Vermont Castings LHER20 Mounting instructions

10005360 5/06 Rev. 5
Natural Vent Insert
Models: LHER20
LHEC20
LHER30
LHEC30
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CERTIFIED
DO NOT STORE OR USE
GASOLINE OR OTHER
FLAMMABLE VAPORS AND
LIQUIDS IN THE VICINITY OF
THIS OR ANY OTHER
APPLIANCE.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any 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.
WARNING!
IF THE INFORMATION IN THIS
MANUAL IS NOT FOLLOWED
EXACTLY, A FIRE OR EXPLO-
SION MAY RESULT CAUSING
PROPERTY DAMAGE, PER-
SONAL INJURY OR LOSS OF
LIFE.
PLEASE READ THIS MANUAL
BEFORE INSTALLING AND
USING APPLIANCE
INSTALLER/CONSUMER
SAFETY INFORMATION
FOR YOUR SAFETY
Installation and service must
be performed by a qualified
installer, service agency or
the gas supplier.
Homeowner's Installation and
Operating Manual
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.

210005360
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 ................................................................................................3
Locating Your Fireplace Insert ............................................................................................................3
Insert Applications ..............................................................................................................................3
Fireplace & Trim Dimensions .............................................................................................................4
Mantels ...............................................................................................................................................5
Framing & Finishing ............................................................................................................................5
Zero Clearance Applications ...............................................................................................................5
Gas Specifications ..............................................................................................................................6
Gas Inlet & Manifold Pressures ..........................................................................................................6
High Elevations ...................................................................................................................................6
Preparation .........................................................................................................................................6
Gas Line Installation ...........................................................................................................................6
Gas Supply Pressures ........................................................................................................................7
Fan Kit ................................................................................................................................................7
Fan Removal Instructions ...................................................................................................................7
Installation of Trim Switch for RN/RP Gas Valves ..............................................................................7
Venting and Installation ......................................................................................................................8
Common Flue Installations .................................................................................................................9
Liner Installation .................................................................................................................................9
Draft Relief Opening ...........................................................................................................................9
Test Chimney Draw .............................................................................................................................9
Vent Safety System ..........................................................................................................................10
Vent Safety Switch Access ...............................................................................................................10
Ceramic Refractory Installation ........................................................................................................10
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 ............................................................................................................12
Flame Adjustment ............................................................................................................................12
Flame Characteristics .......................................................................................................................12
First Firing .........................................................................................................................................13
Lighting & Operating Instructions ....................................................................................................14
Troubleshooting Gas Control (820 Millivolt Gas Valve) ....................................................................15
Troubleshooting Gas Control (Honeywell) .......................................................................................16
Instructions for RF Comfort Control Valve ........................................................................................17
Maintenance
Cleaning the Standing Pilot Control System .....................................................................................21
Trim Cleaning ...................................................................................................................................21
Replacement Parts ..............................................................................................................................................22
Optional Accessories
Remote Controls ...............................................................................................................................25
Zero Clearance Kit ............................................................................................................................25
Trim Options .....................................................................................................................................25
Warranty ...............................................................................................................................................................26
EnerGuide ...........................................................................................................................................................28

3
10005360
LHE Series Natural Vent Insert
This gas appliance should be installed by a qualified installer in
accordance with local building codes and with current CSA-
B149.1 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 car-
ried out by a qualified service person. A professional service
person should be contacted to inspect this appliance an-
nually. 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 cloth-
ing, 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 carpet-
ing, 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.
Installation & Operating Instructions
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
Proposition 65 Warning: Fuels used in gas, wood-
burning 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
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FP1249a
locating DV unit
with zero clearance kit
4/03
FP1249a
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.
Before installing the gas fireplace insert, consideration must be
given to the functioning needs of the fireplace. The size of the
fireplace cavity (min. 25¹⁄₄"W x 17¹⁄₄"H x 13¹⁄₂" D (641 x 438 x
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).
Insert Applications
This appliance may be installed in an aftermarket per-
manently located, manufactured (mobile) home, where
not prohibited by local codes.
This appliance is only for use with the type of gas indi-
cated on the rating plate.
WARNING: Check with your electronics manufacturer
before installing a television or other electronic de-
vice above this fireplace.

