Friedrich R-410A service manual Heat Load Form, Following is an example using the heat load form

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HEAT LOAD FORM

The heat load form on the following page may be used by servicing personnel to determine the heat loss of a conditioned space and the ambient winter design temperatures in which the unit will heat the calculated space.

The upper half of the form is for computing the heat loss of the space to be conditioned. It is necessary only to insert the proper measurements on the lines provided and multiply by the given factors, then add this result for the total heat loss in BTU/Hr./°F.

The BTU/Hr. per °F temperature difference is the 70°F inside winter designed temperature minus the lowest outdoor ambient winter temperature of the area where the unit is installed. This temperature difference is used as the multiplier when calculating the heat loss.

The graph shows the following:

Left Hand Scale

Unit capacity BTU/Hr. or heat loss

 

BTU/Hr.

Bottom Scale

Outdoor ambient temperature, base

 

point.

Heat Pump Model

BTU/Hr. capacity heat pump will

 

deliver at outdoor temperatures.

Balance Point

Maximum BTU/Hr. heat pump

 

will deliver at indicated ambient

 

temperature.

Following is an example using the heat load form:

A space to be conditioned is part of a house geographically located in an area where the lowest outdoor ambient winter temperature is 40°F. The calculated heat loss is 184 BTU/ Hr./°F.

Subtract 40°F (lowest outdoor ambient temperature for the geographical location) from 70°F (inside design temperature of the unit) for a difference of 30°F. Multiply 184 by 30 for a 5500 BTU/Hr. total heat loss for the calculated space.

On the graph, plot the base point (70°) and a point on the 40°F line where it intersects with the 5500 BTU/Hr. line on the left scale. Draw a straight line from the base point 70 through the point plotted at 40°F. This is the total heat loss line.

Knowing that we have a 5500 BTU/Hr. heat loss, and we expect that our heat pump will maintain a 70°F inside temperature at 40°F outdoor ambient, we plot the selected unit capacity BTU/Hr. of the unit between 35° and 60° on the graph and draw a straight line between these points. Where the total heat loss line and the unit capacity line intersect, read down to the outdoor ambient temperature scale and find that this unit will deliver the required BTU/Hr. capacity to approximately 30°F.

