Troubleshooting Damper Motors
Although damper motors are completely sealed, they do malfunction from time to time. The principal malfunctions, their possible causes, and suggested remedies are listed in Table 7-4.
Some manufacturers produce special compact control units for mounting on damper motors. These control units (for example, the Honeywell W859 Economizer shown in Figure 7-21) give damper motors the capacity to regulate the outside and recirculated air dampers for the following applications:
• To bring in outside air (when it is colder than the inside air) for cooling or ventilating
• To close outdoor air dampers to minimum position during the heating cycle
• To prevent short cycling of the cooling compressor to avoid coil icing
Related posts:
Steam and Hydronic Line Controls:Float and Thermostatic Traps
Heat energy and transfer: Vacuum flask.
Radiators, Convectors, and Unit Heaters:Integral Fin-and-Tube Baseboard Heaters
Other Automatic Controls:Fan Controls
Compressible Flow,Nozzles and Diffusers:Laval Nozzle
Motors:The Wound Rotor Induction Motor
Oil Furnaces:Air Conditioning and Starting the Burner
TRANSFORMERS:CALCULATING TRANSFORMER VALUES USING THE TURNS RATIO
Introduction on Ventilation and Indoor Air Quality