INSTALLATION INSTRUCTIONS Boiler and Engine Exhaust Chimney Systems Grease Duct Systems (DIS only) Double Wall Construction Positive Pressure Chimney Systems MODELS DIS / DAS DIS: INSULATED DAS: UNINSULATED This installation manual will enable you to obtain a safe, efficient and dependable installation of this positive pressure chimney system. Please read and understand these instructions before beginning your installation.
INTRODUCTION TABLE OF CONTENTS 2 Introduction............................................................................. page Testing / listing information..................................................... page Section A - General information ................................. page Features.............................................................................. page Application.......................................................................... page Surrounding / enclosure................
APPLICATION UL 103 Building Heating Appliance Chimney Listing: Duravent models DIS and DIS chimney may penetrate a combustible floor, wall or roof using the appropriate parts and openings sizes. See section D “Roof & Wall Penetration” for more details. Under this category, models DIS and DAS have been determined suitable for venting flue gases at temperatures not exceeding 538°C (1000°F) under continuous operating conditions from gas, liquid, oil or solid fuel fired appliances.
PART NUMBERS OPENING THROUGH COMBUSTIBLE CONSTRUCTION These instructions identify major model DIS / DAS parts by name and part number. The following table serves to identify the minimum opening required when installing a chimney through a floor, wall or roof made of combustible material. See table 3 and figure 1. Example: DIS 36” length with inside diameter 14” made of ss316 inner flue and ss304 outer casing. DIS 14 L36 BC Model Dia. Dia. Part Material Dia.
CHIMNEY AND FITTING JOINT ASSEMBLY All components have a male and female end. The installation orientation is indicated on the labeling of each chimney section with an arrow. The arrow indicates the direction of the flow. Clean all inner and outer surfaces of the male and female ends with an appropriate organic solvent, such as acetone, Mek, or other commercial degreaser. 1.
SUPPORT METHODS AND HEIGHT LIMITS SUPPORT AND GUIDE SPACING FOR MODEL DIS AND DAS 1. Several support and guiding methods are used to anchor a chimney against upward, downward and angular displacement. 2. These supports and guides used with thermal expansion devices, prevent bending stresses on the chimney elbows and joints. 3. Supports and guiding methods and installation are described in Section C. Certain limitations apply for proper installation of supports and guides. See tables 6 and 7.
CHIMNEY WEIGHT Chimney weight is given in pounds per foot of chimney for each diameter. It is important to know the weight of the chimney section for chimney support or guiding. Chimney weight (table 8) along with maximum chimney height (table 6) are necessary to calculate the proper anchor strength needed with wall supports (WS), Anchor Plate (AP) supports and Suspension Bands (SB). * If Dimension “H” exceeds the value in table 7, use bracing or cable guying to stabilize chimney section above the roof.
TERMINATION HEIGHT MULTI-ENGINE EXHAUST SYSTEMS Chimneys and vents shall terminate above the roof level in accordance with the following requirements: A common exhaust system for multiple engine or turbine installations is generally not recommended. A separate exhaust system should be provided for each engine or turbine. 1. Five feet above the roof level or any adjacent flat roof, wall parapet or air intakes, and/or in accordance with the following NFPA 211 requirements. 2.
SECTION B - TEES, ELBOWS, INCREASERS 45° TEE (T45) 90° TEE (T90) 1. Generally used to connect the horizontal length from the appliance to the vertical length when clean-outs access or drain is required. 2. 90° should not be used for changing flow direction in diesel or turbine exhaust. 3. For supporting the tee, the preferred location is above the tee (see figure 9). 4. If it is not possible to suspend the tee, it may be supported from the base (see figure 10).
TEE CAP (TC) ELBOWS 1. Use to block one of the openings of horizontal or vertical tee. 2. Removable, it facilitates access for inspection and maintenance of the chimney. 3. The installation is the same as for lengths. 4. When removed, the old silicone must be cleaned out and a new bed of sealant must be applied. 1. Elbows are used for changes in direction in horizontal or vertical portions of a chimney system. 2.
