Lennox Lmdv 3530Cnm Instruction Manual ManualsLib Makes It Easy To Find Manuals Online!

2014-12-11

: Lennox Lennox-Lmdv-3530Cnm-Instruction-Manual-120458 lennox-lmdv-3530cnm-instruction-manual-120458 lennox pdf

Open the PDF directly: View PDF .
Page Count: 36

Download
Open PDF In Browser	View PDF

INSTALLATION
INSTRUCTIONS
DIRECT VENT MERIT™
LMDV-33/35/40 SERIES
This appliance may be installed in an aftermarket
permanently located, manufactured home (USA
only) or 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.
In the Commonwealth of Massachusetts:

• Installation must be performed by a licensed plumber or

gas fitter;
• See Table of Contents for location of additional Commonwealth of Massachusetts requirements.

WARNING: IF THE INFORMATION IN THIS MANUAL
IS 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 or liquids in the vicinity of this or any
other appliance.
WHAT TO DO IF YOU SMELL GAS:
• Do not 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 your gas supplier's
instructions.
• If your gas supplier cannot be reached, call
the fire department.
Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.

OTL Report No. 116-F-31-5

A French manual is available upon request. Order P/N 850,029CF
Ce manuel d’installation est disponible en francais, simplement en
faire la demande. Numéro de la pièce 850,029CF.

VENTED GAS FIREPLACE HEATERS - DIRECT VENT MODELS
P/N 850,029M REV. G 05/2008

MODELS
Millivolt Models
LMDVT-3328-CNM
LMDVT-3328-CPM
LMDVR-3328-CNM
LMDVR-3328-CPM

LMDV-3530-CNM
LMDV-3530-CPM
LMDV-4035-CNM
LMDV-4035-CPM

Electronic Models
LMDVT-3328-CNE
LMDVR-3328-CNE
LMDV-3530-CNE
LMDV-4035-CNE

INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.

AVERTISSEMENT: ASSUREZ-VOUS DE BIEN
SUIVRE LES INSTRUCTIONS DONNÉ DANS CETTE
NOTICE POUR RÉDUIRE AU MINIMUM LE RISQUE
D'INCENDIE OU POUR ÉVITER TOUT DOMMAGE
MATÉRIEL, TOUTE BLESSURE OU LA MORT.
POUR VOTRE SÉCURITÉ: Ne pas entreposer ni
utiliser d'essence ni d'autre vapeurs ou liquides
inflammables dans le voisinage de cet appareil ou
de tout autre appareil.
POUR VOTRE SÉCURITÉ: Que faire si vous sentez
une odeur de gaz:
• Ne pas tenter d'allumer d'appareil.
• Ne touchez à aucun interrupteur. Ne pas vous
servir des téléphones se trouvant dans le batiment où vous vous trouvez.
• Evacuez la piéce, le bâtiment ou la zone.
• Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions du
fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de
gaz, appelez le service dos incendies.
L'installation et service doit être exécuté par un
qualifié installeur, agence de service ou le fournisseur de gaz.

TABLE OF CONTENTS

PACKAGING

Packaging..........................................Page 2
Introduction.......................................Page 2
General Information...........................Page 2
New York City Approval......................Page 3
Requirements for the
Commonwealth of Massachusetts..Page 4
Cold Climate Insulation......................Page 4
Location.............................................Page 4
Manufactured Home Requirements...Page 5
Vent Termination Clearances . ...........Page 5
Appliance and Vent Clearances..........Page 7
Detailed Installation Steps..................Page 8
Typical Installation Sequence ............Page 8
Step 1. Framing..................................Page 8
Step 2. Routing Gas Line...................Page 8
Fireplace Specifications......................Page 9
Step 3. Install the Venting System.....Page 11
Vertical Termination Systems.............Page 12
Vent Section Length Chart.................Page 12
Vertical Vent Tables and Figures.........Page 14
Horizontal Termination System..........Page 16
Horizontal Vent Tables and Figures....Page 19
Venting Using Flexible Vent Pipe........Page 22
Step 4. Field Wiring..........................Page 23
Step 5. Optional Blower Kit Wiring...Page 23
Step 6. Connecting Gas Line............Page 24
Step 7. Checking Unit Operation......Page 25
Step 8. Installing Logs ....................Page 26
Step 9. Installing Glass Door . .........Page 29
Step 10. Burner Adjustments.............Page 29
Step 11. Hood Installation..................Page 30
Finishing Requirements.....................Page 30
Installation Accessories.....................Page 31
Gas Conversion Kits................... Page 34

The assembled vented gas fireplace heater is
packaged with:
1 - One log set located in firebox area.
2 - One envelope containing the literature package which consists of the homeowner's
manual, installation instructions, and warranty; envelope is located in the control
compartment.
3 - One vent restrictor to be applied as shown on
Page 11 ; restrictor is taped to the envelope.
4 - One hood located behind the top panel.
5 - One bag of decorative volcanic stone located
in the control compartment.
6 - One bag of glowing embers located in the
control compartment.
7 - One bag of vermiculite located in the control
compartment.

This manual is part of a set of two supporting
this product. Refer to manual 875,028M for
Care & Operation information.

Please read and understand these
instructions before beginning your
installation.
The Millivolt appliances have a millivolt gas
control valve with piezo ignition system which
provides safe, efficient operation. If any optional
accessories that will require electrical power
are to be installed, the electrical power must be
provided at the time of appliance installation.
The Electronic appliances have an electronic
intermittent pilot ignition system which provides
safe, efficient operation. External electrical power is required to operate these appliances.

Introduction
These vented gas fireplace heaters are sealed
combustion, air circulating gas fireplaces designed for residential applications.
Approved Vent Components - These fireplaces
are designed, tested and listed for operation
and installation with, the following vent components only:
• Secure Vent™ Direct Vent System Components,
• Secure Flex™ Flexible Vent Components
manufactured by Security Chimneys International and
• Z-FLEX™ Model GA Venting Systems listed
to UL1777 and ULCS635 manufactured by
Flexmaster Canada Limited.
These approved vent system components are
labeled for identification. DO NOT use any other
manufacturer’s vent components with these
appliances. Use only the correct size venting
(4-1/2" inner & 7-1/2" outer).
These appliances comply with National Safety
Standards and are tested and listed by OMNITest Laboratories, Inc. (Report No. 116-F-31-5)
to ANSI Z21.88b (in Canada, CSA-2.33b), and
CAN/CGA-2.17-M91 in both USA and Canada,
as vented gas fireplace heaters.
Both millivolt and electronic versions of
these appliances are listed by OMNI-Test
Laboratories for installation in bedrooms
and Manufactured Homes.
Manufactured Homes See Manufactured Home Requirements on
Page 5 for additional information.

WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause injury
or property damage. Refer to
this manual. For assistance or
additional information consult
a qualified installer, service
agency
or the gas supplier.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

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.
Cet appareil doit être utilisé uniquement
avec les types de gaz indiqués sur la plaque
signalétique. Ne pas l'utiliser avec d'autres
gaz sauf si un kit de conversion certifié est
installé.
Misc. Codes / Standards Installation must conform to local codes. In the
absence of local codes, installation must comply
with the current National Fuel Gas Code, ANSI
Z223.1. (In Canada, the current CAN-1 B149
installation code).
The appliance, when installed, must be electrically grounded & wired in accordance with
local codes or, in the absence of local codes,
with the National Electrical Code, ANSI / NFPA
70-latest edition, or the Canadian Electrical
Code, CSA C22.1 - latest edition.

General Information
Note: Installation and repair should be performed by a qualified service person. The
appliance should be inspected annually by a
qualified professional service technician. More
frequent inspections and cleanings may be
required due to excessive lint from carpeting,
bedding material, etc.
S'assurer que le brùleur et le compartiment des
commandes sont propres. Voir les instructions
d'installation et d'utilisation qui accompagnent
l'appareil.
Provide adequate clearances around air openings and adequate accessibility clearance for
service and proper operation. Never obstruct
the front openings of the appliance.
These appliances are designed to operate on
natural or propane gas only. The use of other
fuels or combination of fuels will degrade
the performance of this system and may be
dangerous.
These fireplaces are designed as supplemental heaters. Therefore, it is advisable to have
an alternate heat source when installed in a
dwelling.
Millivolt Models - The millivolt appliances are
manually controlled and feature a spark igniter
(piezo) that allows the appliance's pilot gas to
be lit without the use of matches or batteries.
This system provides continued service in the
event of a power outage.
Millivolt models come standard with a manually-modulated gas valve; flame appearance and
heat output can be controlled at the gas valve.
The BTU Input for these appliances is shown
in Tables 1 & 2.

20,000 high
15,200 low

LMDV-4035CPM

27,000 high
21,500 low

Table 2
Electronic Models Electronic models have a fixed rate gas valve.
Input of electronic models is shown in Table 3.
Electronic Models with Fixed Rate Gas Valve

LMDVT-3328
LMDVR-3328

17,500

LMDV-3530

20,000

LMDV-4035

27,000

Table 3
Gas Pressure - All Models

Tables 4, 5 and 6 show the appliances' gas
pressure requirements:

Table 6
Test gauge connections are provided on the
front of the millivolt gas control valve, identified IN for the inlet and OUT for the manifold
side. A 1/8" NPT Test gauge connection
is provided at the inlet and outlet side of
the electronic gas control valve.

These appliances must be isolated from the
gas supply piping system (by closing their
individual manual shut-off 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).
These appliances and their individual shut-off
valves must be disconnected from the gas
supply piping system during any pressure
testing of that system at pressures greater
than 1/2 psig (3.5 kPa).

OF F

Main Gas
Pilot Adjustment
Control Knob
Screw
OFF/PILOT/ON

Figure 1
Honeywell Millivolt Gas Valve
PIEZO
IGNITER

PILOT
ADJUSTMENT
SCREW

GAS CONTROL
KNOB

TP/TH

CONVERTIBLE
HI/LO REGULATOR
(adjusts flame height
and heat output)

TP
TH

Orifice Sizes - Sea Level to High Altitude
(All Models)
These appliances are tested and approved for
installation at elevations of 0-4500 feet (0-1372
meters) above sea level using the standard burner
orifice sizes (marked with an "*" in Table 7). For
elevations above 4500 feet, contact your gas
supplier or qualified service technician .
Burner Orifice Sizes
Elevation 0-4500 feet ( 0-1372 meters)
Model

Nat.Gas

Figure 2

Honeywell Electronic Gas Valve
Manifold Pressure
Port

drill size (inches)

#45 (.082") *
39L66 •

(.048") *
99K780 •

Fuel #

Minimum

Maximum

Natural Gas

5.0" WC
(1.24 kPa)

10.5" WC
(2.61 kPa)

LMDV-3530

#44 (.086") *
60J8001 •

#55 (.052") *
19L5201 •

Propane

11.0" WC
(2.74 kPa)

13.0" WC
(3.23 kPa)

LMDV-4035

#37 (.104") *
24M1001 •

1/16" (.062")*
21L0101 •

* Standard size installed at factory
• Part /Cat. Number

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

OFF
ON

drill size (inches)

OUTLET
PRESSURE
TAP

INLET
PRESSURE
TAP

ON / OFF Switch
Inlet
Pressure
Port

IGNITER

Series

Table 7

WIRING
TERMINALS

Propane

LMDVT-3328
LMDVR-3328

Table 4

LO W

CONTROL

Inlet Gas Supply Pressure
(all models)

(Hi) 10.0" WC (2.49 kPa)

Input Rate
(BTU / HR)

Propane

Manifold Pressure Tap

Model Series

(Hi) 3.5" WC (.87 kPa)

Inlet Pressure Tap

Natural and Propane Gas

Natural Gas

HI/LO Variable
Flame Height
Adjustment

LMDV-3530CPM

Maximum Manifold Pressure

i
t

17,500 high
14,000 low

Fuel #

SIT Millivolt Gas Valve

P IL O T

LMDVT-3328CPM
LMDVR-3328CPM

Manifold Gas Supply Pressure
(electronic models)

See Figures 1 & 2 for Millivolt models and
Figure 3 For Electronic Models.

Input Rate (BTU / HR)

Table 5

Gas Valve Diagrams

Models

(Hi) 10.0" WC
(2.49 kPa)

TPTH

PROPANE GAS

Propane

(Lo) 6.3" WC
(1.57 kPa)

PSI

Input (BTU) Manually-Modulated Gas
Valves (millivolt models)

(Hi) 3.5" WC
(.87 kPa)

L OT OF F

Table 1

(Lo) 2.2" WC
(.55 kPa)

LMDV-4035CNM

27,000 high
18,500 low

Natural
Gas

LMDV-3530CNM

20,000 high
12,800 low

High

17,500 high
11,700 low

Low

PIL

LMDVT-3328CNM
LMDVR-3328CNM

Fuel #

Input Rate (BTU / HR)

Models

Install the appliance according to the regulations
of the local authorities having jurisdiction and,
in the USA, the National Fuel Gas Code NFPA 54
/ ANSI Z223.1 - latest edition or, in Canada, the
CAN1-B149.1 and .2 codes - latest edition.

OUT

NATURAL GAS

Manifold Gas Supply Pressure
(millivolt models)

Input (BTU) Manually-Modulated Gas
Valves (millivolt models)

Electronic
Gas
Control
Valve

Figure 3

TOP VENT
TOP VENT
APPLICATION APPLICATION

• Installation and repair must be done by a
plumber or gas fitter licensed in the Commonwealth of Massachusetts.
• The flexible gas line connector used shall not
exceed 36 inches (92 centimeters) in length.
• The individual manual shut-off must be a
T-handle type valve.

APPLICATION
TOP VENT

REAR VENT
TOP VENT
APPLICATION
APPLICATION

Massachusetts:
These fireplaces are approved for installation in
the US state of Massachusetts if the following
additional requirements are met-

NT
VE ION
AR AT
RE LIC
P
AP

These appliances are approved for installation
in the following USA locations listed in the
following:

AP TOP
PL V
IC EN
AT T
IO
N

Massachusetts And New York City, NY Requirements

RECESSED
INSTALLATION
TOP VENT
APPLICATION

Massachusetts Horizontal Vent Requirements
In the Commonwealth of Massachusetts, horizontal terminations installed less than seven
(7) feet above the finished grade must comply
with the following additional requirements:
• A hard wired carbon monoxide detector with
an alarm and battery back-up must be installed
on the floor level where the gas fireplace is
installed. The carbon monoxide detector must
comply with NFPA 720, be ANSI/UL 2034 listed
and be ISA certified.
• A metal or plastic identification plate must
be permanently mounted to the exterior of the
building at a minimum height of eight (8) feet
above grade and be directly in line with the
horizontal termination. The sign must read,
in print size no less than one-half (1/2) inch
in size, GAS VENT DIRECTLY BELOW. KEEP
CLEAR OF ALL OBSTRUCTIONS.
New York City, NY:
These fireplaces are approved for installation in
New York City in the US state of New York.

Cold Climate Insulation
For cold climate installations, seal all cracks
around the appliance with noncombustible
material and wherever cold air could enter
the room. It is especially important to insulate
outside chase cavity between studs and under
floor on which the appliance rests, if floor is
above ground level. Gas line holes and other
openings should be caulked or stuffed with
unfaced fiberglass insulation. If the fireplace
is being installed on a cement slab, in cold
climates, a sheet of plywood or other raised
platform can be placed underneath to prevent
conducting cold up into the room. It also helps to
sheetrock inside surfaces and tape for maximum
air tightness and caulk firestops.

VERTICAL VENT
(Rear Vent
Application)

HORIZONTAL VENT
(Rear Vent Application
without a chase)

HORIZONTAL VENT
(Rear Vent Application
With a chase)

HORIZONTAL VENT
(Top Vent
Application)

VERTICAL VENT
(Top Vent
Application)

Figure 4 - Typical Locations
Location
In selecting the location, the aesthetic and functional use of the appliance are primary concerns.
However, vent system routing to the exterior and
access to the fuel supply are also important.
Consideration should be given to traffic ways,
furniture, draperies, etc., due to elevated surface
temperatures (Figure 4). The location should
also be free of electrical, plumbing or other
heating/air conditioning ducting.
These direct vent appliances are uniquely
suited for installations requiring a utility shelf
positioned directly above the fireplace. Utility
shelves like these are commonly used for locating television sets and decorative plants. Be
aware that this is a heat producing appliance.
Objects placed above the unit are exposed to
elevated temperatures.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

To provide for the lowest possible shelf surface
use the alternate rear vent outlet with attached
venting routed in a way to minimize obstructions
to the use of the space above the appliance. Do
not insulate the space between the appliance
and the area above it. See Figure 9. The minimum height from the base of the appliance to
the underside of combustible materials used to
construct a utility shelf in this fashion is shown
in the Table in Figure 9.
The appliance should be mounted on a fully
supported base extending the full width and
depth of the unit. The appliance may be located
on or near conventional construction materials.
However, if installed on combustible materials,
such as carpeting, vinyl tile, etc., a metal or
wood barrier covering the entire bottom surface
must be used.

