Monessen Hearth Covington Direct Vent KHLDV400 User manual
73D0024 8/09 Rev. 10
730024
KHLDV cover
273D0024
KHLDV Series Gas Fireplace
High Elevations ...................................................... 5
Gas Pressures ....................................................... 5
Gas Specifications & Orifice Size .......................... 5
Before You Start ..................................................... 7
Fireplace Framing .................................................. 7
Fireplace Location .................................................. 8
Installation Precautions .........................................11
Installation Clearances ..........................................11
Installation Planning ............................................. 12
Vertical Termination .............................................. 12
Horizontal Termination ......................................... 12
How to Use a Vent Graph .................................... 14
Vertical/Horizontal Termination Configurations .... 15
Below Grade Installation ...................................... 17
Vertical Through-the-Roof Applications ................ 18
Installation for Vertical Termination ...................... 19
Check Gas Type................................................... 21
Install Gas Piping ................................................ 21
Electrical Wiring ................................................... 23
Lighting Pilot for the First Time ............................ 27
Lighting Pilot ........................................................ 28
Lighting Burner ..................................................... 29
To Turn Off Gas .................................................... 29
Operating Instructions .......................................... 36
To Turn Off Gas .................................................... 36
Remote Control Operation ................................... 40
Hearth Brick Placement ....................................... 44
Rockwool Placement ........................................... 44
Log Placement ..................................................... 45
Burner, Pilot and Control Compartment ............... 48
Pilot Flame ........................................................... 48
Burner Flame ....................................................... 48
Venting System .................................................... 49
Glass Door ........................................................... 49
Logs ..................................................................... 49
Rock Wool ........................................................... 49
Firebox Components ............................................ 53
Standing Pilot Millivolt Control ............................ 54
Signature Command System ............................... 56
Venting Components ............................................ 58
Logs ..................................................................... 60
73D0024 3
KHLDV Series Gas Fireplace
4. Never install the fireplace
• in a recreational vehicle
• where curtains, furniture, clothing, or other flam-
mable objects are less than 42" from the front, top,
or sides of the fireplace
• in high traffic areas
• in windy or drafty areas
5. This fireplace reaches high temperatures. Keep children
and adults away from hot surfaces to avoid burns or
clothing ignition. Fireplace will remain hot for a time after
shutdown. Allow surfaces to cool before touching.
6. Carefully supervise young children when they are in
the room with fireplace.
7. Do not modify fireplace under any circumstances. Any
parts removed for servicing must be replaced prior to
operating fireplace.
8. Turn fireplace off and let cool before servicing, install-
ing, or repairing. Only a qualified service person should
install, service, or repair the fireplace. Have burner
system inspected annually by a qualified service
person.
9. You must keep control compartments, burners, and
circulating air passages clean. More frequent cleaning
may be needed due to excessive lint and dust. Turn off
the gas valve and pilot light before cleaning fireplace.
10. Have venting system inspected annually by a qualified
service person. If needed, have venting system cleaned
or repaired. Refer to Cleaning and Maintenance, Page
48.
11. Keep the area around your fireplace clear of combus-
tible materials, gasoline, and other flammable vapor and
liquids. Do not run fireplace where these are used or
stored. Do not place items such as clothing or decora-
tions on or around fireplace.
12. Do not use this fireplace to cook food or burn paper or
other objects.
13. Never place anything on top of fireplace.
14. Do not use any solid fuels (wood, coal, paper, card-
board, etc.) in this fireplace. Use only the gas type
indicated on rating plate.
Please leave these instructions with the appliance.
Please retain these instructions for future reference
.
This fireplace is a vented product. This fireplace must be
properly installed by a qualified service person. The glass
door must be properly seated and sealed. If this unit is not
properly installed by a qualified service person with glass
door properly seated and sealed, combustion leakage can
occur.
Early signs of carbon
monoxide poisoning are similar to the flu with headaches,
dizziness and/or nausea. If you have these signs, the fire-
place may not have been installed properly. Get fresh air
at once! Have the fireplace inspected and serviced by a
qualified service person. Some people are more affected
by carbon monoxide than others. These include pregnant
women, people with heart or lung disease or anemia,
those under the influence of alcohol, and those at high
altitudes.
Propane/LP gas and natural gas are both odorless. An
odor-making agent is added to each of these gases. The
odor helps you detect a gas leak. However, the odor added
to these gases can fade. Gas may be present even though
no odor exists.
Make certain you read and understand all warnings. Keep
this manual for reference. It is your guide to safe and proper
operation of this fireplace.
