Monessen Hearth KSTDV500 User manual
73D4125 10/09 Rev. 1
734126
dvkst kstdv cover
273D4125
KSTDV Series Gas Fireplace
High Elevations ........................................................ 5
Gas Pressures ......................................................... 5
Gas Specifications & Orifice Sizes ........................... 5
Before You Start ....................................................... 7
Fireplace Framing .................................................... 7
Fireplace Location .................................................... 8
Installation Precautions ...........................................11
Installation Clearances ............................................11
Installation Planning ............................................... 12
Vertical/Horizontal Termination Locations .............. 13
Vertical/Horizontal Termination Configurations ...... 15
Below Grade Installation ........................................ 16
Vertical Through-the-Roof Applications .................. 17
Installation for Vertical Termination ........................ 18
Flat Ceiling Installation ........................................... 18
Check Gas Type..................................................... 20
Install Gas Supply Line .......................................... 21
Electrical Wiring ..................................................... 22
Operating Instructions ............................................ 26
To Turn Off Gas ...................................................... 26
Remote Transmitter Operation ............................... 30
Rockwool Placement ............................................. 34
Log Placement ....................................................... 35
Burner, Pilot and Control Compartment ................. 38
Pilot Flame ............................................................. 38
Burner Flame ......................................................... 38
Vent System ........................................................... 39
Glass Door ............................................................. 39
Logs ....................................................................... 39
Rock Wool ............................................................. 39
Firebox Components .............................................. 41
Signature Command System ................................. 42
Logs ....................................................................... 44
Vent Components .................................................. 45
73D4125 3
KSTDV 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
39.
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.
473D4125
KSTDV Series Gas Fireplace
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 appli-
cable, 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 fireplace 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.
73D4125 5
KSTDV 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 accordance 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.
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.
KSTDV500 Nat. #46 #29
KSTDV500 LP #56 #50
Figure 1 -
KSTDV Controls
FP2543
FP2543
kstdv controls
Control Box
Gas Valve
Command
Center
KSTDV500 Nat. 56,000 37,000 30,000
KSTDV500 LP 56,000 44,000 27,000
673D4125
KSTDV Series Gas Fireplace
Rough
Opening
Height
1/2” or 5/8”
Recessed
Nailing Flange
50” (1270 mm)
Rough Opening Width
Rough
Opening
Depth
36” (914 mm)
396” (1007 mm)
446M”
(1137 mm)
456M”
(108 mm)
4456O”
(1130 mm)
386”
(981 mm)
23”
(584 mm)
24”
(610 mm)
4956O” (1257 mm)
30"
(762 mm)
25”
(635 mm)
1156O”
(292 mm)
734126
DVKST KSTDV DIMS
Figure 2 -
Fireplace and Framing Dimensions
For exterior wall applications, outdoor facing kit
KST500SSDK is required. In these installations, the con-
trol-side of the unit MUST face towards the interior of the
building.
73D4125 7
KSTDV 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 • Fasteners
• Rock Wool • Restrictor Plate/Disc (2)
• White Toggle Switch • Switch Cover Plate
• 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 Panel
• Caulking Material (noncombustible)
• Fireplace Surround Material (noncombustible)
• Piping Complying with Local Codes
• Pipe Sealant Approved for use with Propane/LPG
(Resistant to sulfur compounds)
Firebox framing can be built before or after the appliance
is set in place. 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. NOTE: 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.
873D4125
KSTDV 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. See Venting section found in this manual for allowable venting configura-
tions.
• 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.
Y
DA
B
C
E
Y
X
LU584
Locating unit
DVT38S2
3/17/04 djt
** Island (C) and Room Divider (D) installation is possible as long
as the horizontal portion of the vent system (X) does not exceed
20’ (610cm). See details in Venting Section.
* When you install your fireplace in (D) Room divider or (E) Flat
on wall corner positions (Y), a minimum of 6” (152mm) clearance
must be maintained from the perpendicular wall and the front side
edge of the fireplace.
A Flat on wall
B **Island
C *Room divider
D *Flat on wall corner
E Chase installation
Y 6” minimum
Figure 3 -
Locate Fireplace
For exterior wall applications, outdoor facing kit
KST500SSDK is required. In these installations, the con-
trol-side of the unit MUST face towards the interior of the
building.
73D4125 9
KSTDV Series Gas Fireplace
45°
1”
4”
5”
6”
”
3”
FP2410
mantel leg clearance
The combustible area above the facing must not protrude
more than 1/2" from the facing. If it does, it is considered a mantel
and must meet the mantel requirements listed in this manual.
