Heatiator NNXT4236IL NNXT3933I, NNXT3933IL owner manual Install Vertical Termination Cap

I. Install Vertical Termination Cap

•Attach the vertical termination cap by sliding the inner collar of the cap into the inner flue of the pipe section while placing the outer collar of the cap over the outer flue of the pipe section.

•Secure the cap by driving three self-tapping screws (supplied) through the pilot holes in the outer collar of the cap into the outer flue of the pipe (see Figure 10.18).

Termination Cap

Brackets/	(1 of three)
Bolts

Storm

Collar

Screws

Caulk

Figure 10.18

J.Install Decorative Wall Components (SLP only)

A decorative wall thimble can be installed on an interior wall through which the vent passes. The decorative wall thimble is used to cover the wall shield firestop.

•Slide the decorative wall thimble over the last section of horizontal pipe before passing through the wall to the outside.

•Once the pipe section and the termination cap have been connected, slide the wall thimble up to the interior wall surface and attach with screws provided. See Figure 10.19.

Figure 10.19 Wall Thimble

K. Heat Shield Requirements for Horizontal Termination

WARNING! Risk of Fire! To prevent overheating and fire, heat shields must extend through the entire wall thick- ness.

•DO NOT remove the heat shields attached to the wall shield firestop and the horizontal termination cap.

•Heat shields must overlap 1-1/2 in. (38 mm) mini- mum.

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 10.20.

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.

•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 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. Refer to “Vent Components Diagrams” in the back of this manual.

•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.

46 Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12