410005360
LHE Series Natural Vent Insert
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5360
LHE
ac spces
5/03

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QVT
FP1248
Minimum fireplace
opening
1/03
Q - Fireplace opening height
R - Fireplace opening width
S - Depth of insert
T - Firebox width at insert depth(S)
LHEC20 LHER20 LHEC30 LHER30
A-1 20⁷⁄₈" (530 mm) 20⁷⁄₈" (530 mm) 26³⁄₄" (680 mm) 26³⁄₄" (680 mm)
B-1 30³⁄₄" (781 mm) 30³⁄₄" (781 mm) 38¹⁄₄" (972 mm) 38¹⁄₄" (972 mm)
A-2 24¹⁄₄" (616 mm) 24¹⁄₄" (616 mm) 28³⁄₁₆" (716 mm) 28³⁄₁₆" (716 mm)
B-2 37¹⁄₂" (952 mm) 37¹⁄₂" (952 mm) 41" (1042 mm) 41" (1042 mm)
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)
E 35" (889 mm) 35" (889 mm) 35" (889 mm) 35" (889 mm)
F 26⁵⁄₈" (676 mm) 26⁵⁄₈" (676 mm) 26⁵⁄₈" (676 mm) 26⁵⁄₈" (676 mm)
G 13" (331 mm) 14" (355 mm) 15¹⁄₂" (394 mm) 16¹⁄₂" (419 mm)
H 17" (432 mm) 17¹⁄₄" (438 mm) 20³⁄₄" (527 mm) 20³⁄₄" (527 mm)
I 13³⁄₈" (340 mm) 13¹⁄₈" (333 mm) 16" (406 mm) 16" (406 mm)
J 19¹⁄₈" (486 mm) 19³⁄₈" (492 mm) 23¹⁄₄" (590 mm) 23¹⁄₄" (590 mm)
K 15" (381 mm) 15" (381 mm) 17" (432 mm) 18" (457 mm)
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)
Q 17¹⁄₄" (438 mm) 17¹⁄₄" (438 mm) 21" (533 mm) 21" (533 mm)
R 25¹⁄₄" (641 mm) 25¹⁄₄" (641 mm) 28³⁄₄" (730 mm) 28³⁄₄" (730 mm)
S 13¹⁄₂" (343 mm) 14" (355 mm) 16" (406 mm) 16¹⁄₂" (419 mm)
T 17" (432 mm) 17" (432 mm) 17³⁄₄" (451 mm) 17³⁄₄" (451 mm)
U 13³⁄₄" (349 mm) 14" (355 mm) 16" (406 mm) 16¹⁄₂" (419 mm)
V 18" (457 mm) 18" (457 mm) 21⁵⁄₁₆" (541 mm) 21⁵⁄₁₆" (541 mm)
1 = LHESSB
2 = LHESLB/LHEABSL/LHESLGA
3 = LHECSLB/LHECSLMB/LHECSLSA
4 = LHEACNSS
5 = LHETCK
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Fireplace & Trim Dimensions
Minimum Fireplace
Insert Opening
U - Firebox depth at insert back height (V)
V - Insert back height
NOTE: LHESLGA is only available for
Model LHEC30 and LHER30
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5360
LHE spces
5/03
Insulation
Gas Inlet KnockoutAir Circulating Channel
Zero Clearance Kit

5
10005360
LHE Series Natural Vent Insert
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 appli-
cable to woodburning fireplaces. Consult local authori-
ties 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.
Mantels
FP1325
Insert mantel
height
4/1/03 djt
24" Min.
(610mm)
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 noncombus-
tible 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 fire-
place is not recommended as high tem-
peratures given off by this fireplace may
adversely effect the binders in the adhe-
sive used to apply the wallpaper.
NOTE: Insulating around the fireplace will result in
overheating and possible malfunctioning of the circulat-
ing fan.
Zero Clearance Applications
An alternate air supply is recommended
with this component.
For installation other than in existing wood-
burning fireplaces such as new construction or renova-
tion 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 mod-
els 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.
35"
(889mm)
37¹⁄₄" (946mm)
FP1251
Insert framing
and finishing
1/03
27¹⁄₄" (692mm)
19¹⁄₈"
(486mm)
Air Inlet Channel
Drywall
Finish Wall Decorative Trim Kit
FP1351
Fig. 3 LHE insert framing dimensions.

610005360
LHE Series Natural Vent Insert
Natural LP
Minimum Inlet Pressure 5.5" W.C. 11.0" W.C.
Maximum Inlet Pressure 14.0" W.C. 14.0" W.C.
Manifold Pressure 3.5" W.C. 10.0" W.C.
Gas Inlet & Manifold Pressures
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.
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. Always provide a union when
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.
These gas inserts are approved for installation
in solid fuel burning masonry or zero clearance
fireplaces.
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).
Units:
LHEC20RN GICN4B0 LHEC30RN GINN3H0
LHEC20RP GICL4B0 LHEC30RP GINL3H0
LHEC20RFN J34KC0 LHEC30RFN K32KC0
LHER20RN GIRN3B0 LHEC30RFP K32LC0
LHER20RP GIDN3B0 LHER30RN K31A30
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%

