Troubleshooting. M&G Duravent 3GV60, 5GVAF, 4GVRRA4, 3GVFS, 4GV60F, 3GVIS, 3GVRS4, 3GVFF, 4GVRS, 4GVX8

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, as shown in Figure

31 . 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 DuraVent Dealer,

Distributor, or DuraVent’s Engineering

Department. It is imperative that the oneinch 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 section of these instructions For

Oval B-vent,, 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, ensuring 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 (a minimum of

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 vent cap.

4. Blockage.

Check the system for blockage by removing the cap, and looking down into the vent with a flashlight. Check for bird nests, debris, rodents, insects, or other obstructions.

If nothing is found, inspect the entire system for physical damage.

5. Downdraft.

Downdrafts are generally caused by the system’s termination being too close to an adjacent wall, parapet, or other structure. If the cap is within eight feet of such an obstruction, it must also be at least two feet above it. Also ensure that the top is at the height prescribed for your roof pitch in Table

2. Inadequate combustion air is also a major cause of downdraft problems. Appliances like clothes dryers or other exhausting appliances in the same utility room can cause downdraft problems.

6. Condensate/Corrosion.

Continuous condensate can cause corrosion (rusting) of vents, tops, appliance draft hoods, and other components of the system, as well as the inside of the appliance. This situation can be extremely dangerous, and corrective action must be taken immediately. Common causes of corrosion are listed below: If in doubt call a professional to inspect the vent.

(a) If the vent system is located in an area where spray cans or solvents are used extensively, (laundry areas, or paint shops,

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