Monessen Hearth 3000 SERIES User manual

3000 SERIES
DIRECT VENT GAS FIREPLACE
INSTALLATION AND OPERATING INSTRUCTIONS
DUE TO HIGH TEMPERATURES, THE
APPLIANCE SHOULD BE LOCATED OUT OF
TRAFFIC AND AWAY FROM FURNITURE
AND DRAPERIES.
CHILDREN AND ADULTS SHOULD BE
ALERTED TO THE HAZARDS OF HIGH
SURFACE TEMPERATURE AND SHOULD
STAY AWAY TO AVOID BURNS OR
CLOTHING IGNITION.
YOUNG CHILDERN SHOULD BE
SUPERVISED WHEN THEY ARE IN THE
SAME ROOM AS THE APPLIANCE.
CLOTHING OR OTHER FLAMMABLE
MATERIAL SHOULD NOT BE PLACED ON
OR NEAR THE APPLIANCE.
KEEP THE ROOM AREA CLEAR AND FREE
FROM COMBUSTIBLE MATERIALS,
GASOLINE, AND OTHER FLAMMABLE
VAPORS AND LIQUIDS.
••
READ BEFORE INSTALLING OR OPERATING AND SAVE THESE INSTRUCTIONS
••
WARNING
If the information in these instructions are not
followed exactly, a fire or explosion may result
causing property damage, personal injury or loss of
life.
•Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electrical switch.
•Do not use any phone in your building.
•Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
•If you cannot reach your gas supplier, call the fire
department.
•Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
This appliance may be installed in an aftermarket,
permanently located, manufactured (mobile home,
where not prohibited by local codes.
This appliance is only for use with the type of gas
indicated on the rating plate. This appliance is not
convertible for use with other gases, unless a certified
kit is used.
For Residential Use-Meets All HUD Requirements For
Manufactured Housing Installations

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TA AB BL LE E O OF F C CO ON NT TE EN NT TS S
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IMPORTANT SAFETY INFORMATION: ................................................................................................................ 2
PRODUCT SPECIFICATIONS: .................................................................................................................................. 3
HIGH ALTITUDE INSTALLATIONS...................................................................................................................................3
LISTING & CODE APPROVAL: ................................................................................................................................ 3
PRE-INSTALLATION INFORMATION:.................................................................................................................. 4
BEFORE YOU START:.....................................................................................................................................................4
FIREPLACE LOCATION:...................................................................................................................................................4
WALL AND CEILING CLEARANCE REQUIREMENTS:......................................................................................................6
COMBUSTIBLE CLEARANCES:........................................................................................................................................6
MANTEL CLEARANCES:.................................................................................................................................................7
FLOOR CLEARANCES:....................................................................................................................................................7
MINIMUM VENT CLEARANCES TO COMBUSTIBLE MATERIALS:...................................................................................7
FRAMING DIMENSIONS:.................................................................................................................................................8
FINISHING MATERIAL:...................................................................................................................................................9
VENT INSTALLATION:............................................................................................................................................. 10
POSITIONING THE FIREPLACE:.....................................................................................................................................10
VENTING CONFIGURATION:.........................................................................................................................................10
INSTALLING VENT COMPONENTS .....................................................................................................................12
BEFORE YOU START:...................................................................................................................................................12
PIPING INSTALLATIONS:...............................................................................................................................................12
VENT TERMINATION:...................................................................................................................................................15
GAS LINE AND ELECTRICAL................................................................................................................................ 19
GAS LINE INSTALLATION:............................................................................................................................................19
ELECTRICAL WIRING:..................................................................................................................................................20
FINAL INSTALLATION............................................................................................................................................. 26
WALL FINISHING:.........................................................................................................................................................26
FINISHING THE FIREPLACE FLUSH WITH A WALL:........................................................................................................26
INSTALLATION COMPONENTS ON FIREPLACE:............................................................................................................26
GLASS REMOVAL:........................................................................................................................................................27
ROCK WOOL PLACEMENT:............................................................................................................................................28
LOG PLACEMENT:.........................................................................................................................................................29
OPERATING INSTRUCTIONS................................................................................................................................. 30
BEFORE LIGHTING THE FIREPLACE:.............................................................................................................................30
DURING LIGHTING THE FIREPLACE:............................................................................................................................30
MAINTENANCE..........................................................................................................................................................33
BURNER &CONTROL COMPARTMENT:.......................................................................................................................33
PILOT FLAME:..............................................................................................................................................................33
BURNER FLAME:..........................................................................................................................................................33
VENT SYSTEM:.............................................................................................................................................................34
GLASS DOOR:...............................................................................................................................................................34
LOGS.............................................................................................................................................................................34
PARTS LIST / ILLUSTRATION ............................................................................................................................... 35
TROUBLESHOOTING ...............................................................................................................................................38
STANDING PILOT IGNITION:.........................................................................................................................................38
ELECTRONIC PILOT IGNITION:.....................................................................................................................................40

