Desa VUL18NR, VUL24NR, VUL18PR, VUL36NR, VUL24PR Owner's Operation And Installation Manual

UNVENTED (VENT-FREE) GAS LOG HEATER

OWNER’S OPERATION AND INSTALLATION MANUAL

Remote-Ready Models VUL18/24/30/36(N,P)R

Thermostatically-Controlled Models VUL18/24/30/36(N,P)T

Remote-Ready Models Also Design-Certied As Vented Decorative Appliances

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 other 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 supplier, call the re
department.

— Installation and service must be performed by a quali-

ed installer, service agency or the gas supplier.

INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.

For more information, visit www.desatech.com

TAbLE OF CONTENTS

Safety .................................................................. 2

Unpacking............................................................ 5

Product Identication ........................................... 5

Local Codes......................................................... 5

Optional Remote Control Accessories ................. 5

Air For Combustion and Ventilation ..................... 6

Product Features ................................................. 6

Installation ........................................................... 9

Operation ........................................................... 20

Inspecting Burners............................................. 26

Cleaning and Maintenance ................................ 27

SAFETy

Wiring Diagram .................................................. 28

Troubleshooting ................................................. 29

Optional Positioning of

Thermostat Sensing Bulb ............................. 33

Specications .................................................... 33

Parts .................................................................. 34

Service Hints ..................................................... 40

Technical Service............................................... 40

Replacement Parts ............................................ 40

Accessories ....................................................... 40

Warranty .............................................. Back Cover

WARNING: Improper

installation, adjustment,

alte ration , serv ice or
maintenance can cause

injury or property dam­age. Refer to this manual

for correct installation

and operational proce­dures. For assistance or

additional information

consult a qualified in­staller, service agency or
the gas supplier.

WARNING: This ap-

pliance is for installation
only in a solid-fuel burning

masonry or UL127 fac-

tory-built replace or in a
listed ventless rebox en­closure. It is design-certi­ed for these installations

in accordance with ANSI

Z21.11.2. Exception: Do
not install this appliance
in a factory-built replace

that includes instructions

stating it has not been test­ed or should not be used
with unvented gas logs.

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 page 6

of this manual.

This appliance may be in-

stalled in an aftermarket,*

per man ent ly l oca ted ,
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.

* Aftermarket: Completion of sale, not for
purpose of resale, from the manufacturer

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122001-01C2

SAFETy

Continued

WARNING: This product con-

tains and/or generates chemicals

known to the state of California

to cause cancer or birth defects
or other reproductive harm.

IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, op­erate or service this replace.
Improper use of this replace
can cause serious injury or
death from burns, re, explo­sion, electrical shock and carbon
monoxide poisoning.

DANGER: Carbon monoxide

poisoning may lead to death!

Carbon Monoxide Poisoning: Early signs of

carbon monoxide poisoning resemble the u,
with headaches, dizziness or nausea. If you
have these signs, the replace may not be

working properly. Get fresh air at once! Have
replace serviced. Some people are more af­fected by carbon monoxide than others. These

include pregnant women, people with heart or
lung disease or anemia, those under the inu-

ence of alcohol and those at high altitudes.
Natural and Propane/LP gases are odorless.

An odor-making agent is added to these gases.

The odor helps you detect 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. It
is your guide to safe and proper operation of

this replace.

WARNING: Any change to

this heater or its controls can

be dangerous.

WARNING: Do not use a

blower insert, heat exchanger
insert or other accessory not ap­proved for use with this heater.

WARNING: Do not allow fans

to blow directly into the replace.
Avoid any drafts that alter burner
ame patterns. Ceiling fans can
create drafts that alter burner
ame patterns. Altered burner
patterns can cause sooting.

Due to high temperatures, the
appliance should be located out
of trafc and away from furniture
and draperies.

Do not place clothing or other
ammable material on or near
the appliance. Never place any
objects on the heater.

Heater base assembly becomes
very hot when running heater.
Keep children and adults away
from hot surface to avoid burns
or clothing ignition. Heater

will remain hot for a time after

shutdown. Allow surface to cool
before touching.

Carefully supervise young chil-

dren when they are in the room

with heater. When using the hand-

held remote accessory (Remote-

Ready Models Only), keep selec­tor switch in the OFF position to
prevent children from turning on
burners with remote.