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Contents Heat Pump Volt YS10M10 Cool OnlyCool with Electric Heat Heat Pump with Electric HeatTable Of Contents Your safety and the safety of others are very important Important Safety InformationRefrigeration System Repair Hazards Property Damage Hazards Model and Serial Number Location IntroductionUnit Identification Performance Data SpecificationsInstallation Information / Sleeve Dimensions Fire Hazard Electrical DataElectric Shock Hazard Make sure the wiring is adequate for your unit Control Panel Operation Special Functions System Exit Back FAN Mode Speed Display Schedule Enter Key Sequence Action Digital Control Panels Access Codes SummaryRemote Control Operation Remote Control Operation Introduction Electronic Control System MaintenanceElectronic Control System Maintenance Operation Following functions Can be Tested Test mode BypassesFactory USE only To Clear Error Codes’ HistoryFront Panel Unit OperationSystem Set Point Mapping Figure COOL-HEAT SET PointsCompressor Operation Electronic Control Sequence of OperationHeat Control Heat Pump Only Heating Mode Control OperationCondition Heat Pump With Electric Heat OperationElectric Heat Operation in Cool with Electric Heat Units Compressor Lock Out Time Fan Mapping Unit Operation with a WALL-STAT During Heat ModeRemoving the Front Cover Swing Out Replacing the Indoor Coil ThermistorConnecting a Remote Wall Thermostat Remote Wall Thermostat Location Capacitor Connections Components TestingCapacitors Capacitor Check with Capacitor AnalyzerDrain PAN Valve Testing the Heating Element Electric Shock HazardHeating Element Heating Element Heat Pump ModelsRefrigeration Sequence of Operation Refrigeration system under high pressure 410A Sealed System Repair ConsiderationsRisk of Electric Shock 410A Sealed Refrigeration System RepairsEquipment Required Equipment Must be CapableFreeze Hazard Method Of Charging / RepairsBurn Hazard Overcharged Refrigerant Systems Undercharged Refrigerant SystemsRestricted Refrigerant System Capillary Tube Systems Hermetic Components CheckMetering Device Check ValveReversing Valve DESCRIPTION/OPERATION Checking the Reversing Valve Testing the Reversing Valve Solenoid CoilReversing Valve in Heating Mode Explosion Hazard Procedure For Changing Reversing ValveTouch Test in Heating/Cooling Cycle Compressor Checks Checking Compressor Efficiency Single Phase Resistance TestGround Test High Temperatures Compressor ReplacementRecommended procedure for compressor replacement High Pressure Hazard Routine Maintenance Clearances Sleeve / DrainDecorative Front Cover Standard Filter Cleaning Installation Instructions Battery type Lithium, 3 Volts, #CR2450 Control Panel Battery Change ProcedureService and Assistance Room AIR Conditioner Unit Performance Test Data Sheet Icon Error Codes and Alarm StatusProblem Possible Cause Possible Solution Troubleshooting TipsTroubleshooting Tips Problem Possible Cause Possible Solution Cooling only Room AIR Conditioners Troubleshooting TipsReplace fuse, reset breaker. If repeats, check Possible Cause Possible Solution Problem Possible Cause Possible Solution Bad outdoor coil thermistor Replace thermistor Heat / Cool only Room AIR Conditioners Troubleshooting TipsProblem Possible Cause Action Heat Pump Room AIR Conditioners Trouble Shooting TipsTroubleshooting Chart Heat Pump YES Electrical Troubleshooting Chart Heat PumpSystem Cools When Heating is Desired Heat PumpMalfunction of Valve Normal Function of ValveDischarge Electronic Control Board Components IdentificationCool W/O Electric Heat Remote Wall Thermostat Wiring DiagramsKuhl Electronic Control Cool only Models SchematicSL28M30A, SL36M30A ES12M33A, ES15M33A EM18M34A, EM24M34A KUHL+ Electronic Control Cool with Electric Heat ModelsEL36M35A KUHL+ Electronic Control Cool with Electric Heat ModelYS10M10A KUHL+ Electronic Control Heat Pump only ModelHeat YL24M35A KUHL+ Electronic Control Heat Pump with Electric Heat ModelThis Table Applies to All Thermistors THERMISTORS’ Resistance ValuesReplacement Remote Control Configuration Instructions Checking the Remote Control’s OPT # Code Replacement Instructions Aham PUB. NO. RAC-1 DAY Cooling Load Estimate FormHeat Gain from Quantity Factors Heat Load Form Following is an example using the heat load formInfiltration Windows & Doors AVG Heating Load Form Friedrich Room Unit Heat PumpsWindows & Doors Area, sq. ft Room AIR Conditioners Limited Warranty Technical Support Contact Information Friedrich AIR Conditioning CO
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R-410A specifications

Friedrich R-410A is an advanced refrigerant widely used in HVAC (Heating, Ventilation, and Air Conditioning) systems, known for its high efficiency and environmental friendliness. As a hydrofluorocarbon (HFC) blend, R-410A has become the preferred alternative to R-22, which is being phased out due to its ozone-depleting potential. One of the main features of R-410A is its high latent heat of vaporization, which allows for efficient heat transfer and improved cooling performance in air conditioning units.

Technologically, R-410A operates at higher pressures than older refrigerants, meaning systems designed for R-410A need to be built with more robust components to safely handle these pressures. This results in a more compact system design that offers enhanced performance and reliability. The dual-component nature of R-410A—composed of difluoromethane (R-32) and pentafluoroethane (R-125)—provides an optimal balance of thermodynamic properties, leading to superior energy efficiency, especially in variable speed applications.

In terms of characteristics, R-410A has a higher cooling capacity, which enables HVAC systems to effectively cool larger spaces or run more efficiently when cooling smaller areas. The refrigerant is non-toxic and non-flammable, which enhances safety during its use. In addition, R-410A has a lower global warming potential relative to other refrigerants, making it a more environmentally responsible choice for modern cooling systems.

Moreover, R-410A systems typically require less refrigerant charge due to their efficiency, contributing to reduced greenhouse gas emissions. The adoption of R-410A aligns with regulatory trends aimed at minimizing the environmental impact of refrigerants in cooling applications.

Overall, the Friedrich R-410A refrigerant embodies a combination of technology and environmental stewardship, making it a cornerstone of contemporary HVAC design. Its ability to provide effective and energy-efficient cooling solutions while being compliant with modern environmental regulations positions R-410A as the refrigerant of choice for engineers and installers focused on sustainability and performance in air conditioning systems.
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