Model  GC1200 Operating Instructions

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Controller Adjustment

The Greenhill Intermittent Controller has three user adjustments:  On Time, Off Time and Temperature.  The best starting points are marked, and are On for 1 minute, Off for 9 minutes, and 78oF Activation Temperature.

Timing Adjustment

The On Time is adjustable from 0 to 60 minutes.  Observe the green blinking On Time light;  turning the knob clockwise will increase the On Time and slow the green light's blinking speed.  Turning the knob counter-clockwise will decrease the On Time, and thus increase the light's blinking speed.  Off Time adjustment works the same as On Time, but Off Time has a red blinking light.

Temperature Adjustment

The Activation Temperature is adjustable from 40o to 100o F.  The Temperature adjustment also has a red light that indicates when room temperature exceeds Activation Temperature.

This means that at temperatures above the Activation Temperature, the Controller will be running, and if the green On light is blinking, water will pass to the nozzles.  If the temperature is below the set point, the controller will wait until the temperature rises before activating the water.

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