A.O. Smith FMD 50, FMD 40, FMD 30, 315795-000 MH instruction manual Movement Complete Joint SET, Hrs

FIGURE 21.

6.The intake air vent piping can be installed with no more than 3 elbows, see Figure 22.

FIGURE 22.

CUTTING OPENING THROUGH AN OUTSIDE WALL AND COLLAR INSTALLATION

Determine the location of the opening in the wall and cut a 3 3/4” (9.53 cm) hole (30 Gallon (113.56 Liter) & 40 Gallon (151.42 Liter)) or 4 3/4” (12.07 cm) hole (50 Gallon (189.27 Liter)) through an outside wall.

The 3” (7.62 cm) or 4” (10.16 cm) PVC, ABS or CPVC Schedule 40 vent pipe can be run from the water heater through the wall or from the wall to the water heater, whichever is most convenient. The vent pipe must extend a minimum of 1 1/2” (3.81 cm) through the exterior wall. Note that the inside collar must be slipped over the vent piping before locating the pipe through the wall. Before securing the inside and outside collars to the wall, use a silicone sealer between pipe and opening to insure a water and air tight seal, see Figure 23.

INSTALLATION SHOWING USE OF PVC, ABS OR CPVC PIPE

FIGURE 23.

NOTE: Wall collars are for aesthetic purposes and are not required for the heater to operate.

CEMENTING PVC, ABS OR CPVC PIPE AND FITTINGS

Read and observe all safety information printed on primer, cleaner, and cement containers.

Primer, cleaner, and cements are extremely flammable. They are harmful or fatal if swallowed. The vapors are harmful. They may irritate eyes and skin and can be absorbed through the skin.

Always store primer, cleaner, and cements in cool, dry, well ventilated places. Keep containers closed. Use them in well ventilated areas. Wear impervious clothing while handling. Do not smoke, eat, or drink while handling. Wash thoroughly after handling and before eating. Wear eye protection when handling. If swallowed, drink water, do not induce vomitting, and call a physician or poison control center immediately. If inhaled, get fresh air and seek medical attention if ill feelings persist. In case of eye and skin contact, immediately flush with plenty of water for 15 minuttes and seek medical attention if irritation persists. KEEP OUT OF REACH OF CHILDREN.

All primers, cleaners, and cements must meet all local codes and applicable standards of the American Society For Testing Materials Standards.

Before using primers, cleaners and cements, stir or shake, making sure contents are liquid. Do not use if found to be lumpy or jelly- like.

1.Cut pipe ends squarely removing all burrs and dirt.

2.Dry fit pipe and fittings to be connected for proper fit.

3.Clean pipe and fitting with primer/cleaner.

4.Apply a thin coat of cement to fitting, avoiding puddling inside.

5.Apply a liberal coat of cement to pipe leaving no voids.

6.QUICKLY assemble parts while cement is fluid! If you wait too long, recoat pipes.

7.Push pipe completely into socket of fitting, turning as it goes until it bottoms.

8.Hold pipe and fitting together for 30 seconds. Then carefully clean off excess with a cloth. Allow connections a sufficient time to cure before distrurbing.

9.Remember that vent pipes must be adequately and securely supported.

APPROXIMATE SETTING TIME FOR 2 1/2” (6.35 cm)

TO 4” (10.16 cm) PIPE JOINTS

TABLE 1:	MOVEMENT	COMPLETE
	OF JOINT	SET
90°F (32.22°C) TO 150°F (65.56°C)	3/4 HR.	8 HRS.
50° (10.00°C) TO 90°F (32.22°C)	1 HR.	15 HRS.
0°F (-17.78°C) TO 50° (10.00°C)	1 1/3 HR.	18 HRS.

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