Figure 5 -
Mantel Clearance
72”
(1829 mm)
Min.
Ceiling
12”
(305 mm)
Max. Depth
16”
(406 mm)
Min.
6”
(152 mm)
Min.
FP2544
DVKST ceiling wall clearance
8” Min.
(203 mm)
Noncombustible
Figure 4 -
Ceiling and Side Wall Clearances
Combustible Mantel
FP2544
Stud
Finish Wall
Combustible
Material Area
FP2488
CFM146d
mantel chart
16”
12”
10”
12”
6”
256O”
Noncombustible
Material to Top of
Standoffs
CFM146d
Top of Fireplace
Opening
10 73D4125
KSTDV Series Gas Fireplace
The fireplace must be secured to the floor and/or to framing studs as shown in Figure 6 . Use four
(4) wood screws or masonry/ concrete screws to secure fireplace to the floor. Use four (4) screws
to attach fireplace to framing. The side brackets or nailing flanges are designed to accommodate
two wall boards thicknesses, 1/2" or 5/8".
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 surface of the appliance. A 300°F minimum adhesive may
be used to attach facing materials to the black surface. If joints between the finished wall and the
fireplace surround are sealed, a 300°F minimum sealant material (General Electric RTV103 or
equivalent) must be used.
FP2545
secure fireplace
Nailing Flange
Screws
Framing
FP2545
Noncombustible
Material
Figure 6
73D4125 11
KSTDV 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 the
venting 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 ceil-
ings.
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 MHSC
• Installation other than permitted by these instructions.
until the flue penetrates the outside wall.
*3”
**1”
**1”
FP2567
KSTDV vent clearances
24”
(610 mm)
72”
(1829 mm)
Figure 7 -
Combustible Clearances for Vent Pipe
* 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
FP2567
12 73D4125
KSTDV 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 below 7Z\x feet of vertical rise. With 7Z\x feet or more
vertical rise off top of fireplace, the horizontal run may be level. NEVER run vent piping down.
You may use up to three 90° elbows in this vent configuration. See Horizontal Termination
Configurations on Pages 13 and 14.
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.
NOTE: 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 Vent System in a 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.
73D4125 13
KSTDV Series Gas Fireplace
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 7 -
Termination Locations
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
14 73D4125
KSTDV Series Gas Fireplace
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 8 -
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.
Figure 9 -
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
Dimensions in
Feet
Combustible – 6" (152 mm)
Noncombustible – 2" (51mm)
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
72" to Center
of Horizontal
Pipe
73D4125 15
KSTDV Series Gas Fireplace
The Vent Graph, showing the relationship between vertical
and horizontal side wall venting, will help to determine the
various dimensions allowable. Figure 9
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.
• The maximum number of 90° elbows per side wall
installation is three (3). Figure 10
• 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 11
FP1176
max 90 bends
Figure 10 -
Maximum Three (3) 90° Elbows Per Installation
3 x 90°
Elbows
24" Min.
FP1176
Max 20"
Max 20"
36"
(914 mm)
Max.
36"
(914 mm)
Max.
FP1177
max horizontal run
24”
(610 mm)
FP1177
Figure 11 -
Maximum Horizontal Run with No Rise
• If a 90° elbow is used in the horizontal vent run (level
height maintained) the horizontal vent length is reduced
by 36". Refer to Figures 10 and 11. This does not apply
if the 90° elbows are used to increase or redirect a verti-
cal rise. Figure 12
Example: According to the vent graph (page 16) the maxi-
mum horizontal vent length in a system with a 10' vertical
rise is 20’ (6 m) and if a 90° elbow is required in the hori-
zontal vent it must be reduced to 17' (5.2 m).
