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Variable Speed Pump Outdoor Reset Control






The low cost, energy efficient VSP-Elite provides more precise control of pump speed than any other similar product on the market. And it works great as an outdoor reset control or a set point control. The VSP-Elite adjusts the speed of a pump to control the amount of hot water injected into the heating/secondary loop. The VSP-Elite controls the injection pumps to a high level of precision, thus providing accurate control over the secondary loop temperature. Unlike other controls, the VSP-Elite can operate the pump at a significantly lower speed. Lower speed means more precise temperature control and higher overall efficiency.


The VSP-Elite is designed with boiler protection in mind. It monitors the boiler return temperature and reduces the injection pump speed to increase the return in low critical return situations.


Now, the VSP-Elite offers manual speed control for well balanced injection applications. Simply, select Manual Speed Control and then specify the pump speed that best fits the injection system.



  • Built-In Outdoor Reset with a customizable reset curve option.
  • Can operate to achieve an adjustable set point.
  • Adjustable outdoor temperature cutoff.
  • Operate pump at speeds lower than competitors for mild weather control.
  • Manual pump speed control for well balanced systems.
  • Remote enable/disable capability.
  • Now with setback and boost functionality for better comfort and energy saving.
  • Boiler return protection capability.
  • Comes complete with Outdoor Sensor, System Sensor, Boiler return Sensor, and a well.
  • Solid state sensors can be extended up to 500′ from the control
  • UL Listed



VSP-Elite 929185-00


Digi-Elite Wiring Enclosure with a switch 929135-00
Digi-Elite Wiring Enclosure without a switch 929137-00



My outdoor sensor reading does not match the actual temperature.

The outdoor sensor measurement may vary based on its location and its sun exposure. In most cases it will never match a weather station that is located several miles away. most current Heat-Timer controls have a Trim feature which allows the sensor reading to be slightly modified just a few degrees to satisfy similar circumstances. If the difference was large, then check the sensor by disconnecting one of its wires from the control. The control should read OPEN. If not, contact technical support. r

Why is my temperature sensor reading Open on the control display?

Remove the sensor wires from the control and check for continuity across the wires with and meter. If no continuity existed, check or replace the wires. if continuity did exist, then contact technical support.

Why is my temperature sensor reading Short on the control display?

Remove one of the sensor wires from the control. The control display should change and display OPEN. Then check the sensor wiring specifically around spliced areas. If wiring was good, then disconnect the sensor wires from the control and check the sensor wires with an Ohm meter. The readings should match the sensor temperature chart on the control manual. It not, then replace the sensor. If after removing one of the sensor wires the control read SHORT, then contact tech support.



Download the VSP Elite in Google Sketchup 3D format by clicking here.

Download the Wiring Enclosure Elite in Google Sketchup 3D format by clicking here.