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Category: Service Procedures

Service Procedures

AIRFLOW MEASUREMENT IN A FAN COIL WITH ELECTRIC HEAT

Posted on June 12, 2019 by Jack

Purpose – This procedure describes how to calculate the quantity of airflow in cubic feet per minute (CFM) being delivered by a fan coil containing…

Service Procedures

COOLING SYSTEM PROPER AIRFLOW RANGE

Posted on June 12, 2019 by Jack

Purpose — This procedure describes how to determine if airflow across the evaporator in a cooling system is adequate. For proper operation of a cooling…

Service Procedures

TEMPERATURE RISE MEASUREMENT IN A FOSSIL-FUEL FURNACE

Posted on June 11, 2019 by Jack

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…

Service Procedures

FAULT ISOLATION OF NON-REPAIRABLE ELECTRONIC CONTROLS

Posted on June 10, 2019 by Jack
Service Procedures

FLAME RECTIFICATION CIRCUIT FLAME-PROVING SIGNAL MEASUREMENT PROCEDURE

Posted on May 15, 2019June 9, 2019 by matt
Service Procedures

THERMOCOUPLE VOLTAGE MEASUREMENT PROCEDURE

Posted on May 15, 2019June 9, 2019 by matt
Service Procedures

MOTOR OPEN, SHORTED, OR GROUNDED CIRCUIT MEASUREMENT PROCEDURE

Posted on May 14, 2019June 9, 2019 by matt
Service Procedures

RUN CAPACITOR MEASUREMENT PROCEDURE

Posted on May 1, 2019June 9, 2019 by matt
Service Procedures

Electric Motor Capacitor Checks and Replacement

Posted on May 1, 2019June 9, 2019 by matt

Capacitor Checks and Replacement Start and run circuits on single-phase motors use capacitors. Capacitors affect the wattage, amperage draw, torque, speed, efficiency, and power factor…

Service Procedures

Electrical Motor Types

Posted on April 22, 2019June 10, 2019 by matt

Both single-phase and three-phase motors are used in residential and light commercial systems. However, because of their good running characteristics and high efficiency, single-phase motors…

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