MANUFACTURED HOME
REQUIREMENTS
This appliance may be installed in an aftermarket permanently located, manufactured
home (USA only) or mobile home, where not
prohibited by local codes.
Cet appareil peut être installé dans un maison
préfabriquée (É.-U. seulement) ou mobile déjà
installée à demeure si les réglements locaux
le permettent.

Vertical Vent Termination Clearances
TERMINATION HEIGHTS FOR VENTS ABOVE
FLAT OR SLOPED ROOFS
Horizontal Overhang
2 FT
MIN.

2 FT MIN.

Lowest
Discharge
Opening

Vent
Termination
Storm Collar

H*
X
12

Flashing

Manufactured Home installations must be
installed in accordance with these instructions
and the following standards / codes:
• Manufactured Home Construction and
Safety Standard Title 24 CFR, Part 3280, or
the current Standard for Fire Safety Criteria
for Manufactured Home Installations, Sites
and Communities ANSI / NFPA 501A in the
USA, and CAN / CSA Z240 MH Mobile Home
Standard in Canada
• (when applicable) The American National
Standard for Manufactured Homes (NCSBCS
/ ANSI A225.1 - latest edition).

Roof Pitch is X/12
1 inch (25.4 mm) Minimum
Clearance to Combustibles

Concentric
Vent Pipe

This appliance must be grounded
to the chassis of the manufactured home in accordance with
local codes or in the absence of
local codes, with the National
Electrical Code ANSI / NFPA 70
- latest edition or the Canadian
Electrical Code CSA C22.1 - latest
edition.
Vent Termination Clearances
These instructions should be used as a guideline and do not supersede local codes in any
way. Install vent according to local codes,
these instructions, the current National Fuel
Gas Code (ANSI-Z223.1) in the USA or the
current standards of CAN/CGA-B149.1 and
-B149.2 in Canada.

*H = MINIMUM HEIGHT FROM ROOF TO
LOWEST DISCHARGE OPENING OF VENT

The vent / air intake termination clearances
above the high side of an angled roof is as
shown in the following chart:

Roof Pitch

* Feet

* Meters

Flat to 6/12

1.0

0.3

6/12 to 7/12

1.25

0.38

7/12 to 8/12

1.5

0.46

8/12 to 9/12

2.0

0.61

9/12 to 10/12

2.5

0.76

10/12 to 11/12

3.25

0.99

11/12 to 12/12

4.0

1.22

12/12 to 14/12

5.0

1.52

14/12 to 16/12

6.0

1.83

16/12 to 18/12

7.0

2.13

18/12 to 20/12

7.5

2.29

20/12 to 21/12

8.0

2.44

Figure 5

Horizontal Vent Termination Clearances

CAUTIONS
Ensure that the cross members
are not cut or weakened during
installation. The structural integrity of the manufactured home
floor, wall, and ceiling / roof must
be maintained.

Vertical
Wall

Termination Heights For Vents
Above Flat Or Sloped Roofs
Ref. NFPA 54 / ANSI Z223.1, 7.6

Combustible Projection
2-1/2 inches or less in length
Combustible Projection greater
than 2-1/2 inches in length
Ventilated
Soffit
Unventilated
Soffit
18"
(457 mm)

12"
(305 mm)

3"
(76 mm)

All horizontal terminations
may be located as close as
6” (152mm) to any
(non-combustible and
combustible) exterior
sidewall. This distance
may be decreased to 2”
(51mm) for non-combustible exterior
sidewalls only, if the
SV4.5HT-2 termination
is used.

Termination Kit

Side Elevation View
Termination Kit

Figure 6

Note - See Figure 35 on Page 20 for the exterior wall recess
allowances of the square horizontal termination.

Horizontal Vent Termination Clearances
The horizontal vent termination must have a minimum of 3" (76 mm) clearance to any overhead
combustible projection of 2 1/2" (64 mm) or less. See Figure 6. For projections exceeding 2 1/2"
(64 mm), see Figure 6. For additional vent location restrictions refer to Figure 7 on Page 8.

Terminate multiple vent terminations according to
the installation codes listed above.
Terminate single vent caps relative to building
components according to Figure 5.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Exterior HORIZONTAL Vent TERMINATION Clearance Requirements
NOTE: Local Codes Or Regulations
May Require Different Clearances.

* See Item D in the Text Below.
Center Line
of Termination

Exterior Wall
*18”
Horizontal
Termination

N
O

G
18”

NOTE: Location Of The Vent Termination
Must Not Interfere With Access To The
Electrical Service.

Inside
Corner Detail

Ventilated Soffit

Inside Corner

in U.S.
A == 9”
12” in Canada

Detail D

H
3 ft.
B
L

A
V

Fixed
Closed
Window

Operable
Window

D
A

3 ft.
J

A
X = Air Supply Inlet

V = Vent Terminal

= Area where Terminal is not Permitted

Canadian Installation*

US Installation**

A = Clearance above grade, veranda, porch, deck, or balcony.

12 inches (30cm)*

12 inches (30cm)**

B = Clearance to window or door that may be opened.

6 inches (15cm) for appliances
< 10,000 Btuh (3kW), 12 inches (30cm)
for appliances > 10,000 Btuh (3kW)

6 inches (15cm) for appliances
< 10,000 Btuh (3kW), 9 inches (23cm)
for appliances > 10,000 Btuh (3kW) and
< 50,000 Btuh (15kW), 12 inches (30cm)
for appliances > 50,000 Btuh (15kW)**

C = Clearance to permanently closed window

12 inches (305mm) recommended to
prevent window condensation
18 inches (458mm)

9 inches (229mm) recommended to
prevent window condensation
18 inches (458mm)

D = Vertical clearance to ventilated soffit located above the
terminal within a horizontal distance of 18 inches (458mm)
from the center line of the terminal
E = Clearance to unventilated soffit***
F = Clearance to outside corner

12 inches (305mm)

5 inches (12.7cm) minimum

G = Clearance to inside corner

6 inches (15.2cm) minimum

H = Clearance to each inside of center line extended above
meter/regulator assembly
I = Clearance to service regulator vent outlet

3 feet (91cm) within a height of 15 feet
above the meter/regulator assembly*
3 feet (91cm)*

3 feet (91cm) within a height of 15 feet
above the meter/regulator assembly**
3 feet (91cm)**

J = Clearance to nonmechanical air supply inlet to building or
the combustion air inlet to any other appliance

6 inches (15cm) for appliances
< 10,000 Btuh (3kW), 12 inches (30cm)
for appliances > 10,000 Btuh (3kW)

K = Clearance to a mechanical air supply inlet

6 feet (1.83m)*

L = Clearance above paved sidewalk or paved diveway located
on public property
M = Clearance under veranda, porch, deck or balcony

7 feet (2.13m)‡

6 inches (15cm) for appliances
< 10,000 Btuh (3kW), 9 inches (23cm)
for appliances > 10,000 Btuh (3kW) and
< 50,000 Btuh (15kW), 12 inches (30cm)
for appliances > 50,000 Btuh (15kW)**
3 feet (91cm) above if within 10 feet
(3m) horizontally**
7 feet (2.13m)‡

12 inches (30cm)*‡

12 inches (30cm)‡

N = Depth of Alcove (Maximum)

6 feet (1.83m)*

6 feet (1.83m)**

O = Clearance to Termination (Alcove)

6 inches (15.2mm)*

6 inches (15.2mm)**

P = Width of Alcove (Minimum)

3 feet (91cm)*

Q = Clearance to Combustible Above (Alcove)

18 inches (457mm)*

18 inches (457mm)**

* In accordance with the current CSA-B149.1 National Gas And Propane Installation Code.
** In accordance with the curent ANSI SZ223.1/NFPA 54 National Fuel Gas Codes.
*** Clearance required to vinyl soffit material - 30 inches (76cm) minimum.
‡ A vent shall 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 2 sides beneath the floor:

Figure 7
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Minimum Clearances to Combustibles
Hearth Extension A hearth extension is not required with this appliance. If a hearth extension is
used, do not block the lower control compartment door. Any hearth extension used is for appearance
only and does not have to conform to standard hearth extension installation requirements.
Wall Finishes / Surrounds / Mantels
Note: Combustible wall finish materials and/or surround materials must not be allowed to encroach
the area defined by the appliance front face (black sheet metal). Never allow combustible materials
to be positioned in front of or overlapping the appliance front face. See Figure 61 on Page 30.
Non-combustible materials, such as surrounds and other appliance trim, may be installed on the
appliance front face with these exceptions: they must not cover any portion of the removable glass
panel or louvers.
Vertical installation clearances to combustible mantels vary according to the depth of the mantel.
See Figure 8. Mantels constructed of non-combustible materials may be installed at any height
above the appliance opening; however, do not allow anything to hang below the hood.

Appliance and Vent Clearances
The appliance is approved with zero clearance to
combustible materials on all sides (as detailed in
Table 8), with the following exception: When the
unit is installed with one side flush with a wall, the
wall on the other side of the unit must not extend
beyond the front edge of the unit. In addition, when
the unit is recessed, the side walls surrounding
the unit must not extend beyond the front edge
of the unit. See Figure 4.
MINIMUM CLEARANCES Inches (millimeters)
Back

1/2 (13)
0 (0) Spacers

Sides

1/2 (13)
0 (0) Spacers

14 (356)

Top Spacers

0 (0)

12 (305)

Floor

0 (0)

Bottom of Appliance
To Ceiling

64 (1626)

Mantel Depth

inches (millimeters)

10 (254)
8 (203)

Vent

Top of
Appliance

6 (152)

SERVICE CLEARANCES Feet (meters)

4 (102)

Front
12

*Note: 3 in. (75 mm) above any horizontal/inclined vent component.

Note - Hood shown as positioned with louvered panels.

**Note: See Page 8, Step 1 for clearance
requirements to the nailing flange located
at each side of the unit and any screw heads
adjacent to it.

Figure 8 - Minimum Mantel Clearances

Combustible Shelf Height - Inches (millimeters)
Top Vent - with One 90 Degree Elbow
Secure Vent

Secure Flex
(flex elbow)

3 ft. (0.9 m)

Table 8

(305) (254) (203) (152) (102) (51)

Model No.

3 (76) Top *
1 (25.4) Sides & Bottom

Minimum Distance to Unprotected Side Wall

Rear Vent - Straight Out the Back
Secure Vent

Secure Flex

LMDVT-3328

*44-1/2 (1130)

*46-1/4 (1175)

N/A

LMDVR-3328

N/A

33-1/4 (845)

LMDV-3530

*46-1/2 (1181)

*48-1/4 (1226)

35-1/4 (895)

LMDV-4035

*51-1/2 (1308)

*53-1/4 (1349)

40-1/4 (1022)

Combustible materials may project beyond the sides of the fireplace opening as long as they are kept within the shaded areas
illustrated here.
At 14" minimum
side wall clearance,
a combustible wall
can project to any
length.

At 8-1/4" side
wall clearance, a
combustible wall
can project 12"

Top View of
Fireplace

* Includes 3” clearance to combustibles (required above vent components)

Do not insulate the
space between the
appliance and the
area above it.

Shelf Height
(see table)

45o

Do not insulate the
space between the
appliance and the
area above it.

Combustible Materials
Allowed In Shaded Area
“Safe Zone”
5 (127) Combustible Walls

shown in dark gray

When the unit is
installed with one side
flush with a wall, the
12 (305)
wall on the other side
of the unit must not
extend beyond the front
edge of the unit.

*Shelf Height
(see table)

19 (483)

Shelf Above Fireplace With Rear Venting

Shelf Above Fireplace With Top Venting

Figure 9 - Shelf Height Minimum Clearances

14
(356)

8-1/4
(209)

Inches (millimeters)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Protected wall shown in white

Figure 10

Detailed Installation Steps
The appliance is shipped with all gas controls and
components installed and pre-wired. Remove
the shipping carton, exposing the front glass
door. Remove the top and bottom louvered
control panel per instructions on Page 25 (see
Control Compartment Access / Louver Panel
Instructions). Remove the cardboard from
underneath the pressure relief plates (in area
behind top louver panel, See Figure 11). Open
the two latches (located under the firebox floor)
securing the glass door. Remove the door by
tilting it outward at the bottom and lifting it up.
Set the door aside protecting it from inadvertent
damage. See Figure 57 on Page 29.
Pressure Relief Plates

REMOVE

CARDBOARD
BEFORE USING

REMOVE

Step 3. (Page 11) Install the vent system and
exterior termination.
Step 4. (Page 23) Field Wiring
a. Millivolt Appliances – Install the operating
control switch (not factory provided) and
bring in electrical service line for forced air
circulating blower (optional equipment).
b. Electronic Appliances – Field wire and
install operating control switch.
Step 5. (Page 23) Install blower kit (optional
equipment).
Step 6. (Page 24) Make connection to gas
supply.
Step 7. (Page 25) Install the logs, decorative
volcanic stone and glowing embers.
Step 8. (Page 26) Checkout appliance operation.
Step 9. (Page 29) Install glass door frame
assembly.
Step 10. (Page 29) Adjust burner to ensure
proper flame appearance.
Step 11. (Page 30) Install the hoods.

CARDBOARD
BEFORE USING

Step 1. Framing
Remove Cardboard Before
Using Appliance

Note: See-Through Model Shown

Figure 11
TYPICAL INSTALLATION SEQUENCE
The typical sequence of installation follows,
however, each installation is unique resulting
in variations to those described.
See the Page numbers references in the following steps for detailed procedures.
Step 1. (Page 8) Construct the appliance framing. Position the appliance within the framing
and secure with nailing brackets.
Step 2. (Page 8) Route gas supply line to appliance location.

Frame these appliances as illustrated in Figures
14 & 15 on Pages 9 & 10 (Figure 15 applies to
corner framing installations only). All framing
details must allow for a minimum clearance
to combustible framing members as shown in
Table 8 on Page 7.
If the appliance is to be elevated above floor
level, a solid continuous platform must be
constructed.
Headers may be in direct contact with the
appliance top spacers but must not be supported by them or notched to fit around them.
All construction above the appliance must be
self supporting. DO NOT use the appliance for
structural support.
The fireplace should be secured to the side
framing members using the unit's nailing
flanges - one top and bottom on each side of
the fireplace front. See Figure 12. Use 8d nails
or their equivalent.

Unit Nailing Flange
(No clearance to
combustible
framing is required)

Side
Framing

Left Side Front Corner of Fireplace Shown
(Right Side Requirements the Same)
Unit Being Secured By Its Nailing Flanges
To The Framing

Note: The nailing flanges, combustible members
and screw heads located in areas directly adjacent
to the nailing flanges, are EXEMPT from the 1/2”
clearance to combustible requirements for the
firebox outer wrapper. Combustible framing may be
in direct contact with the nailing flanges and may
be located closer than 1/2” from screw heads and
the firebox wrapper in areas adjacent to the nailing
flanges. Frame the opening to the exact dimensions
specified in the framing details of this manual.

Figure 12
Step 2. Routing Gas Line
Route a 1/2" (13 mm) gas line along the inside
of the right side framing as shown in Figure
13. Gas lines must be routed, constructed and
made of materials that are in strict accordance
with local codes and regulations. All appliances
are factory-equipped with a flexible gas line
connector and 1/2 inch shutoff valve. (See
Step 6 on Page 24 ).

Right Side Front
Corner of Fireplace Framing

6 1/2"
(152 mm)
Also see Figure 14.

Figure 13 - ROUTE GAS LINE
Continued on Page 10.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

3"
(76 mm)

fireplace specifications
Framing

**FRAMING WITH SQUARE HORIZONTAL TERMINATIONS (SV4.5HT-2)

Framing Dimensions
Model No.
LMDVT-3328
LMDVR-3328
LMDV-3530
LMDV-4035

in.

33-1/4

------

37-3/4

12-7/8

845

------

959

327

in.

33-1/4

19-5/8

------

12-7/8

845

498

------

327

in.

35-1/4

21-11/16

39-3/4

895

551

1010

406

in.

40-1/4

26-11/16

44-3/4

1022

678

1137

406

** Framing should be constructed
of 2x4 or larger lumber

VENT FRAMING TOP VENT WITH ONE
90ϒELBOW

10-1/2
(267)

VENT FRAMING REAR VENT WITH
NO ELBOWS
7

5-1/8
(130)

Propane

Steady
State

AFUE

Steady
State

AFUE

LMDVT-3328

LMDVR-3328

LMDV-3530

LMDV-4035

Vent Size
Co-axial DV
Vent Size

4-1/2" Inner
/ 7-1/2" Outer

(178)

12-1/8
(308)

E
1/2 A

A
Inches (mm)

Natural & Propane Gas

* The Steady State Efficiency numbers based on
maximum vent configuration.