1. 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.
2. For propane/LP fireplace, do not place propane/LP
supply tank(s) inside any structure. Locate propane/LP
supply tank(s) outdoors. To prevent performance prob-
lems, do not use propane/LP fuel tank of less than 100
lbs. capacity.
3. If you smell gas
• shut off gas supply.
• do not try to light any appliance.
• do not touch any electrical switch; do not use any
phone in your building .
• immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
Continued on page 4
473D0024
KHLDV Series Gas Fireplace
Continued from page 3
15. This appliance, when installed, must be electrically
grounded in accordance with local codes or in the
absence of local codes, with the National Electrical
Code, ANSI/NFPA 70, or the Canadian Electrical Code,
CSA C22.1.
16. Do not obstruct the flow of combustion and ventilation
air in any way. Provide adequate clearances around
air openings into the combustion chamber along with
adequate accessibility clearance for servicing and
proper operation.
17. When the appliance is installed directly on carpeting,
tile or other combustible material other than wood floor-
ing, you must set appliance on a metal or wood panel
or hearth pad extending the full width and depth of the
appliance.
18. Do not use fireplace if any part has been exposed to
or has been under water. Immediately call a qualified
service technician to inspect the appliance and replace
any part of the control system and any gas control which
as been submerged in water.
19. Do not operate fireplace if any log is broken.
20. Do not use a blower insert, heat exchanger insert, or
any other accessory not approved for use with this
fireplace.
21. Do not operate the fireplace with glass door removed,
cracked, or broken.
Direct Vent type appliances draw all combustion air from outside of the dwelling through the vent pipe.
These appliances have been tested by CSA and found to comply with the established standards for
DIRECT VENT GAS FIREPLACE HEATERS in the USA and Canada as follows:
TESTED TO: ANSI Z21.88b-2008/CSA 2.33b-2008 STANDARDS
A manufactured home (USA only) or mobile home OEM installation must conform with the Manufactured
Home Construction and Safety Standard, or when such a standard is not
applicable, the , or
.
WARNING
!
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH GLASS
UNTIL COOLED.
NEVER ALLOW CHILDREN
TO TOUCH GLASS.
It is normal for fireplaces fabricated of steel to give off
some expansion and/or contraction noises during the
start up or cool down cycle. Similar noises are found with
your furnace heat exchanger or car engine.
It is not unusual for gas fireplaces to give off some odor
the first time it is burned. This is due to the manufacturing
process.
It is recommended that you burn your fireplace for at
least ten (10) hours the first time you use it. Place the
fan switch in the “OFF” position during this time.
73D0024 5
KHLDV Series Gas Fireplace
• This appliance has been certified for use
with either natural or propane gas. See
appropriate data plates.
• This appliance is not for use with solid
fuels.
• The appliance is approved for bedroom or
bedsitting room installations.
• The appliance must be installed in accor-
dance with local codes if any. If none exist
use the current installation code. ANSI
Z223.1/NFPA 54 in the USA, CSA B149 in
Canada.
• This appliance is mobile home approved.
• The appliance must be properly connected
to a venting system.
• The appliance is not approved for closet or
recessed installations.
FP2124
KHLDV controls
Off/Pilot/On Knob
Figure 1 -
KHLDV Series Fireplace
(shown with Millivolt)
Hi/Lo Knob
On/Off/RS Switch
Ignitor
Light Control
Blower Control
(optional)
Access Panel
FP2124
Input ratings are shown in BTU per hour and are certified
without deration for elevations up to 4,500 feet (1,370
m) above sea level.
For elevations above 4,500 feet (1,370 m) in USA,
installations must be in accordance with the current
ANSI Z223.1/NFPA 54 and/or local codes having juris-
diction.
In Canada, please consult provincial and/or local authori-
ties having jurisdiction for installations at elevations
above 4,500 feet (1,370 m).
Natural Propane (LP)
Inlet Minimum 4.5” w.c. 11.0” w.c.
Inlet Maximum 10.5” w.c. 13.0” w.c.
Manifold Pressure 3.5” w.c. 10.0” w.c.
