This document provides information for setting Honeywell controllers DC230B-EE-20-10-0A00000-00-0 (Figure 1) when used to indicate levels in Heatec asphalt tanks. It applies to six sizes of Heatec vertical tanks equipped with VEGA PULS 65 radar sensors.

The controller indicates levels of asphalt in the tank. Levels are shown in feet, measured from the bottom of the tank. The controller automatically shuts off pumps used to fill the tank when the tank reaches a preset “full” level. It also activates an alarm when the tank is “full.”

When the asphalt level reaches its low-level setting, the controller shuts off the valve that allows hot oil to heat the tank. The low-level setting prevents heating the asphalt when its level is below the heating coils and avoids coking the coils.

Honeywell controllers purchased from Heatec are normally set at our factory and require no further setup. However, the controller can be reset in the field using the information shown in Figure 2.

Honeywell UDC 2300 Universal Digital Controller User Manual is furnished with each controller. Please refer to this manual for instructions on using the buttons to set the controller.

COORDINATION OF SETTINGS

Certain settings of the Honeywell controller should be coordinated with the settings on the radar sensor. Thus, when you change settings on the radar sensor, you should also change settings on the Honeywell controller.

The latest changes to the radar settings are made in Heatec Tec-Note 5-04-116, Revised 10-11-04: Setting up Vega radar sensors for Heatec vertical asphalt tanks.

So it is extremely important for you to change the settings of the Honeywell controller when you make the changes shown in that Tec-Note. Failure to change these settings will result in erroneous level indications and improper shutoff control!

New settings on the Honeywell controller are highlighted in yellow.