You must operate this heater
with the replace screen and
hood in place. Make sure re­place screen and hood are in
place before running heater.

Keep the appliance area clear
and free from combustible ma­terials, gasoline and other am­mable vapors and liquids.

122001-01C 3

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SAFETy

Continued

1. This appliance is only for use with the type
of gas indicated on the rating plate. This
appliance is not convertible for use with
other gases.

2. Do not place propane/LP supply tank(s)
inside any structure. Locate propane/LP
supply tank(s) outdoors (propane/LP
units only).

3. If you smell gas

• shut off gas supply

• do not try to light any appliance

• do not touch any electrical switch; do not

use any phone in your building

• immediately call your gas supplier from

a neighbor ’s phone. Follow the gas
supplier’s instructions

• if you cannot reach your gas supplier,

call the re department

4. This heater shall not be installed in a bed-

room or bathroom, unless installed as a

vented appliance. See Installing Damper
Clamp Accessory for Vented Operation,

page 12 (Remote-Ready Models Only).
This gas log set may not be installed as a
vented appliance in a bedroom or bathroom
in the Commonwealth of Massachusetts.

5. Before installing in a solid fuel burning re­place, the chimney ue and rebox must
be cleaned of soot, creosote, ashes and
loose paint by a qualied chimney cleaner.

Creosote will ignite if highly heated. A dirty

chimney ue may create and distribute

soot within the house. Inspect chimney

ue for damage. If damaged, repair ue
and rebox before operating heater.

6. Do not burn solid-fuel in a masonry or

UL127 factory-built replace in which a

vent-free room heater is installed.

7. If replace has glass doors, never operate

this heater with glass doors closed. If you

operate heater with doors closed, heat
buildup inside replace will cause glass to

burst. Make sure there are no obstructions

across openings of replace.

8. To prevent the creation of soot, follow the

instructions in Cleaning and Maintenance,
page 27.

9. Before using furniture polish, wax, carpet
cleaner or similar products, turn heater off. If
heated, the vapors from these products may

create a white powder residue within burner
box or on adjacent walls and furniture.

10. This heater needs fresh, outside air ven­tilation to run properly. This heater has an
Oxygen Depletion Sensing (ODS) safety
shutoff system. The ODS shuts down the
heater if enough fresh air is not available.
See Air for Combustion and Ventilation,

page 6. If heater keeps shutting off, see
Troubleshooting, page 29.

11. Do not run heater

• where ammable liquids or vapors are

used or stored

• under dusty conditions

12. Do not use this heater to cook food or burn
paper or other objects.

13. Do not use heater if any part has been ex­posed to or under water. Immediately call

a qualied service technician to inspect

the room heater and to replace any part
of the control system and any gas control
which has been under water.

14. Do not operate heater if any log is broken.
Do not operate heater if a log is chipped

(dime-sized or larger).

15. Turn heater off and let cool before ser-

vicing, installing or repairing. Make sure

the selector switch is in the OFF position
(Remote-Ready Models Only). Only a

qualied service person should install,

service or repair heater.

16. Make sure the selector switch is in the
OFF position when you are away from
home for long periods of time (Remote­Ready Models Only).

17. Remote-ready heaters must not be con­nected to any external electrical source.

18. Operating heater above elevations of

4,500 feet may cause pilot outage.

19. To prevent performance problems, do not

use propane/LP fuel tank of less than 100
lb. capacity (propane/LP units only).

20. Provide adequate clearances around air
openings.

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122001-01C4

UNPACkING

CAUTION: Do not remove the

data plates from the grate as­sembly. The data plates contain
important warranty and safety
information.

1. Remove logs and heater base assembly
from carton.

PRODUCT IDENTIFICATION

Note: Do not pick up heater base assem-

bly by burners. This could damage heater.
Always handle base assembly by grate.

2. Remove all protective packaging applied
to logs and heater for shipment.

3. Check heater for any shipping damage. If

heater is damaged call DESA Heating, LLC

at 1-866-672-6040 for replacement parts
before returning to dealer.

