American Water Heater VG6250T100 instruction manual Concentric Termination Flat Roof Clearance, A

5.Secure assembly to roof structure as shown in Figure 23 using field supplied metal strapping or equivalent support material.

NOTE: Ensure termination height is above the roof surface or anticipated snow level as shown in Figure 23.

6.Install rain cap and small diameter pipe assembly in roof penetration assembly, Ensure small diameter pipe is cemented and bottomed in Y concentric fitting.

7.Cement water heater combustion air intake and vent pipes to concentric vent termination assembly. See Figure 23 for proper pipe attachment.

8.Operate heater through 1 heat cycle to ensure combustion air and vent pipes are properly connected to concentric vent termination connections.

Flat Roof Installation

When installing a concentric termination vertically through a flat roof, the termination’s vent cap must be a minimum of 10 feet (3

m)away from any parapet, vertical wall or structure as shown in Figure 23A.

If this required 10 foot (3 m) distance to a parapet, vertical wall or structure cannot be maintained, standard terminations must be used. See Vertical Termination Installation.

CONCENTRIC TERMINATION(S) MUST BE A MINIMUM OF 10 FEET (3 m) AWAY FROM ANY PARAPET, VERTICAL WALL OR STRUCTURE.

CONCENTRIC TERMINATION

FLAT ROOF CLEARANCE

Figure 23A.

PROCEDURE 2 SIDE WALL TERMINATION, see Figure 24.

Figure 24.

1. Determine best location for termination kit.

NOTE: Consideration for the following should be used when determining an appropriate location for the termination kit:

•Termination kit positioned where the vent vapors will not damage plants/shrubs or air conditioning equipment.

•Termination kit positioned so it will not be affected by wind eddy that may allow recirculation of combustion products, or airborne leaves, or light snow.

•Termination kit positioned where it will not get damaged or be subjected to foreign objects, such as stones, balls, etc.

•Termination kit positioned where the vent vapors will not be objectionable.

NOTE: See the venting information (starting on page 20) in this manual for additional vent location requirements.

2.Cut 1 hole (5 in. diameter)

3.Partially assemble concentric vent termination kit .

a)Cement the Y concentric fitting to larger diameter kit pipe, see Figure 19.

b)Cement the rain cap to the smaller diameter kit pipe, see Figure 22.

NOTE: Instead of cementing the smaller pipe to the rain cap, a field-supplied stainless steel screw may be used to secure the 2 components together when field disassembly is desired for cleaning, see Figure 22.

When using alternate screw assembly method, drill clearance hole in rain cap and pilot hole in vent pipe for screw being used. Failure to drill adequate holes may cause cracking of PVC components, allowing combustion products to be recirculated. Failure to follow this warning could result in personal injury or death.

Do not operate the heater with rain cap removed or recirculation of combustion products may occur. Water may also collect inside larger combustion-air pipe and flow to the burner enclosure. Failure to follow this warning could result in product damage or improper operation, personal injury or death.

4.Install Y concentric fitting and pipe assembly through structure’s hole.

NOTE: Do not allow insulation or other materials to accumulate inside pipe assembly when installing through hole.

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