Gardner Denver DGH Series Instruction Manual page 15

Table 5-1 (continued from previous page)
Notes:
1. The Level 1 and Level 2 Controllers will accept either AC (Alternating Current) or DC (Direct Current) input power.
2. The auxiliary power terminals are in parallel with the input power terminals (i.e., there are two common terminals for each input power connection point, L, N,
and PE. The auxiliary power terminals provide a connection point for another device that operates on the same voltage as the Desiccant Dryer Controller.
3. The controller has two power recovery modes. For Level 1 the selection is made using a jumper on the circuit board. For Level 2 the selection is made using
the switches on the front panel. In one mode, the controller remembers its state (on or off) prior to a power interruption and returns to that state when power is
restored. In the other mode, the controller always returns to the off state when power is restored after an interruption.
4. The service reminder LEDs indicate that it is time to perform preventive maintenance on the (a) filters and drains, (b) valves, or (c) desiccant. The user
selects between Normal and Severe service intervals. For Level 1 the selection is made using a jumper on the circuit board. For Level 2 the selection is made
using the switches on the front panel.
5. For Level 1 and Level 2, the operating mode (with exception of the MOP) is selected via switches on the front panel.
6. The Level 1 Energy (purge) Saver feature has eight settings, 0% to 70% in 10% increments. Energy Saver setting = 100% – (percentage of adjusted
allowable inlet flow). (e.g. if the maximum adjusted allowable inlet flow to a dryer was 1000 SCFM, but the actual flow to the inlet was only 300 SCFM, then the
Energy Saving setting would be 100%-((300/1000)*100%)=70%. At 300 SCFM, only 30% of the dryer capacity is being utilized. Average purge requirements
and the related energy needed to compress that purge air can be reduced by 70%.) The selection is made using a switch on the front panel.
7. PDPT - Pressure Dew Point
MOP - Maximum Operating Pressure
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5. Controllers – General
5. Controllers – General