Gardner Denver DGH Series Instruction Manual page 17

Table 5-1 (continued from previous page)
Notes:
1. The Basic Timer Based Controller will accept AC (Alternating Current) input power. The Standard and Energy Savings Controllers will
accept either AC (Alternating Current) or DC (Direct Current) input power.
2. (Standard & Energy Savings Controllers) 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. (Standard & Energy Savings Controllers) The controller has two power recovery modes. For Standard Controllers, the selection is
made using a jumper on the circuit board. For Energy Savings Controllers, 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. (Standard & Energy Savings Controllers) 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 Standard
Controllers, the selection is made using a jumper on the circuit board. For Energy Savings Controllers, the selection is made using the
switches on the front panel.
5. (Standard & Energy Savings Controllers) For Standard and Energy Savings Controllers, the operating mode (with exception of the
MOP) is selected via switches on the front panel.
6. (Standard Controllers) The Standard Controller 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. PDP - Pressure Dew Point
MOP - Maximum Operating Pressure
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