Majestic 18VLNM, 24VLNM, 30VLNM, 18VLNV, 24VLNV Installation And Operating Instructions Manual

Unvented Gas Log

Heater

Installation and Operating

Instructions

MODELS: 18VL, 24VL and 30VL

Natural Gas or Propane/LPG

Control Type: Millivolt

The design of this appliance complies with Standard Z21.11.2 of the American National Standards Institute
and is so certified by the International Approval Service.

In accordance with Standard Z21.11.2, this appliance may be operated as an unvented heater when installed
in a solid-fuel burning fireplace with the flue damper closed or an ANSI approved ventless firebox enclosure.
Follow the applicable instructions contained in this manual. (State or Local Codes may only allow operation of
this appliance in a vented configuration. Check your state or local codes.)

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. This appliance is
not convertible for use with other
gases.

This is an unvented gas-fired
heater. It uses air (oxygen)
from the room in which it is
installed. Provisions for adequate
combustion and ventilation air
must be provided.
Refer to page 7.

WARNINGS

If the information in this manual is not followed exactly,
a fire or explosion may result causing property damage,
personal injury or loss of life.

– Do not store or use gasoline or other flammable

vapors 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 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.

• If you cannot reach your gas supplier, call the fire
department.

– Installation and service must be performed by

a qualified installer, service agency or the gas
supplier.

READ AND SAVE THESE INSTRUCTIONS

53D0501 7/09 Rev. 7

18/24/30VL Unvented Gas Logs

CONTENTS

Important Safety Information ..................................3

Product Features and Specifications .................... 5

Natural Gas .........................................................5

Propane/LPG .......................................................5

Fireplace and Hearth Dimensions ..........................6

Clearances ................................................................7

How This Appliance Operates .................................8

Gas Piping and Gas Pressure Requirements ........ 9

Combustion and Ventilation Air Requirements ...10

Electrical Wiring (Milli-volt) ...................................12

Connecting Optional Wall Switch or

Thermostat .........................................................12

Connecting Remote Receiver ............................ 13

Installation and Adjustment ..................................14

Log Placement ........................................................ 17

Splendor Glow Fiber Log Placement ................. 17

Refractory Log Placement .................................18

Lighting Instructions ..............................................19

For Your Safety Read Before Lighting ...............20

Match Lighting Instructions ................................ 20

Manual Control Lighting Instructions .................21

Milli-Volt Control Lighting Instructions ................22

Thermostat Control Lighting Instructions ........... 23

Safety Checklist ......................................................24

Maintenance ............................................................25

Troubleshooting ..................................................... 27

Replacement Parts ................................................. 28

Warranty .................................................................. 31

Important Information

This owner's manual is to be left with the gas log appliance. It contains information to be used before,
during and after the installation of the gas log appliance. The installer of the gas log appliance
should carefully study this manual before installing the appliance. All people who will be operating
the appliance should also carefully study this manual.

The installation of this appliance must conform with local codes or, in the absence of local codes,
with the National Fuel Gas Code ANSI Z223.1/NFPA 54. The installation and any service of the
appliance must be by a qualified service person. After installing the appliance, the installer should
describe the operation of the appliance to the people who will be operating it.

The appliance is equipped with a pilot safety system that turns off the appliance if enough fresh
air is not available. The operation of and the cleaning of the pilot light safety system are explained
in other sections of this manual. Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect the appliance and to replace any part of
the control system and any gas control, which has been under water.

18VL, 24VL, 30VL

Certified To

ANSI Z21.11.2a-2008

Unvented Heaters &

Z21.60b - 2004;

CSA 2.26b - 2004

2 53D0501

IMPORTANT SAFETY INFORMATION

18/24/30VL Unvented Gas Logs

INSTALLER

Please leave these instructions with the appliance.

IMPORTANT

Read these instructions carefully before installing or trying to operate this vent-free gas heater.

This appliance, as any gas-fired appliance, can produce poisonous carbon monoxide along with other
combustion products. Carbon monoxide, in strong concentrations, can cause sickness, serious personal
injury and death.

Early signs of carbon monoxide poisoning may resemble the flue with head-aches, dizziness and/or
nausea. If you have these signs, the appliance may not be working properly. Get fresh air at once!
Immediately have appliance serviced by a qualified technician.

DANGER

Some people (pregnant women, persons with heart or lung disease, anemia, those under the influence
of alcohol, those at high altitudes) are more affected by carbon monoxide than others.

Operation of this appliance on gases for which
it is not equipped may lead to carbon monoxide
poisoning.

DANGER

Any change to this appliance or its controls can
be dangerous.

WARNING

NOTE: An unvented room appliance is an unvented,

self-contained, gas burning appliance for connection to
the house fuel supply system and for furnishing heat to
the space in which installed directly from the appliance
without duct connection.

IMPORTANT: When installed as an unvented room
heater, this appliance is to be used as a supplemental
heat source only. Do not use this appliance as a primary
heat source.

This appliance shall not be installed in a confined space
or unusually tight construction unless provisions are
provided for adequate combustion and ventilation air.

When properly installed, used and maintained, this
appliance should not produce carbon monoxide in
dangerous quantities. However, since carbon monoxide
can be deadly poisonous, the installer and all users of
this appliance should read and follow these instructions
carefully.

The type of gas for which this appliance is equipped is
marked on the rating label attached to the appliance.
"NAT" is natural gas; "LP" is propane or propane butane
mixture gas.

OWNER

Please retain these instructions for future reference

This appliance cannot be converted to a gas
other than the type for which it is equipped at
the factory.

.

WARNING

Do not install this appliance in any area where
gasoline or any combustible or explosive
material will be used or stored. The flame in
this appliance is not isolated from the air space
it heats and it will ignite flammable vapors, dust
particles or other combustible materials that

DANGER

come in contact with it which can result in an
explosion or fire.

Gaseou s fue l s are hig hly explos ive in ce r tai n
concentrations and are very flammable. Any gas leaks
in the plumbing supplying gas to this appliance can lead
to fire or explosion.

Sufficient space must be provided around this appliance
to provide air for combustion and ventilation and to allow
room for servicing. To provide the required spacing;
do not install this appliance in any solid-fuel burning
fireplace with any dimension smaller than shown by
Table 1.

This appliance is for installation only in a solid-fuel
burning masonry fireplace or a UL 127 factory-built
fireplace or a listed ventless firebox enclosure as
specified within this manual. This appliance has been
design certified for these installations. Exception: DO
NOT install this appliance in a factory-built fireplace that
includes instructions stating the factory-built fireplace
has not been tested with, or should not be used with,
unvented gas log appliances.

53D0501 3

18/24/30VL Unvented Gas Logs

18VL, 24VL and 30VL gas log appliances are design
certified as unvented room appliances for installation in
an ANSI approved ventless firebox enclosure.

Notice: If installed in a VF32-R, VF36-R, VF42-R, EVB36,
VF36, VF42, or VF3D ventless fireplace enclosure, this
gas log appliance can only be operated as an unvented
heater. Unvented heaters are not permitted by some
state or local codes. Before installing a ventless firebox
enclosure for this gas log appliance, check your state
or local codes to determine if unvented heaters are
permitted in your area. If unvented heaters are permitted
in your area, follow the instructions accompanying the
ventless firebox enclosure.

