valutazioni - 3, GPA: 4.3
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Install only UL listed type BW 4” oval gas vent. When the vent enters the attic, a listed type B-1 round flue pipe may be used. See Figure 2, Page 7. Vent pipe must connect to the wall furnace header plate with a “B” vent base plate and terminate with a cap at a point at least 12 foot above the bottom of the wall furnace, two feet above any obstacle within a 10 foot radius, and at least 3 foot above the roof. Provisions must be made for adequate combustion and ventilation air. This appliance is equipped with a manual reset blocked flue switch designed to protect against a blocked flue condition, which would cause combustion products to spill back into the living quarters. NOTE: A partially blocked, inadequate, or disconnected vent system may not activate the switch. Discoloration of the grille is an indication of a bad vent. If this occurs, the vent can be checked by a qualified serviceman using a draft gauge. After 15 minutes the gauge should read between -.02 up to -.04 inches w.c. Vent must be checked at the beginning of each heating season. The switch when activated on a bulb control burner will extinguish the pilot flame, on a thermostat controlled burner, the thermostat circuit will be broken, turning off the main burner flame. Before the heater can be relit, the reset button must be activated. See Figure B for location of the manual reset blocked flue switch. To reset the switch, insert a slender rigid object (i.e. screwdriver) through the front panel louvers and push the reset button down. See Figure B-1. However, you may have to remove the front panel, then reset the switch and reinstall the front panel to relight heater. If homeowner experiences this problem, the vent system must be checked and corrected. NOTE: A pre-existing vent that has worked for years may not be adequate for todays design because of higher efficiency requirements that result in lower stack temperatures. See “Possible Causes and Corrective Action” on Page 16. All type “B” vents shall extend in a generally vertical direction with offsets not exceeding 45 degrees, except that a vent system having not more than one 60 degree offset may be allowed. Any angle greater than 45 degrees from the vertical is considered horizontal. The total horizontal run of a vent plus the horizontal vent connector shall be not greater than 75 percent of the vertical height of the vent. Any offsets used should be as far above the drafthood as possible to allow a venting action to begin before any restriction is encountered. Page 6 Man. Reset Blocked Flue Switch Switch/ Gas Control WireDraft Diverter Relief Opening Combustion Chamber Reset Button FIGURE B FIGURE B-1 WARNING: Do not bypass the blocked flue switch. To do so could expose the consumer to property damage, personal injury or possible death. More than 10’ 10’ Height above any roof surface within 10’ horizontally 2’ Min. 3’ Min. Chimney Ridge 10’ or Less 2’ Min. 3’ Min. Chimney Ridge FIGURE A To heater gas control valve Manual cut-off-valve Gas Supply Line Drip Leg 1/8” NPT Pressure Tap GAS SUPPLY ROUGH-IN INSTRUCTIONS NOTE: Maximum wall thickness for a dual wall (W505, W506) installation is 5-3/8”. STEP 1. Attach the base plate (purchased with the vent pipe) to the header plate using two No. 8 sheet-metal screws through the pre-punched holes. The heater may not vent properly without a base plate to anchor and seal the vent system. See Figure C. Installation of B-W Gas Vent for one story buildings or for first floor of multistory buildings Ceiling plate spacers to center B-W gas vent in stud space - nail securely Plate cut away for full width of stud space to provide ventilation Studs on 16 inch centers at both ends Sheet metal screw base plate to header Use manufacturer’s method of fastening pipe to base plate Header plate of vented wall furnace (also acts as firestop) FIGURE C STEP 2. Cut out an opening between the studs of 14-3/8” x 66-1/2” above the floor plate. Embed the rear flange of the channel on top of header into either the drywall or the plastered wall. This provides part of the required fire stop. Square up and nail the header in place with the top front of header located 65-3/4” above floor plate. (See arrow on right side of header and Figure 1, 5A and 5B on Page 7). STEP 3. Rough in .” gas supply on center line of left stud either 4” above top of floor plate or 4” to right of left stud through floor plate. See Figure 1 located on Page 7. Page 7 Plaster B-W Type Vent Screw Plaster B-W Type Vent Screw ROUGH-IN INSTRUCTIONS FIGURE 1 ROUGH-IN DIMENSIONS * This *65-3/4” 14-1/4” measurement Min. must be 14-1/2” Max. taken from top of floor plate 4” 4” NOTE: For proper combustion, make sure units are level, front to back and side to side. Dry-Wall B-W Type Vent Screw Front Panel Plaster Ground NOTE: Front Panel must be in front of plaster ground channel. Do not hang it over front of plaster ground. FIGURE 5A - DRYWALL Front Panel Plaster Ground NOTE: Front Panel must be in front of plas...
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