| 5.3102.33a
Verify proper placement, type, and condition of sensors | Sensor location, type, and condition will be assessed in accordance with selected control strategy | Determine condition and presence of existing sensors for variable frequency drive (VFD) operation |
| 5.3102.33b
Install, repair, relocate, or replace sensors as necessary | Sensors will be installed or replaced in accordance with manufacturer specifications and as required for selected control strategy | Ensure required sensors are properly located and functioning for VFD operation |
| 5.3102.33c
Initial setup of VFD | VFD parameters will be set up to accept feedback from sensors dependent upon chosen control strategy and to maintain minimum boiler and pump flows | Set initial parameters to maintain minimum system pumping requirements with reduced electrical energy use |
| 5.3102.33d
Modify operating set points based on observed system performance | Accurate supply and return temperatures will be obtained and compared to design distribution loop temperature differential on representative mild, cold, and design temperature days Settings will be adjusted to maintain design distribution loop differential temperature on representative mild, cold, and design temperature days Minimum distribution loop water temperature requirement will be maintained Minimum boiler and pump flow rates will be maintained | Ensure optimal settings based on actual operating conditions to limit system from over pumping and to reduce the pump energy consumption while protecting the pump and boiler |
| 5.3102.33e
Record and report settings | Observed supply, return, and outdoor temperatures and all control set points on representative mild, cold, and design temperature days will be documented and provided to building operations staff | Ensure written record of settings |
| 5.3102.33f
Educate building operations staff | Building operations staff will be educated to operate VFD systems, including sensor location, control operation, and set points | Ensure continued optimized performance |