Do no t ins tal l thi s applia n ce in a bedroo m or
bathroom.

Do not install this appliance in a fireplace whose flue is
serving a separate solid-fuel burning appliance.

If this appliance is installed in a fireplace equipped
with outside air facilities and the entrance point of the
outside air is located in a plane above the bottom of
the fireplace, the outside air facility must be sealed at
the point it enters the fireplace. Failure to do this may
create a fire hazard.

Due to high temperatures, this appliance must be located
out of traffic and away from furniture and drapery.

Installation and repair should be done by a qualified
service person.

IMPORTANT SAFETY INFORMATION

Never connect unit to private (non­utility) gas wells. This gas is commonly
known as wellhead gas.

WARNING

4 53D0501

PRODUCT FEATURES and SPECIFICATIONS

18/24/30VL Unvented Gas Logs

NATURAL GAS

NOTE: An external regulator is required to reduce supply pressure to a maximum of 10 1/2" W.C. on
natural gas systems operating at higher pressure.

Manual Pressure Milli-Volt and T-stat Pressure

Regulator Pressure Setting: 3.0" w.c. Regulator Pressure Setting: 3.5" w.c.
Pilot Regulator: 3.5" w.c.

Gas Inlet Pressure: Max 101/2" w.c. Gas Inlet Pressure: Max. 101/2" w.c.
Min. 5" w.c. Min. 5" w.c.

Gas Rate

Model Number Control Max BTU/hr Min. BTU/hr

18VLNM Manual 28,000 18,000
24VLNM Manual 34,000 20,000
30VLNM Manual 34,000 20,000
18VLNV Milli-volt 28,000 18,000
24VLNV Milli-volt 34,000 25,000
30VLNV Milli-volt 34,000 25,000
18VLNT Thermostat 28,000 18,000
24VLNT Thermostat 38,000 25,000
30VLNT Thermostat 38,000 25,000

PROPANE/LPG

Note: An external regulator is required to reduce supply pressure to a maximum of 13" w.c.

Manual Pressure Milli-Volt and T-stat Pressure

Regulator Pressure Setting: 10.0" w.c. Regulator Pressure Setting: 10" w.c.

Gas Inlet Pressure: Max 13" w.c. Gas Inlet Pressure: Max. 13" w.c.
Min. 11" w.c. Min. 11" w.c.

Gas Rate

Model Number Control Max BTU/hr Min. BTU/hr

18VLPM Manual 28,000 18,000
24VLPM Manual 34,000 20,000
30VLPM Manual 34,000 20,000
18VLPV Milli-volt 28,000 20,000
24VLPV Milli-volt 34,000 30,000
30VLPV Milli-volt 34,000 30,000
18VLPT Thermostat 28,000 18,000
24VLPT Thermostat 34,000 20,000
30VLPT Thermostat 34,000 20,000

53D0501 5

18/24/30VL Unvented Gas Logs

A

B

C

D

This appliance is for installation only in a solid-fuel burning masonry or UL127 factory­built fireplace, vent free appliance, or in listed ventless firebox enclosure. It has been
design certified for these installations.

Exception: DO NOT install this appliance in a factory-built fireplace that includes
instructions stating it has not been tested or should not be used with unvented gas

WARNING

logs.

FIREPLACE and HEARTH DIMENSIONS

Minimum Fireplace Dimensions

Model A B C D
VL18 19" 131/4" 25" 17"
VL24 221/2" 131/4" 27" 17"
VL30 251/2" 131/4" 321/2" 17"

LG567

6 53D0501

CLEARANCES

12”

12”

8”

21/2”

10”

16”

18”

18/24/30VL Unvented Gas Logs

The minimum clearance to any combustible item in front of this appliance should be no less
than 36 inches from the face of the fireplace in which this appliance is installed.

Any combustible mantel present on the fireplace facing of any fireplace in which this
appliance is installed must not extend more than 12 inches from the face of the fireplace.
Also, the combustible mantel must be at least 28 inches above the fireplace opening as
shown in Figure 2 unless a CABL/CABR fireplace canopy is installed as described.

If a combustible mantel is less than 28 inches above the fireplace opening of any fireplace
in which this appliance is installed, obtain a CABL/CABR fireplace canopy from your
appliance dealer and install it on the fireplace according to the instructions furnished with
the CABL/CABR fireplace canopy. For any fireplace in which this appliance and canopy
are both installed, the mantel extensions and corresponding mantel clearances are as
shown in Figure 2. The mantel must lie in or above the dashed line shown in Figure 2. (The
mantel extension is the distance the mantel extends from the fireplace facing. The mantel
clearance is the distance from the fireplace opening to the bottom of the mantel.)

Any other combustible or noncombustible extension or trim extending from the fireplace
facing of any fireplace in which this appliance is installed must comply with (1) local codes
or, in the absence of local codes, with the latest edition of ANSI/NFPA 211 if the fireplace
is an at-site masonry solid-fuel burning fireplace, or (2) the instructions provided by the
fireplace manufacturer if the fireplace is a prefabricated factory-built solid-fuel burning
fireplace or is a listed ventless firebox enclosure.

CLEARANCE TO COMBUSTIBLES

Front: No less than 36 inches from the face of the fireplace in which the appliance is

installed.

Mantel: Must not extend more than 12 inches from the face of the fireplace and must be
at least 28 inches above the fireplace opening (unless a CABL/CABR fireplace canopy is
installed.) Figure 2

Minimum Mantel Clearance

Mantel Extension

Mantel

Clearance

28"

Mantel
Extensions

Minimum Mantel Clearances with
CABL/CABR Canopy

Canopy

Mantel
Clearances

Figure 2
Mantel Clearances

53D0501 7

LG568

18/24/30VL Unvented Gas Logs

HOW THIS APPLIANCE OPERATES

This appliance is equipped with a pilot burner, two main
burners, and an ignition tube, which connects the two
main burners. The flame from the pilot burner ignites the
top main burner. The flame from the top main burner then
ignites the gas in the ignition tube which in turn ignites
the bottom main burner. The pilot burner, top main burner
and bottom main burner then burn in unison.

The control system on this appliance serves several
functions. It regulates the incoming gas to the correct
pressure for the rate required. It will not regulate LP gas

Never use this appliance to dry clothes, cook on
or for any purpose other than providing heat into
the area around the appliance.

This control system is a safety system and
must not be tampered with. Do not attempt to
make any adjustments to the control or pilot

WARNING

other than those described in the installation
and adjustment or troubleshooting sections of
this manual.

directly from the container. A separate regulator must
be installed on the tank or bottle to reduce the gas pressure supplied to the appliance to between
11 and 13 inches water column. The control system also provides a safety shutoff to allow gas to
flow to the main burners only when the pilot is burning and to shut off gas to the pilot burner and
main burners should the pilot flame not be burning. It provides a manual safety valve to turn gas
on and off to the main burners. There is a safety feature in the control valve which will lock the
control valve in the OFF position for a few minutes until the pilot valve closes should the knob be
turned OFF while the pilot is burning. This prevents escape of unburned gases. The control system
also regulates the pilot gas flow to that required for proper operation and provided for shutoff of
the gas to the pilot burner and main burners should the oxygen in the area of the appliance be
depleted to near dangerous levels.

