Read All Instructions Before Using the Appliance. READ AND SAVE THESE INSTRUCTIONS SAFETY INSTRUCTIONS WARNING TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS, OBSERVE THE FOLLOWING: A. Installation work and electrical wiring must be done by qualified person(s) in accordance with all applicable codes and standards, including fire-related construction. B. Sufficient air is needed for proper combustion and exhausting of gases through the flue (chimney) of fuel burning equipment to prevent backdrafting. Follow the heating equipment manufacturer's guideline and safety standards such as those published by the National Fire Protection Association (NFPA), and the American Society for Heating, Refrigeration and Air Conditioning Engineers (ASHRAE), and the local code authorities. C When cutting or drilling into wall or ceiling, do not damage electrical wiring and other hidden utilities. WARNING CAUTION: For general ventilating use only. Do not use to exhaust hazardous or explosive materials and vapors. To reduce risk of fire and to properly exhaust air, be sure to duct air outside. Do not vent exhaust air into spaces within walls, ceilings, attics, crawl spaces or garages. TO REDUCE THE RISK OF FIRE, USE ONLY METAL DUCT WORK. To reduce the risk of fire, electric shock and injury to persons, ventilator assemblies, All DHD models must be installed with integral blower, model DHG601DUC or remote blower models DHG6003UC or DHG1003UC. Other ventilator blowers cannot be substituted. To reduce the risk of fire or electric shock, do not use the fan with any solid-state speed control device. This appliance has been found to be in compliance with UL507 Standard for Electric Fans and CAN/CSA-22.2 No. 113 Canadian Standard doe Fans and Ventilators. It is the responsibility of the owner and the installer to determine if additional requirement or standards apply in specific installations. D. Ducted fans must always be vented to the outdoors. E. Always unplug or disconnect the downdraft from the power supply before servicing. F. This unit is designed for indoor use only. Use this unit only in the manner intended by the manufacturer. This unit is manufactured for indoor use only. Do not use this unit outdoors. Parts Needed · · · · · · · Blower (Remote or Integral) Tape Measure Phillips Head Screwdriver Duct Tape Ductwork (configuration varies depending on location; See pages 4-7 for further information) Additional Sheetmetal screws (as necessary for ductwork installation) Transition(s) (style varies depending on ductwork) Transition box for remote blower installations is available as an accessory. · · Saw (or equivalent for cutting countertop) #8 x 1 1/4" Wood Screws (4) Page 1 Parts Supplied · · · · · Downdraft assembly (1) #8 Sheetmetal Screws (8) Blower Cord Traction Relief (1) Hardware for brackets on vent (2) Remote Blower Pigtail Top Cap Internal Blower (Not Included) Strain Relief Figure 1 INTRODUCTION GENERAL DESCRIPTION The complete downdraft system consists of the ventilator, the intake and the blower (See Fig. 1). The blower can be either integral (mounted on the vent intake in the cabinet under the cooktop) or a remote (mounted on the roof or outside wall. When a remote blower is used, a duct transition is mounted on the ventilator intake in place of the integral blower to connect the intake to the ductwork. The duct transition must be purchased separately. The integral blower or duct transition can be mounted in different positions on the intake to route ductwork to avoid cabinet, building framing, utilities, etc. The downdraft system is available in 30-inch and 36-inch models, It is intended for use with all brands and models of residential 30-inch or 36-inch gas or electric cooktops except professional style cooktops. Step 1: PLAN THE INSTALLATION Carefully follow the planning procedures listed below (See Figure 2). A. Determine whether a remote or integral blower will be used. Remote blower installation requires 4 wires plus a ground wire to run from the downdraft to the blower. B. Make sure that adequate cabinet and counter space has been provided and that the intake will be accessible if service is required. C. Consider that cross drafts created by adjacent open windows, doors, air conditioning, old heating vents, recessed