5-1/8
(130)

Input (BTU) - MV & Electronic

Notes

Due to Lennox' ongoing commitment to quality, all
specifications, ratings and dimensions are subject
to change without notice.

12-1/8
(308)

Efficiencies %
Natural Gas
Models

(178)

Models

Input Rate (BTU / HR)

LMDVT-3328CPM
LMDVR-3328CPM

17,500

LMDV-3530CPM

20,000

LMDV-4035CPM

27,000

E is the required framing depth dimension when the
finish material (drywall) thickness is 1/2 in. (13mm).

Vertical Venting Through the Ceiling:
Frame ceiling opening - Use a plumb line
from the ceiling above the appliance to
locate center of the vertical run. Cut and/or
frame an opening, 10-1/2" x 10-1/2" (267
mm x 267 mm) inside dimensions, about
this center mark (see Figure 25).

FRAMING SPACERS (Top & Sides & Rear)
(Louvered Front Model Shown)

**See Note 1

*CONCENTRIC FLUE
FLUE - 4-1/2 (114)
COMBUSTION AIR - 7-1/2 (190)
* LMDV models have a top and rear vent
LMDVR models have only a rear vent
LMDVT models have only a top vent
J

**Note 1 - Collars protrude one inch on LMDVR-3328 model.

Top View
3 (76)

NOTE - Eyebrow
hood shown as positioned
in louvered front model.

1/2 (13)

ELECTRICAL INLET
2-3/4 x 2 (70 x 51)
COVER PLATE with
KNOCKOUT)

** See Note 1

GAS INLET
(Either Side
and bottom)

6 (152)

OPTIONAL ELECTRICAL
INLET KNOCKOUT,
REQUIRING A FIELD
PROVIDED JUNCTION BOX
(Either Side)

L
1-5/8
(42)

1-3/8 (35)

Right Side View

Front View
Model No.
LMDVT-3328
LMDVR-3328
LMDV-3530

Figure 14

LMDV-4035

in.

A
33 1/8

F**

B
30 1/8

C
17

D
27 1/2

E
33 1/8

**F
19 5/8

G
21 1/2

H
10 3/4

J
6 13/16

K
3

L
8 11/32

M
2 3/4

N
13

841

765

432

699

841

498

546

273

173

212

330

in.
mm
in.
mm

35 1/8
892
40 1/8
1019

32 1/8
816
37 1/ 8
943

19
483
24
610

29 1/2
749
34 1/2
876

35 1/8
892
40 1/8
1019

21 11/16
551
26 11/16
678

24 7/8
632
29 7/8
759

12 7/16
316
14 15/16
379

9
220
9
220

3
76
3
76

9
220
9
220

3
76
3
76

16
406
16
406

fireplace FRAMING specifications
NoteVenting requirments for rear vent applications in corner installations • The horizontal vent length "a" to "b" must not exceed 28 inches (711 mm).

b
F

LMDV and LMDVR units

LMDVT-3328 and LMDVR-3328 Models Dimension A to F occur when one 45 degree elbow is connected directly to the
appliance collar.

7 1/4 (184)

LMDV and LMDVT units

LMDVT-3530 and LMDVR-4035 Models Dimension D and F occur when one 45 degree elbow is connected directly to the
appliance collar.

Inches
(millimeters)

Model No.
LMDVT-3328

LMDVR-3328 mm
LMDV-3530
LMDV-4035

in. 33 1/8 48 1/2 34 5/16 17 3/16
841

1232

872

43 7

241/4

616

127

in. 35 1/8 57 1/2

40 5/8 19 3/16 28 3/4 6 1/8

1032

892

1461

48 7

730

156

in. 40 1/8 6 13/16 43 11/32 19 3/16 30 11/16 7 7/8
mm 1019

1554

1101

48 7

779

Back wall of chase/enclosure
(including any finishing materials)

200

Figure 15 - Corner Framing with Square Termination (SV4.5HT-2)

Proper Sizing of Gas Line
Properly size and route the gas supply line
from the supply regulator to the area where
the appliance is to be installed per requirements outlined in the National Fuel Gas Code,
NFPA 54 - latest edition (USA) or B149 - latest
edition (Canada).
Never use galvanized or plastic pipe. Refer
to Table 9 for proper sizing of the gas supply line, if black iron pipe is being used. Gas
lines must be routed, constructed and made
of materials that are in strict accordance with
local codes and regulations. We recommend
that a qualified individual such as a plumber or
gas fitter be hired to correctly size and route
the gas supply line to the appliance. Installing
a gas supply line from the fuel supply to the
appliance involves numerous considerations of
materials, protection, sizing, locations, controls,
pressure, sediment, and more. Certainly no one
unfamiliar and unqualified should attempt sizing
or installing gas piping.

Schedule 40
Black Iron Pipe
Inside Diameter (Inches)
Schedule 40 Pipe
Length (feet)

Natural
Gas

Propane
Gas

0-10

1/2

3/8

10-40

1/2

40-100

1/2

100-150

3/4

1/2

150-200

3/4

1/2

Table 9
Notes:
• All appliances are factory-equipped with a
flexible gas line connector and 1/2 inch shutoff
valve (see Figure 48 on Page 24 ).
• See Massachusetts Requirements on Page 4
for additional requirements for installations in
the state of Massachusetts in the USA.
• The gas supply line should Not be connected
to the appliance until Step 6 (Page 24 ).

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

• A pipe joint compound rated for gas should be
used on the threaded joints. Ensure propane
resistant compounds are used in propane
applications. Be very careful that the pipe
compound does not get inside the pipe.
• It is recommended to install a sediment trap
in the supply line as close as possible to the
appliance (see Figure 48 ). Appliances using
Propane should have a sediment trap at the
base of the tank.
• Check with local building official for local code
requirements (i.e. are below grade penetrations
of the gas line allowed?, etc).
IMPORTANT: If propane is used, be aware that
if tank size is too small (i.e. under 100-lbs, if
this is the only gas appliance in the dwelling.
Ref. NPFA 58), there may be loss of pressure,
resulting in insufficient fuel delivery (which
can result in sooting, severe delayed ignition
or other malfunctions). Any damage resulting
from an improper installation, such as this, is
not covered under the limited warranty.

Step 3. Install the Vent System
General Information

These instructions should be used as a guideline and do not supersede local codes in any
way. Install vent according to local codes,
these instructions, the current National Fuel
Gas Code (ANSI-Z223.1) in the USA or the
current standards of CAN/CGA-B149.1 and
-B149.2 in Canada.

Use only approved venting components. See
Approved Vent Components on Page 2.
These fireplaces must be vented directly
to the outside.
The vent system may not service multiple
appliances, and must never be connected to a
flue serving a solid fuel burning appliance. The
vent pipe is tested to be run inside an enclosing
wall (such as a chase). There is no requirement
for inspection openings in the enclosing wall at
any of the joints in the vent pipe.
Preparing the Appliance Vent Collar on LMDV3530/4035 Series (Combined Top and Rear
Vent) Models.
Each of the unit's two vent collars are sealed
with a cover plate and a seal plate and gasket.
The cover, and seal plate and gasket must be
removed from the vent collar being used. Refer
to Figure 16 for top vent usage and Figure 17
for rear, and the following steps to prepare the
appropriate collar for use.
From the vent collar being used, remove the four
screws securing the vent seal plate and gasket.
Remove and discard the seal plate and gasket.
When the top vent collar is being used, from
inside the firebox, loosen the two screws in the
keyhole slots of the cover plate and remove the
remaining two cover plate securing screws.
Remove and discard the cover plate. Reinstall
and securely tighten all four screws.

WARNING
Failure to reinstall and securely
tighten cover plate screws could
result in leakage of flue products
into the living space. Vent cover
plate and vent seal plate must
remain securely installed on
unused vent collar. Failure to do
so could result in leakage of flue
products into living space.

When the rear vent collar is being used, from
inside the firebox, remove the two screws securing the lintel to the rear wall of the firebox,
then remove the lintel. Remove the four cover
plate securing screws.
Remove and discard the cover plate. Reinstall and securely tighten all four cover plate
screws. Re-secure the lintel to the rear wall
of the firebox.
On LMDV-3530/4035 Series Models
(Combined Top And Rear Vent Units)
Top Vent Seal & Cover Plate Removal
When Using The Top Vent
(OUTSIDE of
Appliance)

Gasket

Vent Restrictor Installation
(Top Vent)
A vent restrictor may be needed when vertically terminating the vent system above the roof
(when using the appliance top vent), install
vent restrictor in the top vent of the fireplace
outlet on LMDV-3530/4035 and LMDVT-3328
series models. If needed, install the restrictor
orientated as shown, either from inside or outside the unit,in the inner fireplace collar.
Restrictor

Vent Seal Plate
Securing
Screws

Cabinet Top

Inner
Fireplace
Collar

Appliance Top
Vent Outlet

Figure 18

Top Vent
Firebox Top
Cover Plate
Securing Screws
(Inside of Appliance)

Vent Cover Plate

Figure 16

CROSS SECTION

On LMDV-3530/4035 Series Models
(Combined Top And Rear Vent Units)
Rear Vent Seal & Cover Plate Removal
When Using The Rear Vent
Cover Plate
Securing Screws

Vent Restrictor Installation
(Rear Vent)
A vent restrictor may be needed when horzontally
terminating the vent system from the rear of the
appliance (when using the appliance rear vent),
install vent restrictor in the rear vent of the fireplace outlet on LMDV(R)-3328/3530/4035 series
models, in any installation that has a vertical vent
run in excess of three feet (0.914 meters).
If needed, install the restrictor orientated as
shown, either from inside or outside the unit,
in the inner fireplace collar

Vent Seal Plate
Gasket

(INSIDE of
Appliance)
Rear Vent

Inner Fireplace
Collar

Appliance Rear
Vent Outlet
Restrictor

Securing
Screws

Lintel
Cabinet
Back

Lintel
Securing
Screws
CROSS SECTION

(OUTSIDE of
Appliance)

Figure 17
Installation of Vent Restrictor
A vent restrictor may be needed with this appliance, install vent restrictor (provided) in the
appliance top flue outlet as shown in Figure 18
(LMDV-3328, LMDV-3530 and LMDV-4035) or
rear flue outlet as shown in Figure 19 (LMDV3328, LMDV-3530 and LMDV-4035). It is held
in place by friction, only.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Figure 19
Select Venting System - Horizontal or Vertical
With the appliance secured in framing, determine vent routing and identify the exterior
termination location. The following sections
describe vertical (roof) and horizontal (exterior
wall) vent applications. Refer to the section
relating to your installation. A list of approved
venting components is shown on Pages 31
and 32.

Vertical Termination Systems (Roof)
See Figure 20 on Page 12 and Figures 2832 on Pages 15 and 16 and their associated
Vertical Vent Tables which illustrate the various
vertical venting configurations that are possible
for use with these appliances. Secure Vent pipe
applications are shown in these Figures; Secure
Flex pipe may also be used. A Vertical Vent
Table summarizes each system’s minimum and
maximum vertical and horizontal length values
that can be used to design and install the vent
components in a variety of applications.
Both these vertical vent systems terminate
through the roof. The minimum vent height
above the roof and/or adjacent walls is specified in ANSI Z223.1-(latest edition) (In Canada,
the current CAN-1 B149 installation code) by
major building codes. Always consult your local codes for specific requirements. A general
guide to follow is the Gas Vent Rule (refer to
Figure 5 on Page 5 ).
Vertical (Straight) Installation
Determine the number of straight vent sections
required. 4-1/2" (114 mm), 10-1/2" (267 mm),
22-1/2" (572 mm), 34-1/2" (876 mm) and 461/2" (1181 mm) net section lengths are available
(see Table 11 and Page 31 - Item 3). Plan the
vent lengths so that a joint does not occur at
the intersection of ceiling or roof joists. Refer
to the Vent Section Length Chart.
SV4.5CGV-1
Termination

SV4.5FA OR
SV4.5FB Flashing
AND SV4.5SC
STORM COLLAR

1" (25.4 mm)
Minimum
Clearance to
Combustibles

�SV4.5VF
Firestop/Spacer

VENT SECTION LENGTH CHART

Y
1

144

T
O
TT
O
A
T
L
A
L
Q
Q
T
T
Y
Y
4

150

12.5

154.5

12.875

160.5

13.375

0
0

172.5

14.375

177

14.75

1.875

183

15.25

25.5

2.125

186

15.5

31.5

2.625

190.5

15.875

34.5

2.875

196.5

16.375

37.5

3.125

205.5

17.125

207

17.25

211.5

17.625

217.5

18.125

229.5

19.125

232.5

19.375

237

19.75

i*inches
nches

feet
ft

4.5

0.375

0.75

10.5

0.875

1.25

19.5

1.625

1.75

22.5

43.5
45

3.625
3.75

SV4.5L6/12/24/36/48
Vent Sections

�When using Secure Flex
use Firestop/Spacer
SF4.5VF

Figure 20
12

0
0

2
0

1
2

0
0

T
O
TT
A
O
LT
A

L
Q
T
Q
Y
T

Nominal Section
VENT SE6CTION12LENG24
TH CHA36RT 48
Length (inches)
Nominal Section 6
1
2
2
36
48
LenNet
gthSection
(inches) 4 ½ 10 ½ 224½ 34
½ 46 ½
Net S(inches)
ection
Length
Length (inches) 4-1/2 10-1/2 22-1/2 34-1/2 46-1/2
Vent
HHeight
eight of
of Vent
Vent
NuNumber
mber ooff V
entSections
Sections
i*inches
nches

feet
ft

46.5

3.875

49.5

4.125

4.25

55.5

4.625

241.5

20.125

4.75

246

20.5

5.25

252

67.5

5.625

264

5.75

276

279

23.25

73.5

6.125

280.5

23.375

79.5

6.625

283.5

23.625

6.75

289.5

24.125

7.5

301.5

25.125

91.5

7.625

310.5

25.875

7.75

315

26.5

325.5

27.125

97.5

8.125

330

27.5

102
103.5
108

8.5
8.625
9

2
0
1

0
0
0

0
3
3

2
0
0

4
3
4

336

345

28.75

349.5

29.125

114

9.5

372

376.5

31.375

379.5

31.625

418.5

34.875

423

35.25

465

38.75

117

9.75

118.5

9.875

126

10.5

130.5 10.875

40' Max
(12.2 M)

VENT SECTION LENGTH CHART

Nominal
6
12
24
36
48
Section Length
VENT SECTION LENGTH CHART
(inches)
Nominal
Section Length
6
12
24
36
48
Net
4 ½ 10 ½ 22 ½ 34 ½
46
(inSection
ches)
Length
Net S(inches)
ection 4-1/2 10-1/2 22-1/2 34-1/2 46½
-1/2
Length (inches)
Height of Vent
Number of Vent Sections
Height of Vent
Number of Vent Sections

135

11.25

138

11.5

139.5 11.625

142.5 11.875

Table 10a

Table 10b
Effective Vent Length
Model

Effective Length

SV4.5L6

4-1/2"

* Convert inches into metric equivalent measure, as follows:

SV4.5L12

10-1/2"

SV4.5L24

22-1/2"

Millimeters (mm) = Inches x 25.4
Centimeters (cm) = Inches x 2.54
Meters (M) = Inches x .0254

SV4.5L36

34-1/2"

SV4.5L48

46-1/2"

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Table 11

Vertical (Offset) Installation
Analyze the vent routing and determine the
quantities of vent sections and number of elbows
required. Refer to Vertical Vent Figures and
Tables on Pages 15 and 16 to select the type
of vertical installation desired. Vent sections
are available in net lengths of 4-1/2" (114 mm),
10-1/2" (267 mm), 22-1/2" (572 mm), 34-1/2"
(876 mm) and 46-1/2" (1181 mm). Refer to the
Vent Section Length Chart on Page 12 for an
aid in selecting length combinations. Elbows are
available in 90° and 45° configurations. Refer
to Figure 24 on Page 14 for the SV4.5E45 and
SV4.5E90 elbow dimensional specifications.
Where required, a telescopic vent section
(SV4.5LA) may be used to provide the installer
with an option in installing in tight and confined
spaces or where the vent run made up of fixed
length pieces develops a joint in a undesirable
location, or will not build up to the required
length. The SV4.5LA Telescopic Vent Section
has an effective length of from 1-1/2" (38 mm)
to 7-1/2" (191 mm). The SV4.5LA is fitted with
a locking inclined channel end (identical to a
normal vent section component) and a plain end
with 3 pilot holes. Slip the plain end over the
locking channel end of a standard SV4.5 vent
component the required distance and secure
with three screws.
Maintain a minimum 1" (25 mm) clearance to
combustible materials for all vertical elements.
Clearances for all horizontal elements are 3"
(76 mm) on top, 1" (25 mm) on sides and 1"
(25 mm) on the bottom.
A. Frame ceiling opening - Use a plumb line
from the ceiling above the appliance to locate
center of the vertical run. Cut and/or frame an
opening, 10-1/2" x 10-1/2" (267mm x 267mm)
inside dimensions, about this center mark
(Figure 21).

