Flex Vent Installation - Majestic 400DVBL Installation And Operating Instructions Manual

Dvbl series direct vent gas fireplace

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Installation and operating instructions manual (68 pages)

Table Of Contents

Table of Contents

1. Flexible UL177 listed venting may be used in any venting application where rigid direct vent components can

be used. All restrictions, clearances and allowances that pertain to the rigid piping apply to the flexible

venting. Flex kits may not be modified. Flex kits may be added to the

end of a vent run made of rigid vent sections using pipe manufactur-

er's approved flex to pipe adapters. This may occur only if doing

so does not violate any of the venting length, height, routing,

horizontal to vertical ratio requirements or clearance consid-

erations detailed in this manual.

2. The flex adapter starter kit (DVFA/8) is used to attach

flex venting to the appliance starting collar. It includes 4"

inner and 7" outer adapter rings. (Refer to Figure 29)

• The inner and outer adapter rings are required to start

all flex runs.

• Never install damaged or torn flexible venting.

• Over tightening clamps may rip, tear, or otherwise

damage flexible venting.

• The adapter kit does not include individual pipe sec-

tions which may be purchased separately. (UL177

listed type venting only.)

3. Start the flexible vent as follows:

A. Installing the inner flex adapter and pipe. See Figure

1. Insert the long side of the 4" inner ring into exhaust

pipe, gently tap to seat into place, and secure with

screws.

2. Slide the small gear clamp over the inner flexible

vent pipe, and push out of the way.

3. Pull and extend the inner flexible vent.

4. Slide the inner vent onto the adapter collar, for a minimum 1

5. Locate the clamp at approximately 3/4" from the flex end and tighten.

6. Secure the clamped inner section with three self-tapping screws, drilled equidistant, just above the clamp

perimeter.

B. Installing the outer flex pipe. See Figure 29.

1. Firmly insert the outer adapter ring into the outer appliance starting collar and secure with screws.

2. Slide the large gear clamp over the outer flexible vent pipe, and push out of the way.

3. Pull and extend the outer flexible vent.

4. Slide the outer vent onto the appliance collar outer adapter for a mini-

mum 1

" overlap.

5. Locate the clamp at approximately 3/4" from the flex end and tighten.

6. Secure the clamped outer section with three self-tapping screws, drilled

equidistant, just above the clamp perimeter.

C. Routing UL177 flex pipe.

1. Always maintain the required clearance when routing the flex vent

assembly.

2. Install firestop spacers (See Figure 31) when penetrating ceiling, attic

spaces, or walls.

Flex vent pipe spacers: Refer to manufacturer's

specifications for correct positioning of the spacer springs to

maintain proper distance between inside and outside pipe.

74D0010