Category Archives for Service Procedures

AIRFLOW MEASUREMENT IN A FAN COIL WITH ELECTRIC HEAT

Purpose – This procedure describes how to calculate the quantity of airflow in cubic feet per minute (CFM) being delivered by a fan coil containing electric heating elements. Having the correct quantity of airflow is important in order to maintain … Continue reading

12. June 2019 by Jack
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COOLING SYSTEM PROPER AIRFLOW RANGE

Purpose — This procedure describes how to determine if airflow across the evaporator in a cooling system is adequate. For proper operation of a cooling system, the blower should be moving from 400 to 450 CFM of air across the … Continue reading

12. June 2019 by Jack
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TEMPERATURE RISE MEASUREMENT IN A FOSSIL-FUEL FURNACE

Purpose – This procedure describes how to measure the temperature rise in fossil-fuel furnaces. Temperature rise is the difference between the return air temperature entering the furnace, and the supply air temperature leaving the furnace. The amount of temperature rise … Continue reading

11. June 2019 by Jack
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FAULT ISOLATION OF NON-REPAIRABLE ELECTRONIC CONTROLS

10. June 2019 by Jack
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FLAME RECTIFICATION CIRCUIT FLAME-PROVING SIGNAL MEASUREMENT PROCEDURE

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15. May 2019 by matt
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THERMOCOUPLE VOLTAGE MEASUREMENT PROCEDURE

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15. May 2019 by matt
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MOTOR OPEN, SHORTED, OR GROUNDED CIRCUIT MEASUREMENT PROCEDURE

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14. May 2019 by matt
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RUN CAPACITOR MEASUREMENT PROCEDURE

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01. May 2019 by matt
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Electric Motor Capacitor Checks and Replacement

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01. May 2019 by matt
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Electrical Motor Types

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22. April 2019 by matt
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