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IMPORTANT SAFETY INFORMATION:
INSTALLER: Please leave these instructions with the owner.
OWNER: Please read and retains these instructions for future reference.
IMPORTANT: Read these instructions carefully before installing or trying to operate this appliance.
•DO NOT use this appliance if any part has been under water. Immediately call a qualified service technician to
inspect the appliance and to replace anypart of the control system and any gas control, which has been under
water.
•The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa).
•The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve
during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.5
kPa).
•Installation and repair should be done by a qualified service person.
•This appliance MUST BE installed on a metal or wood plate extending the full width and depth of the unit if
the unit is to be installed on carpet, vinyl tile or any combustible other than wood.
•CARBON MONOXIDE POISONING: Early signs of carbon monoxide poisoning are similar to the flu with
headaches, dizziness and/or nausea. If you have these signs, obtain fresh air immediately. Have the appliance
serviced, as it may not be operating properly.
•To prevent malfunction and/or sooting, this appliance should be inspected before use and at least annually by a
professional service person. More frequent cleaning may be required due to excessive lint from carpeting,
bedding materials, etc. It is imperative that control compartments, burners and circulating air passageways of
the appliance be kept clean. Refer to MAINTENANCE section found in this manual.
•This gas fireplace is a vented gas appliance. DO NOT burn wood or other material in this appliance.
•This appliance and vent assembly MUST be vented directly to the outside. This appliance MUST NEVER be
connected to a chimney flue(s) servicing a separate solid-fuel burning appliance or any other appliances.
•This appliance MUST use one of the vent systems described in the venting system of this manual. NO other
vent systems or components may be used.
•Venting terminals MUST NOT be recessed into a wall or siding
•Inspect the external vent cap on a regular basis to make sure that no debris is interfering with the airflow.
•Provide adequate clearances around air openings and adequate accessibility clearance for servicing and
operation. NEVER obstruct front opening of the appliance.
•DO NOT OPERATE the appliance with the glass door removed, cracked, or broken. Replacement of the glass
door should be done by a licensed or qualified person. DO NOT strike or slam the door. The glass door
assembly should only be replaced as a complete unit supplied by manufacturer. NO substitute materials should
be used.
•DO NOT use abrasive cleaners on the glass door assembly. Do not clean glass door when it is hot.
•Any safety screen or guard (i.e. glass door) removed for servicing an appliance should be replaced prior to
operating the appliance.
•The installation must conform with local codes, or in the absence of local codes, with the National Fuel Gas
Code, ANSI Z223.1 (in the United States) or with the current installation code CAN/CGA -B149 (in Canada).
•This unit complies with ANSI Z21.88-98, CGA 2.32-98.
•During manufacturing, fabricating, and shipping, various components of this appliance are treated with certain
oils, film, or bonding agents. These chemicals are not harmful but may produce annoying smoke and smells as
they are burned off during the initial operation of the appliance; possibly causing headaches or eye and lung
irritation. This is a normal and temporary occurrence. The initial break-in operation should last 2-3 hours with
the burner at the highest setting. Provide maximum ventilation by opening windows and doors to allow odors to
dissipate with continued use.