7
10005360
LHE Series Natural Vent Insert
FP297
INSTA VENT FREE
R MODEL GAS SUPPLY
8/24/96
1/2" Gas Supply
1/2" x 3/8" Shut Off Valve
3/8" Nipple
3/8" Union
FP297
Fig. 4 Typical gas supply installation.
3/8" Nip-
ple
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 ab-
sence 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 brack-
et 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.
FP1252
FK24 install
1/03
Thermal Sensor is
Attached to Burner
Base
Fan is Installed
at the Back of the
Air Intake Box
Fan Speed Control/Junction Box
Screw
Stud
Screw Stud
FP1252
Fig. 5 Fan location.
FP394
WIRING DIAGRAM
11/20/96
Fan
Temperature Sensor
Speed
Control
Black
White
Ground
FP394
Fig. 6 Wiring diagram RN/RP. NOTE: For comfort valve wir-
ing diagram refer to Page 18, Figure 27.
Installation of Trim Switch
for RN/RP Gas Valves
1. Thread wire through openings on the right side of fire-
place. 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).

810005360
LHE Series Natural Vent Insert
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
is installed.
Cutting any sheet metal parts of the fire-
place, in which the gas fireplace insert is
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 man-
ner. This access hole must be plugged
with a noncombustible insulation after the
gas supply line has been installed.
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
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
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.
6. Make sure that all chimney cleanouts fit properly so
air cannot leak into the chimney.
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.
CAUTION: Do not wire millivolt remote
wall switch for gas fireplace to a 120v
power supply.
P
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THTP TP TH
FP382a
REMOTE SWITCH WIRING - NVC
1/03
SIT Valve
Thermopile
FP382a
Fig. 9a On/Off switch or millivolt thermostat.
TPTH TH
TP
FP1218
Remote switch
wiring
8/02
FP1218
Fig. 9b On/Off switch wiring.
Honeywell Valve
Fig. 8 For left side installation, reverse switch position in
bracket.
FP1331
on/off switch
4/03
FP1331
WARNING
Some factory-built fireplaces have air passages
on face of fireplace for zero clearance capabilities.
Under no circumstances should these passages
be blocked.
FP1330
Switch assy
4/03
Left Side Installation
Right Side Installation
On/Off
Switch As-
sembly
Wiring from
Millivolt Gas
Valve
Fig. 7 Insert ON/OFF switch with wiring assembly into
bracket switch.
On/Off
Switch As-
sembly
FP1330

9
10005360
LHE Series Natural Vent Insert
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)
2' Min.
2'
(610mm)
Min.
3'
Min.
0 To 10'
3'
(914mm)
Min.
0 To 10'
AC246
4/1/96
Reference
Point
(3m)
Fig. 10 Example of the 2', 3', 10' rule.
AC246a
A minimum 12' (3.7 m) vent height is re-
quired to effectively vent these fireplaces.
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 fiber-
glass insulation around the liner in the damper area will
isolate the fireplace cavity from the chimney and pre-
vent 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)
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.
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)
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.
FP1354
Flue outlet
5/03
Damper
Draft
Hood Clamp
Chimney
Liner
Screw
Damper
Chimney Liner
Clamp
ST1354
Fig. 11 Remove flue collar plate and attach to flue collar.
Fig. 12 Hold an ignited match in front of fireplace.
Test for draft at these two
openings.
FP1355

