mFi Mason-Lite VFLDB24L-EN User manual

INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
WARNING: If the information in this
manual is not followed exactly, a re or
explosion may result causing property
damage, personal injury, or loss of life.
— Do not store or use gasoline or oth-
er ammable 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 suppli-
er, call the re department.
— Installation and service must be per-
formed by a qualied installer, service
agency, or the gas supplier.
WARNING: Improper installation, adjust-
ment, alteration, service, or maintenance
can cause injury or property damage.
Refer to this manual for correct instal-
lation and operational procedures. For
assistance or additional information con-
sult a qualied installer, service agency,
or the gas supplier.
WARNING: This appliance has been spe-
cically tested and design certied for
installation only in a solid-fuel burning
replace, including factory-built UL127
replaces and masonry replaces, or in
a listed ventless rebox.
WARNING: This is an unvented gas-red
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 Air for
Combustion and Ventilation section on
pages 6 through 8 of this manual.
Installation & Opation Manual
Nat. Gas
Model #
VFLDB24L-EN
VFLDB36L-EN
VFLDB48L-EN
VFLDB60L-EN
VFLDB24B-EN
VFLDB36B-EN
VFLDB48B-EN
VFLDB60B-EN
Propane
Model #
VFLDB24L-EP
VFLDB36L-EP
VFLDB48L-EP
VFLDB60L-EP
VFLDB24B-EP
VFLDB36B-EP
VFLDB48B-EP
VFLDB60B-EP
Find a Dealer: [phone] | Mason-Lite.com

MASON-LITE • OPALESCENCE VENT-FREE BURNER | 
1 Safety Information 1
2 Product Identication 4
3 Specications 5
4 Air for Combustion and Ventilation 6
5 Installation 9
Installation and Clearances . . . . . . . . . . . . . . . . . . . . . . . . 10
Minimum Noncombustible Material Clearances . . . . . . . . . . . . . . . 10
Vented Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Installing Gas Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Installing Opalescence Burner. . . . . . . . . . . . . . . . . . . . . . . 14
Checking Gas Connections . . . . . . . . . . . . . . . . . . . . . . . .17
6 Operation 18
Multifunction Burner Remote Operation . . . . . . . . . . . . . . . . . . 18
LED Lighting Operation Instructions . . . . . . . . . . . . . . . . . . . . 22
Operating Instructions Label . . . . . . . . . . . . . . . . . . . . . . .24
Rating Plate Example . . . . . . . . . . . . . . . . . . . . . . . . . .25
7 Replacement Parts 26
8 Wiring Diagram 28
9 Maintenance 29
10 Troubleshooting 30
11 Warranty Information 32
table of contents

 |
welcome
ank you for purchasing this Mason-Lite Opalescence Vent-Free Burner. We are
proud to oer this quality product to add beauty and heating eciency into your home.
e Opalescence should be installed and used as an unvented supplemental heating
appliance. is owner’s manual provides complete instructions for safely installing,
operating, and maintaining your Opalescence. Read and save these instructions. Pay
close attention to all safety and operating instructions. Refer to this manual often to
ensure proper safety and operation.
For easy reference, record the product information.
Model Number: ______________________
Date Purchased: ______________________
Where Purchased: ______________________
If you have a question or problem,
call 1-800-345-7078
or visit mason-lite.com
Installer: Place Serial Number
label here.

MASON-LITE • OPALESCENCE VENT-FREE BURNER | 
1safety information
1. If you smell gas
• Shut off gas supply
• Do not try to light any appli-
ance
• 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 sup-
plier’s instructions
• If you cannot reach your gas
supplier, call the re depart-
ment
2. Due to high temperatures, this
appliance should be located
out of trafc and away from
furniture/draperies.
3. Children and adults should
be alerted to the hazard of
high surface temperatures
and should stay away to avoid
burns or clothing ignition.
4. Young children should be
carefully supervised when in
the same room with this appli-
ance.
5. Do not place clothing or any
ammable material on or near
your vent-free gas appliance.
Matches, paper, garbage or
any other material must not be
thrown on top of the burner or
into the ame.
6. Any safety screen, guard, or
barrier removed for servicing
this appliance must be re-
placed prior to operating the
heater.
7. Installation and repair should
be done by a qualied ser-
vice person. The appliance
should be inspected before
use and at least annually by a
professional service person.
Carbon Monoxide Poisoning: Early
signs of carbon monoxide poisoning re-
semblethe u,with headaches,dizziness,or
nausea. If you have these signs,the heater
may not be working properly. Get fresh
air at once! Have heater serviced. Some
people are more aected by carbon mon-
oxide than others.ese include pregnant
women,people with heart or lung disease
or anemia, those under the inuence of
alcohol, and those at high altitudes.
Natural Gas and Liquid Propane/LP
Gas: Natural gas and Liquid Propane/LP
gas is odorless. An odor-making agent is
added to the gas. e odor helps you de-
tect a gas leak. However, the odor added
to the gas can fade. Gas may be present
even though no odor exists.
Make certain you read and understand all
Warnings.Keep this manual for reference.
Itis yourguide tosafeand properoperation
of this heater.
WARNINGS
WARNING: Read this own-
er’s manual carefully and com-
pletely. Improper installation,
use, adjustment, servicing, and
maintenance of this heater can
cause property damage, serious
injury or death from burns, re,
explosion, electrical shock, and
carbon monoxide poisoning.
Installation and service must
be performed by a qualied
installer, service agency or the
gas supplier.
DANGER: Carbon monoxide
poisoning may lead to death!
WARNING: Any change to
this heater or its controls can be
dangerous.
WARNING: This appliance is
equipped for either Natural Gas
or Liquid Propane (LP) gas. Only
use the type of gas indicated on
the rating plate. Field conversion
for use with other gases is not
permitted.
WARNING: This product can
expose you to chemicals including
carbon monoxide, lead and lead
compounds, which are known to
the State of California to cause
cancer, birth defects or other re-
productive harm. For more infor-
mation, go to www.P65Warnings.
ca.gov.
WARNING: FIRE, EXPLOSION,
AND ASPHYXIATION HAZARD
Improper adjustment, alteration,
service, maintenance, or installa-
tion of this heater or its controls
can cause death or serious injury.
Read and follow instructions and
precautions in User’s Information
Manual provided with this h eater.
This appliance is intended for
supplemental heating.

