Amana VR8205 installation instructions Burner BOX, Auxiliary Limit Control Figure

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BURNER BOX

This furnace must use indoor air for combustion. It is not a direct vent furnace, and it cannot be installed as a direct vent furnace. The burner box (on some models) is present only to reduce the burner sound transmission.

AUXILIARY LIMIT CONTROL (FIGURE 35)

A manual reset limit is located on the blower side of the blower deck, near the center. To access this auxiliary limit, disconnect the electrical power and remove the blower door. If the limit control opens, the air circulation blower will run continuously. The diagnostic light will flash four times. These symptoms are identical to a trip of the primary limit control. See Section X, Abnormal Operation - Integrated Ignition Control for diagnosis.

The auxiliary limit control is designed to prevent furnace operation in case of main blower failure on horizontal and counterflow installations. It may also open if the power supply is interrupted while the furnace is firing.

The auxiliary limit control is suitable for both horizontal right and horizontal left installations. Regardless of airflow direc- tion, it does not need to be relocated.

WARNING

To prevent death, personal injury or property damage due to fire, follow these directions for the auxiliary limit control. If the auxiliary limit control opens, it may be reset one time only.

(SERVICER’S NOTE: If it becomes necessary to slide the blower assembly out of the furnace, the auxiliary limit control should be removed first. After the blower assembly is reinstalled, the auxiliary limit must be reinstalled.)

Figure 35

Auxiliary Limit Control

ABNORMAL OPERATION - INTEGRATED IGNITION CONTROL

The following presents the probable causes of question- able furnace operation and how to fix them. Look through

the observation window in the blower access door and make a note of the number of flashes in sequence between pauses. Next, refer to the Diagnostic Signal Chart for an interpretation of the signals and to this section for a descrip- tion.

1.Internal Control Failure with Integrated Ignition Control

An internal control failure occurs when the integrated ignition control senses an internal problem and stops the unit.

To solve this problem, replace the ignition control.

2.System Lockout

A system lockout occurs when the integrated ignition control determines that a measurable combustion can- not be established or maintained after three consecu- tive tries (four, if flame is established then lost) to turn on the furnace.

If a flame is not sensed during the first six seconds after a gas valve has been energized, the ignition control will internally turn off the gas. After 60 seconds, during which time the induced draft blower purges the heat exchanger, the ignitor will re-energize and preheat for 27 seconds. The gas valve is then re-energized. If a flame is not sensed again in six seconds, the gas valve will de-energize and another purge is performed. The ignition control will cycle the gas valve three times before it determines it cannot establish measurable combustion and enter a lockout state. If a flame is sensed but lost after 10 seconds, the control will cycle four more times before locking out. A lockout stops ignition attempts and causes the air blower to run continuously. The diagnostic light will indicate either condition with one short flash followed by a longer off.

The control can be reset and brought out of lockout mode by turning the thermostat off and then back on. It can also reset by turning off the electrical disconnect switch to the furnace for 30 seconds. The control will reset after one hour.

IMPORTANT: If you have to frequently reset your furnace, it means that a problem exists that should be corrected. Contact a qualified servicer for further information.

3.Pressure Switch Stuck Closed

A sticking pressure switch can be caused by either a faulty pressure switch, faulty wiring, a disconnected hose, or a restricted intake or flue piping. In the case of a pressure switch sticking closed, the probable cause is a faulty pressure switch or wiring.

If the ignition control senses that the pressure switch is closed and the induced draft blower is off, it will shut down the unit until the fault is corrected. The light code for this problem is two short flashes followed by a longer pause.

4.Pressure Switch Stuck Open

A sticking open pressure switch can be caused by a faulty pressure switch, a disconnected hose to the pressure switch, a restricted air intake or flue piping, or a faulty wiring.

If the ignition control senses that the induced draft blower is energized but the pressure switch is not closed, the control will keep the blower on and wait for the switch to close. The diagnostic light code for this problem is three short flashes followed by a pause.