10-1/2" Min.
(267 mm)

B. Attach vent components to appliance
- Secure Vent SV4.5 direct vent system components are unitized concentric pipe components
featuring positive twist lock connections (see
Figure 22).

To add another vent component to a length of
vent run, align the dimpled end over the inclined
channel end of the previously installed section,
adjusting the radial alignment until the four locking dimples are aligned with the inlets of the four
incline channels of the previous section.

All of the appliances covered in this document
are fitted with collars having locking inclined
channels. The dimpled end of the vent components fit over the appliance collar to create
the positive twist lock connection.

Push the vent component against the previous
section until it fully engages, then twist the
component clockwise running the dimples down
and along the incline channels until they seat at
the end of the channels. This seating position
is indicated by the alignment of the arrow and
dimple as shown in Figure 22.

Arrow

Align the dimple (four places) of the
upper vent section with the opening
of the locking incline channel on the
lower vent section or appliance collar. Twist vent component clockwise
to engage and seal until arrow and
dimple align.
Dimple
Locking Incline
Channel

Connected Vent
Sections
Appliance Collar or
Vent Section

Arrow

Figure 22
To attach a vent component to the appliance collar,
align the dimpled end over the collar, adjusting the
radial alignment until the four locking dimples are
aligned with the inlet of the four inclined channels
on the collar (refer to Figure 22). Push the
vent component against the collar until it fully
engages, then twist the component clockwise,
running the dimples down and along the incline
channels until they seat at the end of the channels. The unitized design of the Secure Vent
components will engage and seal both the inner
and outer pipe without the need for sealant or
screws. If desired, a #6 x 1/2" screw may be
used at the joint, but is not required as the pipe
will securely lock when twisted.

D. Install firestop/spacer at ceiling - When
using Secure Vent, use SV4.5VF firestop/spacer
at ceiling joists; when using Secure Flex, use
SF4.5VF firestop/spacer. If there is living space
above the ceiling level, the firestop/spacer
must be installed on the bottom side of the
ceiling. If attic space is above the ceiling, the
firestop/spacer must be installed on the top side
of the joist. Route the vent sections through the
framed opening and secure the firestop/spacer
with 8d nails or other appropriate fasteners at
each corner. Remember to maintain 1" (25 mm)
clearance to combustibles, framing members,
and attic or ceiling insulation when running
vertical chimney sections. Attic insulation
shield (H3907) may be used to obtain the
required clearances indicated here. See
installation accessories Pages 31 & 32.
E. Support the vertical vent run sections Note - Proper venting support is very important.
The weight of the vent must not be supported
by the fireplace in any degree.
Support the vertical portion of the venting
system every 8 feet (2.4m) above the fireplace
vent outlet.

Blocking

Note: An elbow may also be attached to the
appliance collar. Attach in the same manner
as you would a vent section.

Support Straps
(Plumber's tape)

C. Attach vent components to each other
- Other vent sections may be added to the
previously installed section in accordance with
the requirements of the vertical vent Figures
and Tables.

Figure 21

8 feet (2.4 m)
Maximum

Figure 23
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

1 inch (25.4
mm) minimum
clearance to
combustibles

One method of support is by utilizing field provided support straps (conventional plumber's
tape). Secure the plumber's tape to the framing
members with nails or screws. Loop the tape
around the vent, securing the ends of the tape
to the framing. If desired, sheet metal screws #6
x 1/2" length may be used to secure the support
straps to the vent pipe. Refer to Figure 23.
F. Change vent direction to horizontal/inclined
run - At transition from or to a horizontal/inclined run, install the SV4.5E45 and SV4.5E90
elbows in the same manner as the straight vent
sections. The elbows feature a twist section to
allow them to be routed about the center axis
of their initial collar section to align with the
required direction of the next vent run element.
Twist elbow sections in a clockwise direction
only so as to avoid the possiblity of unlocking
any of the previously connected vent sections.
See Figure 24.

Framing Dimensions for Roof
Inches (millimeters)
Pitch

0/12

10-1/2 in.
(267 mm)

6/12

10-1/2 in.
(267 mm)

12 in.
(305 mm)

12/12

10-1/2 in.
(267 mm)

17 3/4 in.
(451 mm)

K. Install the vertical termination - The final
step involves installation of the SV4.5CGV-1
Vertical Termination. Extend the vent sections
to the height as shown in the "Vertical vent
termination section" in Figure 5 on Page 5. The
SV4.5CGV-1 Vertical Termination (Figure 27)
can be installed in the exact same fashion as any
other Secure Vent section. Align the termination
over the end of the previously installed section,
adjusting the radial alignment until the four
locking dimples of the termination are aligned
with the inlets of the four incline channels of the
last vent section. Push the termination down
until it fully engages, then twist the termination
clockwise running the dimples down and along
the incline channels until they are seated at the
end of the channels.

Figure 25- Roof Framing

8-1/8"
7-5/8”
(194
(206 mm)
mm)

4-13/16
(122 mm)

Swivel Joint
(360° swivel)
SV4.5E45
45° Elbow)

Swivel Joint
(360° swivel)
SV4.5E90
90° Elbow)

Figure 24
G. Continue installation of horizontal/inclined
sections - Continue with the installation of the
straight vent sections in horizontal/inclined run
as described in Step C. Install support straps
every 5 ft. (1.52 m) along horizontal/inclined
vent runs using conventional plumber’s tape.
See Page 17, Figure 33. It is very important
that the horizontal/inclined run be maintained
in a straight (no dips) and recommended to be
in a slightly elevated plane, in a direction away
from the fireplace of 1/4 " rise per foot (20 mm
per meter) which is ideal, though rise per foot
run ratios that are smaller are acceptable all the
way down to at or near level. Use a carpenter’s
level to measure from a constant surface and
adjust the support straps as necessary.

I. Install the roof flashing - Extend the vent
sections through the roof structure. Install the
roof flashing over the vent section and position such that the vent column rises vertically
(use carpenters level) (Figure 26). Nail along
perimeter to secure flashing or adjust roofing
to overlap the flashing edges at top and sides
only and trim where necessary. Seal the top
and both sides of the flashing with waterproof
caulking.
J. Install the storm collar - Install the storm
collar, supplied with the flashing, over the
vent/flashing joint. See Figure 26. Loosen the
storm collar screw. Slide collar down until it
meets the top of the flashing. Tighten the adjusting screw. Apply non-combustible caulking
or mastic around the circumference of the joint
to provide a water tight seal.

If the vent system extends more than 5 feet (1.5
m) above the roof flashing, stabilizers may be
necessary. Additional screws may be used at
section joints for added stability. Guide wires
may be attached to the joint for additional support on multiple joint configurations.

VERTICAL VENT FIGURES/TABLES
Storm
Collar

Note: Secure Vent (rigid vent pipe) is shown
in the Figures; Secure Flex (flexible vent pipe)
may also be used.

WARNING

It is important to maintain the required clearances to combustibles: 1" (25 mm) at all sides
for all vertical runs; and 3" (76 mm) at the top,
1" (25 mm) at sides, and 1" (25 mm) at the
bottom for all horizontal/inclined runs.
H. Frame roof opening - Identify location for
vent at the roof. Cut and/or frame opening per
Roof Framing Chart (Figure 25).

Figure 27

Under No Circumstances, May Separate Sections of Concentric Flexible
Vent Pipe Be Joined Together.
Figure 26

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Notes:
• It is very important that the horizontal/inclined run be maintained in a straight (no
dips) and recommended to be in a slightly
elevated plane, in a direction away from the
fireplace of 1/4" rise per foot (20 mm per
meter) which is ideal, though rise per foot
run ratios that are smaller are acceptable all
the way down to at or near level.
• SV4.5VF (Secure Vent), SF4.5VF (Secure
Flex) firestop/spacer must be used anytime
vent pipe passes through a combustible
floor or ceiling. SV4.5HF (Secure Vent),
SF4.5HF (Secure Flex)firestop/spacer must
be used anytime vent pipe passes through
a combustible wall.
• Two 45 degree elbows may be used in place
of one 90 degree elbow. The same rise to
run ratios, as shown in the venting Figures
for 90 elbows, must be followed if 45 degree
elbows are used.
• AN ELBOW IS ACCEPTABLE AS 1 FOOT OF
VERTICAL RISE EXCEPT WHERE AN ELBOW
IS THE ONLY VERTICAL COMPONENT IN
THE SYSTEM (See Figure 37).

Table A
H Maximum

u When using Secure Flex, use Firestop /

V Minimum

feet

(meter)

feet

(meter)

(0.610)

(0.305)

(1.219)

(0.610)

(1.829)

(0.914)

(2.438)

(1.219)

Spacer SF4.5VF.

u Ceiling Firestop /
Spacer (SV4.5VF)

V + H = 40 feet (12.2 meters) Max.
H = 8 feet (2.4 meters) Max.
Ratio V to H ratio is 1:2

Example: If 8 feet of (H) horizontal vent run
is needed, then 4 feet minimum (V) vertical
vent will be required.
This table shows a 1(V) to 2(H) ratio. For
every 1 foot of (V) vertical, you are allowed 2
feet of (H) horizontal run, up to a maximum
horizontal run of 8 feet.

Figure 29 - Rear Vent - ONE 90 DEGREE ELBOW

Table B
H

H Maximum

u Ceiling Firestop /

Spacer (SV4.5VF)

40 feet
(12.2 meters)
Maximum

vWall Firestop/
Spacer (SV4.5HF)

SF4.5VF

A Vent Restrictor, as shown in Figure 18
Page 11, must be used in this application

Figure 28 - Top Vent - STRAIGHT

feet

(meter)

feet

(meter)

(1.524)

(0.305)

(3.048)

(0.610)

(4.572)

(0.914)

(6.096)

(1.219)

Elbow Only

V + V1 + H = 40 feet (12.2 m) Max.
H = 20 feet (6.096 meters) Max.
V

u When using Secure Flex, use Firestop / Spacer

V Minimum

u When using Secure Flex, use Firestop /
Spacer SF4.5VF.
v When using Secure Flex, use Firestop /
Spacer SF4.5HF.

Example: If 20 feet of (H) horizontal vent run
is needed, then 4 feet minimum of (V) vertical
vent will be required.
This table shows a 1(V) to 5(H) ratio. For
every 1 foot of (V) vertical, you are allowed 5
feet of (H) horizontal run, up to a maximum
horizontal run of 20 feet.
An elbow is acceptable as 1 foot of vertical
rise except where an elbow is the only vertical
component in the system. See Figure 37.

Figure 30 - Top Vent - TWO 90 DEGREE ELBOWS

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

VERTICAL VENT FIGURES/TABLES (CONTINUED)
Table C
H+H1 Maximum

H Maximum

V Minimum

feet

(meter)

feet

(meter)

feet

(meter)

(1.524)

(0.610)

(0.305)

(3.048)

(1.219)

(0.610)

(4.572)

(1.829)

(0.914)

(6.096)

(2.438)

(1.219)

V + V1 + H + H1 = 40 feet (12.2 m) Max
H = 8 feet (2.438 meters) Max.
H + H1 = 20 feet (6.096 meters) Max.

u Ceiling
Firestop / Spacer
(SV4.5VF)
vWall Firestop/
Spacer (SV4.5HF)
u Ceiling
Firestop / Spacer
(SV4.5VF)

u When using Secure Flex, use Firestop / Spacer SF4.5VF
v When using Secure Flex, use Firestop / Spacer SF4.5HF
Example: If 20 feet total (H+H1) horizontal vent run is needed,
then 4 feet minimum of (V) vertical vent will be required.

This table shows a 1(V) to 5(H) ratio. For every 1 foot of (V)
vertical, you are allowed 5 feet of (H+H1) horizontal run up to a
maximum total horizontal run of 20 feet.

Figure 31 - Rear Vent - three elbows

Table D
V Minimum

H + H1 Maximum
feet

(meter)

(1.524)

feet

(meter)
Elbow Only

(1.524)

(0.305)

(3.048)

(0.610)

(4.572)

(0.914)

(6.096)

(1.219)

H + H1 = 20 feet (6.096 m) Max.
V + V1 + H + H1 = 40 ft. (12.192 m) Max.

Example: If 20 feet total (H+H1)
horizontal vent run is needed,
then 4 feet minimum of (V) vertical vent will be required.
This table shows a 1(V) to 5(H)
ratio. For every 1 foot of (V)
vertical, you are allowed 5 feet
of (H+H1) horizontal run up to
a maximum total horizontal run
of 20 feet.

u Ceiling
Firestop / Spacer
(SV4.5VF)

An elbow is acceptable as 1 foot
of vertical rise except where
an elbow is the only vertical
component in the system. See
Figure 37.

vWall Firestop/
Spacer (SV4.5HF)

V
H1

u When using Secure Flex, use Firestop / Spacer SF4.5VF
v When using Secure Flex, use Firestop / Spacer SF4.5HF
Figure 32 - Top Vent - three elbows
Horizontal (Outside Wall)
Termination System
Figure 33 on Page 17, and Figures 34 to 42 on
Pages 18 to 21 and their associated Horizontal
Vent Table illustrate the various horizontal
venting configurations that are possible for
use with these appliances. Secure Vent pipe
applications are shown in these Figures; Secure
Flex pipe may also be used. A Horizontal Vent
Table summarizes each system’s minimum and
maximum vertical and horizontal length values
that can be used to design and install the vent
components in a variety of applications.
16

Both of these horizontal vent systems terminate
through an outside wall. Building Codes limit or
prohibit terminating in specific areas. Refer to
Figure 7 on Page 6 for location guidelines.
Secure Vent SV4.5 direct vent system components are unitized concentric pipe components
featuring positive twist lock connection, (refer
to Figure 22 on Page 13). All of the appliances covered in this document are fitted with
collars having locking inclined channels. The
dimpled end of the vent components fit over
the appliance collar to create the positive twist
lock connection.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

A. Plan the vent run Analyze the vent routing and determine the
types and quantities of sections required
4-1/2" (114 mm), 10-1/2" (267 mm), 22-1/2"
(572 mm), 34-1/2" (876 mm) and 46-1/2" (1181
mm) net section lengths are available. Plan the
vent lengths so that a joint does not occur at the
intersection of ceiling or roof joists. Make allowances for elbows as indicated in Figure 24.
Maintain a minimum 1" (25 mm) clearance to
combustibles on the vertical sections. Clearances for the horizontal runs are; 3" (76 mm)
on top, 1" (25 mm) on sides, and 1" (25 mm)
at the bottom.

Building
Support
Framing

Support Brackets

TYPICAL HORIZONTAL VENT INSTALLATION
Horizontal / Inclined Run

SV4.5 HT-2
Termination
Shown

SV4.5E90
Elbow

Ceiling

SV4.5L6/12/24/36/48
Vent Sections

u Firestop / Spacer

Vertical
Rise

SV4.5VF

Exterior
Wall

Support Bracket Spacing
Every 5 ft (1.52 m)

u When Using Secure Flex,
Use Firestop / Spacer SF4.5VF
See Figure 20 on Page 12 or Figure 23 on
Page 13 for vertical vent section support.

SV4.5 HT-2
Termination
Shown

Fireplace

Figure 33
B. Frame exterior wall opening Locate the center of the vent outlet on
the exterior wall according to the dimensions shown in Figure 14 on Page 9. Cut
and/or frame an opening, 10-1/2" x 12 1/8"
(267 mm x 308mm) inside dimensions, about
this center.
C. Frame ceiling opening - If the vertical route
is to penetrate a ceiling, use plumb line to locate
the center above the appliance. Cut and/or frame
an opening, 10-1/2" x 10-1/2" (267 mm x 267
mm) inside dimensions, about this center (refer
to Figure 21 on Page 13 ).
D. Attach vent components to appliance - To
attach a vent component to the appliance collar,
align the dimpled end over the collar, adjusting the
radial alignment until the four locking dimples are
aligned with the inlets of the four incline channels
on the collar (see Figure 22 on Page 13).
Push the vent component against the collar
until it fully engages, then twist the component
clockwise, running the dimples down and along
the incline channels until they seat at the end
of the channels.
The unitized design of the Secure Vent
components will engage and seal both the
inner and outer pipe elements with the same
procedure. Sealant and securing screws are
not required.
Note: An elbow may also be attached to the
appliance collar. Attach in the same manner
as you would a vent section.

