Vermont Casting LHER20 User Manual
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CER TIF IED
INSTALLER/CONSUMER
SAFETY INFORMATION
PLEASE READ THIS MANUAL
BEFORE INSTALLING AND
USING APPLIANCE
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.
Natural Vent Insert
Models: LHER20
LHEC20
LHER30
FOR YOUR SAFETY
Installation and service must
be performed by a qualified
installer, service agency or
the gas supplier.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electric switch;
do not use any phone in your
building.
• Immediately call your gas
supplier from your neighbor’s
phone. Follow the gas suppliers
instructions.
• If you cannot reach your gas
supplier call the fire department.
DO NOT STORE OR USE
GASOLINE OR OTHER
FLAMMABLE VAPORS AND
LIQUIDS IN THE VICINITY OF
THIS OR ANY OTHER
APPLIANCE.
LHEC30
Homeowner's Installation and
Operating Manual
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
10005360 5/06 Rev. 5
LHE Series Natural Vent Insert
Table of Contents
PLEASE READ THE INSTALLATION & OPERATING INSTRUCTIONS BEFORE USING THIS APPLIANCE.
Thank you and congratulations on your purchase of a CFM Corporation fireplace insert.
IMPORTANT - Read all instructions and warnings carefully before starting installation. Failure to follow these
instructions may result in a possible fire hazard and will void the manufacturers' warranty.
Installation Instruction
Important Curing/Burning Instructions ................................................................................................
Locating Your Fireplace Insert ............................................................................................................
Insert Applications ..............................................................................................................................
Fireplace & Trim Dimensions .............................................................................................................
Mantels ...............................................................................................................................................
Framing & Finishing ............................................................................................................................
Zero Clearance Applications ...............................................................................................................
Gas Specifications ..............................................................................................................................
Gas Inlet & Manifold Pressures ..........................................................................................................
High Elevations ...................................................................................................................................
Preparation .........................................................................................................................................
Gas Line Installation ...........................................................................................................................
Gas Supply Pressures ........................................................................................................................
Fan Kit ................................................................................................................................................
Fan Removal Instructions ...................................................................................................................
Installation of Trim Switch for RN/RP Gas Valves ..............................................................................
Venting and Installation ......................................................................................................................
Common Flue Installations .................................................................................................................
Liner Installation .................................................................................................................................
Draft Relief Opening ...........................................................................................................................
Test Chimney Draw .............................................................................................................................
Vent Safety System ..........................................................................................................................
Vent Safety Switch Access ...............................................................................................................
Ceramic Refractory Installation ........................................................................................................
Operating Instructions
General Glass Information ............................................................................................................... 11
Louvre Removal ...............................................................................................................................11
Glass Cleaning .................................................................................................................................11
Glass Frame Removal ......................................................................................................................11
Log & Burner Lava Rock Installation ................................................................................................11
Large Lava Rock Placement ............................................................................................................
Flame Adjustment ............................................................................................................................
Flame Characteristics .......................................................................................................................
First Firing .........................................................................................................................................
Lighting & Operating Instructions ....................................................................................................
Troubleshooting Gas Control (820 Millivolt Gas Valve) ....................................................................
Troubleshooting Gas Control (Honeywell) .......................................................................................
Instructions for RF Comfort Control Valve ........................................................................................
Maintenance
Cleaning the Standing Pilot Control System .....................................................................................
Trim Cleaning ...................................................................................................................................
Replacement Parts ..............................................................................................................................................22
Optional Accessories
Remote Controls ...............................................................................................................................
Zero Clearance Kit ............................................................................................................................
Trim Options .....................................................................................................................................
Warranty
EnerGuide ...........................................................................................................................................................28
...............................................................................................................................................................26
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LHE Series Natural Vent Insert
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Installation & Operating Instructions
This gas appliance should be installed by a qualified installer in
accordance with local building codes and with current CSAB149.1 Installation codes for Gas Burning Appliances and
Equipment. FOR U.S. Installations follow local codes and/or the
current National Fuel Gas Code ANSI Z223.1/NFPA 54.
In the Commonwealth of Massachusetts, all gas fittings and
installation of this heater shall only be done by a licensed gas
fitter or licensed plumber.