This control system is a safety system and must not be tampered with. Do not attempt to make
any adjustments to the control or pilot except those listed in the installation and adjustment or
troubleshooting sections.

Air is pulled into the main burners by the gas stream and mixed with the gas inside the main
burners before burning. Additional air enters the appliance through openings in the back, bottom,
front and sides of the appliance to complete the burning of the gas. See the combustion and
ventilation air requirements section of this manual for source of the air. Blocking or altering airflow
into and away from the appliance could cause improper combustion and the production of carbon
monoxide gas that could accumulate to hazardous concentrations. To prevent a disruption of the
airflow through the appliance, keep the appliance clean as described by the maintenance section
of this manual.

This appliance's heat input is best utilized when the appliance is installed in a solid-fuel burning
fireplace with the flue damper closed, or when installed in a listed ventless firebox enclosure. The
amount of heat input utilizable when the appliance is installed in a solid-fuel burning fireplace with
the flue damper open is dependent upon how much of the heat input escapes through the open
flue damper.

8 53D0501

GAS PIPING and GAS PRESSURE REQUIREMENTS

18/24/30VL Unvented Gas Logs

All gas piping must be installed to comply with local codes or, in the absence of local codes, with
the National Fuel Gas Code ANSI Z223.1/NFPA 54. Only flexible hoses listed by a certified agency
may be used.

The appliance and its individual shutoff valve

Operation of this appliance on LP gas without
an approved regulator at the supply container
will lead to gas leaks with possible fire or
explosion.

DANGER

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 kPa).
The appliance must be isolated from the gas
supply piping system by closing its individual
manual shutoff valve during any pressure testing

Do not use candles, matches or other ignition
sources when checking for leaks. Fuel gases are
very flammable and, in certain concentrations,
explosive. Checking for leaks with an open flame

DANGER

may lead to fire or explosion.

of the gas supply piping system at test pressures

CAUTION

equal to or less than 1/2 PSIG (3 kPa). Pressures
in excess of 1/2 PSIG (3 kPa) will cause damage
to the control valve and may cause damage to
the shutoff valve.

All gas piping must be installed to comply with local codes or, in the absence of local codes, with the
National Fuel Gas Code ANSI Z223.1/NFPA 54. Do not use flexible hose unless the hose is listed by
a recognized testing agency for use with gas and is approved by the local code authority.

Unions in gas lines shall be of the ground joint type. Compounds used on threaded joints of gas piping
must be resistant to the action of liquefied petroleum gas.

For purpose of input adjustment, the gas piping must be of sufficient size to provide a minimum natural
gas pressure at the appliance of 5 inches water column or 11 inches for LP gases. The maximum
inlet gas pressure to the appliance must not exceed 10 inches for natural gas and 13 inches for LP
gases. If this appliance is to be supplied with LP gas (bottled propane) the tank or bottle supplying
the gas must have a regulator that reduces the gas pressure to between 11 and 13 inches water
column. The control will not operate with gas line pressure directly from the tank and may leak gas
due to this excessive pressure.

Include a manual shutoff valve and union in the line so the appliance may be disconnected for
servicing. Include a drip leg and a plugged 1/8 inch NPT tapping in the line also. The tapping must
be accessible for test gauge connection immediately upstream
of the gas supply connection to the appliance.

Use a soap-water solution or a liquid gas leak detector to
coat each joint in the piping system and look for bubbles
which indicate gas leaks. Repair all gas leaks.

A standard control assembly and typical gas-piping
diagram are shown by Figure 3.

Control Valve

Main Regulator

Union

Gas Supply
Line

Shut off Valve

LG569

53D0501 9

Figure 3
Gas Connection

NOTES:

1. Provide a 1/8" NPT plugged tapping for pressure

2. For clarity, some appliance plumbing not shown.

Tee

gauge connection between shutoff valve and main
regulator.

Drip Leg

18/24/30VL Unvented Gas Logs

COMBUSTION and VENTILATION AIR REQUIREMENTS

As do all gas-fired appliances, this appliance requires
fresh air (oxygen) for proper combustion and ventilation.
In some cases, but not all, normal air infiltration into a
building will supply a sufficient amount of fresh air for
proper combustion and ventilation. The number of gas­fired appliances involved, the type of space being utilized,
and the construction tightness of the building involved
must all be considered when determining whether normal
air infiltration is sufficient or if additional fresh air will be
needed for proper combustion and ventilation of the gas­fired appliances installed in a particular space.

Unconfined space and confined space are the terms
used to describe the space in which gas-fired appliances
may be installed. The National Fuel Gas Code, ANSI
Z223.1/NFPA 54 defines a confined space as a space
whose volume is less than 50 cubic feet per 1,000 BTU
per hour (4.8 m3 per kW) of the aggregate input rating of
all gas-fired appliances installed in that space. Rooms
communicating directly with the space in which the
appliances are installed, through openings not furnished
with doors, are considered a part of the "to be defined"
space. For example, three rooms in a house are adjoining
with interconnecting passageways but no doors; each room has an 8-foot ceiling. One room
is 16 x 12 feet, one is 12 x 12 feet and one is 10 x 14 feet. The total volume of the three
rooms is 3,808 cubic feet; (8x16x12) plus (8x12x12) plus (8x10x14) equals 3,808 cubic
feet. To be considered an unconfined space, the total maximum aggregate input rating
of all gas-fired appliances installed in the 3,808 cubic feet space must not exceed 76,160
BTU per hour; (3,808 divided by 50) x 1,000 equals 76,160 BTU per hour.

Normal air infiltration into an unconfined space will be adequate to supply the necessary
fresh air for proper combustion and ventilation if the building is not constructed unusually
tight. However, if the building is of unusually tight construction, additional fresh air from
outside will be required for proper combustion and ventilation of the gas-fired appliances
installed in the unconfined space. Unusually tight construction is defined as constructions
where:

If the area in which this appliance may be
operated is smaller than that defined as an
unconfined space or if the building is of unusually
tight construction, provide adequate combustion
and ventilation air by one of the methods
described in the National Fuel Gas code, ANSI
Z223.1/NFPA 54, Section 5.3 or applicable local

WARNING

codes. This appliance shall not be installed in a
confined space or unusually tight construction
unless provisions are provided for adequate
combustion and ventilation air.

Because water is a product of fuel gas combustion,
all gas-fired appliances will produce some water
vapor (humidity) when fired. The water vapor
may collect on windows and walls, especially in
buildings constructed unusually tight. Providing
additional fresh air will reduce the amount of

CAUTION

water vapor which collects on the windows and
walls.

a) walls and ceilings exposed to the outside atmosphere have a continuous water vapor

retarder with a rating of 1 perm (6 x 1011 kg per pa-sec-m2) or less with openings
gasketed or sealed;

b) weather stripping has been added on openable windows and doors, and

c) caulking or sealants are applied to areas such as joints around window and door frames,

between sole plates and floors, between wall-ceiling joints, between wall panels, at
penetrations for plumbing, electrical, and gas lines, and at other openings.