|
combustible material between
the base of the replace and
any surface of the combusti-
ble ooring.
13. At least 10”-12” of noncom-
bustible or heat-resistant
material is required above the
replace. A replace hood
will be required to act as a
heat deector in protecting
combustible replace sur-
rounds (facing and/or mantel)
if certain minimum clearanc-
es cannot be met (see the
“Clearances to Combustibles”
section).
14. All models of this heater have
an input rating of more than
10,000 BTU/hr and shall not be
installed in a bedroom or bath-
room (ANSI Z21.11.2).
15. WARNING: Failure to keep the
primary air opening(s) of the
burner(s) clean may result in
sooting and property damage.
16. When installing as a decorative
vented appliance, the unit must
conform to all local codes or,
in the absence of local codes,
to the National Fuel Gas Code
ANSI Z223.1/NFPA 54.
17. The appliance and its appli-
ance main gas valve must be
disconnected from the gas
supply piping system during
any pressure testing of that
system at test pressure in
excess of ½ psi (3.5 kPa). The
appliance must be isolated
from the gas supply piping
system by closing its equip-
ment shutoff valve during any
pressure testing of the gas
supply piping system at test
pressure equal to or less than
½ psi (3.5 kPa).
18. Keep the area around your gas
appliance clear of combusti-
ble materials, gasoline, and
any other ammable vapors/
liquids. Be especially cautious
if the gas appliance is installed
in a basement or converted
garage.
19. Do not us this appliance if any
part has been underwater.
Immediately call a qualied
professional service techni-
cian to inspect the appliance
and to replace a part of the
control system and any gas
control which has been under
water.
20. Perform a periodic visual
check of the pilot and burner
ame.
21. WARNING: This appliance
is for installation only in a
solid-fuel burning masonry or
Ul 127 factory-built replace
or in a listed ventless rebox
enclosure. It has been design
certied for these installa-
tions.
Exception: DO NOT Install this
appliance in a factory-built
replace that includes instruc-
tions stating it has not been
tested or should not be used
with unvented gas logs.
22. WARNING: Before installing in
a solid-fuel burning replace,
the chimney ue and rebox
must be cleaned of soot, cre-
osote, ashes, and loose paint
by a qualied chimney cleaner.
23. WARNING: Do not allow fans
to blow directly into the re-
place. Avoid any drafts that
alter burner ame patterns.
More frequent cleaning may
be required due to excessive
lint from carpeting, bedding
material etc. It is imperative
that control compartments,
burners, and circulating air
passageways of the appliance
be kept clean.
8. Do not block air intakes and
maintain adequate clearances
to enable the free ow of air.
9. This heater shall not be
installed in a room or space
unless the required volume
of indoor combustion air
is provided by the method
described in the National Fuel
Gas Code, ANSI Z223.1/NFPA
54, the International Fuel Gas
Code, or applicable local
codes.
10. This heater needs fresh,
outside air ventilation to run
properly. This heater has
an oxygen depletion sensor
(ODS) pilot light safety sys-
tem. The ODS shuts down the
heater if not enough fresh air
is available. See Air for Com-
bustion and Ventilation, pages
6 through 8. If heater keeps
shutting off, see Troubleshoot-
ing, pages 30 and 31.
11. Provide adequate clearances
for servicing and operation.
12. Do not install this appliance
directly on combustible oor-
ing. Be certain that the top
surface of the combustible
ooring material (i.e. carpet,
tile, etc.) is not too close to
this gas appliance. If this ap-
pliance is at oor level or less
than 6” above the top surface
of the ooring material, there
must be at least 12” of non-
Chapter 1: Safety Information