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PRODUCT SPECIFICATIONS:
Gas Pressure (Inches W.C.)
Models Number Gas Type Control Type Max Btu Max Min Manifold
320DV4136NV Natural Gas Milli-volt 26000 10.5 4.0 3.5
320DV4136PV Propane/LPG Milli-volt 26000 13.0 11.0 10.0
320DV4742NV Natural Gas Milli-volt 28000 10.5 4.0 3.5
320DV4742PV Propane/LPG Milli-volt 28000 13.0 11.0 10.0
320DV4136NE Natural Gas Electronic Ign 26000 10.5 4.0 3.5
320DV4136PE Propane/LPG Electronic Ign 26000 13.0 11.0 10.0
320DV4742NE Natural Gas Electronic Ign 28000 10.5 4.0 3.5
320DV4742PE Propane/LPG Electronic Ign 28000 13.0 11.0 10.0
High Altitude Installations
Gas rate shown above is for altitudes up to 2000 ft. When installing this fireplace at an elevation above 2000 ft, it
may be necessary to decrease the input rating by changing the existing burner orifice to a smaller size. Input should
be reduced four percent (4%) for each 1000 ft above sea level, unless the heating value of the gas has been reduced.
Consult your local dealer or gas authority for assistance in determining the proper orifice at your location.
LISTING & CODE APPROVAL:
The above models have been tested and certified by the applicable laboratories to the standards listed below.
MODEL LAB. TYPE CERTIFICATION STANDARD
320DV4136 Series CSA Vented Gas Fireplace Heaters ANSI Z21.88-1998•CSA 2.33-M98
320DV4742 Series CSA Vented Gas Fireplace Heaters ANSI Z21.88-1998•CSA 2.33-M98
In addition, this appliance may be installed in an aftermarket, permanently located, manufactured (mobile home,
where not prohibited by local codes. This appliance is only for use with the type of gas indicated on the rating plate.
This appliance is not convertible for use with other gases, unless a certified kit is used.

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PRE-INSTALLATION INFORMATION:
Before You Start:
Read this homeowner manual thoroughly and follow all instructions carefully. Inspect all contents for shipping
damage and immediately inform your dealer if any damage is found. Do not install any unit with damaged,
incomplete, or substitute parts.
Contents:
•Fireplace –Firebox and Burner system
•Fiber Ceramic Logs Set
•Canopy/Hood
•Lava Rock
•Rock Wool
•Restrictor Kit
•Deflector Shield (to be used with Horizontal Termination P/N 985)
Items Required For Installations:
Tools: Building Supplies:
Phillips Screwdriver Framing Materials
Hammer Wall Finishing Materials
Saw and / or saber saw Caulking Material (Noncombustible)
Level Fireplace Surround Material (Noncombustible)
Measuring Tape Piping Complying with Local Codes
Electric Drill and Bits Tee Joint
Pliers Pipe Sealant Approved for use with Propane/LPG
Square (Resistant to Sulfur Compounds)
Pipe Wrench
Fireplace Location:
Plan for the installation of your appliance. This includes determining where the unit is to be installed, the vent
configuration to be used, framing and finishing details, and whether any optional accessories (i.e. blower, wall
switch, or remote control) are desired. Consult your local building code agency to ensure compliance with local
codes, including permits and inspections.
The following factors should be taken into consideration:
•Clearance to side-wall, ceiling, woodwork, and windows. Minimum clearances to combustibles must be
maintained.
•This fireplace may be installed along a wall, across a corner, or use an exterior chase. Refer to Figure 2 for
suggested locations.
•Location should be out of high traffic areas and away from furniture and draperies due to heat from appliance.
•Never obstruct the front opening of the fireplace.
•Do not install in the vicinity where gasoline or other flammable liquids may be stored.
•Vent pipe routing. Refer to Venting section found in this manual for allowable venting configurations.
•These units can be installed in a bedroom. Refer to National Fuel Gas Code ANSII Z233.1/NFPA 54 -(current
edition), the Uniform Mechanical Code -(current edition), and Local Building Codes for specific installation
requirements.

