Hearth & Home DVP User manual

Hearth & Home Technologies • DVP Venting System • 4033-215 Rev E • 11/20/17 1
tm
Models:
DVP Venting System
Installation
Instructions
These venting system components have been tested for use with approved HHT Direct Vent appliances. Check with your
local building code agency before you begin installation to ensure compliance with local codes, including the need for per-
mits and follow-up inspections. If you encounter any problems regarding code approvals, or if you need clarication of any
of the instructions contained here, contact your Hearth & Home Technologies dealer. For the dealer nearest you, please
visit www.hearthnhome.com.
CAUTION! Risk of Cuts/Abrasions. Wear protective
gloves and safety glasses during installation. Sheet metal
edges are sharp.
A. Pipe Clearances to Combustibles
Refer to appliance installation manuals for clearances.
WARNING! Risk of Fire! Maintain air space clearance to
vent. DO NOT pack insulation or other combustibles:
• Betweenceilingrestops
• Betweenwallshieldrestops
• Around vent system
Failure to keep insulation or other material away from vent
pipemaycauseoverheatingandre.
B. Wall Penetration Framing
• Wherever a combustible wall is penetrated, the hole
must be framed and a wall shield installed. When a wall
is penetrated the wall shield is only required on one side
and no heat shield is necessary. If your local inspector
requires a wall shield on both sides, then both wall
shields must have a heat shield attached to them. These
shields maintain minimum clearances and restrict cold air
inltration.
• If the wall being penetrated is of noncombustible materials
(material which will not ignite or burn, or has a UL re
rating of zero), a hole 1 in. (25 mm) larger in diameter
than the pipe is acceptable.
Figure 1 Minimum Horizontal Venting Clearances to Combustible
Materials
3 in. (76 mm)
top clearance
1 in. (25 mm) side
bottom clearance.
Heat
Shield
Wall
Shield
Firestop
Heat
Shield
WALL
Note: Heat shields MUST overlap by a minimum of 1-1/2 in. (38mm). The
heat shield is designed to be used on a wall 4 in. to 7-1/4 in. (102
mmto 184 mm) thick. If wall thickness is less than 4 in. (102 mm) the
existing heat shields must be field trimmed. It wall thickness is greater
than 7-1/4 in. (184mm) a DVP-HSM-B will be required.
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Hearth & Home Technologies • DVP Venting System • 4033-215 Rev E • 11/20/17
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C. Install the Ceiling Firestop
• Frame an opening 10 in. x 10 in. (254 mm x 254 mm)
whenever the vent system penetrates a ceiling/oor (see
Figure 2)
• Frame the area with the same sized lumber as used in
ceiling/oor joist.
• When installing a top vent vertical termination appliance
the hole should be directly above the appliance, unless
the ue is o󰀨set.
• The ceiling restop may be installed above or below the
ceiling. Refer to Figure 3.
• Secure with three fasteners on each side.
• Do not pack insulation around the pipe. Insulation must
be kept away from the pipe.
Figure 2 Installing Ceiling Firestop
3 fasteners
per side
Ceiling firestop
installed below ceiling.
Ceiling firestop
installed above ceiling.
Install attic insula-
tion shields before
or after installation
of vent system.
Figure 3 Installing Ceiling Firestop & Attic Insulation Shield
Flat Ceiling Installation
• Remove one shield from box.
Note: Cut previously installed batt insulation to make
room for the attic insulation shield.
• Wrap shield around pipe if pipe is already installed in area
to be insulated.
• Match the three holes in each side and fasten with three
screws to form a tube.
• One or more tabs may be folded outward on the bottom
of the shield to allow attachment to ceiling restop.
• Bend remaining tabs inward on bottom of shield where
it rests on the ceiling restop to maintain the air space
between the pipe and shield. Set the shield on the ceiling
restop.
• Bend all tabs inward 90° around the top of the shield.
These tabs must be used to prevent blow-in insulation
from getting between the shield and vent pipe, and to
maintain clearance.
Vaulted Ceiling Installation
• The attic insulation shield has been laser-etched with cut
lines and ceiling pitches to make eld trimming easier.
• Remove one shield from box.
Note: Cut previously installed batt insulation to make
room for the attic insulation shield.