10 10005360
LHE Series Natural Vent Insert
Ceramic Refractory Installation
1. Remove front glass.
2. Remove logs from unit.
3. Remove refractory from package.
Refractory are fragile and must be handled
with care. Where at all possible, two hands
should be used when handling.
4. Take center refractory and tilt so bottom edge seats
onto the rear log bracket at the back wall of the fire-
place. (Fig. 15)
5. Press center refractory to back side of fireplace and
hold in place.
6. Take left or right refractory and align it so leading
edge faces outward. (Place refractory in fireplace
side and slide it back to support the center refrac-
tory.)
7. Repeat step 6 for remaining side refractory.
8. Fasten bracket supports against refractory top to
hold side in place.
When side refractory is installed correctly,
the center refractory will be supported by
the side refractory.
FP1329
LHEDV
ceramic refractory
4/03
Leading Edge Leading Edge
Left Side Right Side
Center
FP1329
Fig. 15 Ceramic refractory.
Bottom Edge
Blocked Flue Shut Off System
These inserts are equipped with a blocked flue shut off
switch. This switch is factory installed, wired and tested.
Check and make sure the switch and wires are in the
proper position. The shut off switch is heat activated
and wired in series with the pilot system. (Fig. 13)
Operation of this fireplace when not con-
nected to a properly installed and main-
tained venting system or tampering with
the blocked flue shut-off system can result
in carbon monoxide (CO) poisoning and
possible death.
Blocked Flue Shut Off Switch Access
The shut off switch system of these inserts is designed
to be accessed from either inside the combustion
firebox chamber or outside at the back of the inserts
fireplace.
Access to the shut off switch from outside of the
insert
1. Turn off the unit and let it cool down if it has been
operating.
2. Shut off the gas and the electrical source to the fire-
place.
3. Disconnect the gas line and the draft hood of the
fireplace.
4. Slide the fireplace out.
Access to the shut off switch directly from inside
the combustion firebox chamber.
1. Turn off the unit and let it cool down if it has been
operating.
2. Remove the log set and remove the ceramic refrac-
tory if installed.
3. Remove the firebox baffle. (Fig. 14)
4. Remove the shut off switch cover fastened with four
(4) screws located at the right upper corner of the
firebox.
5. This time you can access the shut off switch as-
sembly through the rectangular opening. Remove
the screw that secures the switch assembly. Holding
the bracket switch carefully pull out the entire switch
assembly.
NOTE: The shut off switch cover was attached with the
gasket cover. Before installing the gasket cover back in
place, inspect and make sure the gasket is not dam-
aged. If the gasket is damaged, install a new gasket.
FP1352
Vent safety switch
5/03
Screws
Cover
Safety
Switch
Gasket Cover
Safety Switch
Bracket Shut
Off Switch
Screw must be removed prior
to pulling the switch assembly
Screws
Firebox Baffle
Screws
FP1352
Fig. 14 Access to the blocked flue shut off swtich from inside
combustion chamber.
FP1356
Vent safety switch
location
5/03
Blocked Flue Shut Off
Switch
Bracket
FP1356
Fig. 13 Blocked flue shut off switch location.

11
10005360
LHE Series Natural Vent Insert
Operating Instructions
General Glass Information
Only ceramic glass approved by CFM Cor-
poration may be used for replacement on
this unit.
1. The use of substitute glass will void all product
warranties.
2. Care must be taken to avoid breakage of the glass.
3. Under no circumstances should this appliance be
operated without glass properly installed, or with any
cracked or broken glass. Replacement of any glass
assembly as supplied by the manufacturer should be
done by a licensed qualified service person.
Louvre Removal
To remove
louvre, lift louvre
up and then pull
out.
(Fig. 16)
Glass Cleaning
It will be necessary to clean the glass periodically.
During start-up condensation, which is normal, forms on
the inside of the glass and causes lint, dust and other
airborne particles cling to the glass surface. Also initial
paint curing may deposit a slight film on the glass. It is
therefore recommended that the glass be cleaned two
or three times with a non-ammonia household cleaner
and warm water (we recommend gas fireplace glass
cleaner). After that the glass should be cleaned two or
three times during each heating season depending on
the circumstances present.
Clean glass after first two weeks of opera-
tion.
Glass Frame Removal
1. Remove two (2) screws at the bottom of the frame.
(Fig. 17)
2. Lift up and unhook glass frame at the top.
Log Installation and Burner Lava Rock
1 . Remove glass frame. (See "Glass Removal" section)
2. Remove logs from packaging.
3. Place logs according to the model instructions be-
low:
LHEC20, LHER20 (Figs. 18)
a. Place rear left log (JR7). Use the log's bottom
holes to locate it onto one pin stud of the rear log
bracket on the left and the other end of the log
will sit on top of the lid of the left log support.
b. Place rear right log (JR8). Use the log's bottom
holes to locate it onto the two (2) pin studs of the
rear log bracket on the right.
c. Place the front left log (JR9). Position the log
notch against the second grate from the left, and
the other edge of the log on top of the rear left log
notch. Ensure the log is secure in place.
d. Place the front right log (JR10). Position the log
notch against the third grate from the right, and
the other edge of the log on top of the rear right
log notch. Ensure the log is secure in place.
e. Place the burner lava rock on the front area of the
burner housing. (Fig. 18)
LHEC30, LHER30 (Fig. 19)
a. Place the rear center log (KR24). Use the log's
bottom holes to locate it onto the two (2) pin studs
of the rear log bracket on the center.
b. Place rear left log (KR22). Use the log's bottom
holes to locate it onto the two (2) pin studs of the
rear log bracket on the left.
c. Place rear right log (KR23). Use the log's bottom
holes to locate it onto the two (2) pin studs of the
rear log bracket on the right.
d. Place the front left log (KR25). Position the log
notch against the second grate from the left, and
the other edge of the log on top of the rear left log
notch. Ensure the log is secure in place.
1.
2.
Louvre
Glass Panel
FP444
Fig. 16 Louvre removal.
FP1327
window frame removal
4/3/03 djt
Machine Screw FP1353
Fig. 17 Remove glass frame.