FOR SAFE INSTALLATION AND OPERATION OF YOUR
GAS FIREPLACE PLEASE NOTE THE FOLLOWING:
1. This appliance gives off high temperatures and should be
located out of high traffic areas and away from furniture and
draperies.
2. Children and adults should be alerted to the hazards of the
high surface temperatures of this appliance and should stay
away to avoid burns or ignition of clothing.
3. Children should be carefully supervised when they are in the
same room as your appliance.
4. Under no circumstances should this appliance be modified.
Parts removed for servicing should be replaced prior to
operating this appliance again.
5. Installation and any repairs to this appliance should be carried out by a qualified service person. A professional service
person should be contacted to inspect this appliance annually. Make it a practice to have all of your gas appliances
checked annually. More frequent cleaning may be required
due to excess lint and dust from carpeting, bedding material,
etc.
6. Control compartments, burners and air passages in this ap
pliance should be kept clean and free of dust and lint. Make
sure that the gas valve and pilot light are turned off before
you attempt to clean this unit.
7. The venting system (chimney) of this appliance should be
checked at least once a year and if needed your venting
system should be cleaned.
8. Keep the area around your appliance clear of combustible
materials, gasoline and other flammable vapor and liquids.
This appliance should not be used as a drying rack for clothing, nor should Christmas stockings or decorations be hung
in the area of it.
9. Under no circumstances should any solid fuels (wood, coal,
paper or cardboard etc.) be used in this appliance.
10. Whether the zero clearance kit is installed directly on carpeting, vinyl tile or any combustible material other than wood,
this heater must be installed on a metal or wood panel
extending the full width and depth of the heater. The insert
can not be installed directly onto or into combustibles.
This appliance may be installed in an aftermarket permanently located, manufactured (mobile) home, where
not prohibited by local codes.
This appliance is only for use with the type of gas indicated on the rating plate.
Proposition 65 Warning: Fuels used in gas, woodburning or oil fired appliances, and the products of
combustion of such fuels, contain chemicals known to
the State of California to cause cancer, birth defects
and other reproductive harm.
California Health & Safety Code Sec. 25249.6
10005360
WARNING: Check with your electronics manufacturer
before installing a television or other electronic device above this fireplace.
IMPORTANT:
PLEASE READ THE FOLLOWING CAREFULLY
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 your gas fireplace to give off some odor
the first time it is burned. This is due to the curing of the paint
and any undetected oil from the manufacturing process.
Please ensure that your room is well ventilated - open
all windows.
It is recommended that you burn your fireplace for at least ten
(10) hours the first time you use it. If optional fan kit has been
installed, place fan in the "OFF" position during this time.
Locating Your Gas Fireplace Insert
with Zero Clearance Kit
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Fig. 1 Locating unit with zero clearance kit.
A) Flat on wall B) Cross corner
C) Island D) *Room divider
E) *Flat on wall corner F) Chase installation
NOTE: (Fig. 1)
* When you install your fireplace in (D) Room divider or (E) Flat
on wall corner positions, a minimum of 6 (X) inches (153mm)
clearance must be maintained from the perpendicular wall and
the outer edge of the trim.
Insert Applications
Before installing the gas fireplace insert, consideration must be
given to the functioning needs of the fireplace. The size of the
fireplace cavity (min. 25
343 mm) for the LHEC20 and LHER20, 28³⁄₄"W x 21"H x 15¹⁄₂"D
(730 x 533 x 394 mm) for LHEC30 and LHER30), the design
of the chimney for effective venting should be determined. The
availability of the gas supply as well as electricity for the insert
fan must be confirmed.
Your Natural Vent Insert unit is designed to
be vented vertically with a minimum height
of 12' (4 m) and a maximum vertical height of
35' (11 m).