MASON-LITE • OPALESCENCE VENT-FREE BURNER | 
24. WARNING: Do not use a
blower insert, heat exchanger
insert or other accessory not
approved for use with this
heater.
25. For unvented installation in
bedrooms or bathrooms, the
burner base assembly must
be secured to the replace or
the rebox oor in accordance
with these installation instruc-
tions, as applicable.
26. A replace screen must be in
place when this appliance is
operating, unless other provi-
sions for combustion air are
provided, the screen has an
opening(s) for introduction of
combustion air.
27. It is important to use this
appliance in the minimum size
replace as indicated in the
“Minimum Firebox Size” sec-
tion showing the height, width,
and depth.
28. Solid fuels must not be burned
in the replace where this
unvented gas appliance is
installed.
29. Glass doors must be fully
open when this vent-free gas
appliance is operating. Do
not operate this appliance if
glass doors are closed. This
can lead to sooting, burner
outages, and possible glass
explosion, causing damage or
injury.
30. Any outside air ducts and/
or ash dumps located on the
oor or walls of the replace
must be permanently sealed
shut before the installation.
Use heat-resistant sealant. Do
not seal chimney ue damper.
31. State and local codes may
only allow operation of this
appliance in a vented cong-
uration. Check your state or
local codes.
32. If any soot appears on the
appliance or other areas of
the replace in which this
appliance is installed, shut the
system off and call a qualied
professional service techni-
cian, vent-free gas burner sys-
tem technician, or your local
gas company.
33. This appliance may be in-
stalled in an aftermarket,
permanently located, manu-
factured (mobile) home where
not prohibited by local codes.
Installation of appliances
designed for manufactured
homes or mobile homes must
conform with Manufactured
Home Construction and Safety
Standards, Title 24 CFR, Part
3280 in the U.S.; or with CAN/
CSA Z240 MH, Mobile Hous-
ing in Canada; or with ANSI/
NCSBCS A225.1/NFPA 501A,
Manufactured Home Instal-
lations Standard when none
of the previously referenced
standards are applicable.
FIRE RISK HAZARD / DELAYED IGNITION
High supply pressure will damage the valve / controls.
Disconnect the appliance main gas valve/control from
the supply piping when pressure testing that system
at pressures in excess of 1/2 psi (3.5 kPa).
Isolate the appliance with it’s shut off valve during
any pressure testing of the supply piping at pressures
equal to or less than 1/2 psi (3.5 kPa).
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH
GLASS UNTIL COOLED.
NEVER ALLOW CHILDREN
TO TOUCH GLASS.

|
Product Features
Operation
is heater is clean burning.It requires no
outside venting.ere is no heat loss out a
vent or up a chimney.Heat is generated by
realistic,dancing yellowames.isheater
is designed for vent-free operation with
ue damper closed. State and local codes
in some areas prohibit the use of vent-free
heaters.You can operate heater as a vented
product by opening the ue damper.
Safety Pilot
is heater has a pilot with an Oxygen
Depletion Sensor (ODS) safety pilot sys-
tem. e ODS/pilot is a required feature
for vent-freeroomheaters.eODS/pilot
senses the amount of oxygen available in
the room and shuts the burner o if the
oxygen drops below 18%.
2product identication
A. Handles
B. Case
C. Burner
D. Gas Valve
E. Gas Valve Cover
F. Base
G. IFC Board
H. ProFlame Receiver
I. Pilot
J. Power Cord
K. LED Lights
L. Multifunction Burner Remote
M. LED Remote
Figure 2.1 - Opalescence Vent-Free Burner
F
C
E
K
K
DI
G
J
K
K
M
H
A
L
B
A
Chapter 2: Product Identication

MASON-LITE • OPALESCENCE VENT-FREE BURNER | 
Inlet Inlet
BTU BTU Manifold Pressure Pressure
NG Models High Low Pressure Minimum Maximum
VFLDB24L-EN 16,000 10,000 3.5”W.C. 5” 10.5”
VFLDB36L-EN 32,000 20,000 3.5”W.C. 5” 10.5”
VFLDB48L-EN 39,500 27,000 3.5”W.C. 7” 10.5”
VFLDB60L-EN 39,500 27,000 3.5”W.C. 7” 10.5”
VFLDB24B-EN 16,000 10,000 3.5”W.C. 7” 10.5”
VFLDB36B-EN 32,000 20,000 3.5”W.C. 5” 10.5”
VFLDB48B-EN 39,500 27,000 3.5”W.C. 5” 10.5”
VFLDB60B-EN 39,500 27,000 3.5”W.C. 5” 10.5”
LP Models
VFLDB24L-EP 16,000 9,000 10”W.C. 11” 14”
VFLDB36L-EP 32,000 16,000 10”W.C. 11” 14”
VFLDB48L-EP 39,500 18,000 10”W.C. 11” 14”
VFLDB60L-EP 39,500 18,000 10”W.C. 11” 14”
VFLDB24B-EP 16,000 9,000 10”W.C. 11” 14”
VFLDB36B-EP 32,000 16,000 10”W.C. 11” 14”
VFLDB48B-EP 39,500 18,000 10”W.C. 11” 14”
VFLDB60B-EP 39,500 18,000 10”W.C. 11” 14”
3specications
Table 1 - Specications