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Figure 1: Fireplace Dimensions
2
Figure 2: Fireplace Locations and Minimum Clearances Requirements

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2” Min
2” Min
31” Min
Figure 3: Wall & Ceiling Minimum Clearances
Wall and Ceiling Clearance Requirements:
Ensure that minimum clearance shown in Figures 3 is maintained. Left and right clearances are determined when
facing the front of the appliance. Follow these instructions carefully to ensure safe installation. Failure to follow
these requirements may create a fire hazard.
Side-wall Clearance: The clearance from the front edge of the appliance to any combustible wall should not be
less than 2” on both the left and right side.
Ceiling Clearance: The ceiling must be at least 31” from the top of the front of the fireplace (65.5” from the
bottom of the appliance). Refer to Figure 3.
Back-wall Clearance: The appliance may be placed against a combustible back wall. NOTE: There are 1/4”
ribs/spacers on the outer shell of the unit to maintain minimum clearance of the outer shell to combustibles.
Combustible Clearances:
The appliance is a zero clearance fireplace with ribs/spacers defining the minimum space to the sheet metal outer
shell. Combustibles may be placed up against these spacers. Do NOT place combustibles (i.e., insulation, wood,
etc.) closer than allowed by the spacers or a fire hazard may exist. The ribs/spacers for the sides and rear of the
appliance are 1/4” and the top spacers are 3 1/4”. On the front top edge in front of the top framing spacers, a
combustible wall (or drywall) may be brought up to the top edge of the unit. Refer to Figure 4.

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Mantel Clearances:
A hood/canopy comes with every appliance. If a combustible mantel is installed, it must meet the clearance
requirements detailed in Figure 4.
Combustible wall or drywall to
top front edge of unit
Figure 4: Mantel Clearance
Floor Clearances:
The fireplace may be installed on a flat, hard combustible surface (i.e. flat wood, plywood, or particleboard). Be sure
that the fireplace rests on a solid continuous floor of platform with appropriate framing support. Do NOT install
appliance directly on carpeting, vinyl, or other soft floor covering. If the fireplace is to be installed on carpeting or
tile, or on any combustible material other than wood flooring, the fireplace should be installed on a metal or wood
panel that extends the full width and depth of the fireplace.
Minimum Vent Clearances to Combustible Materials:
The minimum clearances to combustibles for vent pipe require 3 inches at the top and 1 inch at the sides and bottom
for horizontal sections of the vent system. Refer to the figure below. For wall or ceiling firestops and vertical
sections of vent pipe a 1-inch minimum clearance all around the pipe must be maintained.
On some installation, if the distance between the first elbow and combustible material is three (3) inches, a heat
shield is required. This part can be obtained from Monessen or constructed out of steel material to maintain half-
inch (1/2”) air gap between the pipe and combustible material. The size of the part must be at least 12” wide by 12”
long. Refer to figure below.

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Figure 5: Combustible Clearances for Vent Pipe
Framing Dimensions:
Figure 6: Minimum Framing Dimensions
Firebox framing can be built before or after the appliance is set in place. Framing should be positioned to
accommodate wall covering and fireplace facing mantel. Figure 6 shows a typical framing of this appliance. Refer to
Figure 1 for firebox dimensions. All minimum clearances must be maintained in framing the appliance. The framing
headers may rest on the top of the framing spacers.
CAUTION
Measure fireplace dimensions and verify framing methods & wall covering details before framing
construction begins.
Shows Center of
10”X 10” Vent
Framing holes for
Horizontal Venting

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Finishing Material:
NOTE
Any remote wiring (i.e. remote control, wall switch, and optional fan) must be done prior to final finishing to
avoid costly reconstruction.
WARNING
Never obstruct or modify the air inlet or outlet grills (louvers) in any manner as it may create a fire hazard.
Only noncombustible materials (i.e. brick, tile, slate, steel, or other materials with a UL fire rating of Zero) may be
used to cover the black surface of the appliance. A 300°F minimum adhesive may be used to attach facing materials
to the black surface. If joints between the finished wall and the fireplace surround are sealed, a 300°F minimum
sealant material (General Electric RTV103 or equivalent) must be used. Refer to Figure 7.
Combustible
Material
High temperature sealant
permitted at these joints
Inlet/Outlet Grills (Louvers)
Do not cover/modify
Noncombustible materials only
are permitted to cover black face
of unit
Figure 7: Finishing Material