¹⁄₄"W x 17¹⁄₄"H x 13¹⁄₂" D (641 x 438 x
FP1249a
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LHE Series Natural Vent Insert
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Fireplace & Trim Dimensions
Zero Clearance Kit
Insulation
Minimum Fireplace
Insert Opening
1 = LHESSB
2 = LHESLB/LHEABSL/LHESLGA
3 = LHECSLB/LHECSLMB/LHECSLSA
4 = LHEACNSS
5 = LHETCK
LHEC20 LHER20 LHEC30 LHER30
A-1
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B-1 30³⁄₄" (781 mm) 30³⁄₄" (781 mm) 38¹⁄₄" (972 mm) 38¹⁄₄" (972 mm)
R
A-2 24¹⁄₄" (616 mm) 24¹⁄₄" (616 mm) 28³⁄₁₆" (716 mm) 28³⁄₁₆" (716 mm)
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B-2 37¹⁄₂" (952 mm) 37¹⁄₂" (952 mm) 41" (1042 mm) 41" (1042 mm)
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A-3 24¹⁄₄" (616 mm) 24¹⁄₄" (616 mm) 28¹⁄₄" (717 mm) 28¹⁄₄" (717 mm)
B-3 38¹⁄₈" (968 mm) 38¹⁄₈" (968 mm) 41¹¹⁄₁₆" (1059 mm) 41¹¹⁄₁₆" (1059 mm)
A-4 20³⁄₄" (527 mm) 20³⁄₄" (527 mm) 24³⁄₄" (629 mm 24³⁄₄" (629 mm)
B-4 30⁷⁄₈" (784 mm) 30⁷⁄₈" (784 mm) 34⁷⁄₁₆" (875 mm) 34⁷⁄₁₆" (875 mm)
A-5 28" (711 mm) 28" (711 mm) 32¹⁄₄" (819 mm) 32¹⁄₄" (819 mm)
B-5 45" (1143 mm) 45" (1143 mm) 49" (1245 mm) 49" (1245 mm)
C 25⁵⁄₈" (651 mm) 25⁵⁄₈" (651 mm) 29³⁄₁₆" (741 mm) 29³⁄₁₆" (741 mm)
D 16¹⁄₂" (419 mm) 16" (406 mm) 16⁷⁄₈" (428 mm) 16¹⁄₄" (412 mm)
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E 35" (889 mm) 35" (889 mm) 35" (889 mm) 35" (889 mm)
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F 26⁵⁄₈" (676 mm) 26⁵⁄₈" (676 mm) 26⁵⁄₈" (676 mm) 26⁵⁄₈" (676 mm)
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G 13" (331 mm) 14" (355 mm) 15¹⁄₂" (394 mm) 16¹⁄₂" (419 mm)
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H 17" (432 mm) 17¹⁄₄" (438 mm) 20³⁄₄" (527 mm) 20³⁄₄" (527 mm)
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I 13³⁄₈" (340 mm) 13¹⁄₈" (333 mm) 16" (406 mm) 16" (406 mm)
A
J 19¹⁄₈" (486 mm) 19³⁄₈" (492 mm) 23¹⁄₄" (590 mm) 23¹⁄₄" (590 mm)
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K 15" (381 mm) 15" (381 mm) 17" (432 mm) 18" (457 mm)
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L 10¹⁄₂" (266 mm) 11¹⁄₂" (292 mm) 12³⁄₄" (324 mm) 13³⁄₄" (349 mm)
M 8¹⁄₂" (216 mm) 8¹⁄₂" (216 mm) 8¹⁄₂" (216 mm) 8¹⁄₂" (216 mm)
N 37¹⁄₄" (946 mm) 37¹⁄₄" (946 mm) 37¹⁄₄" (946 mm) 37¹⁄₄" (946 mm)
O 19¹⁄₈" (486 mm) 19¹⁄₈" (486 mm) 19¹⁄₈" (486 mm) 19¹⁄₈" (486 mm)
P 27¹⁄₄" (692 mm) 27¹⁄₄" (692 mm) 27¹⁄₄" (692 mm) 27¹⁄₄" (692 mm)
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Q 17¹⁄₄" (438 mm) 17¹⁄₄" (438 mm) 21" (533 mm) 21" (533 mm)
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R 25¹⁄₄" (641 mm) 25¹⁄₄" (641 mm) 28³⁄₄" (730 mm) 28³⁄₄" (730 mm)
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S 13¹⁄₂" (343 mm) 14" (355 mm) 16" (406 mm) 16¹⁄₂" (419 mm)
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T 17" (432 mm) 17" (432 mm) 17³⁄₄" (451 mm) 17³⁄₄" (451 mm)
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U 13³⁄₄" (349 mm) 14" (355 mm) 16" (406 mm) 16¹⁄₂" (419 mm)
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V 18" (457 mm) 18" (457 mm) 21⁵⁄₁₆" (541 mm) 21⁵⁄₁₆" (541 mm)
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20⁷⁄₈" (530 mm) 20⁷⁄₈" (530 mm) 26³⁄₄" (680 mm) 26³⁄₄" (680 mm)
Q - Fireplace opening height
R - Fireplace opening width
S - Depth of insert
T - Firebox width at insert depth(S)
Gas Inlet KnockoutAir Circulating Channel
U - Firebox depth at insert back height (V)
V - Insert back height
NOTE: LHESLGA is only available for
Model LHEC30 and LHER30
Mantels
24" Min.