|
4air for combustion and ventilation
Chapter 4: Air for Combustion and Ventilation
Providing Adequate
Ventilation
e following is excerpts from National
Fuel Gas Code. NFPA 54/ANSI Z223.1,
Section 5.3, Air for Combustion and
Ventilation.
All spaces in homes fall into one of the
three following ventilation classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space.
e information on pages 6 through 8 will
help you classify your space and provide
adequate ventilation.
All fuel-burning appliances need fresh air
for proper combustion and ventilation.
Exhaust fans, replaces, clothes dryers,
and fuel burning appliances draw air from
the house to operate. You must provide
adequate fresh air for these appliances.
is will insure proper venting of vented
fuel-burning appliances.
WARNING: This heater shall
not be installed in a conned
space unless you provide ad-
equate combustion and ven-
tilation air. Read the following
instructions to insure proper
fresh air for this and other fu-
el-burning appliances in your
home.
Unusually Tight Construction
e air that leaks around doors and win-
dows may provide enough fresh air for
combustion and ventilation. However, in
buildings of unusually tight construction,
you must provide additional fresh air.
Unusuallytightconstructionisdened
as construction where:
a. Walls and ceilings exposed to
the outside atmosphere have a
continuous water vapor retarder
with a rating of one perm (6x10-
11 kg per pa-sec-m2) or less with
openings gasketed or sealed and
b. Weather stripping has been add-
ed on openable windows and
doors and
c. Caulking or sealants are applied
to areas such as joints around
window and door frames, be-
tween sole plates and floors,
between wall-ceiling joints, be-
tween wall panels, at penetra-
tions for plumbing, electrical, and
gas lines, and at other openings.
If your home meets all of the three
criteria above, you must provide ad-
ditional fresh air. See Ventilation Air
From Outdoors, page 8.
If your home does not meet all of the
threecriteriaabove,proceedtoDeter-
mining Air Flow For Heater Location,
page 7.
Conned and Unconned
Space
The National Fuel Gas Code (AN-
SIZ223.1, 1992 Section 5.3) defines
conned and unconned spaces.
A conned space is a space where the vol-
ume is less than 50 cubic feet per 1,000 Btu
per hour (4.8 m3per kw) of the aggregate
input rating of all appliances installed in
that space.
An unconned space as a space where the
volumeis atleast 50cubic feetper1,000Btu
per hour (4.8 m3per kw) of the aggregate
input rating of all appliances installed in
that space.
Rooms communicating directly with the
space in which the appliances are in-
stalled*, through openings not furnished
with doors, are considered a part of the
unconned space.
* Adjoining rooms are communicating
only if there are doorless passageways or
ventilation grills between them.

