Lochinvar RPV-I&S service manual Figure Figure, Through The Wall Venting, Rpv-I&S

RPV-I&S

diameter PVC pipe. When venting with 4" (10.2 cm) PVC, use a 4" (10.2 cm) to 3" (7.6 cm) reducer to exit through the building wall with 3" (7.6 cm) PVC. Use the 3" (7.6 cm) vent terminal supplied with the water heater to terminate on the outside of the building. If the length of 3" (7.6 cm) PVC needed to go through the wall is greater than 14" (35.5 cm), use 4" (10.2 cm) to go through the wall and reduce to 3" (7.6 cm) PVC immediately after exiting the outside wall. Refer to the venting illustrations on the following pages. Make sure the vent pipe terminal elbow fitting is at least 1" (2.5 cm) away from the edge of the wall.

VENT CONNECTOR LENGTHS FOR 3" (7.6 cm) DIAMETER PVC

Terminating	# of 90° Elbows	Maximum	Minimum
	(excluding vent	Length	Length
	terminal)
Through the Wall	1	40 ft (12.2 m)	2 ft (.6 m)
Through the Wall	2	35 ft (10.7 m)	3 ft (.9 m)
Through the Wall	3	30 ft (9.1 m)	5 ft (1.5 m)
Through the Wall	4	25 ft (7.6 m)	8 ft (2.4 m)
Through the Roof	1	40 ft (12.2 m)	2 ft (.6 m)
Through the Roof	2	35 ft (10.7 m)	3 ft (.9 m)
Through the Roof	3	30 ft (9.1 m)	5 ft (1.5 m)
Through the Roof	4	25 ft (7.6 m)	8 ft (2.4 m)

IMPORTANT

All of the Venting connections must be leak checked with a soap and water solution upon initial start up of the water heater. Any leaks must be repaired before continuing operation of the water heater.

NOTE: ABS or CPVC pipes may be substituted for PVC pipe. Do not mix ABS and PVC pipe in the same installation.

THROUGH THE WALL VENTING:

Cut a 3-1/2 inch (8.9 cm) diameter hole in the wall at the point where the vent connector is going to pass through the wall. Use the proper cement to secure the 90° vent terminal provided with the water heater to the vent connector. The distance between the edge of the 90° vent terminal and the exterior wall (see Figure 3) must be 1 inch (2.5 cm). Use the proper cement and assembly procedures to secure the vent connector joints between the terminal and the blower outlet. Provide support brackets for every 3 feet (.91 m) of horizontal vent.

VENT CONNECTOR LENGTHS FOR 4" (10.1 cm) DIAMETER PVC

Terminating	# of 90° Elbows	Maximum	Minimum
	(excluding vent	Length	Length
	terminal)
Through the Wall	1	70 ft (21.3 m)	2 ft (.6 m)
Through the Wall	2	65 ft (19.8 m)	3 ft (.9 m)
Through the Wall	3	60 ft (18.3 m)	5 ft (1.5 m)
Through the Wall	4	55 ft (16.8 m)	8 ft (2.4 m)
Through the Wal	5	50 ft (15.3 m)	12 ft (3.6 m)
Through the Roof	1	70 ft (21.3 m)	2 ft (.6 m)
Through the Roof	2	65 ft (19.8 m)	3 ft (.9 m)
Through the Roof	3	60 ft (18.3 m)	5 ft (1.5 m)
Through the Roof	4	55 ft (16.8 m)	8 ft (2.4 m)
Through the Roof	5	50 ft (15.3 m)	12 ft (3.6 m)

NOTE: When using 4" (10.1 cm) PVC, use a 4" (10.1 cm) to 3" (7.6 cm) reducer and exit the building wall with 3"(7.6 cm) PVC using the 3" (7.6 cm) 90° vent terminal supplied. Two 45° elbows are equivalent to one 90° elbow.

Figure 3

THROUGH THE ROOF VENTING: (VERTICAL VENTING)

Cut the necessary holes through the roof and ceiling and install the vent connector as shown in Figure 4. Make sure that the installation meets the local codes and/or The National Fuel Gas Code ANSI Z223.1 (Latest Edition) or CGA/ CAN B149 Installation Code.

Figure 2

Figure 4

4