10 53D0501

COMBUSTION and VENTILATION AIR REQUIREMENTS

18/24/30VL Unvented Gas Logs

This appliance shall not be installed in a confined
space or unusually tight construction unless
provisions are provided for adequate combustion
and ventilation air.

The ODS (Oxygen Depletion Sensor) Pilot light
safety system is not a substitute for proper
installation and use of this appliance. Failure to
observe installation and use guidelines in this

Consult your local building inspector or section 5.3 in
the National Fuel Gas Code ANSI Z223.1/NFPA 54 if

manual can lead to carbon monoxide poisoning,

WARNING

fire or explosion.

you have any questions about fresh air requirements
for proper combustion and ventilation of gas-fired
appliances.

This appliance is equipped with an ODS (oxygen depletion sensor) pilot light safety system that
turns off the appliance if not enough fresh air is available. Never attempt to adjust this safety
system. It will not operate correctly if tampered with. When used without fresh air, appliance may
give off carbon monoxide, an odorless, poisonous gas.

If this appliance shuts off during operation, do not relight it until you provide additional fresh air. If
permanent provisions for providing additional fresh air have not been implemented, the additional
fresh air may be provided by opening a window an inch or two while the appliance is operating. If
the appliance keeps shutting off during operation, have it serviced.

53D0501 11

18/24/30VL Unvented Gas Logs

ELECTRICAL WIRING (MILLI-VOLT)

The milli-volt valve is a self-powered combination gas control THAT DOES NOT REQUIRE 110 VAC TO OPER­ATE.

Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation. Verify
proper operation after servicing.

CAUTION

ODS Pilot

On/Off Switch

ODS Pilot

Wall
Switch

Millivolt

On/Off
Switch

TH = 3
TP = 1

TP/TH = 2

Valve

Spade Terminal

Figure 19 ­Wiring Diagram

CONNECTING OPTIONAL WALL SWITCH OR THERMOSTAT

1. Use 18 awg, two-wire cable, 15 feet maximum length.

2. At one end of the cable, connect both wires to the wall switch or thermostat. At the other end, connect one

wire to TP/TH and one wire to TH, or connect the wall switch/thermostat to the two male (0.25") terminals
on the left side of the unit. The color of the wires does not matter.

12 53D0501

Switch

LG570

Optional Wall
Switch, Remote
Receiver or
Optional T-Stat

ELECTRICAL WIRING (MILLI-VOLT)

18/24/30VL Unvented Gas Logs

CONNECTING REMOTE RECEIVER

THESE INSTRUCTIONS SUPERSEDE THE SECTION ENTITLED "HEARTH
MOUNT" IN THE MILLIVOLT HAND HELD REMOTE INSTRUCTIONS SUPPLIED
WITH THE REMOTE.

1. Plug wire into the back of the remote receiver.

2. Connect the other end of the wire harness to the wire harness attached to the unit
located on the left side. Do not let the wires touch the grate or burner.

3. Stick velcro pads with self-adhesive backing to the side of the remote receiver and
to the left side of the unit. Figure 20

4. Attach remote receiver with velcro pads. Control switch must face forward.

Remote Receiver

LG571

Figure 18 ­Install Remote Receiver

NOTE: Heat reduces battery life. You can protect the receiver and extend battery life
by mounting receiver in wall or other location outside the fireplace.

53D0501 13

18/24/30VL Unvented Gas Logs

INSTALLATION and ADJUSTMENT

Use these instructions as a guide while installing and
adjusting this gas log appliance. The installation must
conform with local codes or, in the absence of local
codes, with the National Fuel Gas Code ANSI Z223.1/
NFPA 54.

The following installation and adjustment steps apply to
unvented heater installations. If this appliance is to be
installed in a solid-fuel burning fireplace, make sure the
fireplace is large enough; refer to Table 1.

1. To comply with the size requirements for the appliance,
refer to Table 1. In accordance with Standards
Z21.11.2, this appliance may be operated as an
unvented heater when installed in a solid-fuel burning
fireplace with the flue damper closed or in an ANSI
approved ventless firebox enclosure.

2. WARNING: If this appliance is to be installed in a
previously-used fireplace, thoroughly clean the interior
of the fireplace (including any smoke shelf, damper
frame and chimney flue) of soot, creosote, ashes,
loose paint or any other substance which could be transported by water vapor or circulated
by air flow into the space served by this appliance. Cleaning of a solid-fuel burning fireplace
must be performed by a qualified chimney cleaner. GCPK Gas Conversion Prep Kit, available
at your local dealer, may be used to return an even finish to refractory panels which have been
discolored due to use.

3. If desired, permanently close any fireplace chimney damper in the fireplace. (As noted earlier,
this appliance's heat input is best utilized when the appliance is installed in a solid-fuel burning
fireplace with the flue damper closed, or when installed in a listed ventless firebox enclosure. The
amount of heat input utilizable when the appliance is installed in a solid-fuel burning fireplace
with the flue damper open is dependent upon how much of the heat input escapes through the
open flue damper.)

4. Permanently close any outside air duct and/or ash dump in the fireplace.

5. Install a gas supply line according to the gas piping and gas pressure requirements section of
this manual.

This appliance is for installation only in a solid­fuel burning masonry fireplace or a UL 127
factory-built fireplace or a listed ventless firebox
enclosure as specified within this manual. This
appliance has been design certified for these
installations. Exception: DO NOT install this

appliance in a factory-built fireplace that

WARNING

includes instructions stating the factory­built fireplace has not been tested with, or
should not be used with, unvented gas log
appliances.

Provisions for combustion and ventilation air for
this appliance must be in accordance with the
Combustion and Ventilation Air Requirements
section of this manual.

WARNING

14 53D0501

INSTALLATION and ADJUSTMENT

18/24/30VL Unvented Gas Logs

6. Set the appliance base assembly in the fireplace and
connect the gas supply line to the main regulator of
the appliance. The base assembly may be secured
to the fireplace by using masonry screws. Figure4

Figure 4
Secure Base Assembly

LG572

Do not use candles, matches or other ignition
sources when checking for gas leaks. Fuel gases
are very flammable and in certain concentrations,
explosive. Checking for leaks with an open flame

DANGER

may lead to fire or explosion.

Masonry Screws

7. Before setting logs in place, turn the gas on and check each joint in the gas line carefully
with a soap and water or liquid gas leak solution for leaks. Bubbles indicate leaks. Repair
any leaks before proceeding.

8. It is most convenient to light the pilot burner and check the operation of the main burners
with the logs not in place. After carefully checking the gas line for leaks and correcting
any found, refer to the lighting and operation section of this manual. Carefully read the
safety information, then light the pilot burner according to the instructions. The pilot flame
should be clear blue and should appear similar to the flame as shown in Figure5.

Pilot Flame
1" - 11/2" for LP Models
23/4" - 31/4" for NG Models

Thermocouple
for NG

Figure 5 ­Pilot Flame

NOTE: Never attempt to adjust the pilot

LG573

Thermocouple for LP

Air Intake

in any way, to do so will cause it not to
operate as it is intended.