MASON-LITE • OPALESCENCE VENT-FREE BURNER | 
Determining Air Flow For
Heater Location
Determining if You Have a Conned
or Unconned Space
Use this work sheet to determine if you
have a conned or unconned space.
Space: Includes the room in which you
will installheaterplus any adjoiningrooms
with doorless passageways or ventilation
grills between the rooms.
1. Determine the volume of the space
(length x width x height).
Length x Width x Height =
cu. ft. (volume of space)
Example: Space size 20 ft. (length)
x 16 ft. (width) x 8 ft. (ceiling height)
= 2560 cu. ft. (volume of space)
If additional ventilation to adjoin-
ing room is supplied with grills or
doorless openings, add the volume
of these rooms to the total volume of
the space.
2. Divide the space volume by 50 cubic
feet to determine the maximum Btu/
Hr the space can support.
_______________ (volume ofspace)
÷ 50 cu. ft. = (maximum Btu/Hr the
space can support)
Example: 2560 cu. ft. (volume of
space) ÷ 50 cu. ft. = 51.2 or 51,200
(maximum Btu/Hr the space can
support)
3. Add the Btu/Hr of all fuel burning
appliances in the space.
Vent-free heater ______Btu/Hr
Gas water heater* ______Btu/Hr
Gas furnace ______Btu/Hr
Vented gas heater ______Btu/Hr
Gas replace burner ______Btu/Hr
Other gas appliances* ______Btu/Hr
TOTAL ______ Btu/Hr
Example:
Gas water heater .................. 40,000 Btu/Hr
Vent-free heater .................. 31,500 Btu/Hr
TOTAL ................................... 71,500 Btu/Hr
* Do not include direct-vent gas appli-
ances. Direct-vent draws combustion
air from the outdoors and vents to the
outdoors.
4. Compare the maximum Btu/Hr the
space can support with the actual
amount of Btu/Hr used.
____________Btu/Hr (maximum
the space can support)
____________Btu/Hr (actual
amount of Btu/Hr used)
Example: 51,200 Btu/Hr (maximum
the space can support)
71,500 Btu/Hr (actual amount of Btu/
Hr used)
espace inthe aboveexample isa conned
space because the actual Btu/Hr used is
more than the maximum Btu/Hr the space
can support. You must provide additional
fresh air. Your options are as follows:
A. Rework worksheet, adding the space
of an adjoining room. If the extra
space provides an unconned space,
remove door to adjoining room or add
ventilation grills between rooms. See
Ventilation Air From Inside Building,
page 8.
WARNING: If the area in
which the heater may be oper-
ated is smaller than that dened
as an unconned space, provide
adequate combustion and venti-
lation air by one of the methods
described in the National Fuel
Gas Code, ANSI Z223.1, 1992,
Section 5.3 or applicable local
codes.
B. Vent room directly to the outdoors.
See Ventilation Air From Outdoors,
page 8.
C. Install a lower Btu/Hr heater,if lower
Btu/Hr size makes room unconned.
If the actual Btu/Hr used is less than the
maximum Btu/Hr the space can support,
the space is an unconned space.You will
need no additional fresh air ventilation.

|Chapter 4: Air for Combustion and Ventilation
Ventilation Air
Ventilation Air From Inside
Building
isfreshairwouldcome fromanadjoining
unconned space.When ventilating to an
adjoiningunconnedspace,youmust pro-
vide two permanent openings: one within
12" of the ceiling and one within 12" of
the oor on the wall connecting the two
spaces (see options 1 and 2, Figure 4.1).
You can also remove door into adjoining
room (see option 3, Figure 4.1). Follow
the National Fuel Gas Code NFPA 54/
ANSI Z223.1, Section 5.3, Air for Com-
bustion and Ventilation for required size
of ventilation grills or ducts.
WARNING: Rework work-
sheet, adding the space of the
adjoining unconfined space.
The combined spaces must
have enough fresh air to supply
all appliances in both spaces.
Ventilation Air From Outdoors
Provide extra fresh air by using venti-
lation grills or ducts. You must provide
two permanent openings: one within 12"
of the ceiling and one within 12" of the
oor. Connect these items directly to the
outdoors or spaces open to the outdoors.
esespaces include atticsand crawlspaces.
IMPORTANT: Do not provide openings
for inlet or outlet air into attic if attic
has a thermostat-controlled power vent.
Heated air entering the attic will activate
the power vent.
Figure 4.1 - Ventilation Air from Inside Building
Figure 4.2 - Ventilation Air from Outdoors
Or
Remove
Door into
Adjoining
Room,
Option
3
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills
Into Adjoining
Room,
Option 1
12"
12"
Outlet
Air
Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic

MASON-LITE • OPALESCENCE VENT-FREE BURNER | 
WARNING: Never install the
heater
• In a bedroom or bathroom
unless installed as a vented
appliance (see page 9)
• In a recreational vehicle
• Where curtains, furniture,
clothing, or other amma-
ble objects are less than 36
inches from the front, top, or
sides of the heater
• In high trafc areas
• In windy or drafty areas
NOTICE: A qualied service per-
son must install heater. Follow
all local codes.
WARNING: Before installing
in a solid fuel burning replace,
the chimney ue and rebox
must be cleaned of soot, cre-
osote, ashes and loose paint
by a qualied chimney cleaner.
Creosote will ignite if highly
heated. Inspect chimney ue for
damage. If damaged, operate
heater with ue damper closed.
WARNING: Seal any fresh
air vents or ash clean-out doors
located on oor or wall of re-
place. If not, drafting may cause
pilot outage or sooting. Use a
heat-resistant sealant. Do not
seal chimney ue damper.
CAUTION: This heater cre-
ates warm air currents. These
currents move heat to wall sur-
faces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where impurities in the air (such
as tobacco smoke) exist, may
discolor walls.
Check Gas Type
IMPORTANT:Vent-free heaters add mois-
ture to the air. Although this is benecial,
installing heater in rooms without enough
ventilation air may cause mildew to form
from too much moisture.See Air for Com-
bustion and Ventilation, pages 6 through 8.
NOTICE: State or local codes
may only allow operation of
this appliance in a vented con-
guration. Check your state or
local codes.
5installation
Use only the gas type indicated on the
heater’s rating plate. If your gas supply is
dierent, do not install heater. Call dealer
where you bought heater for proper type
heater.
WARNING: This appliance is
equipped for either Natural Gas
or Liquid Propane (LP) gas. Only
use the type of gas indicated on
the rating plate. Field conversion
for use with other gases is not
permitted.

