The director of commissioning for a world-renowned institution contacted Zentel Tech to investigate issues with the HVAC in their rare book storage facility. The initial problem was that the heat was being carried over to the supply air from the desiccant regeneration system causing the temperature to rise in the storage room. A secondary issue was also present: The motor for the desiccant wheel failed due to the motor leads overheating.
First, we reviewed all of the information and equipment. Then, we proposed a review of the air system performance to evaluate the overall system conditions. During the investigation, it was determined that there was insufficient return air from the book storage area that limited the unit’s performance. We also determined that the insufficient return airflow created an excessive pressure differential between the supply air and the return air, causing the air to bypass the desiccant wheel, which led to extreme temperature conditions for the desiccant motor and increased supply air temperature.
This is a common problem in mechanical systems. Once the root cause is discovered, it can be properly corrected. Our critical environment experience makes us highly efficient in diagnosing and repairing the issues that keep your system from optimal performance.