KHLDV500NV Nat. 50,000 35,500
KHLDV500PV LP 50,000 38,500
KHLDV500NSC Nat. 50,000 35,500
KHLDV500PSC LP 50,000 38,500
KHLDV500 Nat. 2.3 mm #30 (.1285)
KHLDV500 LP #50 (.070") #55 (.052")
673D0024
KHLDV Series Gas Fireplace
D
E
J
H
O
P - Min. Rough Opening Width
Q
S
R
R
T
Min. Rough
Opening
Depth
1/2” or 5/8”
Min. Rough
Opening
Height
730129
DVKHL/KHLDV dims
A
B
C
L
K
F
M
N
IG
Figure 2 -
Fireplace and Framing Dimensions
A 44ZB\zn" (1141 mm) 48ZB\zn" (1243 mm)
B 35Z\x" (902 mm) 39Z\x" (1003 mm)
C 32" (813 mm) 36" (914 mm)
D 22Z\x" (572 mm) 24Z\x" (622 mm)
E 28Z\," (714 mm) 32Z\," (816 mm)
F 30" (762 mm) 30" (762 mm)
G 38M\zn" (976 mm) 38M\zn" (976 mm)
H 23M\," (606 mm) 23M\," (606 mm)
I 44C\," (1127 mm) 44C\," (1127 mm)
J 8>\zn" (218 mm) 8>\zn" (218 mm)
K 4Z\v" (108 mm) 4Z\v" (108 mm)
L 4" (102 mm) 4" (102 mm)
M 38Z\zn" (967 mm) 38Z\zn" (967 mm)
N 1" (25 mm) 1" (25 mm)
Framing Dimensions
O 44C\v" (1137 mm) 44C\v" (1137 mm)
P 45B\zn" (1153 mm) 49B\zn" (1253 mm)
Q 23M\," (606 mm) 23M\," (606 mm)
R 53B\," (1362 mm) 56M\zn" (1434 mm)
S 75M\," (1927 mm) 49M\," (2029 mm)
T 37ZB\zn" (964 mm) 39ZB\zn" (1014 mm)
73D0024 7
KHLDV Series Gas Fireplace
Read this homeowner manual thoroughly and follow all
instructions carefully. Inspect all contents for shipping
damage and immediately inform your dealer if any damage
is found. Do not install any unit with damaged, incomplete,
or substitute parts. Check your packing list to verify that
all listed parts have been received. You should have the
following:
• Fireplace (Firebox and Burner System)
• Log Set
• Rock Wool
• Noncombustible Panel
• Phillips Screwdriver • Framing Materials
• Hammer • Wall Finishing Materials
• Saw and/or saber saw • Level
• Measuring Tape • Pliers
• Electric Drill and Bits • Square
• Pipe Wrench • Tee Joint
• Noncombustible finishing material or dura-rock*
• Caulking Material (noncombustible)
• Fireplace Surround Material (noncombustible)
• Piping Complying with Local Codes
• Pipe Sealant Approved for use with Propane/LPG
(Resistant to sulfur compounds)
* Only used if desired to cover painted face other than using tiles
or marble. If tiles or marble are used around the face then the
non-combustible material is not needed.
Firebox framing can be built before or after the appliance
is set in place. Refer to Figure 2 for firebox dimensions
and framing. Construct firebox framing following Figure
2 for your specific installation requirements. The framing
headers may rest on the top of the firebox standoffs. Do
not bring headers below top of standoffs. When
planning your framing and installation, keep in mind that
your gas line will come in on the right side of the box (as
you are facing it) and your electricity will come in on the
left side.
The firebox may be installed directly on a combustible floor
or raised on a platform of an appropriate height. When
the firebox is installed directly on carpeting, tile, or other
combustible material, other than wood flooring, the firebox
shall be installed on a metal or wood panel extending the
full width and depth of the enclosure.
873D0024
KHLDV Series Gas Fireplace
Plan for the installation of your appliance. This includes determining where the unit is to be installed,
the vent configuration to be used, framing and finishing details, and whether any optional accessories
(i.e. blower, wall switch, or remote control) are desired. Consult your local building code agency to
ensure compliance with local codes, including permits and inspections.
The following factors should be taken into consideration:
• Clearance to side-wall, ceiling, woodwork, and windows. Minimum clearances to combustibles
• This fireplace may be installed along a wall, across a corner, or use an exterior chase. Refer to
Figure 3 for suggested locations.
• Location should be out of high traffic areas and away from furniture and draperies due to heat
from appliance.
• Never obstruct the front opening of the fireplace.
• Do install in the vicinity where gasoline or other flammable liquids may be stored.
• Vent pipe routing. Refer to the Venting section found in this manual for allowable venting con-
figurations.
• These units can be installed in a bedroom. See National Fuel Gas Code ANSI Z233.1/NFPA 54
— (current edition), the Uniform Mechanical Code — (current edition), and Local Building Codes
for specific installation requirements.
