Simpson DV-GS Instructions For Use And Safety

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APPLICATION
These instructions apply to the Simpson Dura-Vent Direct Vent System, Model DV-GS. This venting system, in combination with the gas appliance, has been tested and listed as a decorative gas appliance system, or as a direct vent heater system by a major testing agency such as UL, AGA, CGA, Omni or Warnock Hersey. Check the manufacturer's rating plate and instruction manual to confirm that the Simpson Dura-Vent direct vent system is approved for use on the brand name appliance you have selected.
IMPORTANT
Read all instructions carefully before starting the installation. Failure to follow these instructions may create a fire or other safety hazard, and will void the warranty. Be sure to check the appliance manufacturer's installation instructions for specific venting and clearance to combustible requirements, which may vary from one appliance to another. Do not extend the venting system vertically or
horizontally in excess of the distance prescribed in the appliance manufacturer's installation instructions.
INSTALLATION PRECAUTIONS
The Simpson Dura-Vent Direct Vent System is an engineered product that has been designed and tested for use with an approved list of direct vent fireplaces. The Simpson Dura-Vent warranty will be voided, and serious fire, health, or other safety hazards may result from any of the following actions:
• Installation of any damaged Direct Vent component.
• Unauthorized modification of the Direct Vent System
• Installation of any component part not manufactured or approved by Simpson Dura-Vent.
• Installation other than as instructed by Simpson Dura-Vent and the appliance manufacturer.
VENTING INSTRUCTIONS
FOR DIRECT VENT
FIREPLACES
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Consult your local building codes before beginning the installation.
WARNING
Always maintain required clearances (air spaces) to nearby
combustibles to prevent a fire hazard. Do not fill air spaces with insulation.
Be sure to check the appliance manufacturers's installation instructions for minimum clearance requirements between the outer walls of the vent pipe and nearby combustible surfaces. Be sure to check the vent termination clearance requirements from decks, windows, soffits, gas regulators, air supply inlets, and public walkways, as specified in these installation instructions and local building codes.
The fireplace and vent system must be vented directly to the
outside of the building. Each direct vent fireplace must use it's own separate vent system. Common vent systems are prohibited.
SAFETY PRECAUTIONS FOR THE INSTALLER
• Wear gloves and safety glasses for protection.
• Exercise extreme caution when using ladders or on roof tops.
• Be aware of electrical wiring locations in walls and ceilings.
PARTS LIST
The Simpson Dura-Vent Direct Vent System offers a complete line of component parts for installation of both horizontal and vertical installations. The galvanized pipe and fittings are used for concealed locations such as attics, or spaces where corrosion is a factor, such as above the roofline. Snorkel terminations are available for applications which may require vertical rise on the building exterior.
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PARTS LIST
Number Description
7" x 4" 8" x 5"
11008 1208 6" Pipe Length 11007 1207 9" Pipe Length 11006 1206 12" Pipe Length 11004 1204 24" Pipe Length 11003 1203 36" Pipe Length 11002 1202 48" Pipe Length 11017 1217 17" to 24" Pipe, Adjustable 11045 1245 45° Elbow 11090 1290 90° Elbow 11043 1243 Flashing, 0/12 to 6/12 Roof Pitch 11044 1243S Flashing, 7/12 to 12/12 Roof Pitch 11053 1253 Storm Collar 11063 1263 Ceiling Firestop 11042 1242 Wall Firestop 11088 1288 Wall Strap 11081 1281 Snorkel Termination (36") 11082 1282 Snorkel Termination (14") 11084 1284 Horiz. Square Termination 11030 1230 Horiz. Round Termination 11080 1280 Vertical Termination 11091 1291 Vert. Termination, High Wind 11050 1250 Vinyl Siding Standoff
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FIGURE 3
45° ELBOW
PIPE SECTION
PIPE SECTION
CEILING FIRESTOP
FIGURE 1
ROUND HORIZONTAL TERMINATION
SQUARE HORIZONTAL
TERMINATION
45° ELBOW
PIPE SECTION
WALL FIRESTOPS
WALL FIRESTOP
WALL
FIRESTOP
45° ELBOW
PIPE SECTION
90° ELBOW
WALL FIRESTOPS
ROUND HORIZONTAL TERMINATION
FIGURE 2
SQUARE
HORIZONTAL
TERMINATION
STORM COLLAR
VERTICAL TERMINA­TION
FLASHING