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VENT INSTALLATION:
Positioning The Fireplace:
NOTE
The fireplace must be installed giving full consideration to the clearance and height requirements identified
in this manual.
1. Bend out the six (6) nailing flanges located on the sides and top of the fireplace
2. Slide the firebox into prepared framing or position fireplace in its final position and frame later. Be sure
fireplace is rested on a flat surface.
3. Level the fireplace by checking the top of unit. Shim side-to-side and front-to-back as necessary.
4. Anchor nailing flanges of the fireplace to the side-framing members using 8d nails or other suitable fasteners.
Venting Configuration:
These models are approved to use Simpson-Duravent 4 X 6-5/8 Direct Vent Pipe Components and Monessen Hearth
System termination kits. No other venting systems or components may be used. See PARTS LIST /
ILLUSTRATIONS section for a list of approved vent components.
WARNING
Any common venting of this gas appliance with other gas appliances is not allowed. Do not connect this
appliance to a chimney flue servicing a separate solid fuel-burning appliance.
Venting Vertical Straight Up (No Elbow):
Figure 8: Vertical Venting -Straight Up
Dim Min Max
V6 feet 40 feet
NOTE
Air Restrictor Kit is recommended for vertical
runs of 10 feet or more to improve flame
appearance. This kit can be found in the
homeowner manual packet assembly.

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Horizontal Venting with One (1) Elbow:
Figure 9: Horizontal Venting with One (1) Elbow
Vertical Venting with Two (2) Elbows:
Figure 10: Vertical Venting with Two (2) Elbows
V, Vertical H, Horizontal
Elbow (5 inches) 30 inches Max
Elbow (5 inches) 30 inches Corner Max
1 foot Min 5 feet Max
2feet Min 10 feet Max
3 feet Min 15 feet Max
4 feet Min 20 feet Max
NOTE
If a 90°° Elbow is first attached to the unit, the
maximum horizontal run, H, is 30 inches
straight out, and 30 inches at a corner
installation.
V, Vertical H, Horizontal
1 foot Min 5 feet Max
2 feet Min 10 feet Max
3 feet Min 15 feet Max
4 feet Min 20 feet Max
NOTE
V1 dimension must satisfy this condition:
V + H + V1 << 40 feet.

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Horizontal Venting with Three (3) Elbows:
Figure 11: Horizontal Venting with Three (3) Elbows
INSTALLING VENT COMPONENTS
Before You Start:
Plan your installation. Set unit in place and survey how best to vent the unit. Select the appropriate pipe for the
installation. Read this manual and the manual with the termination cap thoroughly before installing unit or vent
system. After vent configuration has been decided, begin attaching pipe to unit.
Piping Installations:
1. Remove the cover plate on top of the fireplace using a Philips screwdriver.
2. Attached the first piece piping (elbow or straight pipe) to the pipe connector located inside the fireplace.
All vent pipes will lock into place by sliding the sections together. Nest the 4 indentations on the female
end of one pipe into the slots of the pipe connector and then twist the pipe together (Refer to the
instructions that comes with termination for more detailed explanation).
3. Continue to add vent components. Be certain that each section is locked properly.
4. Where necessary add support brackets. Refer to the figure below. Horizontal runs must be supported every
3 feet using wall straps (P/N 988). Vertical runs must be supported every 8 feet using wall straps (P/N
988). Slip wall straps loosely on to pipe. Attach straps to framing members using nails or screws. Tighten
nut/bolt to secure pipe.
V, Vertical H, Horizontal
1 foot Min 5 feet Max
2 feet Min 10 feet Max
3 feet Min 15 feet Max
4 feet Min 20 feet Max
NOTE
H1 and V1 dimension must satisfy these two
conditions:
H + H1 << 20 feet
V + H + V1 << 40 feet.

