Assessments - 5, GPA: 4.2
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That is, the first elbow and the termination "Tee", with installed screens, are assumed to be in the system and the remainder of the system must not exceed the thirty (30) equivalent feet of 3 inch pipe or eighty five (85) equivalent feet of 4 inch pipe. 3. The blower discharge adapter is made to accept only straight sections of 3" pipe. To start a minimum of 2 inches of 3" pipe must be glued into the blower discharge (See figure 6). If using 3 inch vent pipe: A minimum of 2 inches, maximum of 4 feet of 3" pipe must be attached to the blower before the first 3-inch elbow. After the first elbow add the additional venting required for the installation. The total system cannot exceed 30 equivalent feet of venting, where each elbow is equal to 5 feet of straight pipe. If using 4 inch vent pipe: Two inches of 3" pipe must be attached to the blower discharge. A 4" x 3" reducer is added and then up to maximum 4 feet of 4 inch pipe added before the first elbow. An additional 4" x 3" reducer and (1) foot of 3" pipe must be added to the end of the vent system before terminating into the 3" tee. The total system cannot exceed 85 equivalent feet of 4" venting, where each elbow is equal to 5 feet of straight pipe. NOTE: This unit can be vented using only PVC (Class 160, ASTM D-2241; Schedule 40, ASTM D-1785; or Cellular Core Schedule 40 DWV, ASTM F-891), Schedule 40 CPVC/ASTM F-441), or ABS/ASTM D-2661) pipe. The fittings, other than the TERMINATION TEE should be equivalent to PVC-DWV fittings meeting ASTM D-2665 (Use CPVC fittings, ASTM F-438 for CPVC pipe and ABS fittings. ASTM D-2661/3311 for ABS pipe. If CPVC or ABS pipe and fittings are used, then the proper cement must be used for all joints, including joining the pipe to the Termination Tee (PVC Material). FIGURE 4 7 PVC Materials should use ASTM D-2564 Grade Cement; CPVC Materials should use ASTM F-493 Grade Cement and ABS Materials should use ASTM D-2235 Grade Cement. NOTE: 1. For water heaters in locations with high ambient temperatures (above 100°F) and/or insufficient dilution air, it is recommended that CPVC or ABS pipe and fittings be used. 2. The SUPPLIED VENT TERMINAL must be used in all cases. 4. The temperature of the flue gases leaving the blower is about 160°F after mixing the dilution air in the inlet adapter of the blower. Even with high concentrate of room air taken into the vent system for dilution air, there will be some installations where condensate will be formed in the horizontal runs of the vent system. This condensate MUST NOT be allowed to drain back into the fan unit. One method to catch the condensate before it can run back to the fan is to install a "TEE" mounted upside down and capped, just past the first elbow, (Fig.9) of the vent pipe system. This set-up will require the installation of a small (1/4-3/8 inch) plastic tube, with the proper trap, to drain the condensate to a floor drain. A second method to prevent the condensate from draining back to the fan unit would be to install the vent system with a slight, 1/8 inch per five foot of pipe maximum, downward slope (max. of 5/8 inch). INSTALLATION OF SIDEWALL VENT SYSTEM Before beginning installation of piping system thoroughly read the section of this manual VENT PIPE PREPARATION. If you are installing your system so that it vents through roof, please refer to following section titled INSTALLATION OF VERTICAL VENT SYSTEM. VENT TERMINAL INSTALLATION, SIDEWALL 1. Install the vent terminal by using the cover plate as a template to mark the hole for the vent pipe to pass through the wall. BEWARE OF CONCEALED WIRING AND PIPING INSIDE THE WALL. 2. If the Vent Terminal is being installed on the outside of a finished wall, it may be easier to mark both the inside and outside wall. Align the holes by drilling a hole through the center of the template from the inside through to the outside. The template can now be positioned on the outside wall using the drilled hole as a centering point for the template. 3. A) MASONRY SIDE WALLS Chisel an opening approximately one half inch larger than the marked circle. B) WOODEN SIDE WALLS Drill a pilot hole approximately one quarter inch outside of the marked circle. This pilot hole is used as a starting point for a saws-all or sabre saw blade. Cut around the marked circle staying approximately one quarter inch outside of the line. (This will allow the vent to easily slide through the opening. The resulting gap will be covered up by the Vent Terminal cover plate.) Repeat this step on inside wall if necessary. SEQUENCE OF INSTALLATIONS, FIGURE 4 Cut a length of 3" PVC pipe about 3.5 inches longer than the wall thickness at the opening. Glue the vent terminal "TEE" with screens to this section of pipe. Slide the wall plate over the pipe to stop against "TEE". Place a bead of caulking (not supplied) around the gap between the pipe and cover plate. Apply enough to fill some of the gap between the pipe and wall. Place some of the caulking on the back of the p...
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Aquecedores de Água - BTF-75 (509.25 kb)