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Contents Table of Contents Installation InstructionsTo The Owner To The InstallerAdditional Safety Considerations Safety and Unit LocationIII. Air Requirements II. General InformationPage Louvers and Grilles Specially Engineered InstallationsIV. Category I Venting Vertical Venting Counterflow Rotated Induced Draft Blower Upflow Rotated Induced Draft BlowerTypical Multiple Flue Clay Tile Chimney Blower AssemblyMasonry Chimneys Check 1 Proper Chimney Termination Checklist SummaryTermination 10 Feet Or Less From Ridge Wall or Parapet Check 3 Chimney Crown Condition Check 4 Debris in CleanoutTermination More Than 10 Feet From Ridge Wall or Parapet Check 5 Liner ConditionFIX 2 -CHANGE Venting Arrangements Check 7 Complete the InstallationCheck 6 Dilution AIR FIX 1 Liner TerminationGAS Piping VI. Gas PipingGas Inlet Through Furnace Bottom Side Upflow Upflow InstallationsGeneral Furnace Layout Gas Inlet Through Furnace Right SideGas Inlet Through Right Side Counterflow Counterflow InstallationsTanks and Piping Propane GAS Units Propane Gas Installation TypPropane GAS Piping Charts Checking GAS PipingJunction Box VIl. Electrical WiringTypical Field Wiring VAC Control Circuit Junction Box Left SideAIR Circulation Blower FAN Timing Heating Fan Off AdjustmentsLow Voltage TerminalsControl Module Line Voltage Connection for AccessoriesHeat Anticipator Setting VIlI. Circulating Air and FiltersFurnace Mounted Filter Rack Return Air Plenum InstallationUpflow/Horizontal Furnaces Bottom Return Filter SizesRefer to Abnormal Integrated Ignition Control Diagnostic Signal ChartTiming Chart for Normal Cooling Operation Light Signal Operation NumberCounterflow Furnaces Start-Up, Adjustments, and ChecksIX. Sequence of Operation Integrated Ignition Control Rollout Protection Device Right To Left InstallationLeft To Right Installation Abnormal Operation Integrated Ignition Control Auxiliary Limit ControlBurner BOX Auxiliary Limit Control FigureOperating Instructions Gas ValvesHoneywell Model VR-8205 White Rodgers Model 36E36 Robertshaw ModelMeasuring Inlet Gas Pressure Alternate Method White Rodgers Model 36E22High Limit Control AIR Filter Upflow Furnaces XI. MaintenanceFilter Removal AIR FilterFurnace mounted Filter Rack Counterflow General Information Cleaning of Burners Qualified Servicer onlyBurner Flame Burners

VR8205 specifications

The Amana VR8205 is a robust and innovative gas valve designed for use in a variety of heating applications, particularly in residential and commercial HVAC systems. This versatile valve offers a combination of advanced technologies and user-friendly features, making it a popular choice among HVAC professionals and system installers alike.

One of the key features of the Amana VR8205 is its two-stage operation, allowing for precise control of gas flow. The dual-stage design enables the valve to modulate the gas supply based on the heating demand, which enhances system efficiency and promotes better temperature regulation. This feature not only contributes to energy savings but also helps maintain a comfortable indoor environment.

Additionally, the VR8205 is equipped with a strong, durable body construction that ensures reliability and longevity. Designed to withstand harsh operating conditions, the valve’s materials are resistant to corrosion and wear, making it suitable for various applications. The robust design of the Amana VR8205 minimizes the likelihood of leaks or failures, providing peace of mind to both installers and end-users.

The valve operates on low voltage, typically requiring 24 volts, which makes it energy-efficient and compatible with most modern thermostatic control systems. This low-voltage operation also simplifies installation, as it reduces the complexity and requirements for the electrical setup.

Another noteworthy characteristic of the Amana VR8205 is its integrated safety features. It includes a combination of automatic and manual shut-off mechanisms, providing an added layer of safety in case of malfunctions. This ensures that the gas supply can be quickly halted in emergency situations, protecting both people and property.

Moreover, the Amana VR8205 is designed for easy maintenance, featuring simple access points for servicing and troubleshooting. This ease of maintenance is crucial for HVAC professionals, as it allows for quick adjustments and repairs, ultimately reducing downtime.

Lastly, the Amana VR8205 has a reputation for adaptability, being compatible with various heating appliances, including furnaces, boilers, and water heaters. Its versatility makes it an excellent solution for a wide range of heating applications, ensuring optimal performance across different systems.

In summary, the Amana VR8205 gas valve is characterized by its two-stage operation, durable construction, low-voltage functionality, integrated safety mechanisms, and ease of maintenance. These features combine to offer a reliable, efficient, and flexible solution for modern heating needs.
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