 |
Minimum
Noncombustible
Material Clearances
If Not Using Mantel
You musthave noncombustiblematerial(s)
above the replace opening. Noncombus-
tible materials (such as slate, marble, tile,
etc.) must be at least 5/8-inch thick. Do
not install sheet metal over combustible
material. With sheet metal, you must
have noncombustible material behind it.
Noncombustible material must extend at
least 22.5 inches up (for all models). If
noncombustible material is less than 22.5
inches, you must install a replace hood.
See Figures 5.3, page 11 for minimum
clearances.
IMPORTANT: If you cannot meet these
minimum clearances, you must operate
heater with chimney ue damper open.
Go to Vented Installation, page 12.
If Using Mantel
You musthave noncombustiblematerial(s)
above the replace opening. Noncombus-
tible materials (such as slate, marble, tile,
etc.) must be at least 5/8-inch thick. Do
not install sheet metal over combustible
material. With sheet metal, you must
have noncombustible material behind it.
Noncombustible material must extend at
least 22.5 inches up (for all models). If
noncombustible material is less than 22.5
inches,you must install the replace hood.
Even if noncombustible material is more
than 22.5 inches, you may need a hood
accessory to deect heat away from your
mantel shelf. See Figures 5.3, page 11 for
minimum clearances.
IMPORTANT: If you cannot meet these
minimum clearances, you must operate
heater with chimney ue damper open.
Go to Vented Installation, page 12.
NOTICE: Manual control heat-
ers may be used as a vented
product. If so, you must always
run heater with chimney ue
damper open. If running heater
with damper open, non-com-
bustible material above re-
place opening is not needed. Go
to Vented Installation, page 12.
WARNING: Maintain the
minimum clearances. If you can,
provide greater clearances from
oor, ceiling, and adjoining wall.
Carefully followtheclearances to combus-
tiblematerialsspeciedin thismanual.is
will ensure safe installation into a masonry,
U.L.listedmanufacturedreplace,or AGA
design certied vent free rebox listed for
use with these models.
Minimum Clearances to
Combustibles
A. Provide at least 12 inches clearance
from the side of the replace opening
to combustible walls, furniture, or
other objects.
B. Provide at least 36 inches clearance
from the top of the replace opening
to the ceiling.
C. Provide at least 36 inches clearance
from the front of the replace open-
ing to combustible objects.
D. Provide at least 1 inch clearance from
the back of the burner
Ceiling:
36"
Front: 36"
Left &
Right Sides:
12"
Figure 5.1 - Minimum Clearance to Wall and
Ceiling
Installation and
Clearances
(Vent-Free Operation Only)
Minimum Firebox Size
NG/ Front Rear
LP Width Width Depth Height
24 24” 24” 15” 20”
36 36” 36” 15” 20”
48 48” 48” 15” 20”
60 60” 60” 15” 20”
Table 2 - Minimum Clearances to Combusti-
ble Materials
Table 3 - Minimum Firebox Size
Minimum Clearances to
Combustible Materials (inches)
All Models
Front Ceiling Left Right
36” 36” 12” 12”
Chapter 5: Installation

MASON-LITE • OPALESCENCE VENT-FREE BURNER | 
Figure 5.2 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
Heat Resistant
Material
(A)
Heat Resistant
Material
8”
10”
12”
Mantel Shelf
Distances to
Underside of
Mantel
Top of
Fireplace
Opening
6”
4”
2”
A B C D E F
Mantel Clearances
In addition to meeting non-combustible
material clearances, you must also meet
required clearances between fireplace
opening and mantel shelf. If you do not
meet the clearances listed below, you will
need a hood.
Determining Minimum Mantel
Clearance
If you meet minimum clearance between
mantel shelf and top of replace opening,
a hood is not required (see Figure 5.3).
Ifyourinstallation doesnot meet theabove
minimum clearances, you must:
• Operate the burner only with the
ue damper open, OR
• Raise the mantel to an acceptable
height, OR
• Remove the mantel.
Minimum Clearances to Underside of Mantel (without hood)
Dimensions in Inches
Model A B C D E F
24 18 20 22 24 26 28
36 18 20 22 24 26 28
48 18 20 22 24 26 28
60 18 20 22 24 26 28
Figure 5.3 - Minimum Mantel Clearances Without Using Hood
Table 4 - Minimum Clearances to Underside of Mantel