12 10005360
LHE Series Natural Vent Insert
First Firing
Upon completing the gas line connec-
tion, a small amount of air will be in
the lines. When first lighting unit with
pilot light, it will take a few minutes
to purge themselves of this air. Once
the purging is complete, the pilot
and burner will light and operate as
indicated in the instruction manual.
Subsequent lightings of the heater will
not require such purging.
When lit for the first time, the appli-
ance will emit a slight odor for awhile.
This is due to paint and lubricants
used in the manufacturing process.
After each lighting, vapor may con-
dense and fog the glass; this moisture
disappears within a few minutes of
burning.
Flame Adjustment (RN/RP Models)
For fireplaces equipped with HI/LO valves, flame
adjustment is accomplished by rotating the HI/LO
adjustment knob located near the center of the gas
control. (Figs. 20 or 21)
LO
HI
Turn
counterclockwise
to decrease
flame height
Turn clockwise
to increase
flame height
HV102
Honeywell hi/lo knob
4/5/99 djt
Fig. 20 Flame adjustment knob for Honeywell Valve.
Honeywell Valve
It is important to periodically perform
a visual check of the pilot and the
burner flames. Compare them to the
Figure 22 and Figure 23 or 24. If any
of the flames appear abnormal call a
service person.
Flame Characteristics
Large Lava Rock Placement
The large lava rock provided with this fireplace should
be placed on the firebox base on either side of the
burner assembly.
Under no circumstances should these
lava rocks be placed on top of the burner
assembly.
e. Place the front right log (KR26). Position the log
notch against the third grate from the right, and
the other edge of the log on top of the rear right
log notch. Ensure the log is secure in place.
f. Place the burner lava rock on the front area of the
burner housing. (Fig. 19)
LG286
LHEDV30
Logs
4/03
KR22
KR25
KR24
KR23
KR26
Burner Lava
Rock
Fig. 19 LHEC30 and LHER30 log and lava rock placement.
Front Grate
LG286
LG285
LHEDV20
logs
4/03
JR9
JR7 JR8
JR10
LG285
Burner Lava Rock
Fig. 18 LHEC20 and LHER20 log and lava rock placement.
Front Grate

13
10005360
LHE Series Natural Vent Insert
F584-703
Honeywell
& PSE
pilot flames
3/8" - 1/2"
SIT Pilot
PSE Pilot
F584-703
Fig. 22 Correct pilot flame appearance.
L
O
H
I
Turn 
counterclockwise
to increase 
flame height.
Turn clockwise
to lower
flame height.
FP390
FLAME ADJUSTMENT KNOB
11/21/96
SIT Valve
Fig. 21 Flame adjustment knob for SIT Valve.
LG287
LHEDV20
log flames
4/03
LG287
Fig. 23 Correct burner flame appearance for LHEC20 and LHER20.
LG288
LHEDV30
Log flames
4/03
LG288
Fig. 24 Correct burner flame appearance for LHEC30 and LHER30.

14 10005360
LHE Series Natural Vent Insert
3. Open control access panel.
4. Push in gas control knob slightly and turn clock-
wise to "OFF". Do not force.
5. Close control access panel.
1. STOP! Read the safety information above.
2. Turn off all electrical power to the fireplace.
3. For MN/MP/TN/TP appliances ONLY, go on to
Step 4. For RN/RP appliances turn the On/Off
switch to “OFF” position or set thermostat to
lowest level.
4. Open control access panel.
5. Push in gas control knob slightly and turn
clockwise to "OFF".
10. Push the control knob all the way in and hold.
Immediately light the pilot by repeatedly depress-
ing the piezo spark ignitor until a flame appears.
Continue to hold the control knob in for about one
(1) minute after the pilot is lit. Release knob and it
will pop back up. Pilot should remain lit. If it goes
out, repeat steps 5 through 8.
FOR YOUR SAFETY READ BEFORE LIGHTING
instructions.
• If you cannot reach your gas supplier, call
the Fire Department
C. Use only your hand to push in or turn the gas
control knob. Never use tools. If the knob will not
push in or turn by hand, do not try to repair it, call a
qualified service technician. Applying force or any
attempted repair may result in a fire or explosion.
D. Do not use this fireplace if any part has been under
water. Immediately call a qualified service techni-
cian to inspect the heater and to replace any part of
the control system and any gas control which has
been under water.
A. This heater has a pilot which must be lit manu-
ally. When lighting the pilot follow these instruc-
tions exactly.
B. BEFORE LIGHTING smell all around the heater
area for gas. Be sure to smell next to the floor
because some gas is heavier than air and will
settle on the floor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any fireplace
• Do not touch any electric switch
• Do not use any phone in your building
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
To Turn Off Gas To Heater
Lighting and Operating Instructions
1. Turn the On/Off switch to "OFF" position or set
the thermostat to lowest setting.
2. Turn off all electric power to the fireplace if
service is to be performed.
Lighting Instructions
6. Wait five (5) minutes to clear out any gas. Then
smell for gas, including near the floor. If you
smell gas, STOP! Follow "B" in the safety infor-
mation above. If you do not smell gas, go to the
next step.
7. Remove glass door before lighting pilot. (See
Glass Frame Removal section).
8. Visibly locate pilot by the main burner.
9. Turn knob on gas control counterclockwise
to "PILOT".
• If knob does not pop up when released, stop
and immediately call your service technician or
gas supplier.
• If after several tries, the pilot will not stay lit,
turn the gas control knob to " " and call your serv-
ice technician or gas supplier.
11. Replace glass door.
12. Turn gas control knob to “ON” position.
13. For RN/RP appliances turn the On/Off switch to
“ON” position or set thermostat to desired setting.
14. Turn on all electrical power to the fireplace.
WARNING:If you do not follow these instructions exactly, a fire or explosion
may result causing property damage, personal injury or loss of life.
Euro SIT SIT NOVA Honeywell
PILOT
ON
OFF
ON
P
I
L
O
T
O
F
F
O
F
F
FP1067
lighting instruction
knobs
3/9/01 djt
5
4
3
2
1
O
F
F
P
i
l
o
t
3/8" - 1/2"
FP1068
Lighting instructions
Pilots