53D0501 15

18/24/30VL Unvented Gas Logs

INSTALLATION and ADJUSTMENT

9. After the pilot flame is established, turn the appliance's

control knob counterclockwise to low then press the
control knob inward slightly and continue turning
counterclockwise to high. Wait for the two main
burners to ignite. If the burner's do not light within
four seconds after the control knob has been turned

Incorrect placement of the logs on the base
can cause the production of carbon monoxide
gas and soot. Always keep the logs properly
placed.

WARNING

to high, or if the bottom main burner does not ignite
within four seconds after the top main burner ignites,
turn the control knob clockwise to pilot and read the
troubleshooting section of this manual for help in
determining why ignition did not occur. Always follow
this procedure when igniting the two main burners.

10. With the pilot and main burners in operation, check

each connection in the gas supply system and control

The presence of soot on the logs or any part of
this appliance indicates a problem exists. If soot
is found, turn off the gas to the appliance and
call a qualified service technician.

Refer to the Troubleshooting section of this

WARNING

instruction manual for assistance in determining
cause and solution to the problem.

system for leaks with a soap and water or liquid gas
leak solution. If any leaks are found, turn the gas
supply off and repair leaks before proceeding.

11. The flames of each main burner should appear similar to the flames shown in Figure6. The

flames may have red or orange streaks caused by dust in the air.

Yellow Flame

Top Rear
Burner

* 1/2" to 1" Blue
(Natural Gas)
1" to 11/2" Blue
(LP Gas)

Figure 6 ­Correct Burner Flame Appearance

*

LG574

Front Burner

12" Approx.

6" Approx.

2" Approx.

Flame: Pale Blue

Flame: Bright Blue

16 53D0501

NOTICE: The rear burner should have a minimum of 1/2"
of blue at the base of the burner flame on natural gas fired
appliances, and a minimum of 1" of blue at the base of the
burner flame on propane or LP gas fired appliances. There
should be no yellow flame within this minimum height.

LOG PLACEMENT

18/24/30VL Unvented Gas Logs

SPLENDOR GLOW FIBER LOG PLACEMENT

RefertoFigure12

1. Position the metal log support assembly on the base by aligning the notches of the log
support assembly with the corresponding four log stops and two rear tabs of the base.

2. Set the back log on the log support assembly. Make sure the holes in the back log fit
onto the matching pins projecting from the log support assembly.

3. Set the middle log on the log support assembly as shown in Figure 12. Make sure
the holes in the middle log fit onto the matching pins projecting from the log support
assembly.

4. Set the front log on the log support assembly. Make sure the holes in the front log fit
onto the matching pins projecting from the log support assembly.

5. Set the straight/left top log onto the back log, middle log and front log. Make sure the
holes in the top log fit onto the matching pins projecting from the back and middle log.

6. Set the top onto the back log and middle log. Make sure the holes in the log fit onto the
matching pins projecting from the back and middle log.

Figure 12 ­Splendor Glow Log Placement

53D0501 17

LG575

18/24/30VL Unvented Gas Logs

LOG PLACEMENT

REFRACTORY LOG PLACEMENT

1. Set the back log in position with the locating pins behind the log stops as shown in Figure13.

2. Set the middle log in position with the locating pins behind the log stops. The middle log can
be identified by the burned area in its center. Figure13

3. Set the front log into position with the locating pads on each side of the middle log blocks. Figure

14

4. Set the left and right twigs into their matching recesses. Figure15

Figure 13 ­Place Back and Middle Logs

Figure 14 ­Place Front Log

LG577

LG576

Locator Tabs for Log
Placement

LG578

Figure 15 ­Place Left and Right Twigs

18 53D0501

LIGHTING INSTRUCTIONS

18/24/30VL Unvented Gas Logs

WARNING: Do not allow fans to blow directly into the fireplace. Avoid any drafts that alter
burner flame patterns.

WARNING: Do not use a blower insert, heat exchanger insert or other accessory not
approved for use with this appliance.

CAUTION: This appliance is hot while in operation. Do not touch. Keep children, clothing,
furniture, gasoline and other liquids having flammable vapors away.

Children and adults should be alerted to the hazard of high surface temperature and should
stay away to avoid burns or clothing ignition.

Young children should be carefully supervised when they are in the same room with the
appliance.

Do not place clothing or other flammable material on or near appliance.

Do not burn solid fuel in the fireplace in which this appliance is installed.

When this appliance is in operation, any glass doors on the fireplace in which the appliance
is installed, must be completely open to prevent overheating.

A mesh fireplace screen must be in place when the appliance is operating and unless
other provisions for combustion air are provided; the screen shall have an opening(s) for
introduction of combustion air.

NOTICE: This appliance will go through a curing process during its initial (first 2 to 3 hours)
operating period and will emit some smoke and odor. Oil and paint odors from a newly
installed fireplace or soot, creosote and ash odors from a previously used fireplace may
also be noticeable during this initial operating period. Be prepared for any smoke and odor
by raising windows or opening doors to provide additional ventilation during this initial
operating period. If this appliance is installed in a solid-fuel burning fireplace as a unvented
heater, it is recommended that the fireplace damper be open during the appliance's initial
operating period in order to reduce the possibility of soot, creosote and ashes from a
previously-used fireplace being circulated by air flow or transported by water vapor into
the space served by this appliance.

CAUTION: Candles, incense, oil lamps, etc. produce combustion by products including
soot. Vent-free appliances will not filter or clean soot produced by these types of products.
In addition, the smoke and/or aromatics (scents) may be reburnt in the vent-free appliance
which can produce odors. It is recommended to minimize the use of candles, incense, etc.
while the vent-free appliance is in operation.

53D0501 19

18/24/30VL Unvented Gas Logs

OPERATING INSTRUCTIONS

FOR YOUR SAFETY READ BEFORE LIGHTING

If you do not follow these instruction
exactly, a fire or explosion may result
causing property damage, personal
injury or loss of life.

WARNING

A. This appliance is equipped with a piezo ignition device which lights the pilot. If piezo is not working

properly see Match Lighting Instructions.

B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floor

because some gas is heavier than air and will settle on the floor.

MATCH LIGHTING INSTRUCTIONS

1. Remove any items necessary for easy access to the pilot (for example: logs, screens, etc.).

2. Follow appropriate lighting instructions found previously. Instead of pushing and releasing the
piezo button, light a match and hold the flame to the end of the pilot and ignite the pilot.

3. After control knob has been released and pilot stays lit, reinstall any items that were removed
for pilot access.

4. Call a qualified service technician for repair or replacement of the piezo ignitor.

WHAT TO DO IF YOU SMELL GAS:

• Do not attempt to light any appliance.

• 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 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, don't try to repair it. Call a qualified service technician. Force or attempted repair
may result in a fire or explosion.

D. Do not use this appliance if any part of it has been under water. Immediately call a qualified service

technician to inspect the appliance and to replace any part of the control system and any gas control
that has been under water.