• Cut the attic insulation shield (if application is for vaulted
ceiling) using a laser-etched cut line, to t your ceiling
pitch. Snip cut edge to create three bend tabs.
• Wrap shield around pipe if pipe is already installed in area
to be insulated.
• Match the three holes in each side and fasten with three
screws to form a tube.
• One or more tabs may be folded outward on the bottom
of the shield to allow attachment to ceiling restop.
• Bend remaining tabs inward on bottom of shield where
it rests on the ceiling restop to maintain the air space
between the pipe and shield. Set the shield on the ceiling
restop.
• Bend all tabs inward 90° around the top of the shield.
These tabs must be used to prevent blow-in insulation
from getting between the shield and vent pipe, and to
maintain clearance.
D. Install Attic Insulation Shield
WARNING! Fire Risk. DO NOT allow loose materials or
insulation to touch vent. Hearth & Home Technologies re-
quires the use of an attic shield.
The National Fuel Gas Code ANSI Z223.1 requires an
attic shield constructed of 26 gauge minimum metal that
extends at least 2 in. (51 mm) above insulation.
Attic shields must meet specied clearance and be se-
cured in place.
Attic Above
10 in. (254 mm)
Hole should measure
10 in. x 10 in.
inside to inside
10 in. (254 mm)

Hearth & Home Technologies • DVP Venting System • 4033-215 Rev E • 11/20/17 3
Bend all tabs inward
90° to maintain
clearance and
prevent insulation
from falling inside
Insert 3
screws
Bend 4 tabs
inward 90°
to maintain
clearance
Figure 4 Attic Insulation Shield
E. Assemble DVP Vent Sections
WARNING! Risk of Fire/Explosion/Asphyxiation! Im-
proper support may allow vent to sag and separate. Use
vent run supports and connect vent sections per installa-
tion instructions. DO NOT allow vent to sag below connec-
tion point to appliance.
• Slide the male end of the inner ue over the inner collar
of the appliance, at the same time, slide the outer ue
over the outer collar of the appliance.
• Push the pipe section into the appliance collar until all
the lances have snapped in place.
• Tug slightly on the section to conrm it has completely
locked into place.
Commercial, Multi-family (multi-level exceeding two
stories), or High-rise Applications
For installation into a commercial, multi-family (multi-level
exceeding two stories), or high-rise application: All outer
pipe joints must be sealed with high temperature silicone,
including the slip section that connects directly to the hori-
zontal termination cap.
• Apply a bead of silicone sealant inside the female outer
pipe joint prior to joining sections. See Figure 5.
• Only outer pipes are to be sealed. Do not seal the inner
ue. All unit collar, pipe, slip section, elbow and cap outer
ues shall be sealed in this manner, unless otherwise
stated.
Note: The end of the pipe sections with the lances/tabs
on it will face toward the appliance.
Attach the First Vent Component to Starter Collar
To attach the rst vent component to the starting collar of
the appliance:
High Temperature Silicone Sealant
Commercial, Multi-family (multi-level exceeding two
stories), or High-rise Applications only
or
Dimples
Figure 5 High Temperature Sealant
Assemble Pipe Sections
Insert the inner ue of section A into the ared inner ue of
section B. (See gure 6).
Start the outer ue of section A over the outer ue of section
B.
Once both inner and outer ues are started, press section A
onto section B rmly until all lances have snapped into place.
Check to make sure they have snapped together (see Figure
7) and the seams are not aligned (see Figure 8). Tug slightly
on section A to conrm it has completely locked into place.
It is acceptable to use screws no longer than 1/2 in. to hold
outer pipes together. If predrilling screw holes do NOT pen-
etrate inner pipe.
For 90° and 45° elbows that are changing the vent direction
from horizontal to vertical, one screw minimum should be put
in the outer ue at the horizontal elbow joint to prevent the el-
bow from rotating. Use screws no longer than 1 in. If predrill-
ing screw holes do NOT penetrate inner pipe.
A
B
Figure 6 Inner/Outer
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Hearth & Home Technologies • DVP Venting System • 4033-215 Rev E • 11/20/17
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Note: When installing a vent system with an HRC
termination cap, all pipe system joints shall be sealed using
a high-temperature silicone sealant.
