Upflow Rotated Induced Draft Blower

The minimum vent diameter for the Category I venting system is as shown below:

MINIMUM VENT DIAMETER

MODEL	GUI*	GCI*
45	3 Inch	4 Inch
70	4 Inch	4 Inch
90	4 Inch	4 Inch
115	5 Inch	5 Inch
140	5 Inch	5 Inch

Under some conditions, larger vents than those shown above may be required or allowed.

When an existing furnace is removed from a venting system serving other appliances, the venting system may be too large to properly vent the remaining attached appliances.

The following steps shall be followed with each appliance remaining connected to the common venting system placed in operation, while the other appliances remaining con- nected to the common venting system are not in operation.

(a)Seal any unused openings in the common venting system.

(b)Visually inspect the venting system for proper size and horizontal pitch as required in the National Fuel Gas Code, ANSI Z223.1, or the CAN/CGA B149 Installation Codes and these instructions. Determine there is no blockage or restriction, leakage, corrosion or other deficiencies which could cause an unsafe condition.

(c)Where practical, close all building doors, windows, and all doors between the space where the appliances remain connected to the common venting system are located and other spaces of the building. Turn on all gas appliances not connected to the common venting sys- tem and operate on high speed all exhaust fans (range hoods and bathroom), except summer exhaust fans. Close fireplace dampers.

(d)Following the lighting instructions, place the furnace being inspected in operation. Adjust thermostat so appliance will operate continuously.

(e)Test for spillage at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle, or smoke from a cigarette, cigar, or pipe.

(f)After it has been determined that each appliance re- maining connected to the common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-burning appliance to their previous con- ditions of use.

(g)If improper venting is observed during any of the above tests, the common venting system must be corrected in accordance with the latest edition of the National Fuel Gas Code, ANSI Z223.1.

When resizing any portion of the common venting system, use the appropriate table in Appendix G in the latest edition of the National Fuel Gas Code, ANSI Z223.1.

Upflow or Horizontal units are shipped with the induced draft blower discharging from the top of the furnace. (“Top” is as viewed for an upflow installation.) The induced draft blower can be rotated 90 degrees counterclockwise for Category I venting, with the airflow horizontal left to right (Figure 5). For horizontal installations, a 4-inch single wall pipe can be used to extend the induced draft blower outlet

1/2” beyond the furnace cabinet. Vent the furnace in accordance with the National Fuel Gas Code, NFPA54/ ANSI Z223.1 - latest edition. In Canada, vent the furnace in accordance with the National Standard of Canada, CAN/ CGA B149 - latest editions and amendments.

Figure 5

Counterflow units are shipped with the induced draft blower discharging from the top of the furnace. (“Top” as viewed for an counterflow installation.) The induced draft blower can be rotated 90 degrees counterclockwise for Category I venting, with the airflow horizontal right to left (Figure 6). For horizontal installations, a 3-inch B-vent pipe can be used to extend the induced draft blower outlet 1/2” beyond the furnace cabinet. Vent the furnace in accor- dance with the National Fuel Gas Code, NFPA54/ANSI Z223.1 - latest edition. In Canada, vent the furnace in accordance with the National Standard of Canada, CAN/ CGA B149 - latest editions and amendments.

Vent

Supply

Return

Air

Figure 6

Counterflow Rotated Induced Draft Blower

To rotate the induced draft blower counterclockwise pro- ceed as follows:

1. Disconnect electrical power from furnace.

WARNING

To prevent death or personal injury due to electrical shock, disconnect electrical power.

2.Remove the round cutout from the side of the furnace.

Note: The assembly, starting from the outside, is induced draft blower, outer gasket, rotation plate, inner gasket, partition panel (See Figure 7).

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.

Amana VR8205 Upflow Rotated Induced Draft Blower, Counterflow Rotated Induced Draft Blower

Models: VR8205