• These units can be installed in a bathroom.
Figure 3 -
Locating Gas Fireplace
** Island (C) and room divider (D) installation is possible as long
as the horizontal portion of vent system (X) does not exceed
20'. Refer to Installing Horizontal Termination Configuration
on Page 15.
* When you install your fireplace in (D) room divider or (E)
flat on wall corner positions (Y), a minimum of 6" clearance
must be maintained from perpendicular wall and front of
fireplace.
Y
EAB
C
D
F
Y
X
FP1948
A Flat on Wall
B Cross Corner
C Island**
D Room Divider*
E Flat on Wall Corner*
F Chase Installation
Y 6" Minimum
73D0024 9
KHLDV Series Gas Fireplace
72” Minimum
Ceiling
12” Max.
Depth
21/2” Max Depth
10” min.
From Opening
16” Min.
From Opening
6” Min.
FP2128
mantel clearances
FP2128
12"
16"
10"
12"
6"
21/2"
FP2204
mantel clearances
Wall
Stud
Insulation
Board
Standoff
Top of Fireplace
Opening
FP2235
Figure 4 -
Clearances from the mantel, ceiling, and side wall.
6"
5"
3"
21/2"41/2"
45°
1"
31/2"
FP2129
mantel leg
11/2"
FP2129
Fireplace Opening
Figure 5 -
Mantel clearances
10 73D0024
KHLDV Series Gas Fireplace
The fireplace must be secured to the floor and/or to framing studs as shown in Figure 6. Use two
(2) wood screws or masonry/ concrete screws to secure fireplace to the floor. Use four (4) screws
to attach fireplace to framing. The side nailing flanges are 1/2" or 5/8" to accommodate different
wall thickness.
FP2130
secure fireplace to floor
6”
Framing Members
Noncombustible Material
Noncombustible
Material Must Rise
at Least to Top of
Stand off
Secure to Floor Behind
Access Panels
All Combustible Materials
Must Keep 3/4" Spacing
Nailing Flange
FP2130
Figure 6 -
Secure Fireplace to Floor and Framing Studs
Any remote wiring (i.e. remote control, wall switch, and optional fan) must be done prior to
final finishing to avoid costly reconstruction.
Only noncombustible materials (i.e. brick, tile, slate, steel, or other materials with a UL fire rating of
Zero) may be used to cover the black painted face of the appliance. It is permissible to bring com-
bustible wall board to the top of the stand-offs on the top and the sides of the unit. A 300°F minimum
adhesive may be used to attach facing materials to the black surface. If joints between the finished
wall and the fireplace surround are sealed, a 300°F minimum sealant material (General Electric
RTV103 or equivalent) must be used.
73D0024 11
KHLDV Series Gas Fireplace
Consult local building codes before beginning the
installation. The installer must make sure to select the
proper vent system for installation. Before installing vent
kit, the installer must read this fireplace manual and vent
kit instructions.
Only a qualified installer/service person should install vent-
ing system. The installer must follow these safety rules:
• Wear gloves and safety glasses for protection.
• Use extreme caution when using ladders or when
on rooftops.
• Be aware of electrical wiring locations in walls and
ceilings.
The following actions will void the warranty on your vent-
ing system:
• Installation of any damaged venting component.
• Unauthorized modification of the venting system.
• Installation of any component part not manufactured
or approved by MHS.
• Installation other than permitted by these instruc-
tions.
**1”
FP2131
Vent pipe clearances
**1”
*3”
73”
(1854 mm)
until the flue penetrates the outside wall.
* A minimum of 3" clearance
to the top is required along
horizontal length until flue pipe
penetrates outside wall.
** A minimum 1" clearance
to combustibles permitted all
around flue at outside wall
24" Vertical Rise
Required Before
Horizontal Run
Figure 7 -
Combustible Clearances for Vent Pipe
FP2131
12 73D0024
KHLDV Series Gas Fireplace
There are two basic types of direct-vent installation:
• Horizontal Termination
• Vertical Termination
It is important to select the proper length of vent pipe for
the type of termination you choose. It is also important to
note the wall thickness.
Select the amount of vertical rise desired. All horizontal run of venting must have 1/4" rise for every 12" of run
towards the termination.
You may use up to three 90° elbows in this vent configuration. Refer to Vertical/Horizontal Termination Con-
figurations on Pages 17 and 18.