(610mm)
35"
(889mm)
37¹⁄₄" (946mm)
27¹⁄₄" (692mm)
19¹⁄₈"
(486mm)
When the unit is installed into a woodburning fireplace,
the minimum distance the mantel can be placed above
the fireplace is governed by local building codes applicable to woodburning fireplaces. Consult local authorities having jurisdiction for these clearances.
For applications requiring the use of a Zero Clearance
Kit, the minimum height a mantel can be installed above
the fireplace is 24" (610mm) from the top of the upper
louvres. The maximum mantel depth is 8" (200mm).
(Fig. 2)
The underside of the mantel will become
warm. Use only finishes which are heat
resistant and do not discolor.
LHE Series Natural Vent Insert
Air Inlet Channel
Drywall
FP1325
Fig. 2 Minimum mantel height above fireplace.
Framing & Finishing
For Zero Clearance Kit applications, it is important to
determine the finished facing material before beginning
to frame. This will allow for the thickness of the finishing
material between the frame and the fireplace trim.
Similarly, consideration must be given to the 1" inch
depth of the air inlet channel sitting on the fireplace
base. Finishing material for the hearth should be flush
with the top of the air inlet channel.
If the fireplace is installed at floor level a noncombustible hearth must extend a minimum 12" (305mm) in
front of the fireplace.
If the fireplace is recessed into the wall and at least 12"
(305mm) above floor level, no hearth is required.
The use of wallpaper adjacent to this fireplace is not recommended as high temperatures given off by this fireplace may
adversely effect the binders in the adhesive used to apply the wallpaper.
Finish Wall
Fig. 3 LHE insert framing dimensions.
Decorative Trim Kit
FP1351
NOTE: Insulating around the fireplace will result in
overheating and possible malfunctioning of the circulating fan.
Zero Clearance Applications
An alternate air supply is recommended
with this component.
For installation other than in existing woodburning fireplaces such as new construction or renovation projects, a Zero Clearance Kit must be used. The
kit enables these inserts to be installed in combustible
environments. Whenever using a Zero Clearance Kit,
consideration must be given to the dimensions of the
Zero Clearance Kit and the requirements of the Air Kit.
NOTE: If a Zero Clearance Kit is required for models LHEC20/LHER20/LHEC30/LHER30 Natural Vent
Inserts, only the CFM Corporation zero clearance
kit HEZC is approved to be used. When using the
HEZC with insert models LHEC20 or LHER20, the
Trim Closure Kit, LHE20TCK, must also be installed.
