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PENN Controls Products Catalog

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A19D Series Surface Mounted Temperature Control Description The A19D Series Surface Mounted Temperature Controls are reliable, durable On/Off temperature controls with line-voltage single-pole, double- throw (SPDT) switches. The A19D Series Controls are designed primarily for fluid piping applications and include two adjustable mounting straps for mounting the control directly to a pipe. Refer to the A19D Series Surface Mounted Temperature Controls Product Bulletin (LIT-125070) for important product application information. Features • SPDT switch action provides either high or low temperature detection • Sealed, dust-protected switch provides reliable and durable On/Off control for commercial and industrial applications • Color-coded electrical terminals simplify wiring the controls • Sensing element insulated from the control case minimizes the effects of ambient temperature on the control setpoint • Convertible range adjuster kit provides knob, screwdriver, or concealed adjustment options • Multi-position mounting capability allows you to mount the control in any position on horizontal, vertical, or angled pipes • NEMA 1 enclosure provides protection against contact with the control's electrical components and protects the switch and electrical terminals from incidental contact Applications Typical A19D control applications include high temperature detection on boiler applications and low temperature detection on unit heaters coil applications. Figure 7: A19D Series Control Switch Action 33

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