LG Electronics MP03-VDLPM Framing Dimensions for Roof Pitch, 12/12, Swivel Joint

Loop the tape around the vent, securing the ends of the tape to the framing. If desired, sheet metal screws #6 x 1/2" length may be used to secure the support straps to the vent pipe. Refer to Figure 17.

H. Change vent direction to horizontal/in- clined run - At transition from or to a horizon- tal/inclined run, install the SV4.5E45 and SV4.5E90 elbows in the same manner as the straight vent sections. The elbows feature a twist section to allow them to be routed about the center axis of their initial collar section to align with the required direction of the next vent run element. Twist elbow sections in a clockwise direction only so as to avoid the possiblity of unlocking any of the previously connected vent sections. See Figure 18.

4-13/16"	8-1/8"
	(206 mm)
(122 mm)

Swivel Joint		Swivel Joint
(360°	swivel)
		(360° swivel)

SV4.5E45	SV4.5E90
(45° Elbow)	(90° Elbow)

Figure 18

I. Continue installation of horizontal/inclined sections - Continue with the installation of the straight vent sections in horizontal/inclined run as described in Step E. Install support straps every 5' (1.52 m) along horizontal/ inclined vent runs using conventional plumber’s tape. It is very important that the horizontal/ inclined run be maintained in a straight (no dips) and slightly elevated plane in a direc- tion away from the fireplace 1/4" per foot (20

mmper meter) which is ideal, though rise per foot run ratios that are smaller are acceptable all the way down to at or near level.

It is important to maintain the required clear- ances to combustibles at the top and bottom for all horizontal/inclined runs.

Maintain a minimum 1" (25 mm) clearance to combustible materials for all vertical vent elements.

Clearances for horizontal vent elements are 1" (25 mm) at the sides and 1" (25 mm) on the bottom. Clearances above horizontal vent elements are 3" (76 mm) for all models and all applications. Exception: Clearance is 5" (127 mm) for MPLDV35, MPLDV40 & MPLDV45, when the center line of the hori- zontal run is less than 48" (1219 mm) above the fireplace top wrapper surface.

H. Frame roof opening - Identify location for vent at the roof. Cut and/or frame opening per Roof Framing Chart and Figure 19.

C

D

Framing Dimensions for Roof

Pitch	C	D
0/12	10-1/2 in.	10-1/2 in.
	(267 mm)	(267 mm)
6/12	10-1/2 in.	12 in.
	(267 mm)	(305 mm)
12/12	10-1/2 in.	17-3/4 in.
	(267 mm)	(451 mm)

Figure 19

J. Install the roof flashing - Extend the vent sections through the roof structure. Install the roof flashing over the vent section and posi- tion such that the vent column rises vertically (use carpenters level) (Figure 20 ). Nail along perimeter to secure flashing or adjust roofing to overlap the flashing edges at top and sides only and trim where necessary. Seal the top and both sides of the flashing with waterproof caulking.

Figure 20

K. Install the storm collar - Install the storm collar, supplied with the flashing, over the vent/flashing joint. See Figure 21. Loosen the storm collar screw. Slide collar down until it meets the top of the flashing. Tighten the adjusting screw. Apply non-combustible caulk- ing or mastic around the circumference of the joint to provide a water tight seal.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Storm

Collar

Figure 21

L. Install the vertical termination - The final step involves installation of the SV4.5CGV-1 Vertical Termination. Extend the vent sections to the height as shown in the "Vertical vent termination section" on page 6. The SV4.5CGV-1 Vertical Termination (Figure 22 ) installs in the exact same fashion as any other Secure Vent section. Align the termination over the end of the previ- ously installed section, adjusting the radial align- ment until the four locking dimples of the termi- nation are aligned with the inlets of the four incline channels of the last vent section. Push the termination down until it fully engages, then twist the termination clockwise running the dimples down and along the incline channels until they seat at the end of the channels.

Figure 22

If the vent system extends more than 5' (1.5

m)above the roof flashing, stabilizers may be necessary. Additional screws may be used at section joints for added stability. Guide wires may be attached to the joint for additional support on multiple joint configurations.

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