VENT ATTENUATION ASSEMBLY
INSTALLATION INSTRUCTIONS
The Vent Attenuation Assembly (VAA) is designed to provide a reduction in fan noise created in the blower wheel. This installation of this VAA is optional. Review directions thoroughly prior to installing the new VAA. Please contact the manufacturer of the water heater as shown in the instruction manual with any questions or for additional product support.
VENT ATTENUATION ASSEMBLY KIT PARTS LIST
The kit consists of the following items. If a part is missing, use the contact information in the instruction manual to acquire missing component(s).
•vent attenuation assembly
•flexible tubing
•hose barb
•hex plug (installed on VAA)
•instruction sheet
VENT ATTENUATION ASSEMBLY INSTALLATION
The VAA is designed for both vertical and horizontal installations. The vertical installation does not require the additional hose barb and flexible tubing. However, the horizontal installation will require the hose barb and flexible tubing to release condensate buildup from the VAA. See instructions and diagrams that follow for a more detailed description.
supplied with kit) that may be found at a local hardware store. Failure to properly support the VAA and the surrounding vent pipe could create a hazardous situation. DO NOT puncture any surface of the VAA.
5.Confirm that the hex plug is securely installed in the 1/2” fitting found on the center of the VAA pipe. It is imperative that the plug is secure and air tight to prevent any combustion gases escaping into the room. If the plug is not securely tightened, remove and reinstall using Teflon tape on the threads. Since neither hose barb nor flexible tubing is used on the VAA, any unused open barb fittings on vent pipe assembly #2 need to be plugged using
Breathing Hazard - Carbon Monoxide Gas
•Do NOT block the holes in the hex plug of vent pipe assembly #1.
•Do NOT elevate any portion of the field supplied drain line beyond the 1/2" adaptor above the adaptor. This
must be true for entire length of the drain line including the exit into an appropriate drain.
• Condensate lines must be free and clear of debris and must not allow back flow through drain line. Condensate lines must be able to flow freely to an appropriate drain.
• Do not allow condensate lines to become crimped closed.
• Analyze entire vent system to make sure that condensate will not become trapped in a section of vent pipe and therefore reduce open cross sectional area of vent.
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
Vertical VAA Installations (Recommended)
1.The VAA is designed to accept two inch PVC pipe into the adapters on both ends. The VAA can be installed to the piping from either side (there is no specific inlet or outlet). For optimum performance, install VAA as close as possible to the blower assembly.
2.Following the vent pipe manufacturer ’s instruction, glue the two inch PVC pipe coming from the blower into the VAA.
3.Perform the same sequence on the PVC pipe coming from the exhaust side (vent terminal side) of the VAA.
4.Make sure the VAA and vent pipe is supported securely to a permanent fixture (stud or wall). Use standard support straps (not
FIGURE 22: Typical Vertical Installation
Horizontal VAA Installations
1.The VAA is designed to accept two inch PVC pipe into the adapters on both ends. The VAA can be installed to the piping from either side (there is no specific inlet or outlet). For optimum performance, install VAA as close as possible to the blower assembly.
2.Following the vent pipe manufacturer’s instruction, glue the two inch PVC pipe coming from the blower into the VAA. Make sure the 1/2” fitting is on the bottom side of the VAA. This will be used to run the condensate hose to a suitable drain. See typical vent installation in Figure 23.
3.Perform the same sequence on the PVC pipe coming from the exhaust side (vent terminal side) of the VAA.
4.Make sure the VAA and vent pipe is supported securely to a permanent fixture (stud or wall). Use standard support straps (not supplied with kit) that may be found at a local hardware store. Failure to properly support the VAA and the surrounding vent pipe could create a hazardous situation. DO NOT puncture any surface of the VAA.
5.Remove hex plug from the center pipe of the VAA. Locate the hose barb and install into the 1/2” fitting on the center of the VAA. Using Teflon tape on the threads, install hose barb into 1/2” fitting securely. It is imperative that the hose barb is secure and tight to prevent any combustion gases escaping into the room.
6.Locate flexible tubing. Slide one end of tube over the hose barb located on the center pipe of the VAA. The ridges on the hose barb should prevent the tube from sliding off, however, to ensure there are no leaks and possible dislocation from hose barb, use a wire tie or hose clamp (not supplied with kit) and secure.
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