• Apply a bead of silicone sealant inside the female outer
pipe joint prior to joining sections.
• Only outer pipes are sealed, sealing the inner ue is not
required. All unit collar, pipe, slip section, elbow and cap
outer ues shall be sealed in this manner.
Check appliance installlation instructions for approval
with HRC Series cap.
Figure 9 MI Sections
WARNING! Risk of Fire/Explosion! DO NOT break sili-
cone seals on slip sections. Use care when removing ter-
mination cap from slip pipe. If slip section seals are broken
during removal of the termination cap, vent may leak.
A
B
Figure 7 Snapped Assemble Slip Sections
The outer ue of the slip section should slide over the outer
ue of the pipe section and into (inner ue) the last pipe
section (see Figure 10) .
Slide together to the desired length, making sure that a
1-1/2 in. outer ue overlap is maintained between the pipe
section and slip section.
The pipe and slip section need to be secured by driving two
screws through the overlapping portions of the outer ues
using the pilot holes (see Figure 11).
This will secure the slip section to the desired length and
prevent it from separating. The slip section can then be at-
tached to the next pipe section.
If the slip section is too long, the inner and outer ues of
the slip section can be cut to the desired length.
Fire Risk
Exhaust Fumes Risk
• Overlap pipe slip sections at least
1-1/2 inches.
• Use pilot holes for screws.
• Screws must not exceed 1/2 in. long.
• Pipe may separate if not properly
joined.
WARNING
CORRECT INCORRECT
Make sure the seams are not aligned to prevent unintentional
disconnection.
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Hearth & Home Technologies • DVP Venting System • 4033-215 Rev E • 11/20/17 5
Figure 10 Slip Section Pilot Holes
Figure 11 Screws into Slip Section
Secure the Vent Sections
Vertical secitons of pipe must be supported every 8 ft. after
the 25 ft. maximum unsupported rise. The vent support or
plumber’s strap (spaced 120° apart) may be used to do
this (see Figure 12).
Horizontal sections of vent must be supported every 5 ft
with a vent support or plumber’s strap. (See Figure 13)
F. Disassemble Vent Sections
To disassemble any two pieces of pipe, rotate either
section (Figure 14), so that the seams on both pipe sec-
tions are aligned (Figure 15). They can then be carefully
pulled apart.
Figure 15 Align and Disassemble Vent Sections
WARNING! Risk of Fire/Explosion/Asphyxiation! Im-
proper support may allow vent to sag and separate. Use
vent run supports and connect vent sections per installa-
tion instructions. DO NOT allow vent to sag below connec-
tion point to appliance.
Figure 12 Securing Vertical Pipe Sections
Figure 13 Securing Horizontal Pipe Sections
Figure 14 Rotate Seams for Disassembly

Hearth & Home Technologies • DVP Venting System • 4033-215 Rev E • 11/20/17
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G. Install the Heat Shield and Horizontal Ter-
mination Cap
Heat Shield Requirements for Horizontal Termination
For all horizontally terminated appliances, a heat shield
MUST be placed 1 in. above the top of the vent between
the wall shield restop and the base of the termination cap.
There are two sections of the heat shield. One section is
factory-attached to the wall shield restop. The other sec-
tion is factory-attached to the cap.
WARNING! Risk of Fire! TO PREVENT overheating and
re, heat shields must extend through the entire wall
thickness. Heat shields must overlap 1-1/2 in. (38 mm)
minimum.
If the wall thickness does not allow the required 1-1/2 in.
(38 mm) heat shield overlap when installed, an extended
heat shield must be used.
If the wall thickness is less than 4-3/8 in./111 mm, the heat
shields on the cap and wall shield restop will need to be
trimmed. A minimum 1-1/2 overlap MUST be maintained.
NOTICE: Heat shields may notbeeldconstructed.
The extended heat shield may need to be cut to length.
You will attach the cut heat shield to the existing cap heat
shield or wall shield restop heat shield using the supplied
screws.
You MUST maintain a 1-1/2 in. (38 mm) overlap of the
extended heat shield and the existing shields (both ends of
the heat shield). The small leg on the extended heat shield
should rest on the top of the vent (pipe section) to properly
space it from the pipe section.