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NOTE
Two 45°° elbows (P/N 945) may be used in place of one 90°° elbow (P/N 990).
WARNING
Any horizontal run must have a 1/4” rise for every one (1) foot of run towards the vent termination. Never
allow the vent to run downward. This could cause high temperatures and may present a fire hazard.
Figure 12: Installing Pipe Supports
WARNING
Always maintain minimum clearances around vent systems. The minimum clearances to combustibles for
vent pipe require 3 inches at the top and 1 inch at the sides and bottom for horizontal sections of the vent
system. For wall or ceiling firestops and vertical sections of vent pipe a 1-inch minimum clearance all around
the pipe must be maintained. Do not pack the open air spaces with insulation or other materials. This could
cause high temperatures and may present a fire hazard.
5. A wall or ceiling firestop (P/N 963) MUST BE installed if the vent passes through a wall or ceiling.
For wall
•Cut a 10-inch X 10-inch hole through the interior or exterior wall. The center of the hole is the
centerline of the horizontal pipe. Refer to the figure below.
•Position the firestop on the hole previously cut and secure with screws or nails.
•Run vent through firestop.

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For Ceiling
•For ceiling firestops, position a plumb bob over the center of the vertical pipe; to spot a hole through
which the pipe will penetrate.
•Drill a hole through this centerpoint and check the floor for obstructions (i.e. wiring or plumbing).
•Reposition the fireplace and vent system, if necessary, to accommodate ceiling joists or obstructions.
•Cut a 10-inch by 10-inch hole through the ceiling, using the center point.
•Frame the hole with framing lumber the same size as the ceiling joists. Refer to the figure below.
Position firestop as shown in the figure below. If attic is above, mount firestop on top of framing. If
room is above, mount firestop on the bottom of framing. Secure with nails or screws.
•Run vent through firestop.
Figure 13: Wall Firestop Location
Figure 14: Ceiling Firestop Location

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Vent Termination:
For Vertical Termination
Figure 15: Minimum Vent Height for Various Roof Pitches
WARNING
Major building codes specify a minimum vent height above the rooftop depending on the pitch of the roof.
Refer to the above figure for minimum heights, provided the termination cap is at least eight (8) feet from a
vertical wall, and two (2) feet below a horizontal overhang. Trees, buildings, adjoining roof lines, & adverse
wind conditions may require taller chimneys than what is shown in the figure below.
NOTE
When working on the roof, cover the opening of the installed vent pipes below to prevent debris falling in.
WARNING
Always maintain minimum clearances around vent systems. For ceiling firestops and vertical sections of vent
pipe a 1-inch minimum clearance all around the pipe must be maintained. Do not pack the open air spaces
with insulation or other materials. This could cause high temperatures and may present a fire hazard.
To locate and install vertical termination
•Locate and mark the vent centerpoint on the underside of the roof, and drive a nail through the centerpoint.
•The size of the roof hole framing dimensions depends on the pitch of the roof
•Cut and frame the roof hole.
•Continue to install vent sections through the roof hole until reaching the appropriate distance above the roof.
•Attach a flashing (P/N 943) to the roof using nails, and use a non-hardening mastic around the edges of the
flashing base when it meets the roof.
•Attach a storm collar (P/N 953) over the flashing joint to form a watertight seal. Place non-hardening mastic
around the joint, between the storm collar and the vertical pipe.
•Slide the vertical termination cap (P/N 980) over the end of the pipe. At least 1 1/2” of overlap is required.
Screw the termination to the pipe with three (3) screws.

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For Horizontal Termination
Figure 16: Horizontal Vent Termination Location
#A=12 inches Clearance above the grade, a veranda, porch, deck, or balcony
#B=12 inches Clearance to window or door that may be opened.
C=12 inches Clearance to permanently closed window.
D*=18 inches Vertical clearance to ventilated soffit located above the terminal within a horizontal
distance of 2 feet from the centerline of the terminal.
E*=18 inches Clearance to unventilated soffits.
F=9 inches Clearance to an outside corner.
G=6 inches Clearance to an inside corner.
#H=3 feet Not to be installed above a gas meter/regulator assembly within 3 feet horizontally from
the centerline of the regulator.
#I=6 feet Clearance to service regulator vent outlet.
#J=12 inches Clearance to non-mechanical air supply inlet to building or the combustion air inlet to
any other appliance.
#K=6 feet Clearance to a mechanical air supply inlet
#L**=7 feet Clearance above a paved sidewalk paved driveway located on public property.
#M***=12 inches Clearance under veranda, porch, deck, or balcony.
#As specified in CGA B149 Installation Codes. Note: Local codes or regulations may
require different clearances.
*30” minimum for vinyl clad soffits
** A vent must not terminate directly above a sidewalk or paved driveway, which is
located between two single-family dwellings and serves both dwellings.
*** Only permitted if veranda, porch, deck, or balcony is fully open on a minimum of 2
sides beneath the floor.

