Amana VR8205 IX. Sequence of Operation Integrated Ignition Control, Counterflow Furnaces

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CAUTION

To prevent personal injury, use only blunt pointed screws to attach the plenum to the furnace and filter rack. Screws should not be placed where they could interfere with filter replacement.

 

Dimension

"A",

M inimum R

ecommended

Siz e_ Air

Inches

 

F ilter Siz

es,

Inches

F low

 

 

 

 

 

T hrow aw ay

Perm.

F iberglass

 

Permanent

 

T hrow aw ay

 

 

 

 

 

 

 

 

 

 

 

 

045_30

15-1/2

8

(2) 16x 20x 1

 

(2) 10x 20x 1

 

 

 

 

 

 

070_30

15-1/2

8

(2) 16x 20x 1

 

(2) 10x 20x 1

 

 

 

 

 

 

070_40

19-3/4

8

(2) 20x 20x 1

 

(2) 10x 20x 1

 

 

 

 

 

 

090_30

14-1/4

13

(2) 16x 20x 1

 

(2) 15x 20x 1

 

 

 

 

 

 

090_50

24-1/4

13

(2) 25x 20x 1

 

(2) 15x 20x 1

 

 

 

 

 

 

115_40

17-3/4

11

(2) 20x 20x 1

 

(2) 15x 20x 1

 

 

 

 

 

 

115_50

23-1/2

11

(2) 25x 20x 1

 

(2) 15x 20x 1

 

 

 

 

 

 

140_50

23-1/2

11

(2) 25x 20x 1

 

(2) 15x 20x 1

 

 

 

 

 

 

9.After a 15 second delay while flue products are purged from the furnace heat exchanger, the induced draft blower motor is de-energized.

10.The air circulation blower has an adjustable delay-off timing of 60, 90, 120 or 180 seconds (starting from the time the gas valve closes). This allows more heat from the furnace to be transferred to the conditioned space. After this time has elapsed, the blower will be de- energized.

NORMAL COOLING SEQUENCE - INTEGRATED IGNITION CONTROL

With the room thermostat in the FAN-AUTO position, the indoor air circulation blower and outdoor condensing unit will be energized when a call for cooling occurs. When the call for cooling ends, the outdoor condensing unit will be de- energized. The indoor air circulation blower will continue to run for 45 seconds.

OTHER ITEMS

Constant Fan. During normal operation, the air circu- lation blower will continually run at “Cooling” speed as long as power is present at terminal G. If a call for heat occurs, the blower will run at heating speed throughout the heating cycle.

Figure 30

Counterflow Furnaces

3.With the air flow direction arrow pointing toward the furnace, insert the filters from the left side of the blower. Starting with the right filter, push the filter into the plenum so the bottom of the filter fits into the filter rack and the upper edge rests against the side of the plenum. Repeat with the left filter (Figure 29).

OTHER FILTER OPTIONS

External filter grilles can be used instead of the filter rack.

IX. Sequence of Operation (Integrated Ignition Control)

Refer to Timing Charts for sequencing.

NORMAL HEATING SEQUENCE

1.Thermostat calls for heat.

2.The induced draft blower is energized.

3.The ignitor is energized and is allowed to preheat for 17 seconds.

4.The gas valve is energized delivering gas to the burners and starting combustion.

5.The control checks for a signal from the flame sensor within seven seconds after the gas valve is energized. Gas will only continue to flow if a signal is present.

6.The control waits 30 seconds and turns on the air circulation blower to the speed that was selected for heating operation.

7.The thermostat is satisfied and opens.

8.The control de-energizes the gas valve.

21

If a trip on high/auxiliary/rollout limit occurs, the air circulation blower will run at “Heating” speed. Even if power is present at terminal G, the blower will run at heating speed until the limit closes.

X. Start-Up, Adjustments, and Checks

GENERAL OPERATION

This furnace is equipped with an electronic ignition device to light the burners and an induced draft blower to exhaust combustion products.

An interlock switch prevents furnace operation if the blower door is not in place. Keep the blower access doors in place except for inspection and maintenance.

This furnace is also equipped with a self-diagnosing elec- tronic control module. In the event a furnace component is not operating properly, the control module LED will flash on and off in a factory-programmed sequence, depending on the problem encountered. This light can be viewed through the observation window in the blower access door. Refer to the Diagnostic Signal Chart for further explanation of the lighting codes and Section X, Abnormal Operation - Integrated Ignition Control for an explanation of the pos- sible problem.

On new installations, or if a functional part such as the gas valve, pressure switch, or limit control has been replaced, verify that the furnace is operating properly after servicing.

Check furnace operation as outlined in the following in- structions. If any sparking, odors, or unusual noises are encountered, shut off electrical power and recheck for wiring errors, or obstructions in or near the blower motors. Various shipping materials must be removed before the blower motor is operated.

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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 Specially Engineered Installations IV. Category I Venting Vertical VentingLouvers and Grilles Counterflow Rotated Induced Draft Blower Upflow Rotated Induced Draft BlowerBlower Assembly Masonry ChimneysTypical Multiple Flue Clay Tile Chimney Checklist Summary Termination 10 Feet Or Less From Ridge Wall or ParapetCheck 1 Proper Chimney Termination Termination More Than 10 Feet From Ridge Wall or Parapet Check 4 Debris in CleanoutCheck 5 Liner Condition Check 3 Chimney Crown ConditionCheck 6 Dilution AIR Check 7 Complete the InstallationFIX 1 Liner Termination FIX 2 -CHANGE Venting ArrangementsGAS Piping VI. Gas PipingGeneral Furnace Layout Upflow InstallationsGas Inlet Through Furnace Right Side Gas Inlet Through Furnace Bottom Side UpflowGas Inlet Through Right Side Counterflow Counterflow InstallationsPropane GAS Piping Charts Propane Gas Installation TypChecking GAS Piping Tanks and Piping Propane GAS UnitsTypical Field Wiring VAC Control Circuit VIl. Electrical WiringJunction Box Left Side Junction BoxLow Voltage Heating Fan Off AdjustmentsTerminals AIR Circulation Blower FAN TimingHeat Anticipator Setting Line Voltage Connection for AccessoriesVIlI. Circulating Air and Filters Control ModuleUpflow/Horizontal Furnaces Return Air Plenum InstallationBottom Return Filter Sizes Furnace Mounted Filter RackTiming Chart for Normal Cooling Operation Integrated Ignition Control Diagnostic Signal ChartLight Signal Operation Number Refer to AbnormalStart-Up, Adjustments, and Checks IX. Sequence of Operation Integrated Ignition ControlCounterflow Furnaces Right To Left Installation Left To Right InstallationRollout Protection Device Burner BOX Auxiliary Limit ControlAuxiliary Limit Control Figure Abnormal Operation Integrated Ignition ControlHoneywell Model VR-8205 White Rodgers Model 36E36 Gas ValvesRobertshaw Model Operating InstructionsMeasuring Inlet Gas Pressure Alternate Method White Rodgers Model 36E22High Limit Control Filter Removal XI. MaintenanceAIR Filter AIR Filter Upflow FurnacesFurnace mounted Filter Rack Counterflow Burner Flame Cleaning of Burners Qualified Servicer onlyBurners General Information

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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