Whirlpool SC8720EDB Installation Instructions - Page 4

Gas supply requirements WARNING Explosion Hazard Use a new AGA or CSA approved gas supply line. Install a shut-off valve. Securely tighten all gas connections. If connected to LP, have a qualified person make sure gas pressure does not exceed 14" water column. Examples of a qualified person include licensed heating personnel, authorized gas company personnel, and authorized service personnel. Failure to do so can result in death, explosion, or fire. Observe all governing codes and ordinances. Important: Cooktop must be connected to a regulated gas supply. This installation must conform with all local codes and ordinances. In the absence of local codes, installation must conform with American National Standard, National Fuel Gas Code ANSI Z223.1 - latest edition* and all local codes and ordinances. Copies of the standards listed above may be obtained from: * CSA International 8501 East Pleasant Valley Road Cleveland, Ohio 44131-5575 Input ratings shown on the model/serial rating plate are for elevations up to 2,000 feet (610 m). For elevations above 2,000 feet (610 m), ratings are reduced at a rate of 4% for each 1,000 feet (305 m) above sea level. Type of gas: This downdraft cooktop is factory set for use with Natural gas. It is design- certified by CSA International for Natural or L.P. gas usage with appropriate conversion. (See "Gas conversion" instructions, Page 7). The model/serial rating plate (located on the right side of the downdraft plenum) lists the type of gas that can be used. If the type of gas listed does not agree with the type of gas available, check with the local gas supplier. Conversion must be done by a qualified service technician. Gas supply line: With Natural gas, provide a gas supply line of 3/4" rigid pipe to the downdraft cooktop location. With L.P. gas, piping or tubing can be 1/2" minimum. A smaller size pipe on long runs may result in insufficient gas supply. Usually, L.P. gas suppliers determine the size and materials used on the system. Pipe-joint compounds made for use with L.P. gas must be used. Flexible metal appliance connector: If local codes permit, a new AGA or CSA designcertified, 4-5 foot long, 1/2" or 3/4" I.D., flexible metal appliance connector is recommended for connecting the cooktop to the gas supply line. A 1/2" male pipe thread is needed for connection to pressure regulator female pipe threads. Do Not kink or damage the flexible metal tubing when moving the downdraft cooktop. If rigid pipe is used as a gas supply line, a combination of pipe fittings must be used to obtain an in-line connection to the downdraft cooktop. All strains must be removed from the supply and fuel lines so cooktop will be level and in line. Venting requirements Venting system must terminate to the outside. Do Not terminate the vent system in an attic or other enclosed space. Do Not use 4-inch (10 cm) laundry-type wall caps. Use metal vent only. Exception: See "optional venting under a concete slab", in "Venting methods" on Page 4. Rigid metal vent is recommended. Do not use plastic or metal foil vent. To reduce risk of fire and to properly exhaust air, be sure to vent air outside. Do Not vent exhaust air into spaces within walls or ceilings or into attics, crawl spaces or garages. Vent materials needed for installation are not supplied. Before making cutouts, make sure there is proper clearance within the wall or floor for the exhaust vent. Do Not cut a joist or stud unless absolutely necessary. If a joist or stud must be cut, then a supporting frame must be constructed. Determine which venting method to use. See "Venting methods," Page 4. Next, determine the equivalent vent length using the chart on page 4. This cooktop is equipped with a dual range blower. The equivalent vent length (not actual) determines whether blower is set at the "Low" or "High" range. The blower is set at the "Low" range setting at the factory. The blower housing must be rotated or swiveled to the proper angle needed for your installation. The blower can be swiveled 90°. The blower may be rotated horizontally or vertically. Reach through the ventilation chamber to loosen, but Do Not remove, the nuts around the blower inlet to adjust blower. This downdraft cooktop is rated at 60 feet of straight vent. • If vent length is 10 feet or less, 5" diameter round vent MUST be used. • If vent length is more than 10 feet, use 6" diameter round or 3-1/4" x 10" rectangular vent. Thermal breaks: In areas of extreme cold weather, it may be necessary to provide a short length of nonmetallic vent as close to the wall as possible to prevent thermal conduction along the metal vent. For altitudes above 4,500 ft, reduce recommended vent run by 20%. shutoff valve "open" position to downdraft cooktop to gas supply Shutoff valve: The supply line must be equipped with an approved manual shutoff valve. This valve should be located in the same room as the downdraft cooktop and should be in a location that allows ease of opening and closing. The valve is for turning on or shutting off gas to the appliance. Do Not block access to shutoff valve. Pressure regulator: The gas pressure regulator supplied with this downdraft cooktop must be used. The regulator must be checked at a minimum 1-inch water column above the set pressure. The inlet pressure to the regulator should be as follows for operation and for checking the regulator setting: NATURAL GAS: Minimum pressure: 6 inches WC Maximum pressure: 14 inches WC L.P. GAS: Minimum pressure: 11 inches WC Maximum pressure: 14 inches WC Line pressure testing above 1/2 psi gauge (14" WC) - The downdraft cooktop and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures greater than 1/2 psi (3.5 kPa). Line pressure testing at 1/2 psi gauge (14" WC) or lower - The downdraft cooktop must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of that system at test pressures equal to or less than 1/2 psi (3.5 kPa). For the most efficient and quietest operation: ࠜ Use 26-gauge minimum galvanized or 25-gauge minimum aluminum metal vent. Poor-quality pipe fittings can reduce air flow. (Note: Local codes may require a heavier-gauge material.) Flexible metal vent is not recommended. ࠜ Do Not exhaust more than one downdraft cooktop into a single vent system. ࠜ The length of vent and number of elbows should be kept to a minimum to provide efficient performance. ࠜ The size of the vent should be uniform. ࠜ Use no more than three 90° elbows. ࠜ Do Not install two elbows together. ࠜ Make sure there is a minimum of 18" of straight vent between the elbows if more than one elbow is used. (Elbows too close together cause excess turbulence that reduces airflow.) ࠜ Do Not use a 5" elbow in a 6" or 3-1/4" x 10" system. Instead, use a 5" to 6" transition followed by a 6" elbow, or a 5" to 3-1/4" x 10" elbow transition. ࠜ Do Not reduce back to 5" system after using 6" or 3-1/4" x 10" fittings. ࠜ Avoid forming handmade crimps. Handmade crimps may restrict airflow. ࠜ Use the recommended vent caps for proper performance. If an alternate wall or roof cap is used, be certain cap size is not reduced and that it has a backdraft damper. ࠜ Use duct tape to seal all joints in the vent system. ࠜ Use caulking to seal exterior wall or roof opening around the cap. Page 3