PIPE SECTION
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PLANNING YOUR INSTALLATION
There are two basic types of Direct Vent System installations. Check the appliance manufacturer's installation instructions to confirm what types are permitted, and also check for any venting restrictions such as maximum horizontal run, and maximum vertical rise. The two types of installations are:
• Horizontal Termination (Fig 1 and Fig 2)
• Vertical Termination (Fig 3)
When planning your installation, it will be necessary to select the proper length of vent pipe for your particular requirements. For horizontal installations, check the appliance manufacturers's installations instructions to determine the minimum clearance from the rear of the appliance to the wall. It is also important to note the wall thickness. Select the amount of vertical rise desired for "vertical-to-horizontal" type installations. To determine the length of vent pipe required for vertical installations, measure the distance from the appliance flue outlet to the ceiling, the ceiling thickness, the vertical rise in an attic or second story, and allow for sufficient vent height above the roofline. For two-story applications, firestops are required at each floor level. If an offset is needed in the attic, additional pipe and elbows will be required.
HORIZONTAL INSTALLATION
Step 1. Set the fireplace in it's desired location. Check to determine if wall
studs or roof rafters are in the way when the venting system is attached. If this is the case, you may want to adjust the location of the appliance.
Step 2. Direct Vent pipe and fittings are designed with special twist-lock
connections. To connect the venting system to the appliance flue outlet, a twist-lock appliance adaptor is required. With some brands of appliances, the Simpson Dura­Vent adaptor will be built into the appliance at the factory. With other brands, it will be supplied by the appliance manufacturer, for installation in the field. Assemble the desired combination of pipe and elbows to the appliance adaptor with pipe seams oriented towards the wall or floor, as much out of view as possible. If the appliance adaptor is not built into the appliance at the factory, it may be preferable to assemble the pipe and elbows to the adaptor prior to mounting the adaptor onto the fireplace. In this manner, the pipe and 45° elbow assembly may be properly
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twist-locked and rotated to face the wall termination, with final positioning of the vent pipe assembly determined by the mounting orientation of the appliance adaptor onto the fireplace. Figure 4 shows some of the possible vent pathway options. Consult the appliance manufacturer for any restrictions.
Notes:
(1) Twist-lock procedure: Four indentations, located on the female ends of pipes and fittings, are designed to slide straight onto the male ends of adjacent pipes and fittings, by orienting the four pipe indentations so they match and slide into the four entry slots on the male ends. (Fig
5). Push the pipe sections com­pletely together, then twist-lock one section clockwise approxi­mately one-quarter turn, until the two sections are fully locked.
SEALANT (OPTIONAL UNLESS REQUIRED BY APPLIANCE MANUFACTURER)
FEMALE LOCKING LUGS
MALE LOCKING LUGS
Fig 5
Fig 4
(2) Horizontal runs of vent must be supported every three feet. Wall Straps are
USE EITHER SQUARE HORIZONTAL OR ROUND HORIZONTAL TERMINATION CAPS
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available for this purpose.
(3) Sealant is optional, unless specified by the appliance manufacturer. Should you elect to use sealant, it is only necessary on the outer tube of the GS Pipe. Run a 1/8-inch wide bead of sealant around the male end of the outer sleeve, as shown in
Figure 5, and twist-lock the pipes or
fittings together.
Step 3. With the adaptor and pipe attached to the fireplace, slide the fireplace into it's correct location, and mark the wall for a square hole of the appropriate size. Use a 10"x10" square hole for 7" x 4" pipe and use an 11"x11" square hole for 8" x 5" pipe. The center of the square hole should line up with
the centerline of the horizontal pipe, as shown in Figure 6. Cut and frame the square hole in the exterior wall where the vent will be terminated. If the wall being penetrated is constructed of noncombustible material, i.e. masonry block or concrete, a hole with zero clearance to the pipe is acceptable.