10005360
5
LHE Series Natural Vent Insert
Gas Specifications
Max. Min. Air Shutter
Gas Input Input Setting
Model Fuel Control Btu/h Btu/h Front Rear
LHEC20RN Nat. Gas Millivolt 20,000 14,000 Fully Closed
Hi/Lo Open 50%
LHEC20RP Prop. Gas Millivolt 20,000 15,000 Fully Fully
Hi/Lo Open Open
LHEC20RFN Nat. Gas Comfort 20,000 14,000 Fully Closed
Control Open 50%
LHEC20RFP Prop. Gas Comfort 20,000 15,000 Fully Fully
Control Open Open
LHER20RN Nat. Gas Millivolt 20,000 14,000 Fully Closed
Hi/Lo Open 50%
LHER20RP Prop. Gas Millivolt 20,000 15,000 Fully Closed
Hi/Lo Open 50%
LHEC30RN Nat. Gas Millivolt 30,000 21,000 Fully Closed
Hi/Lo Open 15%
LHEC30RP Prop. Gas Millivolt 30,000 22,500 Fully Closed
Hi/Lo Open 15%
LHEC30RFN Nat. Gas Comfort 30,000 21,000 Fully Closed
Control Open 15%
LHEC30RFP Prop. Gas Comfort 30,000 22,500 Fully Closed
Control Open 15%
LHER30RN Nat. Gas Millivolt 30,000 21,000 Fully Closed
Hi/Lo Open 15%
LHER30RP Prop. Gas Millivolt 30,000 22,500 Fully Closed
Hi/Lo Open 15%
Units:
LHEC20RN GICN4B0 LHEC30RN GINN3H0
LHEC20RP GICL4B0 LHEC30RP GINL3H0
LHEC20RFN J34KC0 LHEC30RFN K32KC0
LHER20RN GIRN3B0 LHEC30RFP K32LC0
LHER20RP GIDN3B0 LHER30RN K31A30
Gas Inlet & Manifold Pressures
Natural LP
Minimum Inlet Pressure 5.5"
Maximum Inlet Pressure 14.0"
Manifold Pressure 3.5"
W.C. 11.0" W.C.
W.C. 14.0" W.C.
W.C. 10.0" W.C.
Do not use this appliance if any part of it
has been under water. Immediately call a
qualified service technician to inspect the
unit and replace any part of the control
which has been under water.
High Elevations
Input ratings are shown in BTU per hour and are
certified without deration for elevations up to
4,500 feet (1,370m) above sea level.
For elevations above 4,500 feet (1,370m) in USA,
installations must be in accordance with the
current ANSI Z223.1/NFPA 54 and/or local codes
having jurisdiction.
In Canada, please consult provincial and/or local
authorities having jurisdiction for installations at
elevations above 4,500 feet (1,370m).
These gas inserts are approved for installation
in solid fuel burning masonry or zero clearance
fireplaces.
LHEC20 / LHER20 / LHEC30 / LHER30
Certified To
ANSI Z 21.88-2005 / CSA 2.33-2005
Vented Gas Fireplace Heaters
Preparation
Before beginning, remove glass door and logs from
unit. Also check to make sure there is no hidden
damage to the unit. Take a minute and plan out the
gas,venting and electrical route. It is best to start with
the gas line first followed by the chimney liner. (Refer to
Page 9)
Gas Line Installation
When purging the gas line, the front glass
must be removed.
If gas piping from the source to the heater
location has not been accomplished, install the required
pipe. Consult local plumbing code to assure proper pipe
size.
The gas pipeline can be brought in through the rear or
the base of the heater.
NOTE: The gas line connection can be made of either
properly tinned 3/8" copper tubing, 1/2" rigid pipe or
an approved flex connector then reduced to 3/8" to the
heater. Some municipalities have additional local codes,
it is always best to consult your local authority and the
CSA- B149.1 installation code.
U.S. Installations consult the current National Fuel
Gas Code, ANSI Z223.1/NFPA 54.
Always check for gas leaks with a mild
soap and water solution. Do not use an
open flame for leak testing.
The gas control is equipped with a captured screw
type pressure test point, therefore it is not necessary to
provide a 1/8" test point up stream of the control.
When using copper or flex connector, use only
approved fittings.
using black iron pipe so the gas line can be easily
disconnected for burner or fan servicing. See gas
specifications for pressure details and ratings. NOTE:
If flex connector is used, it must be kept inside of the
heater.
Always provide a union when
6 10005360
LHE Series Natural Vent Insert
1/2" Gas Supply
1/2" x 3/8" Shut Off Valve
3/8" Nipple
3/8" Union
3/8" Nipple
FP297
Fig. 4 Typical gas supply installation.
Gas Supply Pressures
This heater must be isolated from the gas supply piping
system by closing its individual manual shut-off valve
during any pressure equal to or less than 1/2 psig
(3.45kPa).
The heater and its individual shut-off valve must be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in
excess of 1/2 psig (3.45kPa).