E. Attach vent components to each other
- Other vent sections may be added to the previously installed section in accordance with the
requirements of the vent tables. To add another
vent component to a length of vent run, align the
dimpled end of the component over the inclined
channel end of the previously installed section,
adjusting the radial alignment until the four locking dimples are aligned with the inlets of the four
incline channels of the previous section.
Push the vent component against the previous
section until it fully engages, then twist the
component clockwise running the dimples down
and along the incline channels until they seat at
the end of the channels. This seating position
is indicated by the alignment of the arrow and
dimple as shown in Figure 22 on Page 13.
F. Install firestop/spacer at ceiling When using Secure Vent, use SV4.5VF firestop/
spacer at ceiling joists; when using Secure Flex,
use SF4.5VF firestop/spacer.
If there is living space above the ceiling level,
the firestop/ spacer must be installed on the
bottom side of the ceiling. If attic space is
above the ceiling, the firestop/ spacer must be
installed on the top side of the joist. Route the
vent sections through the framed opening and
secure the firestop/spacer with 8d nails or other
appropriate fasteners at each corner.
Remember to maintain 1" (25 mm) clearance
to combustibles, framing members, and attic
or ceiling insulation when running vertical
chimney sections.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

G. Support the vertical run sections See Section E on Page 13.
H. Change vent direction - At transition from or
to a horizontal/inclined run, install the SV4.5E45
and SV4.5E90 elbows in the same manner as
the straight vent sections. The elbows feature a
twist section to allow them to be routed about the
center axis of their initial collar section to align
with the required direction of the next vent run
element. Twist elbow sections in a clockwise
direction only so as to avoid the possiblity of
unlocking any of the previously connected vent
sections. See Figure 22 on Page 13.
I. Continue installation of horizontal/inclined
sections - Continue with the installation of the
straight vent sections in horizontal/inclined run
as described in Step E. Install support straps
every 5 ft. (1.52 m) along horizontal/inclined
vent runs using conventional plumber’s tape.
See Figure 33. It is very important that the
horizontal/inclined run be maintained in a
straight (no dips) and recommended to be in
a slightly elevated plane, in a direction away
from the fireplace of 1/4" rise per foot (20 mm
per meter) which is ideal, though rise per foot
run ratios that are smaller are acceptable all the
way down to at or near level.
It is important to maintain the required clearances to combustibles: 1" (25 mm) at all sides
for all vertical runs; and 3" (76 mm) at the top,
1" (25 mm) at sides, and 1" (25 mm) at the
bottom for all horizontal/inclined runs.

J. Assemble vent run to exterior wall - If not
previously measured, locate the center of the
vent at the exterior wall. Prepare an opening as
described in Step B. Assemble the vent system
to point where the terminus of the last section is
located relative to the exterior surface to which
the termination is to be attached as shown in
Figure 35 and Table 12 on Pages 18 & 19.
If the terminus of the last section is not within
this distance, use the telescopic vent section
SV4.5LA, as the last vent section. For wall
thicknesses greater than that shown in Figure
35, refer to Table 12 on Page 19. This Table
lists the additional venting components needed
(in addition to the termination and adapter) for
a particular range of wall thicknesses.
K. Attach termination adapter - Attach the
adapter (adapter - SV4.5RCH - provided with the
termination) to the vent section or telescoping
vent section), elbow or appliance collar as shown
in Figure 34 in the same manner as any SV4.5
vent component (refer to Step E).
L. Install Firestop/Spacer at exterior wall
- When using the square termination, install
SV4.5HF (Secure Vent), SF4.5HF (Secure Flex)
Firestop/Spacer over the opening at the exterior
side of the framing, long side up, with the 3 inch
spacer clearance at the top as shown in Figure
34, and nail into place.
(The Firestop/Spacer may also be installed over
the opening at the interior side of framing).

To help minimize water infiltration it is
recommended that the Firestop/Spacer
(SV4.5HF) be installed on the exterior
side of the wall.

12-1/8"
(308 mm)

IMPORTANT
The vent termination is hot while
in operation and for a period of
time following the use of the fireplace. To prevent contact with hot
surfaces, we recommend the use
of a Termination Guard. See Items
12 and 13 on Page 31. This can be
purchased at your local dealer.

10-1/2"
(267mm)

5-1/8"
(130 mm)

3"
(76 mm)

1"
(25.4 mm)

Adapter
SV4.5RCH

Note: Centerline of Vent Piping is
NOT the Same as the Centerline of
the Framed Opening.

See Figure 14 on Page 9 for Min.
Distance to Base of Appliance.

6 to 48 inch Vent Section,
Telescopic vent section,
Elbow or Appliance Collar

Base of Appliance

Figure 34 - INSTALLING SQUARE HORIZONTAL TERMINATION (SV4.5HT-2)

� Use silicone caulking to seal
the top and sides of the
termination, up to the
underlayment, stucco, or
masonry wall surface.
�Caulk

Siding

Maximum Wall Thickness
10 in. (254 mm) �
Interior Surface of
Finished Wall
Maximum Extent of
Vent Run Sections
Relative to Exterior
Surface of Framing

Last Vent Section.
Use Telescopic Vent
Section (SV4.5LA), If
Necessary

M. Install the Square Termination (SV4.5HT-2)
Install the square termination - For the last step
, from outside the exterior wall, slide the collars
of the termination onto the adapter (the outer
inside the outer and the inner outside the inner)
until the termination seats against the exterior
wall surface to which it will be attached. Orient
the housing of the termination with the arrow
pointed upwards. Secure the termination to
the exterior wall. The horizontal termination
must not be recessed into the exterior wall
or siding by more than the 1-1/4" (32 mm) as
shown in Figure 35.

7"
(178)

SV4.5 HT-2
Termination

�Caulk

Stucco

Figure 35

SV4.5 HT-2
Termination

Adapter
SV4.5RCH

Exterior Surface of Siding
Exterior Surface of
Framing
6 in. to 9-1/4 in.�
(152 to 235 mm)

SV4.5 HT-2
Termination

1-1/4” Maximum Recess of
Square Termination
into Exterior Finishing Material

vFor thicknesses greater
than 10", see Table 12
Venting Connection and Exterior Wall Recessing of the Horizontal Square
Termination (SV4.5HT-2).

Horizontal terminations have been designed to perform in a wide range of weather conditions. Our terminations meet or exceed industry standards.
When selecting the locations of your horizontal terminations, do not place the termination where water from eaves and adjoining rooflines may create a heavy flow of cascading water onto the termination cap. If the cap must be placed where the possibility of
cascading water exists, it is the responsibility of the builder to direct the water away
from the termination cap by using gutters or other means.
Take care to carefully follow the installation instructions for the termination, including
the use of silicone caulking where required.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

HORIZONTAL VENT FIGURES/TABLES

WARNING

Notes:
• Secure Vent components (rigid vent pipe and terminal) are shown in
the Figures; Secure Flex components (flexible vent pipe and terminal)
may also be used.
• Two 45 degree elbows may be used in place of one 90 degree elbow.
The same rise to run ratios, as shown in the venting Figures for 90
elbows,must be followed if 45 degree elbows are used.
• SV4.5VF (Secure Vent), SF4.5VF (Secure Flex) firestop/spacer must
be used anytime vent pipe passes through a combustible floor or ceiling. SV4.5HF (Secure Vent), SF4.5HF (Secure Flex) firestop/spacer
must be used anytime vent pipe passes through a combustible wall.
• It is very important that the horizontal/inclined run be maintained
in a straight (no dips) and recommended to be in a slightly elevated
plane, in a direction away from the fireplace of 1/4" rise per foot (20
mm per meter) which is ideal, though rise per foot run ratios that are
smaller are acceptable all the way down to at or near level.
• The tables show a 1(V) to 5(H) ratio up to a maximum horizontal run
of 20 feet except for installations where an elbow is the only vertical
vent section in the system (see Figure 37).
• AN ELBOW IS ACCEPTABLE AS 1 FOOT OF VERTICAL RISE EXCEPT
WHERE AN ELBOW IS THE ONLY VERTICAL COMPONENT IN THE
SYSTEM. See Figure 37.
Venting Components Required for Various Exterior Wall Thicknesses, when using Square Termination Kit (SV4.5HT-2)
Vent Components Required

Exterior Wall Thickness - inches (mm)

Termination Kit Only

6 to 9-1/4 (152 to 235)

Termination Kit and 6 In. Vent
Section (SV4.5L6)

10-3/4 to 14 (273 to 356)

Termination Kit and 12 in.
Vent Section (SV4.5L12)

16-3/4 to 20 (426 to 508)

Termination Kit and Telescopic Section (SV4.5L12)

11-3/4 to 20 (299 to 508)
Note: See Figure 35 showing wall thickness range
when using SV4.5HT-2 termination kit only.

Table 12

See Table 12 as an aid in venting component selection for a particular
range of exterior wall thicknesses.

Under no circumstances, may separate sections of
concentric flexible vent pipe be joined together.
Table F
H Maximum
feet

(meter)

(0.914)

V Minimum
feet

(meter)

Elbow Only

Square termination
(SV4.5HT-2) shown.

H
V

�When using Secure Flex,
use Firestop/Spacer
SF4.5HF

�Wall
Firestop/Spacer
(SV4.5HF)

See Table 12 as an aid in venting component selection for a particular
range of exterior wall thicknesses.

Figure 37 - Top Vent ONE 90 DEGREE ELBOW - ELBOW CONNECTION AT APPLIANCE

Table G
V Minimum

H Maximum
feet

(meter)

feet

(meter)

(1.524)

(0.305)

(3.048)

(0.610)

(4.572)

(0.914)

(6.096)

(1.219)

use Firestop/Spacer
SF4.5HF

This table shows a 1(V) to
5(H) ratio. For every 1 foot of
vertical, you are allowed 5 feet
of (H) horizontal run up to a
maximum (H) horizontal run
of 20 feet.

V + H = 40 feet (12.2 m) Max.
H = 20 ft. (6.096 m) Max.
H

H = 28 in. (711 mm) Maximum.

�When using Secure Flex,

Example: If 20 feet of (H) horizontal vent run is needed, then
4 feet minimum of (V) vertical
vent will be required.

�When using Secure Flex,
use Firestop/Spacer
SF4.5VF.

�When using Secure Flex,
use Firestop/Spacer
SF4.5HF.

�Wall Firestop/Spacer
(SV4.5HF)

7 in. (178 mm)

Square termination
(SV4.5HT-2) shown.
Square termination
(SV4.5HT-2) shown.

Figure 36 - Rear Vent - NO ELBOWS - Square Horizontal
Termination (SV4.5HT-2)

�Ceiling
Firestop/Spacer
(SV4.5VF)

See Table 12 as an aid in venting component selection for
a particular range of exterior wall thicknesses.

Figure 38 - Top Vent - ONE 90 DEGREE ELBOW -

ELBOW CONNECTION NOT DIRECTLY AT APPLIANCE

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

HORIZONTAL VENT FIGURES / TABLES (CONTINUED)

Table H
H+H1 Maximum

�Wall

Firestop/Spacer
(SV4.5HF)

�Ceiling

feet

(meter)

feet

(meter)

feet

(meter)

(1.524)

(0.610)

(0.305)

(3.048)

(1.219)

(0.610)

(4.572)

(1.829)

(0.914)

(6.096)

(2.438)

(1.219)

V + H + H1 = 40 feet (12.2 m) Max
H = 8 feet (2.438 meters) Max.
H + H1 = 20 feet (6.096 meters) Max.

Firestop/Spacer
(SV4.5VF)

�When using
Secure Flex, use
Firestop/Spacer
SF4.5VF.
V

V Minimum

H Maximum

�When using
Secure Flex, use
Firestop/Spacer
SF4.5HF.

See Table 12 on Page 19 as an aid in venting component
selection for a particular range of exterior wall thicknesses.

Square termination (SV4.5HT-2) shown.

Figure 39 - Rear Vent - TWO 90 DEGREE ELBOWS

Table J

�Wall Firestop/Spacer

H + H1 Maximum

(SV4.5HF)

H
H1

Secure Flex, use
Firestop/Spacer SF4.5VF.

�When using Secure Flex,

�Wall Firestop/Spacer

(meter)

(0.914)

Square termination (SV4.5HT-2) shown.

�Ceiling
Firestop/Spacer
(SV4.5VF)

See Table 12 on Page 19 as an aid in venting
component selection for a particular range of
exterior wall thicknesses.

Figure 40 - Top Vent - TWO 90 DEGREE ELBOWS

feet

(meter)

(1.524)

(0.305)

(3.048)

(0.610)

(4.572)

(0.914)

(6.096)

(1.219)

Elbow Only

V + H + H1 = 40 feet (12.2 m) Max.
H + H1 = 20 ft. (6.096 m) Max.

(SV4.5HF)

use Firestop/Spacer
SF4.5HF.

feet

�Note - When using

V Minimum

Example: If 20 feet of (H + H1) horizontal vent run is needed,
then 4 feet minimum of (V) vertical vent will be required.
This table shows a 1(V) to 5(H) ratio. For every 1 foot of (V)
vertical, you are allowed 5 feet of (H+ H1) horizontal run, up
to a maximum horizontal run of 20 feet.
An elbow is acceptable as 1 foot of vertical rise except where
an elbow is the only vertical component in the system. See
Figure 37.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

HORIZONTAL VENT FIGURES / TABLES (CONTINUED)
Table K
H + H1 + H2 Maximum

�Wall Firestop/Spacer

V Minimum

H Maximum

(SV4.5HF)

feet

(meter)

feet

(meter)

feet

(meter)

(1.524)

(0.610)

(0.305)

(3.048)

(1.219)

(0.610)

(4.572)

(1.829)

(0.914)

(6.096)

(2.438)

(1.219)

V + H + H1 + H2 = 40 feet (12.2 m) Max
H = 8 feet (2.438 meters) Max.
H + H1+ H2 = 20 feet (6.096 meters) Max.

Square termination
(SV4.5HT-2) shown.

�Ceiling
Firestop/Spacer
(SV4.5VF)

�When using Secure Flex,
use Firestop/Spacer
SF4.5VF.

�When using Secure

Example: If 20 feet total (H+H1+H2) horizontal vent
run is needed, then 4 feet minimum of (V) vertical
vent will be required.

Flex, use Firestop/Spacer
SF4.5HF.

This table shows a 1(V) to 5(H) ratio. For every
1 foot of (V) vertical, you are allowed 5 feet of
horizontal run up to a maximum total (H+H1+H2)
horizontal run of 20 feet.
See Table 12 on Page 19 as an aid in venting
component selection for a particular range of
exterior wall thicknesses.

Figure 41 - Rear Vent - THREE 90 DEGREE ELBOWS

Table L

Square termination
(SV4.5HT-2) shown.

use Firestop/Spacer
SF4.5VF.
�When using Secure
Flex, use Firestop/Spacer
SF4.5HF.

�Ceiling

Firestop/Spacer
(SV4.5VF)

(SV4.5HF)

V1
V

See Table 12 on Page 19 as
an aid in venting component
selection for a particular
range of exterior wall thicknesses.

feet

(meter)

feet

(meter)

(1.524)

(0.305)

(3.048)

(0.610)

(4.572)

(0.914)

(6.096)

(1.219)

Elbow Only

H + H1 = 20 feet (6.096 m) Max.
V + V1+ H + H1 = 40 ft. (12.192 m) Max.

�Wall Firestop/Spacer

V Minimum

H + H1 Maximum

�When using Secure Flex,

Example: If 20 feet total (H+H1) horizontal vent
run is needed, then 4 feet minimum of (V) vertical
vent will be required.
This table shows a 1(V) to 5(H) ratio. For every 1
foot of (V) vertical, you are allowed 5 feet of (H+
H1) horizontal run, up to a maximum horizontal
run of 20 feet.

�Wall Firestop/Spacer
(SV4.5HF)

An elbow is acceptable as 1 foot of vertical rise except
where an elbow is the only vertical component in
the system. See Figure 37.

Figure 42 - Top Vent - THREE 90 DEGREE ELBOWS
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Vertical or Horizontal Venting Using
Secure Flex Kits and Components
Secure Flex venting kits and components
may be used in any venting application in
place of rigid Secure Vent (SV4.5) direct vent
components. All restrictions, clearances and
allowances that pertain to the rigid piping apply
to the flexible venting. Secure Flex kits may
not be modified; also, under no circumstances
may separate sections of flex pipe be joined
together.

