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Breakdown of model number components for accurate identification.
Details the serpentine heat exchanger path and its resistance to flow.
Discusses the use of 'INSHOT' type burners for the heat exchanger design.
Explains the function and benefits of the secondary heat exchanger.
Explains the need for an induced draft blower to overcome resistance.
Details required voltage range and single branch circuit needs.
Explains how to check electrical grounding and polarity for safety.
Specifies inlet and manifold pressure for natural gas.
Specifies inlet and manifold pressure for L.P. gas.
Explains methods for checking input rate via manifold pressure or gas meter.
Step-by-step instructions for connecting a manometer and setting manifold pressure.
Procedure to calculate input rate by timing gas meter revolutions.
Explains the function and operation of the L.P. pressure switch.
Details necessary modifications for safe operation at higher altitudes.
Describes the 'INSHOT' type burners and the importance of proper adjustment.
Table showing allowable temperature rise ranges for different models.
Table showing allowable temperature rise for variable speed models.
Discusses types of thermostats and the importance of proper setup.
Guidelines for optimal thermostat placement to ensure accurate temperature control.
Explains the function of heat anticipators and how to set them.
Importance of proper wiring, common issues, and 2-stage operation wiring.
Discusses the main limit and roll out limit switches, their function, and safety.
Explains the function, operation, and troubleshooting of the main limit switch.
Describes the manual reset roll out limits and their function.
Details pressure settings for standard models.
Details pressure settings for high altitude models.
Explains the role of the blower pressure switch in ensuring draft.
Details pipe diameter and length for single vent piping.
Details pipe diameter and length for dual vent piping.
Provides charts for concentric vent termination pipe diameters and lengths.
Details the exhaust blower assembly and its connection.
Explains the function, installation, and maintenance of the condensate drain trap.
Shows DIP switch configurations for various heating OFF delay times.
Shows DIP switch configurations for various heating ON delay times.
Outlines testing procedures for checking heating and cooling functions.
Explains the function, components, and testing of the gas valve/ignition control.
Describes the sequence of operations for a cooling call.
Describes the sequence of operations for a circulating fan call.
Details the sequence for single-stage thermostat heating requests.
Details the sequence for two-stage thermostat heating requests.
Lists and explains the flash codes from the SV9541Q control for troubleshooting.
Explains the flame rectification method and how to check flame current.
Discusses permanent split capacitor motors and how to test their capacitors.
Details how to select heating speed based on temperature rise and CFM.
Details how to select cooling speed based on CFM per ton.
Method to calculate approximate airflow using temperature rise if a manometer is unavailable.
Explains how to adjust blower speeds for DC motors via switch settings.
General procedure for changing blower speeds on variable speed and 2-speed models.
Table showing switch settings for different airflow configurations.
Table showing temperature adjustments for low heat settings.
Table showing temperature adjustments for high heat settings.
Details how to set heating speeds for PSC motors.
Details how to set cooling speeds for PSC motors.
Explains the purpose of the M1 & M2 terminals on the control.
Detailed steps for removing and reinstalling the secondary heat exchanger.
Detailed steps for removing and reinstalling the primary heat exchanger.
Basic model details like gas type, transformer size, and BTU ratings.
Details on orifices, gas valve, manifold pressures, and pilot size.
Information on flue outlet size, temperature, and blower/transition box pressures.
Data on rollout switches, limit settings, and pressure switch ratings.
Table showing switch settings for different airflow configurations and temperature adjustments.
Basic model details like gas type, transformer size, and BTU ratings.
Details on orifices, gas valve, manifold pressures, and pilot size.
Information on flue outlet size, temperature, and blower/transition box pressures.
Data on rollout switches, limit settings, and pressure switch ratings.
Graph of cooling airflow performance for 050 models.
Graph of high heat airflow performance for 050 models.
Graph of low heat airflow performance for 050 models.
Graph of cooling airflow performance for 075 models.
Graph of high heat airflow performance for 075 models.
Graph of low heat airflow performance for 075 models.
Graph of cooling airflow performance for 100 models.
Graph of high heat airflow performance for 100 models.
Graph of low heat airflow performance for 100 models.
Graph of cooling airflow performance for 125 models.
Graph of low heat airflow performance for 125 models.
Graph of high heat airflow performance for 125 models.
Airflow data for 050 models based on speed tap and ESP.
Airflow data for 075(A1) models based on speed tap and ESP.
Airflow data for 100 models based on speed tap and ESP.
Airflow data for 125 models based on speed tap and ESP.
Basic model details like gas type, transformer size, and BTU ratings.
Details on orifices, gas valve, manifold pressures, and pilot size.
Information on flue outlet size, temperature, and blower/transition box pressures.
Data on rollout switches, limit settings, and pressure switch ratings.
Airflow data for 075(A2) models based on speed tap and ESP.
Airflow data for 100 models based on speed tap and ESP.
Airflow data for 125 models based on speed tap and ESP.
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