Issues we routinely find during our checks and tests.
Selected checks and tests. | Examples of Issues Routinely Discovered by CCx. |
Prefunctional Checks: | |
Physical condition of equipment. | Incorrect mounting, vibration control not installed, inadequate service clearance, damaged equipment/filters. |
Installation of adjacent piping and ductwork. | Insufficient insulation, incorrect valves/dampers installed, missing valves/dampers/testing ports, inadequate clearance for TAB. |
Visual check of control devices. | Wiring not complete, mounted in a way that will impede function (incorrect location or orientation). |
Functional Verifications: | |
BAS Graphic Accuracy | Missing graphics, missing points, thermostats mis-mapped. |
Sensor Accuracy | Missing sensors, inaccurate/malfunctioning sensors. |
Valve and Damper Function | Valves/dampers that won’t open/close completely, valves/dampers wired backwards. |
Integrated Functional Testing: | |
Alarms and Safeties | Alarms not generated as required in sequences, alarms not pushed through to main screen and/or not logged. |
Enable/Disable (based on): OAT, Schedule, Sensor Input, and/or Occupancy | Manual overrides affecting system performance, equipment fails to follow schedule/mode as programmed. Trending not set up to record data as required. |
Temperature and Humidity Control | False loading (hot or cold) resulting in overly cooled or heated spaces, dehumidification modes not activating, units not modulating as required in sequences. |
Fan Speed Control | Unit not following sequences as required (sensor or programming issue), supply and exhaust fans not coordinated as required. |
Building and Zone Pressure Control | Building/zone/room severely over/under pressurized due to sensor or programming issues. |
Energy Recovery | Energy recovery device running at incorrect time/conditions. |
Space CO2 control | Units not responding to increased CO2 levels due to sensor or programming issues. |
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