 |
Vented Installation
State and local codes may only
allow operation of this appliance
in a vented conguration. Check
your state or local codes.
When installing as a decorative
vented appliance, the unit must
conform to all local codes or, in
the absence of local codes, to
the National Fuel Gas Code ANSI
Z223.1/NFPA 54.
Installing Damper Clamp
Accessory for Vented
Operation
NOTE: When usedasa ventedheater,appli-
ance must be installed only in a solid-fuel
burning replace with a working ue and
constructed of noncombustible material.
You mayuse thisheateras aventedproduct.
ere are three reasons for operating your
heater in the vented mode.
1. e replace does not meet the clear-
ance to combustibles requirements for
vent-free operation.
2. State or local codes do not permit
vent-free operation.
3. You prefer vented operation.
If reasons 1 or 2 apply, you must perma-
nently open the chimney ue damper and
provide a minimum ue opening. ere
are various methods for doing this. Some
methods may be restricted in your area.
Check all local codes that apply to you.
For your convenience, a damper clamp is
provided with this heater. Use this clamp
where not prohibited by local codes. is
will insure vented operation (see Figure
5.7). e damper clamp will keep the
damper open, allowing the heater to vent
up the replace ue.
Use the 3” adjustable bolt to adjust the
damper to the correct opening, based on
the venting chart in Table 3.
Table 3 - Chimney Damper Openings for Vented Operation
Table 4 - Area of Round Flues
Chimney Damper Openings for Vented Operation
Area of Various Standard
Round Flues
Diameter Area (sq. ins.)
5” 20 Sq. Inches
6” 29 Sq. Inches
7” 39 Sq. Inches
8” 51 Sq. Inches
Free Opening Area of Chimney Damper
for Factory-Built Fireplaces
Chimney Appliance Input Rating (kBTU/hr)
Height (ft)* 16k 20k 30k 40k
Minimum Opening inches2
10 11.3 11.3 16.6 22.11
15 8.6 8.6 12.6 17.3
20 7.5 7.5 10.8 14.5
25 6.6 6.6 9.6 12.6
30 6.2 6.2 9.1 11.3
35 5.7 5.7 8 10.8
40 5.6 5.6 7.5 10.2
Free Opening Area of Chimney Damper
for Masonary-Built Fireplaces
Chimney Appliance Input Rating (kBTU/hr)
Height (ft) 16k 20k 30k 40k
Minimum Opening inches2
6 17.6 17.6 25.7 33.8
8 16.5 16.5 23.7 31.2
10 15.1 15.1 21.7 28.7
15 14.1 14.1 19.9 26.1
20 12.9 12.9 18.5 23.7
30 12.2 12.2 16.9 21.6
* Height is from hearth to top of chimney and the minimum height is 10 feet.
Chapter 5: Installation

MASON-LITE • OPALESCENCE VENT-FREE BURNER | 
Figure 5.7 - Attaching Damper Clamp
Damper
Clamp Damper
Masonry Fireplace
Manufactured Fireplace
3” Adjustable Bolt Installing Gas Supply
NOTICE: A qualied service per-
son must connect heater to gas
supply. Follow all local codes.
Installation Items Needed
Before installing heater, make sure you
have the items listed below.
• Piping (check local codes)
• Approved pipe joint sealant (resis-
tant to LP gas)
• Manual shuto valve *
• Test gauge connection *
• Sediment trap
• Tee joint
• Pipe wrench
* An A.G.A. design-certied manual
shuto valve with 1/8" NPT tap is an
acceptable alternative to test gauge con-
nection. Purchase the optional A.G.A.
design-certied manualshutovalvefrom
your dealer.
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
your local codes. Use pipe of
1/2" diameter or greater to allow
proper gas volume to heater. If
pipe is too small, undue loss of
pressure will occur.
WARNING: Never connect
heater to private (non-utility)
gas wells. This gas is commonly
known as well-head gas.
Installation must include a manual shuto
valve, union, and plugged 1/8" NPT tap.
LocateNPTtapwithinreachfortestgauge
hook up.NPT tap must be upstream from
heater (see Figure 5.8).
Figure 5.8 - Gas Connection
* Purchase the optional A.G.A. design-certied
manual shuto valve from your dealer.
**See Specications,page5,for minimuminletpressure
forpurpose of inputadjustmentforeachburnermodel.
Install sediment trap in supply line as
shown in Figure 5.8. Locate sediment
trap where it is within reach for cleaning.
Locatesedimenttrap wheretrappedmatter
isnotlikely tofreeze.A sediment trap traps
moisture and contaminants. is keeps
them from going into heater controls. If
sediment trap is not installed or is installed
wrong, heater may not run properly.
CAUTION: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
3" Min.
Tee Joint
Pipe
Nipple
Cap
Sediment
Trap
A.G.A. Design-Certied
Manual Shuto Valve
With 1/8" NPT Tap*
Approved Flexi-
ble Gas Hose (if
allowed by
local codes)
From Gas
Meter or
Propane
Tank **
Apply pipe joint sealant lightly to male
threads. is will prevent excess sealant
from going into pipe. Excess sealant in
pipe could result in clogged heater valves.