Log Set

Ignitor

Remote Control
(Optional)

Control
Knob

Flame Adjustment Knob

Figure 1 - Product Identication

LOCAL CODES

Install and use heater with care. Follow all

local codes. In the absence of local codes,

use the latest edition of The National Fuel
Gas Code, ANSI Z223.1/NFPA 54*.

*Available from:

American National Standards Institute, Inc.

1430 Broadway

New York, NY 10018

National Fire Protection Association, Inc.

Batterymarch Park

Quincy, MA 02269

Rear Burner

Base Assembly

State of Massachusetts: The installa­tion must be made by a licensed plumber
or gas fitter in the Commonwealth of
Massachusetts.

Sellers of unvented propane or natural

gas-red supplemental room heaters shall

provide to each purchaser a copy of 527
CMR 30 upon sale of the unit.

Vent-free gas products are prohibited for
bedroom and bathroom installation in the
Commonwealth of Massachusetts.

OPTIONAL REMOTE CONTROL ACCESSORIES

There are four optional remote controls that
can be purchased separately for Remote­Ready Models Only:

• wall switch

•

hand-held ON/OFF remote

•

wall thermostat

• hand-held thermostat remote

122001-01C 5

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See Accessories, page 40.
The wall thermostat or hand-held thermostat

may not be used where vented decorative
listing is required.

PRODUCT FEATURES

OPERATION

This heater is clean burning. It requires no
outside venting. There is no heat loss out a
vent or up a chimney. Heat is generated by

both realistic ames and glowing coals. This

heater is designed for vent-free operation with
ue damper closed. It has been tested and ap­proved to ANSI Z21.11.2 standard for unvented
heaters. State and local codes in some areas
prohibit the use of vent-free heaters. This heater
may also be operated as a vented decorative

(ANSI Z21.60) product by opening the ue

damper (Non-Thermostat Models Only).

AIR FOR COMbUSTION AND VENTILATION

WARNING: 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. Read the
following instructions to insure
proper fresh air for this and
other fuel-burning appliances
in your home.

Today’s homes are built more energy efcient
than ever. New materials, increased insulation

and new construction methods help reduce
heat loss in homes. Home owners weather
strip and caulk around windows and doors
to keep the cold air out and the warm air in.

During heating months, home owners want

their homes as airtight as possible.
While it is good to make your home energy

efcient, your home needs to breathe. Fresh

air must enter your home. 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. This will insure proper
venting of vented fuel-burning appliances.

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SAFETY DEVICE

This heater has a pilot with an Oxygen Deple­tion Sensing (ODS) safety shutoff system. The
ODS/pilot is a required feature for vent-free
room heaters. The ODS/pilot shuts off the
heater if there is not enough fresh air.

ELECTRONIC IGNITION SYSTEM

This heater has an electronic ignitor to light
heater fuel supply.

PROVIDING ADEQUATE
VENTILATION

The following are excerpts from National Fuel
Gas Code, ANSI Z223.1/NFPA 54, 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

The information on pages 6 through 8 will help
you classify your space and provide adequate
ventilation.

Unusually Tight Construction

The air that leaks around doors and windows
may provide enough fresh air for combustion

and ventilation. However, in buildings of un­usually tight construction, you must provide

additional fresh air.

Unusually tight construction is dened as

construction where:

a. walls and ceilings exposed to the out-

side atmosphere have a continuous
water vapor retarder with a rating of
one perm (6 x 10
less with openings gasketed or sealed

and

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 oors, between wall-ceiling joints,
between wall panels, at penetrations
for plumbing, electrical and gas lines
and at other openings.

-11

kg per pa-sec-m2) or

122001-01C6

AIR FOR COMbUSTION AND VENTILATION

Continued

If your home meets all of the three criteria

above, you must provide additional fresh
air. See Ventilation Air From Outdoors,
page 8.

If your home does not meet all of the

three criteria above, proceed to Determin-
ing Fresh-Air Flow For Heater Location,
below.

Conned and Unconned Space

The National Fuel Gas Code, ANSI Z223.1/
NFPA 54 denes a conned space as a space

whose volume is less than 50 cubic feet per

1,000 Btu/hr (4.8 m3 per kw) of the aggregate

input rating of all appliances installed in that

space and an unconned space as a space

whose volume is not less than 50 cubic feet

per 1,000 Btu/hr (4.8 m3 per kw) of the ag-

gregate input rating of all 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 un­conned space.