ceiling lights, and traffic patterns may affect performance. D. For gas cooktop installations make sure that a minimum 10 square inch opening is provided in the toe-kick or other cabinet area. Inadequate ventilation of the cabinet below the cooktop may result in flame outage when operating the vent system. E. Provide for air supply or "make-up air" to the room where unit will be installed. If "make-up air" is not provided, then problems, such as fireplace chimney downdrafts, could result. Page 2 Be certain to avoid interference with gas and electric supply to cooktop. Cooktop Shelving and drawer depths are dependent upon cooktop depth and setback. 8" Cutout Depth 2 1/4" SB (see Fig. 7,8) Cooktop 5 1/2" 6 1/2" Drawer Shelving must 22" be removable Dimensions are dependent on discharge direction. 14" Integral/Remote A B Figure 2 9-13/16" 13" F. Investigate potential ductwork routes and choose the shortest possible route from the unit to an outside wall or to the roof via an inside wall and attic. For guidance, typical ducting installations are shown in figures 3 through 6. Installation in island locations will require under floor ducting. Peninsula locations usually require ducting laterally through cabinets or under cabinet toespaces. Consider potential interferences to ductwork from building framing (floor joists, wall studs, etc.) and utilities (electrical wiring, water, gas, or sewer lines, etc.). G. Determine whether the chosen route of ducting will meet vent system performance requirements. To do this, measure the duct lengths needed and determine specific fittings required. Enter this data in the spaces provided in Table 1 (See Page 5). For duct runs greater than 100 feet please contact customer service for performance estimates. In addition, the duct installation guidelines in Table 2 (See Page 7) should be followed in developing the ductwork plan. H. Purchase the necessary ductwork in accordance with the listing developed in G above. Page 3 Figures 3 through 6 are examples of possible ducting Remote Blower Roof Mount Installation Integral Blower Through Wall Installations Remote Blower Duct Transition Box Integral Blower Wall Cap 1255-1 12" Min. Ground Figure 3 Figure 4 Integral Blower Through Wall Installation Remote Blower Through Wall Installation 3-1/4" x 10" or 8" Duct End Must Be Closed and Sealed Integral Blower Remote Blower Duct Transition Box 10" Collar BLOWER ROTATED 90° FOR SIDE CONNECTION Figure 5 Figure 6 Page 4 TOTAL (of both columns)= Page 5 TABLE 2. · DUCTWORK INSTALLATION GUIDELINES · Where local codes permit, plastic pipe (PVC-schedule 40 pipe or ABS pipe 7" or 8" diameter) can be used in areas of high ground moisture and in slab floors to eliminate future rusting. Use only duct work constructed of materials that are acceptable by the applicable codes. All duct should be 26 gauge or heavier to minimize flex due to air flow. The remote blowers requires a 10" or 8" diameter round duct (depending on model) to match the inlet ring. A transition is necessary from other duct sizes. Use sheet metal screws as required to support the duct weight, and seal all joints with duct tape. Be certain that the duct work does not interfere with floor joists or wall studs. Do not exhaust more than one vent into a single duct run. Thermal breaks, such as a short section of nonmetallic duct, should be used in areas of extreme cold. Always use an appropriate roof or wall-cap with damper. Laundry type wall caps should never be used. For safety reasons, ducting should vent directly outdoors (not into an attic, underneath the house, into the garage or into any enclosed space). Keep duct runs as short and straight as possible. Duct fittings (elbows and transitions) reduce air flow efficiency. Back to back elbows and "S" turns give very poor delivery and are not recommended. A short straight length of duct at the inlet of the remote blower gives the best delivery. Transition to duct from the integral blower or remote duct transition as close to the downdraft as is possible. In order of preference, use 1st. 10" round duct 2nd. 8" round duct 3rd. 3-1/4" x 14" duct 4th. 7" round duct 5th. 3-1/4" x l0" duct 6th. 6" round duct · · · · · · · · · · · · · The use of flexible metal round duct should only be used when no other