Troubleshooting guide

through the access door while someone twist-locks the Pipe Section to it. Use

an Adjustable Pipe Length as needed to obtain a specific location for the

appliance. Make a mark on the horizontal Pipe Section flush with the vertical

face of the masonry, for referencing the vertical position. Slip a Pipe Collar

over the horizontal Pipe Section and install the remaining fittings as shown in

Figure 30. A minimum of 12 inches of connector rise is required.

(i). Insulation. Pull the Pipe Collar towards the 90° Elbow. Fill in the

gap between the masonry and the horizontal

Pipe Section with ceramic fiber insulation

or fiberglass, as shown in Figure 31. If

fiberglass is used, remove any paper

backing. The filling may be faced off with

grout, if desired. Push the Pipe Collar

back flush with the masonry. Make any

final adjustments on the Adjustable

Length Pipe (if used), and tighten the

clamping bolts.

TROUBLESHOOTING

1. Purpose. This section is intended as a general maintenance and

troubleshooting guide, and as such, cannot encompass all configurations or vent

designs. For problems encountered which are beyond the scope of this sheet,

contact your Dura-Vent Dealer, Distributor, or Simpson Dura-Vent's Engineering

Department. It is imperative that the one-inch clearance (air space) defined

in these instructions be maintained. In most cases, a one-inch minimum

clearance must be maintained to combustibles. The only exceptions are 4-inch, 5-

inch and 6-inch Oval B-vent which are installed within stud walls. Oval B-vent

and BW Vent are the subject of a separate installation instruction, and are not

discussed here. In these cases, the clearances are established by the listed Firestop

Spacers described in the instructions for Oval B-Vent.

2. Appliance. Read the appliance installation instructions carefully, insuring

that the prescribed clearances are met, and that it is a Category I appliance.

3. Spillage. Spillage from an appliance draft hood may cause condensation

on windows, or odors that the occupant may notice. Spillage may be caused

by an incorrectly sized vent system, blockage of the vent system, or a downdraft

in the vent. Other causes are: excessive lateral runs, too many elbows, improper

pitch to lateral runs (1/4 inch per foot of run is correct), fans or ventilation

systems in the same general area as the gas appliance, or wind conditions at the

CERAMIC

FIBER

INSULATION

Fig 31