Measure the distance from the fireplace floor to the ceiling. Add the ceiling thickness, the vertical rise in an
attic or second story, and allow for sufficient vent height above the roof line.
You may use two 45° elbows in place of a 90° elbow. You must follow rise to run ratios when using
45° elbows. The appliance is approved for use with three 90° elbows maximum or a combination of 90° and
45° elbows up to a maximum of 270°.
For two-story applications, firestops are required at each floor level. If an offset is needed in the attic, additional
pipe and elbows will be required.
You may use a chase with a vent termination with exposed pipe on the exterior of the house. See Installing A
Vent System in an Outside Chase below. If pipe is enclosed in chase, it is not exposed.
It is very important that the venting system maintain its balance between the combustion air intake and the
flue gas exhaust. Certain limitations apply to vent configurations and must be strictly followed.
A chase is a vertical boxlike structure built to enclose venting that runs along the outside of a building. A chase
is required for such venting.
73D0024 13
KHLDV Series Gas Fireplace
V
V
V
V
V
V
V
X
X
X
D
E
B
B
B
C
B
M
B
A
J
K
F
L
VENT TERMINATION AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED
H
I
Fixed
Closed
Operable
Operable Fixed
Closed
V
B
CFM145a
DV Termin Location
5/01/01 Rev. 12/05/01
sta
INSIDE
CORNER DETAIL
V
A
G
CFM145a
A = Clearance above grade, veranda, porch, 12” (30 cm) 12” (30 cm)
deck, or balcony
B = Clearance to window or door that may be 6” (15 cm) for appliances 6” (15 cm) for appliances
opened < 10,000BTU/h (3kW), 12” (30 cm) < 10,000 BTU/h (3kW), 9”
for appliances > 10,000 Btuh (3kW) and (23 cm) for appliances > 10,000
< 100,000 BTU/h (30kW), 36” (91 cm) Btuh (3kW) and < 50,000 BTU/h
for appliances > 100,000 BTU/h (30kW) (15kW), 12” (30 cm) for
appliances > 50,000 BTU/h(15kW)
C = Clearance to permanently closed window 12” (305 mm) recommended to 12” (305 mm) recommended to
prevent window condensation prevent window condensation
D = Vertical clearance to ventilated soffit located
above the terminal within a horizontal 18” (458 mm) 18” (458 mm)
distance of 2’ (610mm) from the center
line of the terminal
E = Clearance to unventilated soffit 12” (305 mm) 12” (305 mm)
F = Clearance to outside corner see next page see next page
G = Clearance to inside corner (see next page) see next page see next page
H = Clearance to each inside of center line 3’ (91 cm) within a height of 15’ (5 m) 3’ (91 cm) within a height of 15’
extended above meter/regulator assembly above the meter/regulator assembly (5 m) above the meter/regulator
assy
I = Clearance to service regulator vent outlet 3’ (91 cm) 3’ (91 cm)
J = Clearance to nonmechanical air supply inlet 6” (15 cm) for appliances < 10,000 6” (15 cm) for appliances
to building or the combustion air inlet to any BTU/h (3kW), 12” (30 cm) for < 10,000 BTU/h (3kW), 9”
other appliances appliances > 10,000 BTU/h (3kW) and (23 cm) for appliances > 10,000
< 100,000 Btuh (30kW), 36” (91 cm) BTU/h (3kW) and < 50,000 BTU/h
for appliances > 100,000 BTU/h (30kW) (15kW), 12” (30 cm) for
appliances > 50,000 BTU/h(15kW)
K = Clearance to a mechanical air supply inlet 6’ (1.83 m) 3’ (91 cm) above if within 10'
(3 m) horizontally
L = Clearance above paved sidewalk or paved 7’ (2.13 m)† 7’ (2.13 m)†
driveway located on public property
M = Clearance under veranda, porch, deck or 12” (30 cm) 12” (30cm)
balcony
1 In accordance with the current CSA-B149 Installation Codes
2 In accordance with the current ANSI Z223.1/NFPA 54 National Fuel
Gas Codes
† 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:
NOTE: 1. Local codes or regulations may require different
clearances.
2. The special venting system used on Direct Vent Fireplaces
are certified as part of the appliance, with clearances
tested and approved by the listing agency.
3. MHSC assumes no responsibility for the improper
performance of the appliance when the venting system
does not meet these requirements.