duct fitting exists. Limit use to short lengths and do not crush when making corners. Step 2: Prepare Countertop Cutout For installation with a Bosch cooktop, refer to Part A and Figure 7 (Page 7)). For installation with another brand of cooktop, refer to Part B (Page 8). For all installations verify that all cutouts will clear the inside of the front countertop support rail, and that the cooktop and vent will be centered left to right within the cutout. Also, make certain that the front and rear cutouts are straight and parallel to the front edge of countertop and the rear backsplash and/or wall. Assure that the side cutouts are square to the front and rear cutouts. All illustrations and dimensions are based on standard 24" deep by 36" high American style base cabinets with 25" countertops. When installing laminated or solid surface countertops such as SurellTM and Corian®, be sure to follow the countertop manufacturer's instructions regarding minimum corner radii, reinforcement of corners, etc. For overhead cabinet and cooktop side clearances consult cooktop Installation Instructions. A. For installation with a Bosch cooktop (Figure 7 and Table 2) Provide an opening in the countertop as specified in Table 3 (Page 8). Make sure that the distance from the front of the countertop to the front of the cutout is not less than dimension "SB". Verify that the available flat countertop is greater than dimensions "OW" by "OD". Make certain that the backsplash thickness does not exceed dimension "BT". Page 6 TABLE 2: INSTALLATION DIMENSIONS FOR DHD WITH BOSCH COOKTOP (in.) Cooktop Model No. CW Cutout Width CD Cutout Depth OW Overall Width OD Overall Depth SB Minimum Set Back BT, Max++ Backsplash Thickness 30" Cooktops: Installed with DHD8005UC NGT, NGP NEM, NES 28-7/8 28-3/4 22-1/8 22-1/8 30 30 23-3/4 23-7/8 1-1/2 2-1/2 3/4 3/4 36"Cooktops: Installed with DHD9605UC NGT, NGP** NEM, NES 34-7/8 34-3/4 22-1/8 22-1/8 36 36 23-3/4 23-7/8 1-1/2 2-1/2 3/4 3/4 Table 2 Notes * Dimension "SB" is the minimum distance from the leading edge of the counter to the leading edge of the cutout. ++Dimension "BT" is the thickness of backsplash that provides 1/4" clearance between vent and backsplash. Any backsplash with a curved radius where it meets the counter will require additional clearance. Thicker backsplashes may be used by increasing the counter and cabinet depths. All dimensions are in inches and are based upon a standard 24" deep base cabinet with 25" countertop. ** NGT and NGP: width in table is at the widest point (center). INSTALLATION WITH BOSCH COOKTOPS WHEN SPECIFIED /8" 43 " : 3 8 3/8 " 36 " : 2 30 2 1/4" Figure 7 Page 7 INSTALLATION WITH OTHER COOKTOPS WHERE SPECIFIED /8" 43 " : 3 8 3/8 " 36 " : 2 30 2 1/4" Figure 8 B. FOR INSTALLATION WITH ANOTHER BRAND OF COOKTOP (Figure 8) Have the following cooktop measurements available before proceeding All cooktop dimensions should be verified through measurement prior to cutting the countertop: CCW = Cooktop Cutout Width CCD = Cooktop Cutout Depth COW = Cooktop Overall Width COD = Cooktop Overall Depth with the above dimensions confirmed, determine the cutout size as follows: 1. Find the cutout width, (CW): If CCW is smaller than the DHD cutout width then: Installation DHD8005UC DHD9605UC CW 283/8 343/8 2. Calculate the cutout depth, CD: Determine the cooktop overhang (CO) CO = (COD-CCD)/2 (Assumes front and rear cooktop overhangs are equal) Calculate the cutout depth, (CD): CD = COD - CO+1-7/8" 3. Determine setback (SB) distance from front of countertop to front of cutout. SB is specified in the installation instructions shipped with the cooktop. 4. Backsplash thickness must not exceed BT as calculated below: BT = 24 7/8" - OD-SB+CO (Provides 1/8" clearance between vent and backsplash.) A negative value for BT means countertop is too small for the installation. 5. Verify that the available flat countertop has a width greater than OW and a depth greater than OD. OW depends on the installation: DHD8005UC: OW equals the greater of COW or 30". DHD96005UC: OW equals the greater of COW or 36". OD is determined by: OD=COD+21/8". 6. Cut countertop using dims: CD, CW and SB as defined in Figure 8. If CCW is larger than the DHD cutout width then: CW = CCW See Figure 8 for DHD cutout widths and d ...