APPLY ONLY MIL-PAC BLACK
HIGH TEMPERATURE SEALANT
(Cat. No. 10K81) to the outside
surface of both collars of the
adapter (be especially careful to
fill the grooves of the outer collar
to be covered by the flexible pipe)
and slide flexible pipe over inner
and outer adapter collars.

Using adapter (SV4.5RF), Secure Flex kits
may be added to the end of a vent run made
up of rigid Secure Vent (SV4.5) vent sections
provided that doing so does not violate any of
the venting length, height, routing, horizontal
to vertical ratio requirements or clearance
considerations detailed in this manual.

1 3/4 inch (44 mm) Flexible
Pipe and Adapter Outer Collar
Overlap

Secure Flex kits come with an adapter that
can be fitted to the inclined channel end of
the last Secure Vent (SV4.5) vent section in a
rigid system in the exact same fashion as any
other Secure Vent section. Align the dimpled
end of the adapter over the previously installed
section or appliance collar, adjusting the radial
alignment until the four locking dimples of the
adapter are aligned with the inlets of the four
incline channels of the last vent section or collar.
Push on the adapter until it fully engages, then
twist the adapter clockwise running the dimples
down and along the incline channels until they
seat at the end of the channels.
Attach the flexible vent to the adapter as follows (see also Figure 43):
A. Install the Inner Flex Pipe 1. Install the small gear clamp loosely around
the inner flexible vent pipe, push it back out
of the way.
2. Apply a bead of Mill-Pac Black (700° F) high
temperature sealant - Catalog No. 10K81
to the inner adapter collar, approximately
1/2 inch from the end.
3. Pull and extend the inner flexible vent pipe.
4. Slide the inner flex pipe over the adapter collar. Ensure the flexible vent pipe completely
engages the adapter collar to a distance of 1
3/4 inches from the end, and that it is free
from damage or tears.
5. Slide the gear clamp down and tighten it
fully to secure the flexible vent to the adapter
inner collar approximately 3/4 inch from the
end of the flex.
6. Install three screws 120 degrees apart through
the flexible vent pipe and into the adapter collar
just below the gear clamp to provide additional
security to the connection.

Flex Vent

Note: Outer Pipe Is Pulled Away To Show
The Detail of The Inner Pipe

Securing Screw - 3 Places
Equidistant (equally spaced)
Just Below Gear Clamp)

Gear Clamps

1 3/4 in. (44 mm) Flexible
Pipe and Adapter Inner Collar
Overlap

Adapter (SV4.5RF)

Figure 43

Attach Adapter to Appliance
Collar, or Secure Vent Sections

B. Install the Outer Flex Pipe 1. Install the large gear clamp loosely around
the outer flexible vent pipe, push it back out
of the way.
2. Apply a bead of Mill-Pac Black (700° F) high
temperature sealant - Catalog No. 10K81)
to the outer adapter collar; to the grooves
of the collar which extend approximately 1
inch from the end and to the flat surface,
approximately 1-3/8 inches from the end.
3. Pull and extend outer flexible vent pipe.
4. Slide the outer flex pipe over the adapter collar. Ensure the flexible vent pipe completely
engages the adapter collar to a distance of
1-3/8 inches from the end, and that it is free
from damage or tears.
5. Slide the gear clamp down and tighten it
fully to secure the flexible vent to the adapter
outer collar approximately 3/4 inch from the
end of the flex.
6. Install three screws 120 degrees apart
through the flexible vent pipe and into the
adapter collar just below the gear clamp to
provide additional security to the connection.
C. Route Flex Vent Ensure that the flex vent is properly routed to
provide the required clearance. Do not allow the
flexible vent to bend in a radius tighter than 5"
(127 mm). Refer to Figure 44. Space out the
internal flex vent spacers evenly - approximately
every 6 inches - and avoid kinking of inner pipe.
Support horizontal sections of flex with metal
straps at 2 foot (0.61 m) intervals.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Securing Screw
- 3 Places, 120° apart
(equally spaced) Just
Below Gear Clamp

D. Install Firestop / Spacers at ceilings and walls
- When Secure Flex penetrates a wall or ceiling,
a firestop / spacer is required: use the SF4.5 VF
firestop / spacer for ceilings and the SF4.5 HF
firestop / spacer for walls. See the appropriate
sections and Figures shown throughout the venting section for their installation requirements.
Flexible Vent
Section

Figure 44

5” (127 mm)
Radius
Minimum

E. Attach Flex Vent to Termination -
Secure Flex components can be purchased
separately and attached to bulk lengths of Secure Flex flexible tubing cut to size at the job
site. Secure the flexible vent to the Secure Flex
terminations in the same manner (see Figure
43) as it was attached to the adapter.
Note: Secure Flex vent must be attached to Secure
Flex terminations only. DO NOT substitute Secure
Vent terminations or the Secure Vent adapter for
Secure Flex components. The collars of Secure
Flex terminations and adapters have a different
diameter than that used with the Secure Vent
pipe. Additionally, Secure Flex components
have an extended length center tube for use in
attaching the flexible vent.

Step 4. Field Wiring

3. Wire the control within the millivolt control
circuit using the 15 feet of 2 conductor wire
supplied with the unit . Caution: do not
connect the optional wall switch to a 120V
power supply.
4. Alternatively, the appliance may be operated
without the use of the controls indicated in
step 1, solely by manipulating the gas valve
control knob. In order to use this method,
twist the free ends of the two conductor wire
(which would otherwise go to the standard
ON/OFF switch or Optional Switch) together
as shown in Figure 45. Note: Wire is located
inside the control compartment

CAUTION
Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper
and dangerous appliance operation.

CAUTION
Ensure that wires are positioned
away from hot surfaces and sharp
edges.

Note: The supplied 15 feet of 2 conductor wire
has one end of each conductor connected to
the gas valve circuit and the other end of each
conductor placed loose inside the control
compartment.

CAUTION

B. Electronic Wiring (See Figure 47) –

Do not connect the optional wall
switch for burner operation to a
120 Volt AC power supply.

Note: The electronic appliance must be connected to the main power supply.
The junction box is located on the right side of
the appliance. It contains a factory installed and
wired outlet box (duplex receptacle). Also, an
optional field-provided junction box with receptacle may be installed at the front of the control
compartment on either side of the cabinet. See
Figure 46. It will be held in place by a conduit
fitting and locknut (field-provided).

Refer to Section A for millivolt appliances and
Section B for electronic appliances. The gas
valve is set in place and pre-wired at the factory
on both models.
A. SIT and Honeywell Millivolt Wiring
(See Figure 45)
1. Select any of the following optional controls:
appliance-mounted (rocker switch) or wallmounted switch, thermostat, or one of the
optional remote control kits. If appliancemounted ON/OFF control is selected mount
it in the gas valve mounting bracket.
2. If wall-mounted ON/OFF control or thermostat is selected mount it in a convenient
location on a wall near the fireplace.

1. Route a 3-wire 120Vac 60Hz 1ph power supply
to the appliance junction box.
2. If the factory-provided outlet/junction box at
the right rear of the fireplace is being used,
remove the outlet box from the junction box
by removing two screws.

3. Connect the power supply wires (including
the ground supply wire) as shown in Figure
47. (If the field-provided J-box/outlet box is
being used, all of the outlet box wiring must
be field-provided).
4. Locate and install a low voltage (24V) wallmounted switch or thermostat (both fieldprovided)in the desired location.
5. Connect the low voltage wire, located inside
the control compartment, to the wall-mounted
switch or thermostat.
Note: The supplied 15 feet of 2 conductor wire
has one end of each conductor connected to
the gas valve circuit and the other end of each
conductor placed loose inside the control
compartment.
6. Insert the control circuit plug into the unswitched receptacle of the outlet box.
7. After wiring is complete, mount the outlet box
to the J-Box.
Note: The gas valve-mounted ON/OFF switch is
shown in Figure 47. It is integral with the gas
valve and should be set to the ON position.

Step 5. Wiring - Optional Forced Air
Blower Kit
FBK-100, FBK-200 and FBK250 Kits
(See Figure 47) An electrical outlet box (receptacle) is factory
-provided for the installation of the FBK-100,
FBK-200 and FBK-250 forced air blower kits.
(An optional field-provided outletbox/J-Box
may also be used. Electrical power must be
connected to either of these receptacles in order
to operate these blowers. Install the blower
kits according to the installation instructions
provided with the kits.

TH
TP

* Optional
Control Switch

* Twist wires together to operate unit
solely by manipulating the gas valve
control knob; or connect wires to
optional control switch (wall switch,
remote control or wall thermostat to
operate unit.

Thermopile

TH
TP

See Figure 14 on Page 9
for Optional Electrical
Inlet Knockout Location

Schematic
Representation
Only
Field Wired

*Narrow (2 1/8" Wide)
J-Box Required

*Field-Provided
Junction Box
and Duplex
Receptacle

Optional J-Box/Outlet
Box (Left Side Shown)

Figure 46

Factory
• If any of the original wire as supplied must
Wired
be replaced, it must be replaced with Type AWM
105 C - 18 gage wire.
* Optional Kits Installed - ON/OFF wall switch, unit mounted burner ON/OFF switch, wall thermostat or
remote control.receiver.

Figure 45 - Millivolt Wiring Diagram
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Plug blower
into this
receptacle

Green

White

Ground - Green
Neutral - White
120 VAC - Black

Black

Junction Box

Blower

Ground

* Wall-mounted
ON/ OFF Blower
Switch or Variable
Speed Control Switch.

Tab
Broken

Tab Intact

Red
Green
Ground
Screw

View A
J-Box Wiring when
using unit mounted
relay module.

J-BOX WIRING FOR
WALL SWITCH
BLOWER CONTROL

Hot
Side of
Receptacle

*Sediment
Trap

3/8" NPT x 1/2" x 3/8" Flare
Flare Fitting Shut-off Valve

3"
Min

3/8" Nipple
3/8" Union

3/8" Flex Tubing
1/2" x 3/8"
Reducer

Gas
Stub

3/8" Close Nipple
3/8" Shut-off Valve
*A Sediment Trap is recommended to prevent moisture
and debris in gas line from damaging the valve.
Note:The gas supply line must be installed in accordance with building codes by a qualified installer
approved and/or licensed as requed by the locality.
In the Commonwealth of Massachusetts, installation must be performed by a licensed plumber or
gas fitter.

Relay Module C/W FBK-250 only. Plug blower
into J-Box receptacle for FBK-100 or FBK-200
application. See View A for J-Box wiring.

120 VAC

BK
W
G

Neutral
Side of
Receptacle

Gas Flex Line Connector

Gas
Valve

Figure 48 - GAS CONNECTION

Optional Blower

Junction Box

*OFF/ON Switch
(Integral with
Gas Valve)

Pilot Burner
Assembly

Step 6. Connecting Gas Line

Honeywell
Electronic
Gas
Valve
Igniter
Connector
BL
BL

Transformer

R
BK

Optional Control Switch

Schematic Representation Only

GROUND

24 V
Secondary

120 VAC
Primary

BK = BLACK BL = BLUE
R = RED
W = WHITE
G = GREEN

Field Wired
Factory
Wired

* Leave the OFF/ON switch, which is
integral with the gas valve, in the ON
position.
**Optional Control Switches: Wall
Switch, Wall Thermostat or Remote
Control Receiver.
Notes:
1. If any of the original wire as supplied
must be replaced, use Type AWM 105°C
- 18 gage wire ONLY.
2. 120 VAC, 60 Hz - Less than 3 Amps.
Caution: label all wires prior to
disconnection when servicing controls.
Wiring errors can cause improper and
dangerous operation.

Electronic Wiring Diagram (Honeywell) Showing Blower Wiring for Optional FBK-100, FBK-200 & FBK-250 Kits

Figure 47

CAUTION
Ground supply lead must be connected to the wire attached to the green
ground screw located on the outlet box. See Figure 47. Failure to do so
will result in a potential safety hazard. The appliance must be electrically
grounded in accordance with local codes or, in the absence of local codes,
the National Electrical Code, ANSI/NFPA 70-latest edition. (In Canada, the
current CSA C22-1 Canadian Electrical Code).

Make gas line connections. All codes require a
shut-off valve mounted in the supply line. Figure
48 illustrates two methods for connecting the
gas supply. The flex-line method is acceptable
in the U.S., however, Canadian requirements
vary depending on locality. Installation must
be in compliance with local codes.
These appliances are equipped with a gas flex
line for use (where permitted) in connecting
the appliance to the gas line. A gas flex line
is provided to aid in attaching the direct vent
appliance to the gas supply. The gas flex line
can only be used where local codes permit.
See Figure 48 for flex line description. The flex
line is rated for both natural gas and propane
gas. A manual shut off valve is also provided
with the flex line.
The incoming gas line should be piped into
the valve compartment and connected (see
Figures 48 & 49). The millivolt control
valve has a 3/8" (10 mm) NPT thread
inlet port. The electronic control valve
has a 1/2" (13 mm) NPT thread inlet port
and is fitted with a 1/2" x 3/8" (13 mm x
10 mm) NPT fitting.
Secure all joints tightly using appropriate
tools and sealing compounds (ensure propane
resistant compounds are used in propane
applications).
Optional: Seal around the gas line to prevent cold air leakage.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

TEST ALL CONNECTIONS FOR GAS LEAKS
(FACTORY AND FIELD):

WARNING

Reinstalling Control Compartment Door:
To reinstall, insert the hook catches on each
side of the door into the corresponding slots
in the control compartment opening, then
gently push forward and slide down until it
locks in place.

Never use an open flame to
check for leaks.
Turn on gas supply and test for gas leaks using a
gas leak test solution (also referred to as bubble
leak solution). Note: Using a soapy water solution
(50% dish soap, 50% water) is an effective leak
test solution but it is not recommended, because
the soap residue that is left on the pipes/fittings
can result in corrosion over time.
A. Light the appliance (refer to the lighting
instructions label in control compartment or
homeowner's manual).
B. Brush all joints and connections with the gas
leak test solution to check for leaks. If bubbles
are formed, or gas odor is detected, turn the
gas control knob (off/pilot/on) to the “OFF”
position. Either tighten or refasten the leaking
connection, then retest as described above.
C. When the gas lines are tested and leak free be
sure to rinse off the leak testing solution,
D. Turn on burner then observe the individual
tongues of flame on the burner. Make sure
all ports are open and producing flame evenly
across the burner. If any ports are blocked, or
partially blocked, clean out the ports.

CONTROL COMPARTMENT ACCESS /
LOUVER PANEL INSTRUCTIONS (Ref.
Figure 49 )
NOTE: The top louvered panel and the bottom
louvered control panel door remove and install
the same way as follows:
The gas controls can be found behind the control
compartment access door.
Removing Control Compartment Door:
Open the door by gently lifting it upward until
the hook catches on both sides clear the locating
slots. Then pull door out to remove.
On millivolt systems, the piezo igniter, HI/LO
flame adjustment knob, and pilot and main
gas OFF/ON control knob are located below
the glass panel enclosure. The gas valve for
electronic systems is also located below the
glass enclosure panel. See Figure 50.

OPENING CONTROL
COMPARTMENT DOOR

Observe the individual tongues of flame on
the burner. Make sure all ports are open and
producing flame evenly across the burner. If
any ports are blocked, or partially blocked,
clean out the ports.

Lift the Lower Control
Compartment Door
up and pull out to
remove.

SIT Gas Valve

Hook Catch

Control Valve

Out
Up

Shown with control
compartment door
removed

Lower Control
Compartment Door

Figure 49
Step 7. Checking Appliance Operation
With the gas line installed, run initial system
checkout before closing up the front of the
appliance. Follow the pilot lighting instructions
provided in the Homeowner's Care and Operation Instructions. For piezo igniter location see
Figure 50 (millivolt appliances only).

Piezo Igniter

Honeywell
Gas Valve

Sit and Honeywell Millivolt Gas Valve
Showing Piezo Igniter Location (Each Unit is
Equipped with Only One of these Gas Valves)

Figure 50
SIT MILLIVOLT PILOT ASSEMBLY
Proper Pilot Flame Appearance
Igniter Rod
Hood

Thermocouple
3/8" Min.
(9 mm)

Note: The (pull-out) Lighting instructions label
can be found in the control compartment
(see Figure 50).
When first lighting the appliance, it will take
a few minutes for the line to purge itself of
air. Once purging is complete, the pilot and
burner will light and operate as indicated in
the instruction manual. Subsequent lightings
of the appliance will not require such purging.
Inspect the pilot flame.

Pilot
Nozzels

Figure 51

Thermopile

Replace logs if removed for pilot inspection.

