 Making Electrical ConnectionsThe serial tag lists voltage, phase, and amp draw information. Line voltage must be withinplus or minus ten percent of the voltage listed on the serial tag, or damage may occur. Neversupply any voltage other than what the dryer is configured for.Fulfill all national, state, and local safety and electrical code requirements. A qualifiedelectrician should make all electrical connections.Connect main power to the dryer. Install a fused disconnect with a lockout feature in thepower main leading to the dryer. The power drop must include a ground wire. Make sure allelectrical connections are tight.Note: Due to variances in 220-240 V connections, customers must supply the plug forthese dryer models.3-5 Making Compressed Air ConnectionsThe compressed air supply must be regulated to 80 PSI (5.5 bars). Low air pressure willcreate poor drying performance. If the pressure in the system drops below 35 PSI, the alarmlight will activate and the process heater and solenoid valve will shut off.Note: For maximum drying efficiency, we recommend a refrigerated compressed airconnection. Not using refrigerated compressed air (to provide pre-conditionedcompressed air to this unit) will affect drying performance and material dryingcapabilities.To achieve the lowest possible dew points, an optional remote-mount membrane dryerassembly is available. See Section 2-7 on page 11 for more information about the remote-mount membrane dryer assembly.Connect a minimum of 3/8” (9 mm) air line to the top of the filter regulator. Compressed airmust be clean, dry, and free of oil. A shut-off is recommended for your in-plant air supply.In-line filters can handle small amounts of moisture; in-line desiccant filters or packed bedsof granular absorbing polymer can remove oil mist and condensed oil.