Figure 8 -
Termination Locations
14 73D0024
KHLDV Series Gas Fireplace
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
2 4 6 8 10 1214 16 1820
eg: A
FP2132
sidewall vent graph
V
GG=6" (152mm)
FF=6" (152mm)
V
V
G
G = Combustible 24"(610mm)
Noncombustible 18"(457mm)
Combustible &
Noncombustible
H = 24" (610mm)
J = 20" (508mm)
V
H
J
C = Maximum depth of 48" (1219mm)
for alcove location
D = Minimum width for back wall of
alcove location
Combustible - 38" (965mm)
Noncombustible - 24" (610mm)
E =Clearance from corner in alcove
location
Combustible - 6" (152mm)
Noncombustible - 2" (51mm)
E
V
D
C
C
Inside Corner
Alcove Location
Outside Corner
Balcony with No Side Wall Balcony with Perpendicular
Side Wall
FP1951
termination clearances
Figure 9 -
Allowable Venting Chart
The Vent Graph should be read in conjunction with the
following vent installation instructions to determine the
relationship between the vertical and horizontal dimensions
of the vent system.
1. Determine the height of the center of the horizontal vent
pipe exiting through the outer wall. Using this dimen-
sion on the Sidewall Vent Graph below, locate the point
intersecting with the slanted graph line.
2. From the point of this intersection, draw a vertical line
to the bottom of the graph.
3. Select the indicated dimension, and position the fire-
place in accordance with same.
Example: If the vertical dimension from the floor of the
fireplace is 11' (3.4 m) the horizontal run to the face of
the outer wall must not exceed 16' (4.9 m).
Sidewall Vent Graph showing the relationship between
vertical and horizontal dimensions for a Direct Vent flue
system.
Dimensions in
Feet
Combustible – 6" (152 mm)
Noncombustible – 2" (51mm)
Figure 10 -
Rear Wall Venting Graph
Horizontal dimension from the finished outside wall
to the center of the pipe on the fireplace
Vertical Dimension From the Floor of Unit to the Center of the
Horizontal Vent Pipe
73D0024 15
KHLDV Series Gas Fireplace
Max 20"
Max 20"
36"
(914 mm)
Max.
36"
(914 mm)
Max.
FP1177
max horizontal run
24”
(610 mm)
FP1176
max 90 bends
• The maximum number of 90° elbows per side wall installation is three (3). Figure 11
• A minimum of 24" is required before a 90° elbow. If a 90° elbow is fitted directly after 24" vertical
section mounted to the top of the fireplace, the maximum horizontal vent run before the termination
or a vertical rise is 36” (914 mm). Figure 12
The Vent Graph, showing the relationship between vertical and horizontal side wall venting, will help to
determine the various dimensions allowable. Figure 10
NOTE: Horizontal sections of this vent system require a minimum of 3" clearances to combustibles
at the top of the flue and 1" clearance at the sides and bottom until the flue penetrates the outside
wall. A minimum 1" clearance all around the flue is acceptable at this point of penetration.
Vertical sections of this vent system require a minimum of 1" clearance to combustibles on all
sides of the pipe.
When vent exits through foundations less than 20" below outcrop, the termination must be flush up with
outcropped wall above.
It is best to locate the fireplace in such a way that minimizes the number of offsets and horizontal vent
length.
The horizontal vent run refers to the total length of vent pipe from the flue collar of the fireplace (or the
top of the Transition Elbow) to the face of the finished outside wall.
Figure 11 -
Maximum Three (3) 90° Elbows Per Installation
3 x 90°
Elbows
24" Min.
FP1176
FP1177
Figure 12 -
Maximum Horizontal Run with No Rise
16 73D0024
KHLDV Series Gas Fireplace
(continued)
• If a 90° elbow is used in the horizontal vent run (level
height maintained) the horizontal vent length is reduced
by 36". Refer to Page 17, Figures 11 and 12. This does
not apply if the 90° elbows are used to increase or
redirect a vertical rise. Figure 14
According to the vent graph (Page 16) the
maximum horizontal vent length in a system with a 10'
vertical rise is 20’ (6 m) and if a 90° elbow is required in
the horizontal vent it must be reduced to 17' (5.2 m).
In Figures 13 and 14 dimension A plus B must not be
greater than 17' (5.2 m).
• The maximum number of 45° elbows permitted per side
wall installation is two (2). These elbows can be installed
in either the vertical or horizontal run.
• For each 45° elbow installed in the horizontal run, the
length of the horizontal run MUST be reduced by 18" (45
cm). This does not apply if the 45° elbows are installed
on the vertical part of the vent system.