SIT and Honeywell Millivolt Appliance
Checkout

To light the burner; turn “ON” the remote wall
switch and rotate the gas valve control knob
counterclockwise to the “ON” position.

The pilot flame should be steady, not lifting
or floating. Flame should be blue in color with
traces of orange at the outer edge.

HONEYWELL MILLIVOLT PILOT ASSEMBLY

The top 3/8" (10 mm) at the pilot generator
(thermopile) and the top 1/8" min (tip) of the
quick drop out thermocouple should be engulfed
in the pilot flame. The flame should project 1" (25
mm) beyond the hood at all three ports (Figure
51 - SIT, Figure 52 - Honeywell )
To light the burner; rotate the gas valve control
knob counterclockwise to the “ON” position
then turn “ON” the OFF/ON switch (installed
at Step 4).

Proper Pilot Flame Appearance
1/8" Min.
(3 mm)

3/8" Min.
(9 mm)

Pilot
Nozzels

Figure 52

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Thermocouple
Igniter Rod
Hood

Thermopile

Electronic Appliance Checkout

To light the burner, turn ‘ON’ the optional remote
wall switch and turn the gas control switch to
the “ON” position. Ensure the Igniter lights the
pilot. The pilot flame should engulf the flame
rod as shown in Figure 53.
ELECTRONIC PILOT ASSEMBLY
Proper Pilot Flame Appearance
Proper Flame
Adjustment
Pilot
Nozzels

3/8" to 1/2"
(9 -13 mm)

Ground
Electrode
Flame Rod
Hot Surface
Igniter

Figure 53
Step 8. INSTALL VERMICULITE, VOLCANIC STONE, GLOWING EMBERS AND
LOGS

1. Remove the front glass enclosure panel
(see Removing Glass Enclosure Panels on
Page 31).
2. Remove log set box from firebox. Next,
remove embers and vermiculite from control
compartment. Handle logs carefully to prevent
breakage.
3. Install Vermiculite - Place some vermiculite
on the firebox floor around the burner (the
entire bag of vermiculite will NOT be used).
See Figures 55 & 56. DO NOT PLACE ANY
VERMICULITE ON THE BURNER. Mound
up a portion of the vermiculite in front of the
burner.
4. Install decorative volcanic stone - Sprinkle
the decorative volcanic stone (dark colored)
on top of the vermiculite (light colored) in a
pleasing pattern (see Figures 55 & 56).
5. Placement of Glowing Embers Separate the Embers (rockwool) into pieces
about the size of a quarter (see Figure 54).
Keep the pieces fluffed up, not matted. Distribute these pieces over the surface of the
burner, as shown in Figures 55 & 56. Do not
use more than is necessary. Ensure that the
main burner slots remain uncovered by the
ember material.
Note: This appliance is provided with enough
Glowing Embers for several applications, do
not use all that is in a new bag at one time. For
best glowing effect, replace the ember material
annually.
6. Placement of Logs and Twigs All logs that have locating notches or slots to help
ensure that they are properly positioned. All top
logs that rest on lower logs, do so over notches,
indents or pins. Proper twig placement is critical
to prevent sooting. Twigs should be placed in
the gaps between the flame peaks and should be
positioned so they do not impinge the flames.

LMDV-3328 & LMDV-3530 - Install as Follows
Carefully position the ceramic fiber logs and twigs
over the burner as shown in Figure 55. Logs
should be placed in the order shown and per the
following instructions.
1. Place the rear log (A) as shown. Position
the 2 notches on the bottom of the log over the
2 corresponding locating brackets against the
back wall of firebox.
2. Place the left log (B) as shown. The notch
on the bottom of the log should fit over the
corresponding locating bracket.
3. Place the right log (E) as shown. The hole
on the back of the log should fit over the corresponding pin on the rear log (A). Make sure
that the log is positioned so it aligns to the sides
of the gas ports on the corner of the burner.
4. Place the left center log (C) as shown. The
forked end of the log fits into the corresponding
notch on rear log (A). The slot on the other
end (bottom) of log fits over the corresponding
locating bracket on the sub-floor.
5. Place the right center log (D) as shown. One
end of the log fits into the corresponding indent
on the right log (E). The slot on the other end
(bottom) of log fits over the corresponding
locating bracket on the sub-floor.
LMDV-4035 - Install as Follows
Carefully position the ceramic fiber logs and twigs
over the burner as shown in Figure 56. Logs
should be placed in the order shown and per the
following instructions.
1. Position the center log (C) onto the 2 corresponding location pins on the burner.
2. Place the rear log (A) as shown. Position
the 2 notches on the bottom of the log over the
2 corresponding locating brackets against the
back wall of firebox.
3. Place the left log (B) as shown. The notch
on the bottom of the log should fit over the
corresponding locating bracket.
4. Place the right log (E) as shown. The notch
on the bottom of the log should fit over the
corresponding locating bracket. Make sure that
the log is positioned so it aligns to the sides of
the gas ports on the corner of the burner.
5. Place the center front log (D) as shown. The
slot in the bottom of the log fits over the corresponding location bracket on the sub-floor.

WARNING
DO NOT attempt to install the logs
until the appliance installation
has been completed, the gas line
connected and tested for leaks
and the initial burner operation
has been checked out.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

WARNING
The size and position of the log
set was engineered to give the
appliance a safe, reliable and
attractive flame pattern. Any
attempt to use a different log
set in the fireplace will void
the warranty and will result in
incomplete combustion, sooting, and poor flame quality.

WARNING
This appliance is not designed
to burn wood. Any attempt to
do so could cause irreparable
damage to appliance and prove
hazardous to your safety.

WARNING
If logs are not installed according
to the log installation instructions, flame impingement and
improper combustion could
occur and result in soot and/or
excessive production of carbon
monoxide (CO), a colorless,
odorless, toxic gas.
Glowing Embers
Separate into Quarter
Size (separate) Pieces

Bag of Glowing
Embers (rockwool)

Figure 54
REFERENCE
Firebox Accessories / Parts
Cat. No.

Model No.

88L53

FGE

Table 13

Bag of Glowing Embers
(1 oz. rockwool)
Vermiculite, Bag (2 liters)

H3696
80L42

Description

FDVS

Bag of Decorative
Volcanic Stone

MODEL LMDV-3328 & LMDV-3530
Log Placement Instructions
A

LOG SET
Catalog Number H3366
* Item

Description

Log, Rear

Log, Left

Log, Left Center

Log, Right Center

Log, Right

* Item "letters" above correspond to photos

Install the Embers, Vermiculite, Volcanic Stone and Logs in the order
shown here (1 through 6) and per the instructions on Page 26.

DO NOT PLACE EMBERS OVER BURNER SLOTS

Embers

Hole on back
of log (E) fits
over pin on
log (A).

Volcanic
Stone

V-Shape area of log (E) should
align to sides of burner slots
Vermiculite

The 2 notches on log bottom rest on locating brackets

Log (C) fits into
indent in Log (A)

Notch

C
Slot on bottom of Log
(C) fits over bracket

3
6

Log (D) fits
into indent
on Log (E)

Slot fits over bracket.

E
Slot on bottom of Log
(D) fits over bracket

Figure 55
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

MODEL LMDV-4035
Log Placement Instructions
LOG SET
Catalog Number H3365
* Item

Description

Log, Rear

Log, Left

Log, Center

Log, Center Front

Log, Right

C
B
E

* Item "letters" above correspond to photos

Install the Embers, Vermiculite, Volcanic Stone and Logs in the order
shown here (1 through 6) and per the instructions on Page 26.

DO NOT PLACE EMBERS OVER BURNER SLOTS

Embers

Volcanic
Stone

Vermiculite

B
Notch on log bottom
fits over bracket

Place log over pins

C
5
Pin

3
The 2 notches
on log bottom
rest on locating
brackets

A
Notch

Notch

Notch on log bottom
fits over bracket

D
Slot on bottom of Log
(D) fits over bracket

Figure 56
28

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Step 9. Installing the Glass Door

WARNING
Do not operate appliance with the
glass front removed, cracked or
broken. Replacement of the glass
should be done by a licensed or
qualified service technician.

WARNING
Do not attempt to substitute the
materials used on this door, or
replace cracked or broken glass
with any materials other than
those provided by the appliance
manufacturer.

Installing Glass Enclosure Panels
(see Figure 57)
1. Visually inspect the gasket on the backside of the
glass panel. The gasket surface must be clean,
free of irregularities and seated firmly.
2. Position the glass enclosure panel in front of
the firebox opening at a 45 degree angle and
engage the top flange over the lip at the top
of the firebox opening. See Figure 57.
3. Swing the glass enclosure panel down and
back. Ensure the gasket seats evenly as the
panel draws shut. Engage the Vee-flange at
the bottom of the panel with the latches and
close the latches to secure the panel.
4. Reinstall top louver assembly and control
compartment door see installation instructions on Page 25, Reinstalling Control
Compartment Door).
Top Flange on
Glass Door
Glass Door

WARNING
Handle this glass with extreme
care! Tempered glass is susceptible to damage – do not scratch
or handle roughly while reinstalling the glass door frame.

WARNING
Do not attempt to touch the front
enclosure glass with your hands
while the fireplace is in use.
Removing Glass Enclosure Panels
(see Figure 57)
1. Remove the top louver assembly by gently
lifting it upward until the hook catches on
boths sides clear the locating slots. Then
pull door out to remove.
2. Remove the control compartment access door
the same way as described in Step 1 above.
3. Locate the two (2) latches at the top of the
control compartment. To disengage the two
latches from the bottom vee-flange of the
glass enclosure panel, reach for the handles
located towards the back of the latches and
pull the handles down toward the front of
the appliance.
4. Swing the bottom of the door out and raise
it slightly to lift the top flange of the door
frame away from the appliance.

• If there is smoke or soot present, first check
the log set positioning to ensure that the
flames are not impinging on any of the logs.
If the log set is properly positioned and a
sooting condition still exists, then the air
shutter opening should be increased.
• The more offsets in the vent system, the larger
the air shutter opening will need to be.
• An appliance operated with the air shutter
opened too far, may have flames that appear
blue and transparent. These weak, blue and
transparent flames are termed anemic.
• Propane models may exhibit flames which
candle or appear stringy. If this is present
and persists, adjust the air shutter to a more
closed position, then operate the appliance
for a few more minutes to ensure that the
flame normalizes and the flames do not
appear sooty.
The following chart is provided to aid you in
achieving the correct air shutter adjustment
for your installation.
Air Shutter Adjustment Guidelines:
Amount of
Primary Air

WARNING
The glass door of this appliance must only be replaced as a
complete unit as provided by the
manufacturer. Do not attempt to
replace broken, cracked or chipped
glass separately.

Air Shutter Adjustment Guidelines

Bottom Vee-flange
Glass Door

Firebox Floor
Glass Door Latch

Figure 57 - INSTALLING GLASS DOOR
Step 10. Burner Adjustments
Flame Appearance and sooting

Proper flame appearance is a flame which is
blue at the base and becomes yellowish-orange
in the body of the flame. When the appliance
is first lit, the entire flame may be blue and will
gradually turn yellowish-orange during the first
15 minutes of operation. If after a short period
the flame stays lowered blue, or if the flame is
orange with evidence of sooting (black tip), the
air shutter opening may need to be adjusted.
If the air shutter openings closed too far, sooting
may develop. Sooting is indicated by black puffs
developing at the tips of very long orange flames.
Sooting results in black deposits forming on the
logs, appliance inside surfaces and on exterior
surfaces adjacent to the vent termination. Sooting is caused by incomplete combustion in the
flames and lack of combustion air entering the
air shutter opening. To achieve a warm yellowish-orange flame with an orange body that does
not soot, the shutter opening must be adjusted
between these two extremes.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Flame
Color

Air Shutter
Adjustment

If air shutter is
closed too far

Flame will
be orange

Air shutter
gap should be
increased

If air shutter is
open too far

Flame will
be blue

Air shutter
gap should be
decreased

WARNING
Air shutter adjustment should only
be performed by a qualified professional service technician.

WARNING
Ensure front glass panel are in
place and sealed during adjustment.

CAUTION
Carbon will be produced if the air
shutter is closed too much. Any
damage due to carboning resulting from improperly setting the
air shutter is not covered under
the warranty.

Burner Air Shutter Adjustment Procedure

CAUTION
The air shutter door and nearby appliance surfaces are
hot. Exercise caution to avoid injury while adjusting
flame appearance.
Burner Air Shutter Adjustment Procedure

1. Locate adjustment rod and adjust air shutter to the standard setting
as shown in Figure 60 (adjustment rod is located in the lower control
compartment).
Note: Move the adjustment rod down to decreases air and up to
increases.
2. Light appliance (follow lighting procedure on lighting label in control
compartment or see homeowners manual).
3. Allow the burner to operate for at least 15 minutes while observing the
flame continuously to ensure that the proper flame appearance has
been achieved (see Figures57 or 58). If the following conditions are
present, adjust accordingly.
• If flame appears weak or sooty, adjust the air shutter, incrementally, to a more open position until the proper flame appearance
is achieved.
• If flame stays lowered blue, adjust the air shutter, incrementally,
to a more closed position until the proper flame appearance is
achieved.

4. Leave the control knob (off/pilot/on) in the ON position and the burner
OFF/ON switch OFF (& remote switches, if applicable).
5. When satisfied that the burner flame appearance is normal, re-install
the lower control compartment door then proceed to finish the installation.
Adjustment Set-Screw
Adjustment
Rod Up
(Fully Open
Position)

Burner
Tube
Air Shutter
Adjustment Rod Down min.
air opening position)

Ref. Air shutter Patent:
U.S. Pat. 5,553,603

Main Burner Factory Air Shutter
Opening Setting - Inches (millimeter)
Model

Nat.Gas

Propane Gas

LMDVT-3328

1/16 (1.58)

1/4" (6.35)

LMDVR-3328

1/16 (1.58)

1/4" (6.35)

LMDV-3530

1/16(1.58)

5/16" (7.94)

LMDV-4035

1/8 (3.18)

3/8" (9.53)

Figure 60 - Burner Air Shutter Adjustment
Step 11. Hood Installation

(Refer to Figure 61) All of these appliances must have hoods installed
prior to operating.
Install hood by sliding it into the slots on the lower edge of the cabinet top.

Finishing Requirements - Wall Details

Complete finished interior wall. To install the appliance facing flush with
the finished wall, position framework to accommodate the thickness of
the finished wall (Figure 61 ).

See Page 4 for Cold Climate Insulation
and Page 7 for Clearances
Figure 58- Burner Flame Appearance Model LMDV-3328 & LMDV-3530
This Area Must
Remain Clear of
Combustible
Materials

Combustible Finished
Wall Materials

1 in. Min.
(25 mm)
Top Spacers

Drywall Bracket / Spacer
Combustible material may
touch the appliance top

Top of Appliance
Louvers
Top of Door Frame

Hood must be installed as shown.

Figure 59 - Burner Flame Appearance Model LMDV-4035
30

Figure 61 - Combustible Wall Framing

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

3"
(76 mm)

Installation Accessories
Item
1

Cat. No.
H1968

Model
SV4.5HT-2

H2152

SV4.5CGV-1

H4687

SV4.5CTS

Description
Horizontal Square Termination With Firestop / spacer
(H2246) & Adapter (74L61)

Vertical Termination Cap
Chase Top Termination Square

H4716

SV4.5CTS-B

Chase Top Termination Square, Black

H4717

SV4.5CTS-TC

Chase Top Termination Square, Terra Cotta

77L70

SV4.5L6

6 Inch (152 mm) Vent Section

77L71

SV4.5L12

12 Inch (305 mm) Vent Section

77L72

SV4.5L24

24 Inch (610 mm) Vent Section

77L73

SV4.5L36

36 Inch (914 mm) Vent Section

77L74

SV4.5L48

48 Inch (1219 mm) Vent Section

77L75

SV4.5LA

Telescopic Section (1-1/2" to 7-1/2" effective length)

77L76

SV4.5E45

45 Degree Elbow

77L77

SV4.5E90

90 Degree Elbow

The following flashings come packaged with a storm collar:
6

77L78

SV4.5F

Flat Roof Flashing

77L79

SV4.5FA

1/12 to 7/12 Adjustable Flashing

77L80

SV4.5FB

7/12 to 12/12 Adjustable Flashing

77L81

SV4.5SC6

Storm Collar (6 per box)

H2246

SV4.5HF

Firestop / Spacer-Horizontal (3-1-1 spacing), 10 Pack

H2247

SV4.5VF

Firestop / Spacer-Vertical (1-1-1 spacing), 10 Pack

96K93

SV4.5SU

H5816

SV4.5-TWSK

Support Strap

96K92

SV4.5SP

12A

17M52

SV4.5HGS-1

Termination Guard, Square (1 pack)
(for square termination)

12A

17M53

SV4.5HGS-12

Termination Guard, Square (12 pack)
(for square termination)

12B

87L02

SV4.5HGS

12C

H5820

4.5HTSK

Through Wall Shield Kit
(used to shield the direct-vent pipe from blown insulation)

Support Plate

12A

Termination Guard for Square Termination (Deluxe)
(1 pack) (for square termination)
Termination Shroud (Guard) for Horizontal Square Termination
(1 pack)
Ref. 750,109M

12B

Ref. 750,055M

12C

Ref. 750,207M
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Ref. 750,246M

INSTALLATION ACCESSORIES
Item

Cat. No.