OFFSETS Offset * 1. Sloped or horizontal offsets in the vertical portion of a chimney above the breeching should be avoided except where absolutely necessary. 2. Sloped offsets require more expansion joints and secure bracing above and below elbows. 3. With solid fuel burning appliance, the slope must not be greater than 30° from the vertical. Appliances which are capable of burning solid fuel or are convertible to solid fuel are limited to the same 30° slope. 4.
SECTION C - STRUCTURAL SUPPORT AND GUIDING LENGTH ANCHOR PLATE (APL) ANCHOR PLATE ASSEMBLY (AP) 1. Use for same application as the anchor plate (AP). 2. It is composed of a straight section - with an effective length of 3 3/4” integrated into a support plate (see Figure 20 for the detail of the part). 3. Unlike the anchor plate (AP), the Length Anchor Plate (APL) doesn’t need any clamp flange (and its hardware) for its installation, so it is easier and faster to isntall. 4.
Sealant bead Height Limits - See Section A, Table 6 for maximum support height of Anchor Plate (AP). NOTE: If bracing is used, minimum “X” angle is 30°. If there is no bracing, the framework must be attached to structural members to provide equivalent rigidity.
WALL SUPPORT (WS) 1. The wall support consists of an Anchor Plate and a prefabricated frame with mounting brackets and angled struts for bracing. 2. Used to support the chimney in vertical runs, it maintains the chimney at an adjustable distance between 2-1/2” and 7-1/2” from the wall (see Figure 26). 3. The maximum weight allowable on the wall support depends if the support is attached to a metal structure or a wood structure (see table 6 for maximum chimney height). 4.
SUSPENSION BAND (SB) 1. Suspension band is used to support and guide the chimney in horizontal runs. It consists of a band, a flexible strap (by others), a trolley and a rail. 2. The trolley and rail allow up to 4” of travel to compensate thermal expansion. 3. See section A, Table 7 for maximum distance between two supports or guide. 4. Important: The flexible strap must be at least 3/4” wide and 0.036” thick made of galvanized or stainless steel.
ROOF BRACE (RB) GUY WIRE (GW) 1. The roof brace is used to stabilize the chimney where it extends more than 15’ above the roof. 2. It consists of one band (RB) and two braces (supplied by the installer). 3. To minimize loads induced by thermal expansion on braces and support, the maximum distance between the last fixed support and the band of the roof brace must be reduced to 5’. 4. Begin by attaching the braces to the band with supplied bolts and nuts.
SECTION D - ROOF AND WALL PENETRATIONS WALL PENETRATION ROOF/FLOOR PENETRATION 1. This part is used to allow model DIS / DAS chimney to pass trough a wall made of combustible construction. NOTE: Crossing a combustible wall is not permitted for diameters larger than 10” inside diameter. 2. The wall penetrator (FSW) consist of a firestop female half and a male half that slide in each other to adjust wall thickness from 7.8” to 12.1”, see Figure 37. 3. Installation step: a.
SECTION E - TERMINATIONS, STARTING ADAPTORS, DRAIN LENGTH AND RELIEF VALVE STARTING ADAPTORS Single Wall Adaptor (SWA) 1. The Single Wall Adaptor is used as an appliance connector. It is designed to be clamped with a Retaining Band and a locking band over a shank type flue gas outlet. 2. First, slide the retaining band over the appliance outlet and tighten it with supplied bolt. (See figure 38). 3.
TERMINATIONS Flange adaptor Note: Installation of model DIS / DAS chimney can be completed without any terminations if not necessary. Bolts and nuts (by other) Rain Cap (RC) Gasket (by other) 1. Installed at the top of the chimney, it provides the greatest degree of rain protection. 2. Three models of rain cap are available dependently of the diameter, see Figure 45. 3. Do not use with turbine or engine exhaust. 4.
RELIEF VALVE (DIS ONLY) Better draft Relief Valve (RV) 1. The relief valve is intended for use with diesel engines to provide extra protection to the chimney in case of a delayed ignition of backfire. 2. The connection of the Relief valve and the DIS chimney is done with the use of the ANSI Female Flange Adaptor (FFA). 3. The valve is factory calibrated to open at 27 in. wc. 4. The relief valve must be supported independently of the rest of the exhaust system.