Figure 33 ­Location of Piezo Ignitor, Control Knobs
and Switch on Millivolt, Thermostat and
Manual Units

20 53D0501

Piezo Ignitor

LG579

Switch

Control Knob

OPERATING INSTRUCTIONS

18/24/30VL Unvented Gas Logs

MANUAL CONTROL LIGHTING INSTRUCTIONS

1. STOP! Read the safety information.

2. Make sure the manual shutoff valve is fully open.

3. This heater is equipped with an ignition device (piezo) which automatically lights the pilot.

4. Refer to Page 23, Figure 33 for the location of the piezo ignitor and control knob. Push in gas control
knob slightly and turn control knob clockwise to the OFF position.

NOTE: Knob cannot be turned to OFF unless knob is pushed in slightly. Do not force.

5. Wait (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas,
STOP! Follow the instructions under WhatToDoIfYouSmellGas.If you do not smell gas, go to
the next step.

6. From OFF position, turn the gas control knob counterclockwise to IGN position. Figure34.
Push in control knob for 5 seconds.

NOTE: If you are running the heater for the first time, it will be necessary to press in the control

knob for 30 seconds to allow air to bleed out of the gas piping.

7. With the control knob pushed in, push in and release the piezo ignitor button to light the ODS pilot.
The pilot is located on the left side of the heater, behind the middle log and on the back of the rear
burner. If piezo ignitor does not light the pilot, refer to MatchLightingInstructions.

8. Hold the control knob in for an additional 10 seconds to prevent the ODS pilot from shutting off the
gas while the thermocouple is warming up.

9. Release the control knob:
– If the knob does not pop out when released, stop and immediately call your service technician

or gas supplier.

– If the ODS pilot will not stay lit after several tries, push and turn the gas control knob clockwise

to OFF and wait 15 seconds. Repeat steps 6 through 9.

10.Push in control knob and turn counterclockwise to the HIGH setting. At this location the con­trol knob will pop our when positioned correctly. The knob can now be positioned at any position
between HIGH and LOW. Refer to Figures35and36.

Rotate

Figure 34 ­IGN Position

Rotate

Push

Figure 35 ­HIGH Position

Wait 30 seconds before readjusting the heater
when the control knob has been turned down to
a lower setting.

Push

Rotate

Figure 36 ­LOW Position

WARNING

TO TURN OFF GAS TO HEATER

1. Turn control knob clockwise to OFF position to completely shut off the heater.

2.

If applicable: Turn off all electric power to the heater.

53D0501 21

18/24/30VL Unvented Gas Logs

OPERATING INSTRUCTIONS

MILLI-VOLT CONTROL LIGHTING INSTRUCTIONS

1. STOP! Read the safety information label.

2. Make sure the manual shutoff valve is fully open.

3. This gas log set is equipped with an ignition device (piezo) which automatically lights the pilot. If
piezo ignitor does not light the pilot, refer to MatchLightingInstructions,page29.

4. Turn gas control knob clockwise to the OFF position, set the thermostat to the lowest setting and
turn ON/OFF switch to OFF position.

5. Wait (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas,
STOP! Follow the instructions under WhatToDoIfYouSmellGas,page31.

6. From OFF position, turn the gas control knob counterclockwise to IGN position. Push in
control knob for 5 seconds. NOTE: If you are running the heater for the first time, it may be

necessary to press in the control knob for 30 seconds or longer to allow air to bleed out of
the gas piping.

7. With the control knob pushed in, push in and release the piezo ignitor button to light the pilot.

8. Continue pushing the control knob in for a further 10 seconds to prevent the flame detector from
shutting off the gas while the probe is warming up. Release the control knob.

9. Turn gas control knob counterclockwise to the ON position.

10. After the pilot has been lit for one minute, the burners can be turned on. Turn the ON/OFF switch
to ON position.

11. If the gas logs will not operate, follow the instructions To Turn Off Gas To Heater below and call
your service technician or gas supplier.

ON/OFF
Switch

HI/LO Control

Ignitor Pilot
Control

LG583

LG584

Figure 37 ­Pilot

Piezo

Figure 38 ­Control Cover Plate for Milli-volt

TO TURN OFF GAS TO HEATER

1. Turn control knob clockwise to OFF position to completely shut off the heater.

2. If applicable: Turn ON/OFF switch to OFF position and/or set thermostat (if present) to lowest setting.

3. If applicable: Turn off all electric power to the heater.

22 53D0501

OPERATING INSTRUCTIONS

18/24/30VL Unvented Gas Logs

THERMOSTAT CONTROL LIGHTING INSTRUCTIONS

1. STOP! Read the safety information.

2. Make sure the manual shutoff valve is fully open.

3. This heater is equipped with an ignition device (piezo) which automatically lights the pilot.

4. Refer to Page 23, Figure 33 for the location of the piezo ignitor and control knob. Turn control knob
clockwise to the OFF position.

NOTE: Knob cannot be turned to OFF unless knob is pushed in slightly. Do not force.

5. Wait (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas,
STOP! Follow the instructions under WhatToDoIfYouSmellGas.If you do not smell gas, go to
the next step.

6. Turn the gas control knob counterclockwise to IGN position. Figure39. Push in control knob
for 5 seconds.

7. With the control knob pushed in and held, push and release the piezo ignitor button to light the ODS
pilot. The pilot is located on the left side of the heater, behind the front log and in front of the main
burner. If piezo ignitor does not light the pilot, refer to MatchLightingInstructions.

8. Hold the control knob in for an additional 10 seconds to prevent the ODS pilot from shutting off the
gas while the thermocouple is warming up.

9. Release the control knob:
– If the knob does not pop out when released, stop and immediately call your service technician

or gas supplier.

– If the ODS pilot will not stay lit after several tries, push and turn the gas control knob clockwise

to OFF and wait 15 seconds. Repeat steps 6 through 9.

10.Turn control knob to any position between LOW and HIGH. The knob position controls the ther­mostat temperature. Figure 39

11. The heater is now in proper operation. The following procedure should be used to achieve ther­mostatic control of the desired room temperature:

a. Operate unit at higher setting until desired room tempera-

ture is achieved.

b. At the desired temperature, slowly turn the knob clockwise

and stop rotating when flame disappears.

c. Thermostat is now set to maintain the current room tem-

perature.

d. As the room temperature decreases, the thermostat valve

Rotation

Figure 39 ­Rotation of Control Knob

will open to ignite the front and rear burner.

e. When the temperature reaches its set point (knob posi-

tion), the thermostat valve will again shut off the front and
rear burner.

f. This is the normal cycle of the heater.

Wait 30 seconds before readjusting the heater
when the control knob has been turned down to
a lower setting.

WARNING

TO TURN OFF GAS TO HEATER

1. Turn control knob clockwise to OFF position to completely shut off the heater.

2.

If applicable: Turn off all electric power to the heater.

53D0501 23

18/24/30VL Unvented Gas Logs

Continued safe operation of this appliance requires, but is not limited to, these "Do's" and
"Don'ts":

DO'S

1. Do connect the appliance only tot he type of gas for which it is equipped to burn.

2. Do install the appliance and all gas piping according to local codes or, in the absence of local
codes, with the National Fuel Gas Code ANSI Z223.1/NFPA 54.