Fan Kit
115 volt, 60 Hz. 56w (Model FK24)
NOTE: The LHER20 and LHER30 are not designed for
a fan kit.
The fan kit includes the following: fan, temperature
sensor, speed control and a 6 ft. cord. The following
explains how to start and set the fan for automatic
operation.
1. Plug in the electrical cord.
2. Start gas fire - see lighting procedures.
3. Turn on fan speed control.
4. Wait until the unit has warmed up sufficiently to
activate the temperature sensor, approx. 5-10
minutes.
5. Once fan starts, adjust speed control to desired fan
speed. The fan will now automatically come on every
time the fireplace is in operation. Should the fan not
be needed simply turn off the speed control.
The appliance, when installed must be
electrically connected and grounded in
accordance with local codes or, in the absence of local codes, with the current CSA
C22.1 Canadian Electrical Code.
U.S. Installations, follow local codes and the
National Electrical Code, ANSI/NFPA No. 70.
Should this fan require servicing, the
power supply must be disconnected. For
rewiring of any replacement components
refer to Figure 6.
Fan Removal Instructions
1. Turn off gas and electricity.
2. Remove the front glass.
3. Remove the logs.
CAUTION: Logs may be hot!
4. For Model LHEC20: remove burner assembly and
bracket rear log. For Model LHEC30: remove bracket rear log and cover fan.
5. Remove the fan mounting nuts (2 nuts). (Fig. 5)
6. Slip off the electrical connector at the motor.
7. Lift out the fan.
8. To reinstall reverse procedure.
Screw
Stud
Thermal Sensor is
Attached to Burner
Base
Screw Stud
Fan Speed Control/Junction Box
Fig. 5 Fan location.
Temperature Sensor
Speed
Control
Black
White
Ground
Fig. 6 Wiring diagram RN/RP. NOTE: For comfort valve wir-
ing diagram refer to Page 18, Figure 27.
Fan is Installed
at the Back of the
Air Intake Box
FP1252
Fan
FP394
Installation of Trim Switch
for RN/RP Gas Valves
1. Thread wire through openings on the right side of fireplace. Do not cut wire or insulation on metal edges.
2. Insert ON/OFF switch with wiring assembly into the
bracket switch with the pre-punched opening mounted
on the right side of the trim. (Fig. 7)
3. For left side installation, relocate the bracket switch
to the left side of the trim kit and repeat Step 2. (Fig.
8)
4. Connect wiring from the switch to the gas valve (Fig.
9a & b).
10005360
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LHE Series Natural Vent Insert
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Right Side Installation
On/Off
Switch Assembly
Left Side Installation
On/Off
Switch As-
sembly
Venting Installation
1. The fireplace may be installed in and vented through
any solid fuel fireplace that has a minimum fireplace
opening 25¹⁄₄"W x 17¹⁄₂" H x 13¹⁄₂"D (641 x 438 x 343
mm) for LHEC20 and LHER20 or 28³⁄₄"W x 21"H
x 15¹⁄₂"D (730 x 533 x 394 mm) for LHEC30 and
LHER30 and has been installed in accordance with
Wiring from
Millivolt Gas
Valve
Fig. 7 Insert ON/OFF switch with wiring assembly into
bracket switch.
FP1330
the National, Provincial/State and local building
codes and is constructed of noncombustible
materials.
2. In order to gain minimum gas insert fireplace
opening requirement, if the fire brick refractory is
removed from a factory built fireplace, a minimum
of 1/4" air space is required between the gas insert
fireplace's outer casing and the inner wall of the
factory built fireplace.
3. In order to obtain the best performance, safety and
efficiency for the gas insert fireplace, the LHEC30
and LHER30 gas insert must be installed with an
approved 4" diameter flue liner. The LHER20 and
LHEC20 should be installed with an approved 3"
diameter flue liner as per current CSA-B149.1 or
FP1331
Fig. 8 For left side installation, reverse switch position in
bracket.
National Fuel Gas Code ANSI Z223.1/NFPA 54.
4. Any flue damper must be removed or blocked open.
5. The chimney must be clean and in good working
order and constructed of noncombustible materials.
SIT Valve
6. Make sure that all chimney cleanouts fit properly so
air cannot leak into the chimney.