SECTION F - THERMAL EXPANSION BELLOWS EXPANSION JOINT (LB) Thermal Expansion : 1. Used in diesel or turbine exhaust installation for expansion and vibration movements. 2. Good for exhaust pressure up to 60 inches of water column, it will compensate for up to 3” max of expansion. See table 14 for maximum run with one bellow. 3. Bellow joints comes with a liner to protect the bellow and to have a smooth flow. 4.
Flip top (FT) Anchor plate ventilated (APV) 12” Long length minimum with bellows (L12) Bellow joint (LB) 3” Max. Expansion Wall guide (WG) UP TO 60 INCH W.C. INTERNAL PRESSURE Wall support (WS) 12” Long length minimum with bellows (L12) Bellow joint (LB) 3” Max. Expansion 12” Long length minimum with bellows (L12) Wall guide (WG) Wall support (WS) Suspension band (SB) Bellow joint (LB) Fixed support (AP) Suspension band (SB) Bellow joint (LB) Fixed support (AP) MUFFLER Fixed Support (AP) 3” Max.
ADJUSTABLE LENGTH 1. The adjustable length (LA) is used for two functions, one is to make odd lengths and the other to serve as an expansion joint. 2. The adjustable length may be used when internal pressure do not exceed 6” water column or in well ventilated areas. See Figure 66 for good positioning of the adjustable length. 3.
VARIABLE LENGTH 1. The variable length (LV) is used only to make odd lengths, it doesn’t compensate thermal expansion. See figure 65 for typical location. 2. The variable length assembly includes a sliding flanged female coupling, a flanged retaining band, a locking band, a insulation band and split outer casing. Inner flue sealant S-2000 or S-650 is necessary depending on the flue gas temperature. 3. Installation steps : a. Measure the distance required for the variable length. See figure 59. b.
Finishing cone (FC) Adjustable length (LA) UP TO 6 INCH W.C.
SECTION G - GREASE DUCT APPLICATION (DIS ONLY) ACCESS Grease Duct installations require provisions for cleaning the interior of the duct. NFPA 96 clean-out requirements are as follows: 1. A clean-out must be provided at each change of direction except where the entire length of the duct can be inspected and cleaned from either the hood or the discharge end. 2. On horizontal duct runs, at least one (1) 20” (508) diameter opening must be provided.
GREASE TEE 90° (GT90P) / TEE 90 DAM (T90D) (DIS ONLY) GREASE TEE Y (DIS ONLY) The Grease Tee 90 and the standard Tee 90 with a dam are used to provide access for clean-out to comply with NFPA 96 requirements. They are equipped with a 1-1⁄2” (38) high grease dam at the access port. The access port must be closed with a tee cap (TC). The location of the access port in the tee is dependent on the orientation of the tee in the final installation. Access port location is coded as shown in Figure 71. 1.
No Tool Access Door - Removal for Inspection or Cleaning 1. Unscrew the six (6) wing screws with your hands and set them in a safe place during the inspection (see figure 73). 6. Inspect the ceramic gasket (white) and the silicone gasket (gray) attached on the inside of the Inner door for any damage (see figure 76). If any damages, you must order one or both gaskets. Figure 73 2. Remove the outer door from the outer wall of the duct and set it in a safe place during the inspection (see figure 74).
FAN ADAPTOR PLATE (FAN) (DIS ONLY) MAINTENANCE 1. The fan adaptor is designed to connect to an upblast fan mounted on a roof curb. 2. When connected to an upblast fan (See Figure 77), the plate mounts on top of the fan curb which supports the fan housing. 3. The plate may be positioned off center within the curb provided that minimum clearance to combustibles is maintained. 4. In the event that the plate is positioned off center, trim off excess plate material to allow fan placement. 5.
SECTION H - MARKINGS SAFETY LISTING LABELS - DIS AND DAS 30 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
NOTES 31
Warranty Normally, all parts should be ordered through your Duravent distributor or dealer. Parts will be shipped at prevailing prices at time of order. These products have a limited warranty. Please read the warranty to be familiar with its coverage. Retain this manual. File it with your other documents for future reference. Product reference information Please contact Duravent for the phone number of your nearest Duravent dealer who will answer your questions or address your concerns.