* Adjoining rooms are communicating only if
there are doorless passageways or ventilation
grills between them.

DETERMINING FRESH-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 install

replace plus any adjoining rooms 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 adjoining room

is supplied with grills or openings, add the

volume of these rooms to the total volume
of the space.

2. Multiply the space volume by 20 to determine
the maximum Btu/Hr the space can support.

________ (volume of space) x 20 = (Maxi-

mum Btu/Hr the space can support)

Example: 2560 cu. ft. (volume of space) x 20

= 51,200 (maximum Btu/Hr the space can

support)

3. Add the Btu/Hr of all fuel burning appliances
in the space.

Vent-free replace __________ Btu/Hr
Gas water heater* __________ Btu/Hr
Gas furnace __________ Btu/Hr
Vented gas heater __________ Btu/Hr
Gas replace logs __________ Btu/Hr
Other gas appliances* + _________Btu/Hr
Total = _________Btu/Hr
* Do not include direct-vent gas appliances.

Direct-vent draws combustion air from the
outdoors and vents to the outdoors.

Example:
Gas water heater __________ Btu/Hr
Vent-free replace + _________Btu/Hr
Total = _________Btu/Hr

4.

Compare the maximum Btu/Hr the space can
support with the actual amount of Btu/Hr used.

_______ Btu/Hr (maximum can support)
_______ Btu/Hr (actual amount used)
Example: 51,200 Btu/Hr (maximum the

73,000 Btu/Hr (actual amount of

The space in the above example is a 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.

B. Vent room directly to the outdoors. See

Ventilation Air From Outdoors, page 8.

C. Install a lower Btu/Hr replace, if lower Btu/Hr

size makes room unconned.

If the actual Btu/Hr used is less than the maxi-

mum Btu/Hr the space can support, the space is
an unconned space. You will need no additional

fresh air ventilation.

space can support)

Btu/Hr used)

40,000
33,000
73,000

122001-01C 7

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AIR FOR COMbUSTION AND VENTILATION

Outlet
Air

Ve ntilated
Attic

Outlet
A

ir

Inlet
Air

Inlet Air

Ve ntilated

Crawl Space

T o

Crawl

Space

T o Attic

Or

Remove
Door into
Adjoining

Room,
Option

3

Ve ntilation Grills

Into Adjoining Room,

Option 2

Ve ntilation

Grills Into
Adjoining

Room,

Option 1

12"

12"

Continued

WARNING: If the area in which

the heater may be operated does

not meet the required volume for

indoor combustion air, combus-

tion and ventilation air shall be

provided by one of the methods

described in the National Fuel

Gas Code, ANSI Z223.1/NFPA 54,

the International Fuel Gas Code,

or applicable local codes.

VENTILATION AIR

Ventilation Air From Inside Building

This fresh air would come from an adjoining

unconned space. When ventilating to an
adjoining unconned space, you must provide

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 2). You can also remove door
into adjoining room (see option 3, Figure 2).

Follow the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, Air for Combustion and
Ventilation for required size of ventilation

grills or ducts.

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation
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. These spaces include attics
and crawl spaces. Follow the National Fuel

Gas Code, ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation for required size

of ventilation grills or ducts.
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 3 - Ventilation Air from Outdoors

Figure 2 - Ventilation Air from Inside Building

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122001-01C8

INSTALLATION

NOTICE: This heater is intended

for use as supplemental heat.

Use this heater along with your

primary heating system. Do not

install this heater as your pri-

mary heat source. If you have a

central heating system, you may

run system’s circulating blower

while using heater. This will help

circulate the heat throughout the

house. In the event of a power

outage, you can use this heater

as your primary heat source.

WARNING: A qualied ser-

vice person must install heater.

Follow all local codes.

NOTICE: State or local codes may

only allow operation of this appli-

ance in a vented conguration.

Check your state or local codes.

WARNING: Make sure the

selector switch is in the OFF

position before installing heater

(Remote-Ready Models Only).

WARNING: Before installing
in a solid fuel burning replace,
the chimney ue and rebox
must be cleaned of soot, creo­sote, ashes and loose paint by
a qualified chimney cleaner.
Creosote will ignite if highly
heated. A dirty chimney ue may
create and distribute soot within
the house. Inspect chimney and
rebox ue for damage. If dam­aged, repair ue and rebox
before operating heater.