• The maximum number of elbow degrees in a system is
270°. Figure 15
A 10’
B 7’
10’
FP1959
max vent run w/elbows
Figure 14 -
Maximum Vent Run with Elbows
A + B = 17' Maximum
90° Elbow = 3'
FP1959
Example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
Figure 15 -
Maximum Elbow Usage
1
2
3
4
1
2
3
4
FP1180
max bends
24" Minimum
FP1180
AB
10’
90°
FP2133
Horizontal run
reduction
Figure 13 -
Horizontal Run Reduction
FP2133
73D0024 17
KHLDV Series Gas Fireplace
When it is not possible to meet the required vent terminal clearances of 12" above grade level, a snorkel kit is
recommended. It allows installation depth down to 7" (178mm) below grade level. The 7" (178mm) is measured
from the center of the horizontal vent pipe as it penetrates through the wall.
If installing a snorkel, a minimum 24" vertical rise is necessary. The maximum horizontal run with the 24” verti-
cal pipe is 36". This measurement is taken from the collar of the fireplace (or transition elbow) to the face of
the exterior wall. See the Sidewall Venting Graph for extended horizontal run if the vertical exceeds 24".
1. Establish vent hole through the wall.
2. Remove soil to a depth of approximately 16" below base of snorkel. Install drain pipe. Install window well
(not supplied). Refill hole with 12" of coarse gravel leaving a clearance of approximately 4" below snorkel.
Figure 16
3. Install vent system.
4. Ensure a watertight seal is made around the vent pipe coming through the wall.
5. Apply high temperature sealant caulking (supplied) around the 5" and 8" snorkel collars.
6. Slide the snorkel into the vent pipes and secure to the wall.
7. Level the soil so as to maintain a 4" clearance below snorkel. Figure 16
If the foundation is recessed, use recess brackets (not supplied) for securing lower portion of the snorkel.
Fasten brackets to wall first, then secure to snorkel with self drilling #8 x 1/2 sheet metal screws. It will be
necessary to extend vent pipes out as far as the protruding wall face. Figure 17
FP2134
below grade install
FP2134 Figure 16 -
Below Grade Installation
Screws
Minimum
4" Clearance
Ground
Window Well
Gravel
Drain
Foundation Wall
Firestop
24"
Minimum
FP1966
snorkel
Figure 17 -
Snorkel Installation, Recessed Foundation
Foundation
Recess
Watertight Seal
Around Pipe
Sheet Metal
Screws
Wall Screws
Snorkel
18 73D0024
KHLDV Series Gas Fireplace
FP1183
max height
40' Maximum Height
12' Minimum Height
10'
Maximum
Support Straps
Every 3'
24" Min.
FP1183
This gas fireplace has been approved for,
• Vertical installations up to 40' (12 m) in height. Up to a 10'
(3 m) horizontal vent run can be installed within the vent
system using a maximum of two 90° elbows. Figure 18
Figure 18 -
Support Straps for Horizontal Runs
• Up to two 45° elbows may be used within the horizontal
run. For each 45° elbow used on the horizontal plane, the
maximum horizontal length must be reduced by 18" (450
mm).
Example: Maximum horizontal length
No elbows = 10’ (3 m)
1x45° elbows = 8.5’ (2.6 m)
2x45° elbows = 7’ (2.1 m)
• A minimum of an 8' (2.5 m) vertical rise is required.
• Two sets of 45°elbows offsets may be used within the vertical
sections. From 0 to a maximum of 8' (2.5 m) of vent pipe
can be used between elbows. Figure 19
• The maximum angular variation allowed in the system is
270°. Figure 19
• The minimum height of the vent above the highest point of
penetration through the roof is 2' (610 mm).
Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
Horizontal sections of this vent system require a
minimum of 3" clearances to combustibles at the top of the
flue and 1" clearance at the sides and bottom until the flue
penetrates the outside wall. A minimum 1" clearance all around
the flue is acceptable at this point of penetration.
Vertical sections of this vent system require a minimum of 1"
clearance to combustibles on all sides of the pipe.
24" Min.
1
2
3
4
1
2
3
4
FP1179
max bends
Figure 19 -
Maximum Elbow Usage
FP1179
73D0024 19
KHLDV Series Gas Fireplace
1. Determine the route your vertical venting will take. If ceiling
joist, roof rafters or other framing will obstruct the venting
system, consider an offset. Refer to Figure 20 to avoid cutting
load bearing members.
For optimal flame appearance, a restrictor disk is necessary on
straight vertical runs of 10' of more.
• Runs may not incorporate elbows.