Notes:
(1) The horizontal run of vent must be level, or have a 1/4-inch rise for every 1 foot of run towards the termination. Never allow the vent to run downward. This could cause high temperatures and may present the possibility of a fire.
(2) The location of the horizontal vent termination on an exterior wall must meet all local and national building codes, and must not be easily blocked or obstructed. Termination clearances are as follows:
(a) Clearance above the ground, veranda, porch, deck or balcony -12
inches minimum.
(b) Clearance to a window or door that may be opened -9 inches
minimum.
(c) Vertical clearance to a ventilated soffit located above the termination with a horizontal distance of 2 feet from the centerline of the termination -18 inches minimum. (d) Clearance to an unventilated soffit - 12 inches minimum.
CENTER OF HOLE
Fig 6
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(e) Clearance to an
outside corner -as tested.
(f) Clearance to an inside
corner -as tested.
(g) Not to be installed above a meter/regulator assembly within 3 feet horizontally from the centerline of the regulator.
(h) Clearance to a service regulator vent outlet -6 feet
minimum.
(i) Clearance to non­mechanical air supply inlet to a building or the combustion air inlet to any other appliance -12 inches
minimum.
(j) Clearance to a mechanical air supply inlet -
6 feet minimum.
(k) Clearance above a
paved sidewalk or paved driveway located on public property -refer to local code.
(l) Clearance under a
veranda, porch, deck or balcony -12 inches
minimum.
For installations requiring a
vertical rise on the exterior of the building, 14-inch and 36-inch tall Snorkel Terminations, as shown in Figure 7 are available. Follow the same installation procedures as used for standard Square Horizontal Terminations. If the Snorkel Termination must be installed below grade, (i. e. basement application), proper drainage must be provided to prevent water from entering the Snorkel Termination. Refer to Figure 8. Do not attempt to enclose the Snorkel within the wall, or any other type of enclosure.
12 INCHES MINIMUM
SNORKEL
SNORKLE
12 INCHES MINIMUM
ADEQUATE DRAINAGE
Fig 8
Fig 7
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Step 4. For a Square Horizontal Vent
Termination, place the vent cap in the center of the square hole and attach to the exterior wall with the four wood screws provided. Before attaching the Vent Termination to the exterior wall, run a bead of non-hardening sealant around it's outside edges, so as to make a seal between it and the wall. If you are using a Round Horizontal Vent Termination, place an exterior Wall Firestop over the square hole. Run a bead of non-hardening sealant around the edges of the Wall Firestop, and attach the Wall Firestop to the wall with the four wood screws provided. The arrow on the vent cap should be pointing up. Insure that proper clearances to combustible
materials are maintained. (Fig 9)
Notes:
(1) The four wood screws provided should be replaced with appropriate fasteners for stucco, brick, concrete, or other types of sidings.
(2) For buildings with vinyl siding, a Vinyl Siding Standoff, should be installed between the vent cap and the wall. (Fig 10) Attach the Vi­nyl Siding Standoff to the Horizontal Vent Termi­nation. The Vinyl Siding Standoff prevents exces­sive heat from possibly melting the vinyl siding material. Note that the Square Horizontal Vent Termination bolts onto the flat portion of the Vi­nyl Siding Standoff,
Fig 9
WOOD SCREWS
WOOD SCREWS
Fig 10
BOLT
(4) REQ
CUT VINYL SIDING AWAY TO FIT STANDOFF
NUT
(4) REQ
VINYL SIDING STANDOFF
ROUND TERMINA­TION CAP
WOOD SCREW (4) REQ
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(shaded area shown in Figure 10), so that an air space will exist between the wall and the Vent Termination. The Round Horizontal Vent Termination does not need an exterior Wall Firestop when using a Vinyl Siding Stand­off. Simply slide the round termination through the Vinyl Siding Standoff in order to connect to the vent piping. Be sure that all of the vent cap mesh is to the exterior of the wall.
Step 5. Before connecting the horizontal
run of vent pipe to the vent termination, slide the Wall Firestop over the vent pipe on the interior side of the wall.