Note: For horizontal vent runs through a combustible wall
and framing dimensions, refer to appliance installation
manual.
WARNING! Risk of Fire! Thetelescopinguesectionof
the termination cap MUST be used when connecting vent.
• 1-1/2 (38 mm) minimum overlap of vent and telescoping
uesectionisrequired.
Failuretomaintainoverlapmaycauseoverheatingandre.
Install the Horizontal Termination Cap
Attach slip section of cap to last vent section. Maintain
1-1/2 in. overlap between slip and vent sections.
Secure termination cap to exterior wall using provided
holes and fasteners.
Vent termination must not be recessed in the wall. Siding
may be brought to the edge of the cap base.
Flash and seal as appropriate for siding material at outside
edges of cap.
When installing a horizontal termination cap, follow
the cap location guidelines as prescribed by current
ANSI Z223.1 and CAN/CGA-B149 installation codes.
Note: When using termination caps with a factory-supplied
heat shield attached, no additional wall shield restop is
required on the exterior side of a combustible wall.
CAUTION! Risk of Burns! Local codes may require
installation of a cap shield to prevent anything or anyone
from touching the hot cap.
Note: Where required, an exterior wall ashing is available.
When penetrating a brick wall, a brick extension kit is available
for framing the brick.
H.DivertRoofRun-o󰀨
HHT recommends, where excessive water run-o󰀨 is
possible, use of one of the three options shown below
to prevent water running o󰀨 the roof and onto/into the
horizontal termination cap:
Install gutter
Install L-shaped
diverter
Install TRAP-VSS
(available from
your HHT dealer)
Figure16DivertRoofRun-o󰀨

Hearth & Home Technologies • DVP Venting System • 4033-215 Rev E • 11/20/17 7
Horizontal
overhang
12
X
20 in.
(508 mm)
Lowest
Discharge
Opening
Termination
Cap
Roof Pitch
is X / 12
Vertical
wall
H (min.) - Minimum height
from roof to lowest
discharge opening.
24 in. min.
(610 mm)
Roof Pitch H (Min.) Ft. Roof Pitch H (Min.) Ft.
Flat to 6/12 1.0* Over 11/12 to 12/12 4.0
Over 6/12 to 7/12 1.25* Over 12/12 to 14/12 5.0
Over 7/12 to 8/12 1.5* Over 14/12 to 16/12 6.0
Over 8/12 to 9/12 2.0* Over 16/12 to 18/12 7.0
Over 9/12 to 10/12 2.5 Over 18/12 to 20/12 7.5
Over 10/12 to 11/12 3.25 Over 20/12 to 21/12 8.0
* 3 ft. minimum in snow regions
Storm Collar
Roof
Flashing
Figure 17 Minimum Height from Roof to Lowest Discharge Open-
ing
Using a 300° F minimum noncombustilbe caulk, caulk the
gap between the roof ashing and the outside diameter of
the pipe. Caulk all seams and (see gure 18) the perimeter
of the ashing where it contacts the roof surface.
I. Install Roof Flashing
To install roof ashing see Figures 18 and 19. For installa-
tion of vertical termination cap see minimum vent heights
for various pitched roofs (see Figure 17) .
J. Assemble and Install Storm Collar
• Slide the storm collar onto the exposed pipe section and
align brackets.
• Insert a bolt (provided) through the brackets and install
nut (do not completely tighten).
Caulk
Pipe
Flashing
Caulk
Figure 18 Caulk the Cap
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• Slide the assembled storm collar down the pipe section
until it rests on the roof ashing.
• Tighten nut and make sure the collar is tight against the
pipe section.
• Caulk around the top of the storm collar.
Figure 19 Insert Bolt into Brackets

Hearth & Home Technologies • DVP Venting System • 4033-215 Rev E • 11/20/17
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K. Install Vertical Termination Cap
To attach the vertical termination cap, slide the inner collar
of the cap into the inner ue of the vent section and place
the outer collar of the cap over the outer ue of the vent
section.
Secure the cap by driving the three self-tapping screws
(supplied) through the pilot holes or dimples in the outer
collar of the cap into the outer ue of the vent.
Figure 20 Secure with Screws
Termination Cap
(1 of 3)
Storm
Collar
Caulk
At seam of collar halves
Screws
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