tekmar Control's Universal Reset Control 374 is capable of controlling two mixing reset loops (variable speed pump injection or mixing valves), a DHW load, a setpoint load and two boiler stages. This control also features a built-in clock with a seven-day programmable setback schedule. Th 374 can also be set up to operate with a tekmar boiler staging control for systems that have more than two boiler stages. tekmar Control Systems Ltd. Circle 26.