Step 6. Slide the appliance and vent assembly towards the wall, carefully inserting the vent pipe into the vent cap assembly. It is important that the vent pipe extend into the vent cap sufficient distance so as to result in a minimum pipe overlap of 1-1/4 inches. Secure the connection between the vent pipe and the vent cap. For square caps, attach the two sheet metal strips extending from the vent cap assembly into the outer wall of the vent pipe. Use the two sheet metal screws provided to connect the sheet metal strips to the pipe section. For round caps, use three sheet metal screws and attach cap to pipe section. (Fig 11)
Step 7. Slide the Wall Firestop up to the wall surface and attach with screws provided. (Fig 12)
Fig 11
STRAP
WOOD SCREWS
Fig 12
SQUARE TERMINATION
ROUND TERMINATION
WALL FIRESTOP
SHEET METAL SCREW
WALL
FIRESTOP
WALL FIRESTOP
SHEET METAL SCREW
FOLD
STRAP
HERE
1-1/4 "
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VERTICAL
TERMINATION
Step 1. Check the appliance
manufacturers's installation instruc­tions for required clearances (air spaces) to combustibles when passing through ceilings, walls, roofs, enclosures, attic rafters, or other nearby combustible surfaces. Do not pack air spaces with insu­lation. Check the appliance manufacturer's instructions for maximum vertical rise of the vent­ing system, and any maximum hori­zontal offset limitations. (Fig 13)
Step 2. Set the fireplace in it's
desired location. Drop a plum bob down from the ceiling to the position of the appliance flue exit, and mark
the location where the vent will penetrate the ceiling. Drill a small hole at this point. Next, drop a plumb bob from the roof to the hole previously drilled in the ceiling, and mark the spot where the vent will penetrate the roof. Determine if ceiling joists, roof rafters, or other framing will obstruct the venting system. You may wish to relocate the appliance, or to offset, to avoid cutting load­bearing members.
Step 3. To install the
Ceiling Firestop in a flat ceiling,
CEILING JOISTS
Fig 13
CEILING FIRESTOP
Fig 14
FRAMING
OPTIONAL HIGH-WIND TERMINATION CAP
CLEARANCES AS DEFINED BY APPLIANCE MFG
1-1/2 INCH LONG WOOD SCREWS
CLEARANCES AS DEFINED BY APPLIANCE MFG
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cut a square hole in the ceiling, (10"x10" square for 7" x 4" pipe, 11"x11" square for 8" x 5" pipe) centered on the hole drilled in Step 2. Frame the hole as shown in Fig 14.
Step 4. If the Twist-lock adaptor
has not been installed on the fireplace by the manufacturer, install it now in accordance with the fireplace instruction manual.
Step 5. Assemble the desired
lengths of Galvanized Pipe and Elbows necessary to reach from the Appliance Adaptor up through the Ceiling Firestop. Insure that all Pipe and Elbow connections are in their fully twist-locked position.
Step 6. Cut a hole in the
roof centered on the small drill hole placed in the roof in Step 2. The hole should be of sufficient size to meet the minimum requirements for clearance to combustibles, as specified by the appliance manufacturer. Continue to assemble lengths of Pipe and Elbows necessary to reach from the Ceiling Firestop up through the roof line.
DIMENSION "H" OBTAINED FROM TABLE 1
H
Fig 16
TABLE 1
ROOF PITCH MINIMUM HEIGHT
FEET METERS
FLAT TO 7/12 1 0.3 OVER 7/12 TO 8/ 1 2 1.5 0.46 OVER 8/12 TO 9/ 1 2 2 0.61 OVER 9/12 TO 10/12 2.5 0.76 OVER 10/12 TO 11/12 3.25 0.99 OVER 11/12 TO 12/12 4 1.22 OVER 12/12 TO 14/12 5 1.52 OVER 14/12 TO 16/12 6 1.83 OVER 16/12 TO 18/12 7 2.13 OVER 18/12 TO 20/12 7.5 2.29 OVER 20/12 TO 21/12 8 2.44
Fig 15
CLEARANCES AS DEFINED BY APPLIANCE MFG
45° ELBOW
WALL STRAP
PLUMBER'S TAPE CONNECTED TO WALL STRAP
CLEARANCES AS DEFINED BY APPLIANCE MFG
45° ELBOW
OPTIONAL HIGH-WIND TERMINATION CAP
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Fig 17
VERTICAL TERMINATION
FLASHING
SECURE FLASHING WITH
NON-HARDENING
SEALANT AND ROOFING
NAILS
OPTIONAL HIGH-WIND TERMINATION CAP
STORM COLLAR
Notes:
(1) If an offset is necessary in the attic to avoid obstructions, it is important to support the vent pipe every 3 feet, to avoid excessive stress on the Elbows, and possible separation. Wall Straps are available for this purpose. (Fig 15)
(2) Whenever possible, use 45° Elbows, instead of 90° Elbows. The 45° Elbow offers less restriction to the flow of flue gases and intake air.