10'
(3m)
A
A + B = 17' (5.2m)
B
Figure 12 -
Maximum Vent Run with Elbows
FP2488
In Figure 12 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"
(457 mm). 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 14
16 73D4125
KSTDV Series Gas Fireplace
A
B
10’
90°
FP2546
Horizontal run
reduction
Example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
Figure 14 -
Maximum Elbow Usage
1
2
3
4
1
2
3
4
FP1180
max bends
24" Minimum
FP1180
When it is not possible to meet the required vent terminal
clearances of 12" above grade level, a snorkel kit is recom-
mended. It allows installation depth down to 7" (178 mm)
below grade level. The 7" (178 mm) 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 neces-
sary. The maximum horizontal run with the 24” vertical 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
15
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 15
Figure 13 -
Horizontal Run Reduction
FP2546
FP2134
below grade install
FP2134 Figure 15 -
Below Grade Installation
Screws
Minimum
4" Clearance
Ground
Window Well
Gravel
Drain
Foundation Wall
Firestop
24"
Minimum
73D4125 17
KSTDV Series Gas Fireplace
If the foun-
dation is
recessed,
use recess
brackets (not
supplied) for
securing
lower portion
of the snor-
kel. Fasten
brackets to
wall first,
then secure
to snorkel
with self drill-
ing #8 x 1/2
sheet metal
screws. It
will be necessary to extend vent pipes out as far as the
protruding wall face. Figure 16
FP1966
snorkel
Figure 16 -
Snorkel Installation, Recessed Foundation
Foundation
Recess
Watertight Seal Around
Pipe
Sheet Metal
Screws
Wall Screws
Snorkel
FP1966
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 17
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.
• 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"
(457 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 18
• The maximum angular variation allowed in the system
is 270°. Figure 18
• The minimum height of the vent above the highest point
of penetration through the roof is 2' (610 mm).
FP1183
max height
40' Maximum Height
12' Minimum Height
10'
Maximum
Support Straps
Every 3'
24" Min.
FP1183
Figure 17 -
Support Straps for Horizontal Runs
Example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
24" Min.
1
2
3
4
1
2
3
4
FP1179
max bends
Figure 18 -
Maximum Elbow Usage
FP1179
18 73D4125
KSTDV 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
19 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
installation 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. Also disk can be installed
from inside the firebox into the 5" inner collar.
• 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
FP1969
offset w/ wallstrap
Figure 19 -
Offset with Wall Strap and 45° Elbows
Roof Flashing
Wall Strap
45° Elbows
Ceiling Firestop
FP1669
within the parameters shown in Figures 20 and 21.
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 10Z\x" (241 mm) square hole in the ceiling using
the locating hole as a center point The opening should
be framed to 10Z\x"x10Z\x" (241 mm x 241 mm) inside
dimensions as shown in Figure 21 using framing lumber
the same size as the ceiling 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 20. Otherwise,
install firestop below the framed hole. Figure 21
FP1969
firestop w room above
10
1
/
2
"
10
1
/
2
"
FP1970
firestop no room
Figure 20 -
If Area Above is a Room, Install Firestop above
Framed Hole as Shown
Figure 21 -
If Area Above is Not a Room, Install Firestop above
Framed Hole as Shown
Firestop
Nails
Nails Firestop
FP1970
73D4125 19
KSTDV Series Gas Fireplace
2. Assemble the desired lengths of pipe and elbows nec-
essary to reach from the burner system flue up through
the firestop. Be sure pipe and elbow connections are
fully twist-locked.
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 10Z\x"x10Z\x" (241 x 241 mm)
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. Page 17, Figure 17. 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 requirements as
shown in Figure 22.
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 22 -
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
20 73D4125
KSTDV Series Gas Fireplace
Use proper gas type for the fireplace you are installing. If you have conflicting gas type, do not install
fireplace. See dealer where you purchased the fireplace for proper fireplace according to your gas
type.
When using copper or flex connectors use only fittings
approved for gas connections. The gas control inlet is
3/8" NPT.
Before installing fireplace and burner system, make sure you have the items listed below.
• External regulator • Piping (check local codes) • Sealant (resistant to propane/LP gas)
(supplied by installer) • Test gauge connection* • Sediment trap (recommended)
• Equipment shutoff valve* • Tee joint • Pipe wrench
• approved flexible gas line with gas connector (if allowed by local codes — not provided)
* A CSA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge
connection. Purchase the CSA design-certified equipment shutoff valve from your dealer.
For propane/LP connections only, the installer must supply an external regulator. The external regulator will reduce
incoming gas pressure. You must reduce incoming gas pressure to between 11 and 13 inches of water. If you do not
reduce incoming gas pressure, burner system regulator damage could occur. Install external regulator with the vent
pointing down as shown in Figure 23. Pointing the vent down protects it from freezing rain or sleet.
FP1977
external regulator
External
Regulator
100 gal. (min)
Propane/LP
Supply Tank
Vent Pointing
Down
Figure 23 -
External Regulator with Vent Pointing Down
(Propane/LP Only)
FP1977
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