 |
Installing Opalescence
Burner
CAUTION: Do not pick up
heater base assembly by the
burner. This could damage
heater. Only handle assembly
by base.
WARNING: Installation
should be done by a qualied
service person. The appliance
should be inspected before use
and at least annually by a pro-
fessional service person.
Donot separatethealuminuminformation
tags from the heater. ese tags contain
important information about operating
and servicing your heater.
Installation Items Needed
• Adjustable wrench
• Angled cutting pliers
• Safety glasses and gloves
• Approved pipe joint sealant (resis-
tant to LP gas)
• Manometer
• Leak detection uid (non-corro-
sive) or electronic gas detector
• Appropriate gas supply line parts
Step 1
Clean the replace/rebox of any dirt and
debris. Provide openings in the replace/
rebox for the electrical cord and the inlet
gas line.
Step 2
Using angled cutting pliers, cut the ship-
ping wire that holds the LED light tracks
in place. Discard this wire.
Step 3
Place the burner base assembly in the re-
place/rebox. Orient the burner assembly
sotheelectrical cordand gas valve isclosest
to the electrical opening and gas inlet hose
opening.Center the base front to back and
side to side.
Step 4
Unclip and remove the LED light track
that runs above the burner’s gas valve.is
will allow you best access for connecting
the inlet gas line.
Step 5
Lightly apply pip joint sealant to the male
threads of the gas valve inlet connector.
Connect an approved exible gas hose to
the burner assembly gas valve. Tighten
the exible gas hose connector with an
adjustable wrench.
Chapter 5: Installation

MASON-LITE • OPALESCENCE VENT-FREE BURNER | 
Hard Wire Installation:
WARNING:Hard-wiredelectri-
cal connection should be done by
a qualied electrician.
e electrician will do the following: Re-
move the electrical box cover. Disconnect
the pigtail wire nuts. Remove the six-foot
electrical cord. Feed line voltage electrical
wire through the replace wall and to the
electrical box.Connect the burner wires to
the correct line voltage wires and tighten
with wire nuts. Replace the electrical box
cover.
Step 6
Using Six-Foot Power Cord: Feed the
power cord through the opening provided
in the replace/rebox. Plug the cord into
a 110v receptacle.
Continued
Step 7
Syncing and Initializing the
Remote System
e remote and receiver are synced at the
factory. Steps 4 and 5 below may not be
needed. If you need to re-sync the Multi-
functionBurner RemoteandtheProFlame
Receiver, follow steps 4 and 5 below.
1. Remove the ProFlame Receiver.
Open the battery backup cover.Install
four AA batteries and replace the
cover.
2. Open the battery cover on the Multi-
function Burner Remote.Install three
AAA batteries and replace the cover.
3. Set the ProFlame Receiver slide
switch to the REMOTE position.
IMPORTANT: Only operate this
burner system in the REMOTE po-
sition. Never set the slide switch
to either OFF or ON.
4. Press and release the“PRG”button on
the ProFlame Receiver.e Receiver
will beep three times to indicate it is
ready to sync with the Multifunction
Burner Remote within the next 10
seconds.
5. Quickly take the Multifunction
Burner Remote and press the ON
button. The ProFlame Receiver
will beep four times to indicate the
Remote’s command is accepted. e
ProFlame Receiver set to the match-
ing code of the Multifunction Burner
Remote. e system is now synced
and initialized.

 |
Step 10
Grasp the handles on each end of the
case. Lift the case and carefully place the
case over the burner assembly. Make sure
the cover is correctly centered on the
burner assembly. e burner tube should
be centered in the cover opening.
IMPORTANT: Larger units may require
two people to install the case.
Step 11
Wearing protective gloves, pour the 1/2”
reective glass media over the top of the
burner tube and the perforated metal of
the case.
IMPORTANT: For proper burner ignition,
have no more than one layer of glass over
the top of the burner tube. Do not cover
the pilot shield or any of the burner ports
with glass media. You may need to move
pieces of glass o the burner ports (holes).
It is acceptable to have glass on the burner
as long as the ports are not blocked. Keep
the pilot and pilot shield clear of all debris.
Follow the chart below to ensure you use
the proper amount of glass media.
Table 5 - Glass Media
Glass Media Amount
Burner Glass Media
Size To Use
24” 10 Pounds
36” 15 Pounds
48” 20 Pounds
60” 25 Pounds
Step 9
Check all gas connections between the gas
meter(NGmodels) or supply tank(Liquid
Propane/LP gas) to the burner system.
Follow the instruction under Checking Gas
Connections, page 17.
IMPORTANT:Thismustbedonebefore
moving to Step 10.
Chapter 5: Installation
Pilot Shield
Step 8
Test the LED lights. Make sure the
power cord is plugged in or a hard-
wired electrical connection is made (see
Step 6, page 15). Make sure batteries
are installed in the LED remote. Press
the LED remote ON/OFF button. e
LED lights should turn on.