Model

Description

H1969

SF4.5HT-2

Horizontal Square Termination (without flex)

77L87

SFKIT12S

Flex Square Term. (with 12 inch [305 mm] * compressed flex)

77L88

SFKIT18S

Flex Square Term. (with 18 inch [457 mm] * compressed flex)

77L89

SFKIT24S

Flex Square Term. (with 24 inch [610 mm] * compressed flex)

77L90

SFKIT36S

Flex Square Term. (with 36 inch [914 mm] * compressed flex)

77L91

SFKIT48S

Flex Square Term. (with 48 inch [1219 mm] * compressed flex)

56L74

SFVT30

Vertical Termination for flex (flat to 6/12) with flex adapter, section of rigid vent,
roof support collar assembly, roof flashing and storm collar.

56L75

SFVT45

Vertical Termination for flex (6/12 to 12/12) with flex adapter, section of rigid
vent, roof support collar assembly, roof flashing and storm collar.

*20

60L10

SF-18

*20

98K03

SF-12

12 ft. (3.66 m) * compressed flex

10K81

SFMP

Mill-Pac, Black, High Temperature Sealant

89L40

SFMP-12

Mill-Pac, Black, High Temperature Sealant - Bulk 12 pack

91L66

SF-GC4-6

Gear Clamp 4.5 in. (114 mm) for flex (6 pieces)

SF-GC7-6

Gear Clamp 7.5 in. (190.5 mm) for flex (6 pieces)

18 ft. (5.49 m) * compressed flex

91L67

99L02

SV4.5HRK14 Horizontal Riser Kit, 14"

99L03

SV4.5HRK36 Horizontal Riser Kit, 36"

H1988

CTSA-33

Chase Top Shroud Kit, Arch Top 3 X 3

H1985

CTSO-33

Chase Top Shroud Kit, Open Top 3 X 3

H1987

CTSO-44

Chase Top Shroud Kit, Open Top 4 X 4

H1986

CTSO-46

Chase Top Shroud Kit, Open Top 4 X 6

H2248

SF4.5HF

Firestop / Spacer - Horizontal (flex) (3-1-1 spacing), 10 Pack

H2249

SF4.5VF

Firestop / Spacer - Vertical (1-1-1 spacing), 10 Pack

* All compressed flex vents

expanded up to two times.

can be

1 typ.

CTSO-46 Chase Top
Shroud for double
terminations

26
2a
2b

2a
2b

D
A

Ref. Form #750,193M

Ref. Form #750,194M

1 typ.

2 typ.

Arch Top, Chase Top Shroud

Inches (millimeters)

Model

CTSA-33

34"
(864)

5"
(127)

34"
(864)

34"
(864)
CTSO-33/44 Chase
Top Shrouds for Single
terminations

Open Top, Chase Top Shroud
Inches (millimeters)

Sea
l

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Model

CTSO-33

37-5/8
(955)

7-1/2
(191)

24-1/2
(622)

3
(76)

CTSO-44

48-5/8
(1235)

7-1/2
(191)

24-1/2
(622)

3
(76)

CTSO-46

48-5/8
(1235)

73 1/4
(1860)

7-1/2
(191)

24-1/2
(622)

3
(76)

INSTALLATION ACCESSORIES
Listed Secure Flex™ Components
LMDV-3328 & LMDV-3530 Models Only
Cat. No.

Model

94L04

SFKIT12SS

Flex - Small Square Termination with 12 in. (305 mm) of *compressed flex vent

Description

94L05

SFKIT18SS

Flex - Small Square Termination with 18 in. (457 mm) of *compressed flex vent

94L06

SFKIT24SS

Flex - Small Square Termination with 24 in. (610 mm) of *compressed flex vent

94L07

SFKIT36SS

Flex - Small Square Termination with 36 in. (914 mm) of *compressed flex vent

94L08

SFKIT48SS

Flex - Small Square Termination with 48 in. (1219 mm) of *compressed flex vent

94L09

SF-HTSS

Horizontal Small Square Termination without flex vent

Listed Secure Vent™ Components - LMDV-3328 & LMDV-3530 Models Only
94L10

SV4.5HTSS

Horizontal - Small Square Termination with Firestop/Spacer (H2246) & Adapter (74L61).

98L27

SV4.5HTSSL

Long Horizontal - Small Square Termination with Firestop/Spacer (H2246) & Adapter (74L61). 1 PACK

98L28

SV4.5HTSSL8

Long Horizontal - Small Square Termination with Firestop/Spacer (H2246) & Adapter (74L61). 8 PACK

* All compressed flex vents can be expanded up to two times.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Gas Conversion Kits
Millivolt SIT Systems
Natural Gas To Propane Gas
Conversion Kits

WARNING
Millivolt HONEYWELL Systems
Propane Gas To Natural Gas
Conversion Kits

Cat. No.

Models

Cat. No.

LMDVT-3328
LMDVR-3328

H2009

LMDVT-3328
LMDVR-3328

26M55

LMDVT-3530

H2011

LMDVT-3530

26M56

LMDVT-4035

H2013

LMDVT-4035

26M57

Models

Millivolt SIT Systems
Propane to Natural Gas
Conversion Kits

Electronic HONEYWELL Systems
Natural Gas To Propane Gas
Conversion Kits

Models

Cat. No.

Models

Cat. No.

LMDVT-3328
LMDVR-3328

H2010

LMDVT-3328
LMDVR-3328

26M59

LMDVT-3530

H2012

LMDVT-3530

26M60

LMDVT-4035

H2014

LMDVT-4035

26M61

Millivolt HONEYWELL Systems
Natural Gas To Propane Gas
Conversion Kits

Electronic HONEYWELL Systems
Propane Gas To Natural Gas
Conversion Kits

Models

Cat. No.

Models

Cat. No.

LMDVT-3328
LMDVR-3328

26M51

LMDVT-3328
LMDVR-3328

26M63

LMDVT-3530

26M52

LMDVT-3530

26M64

LMDVT-4035

26M53

LMDVT-4035

26M65

This conversion kit shall be installed
by a qualified service agency in
accordance with the manufacturer's
instructions and all applicable codes
and requirements of the authorized
having jurisdiction. If the information
in these instructions is not followed
exactly, a fire, explosion or production of carbon monoxide may result
causing property damage, personal
injury or loss of life. The installation
is not proper and complete until the
operation of the converted appliance
is checked as specified in the owner
instructions supplied with the kit. The
qualified service agency performing
this installation assumes responsibility for this conversion.

AVERTISSEMENT
Cet équipement de conversion sera
installé par une agence qualifiée de
service conformément aux instructions du fabricant et toutes exigences
et codes applicables de l'autorisés
avoir la juridiction. Si l'information
dans cette instruction n'est pas suivie
exactement, un feu, explosion ou production de protoxyde de carbone peut
résulter le dommages causer de propriété, perte ou blessure personnelle
de vie. L'agence qualifiée de service
est esponsable de l'installation propre
de cet équipment. L'installation
n'est pas propre et compléte jusqu'à
l'opération de l'appareil converti est
chéque suivant les critères établis
dans les instructions de propriétaire
provisionnées avec l'équipement.

IMPORTANT/CANADA
The conversion shall be carried out
in accordance with the requirements
of the provincial authorities having
jurisdiction and in accordance with
the requirements of the CAN1-B149.1
And B149.2 Installation code.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

IMPORTANT
LE CANADA SEULEMENT

Kit part numbers are listed here and the following
steps detail the conversion procedure.
Step 1. Turn off the gas supply to the appliance.
Remove the front glass door/frame from the
appliance. Access the control compartment.
Step 2. Carefully remove the logs. Exercise care
so as not to break the logs.

a. See Figure 62 and the instructions
provided with the kit. Using a Torx T20,
tool or or standard flat screwdriver remove
and discard the three pressure regulator
mounting screws. Remove the pressure
regulator, spring, poppet, diaphragm and
bushing. Discard all removed components.
Ensure the rubber gasket installed on the
back of the replacement pressure regulator
is properly positioned and install the new
pressure regulator using the new screws
supplied with the kit. Tighten screws to 25
In. lb. torque.

Note - The orifice strip tab may be randomly
located on any side of the hex fitting.

b. Attach manometer to the manifold side
pressure test fitting and verify manifold
pressure reads 3.5 inches water column (0.87
kPa) for natural gas, and 10.0 inches water
column (2.49 kPa) for propane gas.
c. Refer to Figure 63 and remove the pilot hood
assembly to access the hexed pilot orifice.
Remove and replace the orifice with the one
provided with the kit.

d. Push the orifice strip tab all the way
against the hex fitting to align the appropriate gas type orifice (see Figures 65 & 66).
The type of gas for which the pilot is set,
is, the gas type shown on the tab.
e. Retighten, clockwise, the pilot hex
fitting until the pilot hood aligns with the
thermocouple and thermopile as indicated
by the arrows shown in Figure 66.

Step 5. Millivolt Appliances
Honeywell Systems a. Convert the gas valve as follows
(see Figure 64 ): Remove the plastic protecting cap. Remove the gas type setting screw
by turning it counterclockwise. Obtain the
replacement gas type setting screw from the
kit and screw it into place (red for propane
and blue for natural gas). Tighten the gas type
setting screw by turning it clockwise. Replace
the plastic protecting cap.

Pilot for Honeywell Millivolt Gas Valve
Orifice Strip Tab Position Identification
For LP (propane gas) and Natural Gas
LP (propane) Gas Position - 1/16 inch hole,
LP and red color shown
on tab.

Step 4. Millivolt Appliances - SIT Systems

Figure 63

Step 3. Locate the screws securing the burner
assembly to the appliance. Remove the burner
assembly and retain the securing screws.

Use a 7/16" open end wrench and turn the
pilot hex fitting counter-clockwise 1/4 turn.
(See Figure 66).

Pilot
Orifice

Honeywell Millivolt Gas Valve
T

Gas conversion kits are available to adapt the
appliance from the use of one type of gas to
the use of another. These kits contain all the
necessary components needed to complete the
task including labeling that must be affixed to
ensure safe operation.

Note - Use extra care not to engage the
orifice strip with the 7/16" open end wrench
(contacting the orifice strip could cause strip
distortion rendering the pilot inoperative).
Also avoid wrench contact to any of the
other pilot parts.

Top View of Hex Fiting and Orifice Strip Tab

Figure 65
Adjusting Knob
Regulator Cap

SIT Millivolt Gas Valve

Conversion screw
(blue natural gas;
red LP/propane gas)

Pilot for Honeywell Millivolt Gas Valve
(Loosening of Hex Fitting For
Orifice Strip Tab Positioning)
Hood

Figure 64
Pressure
Regulator

Remove
These
Components

Figure 62

Natural Gas Position
- NAT shown on tab.

La conversion devra être effectuée
conformément aux recommandations des autorités provinciales
ayant juridiction et conformément
aux exigences du code d'installation
CAN1-B149.1 ET.2.

Pilot for
SIT Millivolt
Gas Valve

b. Attach manometer to the manifold side
pressure test fitting and verify manifold
pressure reads 3.5 inches water column
(0.87 kPa) for natural gas, and 10.0
inches water column (2.49 kPa) for propane gas.
c. Convert the pilot orifice as follows (see
Figures 65 & 66 ):

Hood
Alignment

7/16 in. Open
End Wrench

Orifice
Strip Tab
Take care not to contact the orifice strip tab
with the hex fitting wrench - distortion of the
tab may render the pilot inoperative.

Figure 66
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Step 6. Electronic Appliances
Honeywell Systems
See Figure 67 and the instructions provided
with the kit. Remove the slotted cap screw,
o-ring, pressure-regulating adjusting screw
and spring. Retain all parts for possible
later use. Install new components from the
kit. Black cap and red spring for propane gas
units. Silver cap and stainless steel spring
for natural gas units.

OFF
ON

CONTROL

Inlet Pressure Test Port
PSI

IGNITE

Manifold
Pressure
Test Port
Slotted
Cap
Adjusting
Screw

Spring

Figure 67

Before installing the cap, attach manometer
to the manifold side pressure test fitting and
adjust screw until pressure reads 3.5 inches
water column (0.87 kPa) for natural gas,
and 10.0 inches water column (2.49 kPa) for
propane gas.
See Figure 68 and replace the pilot orifice
as follows: Remove the Igniter assembly
retainer clip, and carefully remove the Igniter
assembly.
Exercise extreme care to prevent damage to or
breakage of the Igniter assembly. Remove the
screw securing the pilot assembly to its mounting bracket. Back off the flare nut at the end
of the pilot gas line to free the pilot assembly
from the gas line. Remove the pilot orifice
and replace it with the one provided with the
conversion kit. Reinstall the pilot assembly
by reversing the steps detailed here.
When reinstalling the Igniter assembly, use
extreme care to prevent damage and breakage. Do not apply any leverage to the Igniter
assembly while restoring the retainer clip to
its original position.

All Models
Step 7. Remove the burner orifice from the
manifold and replace it with the one provided
with the kit. See Table 14 for orifice sizes
required for use with natural gas or propane
gas. Figure 69 illustrates the orifice.
Burner Orifice Sizes
Elevation 0-4500 feet ( 0-1372 meters)
Model
Series

Natural
Gas

Propane
Gas

drill
sizez(inches)

drill size (inches)

LMDVT-3328
LMDVR-3328

#45 (.082") *
39L66 •

1.2mm (.048") *
99K78 •

LMDV-3530

#44 (.086") *
60J8001 •

#55 (.052") *
19L5201 •

LMDV-4035

#37 (.104") *
24M1001 •

1/16" (.062")*
21L0101 •

* Standard size installed at factory
• Part /Cat. Number

Table 14

Pilot
Assembly

Figure 69

Pilot
Orifice
Ignitor
Assembly

Retaining
Clip

Flare Nut

Note: If the Igniter is damaged, a replacement kit is available - order Catalog Number
87L54.

Step 8. Reassemble all removed components
by reversing the procedures outlined in the
preceding steps. Use pipe joint compound or
Teflon tape on all pipe fittings before installing
(ensure propane resistant compounds are used
in propane applications, do not use pipe joint
compounds on flare fittings).
Step 9. Attach the conversion label provided
in the conversion kit to the rating plate on the
appliance.
Step 10. Turn on gas supply and test for gas
leaks.

Figure 68

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Lennox reserves the right to make changes at any time, without notice, in design,
materials, specifications, prices and also to discontinue colors, styles and products.
Consult your local distributor for fireplace code information.

P/N 850,029M REV. G 05/2008

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

1110 West Taft Avenue • Orange, CA 92865

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.7
Linearized                      : No
Author                          : Provided By MANUALSLIB.COM - http://www.manualslib.com/
Create Date                     : 2012:05:15 07:59:21Z
Keywords                        : manuals, instruction manuals, user manuals, service manuals, user guides, pdf manuals, owners manuals, installation guides
Modify Date                     : 2014:12:07 13:41:43+08:00
Subject                         : Search through 700.000 manuals online & and download pdf manuals.
Has XFA                         : No
XMP Toolkit                     : Adobe XMP Core 5.4-c005 78.147326, 2012/08/23-13:03:03
Format                          : application/pdf
Creator                         : Provided By MANUALSLIB.COM - http://www.manualslib.com/
Description                     : Search through 700.000 manuals online & and download pdf manuals.
Title                           : ManualsLib - Makes it easy to find manuals online!
Creator Tool                    : pdftk 1.44 - www.pdftk.com
Metadata Date                   : 2014:12:07 13:41:43+08:00
Producer                        : itext-paulo-155 (itextpdf.sf.net-lowagie.com)
Document ID                     : uuid:03a96beb-5af6-bf4f-8ca6-905a5baab8a0
Instance ID                     : uuid:1f08ee8e-8aeb-114d-8eb8-a2ec71c7a488
Page Count                      : 36

EXIF Metadata provided by EXIF.tools

Lennox Lmdv 3530Cnm Instruction Manual ManualsLib Makes It Easy To Find Manuals Online!

Navigation menu

Versions of this User Manual:

Views

Navigation