5.Open Limit Control (Primary or Auxiliary)

An open limit control can be caused by a low condi- tioned air flow due to dirty filter or resistance in duct work, a faulty blower, a blower speed set too low, or a faulty limit.

When the limit control opens, the induced draft and air circulation blowers are turned on. The induced draft blower will remain on for the first fifteen seconds of this period. The air circulation blower will remain on until the limit control is closed. The diagnostic light code for this is four short flashes followed by a pause.

6.Open Rollout Control

An open rollout control is can be caused by insufficient combustion air, a restricted flue passage, or a re- stricted heat exchanger.

The opening of the rollout control signals the air circu- lation blower and the induced draft blower to turn on. The air circulation blower will remain on until the limit is manually reset. The induced draft blower will remain on for the first fifteen seconds of this period. The diagnostic light code for this is five short flashes followed by a pause.

7.Flame Sensed with No Call for Heat

If the control senses a flame when the gas valve is de- energized, it will run the air circulation blower and the induced draft blower continuously. The diagnostic light code for this is continuous light flashing. Probable cause is miswiring.

OPERATING INSTRUCTIONS

1.Close the manual gas valve external to the furnace.

2.Turn off the electrical power supply to the furnace.

3.Set room thermostat to lowest possible setting.

4.Remove the door on the front of the furnace.

Note: This furnace is equipped with an ignition device to automatically light the burners. Do not try to light burners by hand.

5.Honeywell Model VR8205, or White Rodgers Model 36E36, or Robertshaw Model 7222: Turn the gas

control knob clockwise to the OFF position. Note: The knob should turn easily. Do not use exces- sive force.

White Rodgers Model 36E22: Push the switch to the OFF position.

6.Wait five minutes to clear out any gas. Then smell for gas, including near the floor.

7.If gas can be smelled following the five minute waiting period in Step 6, immediately follow the instructions on Page 2 of this manual. If you do not smell gas after five minutes:

Honeywell Model VR8205, or White Rodgers Model 36E36, or Robertshaw Model 7222: Turn the gas

control knob counterclockwise to the ON posi- tion. The knob should turn easily. Do not use exces- sive force.

White Rodgers Model 36E22: Push the switch to the ON position.

8.Replace the door on the front of the furnace.

9.Open the manual gas valve external to the furnace.

10. Turn on the electrical power supply to the furnace.

11. Set the room thermostat to the desired temperature.

NOTE: There is an approximate 20 second delay between thermostat energizing and burner firing.

Gas Valves

Figure 36

Honeywell Model VR-8205

Figure 37

White Rodgers Model 36E36

Gas Control

 

 

 

Valve Lever

 

 

 

 

Outlet Pressure Tap

 

 

 

(In ON Position)

 

 

 

 

(Side of Valve)

 

 

 

 

 

 

OUTLET

INLET

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pressure Regulator

Adjustment (Under

Cap Screw)

Inlet Pressure Tap

Figure 38

Robertshaw Model 7222

24

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Amana VR8205 Gas Valves, Honeywell Model VR-8205 White Rodgers Model 36E36, Robertshaw Model, Operating Instructions
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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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