• The disk is part number 56D3027 and is included in instal-
lation manual packet.
• Drop the disk into a 5" inner collar before installing the first
section of flue or install at the last section before installing
the termination.
• An additional disk may be installed on runs of 35' or more.
Rotate disks perpendicular to each other.
Pay special attention to these installation instructions for
required clearances (air space) to combustibles when passing
through ceilings, walls, roofs, enclosures, attic rafters, etc. Do
not pack air spaces with insulation. Also note maximum vertical
rise of the venting system and any maximum horizontal offset
limitations. Offsets must fall within the parameters shown in
Figures 19 and 20.
2. Set fireplace in desired location. Drop a line plumb down from
the ceiling to the position of the flue exit. Mark the center point
where the vent will penetrate the ceiling. Drill a small locating
hole a this point.
Drop a plumb line from the inside of the roof to the ceiling
locating hole in the ceiling. Mark the center point where the
vent will penetrate the roof. Drill a small locating hole at this
point.
1. Cut a 101/2" (241 mm) square hole in the ceiling using the
locating hole as a center point The opening should be framed
to 101/2"x101/2" (241 x 241 mm) inside dimensions as shown
in Figure 22 using framing lumber the same size as the ceil-
ing joist. If the area above the ceiling is an insulated ceiling
or a room, nail firestop from the top side. This prevents loose
insulation from falling into the required clearance space. Figure
21. Otherwise, install firestop below the framed hole. Figure
22
2. Assemble the desired lengths of pipe and elbows necessary
to reach from the burner system flue up through the firestop.
Be sure pipe and elbow connections are fully twist-locked.
FP1969
firestop w room above
10
1
/
2
"
10
1
/
2
"
FP1970
firestop no room
Figure 21 - If Area Above is a Room, Install Firestop
above Framed Hole as Shown
Figure 22 - If Area Above is Not a Room, Install
Firestop above Framed Hole as Shown
Firestop
Nails
Nails Firestop
FP1969
offset w/ wallstrap
Figure 20 -
Offset with Wall Strap and 45° Elbows
Roof Flashing
Wall Strap
45° Elbows
Ceiling Firstop
FP1669
FP1970
20 73D0024
KHLDV Series Gas Fireplace
3. Cut a hole in the roof using the locating hole as a center point. (Cover any exposed open vent pipes before
cutting hole in roof). The 101/2"x101/2" (241mm x 241mm) hole must be measured on the horizontal. Actual
length may be larger depending on the pitch of the roof. There must be a 1" minimum clearance from the
vent pipe to combustible materials. (Insulation should be considered a combustible material).
4. Connect a section of pipe and extend up through the hole.
If an offset is needed to avoid obstructions, you must support the vent pipe every three (3) feet. Use wall
straps for this purpose. See Figure 18, page 19. Whenever possible, use 45° elbows instead of 90° elbows.
The 45° elbow offers less restriction to the flow of the flue gases and intake air.
5. Place the flashing over the pipe section(s) extending through the roof. Secure the base of the flashing to
the roof and framing with roofing nails. Be sure roofing material overlaps the top edge of the flashing. There
must be a 1" clearance from the vent pipe to combustible materials.
6. Continue to add pipe sections until the height of the vent cap meets the minimum building code require-
ments.
You must increase vent height for steep roof pitches. Nearby trees, adjoining roof lines, steep pitched
roofs, and other similar factors may cause poor draft or down-drafting in high winds. Increasing the vent height
may solve this problem.
If the vent pipe passes through any occupied areas above the first floor, including storage spaces
and closets, you must enclose pipe. You may frame and sheetrock the enclosure with standard construction
material. Make sure to meet the minimum allowable clearances to combustibles. Do not fill any of the required
clearance spaces with insulation.
2 ft.
Min. 2 ft. Min.
X
12
H*
FP1971
Min chimney clearance
Horizontal Overhang
Termination Vent
Lowest
Discharge
Opening
Storm Collar
Flashing
Concentric
Vent Pipe
1" Minimum
Clearances to
Combustibles
Vertical Wall
FP1971
Figure 23 -
Minimum Chimney Clearance
Flat to 6/12 1.0
Over 6/12 to 7/12 1.25
Over 7/12 to 8/12 1.5
Over 8/12 to 9/12 2.0
Over 9/12 to 10/12 2.5
Over 10/12 to 11/12 3.25
Over 11/12 to 12/12 4.0
*H - Minimum height from roof to
lowest discharge opening of vent
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