PVI Industries manual 9.5Vertical or Horizontal Vent Termination, PV500-44U06/12

4.Dry-fit a solid 6” CPVC pipe into the female economizer flue outlet. Remove the pipe and apply a liberal coating of room temperature vulcanizing (RTV) adhesive to the inside of the stainless steel economizer flue outlet and to the outside of the plastic pipe. Before the RTV sets, slide the plastic coupling or elbow back into the RTV coated economizer flue outlet while rotating the pipe approximately 1/8 of a turn. Inspect and apply RTV to the inside and outside of the plastic to stainless steel joints to provide a continuous water and gas tight assembly.

5.Drill a pilot hole through the top of the stainless steel economizer flue outlet and into the 6” CPVC pipe and attach with a sheet metal screw (stainless steel screws are recommended). Repeat this step adding a sheet metal screw to each side of this economizer flue outlet to positively attach the pipe to the flue outlet. Do not drill or use a screw in the bottom of the flue connector or pipe, as condensate might drip from this point.

6.Vent support – The vent system must be supported at intervals no greater than four feet, to prevent sagging and distortion.

7.Testing for leaks - All joints in the vent system must be air and water tight. After the vent is assembled, close the end of the vent with a taped plastic bag or some other temporary closure. With the gas supply turned off, energize the combustion blower to apply air pressure to the vent system. Spray each joint and vent connection with commercially available leak detection liquid to confirm no air is escaping from any point. Repair any leaks and retest. After testing is complete, de-energize the combustion blower, wipe clean the leak detection liquid and REMOVE the temporary vent closure.

8.The solid CPVC vent pipe (Plastic venting is not allowed for models with “SANI” in the model number) must be sealed to the wall or roof at the point where it passes through the wall or roof, to prevent rain, insects or flue products from entering the living space.

9.For proper vent operation and to protect the gas vent from wind and weather, attach to the outdoor end of the vent the UL listed vent termination supplied with the Power VT Plus water heater. This termination is required for proper operation and no substitution is allowed.

10.Do not use a barometric damper with the Power VT Plus positive pressure vent.

9.5Vertical or Horizontal Vent Termination:

1.The vent terminal must have a minimum clearance of 4 feet (1.22 m) horizontally from, and in no case be located above or below, unless a 4 foot (1.22 m) horizontal distance is maintained from electric meters, gas meters, regulators and relief equipment.

2.The vent cap must terminate at least 3 feet (0.91 m) above any forced air inlet within 10 feet (3.05 m).

3.The vent shall terminate at least 4 feet (1.22 m) below, 4 feet (1.22 m) horizontally from or 1 foot (0.3 m) above any door, window or building air inlet to the building.

4.The vent system shall terminate at least 1 foot (0.3 m) above grade and at least 1 foot (0.3m) above possible snow accumulation levels and shall terminate at least 7 feet (2.13 m) above grade when located adjacent to public walkways or gathering areas.

5.To avoid a blocked flue condition, keep the vent cap clear of snow, ice, leaves, debris, etc.

6.The vent must not exit over a public walkway, near soffit vents or crawl space vents or other areas where condensate or vapor could create a nuisance or hazard or cause property or could be detrimental to the operation of regulators, relief valves or other equipment.

7.A horizontal vent must extend one foot beyond the wall.

8.A horizontal vent terminal must not be installed closer than 3 feet (0.91m) from an inside corner of an L-shaped structure.

9.A vertical vent must exhaust outside the building at least 3 feet (0.91m) above the point of the exit and at least 2 feet (0.61 m) above the highest point of the roof within a 10-foot (3.05 m) radius of the termination.

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PV500-44U 06/12