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 45° ELBOW 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 45° Elbow (PVC Material). If local codes do not allow the use of the PVC termination when a material other than PVC is used for venting, than an equivalent fitting of that material may be substituted if the screen in the PVC terminal is removed and inserted into the new fitting.
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: A. 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. B. The SUPPLIED VENT TERMINAL or a precisely identical vent terminal of CPVC or ABS material must be used in all cases. If a new terminal is used, the screen inside the supplied terminal must be installed into the new terminal.
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.
CONDENSATE
Condensate formation does not occur in all installations of power vented water heaters, but should be protected against on installations where it can form in the venting system. Condensation in the venting system of power vented water heaters is dependent upon installation conditions including, but not limited to ambient temperature and humidity of installation location, ambient temperature and humidity of venting space, vent discharge and slope, and product usage. In certain conditions, installations in unconditioned space or having long horizontal or vertical vent runs may accumulate condensate. In these conditions, the vent pipe should be sloped downward away from the blower assembly (not less than 1/8" (3.2 mm) nor greater than 1/2" (12.7 mm) per foot maximum). If the vent piping is vented level or sloped upwards away from the blower assembly, then adequate means for draining and disposing of the condensate needs to be made by the installer (if condensate is detected). If you have condensate, then a 3/8" drain hose can be connected to the built-in drain port of the rubber boot on the blower assembly. For your convenience, the rubber boot is supplied with a removable cap on the built-in drain port. Prior to operating the water heater, make sure the removable cap is installed on the drain port (if a drain hose is not needed).
INSTALLATION OF 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 WIRINGAND 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 5
Cut a length of 3" PVC pipe about 3.5 inches longer than the wall thickness at the opening. Glue the vent terminal "45° Elbow" with screen to this section of pipe. Slide the wall plate over the pipe to stop against "45° Elbow". 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 plate to hold it against the wall after installation. If the vent pipe is installed up to the wall, with a coupling on the end against the wall opening, the pipe with the vent terminal can be prepared for gluing before inserting through the wall. Slide the pipe through the wall and insert into the coupling on the other side of the wall, making sure that the vent terminal ends up pointed in the correct position. (See fig. 5).
VENT TERMINATION - FIGURE 5
PREPARATION OF BLOWER ASSEMBLY
1.Check to make sure that the wire harness is attached to the gas valve and blower control box.
2.Make sure no material is still attached to the outside or inside of blower assembly.
MUST INSTALL MINIMUM OF 2" LONG PIECE OF 3" PIPE INTO ELBOW TO MOUNT ON BLOWER DISCHARGE ADAPTER. MAXIMUM LENGTH FOUR
(4) FEET.
FIGURE6