15
10005360
LHE Series Natural Vent Insert
WARNING: Before doing any gas control service work, remove glass front.
SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION
1. Spark ignitor will not light A. Defective or misaligned Using a match, light pilot. If pilot lights, turn off
electrode at pilot. pilot and push the red button again. If pilot will not
light - check gap at electrode and pilot-should be
1/8" to have a strong spark.
B. Defective ignitor (Push Button) Push Piezo Ignitor Button. Check for spark at
electrode and pilot. If no spark to pilot, and elec
trode wire is properly connected, replace ignitor.
2. Pilot will not stay lit after A. Defective pilot generator Check pilot flame. Must impinge on thermo
carefully following lighting (thermocouple), remote wall couple/thermopile. Note: this pilot burner assem
instructions. switch. bly utilizes both-a thermocouple and a thermopile.
The thermocouple operates the main valve
operation (On and Off). Clean and or adjust pilot for
maximum flame impingement on thermopile and
thermocouple.
B. Defective automatic valve Turn valve knob to “Pilot”. Maintain flow to pilot;
milivolt meter should read greater than 10 mV. If
the reading is okay and the pilot does not stay on,
replace the gas valve. Note: An interrupter block
(not supplied) must be used to conduct this test.
3. Pilot burning, no gas to A. Wall switch or wires defective Check wall switch and wires for proper connec
main burner tions. Jumper wire accross terminals at wall
switch, if burner comes on, replace defective wall
switch. If okay, jumper wires across wall switch
wires at valve, if burner comes on, wires are faulty
or connections are bad.
B. Thermopile may not be 1. Be sure wire connections from thermopile at
generating sufficient gas valve terminals are tight and thermopile is
millivoltage. fully inserted into pilot bracket.
2. One of the wall switch wires may be grounded.
Remove wall switch wires from valve terminals if
pilot now stays lit, trace wall switch wiring for
ground. May be grounded to fireplace or gas
supply.
3. Check thermopile with millivolt meter. Take
reading at thermopile terminals of gas valve.
Should read 250-300 millivolts (minimum 150)
while holding valve knob depressed in pilot
position and wall switch “Off”. Replace faulty
thermopile if reading is below specified minimum.
C. Plugged burner orifice. Check burner orifices for debris and remove.
D. Defective automatic valve Turn valve knob to “On”, place wall switch to “On”
operator. millivolt meter should read greater than 100 mV. If
the reading is okay and the burner does not come
on, replace the gas valve.
4. Frequent pilot outage A. Pilot flame may be too low Clean and/or adjust pilot flame for maximum flame
problem. or blowing (high) causing the impingement on thermopile and thermocouple.
pilot safety to drop out.
B. Possible blockage of the vent Check the vent terminal for blockage (recycling the
terminal. flue gases)
Troubleshooting the Gas Control System
NOTE: Before trouble shooting the gas control system, be sure external gas shut off is in the “On” position.
SIT NOVA 820 Millivolt Valve

