Hearth and Home Technologies NDV3630I Î L. Install Heat Shields and Horizontal Termi nation Cap

ÎL. Install Heat Shields and Horizontal Termi-

nation Cap

Note: For installations using black pipe, slide the decorative wall thimble over the last vent pipe before connecting the termination

cap to the pipe. When this connection has been made, slide the wall thimble up to the interior wall surface and attach with screws provided. See figure 10.25

Figure 10.25 Wall Thimble

Heat Shield Requirements for Horizontal Termi- nation

For all horizontally vented appliances, a heat shield MUST be placed one in. above the top of the vent be- tween the wall shield firestop and the base of the termina- tion cap.

There are two sections of the heat shield. One section is factory-attached to the wall shield firestop. The other section is factory-attached to the cap. See Figure 10.26.

If the wall thickness does not allow the required 1-1/2 in. (38 mm) heat shield overlap when installed, an extended heat shield must be used.

WARNING! Risk of Fire! To prevent overheating and fire, heat shields must extend through the entire wall thickness. Heat shields must overlap 1-1/2 in. (38 mm) minimum.

•DO NOT remove the heat shields attached to the wall shield firestop and the horizontal termination cap (shown in Figure 10.26).

•If the wall thickness is less than 4 in./102 mm (DVP) or 4-3/8 in./ 111 mm (SLP), the heat shields on the cap and wall shield firestop must to be trimmed. A minimum 1-1/2 in. (38 mm) overlap MUST be maintained.

•Use an extended heat shield if the finished wall thickness is greater than 7-1/4 in. (184 mm).

•The extended heat shield may need to be cut to length maintaining sufficient length for a 1-1/2 in. (38 mm) overlap between heat shields.

•Attach the extended heat shield to either of the existing heat shields using the screws supplied with the extended heat shield.

•Rest the small leg on the extended heat shield on top of the pipe section to properly space it from the pipe section.

Important Notice: Heat shields may not be field constructed.

Heatilator • Novus NDV Series • 4055-187 Rev F • 06/08 47