WARNING: Seal any fresh

air vents or ash clean-out doors

located on oor or wall of re­place. If not, drafting may cause
pilot outage or sooting. Use a
heat-resistant sealant. Do not
seal chimney ue damper.

WARNING: Never install the

heater

• in a bedroom or bathroom

unless installed as a vented
appliance, see page 12 (Re­mote-Ready Models Only)

• in a recreational vehicle

• where curtains, furniture,
clothing or other ammable
objects are less than 36" from
the front and 42" from top

heater, For side clearances

see Figure 4 page 10

• in high trafc areas

• in windy or drafty areas

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 (such as, but
not limited to, tobacco smoke,
aromatic candles, cleaning u­ids, oil or kerosene lamps, etc.) in

the air exist, may discolor walls

or cause odors.

IMPORTANT: Vent-free heaters add moisture

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 Combustion and Ventila-

tion, page 6.

122001-01C 9

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INSTALLATION

Continued

CHECK GAS TYPE

Use the correct type of gas (natural or propane/
LP). If your gas supply is not the correct gas

type, do not install heater. Call dealer where

you bought heater for proper type heater.

WARNING: This appliance is
equipped for either natural gas
or propane/LP gas but not both.
Gas type is indicated on the rat­ing plate. Field conversion is not
permitted.

INSTALLATION AND CLEARANCES
FOR VENT-FREE OPERATION

WARNING: Maintain the

minimum clearances. If you
can, provide greater clearances
from oor, ceiling and adjoining
wall.

Minimum Fireplace Clearance to

Combustible Materials

Side Wall 16", Ceiling 42", Floor 5",

Front 36"

Example: The face of a mantel, bookshelf,

etc. is made of combustible material and
protrudes 3 1/2" from the wall. This com­bustible material must be 4" from the side

of the replace cabinet (see Figure 4).

Note: When installing your gas logs into

a manufactured rebox, follow rebox

manufacturer’s instructions for minimum
clearances to combustible materials.

B. Clearances from the top of the replace

opening to the ceiling should not be less
than 42".

NOTICE: Manual control heaters

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, noncombustible material
above replace opening is not
needed. Go to Installing Damper

Clamp Accessory for Vented
Operation, page 12.

LOG SIZING REQUIREMENTS

Minimum Firebox Size

Log

Height Depth

Size

18" 17" 14" 20" 14"
24" 17" 14" 26" 18"
30" 21" 14" 32" 22"
36" 21" 14" 38" 27 1/2"

*Measured at 14" depth

Carefully follow these instructions. This will

ens ur e safe inst al lation into a masonry,
UL127-listed manufactured replace or listed
vent-free rebox.

Minimum Clearances For Side

Combustible Material, Side Wall and
Ceiling

A. Clearances from the side of the replace

cabinet to any combustible material and
wall should follow diagram in Figure 4.

Front

Width

Rear

Width*

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Example

*

*Minimum 16" from Side Wall

Figure 4 - Minimum Clearance for

Combustible to Wall

122001-01C10

INSTALLATION

Heat Resistant
Material

(A)

Minimum
Noncombustible
Material

Minimum
Noncombustible
Material Height

Distances to
Underside of
Mantel

Top of
Fireplace
Opening

Underside of
Mantel Shelf

12"

8"

(A)

18"

14"

20"

17"

22"

19"

24"

20"

All minimum
distances are
in inches

Log Set
24"/30"/36"
Models
18" Model

2 1/2"

6"

8"

10"

Mantel Shelf

Continued

MINIMUM NONCOMbUSTIbLE
MATERIAL CLEARANCES

If Not Using Mantel

Note: If using a mantel proceed to If Using
Mantel. If not using a mantel, follow the infor­mation on this page.

You must have noncombustible material(s)

above the replace opening. Noncombus­tible materials (such as slate, marble, tile,

etc.) must be at least 1/2" thick. With sheet
metal, you must have noncombustible ma­terial behind it. Noncombustible material
must extend at least 8" up (for all models).

If noncombustible material is less than 12",
you must install the replace hood accessory

(24" and 30" Models Only). See Figure 5 for
minimum clearances.