16 10005360
LHE Series Natural Vent Insert
Gas Supply On
Supply Line Hooked Up
Shutoff Valve Open
NO
NO
NO
NO
Lockout Has Engaged. Wait
60 Seconds And Try Again.
For Spark At Electrode While
Depressing Piezo — 1/8" Gap To
Pilot Hood Needed.
All Wiring Connections
Replace Piezo Ignitor
For Air In The Lines
Thermopile Needs A Minimum
325mv. Adjust Pilot Flame Height.
All Wiring Connections.
Replace Thermopile
Thermocouple Needs A Minimum
of 14mv.
Defective Valve. Turn To Pilot,
Meter Should Read Greater Than
100 Mv. If Not, Replace.
Pilot Lights With
Piezo Ignitor
YES
YES
YES
YES
Pilot Stays Lit
Pilot Lights Main
Burner
System OK.
START
CHECK
Valve Is Turned On
On/off Switch Is Not Turned On.
Watch For Grounded Wires!
Thermopile Needs A Minimum
325mv.
Plugged Burner Orifice.
FP396
NVC-standing pilot troubleshooting
11/22/96
Troubleshooting the Gas Control System
Honeywell Millivolt Valve

17
10005360
LHE Series Natural Vent Insert
Instructions for RF Comfort Control Valve
The Comfort Control Valve allows remote control of
temperature, fan and flame appearance.
NOTE: The antenna should hang in free air away from
grounded metal.
Operation
1. If the manual switch is in remote position, switch it to
LOCAL. (Fig. 25)
2. Turn the pilotstat knob counterclockwise from OFF
to the PILOT position, push the knob down, and hold
in position. The pilot valve opens and allows gas to
flow to the pilot burner.
3. Push plunger on the piezo until the pilot burner is lit.
When the pilot burner is lit, the LED on the control
will come on after approximately 40 seconds and will
be continuously red. When the light turns off which
will be approximately 10 seconds after it has been
continuously red, the receiver/valve is fully powered.
4. Release the knob. The shaft will move upward. The
pilot burner should now stay burning. If the pilot
burner goes out, repeat step 2.
5. Turn the knob counterclockwise to the ON position. If
the manual switch is in the LOCAL position, the main
burner will turn on immediately.
6. ON the initial use of a transmitter, a recognition
operation is required between the receiver/valve
and transmitter. Change the switch from LOCAL
to REMOTE. Press the fan or flame button on the
transmitter within 30 seconds. The LED will blink
indicating the transmitter will now work with the re-
ceiver/valve. If the switch continues in the REMOTE
position, the transmitter will now control the main
valve, flame modulation level and fan control.
7. If the manual switch is in the LOCAL position, the
valve will be at the highest fixed pressure setting.
The transmitter will control the fan only.
Shut Off Procedure
If the manual switch is in the REMOTE position, the
transmitter can shut off the main burner and fan. How-
ever, the control is still on and a command from the
transmitter can turn on the main burner or fan.
To shut off the system, turn the pilotstat knob clockwise
to the OFF position. This action closes the main gas
and safety valves. The transmitter cannot turn on the
main burner or fan.
Transmitter Operation
Off Mode
In the OFF mode, the fireplace flame and fan are
off, the display will show OFF and displays the room
temperature. If the receiver is in REMOTE mode, the
fireplace will shut off.
On (Manual) Mode
In the ON mode, the room temperature, flame and fan
levels will be shown. MANUAL will appear next to both
the flame and fan icons.
When the control is in the ON mode, the flame and fan
levels, and delay timer are changed with the up and
down buttons. To change the flame level, press the
flame button followed by an arrow key. To change the
fan level, press the fan key followed by an arrow key.
Pushing the arrow key once will change the level by
one unit.
FP1037
Honeywell 
comfort valve
3/22/00 djt
LOCAL
REMOTE
ON
•
PILOT
OFF
•
LED
Piezo Ignitor
Local/Remote
Switch Pilotstat Knob
LED
Antenna
Fig. 25 Comfort conrol valve.
FP1037
FP1039
comfort valve
transmitter
3/27/00 djt
Display
Room Temperature
Set Temperature
Flame Height Level
Fan Speed Level
Countdown Timer
Low Battery
Flame
Up
Increases Flame
Height, Fan Speed
Timer, or Set Point
Down
Decrease
Flame, Fan
Speed Timer
or Set Point
Mode
Auto
On
Off
Countdown
Timer
Fan
Fig. 26 Transmitter diagram.
FP1039

