| 主权项 |
1. A method to test a heating ventilation and air conditioning (HVAC) unit for external leaks, the HVAC unit including a first port defining one of an inlet or an outlet of the HVAC unit and a second port defining the other of the inlet or the outlet of the HVAC unit, wherein the first port and the second port are in fluid communication, the HVAC unit also include a heat exchanger and a condensate drain, the method comprising:
coupling an auxiliary air movement test system to the HVAC, the auxiliary air movement test system including an air movement device, a conduit extending from the air movement device, a flow velocity sensor positioned within the conduit, and a pressure sensor; wherein the conduit is coupled to one of the first or second ports of the HVAC unit and the pressure sensor is disposed proximate the condensate drain; blocking the other of the first or second ports of the HVAC unit; enabling airflow through the first port or the second port that the conduit is coupled to; measuring air pressure within the HVAC unit with the pressure sensor; stabilizing air pressure within the HVAC unit at a predetermined pressure by adjusting an output of the air movement device; measuring air velocity within the conduit with the flow velocity sensor; determining an amount of external leakage from the HVAC unit based on the measured air velocity; and if the measured air velocity exceeds a predefined air velocity at the predetermined pressure, reducing the external leaks of the HVAC unit. |