3. Do take the necessary precautions during any pressure testing of the appliance's gas supply
piping system.

4. Do install the appliance only in a fireplace suitable for the burning of solid fuel (wood or coal)
or in a VF32-R, VF36-R, VF42-R, EVB36, VF42 and VF3D ventless firebox enclosure.

5. Do use only joint compound (pipe dope) on threaded joints of gas piping that is resistant to the
action of liquefied petroleum gas.

6. Do include a manual shutoff valve, union and 1/8 inch N.P.T. plugged pressure tap ahead of
the controls.

7. Do use only ground joint unions in gas piping.

8. Do use only a soap and water solution or liquid gas leak solution when checking for leaks.

9. Do use a mesh firescreen any time the appliance is in operation.

10. Do keep the area around the appliance clear and free from combustible materials, gasoline
and any flammable or explosive material.

11. Do follow the lighting and operation procedures provided.

12. Do periodically inspect the flames of the pilot burner and main burners as described by this
manual.

13. Do clean the appliance and fireplace as described by this manual.

14. Do keep the logs properly placed.

15. Do provide ample fresh air when operating the appliance.

16. Do keep fireplace glass doors completely open any time the appliance is in operation.

SAFETY CHECKLIST

DON'TS

1. Don't modify or alter this appliance in any way.

2. Don't connect this appliance to any type of gas for which it is not equipped to burn.

3. Don't install this appliance in any area where gasoline or any flammable or explosive material
may be used or stored.

4. Don't use candles, matches or any source of ignition when checking for leaks.

5. Don't operate appliance without a mesh firescreen in place.

6. Don't install any accessories not provided by MHSC.

7. Don't install this appliance in a fireplace whose flue is serving a separate solid-fuel burning
appliance.

8. Don't burn solid fuels in a fireplace where this appliance is installed.

9. Don't block or restrict any grilles of a factory-built fireplace in which this appliance is
installed.

DO NOT TAMPER WITH PILOT LIGHT SAFETY

SYSTEM!

If appliance shuts off, do not relight until you provide fresh air.
If appliance continues to shut off, have it serviced. Keep burners and control compartment clean.

24 53D0501

MAINTENANCE

18/24/30VL Unvented Gas Logs

The appliance and fireplace should be inspected before
use and at least annually by a professional service
person. More frequent cleaning may be required due
to excessive lint from carpeting, bedding material, etc.
It is imperative that the control compartment, burners,
and circulation air passageways of the appliance be kept

Never force a drill, wire or any object into the
orifice of the pilot spud. Clean it only with forced
air.

CAUTION

clean. Air flowing through the fireplace and appliance
will cause dust and lint to collect on the appliance and interior surfaces of the fireplace. If
allowed to become excessive on the appliance, the dust and lint could cause the appliance
to operate improperly and produce hazardous levels of carbon monoxide. Airflow or water
vapor could also carry some of the dust and lint collected on the appliance and on the
interior surfaces of the fireplace into the space being served by the appliance.

Visually inspect the appliance and fireplace interior periodically and clean when necessary.
Do not use cleaning fluids. Be sure the appliance is off and cool before cleaning it and
the fireplace interior. When ready to clean, carefully remove all logs from the appliance;
then carefully vacuum or brush away any dust, lint and possible soot which may have
accumulated anywhere on the appliance and fireplace interior; pay particular attention to
the air intake areas of the appliance's pilot burner and main burners, as well as the flame
ports of the main burners. Vacuum or brush away any dust, lint and possible soot which
may have accumulated on each of the logs. (Do not remove the vermiculite particles glued
to some of the logs; these particles glow during operation of the appliance to produce
ember effect.)

After cleaning, replace the logs and resume normal operation of the appliance according to
the appliance's lighting and operation instructions. After the cleaning operation, the flames
from the burners may have red and orange streaks due to dust in the air. Those red and
orange streaks will disappear when the dust settles.

The pilot gas flow is not adjustable on this appliance. Proper operation of the ODS (oxygen
depletion sensor) pilot light safety system is dependent upon the pilot gas flow rate and
any attempt to adjust this rate could cause the ODS system to not operate correctly. It is
very important that the pilot be kept clean and free of dust, lint and soot. Should the pilot
flame show a yellow tip, clean the air intake of the pilot burner (Figure 5). The pilot orifice
spud is not replaceable for this pilot. Should it become plugged, clean it only with forced
air. Never force a drill, wire or any object into the orifice. Any increase in the orifice size
will cause the ODS system to not work as it is intended.

NOTICE: During times of construction or remodeling in the vicinity of this appliance, take
additional care to keep the air intake areas of the appliance pilot burner and main burners
clean; excessive airborne dust created by the construction or remodeling could clog these
air intake areas resulting in nuisance pilot outage and the production of carbon monoxide
and soot.

53D0501 25

18/24/30VL Unvented Gas Logs

MAINTENANCE

If this appliance is installed in a solid-fuel burning
fireplace with the flue damper open, a qualified service
person should examine and clean the venting system
of the solid-fuel burning fireplace at least once a year,
preferably before first use of the appliance each heating
season. The examination should include checking for
deterioration, obstruction, soot buildup or any condition
that might affect venting. If any factory-built part of the
venting system is damaged or deteriorated and required
replacement, use only parts listed for use with the
remaining vent system components. The use of unlisted
or incompatible components could cause a fire or carbon
monoxide hazard.

Any service which requires disconnecting the gas supply
line must be performed by a qualified service person. If the appliance is moved, even slightly, for
any reason, the gas supply lines must be rechecked for leaks immediately with a soap and water
solution or a liquid gas leak detector. If leaks are found, turn the gas off at the shutoff valve until
the leak is corrected.

Do not attempt to substitute control system components of any type other than as originally supplied
with this appliance. Substituted components will cause the appliance's Pilot Light Safety System
to not operate as it is intended.

Any safety screen or guard removed for servicing this appliance must be replaced prior to operating
this appliance.

If the appliance is moved even slightly , during
cleaning or log replacement, check for gas leaks.
Repair any gas leak before resuming normal
operation of the appliance.

CAUTION

Do not attempt to substitute control system
components of any type other than as originally
supplied with this appliance.

IMPORTANT

26 53D0501

TROUBLESHOOTING

18/24/30VL Unvented Gas Logs

While the manufacturer has made every reasonable effort to insure this appliance operates
properly and satisfactorily, sometimes problems do arise. The following troubleshooting
chart lists several problems with their probable cause and solution. Any adjustments and/or
replacements must be made by a qualified person. Do not replace any component with a
different type. Only use components supplied by the manufacturer of this appliance.