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WARNING
Always maintain minimum clearances around vent systems. The minimum clearances to combustibles for
horizontal vent pipe are 3 inches at the top and 1 inch at the sides and bottom of the vent system. For wall
firestops, a 1-inch minimum clearance all around the pipe must be maintained. Do not pack the open air
spaces with insulation or other materials. This could cause high temperatures and may present a fire hazard.
Any horizontal run must have a 1/4” rise for every one (1) foot of run towards the vent termination. Never
allow the vent to run downward. This could cause high temperatures and may present a fire hazard.
WARNING
Termination cap must be positioned so that the embossed arrow is pointed up.
WARNING
Horizontal High Wind Termination Cap (P/N 985) or Horizontal Termination Cap (HTC) must be use for all
horizontal termination application to ensure proper operation of pilot and burner systems.
WARNING
A deflector shield MUST BE installed on termination cap. Failure to comply may cause heat damage or
sooting to wall.
To locate and install horizontal high wind termination cap (P/N 985)
•A deflector shield (P/N 37D0115) must be installed on horizontal high wind termination cap (P/N 985). The
deflector shield is included in the homeowner manual packet assembly. Failure to comply may cause heat
damage or sooting to wall. Attach the deflector shield to the using the two screws provided.
•If the house has vinyl siding, a vinyl siding standoff (P/N 950) must be used. Using the same cut-out hole on
the wall for wall firestop, align the vinyl siding with the hole, and then mark and cut the vinyl siding so that the
vinyl siding standoff can be mounted flush to the wall. Secure the standoff with galvanized, rustproof nails or
screws. Finish the edges of the siding with trim or “J channel” to prevent water from leaking into the building.
•Slide the horizontal high wind termination cap (P/N 985) over the end of the pipe. (Through the vinyl siding
standoff if installed) At least 1 1/2” of overlap is required. Screw the termination to the pipe with three (3)
screws.
•Attach the termination to the exterior wall or to the vinyl siding standoff (if installed) using four (4) screws
provided in the termination box.
Figure 17: Horizontal High Wind Termination (P/N 985) Installation on a Vinyl Siding Wall

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Figure 18 Horizontal Termination Cap on a Vinyl Siding Wall
To locate and install horizontal termination cap (P/N HTC)
•A wall firestop MUST BE installed if the vent passes through a wall or ceiling. Cut a 10-inch X 10-inch
hole through the interior or exterior wall. The center of the hole is the centerline of the horizontal pipe.
Position the firestop on the hole previously cut and secure with screws or nails (not provided). Run vent
through firestop.
•Attach and secure the termination to the last section of the adjustable pipe. The termination cap should
pass through the wall firestop from the exterior of the building. Make sure the termination cap is installed
following the arrow direction. The termination cap slides onto the last vent section with at least of 1-1/2”
overlap and is fastened with a minimum of three (3) #8 X 5/8” sheet metal screws. Drive these screws
through the outer pipe of the termination cap and through the outer pipe of the last vent pipe section.
•Attach the deflector shield to the termination cap with the two (2) #6 X 1/2” screws provided as shown in
Figure 18.
•If the house has vinyl siding, mark and cut the vinyl siding 12-1/4” X 12-1/4” square center around the pipe
so that the termination cap can be mounted flush to the wall. Finish the edges of the siding with trim or “J
channel” and caulking to prevent water from leaking into the building.
•Attach the termination cap to the exterior wall using four (4) #8 X 3” screws provided.
Vinyl Siding Wall
12-1/4” X 12-1/4”
Cutout on Vinyl
Termination Cap
Deflector Shield