Step 7. Slip the flashing over the Pipe Section(s) protruding through the roof. Use a non-hardening sealant between the Flashing and the roof to prevent water leakage. Secure the base of the Flashing to the roof with roofing nails. Insure the roofing material overlaps the top edge of the Flashing as shown in Fig 17. Verify that you have at least the minimum clearance to combustibles at the roofline.
Step 8. Continue to add Pipe Sections until the height of the Vent Cap meets the minimum building code requirements described in Fig 16. Note that for steep roof pitches, the vent height must be increased. In high wind conditions, nearby trees, adjoining rooflines, steep pitched roofs, and other similar factors can result in poor draft, or down-drafting. In these cases, increasing the vent height may
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Fig 18
NAILS
CEILING FIRESTOP
CLEARANCES AS DEFINED BY APPLIANCE MFG
CLEARANCES AS DEFINED BY APPLIANCE MFG
CLEARANCES AS DEFINED BY APPLIANCE MFG
CLEARANCES AS DEFINED BY APPLIANCE MFG
solve this problem.
Step 9. Slip the Storm
Collar over the Pipe, and push it down to the top of the Flashing, as shown in Fig 17. Use the non-hardening sealant above and below the joint between the Storm Collar and the Pipe.
Step 10. Twist lock the
Vent Cap.
Notes:
(1) For multi-story vertical installations, a Ceiling Firestop is required at any subsequent floors. (Fig 18) The opening should be cut and framed in the same manner as the opening in Step 3. (See Fig
14)
(2) Any occupied areas above the first floor, including closets and storage spaces, which the vertical vent passes through, must be enclosed.
The enclosure may be framed and sheetrocked with standard construction materials, however consult the appliance manufacturer's installation instructions for the minimum allowable clearance between the outside of the vent pipe, and the combustible surfaces of the enclosure. Do not fill any of the required air spaces with insulation.
GENERAL
MAINTENANCE
Conduct an inspection of the venting system semi-annually.
Recommended areas to inspect are as follows:
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1. Check areas of the Venting System which are exposed to the elements for corrosion. These will appear as rust spots or streaks, and in extreme cases, holes. These components should immediately be replaced.
2. Remove the Cap, and shine a flashlight down the vent. Remove any bird nests, or other foreign material.
3. Check for evidences of excessive condensate, such as water droplets forming in the inner liner, and subsequently dripping out at joints. Continuous condensate can cause corrosion of caps, pipe, and fittings. It may be caused by having excessive lateral runs, too many elbows, and exterior portions of the system being exposed to cold weather.
4. Inspect joints, to verify that no Pipe Sections or Fittings have been disturbed, and consequently loosened. Also check mechanical supports such as Wall Straps, or plumbers' tape for rigidity.
LABELS
All components are labelled with the appropriate identification information, and the listing data.
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Other products made by Simpson Dura-Vent:
Dura/Plus Chimney
Dura-Vent Gas Vent (B-Vent)
Dura-Black Single W all Stovepipe
Dura/Liner Masonry Reliner
DVL Close Clearance Connector Pipe
Dura/Connect Single-Wall Connector for B-Vent
DuraFlex Masonry Reliner for Gas Appliances
Designer Series Accessories
SIMPSON DURA-VENT, INC
PO Box 1510 Vacaville, CA 95688-1510
Vicksburg, MS
(800)-835-4429 (707)-446-4740 (FAX)
May1996 L951
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