Problem Cause Solution
Flame too large Pressure regulator at gas supply Reset, using manometer

set too high
Defective regulator on appliance Replace regulator
Appliance's burner orifice too large Replace with correct size
Noisy flame Noisy pilot Check inlet pressure
Burr in orifice Remove burr or replace
Yellow tip flame on Clogged burner ports Clean ports
front main burner Misaligned orifice Realign or replace burner
Clogged burner air intake Clean intakes
Floating flame Insufficient primary air Clean burner's air intake area
Delayed ignition of Pilot flame too small Clean pilot and pilot orifice
top main burner Top main burner ports clogged Clean ports
Low pressure Check pressure. Adjust pressure regulator

at gas supply.
Pilot burner won't Main gas OFF Open shutoff valve.
ignite, or pilot flame Faulty ignition system Check for spark at pilot when pusing ignitor.

goes out Check wire connections.
Dirty pilot burner Clean pilot burner.
Main burners won't Defective control valve Replace control valve.

turn ON
Main burner won't Defective control valve Replace control valve.

turn OFF
Bottom main burner Ports of carryover tube clogged Clean ports.
won't ignite or is slow Bottom main burner clogged Clean ports.
to ignite Low pressure Check pressure. Adjust pressure regulator

at gas supply.
Soot or dark residue Improper log placement Position logs according to respective "Log

on logs or fireplace Placement" instructions.
Clogged burner ports Clean ports.
Clogged burner air intake Clean intakes.
Draft or ceiling fan affecting Eliminate draft.

burner flames Turn off ceiling fan.
Incorrect gas type Check appliance rating label.

Call dealer.

53D0501 27

18/24/30VL Unvented Gas Logs

Refractory Log Set

Fiber Log Set

1

2

3

4

5

6

7

8

11

12c

18

12b

12a

16

15

13

19

20

21

23

22

28

27

26

24

25

14

REPLACEMENT PARTS

28 53D0501

REPLACEMENT PARTS LIST

18/24/30VL Unvented Gas Logs

All repair part orders should be placed through your local dealer. To ensure prompt and accurate service, please
provide the following information when placing a repair part order: model number of your appliance, part name,
part number and quantity of parts needed. Also note, your model may use either Five Piece Refractory Logs or
Five Piece Fiber Logs. These different log types shall not be mixed.

Item Description Qty. 18VL 24VL 30VL

1. Pilot Assembly (Nat.) Manual/T-stat 1 26D2529 26D2529 26D2529

1. Pilot Assembly (LP) Manual/T-stat 1 14D0476 14D0476 14D0476

1. Pilot Assembly (Nat.) MIllivolt 1 14D0473 14D0473 14D0473

1. Pilot Assembly (LP) Millivolt 1 14D0477 14D0477 14D0477

2. Rear Burner 1 53D0152 53D0154 53D0154

3. Front Burner 1 53D0151 53D0153 53D0153

4. Restrictor Plate (Nat. Only) 1 53D0033 53D0033 53D0033

5. Grate Assembly 1 53D0028 53D0028 53D0028

6. Piezo Ignitor 1 14D0503 14D0503 14D0503

7. Cable 12" 1 00K0632 00K0632 00K0632

8. Front Cover - Manual/T-stat 1 53D0017 53D0017 53D0017

8. Front Cover - Millivolt 1 53D0019 53D0019 53D0019

9.

10. Manual/Millivolt Knob 1 18D0603 18D0603 18D0603

11. Thermostat Knob 1 18D0602 18D0602 18D0602

12a. Manual Valve (Nat.) 1 30D0201 30D0201 30D0201
12a. Manual Valve (LP) 1 30D0202 30D0202 30D0202
12b. Millivolt Valve (Nat.) 1 14D0467 14D0467 14D0467
12b. Millivolt Valve (LP) 1 14D0468 14D0468 14D0468
12c. T-Stat Valve (Nat./LP) 1 11V0701 11V0701 11V0701

13. Base Wrap 1

14. Regulator Manual/T-Stat (Nat. 1 24D0305 24D0305 24D0305

14. Regulator Manual/T-Stat (LP) 1 24D0306 24D0306 24D0306

15. Injector, Rear (Nat.) 1 57D0680 27D0420 27D0420

15. Injector, Rear (LP) 1 53D0714 62D3005 62D3005

16. Injector, Front (Nat.) 1 57D0680 57D0612 57D0612

16. Injector, Front (LP) 1 53D0714 53D0714 53D0714

17. Nut Mounting - Manual Valve 1 00F0586 00F0586 00F0586

18. tubing 3/16" Alum. 1 49D0050 49D0050 49D0050

19. Right Twig (Refractory) 1 078326 072970 072970

20. Back Log (Refractory) 1 078322 072966 070971

21. Middle Log (Refractory) 1 078323 072967 072972

22. Twig Left (Refractory) 1 072969 072969 072969

23. Front Log (Refractory) 1 078324 072968 072973

24. Log, Top #1 1 53D1503 53D1508 53D1513

25. Log, Top #2 1 53D1504 53D1509 53D1514

26. Log, Back 1 53D1500 53D1505 53D1510

27. Log, Middle 1 53D1501 53D1506 53D1511

28. Log, Front 1 53D1502 53D1507 53D1512

53D0501 29

18/24/30VL Unvented Gas Logs

30 53D0501

Gas Logs Limited Warranty

18/24/30VL Unvented Gas Logs

What is covered and for How Long

MHSC will make available replacement parts for parts that are defective according tot he following terms.

Logs - A free replacement will be made available at our factory for any logs if they fail due to deterioration within
two (2) years of the verified purchase.

Steel Burner - A free replacement will be amde available at our factory for the burner if it fails to deteriioration
within 10 years of the verified purchase date.

All Other Parts - A free replacement will be amde available at our factory for any part that is defective within two
(2) years of the verified purchase date.

What is Not Covered

– Removal and re-installation costs.
– Labor costs for replacement or repairs beyond our published warranty labor program.
– Transportation or shipping cost.
– The cost of a service call to diagnose trouble.
– Painted surfaces.
– Damage or defect caused by improper installation, accident, misuse, abuse or alteration.
– Replacement of rusted burner combustion chamber resulting from improper storage.

Limitations and Exclusions

1. No one has authority to add to or vary this limited warranty, or to create for MHSC any other obligation or

liability in connection with this heater/decorative gas appliance.

2. Any implied warranty applicable to this heater/decorative gas appliance is limited in duration to the same period

of time as this written warranty. Some states do not allow limitations on how long an implied warranty lasts, so
the above limitations may not apply to you.

3. MHSC shall not be liable for incidental, consequential, special or contingent damages you might suffer as

a result of its breach of written warranty or anyimplied warranty. Some states do not allow the exclusion or
limitation of indicental or consequential damages, so the above limitation or exclusion may not apply to you.

4. This warranty applies only to the original purchaser and may not be transferred.

5. This warranty applies only to a gas heater/decorative gas appliance used as a residential appliance.

6. If you cannot verify the purchase date of the heater/decorative gas appliance, the warranty period will begin

on the date the heater/decorative gas appliance was manufactured.

7. replacement or repair parts are warranted for the remaining period of the original part warranty. Warranty parts

must be obtained through authorized dealers of the prodcut and/or MHSC who will provide original factory
replacement parts. Failure to use original factory replacement parts voids this warranty.

This heater/decorative gas appliance must be installed by a qualified installer, operated and maintained in
accordance with all applicable codes and the instrucitons furnihsed with it.

IF WARRANTY SERVICE IS NEEDED...

1. Contact your supplier. Make sure you have your warranty, your sales receipt and the model/serial number of

your MHSC product.

2. DO NOT ATTEMPT TO DO ANY SERVICE WORK YOURSELF.

53D0501 31

MHSC

149 Cleveland Drive • Paris, Kentucky 40361

www.mhsc.com