Noncombustible

Material

Distance (A)

1

2" or more Noncombustible mate-

Between 8" and 12"

Less than 8"

Requirements for Safe

Installation

rial OK.

24", 30" or 36" Models:
Install replace hood
accessory (GA6050,

GA6052 or GA6053 see

Accessories, page 40).

18" Model: Noncom­bustible material OK.
Noncombustible mate­rial must be extended
to at least 8". See

Between 8" and 12",

above. If you cannot ex-

tend material, you must
operate heater with ue

damper open.

If Using Mantel

You must have noncombustible material(s)

above the replace opening. Noncombustible
materials (such as slate, marble, tile, etc.)
must be at least 1/2" thick. With sheet metal,

you must have noncombustible material be­hind it. Noncombustible material must extend
at least 8" up (for all models). If noncombus-

tible material is less than 12", you must install
the replace hood accessory (24" and 30"

Models Only). Even if noncombustible mate-

rial is more than 12", you may need the hood
accessory to deect heat away from your

mantel shelf. See Figures 5 and 6 and Figure

7, page 9, for minimum clearances.

IMPORTANT: If you cannot meet these mini-

mum clearances, you must operate heater
with chimney ue damper open. Go to Install-

ing Damper Clamp Accessory for Vented
Operation, page 12.

MANTEL CLEARANCES

In addition to meeting noncombustible mate-

rial clearances, you must also meet required
clearances between replace 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 6).

Figure 5 - Heat Resistant Material (Slate,

122001-01C 11

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Marble, Tile, etc.) Above Fireplace

Figure 6 - Minimum Mantel Clearances

Without Using Hood

14"
Min.

Combustible
Material

Noncombustible Material

Hearth

5"
Min.

Combustible
Material

Minimum
Noncombustible
Material

8"
Min.

12" 15" 18"

All minimum
distances are
in inches

Log Sets
18", 24",
30" & 36"
Models

20"

2

1

/2

"

6"

8"

10"

12"

Distances to
Underside of
Mantel

Hood
(GA6050,
GA6052,
or GA6053)

Top of
Fireplace
Opening

Underside of
Mantel Shelf

Mantel Shelf

INSTALLATION

Continued

Determining Minimum Mantel Clearance
When Using a Hood

If minimum clearances in Figure 6, page 11, are
not met, you must have a hood. When using

a hood there are still certain minimum mantel
clearances required. Follow minimum clear-

ances shown in Figure 7, when using hood.

NOTICE: Surface temperatures
of adjacent walls and mantels
become hot during operation.
Walls and mantels above the
firebox may become hot to
the touch. If installed properly,
these temperatures meet the
requirement of the national
product standard. Follow all

minimum clearances shown in

this manual.

NOTICE: If your installation does
not meet the minimum clear­ances shown, you must do one

of the following:

• operate the logs only with the

ue damper open

• raise the mantel to an accept-

able height

• remove the mantel

Figure 7 - Minimum Mantel Clearances

When Using Hood

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FLOOR CLEARANCES

A. If installing appliance on the oor level,

you must maintain the minimum distance
of 14" to combustibles (see Figure 8).

B. If combustible materials are less than 14"

to the replace, you must install appliance
at least 5" above the combustible ooring

(see Figure 9).

Figure 8 - Minimum Fireplace Clearances

If Installed at Floor Level

Figure 9 - Minimum Fireplace Clearances

Above Combustible Flooring

INSTALLING DAMPER CLAMP
ACCESSORY FOR VENTED
OPERATION

Note: When used as a vented heater, ap­pliance must be installed only in a solid-fuel
burning fireplace with a working flue and
constructed of noncombustible material.

For Massachusetts Residents Only: Instal­lation of this gas log set as a vented appliance
in the Commonwealth of Massachusetts re­quires the damper be permanently removed
or welded in the fully open position.

If your heater is a manually-controlled model,

you may use this heater as a vented product.
There are three reasons for operating your
heater in the vented mode.

1. The replace does not meet the clearance

to combustibles requirements for vent­free operation.

122001-01C12

INSTALLATION

Continued

2. State or local codes do not permit vent­free operation.

3. You prefer vented operation.

If reasons number 1 or 2 apply to you, you
must permanently open chimney ue damper.

