41978-2-0321
Page 40
DVVK-4F FLEX VENT INSTRUCTIONS
The DVVK-4F FLEX VENT KIT includes the following components:
•
Horizontal Termination Cap
•
4 feet section of Flex vent with spacers
(4 inch flue/7 inch outer pipe)
•
4 inch diameter Flue adapter collar
•
7 inch diameter Outer Vent adapter collar
•
Wall Firestop/Thimble Assembly
•
Hardware pack that includes band clamps and screws
Flex venting can be installed either vertically or horizontally off
of the fireplace. When installing a horizontal vent run from top
connections, maintain at least 1/2 inch rise for every 12 inches of
vent run. When venting horizontal off the rear vent connections,
allow a minimum rise of 2 inch. Refer to Page 14 when mounting
termination near vinyl siding.
CAUTION
•
Always stretch and secure venting with wire or metal
strapping to ensure that the horizontal runs do not sag.
•
If space permits, it is generally easier to attach venting in
the top vent configuration.
•
Because of sharp edges, always use gloves when
handling the flex vent components.
•
Vent connections should overlap a minimum of 1” for
proper sealing.
•
Always follow the general venting requirements for vent
terminal location, vent lengths, and clearance to
combustible materials.
STEP-BY-STEP INSTALLATION
1. Unpack vent components and check that all items are included.
2. Check to see that the vent spacer springs are located around
the flue vent at 8 inch and 12 inch intervals along its length.
See Figure A.
If not, stretch the spacer springs to about 15
inches long and wrap them around the flue, then interlock the
ends of each spring about 2 inches.
See Figure B.
Maintain
equal distance between spring spacers.
SPACER
SPRINGS
FLEX FLUE PIPE
FLEX OUTER VENT
Figure A
8
(203 mm)
8
(203 mm)
8
(203 mm)
4 FLEX
VENT PIPE
SPACER
SPRING
””
”
”
”
Figure B
3. Remove the 6-5/8 inch diameter Vent collar from the fireplace.
Replace this collar with the 7 inch diameter Flex Vent adapter
collar provided with the vent kit.
4. Slide the Flex Vent flue pipe into the Outer Flex Vent pipe.
5. Install the Wall Firestop/Thimble assembly as required through
the wall. Refer to the venting charts in the fireplace manual to
determine the proper height and size of the vent opening. The
minimum opening should be 9 inch wide by 11 inch high. The
minimum combustible clearance from the horizontal vent is 1
inch from sides and bottom, and 3 inch above the vent pipe.
See Figure C.
TOP OF VENT
COMBUSTIBLES NOT
ALLOWED IN SHADED
AREA
4” DIAMETER
FLUE
7” DIAMETER
INTAKE VENT
Figure C
6. In most cases, after determining the length of the vent that
is needed, it may be easier to install the flue and outer vent
pipes to the Termination Cap first, then from the outside, feed
the venting through the wall to the fireplace.
7. If the venting is to long, trim off any excess vent before
attaching the vent end connectors.
CAUTION
Do not use force when installing the Horizontal Vent Termination
into the flex venting. Always stretch venting out first, then cut off
excessive vent material prior to sliding the vent termination into
the flue and inlet venting. Forcing the termination cap into the
flex venting will deform the flue venting, which will restrict the
exhaust gases, and cause improper operation of the fireplace.
8. Attach the Termination Cap to the outside of the house.
9. Prior to making the vent connections, apply high temperature
sealant (600 degree F min.) to the vent connections before
securing with the band clamps provided.
NOTICE:
the
flue pipe end
without the adapter
is to be installed to the
Termination Cap.
10. Apply sealant to the outside of the flue pipe adapter and
connect to the flex flue pipe. Then insert the adapter into the
fireplace flue. Secure flue adapter to the fireplace flue with a
minimum of two screws provided.
See Figure D.
Figure D
11. Attach the Outer Vent pipe to the 7 inch diameter Collar on the
fireplace with a large band clamp provided. Sealant may also
be used on the outer vent connections.
12. Check all vent connections for tightness. Make sure horizontal
venting has the proper rise and combustible clearances required.
Refer to venting charts in fireplace instruction manual.
COMBUSTIBLES NOT
ALLOWED IN SHADED AREA
4" DIAMETER FLUE
7" DIAMETER
INTAKE VENT
1" (25 mm)
TOP OF VENT
1" (25 mm)
3" (76 mm)
7" DIA. FLEX
VENT PIPE
4" DIA. FLEX
FLUE PIPE
4" DIA. FLUE
ADAPTOR COLLAR
7" DIA. INLET
ADAPTOR COLLAR
(WITH GASKET)
BAND CLAMP
APPLY HIGH
TEMPERATURE
SEALANT
SPACER
SPRINGS
FLEX FLUE PIPE
FLEX OUTER VENT
8"
(203 mm)
8"
(203 mm)
8"
(203 mm)
4"
FLEX VENT
PIPE
SPACER
SPRING
