Installation, Converting A Class-Ametal Chimney Or, General

INSTALLATION

Using a level, make sure the support is vertical. If the support extends above the roof, cut it ﬂ ush with the top of the roof. Nail the support to the frame opening using (8) 3" spiral nails or #8 x 1-1/2" screws.

Note: If you are using a 6" square support you may ﬁnd it difﬁcult to screw it in place because it is fairly small inside.

Simpson Dura-Vent has provided angle brackets with this support which can be screwedtotheoutsideofthesupportboxand nailed to surrounding framing as required. Use a minimum of four #8 x 1/2" screws per bracket. In some cases these brackets may need to be trimmed (e.g.: to ﬁ t under a ﬂ ashing). Place the Finish Collar around the support and fasten it to the ceiling using the screws provided.

3)Use appropriate roof ﬂ ashing. Place the ﬂashing under the upper shingles and on top of the lower shingles approximately half of the ﬂ ashing should be under the shingles.

4)Assemble the desired lengths of Black Pipe and Elbows necessary to reach from the appliance adaptor up through the support box and ﬂ ashing to proper height as per Dia. 12, local codes or the "Rigid Pipe Venting Arrangements" section. Ensure that all pipe and elbow connections are in their fully twist lock position.

5)Ensure vent is vertical and secure ﬂashing to the roof with rooﬁ ng nails. Slide the storm collar over the pipe section and seal with a mastic.

6)Twist lock the vent cap on to the last section.

Support Extensions - Round

(RDSE) or Square (SQSE)

Steep pitched cathedral ceilings may require the use of a support extension. This piece ﬁ ts down inside the support and can be adjusted to increase the support's length by up to 22". The extension is attached to the support using the eight metal screws provided. Be sure there is at least a 2 inch overlap where the extension joins the support.

CONVERTING A

CLASS-A METAL

CHIMNEY OR

MASONRY CHIMNEY TO A DIRECT VENT SYSTEM

General

There are two different types of direct vent conversion systems listed below. Follow the appropriate directions for your installation.

A)Through an existing factory built metal chimney going through the ceiling: A typical conversion of this type is shown in diagram 1. The concept of direct vent conversion is to connect an adaptor to an Underwriters Laboratories (UL) listed 4 inch diameter aluminum ﬂ ex pipe which is then passed down through the center of the existing metal chimneysystem.ThreesizesofTopAdaptors are available from Simpson Dura-Vent. The Retro Connector (909B) is attached to the bottom of the ﬂ ex pipe. The Top Adaptor and the Retro Connector are attached to the existing chimney with sheet metal screws. The appliance is then connected to the chimney with appropriate black direct vent pipe and an adjustable length section.

B)Through the wall of an existing masonry chimney: A typical conversion of an existing masonry chimney is shown in Diagram 6. A TopAdaptor (985K) and Flashing are used at the top of the masonry chimney. The 4 inch aluminum liner is connected to the adaptor and is passed down the chimney and out through the masonry wall and attached to the Retro Connector (909B). The Retro Connector is attached to the masonry wall and then connected to the direct vent pipe leading to the appliance.

Prior to installation and connection of the vent system to a factory-built or masonry chimney, the chimney must be inspected and thoroughly cleaned by a qualiﬁed service person, such as a certiﬁed chimney sweep or home inspection service.

Thedirectventsystemmustnotbeconnected to a damaged factory-built or masonry chimney.

Forfactorybuilt,zeroclearance,andmasonry chimneys cleanout doors and caps or plugs for cleanout tee ﬁttings and ash dumps shall be secured in place and sealed before installing a Direct Vent system within the chimney.

If the appliance shuts off during operation, contact a qualified service person to determine if a negative pressure and/or leaky chimney condition exists. Do not operate the appliance until the problem is corrected.

Approved for US Installations Only

The use of an existing chimney as an air intake is not coveredunder theANSI Z21.88b- 1999, CSA 2.33b-M99 test methods and the resulting ITS/WHI product certiﬁcation. The code Authority Having Jurisdiction must be consulted prior to proceeding with this installation method.

Converting a Factory Built Metal

Chimney

1)Remove the existing chimney cap.

2)Measure the distance from the top end of the chimney to the bottom of the ceiling support box, add 3" (76mm) to this measurement, and cut a section of the 4" ﬂ ex pipe to that length (the ﬂ ex should already be extended to its nominal length).

Diagram 1

3) Connect the end of the ﬂ ex pipe section to the underside of the Top Adaptor using 3 sheet