18 10005360
LHE Series Natural Vent Insert
Delay Timer Mode
The shut off delay timer has a maximum of 2 hours and
a minimum of zero minutes. To change the timer level,
press the time key followed by an arrow key. Pushing
the key once will change the timer by 10 minutes.
Auto Mode
In the AUTO mode, the room temperature, set tem-
perature, flame and fan levels will be shown. AUTO will
appear next to both the flame and fan icons.
When the control is in the AUTO mode, the main burner
will turn on/off or modulate based on the heat needed
to maintain the set temperature. The flame level will
change automatically to optimize the heat output
needed to maintain the set temperature. To change the
set temperature, press the up or down key. Pushing a
key once will change the temperature by one degree.
In the AUTO mode, the fan speed will increase with
increasing flame height or decrease with decreasing
flame height. “AUTO” is displayed next to the flame and
fan icons.
Fan Override During Auto Mode
If a lower or higher fan speed is desired when operating
in the AUTO mode, the fan speed can be overridden by
pushing the fan button followed by the up or down key.
Pushing a key once will change the fan level by one
unit. In this mode “AUTO” is displayed next to the flame
icon and “MANUAL” is displayed next to the fan icon.
Change Between F/C Temperature Units
Push the up and down arrow keys simultaneously for
at least 3 seconds to toggle between Fahrenheit and
Celsius units.
Disable Thermostat Function
To disable the thermostat function in the AUTO mode,
push the time and down keys simultaneously for at least
3 seconds.
To Change Batteries
1. Remove cover on the backside of the transmitter.
Install 3 AAA batteries as shown and reattach cover.
2. Once steps 1-3 in OPERATION are completed,
receiver/valve and transmitter are now ready. Press
any button on transmitter for recognition process to
occur between the receiver/valve and transmitter.
3. Use functions as described in TRANSMITTER sec-
tion.
FAN
Antenna

Red
White
Red
White
FP1038
comfort valve
wiring diagram
3/24/00 djt
Pilot As-
sembly
Fan
Valve
(Bottom View)
White Dots
FP1038
Fig. 27 Comfort Valve wiring diagram.
Troubleshooting
1. Locate LED light on valve.
2. LED will blink after every valid command received by
the transmitter; this is not an error.
3. Failure codes may occur anytime after pilot burner is
lit.
4. Sequence is failure code followed by light not blink-
ing for 30 seconds.
5. In the event of multiple failure codes, next failure
code follows previous failure code by approximately
3 seconds.
If an Error Code 3 is observed while performing the
testing, complete the following:
1. Make sure the spade connectors are pushed all the
way on. If the Error Code 3 is still showing, then go
to the next step.
2. Switch the front two thermopile leads with the back
two. Be sure the white lead is connected to the
spade with the white dot next to it. If the Error Code
3 is still showing, replace the thermopiles.
If an Error Code 8 is observed while performing the
testing, complete the following:
1. Confirm the valve is not in REMOTE mode.
• If the valve is producing Error Code 8 and in RE-
MOTE mode, the valve is defective and should be
replaced.
• If the valve is in LOCAL mode and producing Er-
ror Code 8, then go to the next step.

19
10005360
LHE Series Natural Vent Insert
LED Count Service Action
8 Replace valve
7 Confirm stepper motor connection
exists
5 Confirm fan connection exists and
works
4 Confirm gas type; jumper in place
3 Replace thermopiles
2 Turn fan ON
NOTE: Some keys are not active.
2. Slide the Remote/Local switch to REMOTE and
teach the valve a transmitter (refer to Item 6, page
1). The Error Code will clear itself after approximate-
ly 1¹⁄₂ minutes and return to normal operation.
If the setting is above
room temperature on
the transmitter, does the
main valve and fan turn
on?
If the setting is below
room temperature on
the transmitter, does
the main valve and fan
turn off?
Turn pilotstat knob
to OFF to turn valve
completely off
Auto Path
Yes
Yes
No
If the manual switch is
set to REMOTE, press
the mode button to
display AUTO on the
transmitter. Does the
transmitter display the
room and temperature
setting?
Move switch
from LOCAL to
REMOTE. Press
any key within 30
seconds.
No

20 10005360
LHE Series Natural Vent Insert
Light pilot burner
Set manual switch
to local or remote
Release pilotstat
knob
Turn pilotstat knob
from PILOT to ON
If manual switch is
set to LOCAL, did
main burner light?
Transmitter con-
trols fan
Turn pilotstat knob
to PILOT to turn
off main burner
Turn pilotstat knob
to OFF to turn
valve completely
off
Comfort Valve system control sequence of operation with transmitter
Did the LED stop
blinking?
Review LED fail-
ure analysis
Five minute wait
period
Cycle switch
once and leave in
remote. Press any
key on transmit-
ter for recognition
operation
Local Path
Move switch from
local to remote.
Press any key on
transmitter. Move
switch back to
local
Yes
Yes
If the manual switch
is set to REMOTE,
press the mode but-
ton to display "ON".
Does transmitter con-
trol the main burner
and fan?
Does transmitter
change levels of
flame height, fan
speed and set
temperature?
Set levels of flame
height and fan to
“0” to shut off main
burner and fan
Turn pilotstat knob
to OFF to turn
valve completely
off
On Path
Move switch from
manual to remote.
Press any key on
transmitter.
Yes
Yes
No
No
Choose Local or
Remote path. Set
switch to manual or
remote
Yes
No