You must install the damper clamp accessory

(to order, see Accessories, page 40). This

will insure vented operation (see Figure 10).
The damper clamp will keep damper open.
Installation instructions are included with
clamp accessory.

See chart below for minimum permanent ue

opening you must provide. Attach damper
clamp so the minimum permanent ue open­ing will be maintained at all times.

Area of Various Standard Round Flues

Diameter Area

5" 20 sq. inches
6" 29 sq. inches
7" 39 sq. inches
8" 51 sq. inches

Chimney Height

6' to 15' 39 sq. inches

15' to 30' 29 sq. inches

Damper
Clamp

Damper

Masonry Fireplace

Figure 10 - Attaching Damper Clamp

122001-01C 13

Minimum Permanent

Flue Opening

Damper

Damper
Clamp

Damper

Manufactured Fireplace

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INSTALLING HEATER bASE
ASSEMbLY

WARNING: You must secure

this heater to replace oor. If

not, heater will move when you

adjust controls. Moving heater
may cause a gas leak.

WARNING: If installing in a
sunken replace, special care
is needed. You must raise the
replace oor to allow access
to heater control panel. This
will insure adequate air ow
and guard against sooting and
controls being damaged. Raise
replace oor with noncombus­tible material. Make sure material
is secure.

CAUTION: Do not pick up
heater base assembly by burn­ers. This could damage heater.
Only handle base assembly by
grates.

IMPORTANT: Make sure the heater burners

are level. If heater is not level, heater will not
work properly. For thermostat models, avoid

damage to thermostat bulb. Avoid nicks or
sharp bends in thermostat bulb wire. Keep
thermostat bulb in mounting bracket until

ready to mount base to oor. See Optional
Positioning Of Thermostat Sensing Bulb,

page 33.

Installation Items Needed

• hardware package (provided with heater)

• approved exible gas hose and ttings (not

provided) (if allowed by local codes)

• sealant (resistant to propane/LP gas, not

provided)

• electric drill with 3/16” masonry drill bit

Note: Install optional Receiver and Hand-Held
Remote Control Kit (see Accessories, page

40) before installing gas log heater (Remote­Ready Models Only). See installation instruc­tions included with the kit.

INSTALLATION

Continued

1. Apply pipe joint sealant lightly to male
threads of gas fitting (provided). For
Thermostatically-Controlled Models con-

nect approved exible gas hose to gas

regulator of heater (see Figure 11). For
Remote-Ready models connect approved
exible gas hose to inlet side of gas con­trol (see Figure 12).

IMPORTANT: Hold gas regulator with

wrench when connecting flexible gas
hose (Thermostatically-Controlled Models
Only).

2. Po s i t i o n he a t e r base as s e m b l y in
fireplace.

3. Mark screw locations through holes in
front panel of base (see Figure 13). If

installing in a brick-bottom replace, mark

screw locations in mortar joint of bricks.

4. Remove heater base from replace.

5. Drill holes at marked locations using 3/16"
drill bit.

6. Attach base, through holes in front panel
of base, to replace oor using masonry

screws provided in hardware package
(see Figure 13).

7. Connect to gas supply. See Connecting
To Gas Supply.

Heater Gas
Regulator

Flexible Gas Hose (if
allowed by local codes)

Figure 11 - Attaching Flexible Gas Hose to

Heater Gas Regulator (Thermostatically-

Controlled Models Only)

Gas Control

Masonry

Screw

Figure 13 - Attaching Base to Fireplace

Floor (Remote-Ready Models Only)

CONNECTING TO GAS SUPPLY

WARNING: This appliance
requires a 1/2" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.

WARNING: A qualied ser­vice person must connect heater
to gas supply. Follow all local
codes.

CAUTION: Never connect

propane/LP replace directly
to the propane/LP supply. This
heater requires an external regu­lator (not supplied). Install the
external regulator between the
heater and propane/LP supply.

Flexible Gas Hose
(if allowed by local
codes)

Figure 12 - Attaching Flexible Gas Hose

to Heater Gas Regulator

(Remote-Ready Models Only)

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WARNING: Never connect

natural gas replace to private
(non-utility) gas wells. This
gas is commonly known as
wellhead gas.

122001-01C14