The One Stage Setpoint Control 150 is designed to operate a single component of a heating or cooling system in order to maintain a set temperature. It can be used in applications ranging from heating a swimming pool to maintaining a constant slab temperature in a commercial car wash bay. This control regulates a constant setpoint water temperature for heating or cooling. The 150 is designed to operate a single relay (rated at 240 V, 8 A) to control a single device such as a boiler, pump, or valve. Features include: Digital display, heat or cool setpoint control, normally open and normally closed relay and pulse with modulation control. Control: Microprocessor control. This is not a safety (limit) control. Dimensions: 4-3/4 in. H x 2-7/8 in. W x 7/8 in. D (120 x 74 x 22 mm). Ambient Conditions: Indoor use only, -20 to 120°F (-30 to 50°C), RH ≤90% Non-condensing. Power Supply: 24 V (ac) ±10%, 50/60 Hz, 1.3 VA, 24 V (dc) ±10%, 0.02 A. Relay: 240 V (ac) 8 A max, 1/4 hp. Included: Universal Sensor 071.