Thermopile
7. Install the appliance without trim frame and make all
gas fittings and electrical connections.
8. Install the decorative trim frame. Please refer to the
Frame Assembly instructions.
Installer must attach red warning plate
with screws supplied with the gas fireplace
insert to the inside of the firebox of the
fireplace into which the gas fireplace insert
FP382a
Fig. 9a On/Off switch or millivolt thermostat.
is installed.
Cutting any sheet metal parts of the fireplace, in which the gas fireplace insert is
Honeywell Valve
to be installed, is prohibited.
If the factory-built fireplace has no gas
access hole(s) provided, an access hole
of 1¹⁄₂ (37.5 mm) or less may be drilled
through the lower sides or bottom of the
firebox in a proper workmanship-like manner. This access hole must be plugged
with a noncombustible insulation after the
gas supply line has been installed.
FP1218
Fig. 9b On/Off switch wiring.
CAUTION: Do not wire millivolt remote
wall switch for gas fireplace to a 120v
power supply.
WARNING
Some factory-built fireplaces have air passages
on face of fireplace for zero clearance capabilities.
Under no circumstances should these passages
be blocked.
8 10005360
LHE Series Natural Vent Insert
2' Min.
2'
(610mm)
Min.
3'
Min.
0 To 10'
3'
(914mm)
Min.
0 To 10'
Reference
Point
(3m)
Zero clearance kit minimum clearance to combustibles
materials is 1" (25 mm) for B Vent (use of single wall
vent is not allowed.)
As with any natural drafted appliances, the vent cap
must always extend a minimum of 2' (610 mm) above
any structure within a 10' (3 m) horizontal plane. (Fig.
10)
AC246a
Fig. 10 Example of the 2', 3', 10' rule.
A minimum 12' (3.7 m) vent height is required to effectively vent these fireplaces.
If the fireplace lintel is wider than 8"
(203 mm), the height of the fireplace open
ing must be 25" (635 mm) to allow for a 90°
offset elbow to be installed.
Chimney Liner
Chimney
Liner
Screw
Damper
Clamp
ST1354
Damper
Draft
Hood
Fig. 11 Remove flue collar plate and attach to flue collar.
Clamp
Draft Relief Opening
This insert is equipped with a draft-relief opening which
receives its dilution air supply through the opening at
the back of the insert. These openings must not be
obstructed or entered any way. (Fig. 12)
-
Common Flue Installations
In some areas it is possible to vent more than one gas
appliance into the same flue. You must ensure that the
flue being shared has the proper capacity to handle
both appliances. Check installation codes for venting
capacity information.
As always it is best to check with the authority having
jurisdiction prior to commencement of the installation.
Liner Installation
Insert liner from top of chimney through the damper
opening and attach to 3" flue collar for LHEC20 and
LHER20 and 4" flue collar for LHEC30 and LHER30.
For best results use three (3) sheet metal screws and a
hose clamp.
For natural draft inserts, packing noncombustible fiberglass insulation around the liner in the damper area will
isolate the fireplace cavity from the chimney and prevent drafts and noises during operation.
In case the fireplace opening is only minimum height
(17¹⁄₄" (438 mm) for LHEC20 and LHER20; 21"
(533mm) for LHEC30 and LHER30) and access from
the front is not possible, remove the flue collar plate
- unscrew and slide out from the back of the unit. Now
attach the liner to the flue collar, lift up and slide flue
collar plate back onto the unit top. It is important that
the plate is completely inserted and the front screw is
fastened again in order to line up the flue outlet and the
liner properly. (Fig. 11)
10005360
Test Chimney Draw
1. A "Chimney Draw" test must be conducted before
the installation is complete.
2. Close all doors and windows in the home and start
exhaust fans in he kitchen and bathroom.
3. Light unit and operate for 5 minutes.
4. Hold an ignited match or cigarette in front of the unit.
Refer to drawing for the location of the draft hood
opening. (Fig. 12)
5. Check to make sure smoke from the match or
cigarette is drawn into the fireplace. If it is not, turn
the unit off and check for causes creating the lack of
adequate draft.
Test for draft at these two
openings.
FP1355
Fig. 12 Hold an ignited match in front of fireplace.
9
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