Heat & Glo MTL-INSERT User manual

1Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/09
Model:
MTL-Insert
• Do not store or use gasoline or other flam-
mable 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 suppli-
er’s instructions.
- If you cannot reach your gas supplier, call
the fire department.
• Installation and service must be performed
bya qualifiedinstaller,serviceagency,orthe
gas supplier.
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury, or death.
Owner’s Manual
Installation and Operation
DO NOT DISCARD THIS MANUAL
CAUTION
This appliance may be installed as an OEM installation in
manufactured home (USA only) or mobile home and must be
installedinaccordancewiththemanufacturer’sinstructionsand
themanufactured home construction and safety standard,Title
24CFR,Part3280orStandardforInstallationinMobileHomes,
CAN/CSA Z240MH.
This appliance is only for use with the type(s) of gas indicated
on the rating plate.
• Leave this manual with
party responsible for use
and operation.
DO NOT
DISCARD
• Important operating
and maintenance
instructions included.
• Read,understandandfollow
these instructions for safe
installation and operation.
In the Commonwealth of Massachusetts:
• installation must be performed by a licensed plumber
or gas fitter;
• a CO detector shall be installed in the room where the
appliance is installed.
Installation and service of this appliance should be
performed by qualified personnel. Hearth & Home
Technologies suggests NFI certified or factory trained
professionals, or technicians supervised by an NFI
certified professional.
WARNING
This appliance has been supplied with an integral barrier
to prevent direct contact with the fixed glass panel. DO
NOT operate the appliance with the barrier removed.
Contact your dealer or Hearth & Home Technologies if the
barrier is not present or help is needed to properly install one.
HOT SURFACES!
Glassandothersurfacesarehotduring
operation AND cool down.
Hot glass will cause burns.
• DO NOT touch glass until it is cooled
• NEVER allow children to touch glass
• Keep children away
• CAREFULLY SUPERVISE children in same room as
fireplace.
• Alert children and adults to hazards of high temperatures.
High temperatures may ignite clothing or other flammable
materials.
• Keep clothing, furniture, draperies and other flammable
materials away.

Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/092
Congratulations
Listing Label Information/Location
Model Name:___________________________________________ Date purchased/installed:__________________
Serial Number:__________________________________________ Location on appliance: ____________________
Dealership purchased from: _______________________________ Dealer Phone: __________________________
Notes: _______________________________________________________________________________________
_____________________________________________________________________________________________
Congratulations on selecting a Heat & Glo gas appliance
—an elegant and clean alternative to wood burning
appliances. The Heat & Glo gas appliance you have
selected is designed to provide the utmost in safety,
reliability, and efficiency.
As the owner of a new appliance, you’ll want to read and
carefully follow all of the instructions contained in this
Owner’s Manual. Pay special attention to all Cautions and
Warnings.
This Owner’s Manual should be retained for future
reference. We suggest that you keep it with your other
important documents and product manuals.
The information contained in this Owner’s Manual, unless
noted otherwise, applies to all models and gas control
systems.
Your new Heat & Glo gas appliance will give you years of
durable use and trouble-free enjoyment. Welcome to the
Heat & Glo family of appliance products!
Read this manual before installing or operating this appliance.
Please retain this owner’s manual for future reference.
We recommend that you record the following pertinent
information about your appliance.
Gas and Electric
Information
Serial Number
Type of Gas
The model information regarding your specific appliance can be found on
the rating plate usually located in the control area of the appliance.
Homeowner Reference Information
Model Number
Heat & Glo, a of Hearth & Home Technologies, Inc.
7571 215th Street West, Lakeville, MN 55044
brand
Not for use with solid fuel.
(Ne doit pas entre utilise avec un combustible solide).
This appliance must beinstalled in accordance with local codes, if any;if not, follow ANSI Z223.1
intheUSAorCAN/CGA B149installation codes.(Installerl’appareilselonlescodesoureglements
locaux ou,en l’absence de tels reglements, selon les codes d’installation CAN/CGA-B149.)
Type of Gas (Sorte De Gaz):
NATURAL GAS
MADE IN USA
Minimum Permissible Gas Supply for Purposes of Input Adjustment.
ApprovedMinimum(DeGaz)Acceptable0.0in w.c. (Po.Col.d’eau)
MaximumPressure (Pression) 0.0in w.c. (Po.Col.d’eau)
MaximumManifoldPressure(Pression) 0.0in w.c. (Po.Col.d’eau)
MinimumManifoldPressure(Pression) 0.0in w.c. (Po.Col.d’eau)
Model:
(Modele):
Serial
(Serie):
ANSI Z21XX-XXXX · CSA 2.XX-MXX · UL307B
XXXXXXXX
INCANADA
ALTITUDE:0-0000 FT.0000-0000FT.
MAX.INPUTBTUH: 00,000 00,000
MIN.INPUT BTUH: 00,000 00,000
ORIFICESIZE: #XXXXX #XXXXX XXXXXXXX
Total Electrical Requirements: 000Vac, 00Hz., less than 00 Amperes
This product may be covered by one or more of the following patents: (Nos produits sont couverts par un ou plusieurs des brevets suivants): (United States)
4593510, 4686807, 4766876, 4793322, 4811534, 5000162, 5016609, 5076254, 5113843,5191877, 5218953, 5263471, 5328356, 5341794, 5347983, 5429495,
5452708,5542407, 5601073, 5613487,5647340, 5688568,5762062,5775408, 5890485, 5931661, 5941237,5947112,5996575,6006743, 6019099, 6048195,
6053165, 6145502, 6170481, 6237588, 6296474, 6374822, 6413079, 6439226, 6484712, 6543698, 6550687, 6601579, 6672860, 6688302B2, 6715724B2,
6729551, 6736133, 6748940, 6748942, D320652, D445174, D462436; (Canada)1297749, 2195264, 2225408; or other U.S. and foreign patents pending (ou
autresbrevetsamericains etetrangers enattente).
Î

3Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/09
Table of Contents
1 Listing and Code Approvals
A. Appliance Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
B. BTU Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
C. HighAltitude Installations. . . . . . . . . . . . . . . . . . . . . . . . . . 4
D. Non-Combustible Materials Specification. . . . . . . . . . . . . . 4
E. Combustible Materials Specification . . . . . . . . . . . . . . . . . 4
F. Electrical Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Getting Started
A. Design and Installation Considerations . . . . . . . . . . . . . . . 5
B. Tools and Supplies Needed . . . . . . . . . . . . . . . . . . . . . . . . 5
C. InspectAppliance and Components. . . . . . . . . . . . . . . . . . 5
3 Fireplace Size Requirements
A. Minimum Fireplace Opening . . . . . . . . . . . . . . . . . . . . . . . 6
B. Clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Termination Locations
A. Vent Termination Minimum Clearances . . . . . . . . . . . . . . . 8
5 Vent Information and Diagrams
A. Vent Table Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
B. Horizontal Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
C. Measuring Standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Installation Preparation
A. Flue Damper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
B. Chimney. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
C. Gas Line. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
D. Hearth or Hearth Extension . . . . . . . . . . . . . . . . . . . . . . . 10
E. Fireplace Conversion Notice . . . . . . . . . . . . . . . . . . . . . . 10
F. Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7 Installing Vent Pipe and Appliance
A. Venting Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
B. Connecting Vent Pipe. . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
C. Placing, Securing and Leveling theAppliance . . . . . . . . . 12
D. Installing Termination Cap . . . . . . . . . . . . . . . . . . . . . . . . 13
8 Gas Information
A. Fuel Conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
B. Gas Pressures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
C. Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
9 Electrical Information
A. Wiring the Appliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
B. Optional Junction Box Installation . . . . . . . . . . . . . . . . . . 17
10 Finishing
A. Mantel Projections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
11 Appliance Setup
A. Remove Shipping Materials . . . . . . . . . . . . . . . . . . . . . . . 20
B. Clean the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
C. Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
D. Ember Placement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
E. Positioning the Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
F. Glass Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
G. Air Shutter Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
12 Operating Instructions
A. Before Lighting Appliance. . . . . . . . . . . . . . . . . . . . . . . . . 25
B. Lighting Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
C. Check Pilot FlameAppearance . . . . . . . . . . . . . . . . . . . . 27
D. AfterAppliance is Lit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
E. Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . 28
13 Troubleshooting
A. Standing Pilot Ignition System . . . . . . . . . . . . . . . . . . . . . 29
14 Maintaining and Servicing Appliance
A. Maintenance Tasks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
15 Reference Materials
A. Appliance Dimension Diagram. . . . . . . . . . . . . . . . . . . . . 33
B. Vent Kits Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
C. Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
D. Limited Lifetime Warranty. . . . . . . . . . . . . . . . . . . . . . . . . 38
E. Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Î= Contains updated information.
Î
Î

Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/094
Note: To assure top performance, safety and efficiency,
inserts must be installed with an approved flue liner as per
CAN/CGAB-149 orNational FuelGas CodeANSI Z223 and
these instructions.
Note: This installation must conform with local codes. In the
absence of local codes you must comply with the National
Fuel Gas Code, ANSI Z223.1-latest edition in the U.S.A. and
the CAN/CGA B149 Installation Codes in Canada.
1
1 Listing and Code Approvals
C. High Altitude Installations
U.L. Listed gas appliances are tested and approved with-
out requiring changes for elevations from 0 to 2000 feet
in the U.S.A. and Canada.
When installing this appliance at an elevation above
2000 feet, it may be necessary to decrease the input rat-
ing by changing the existing burner orifice to a smaller
size. Input rate should be reduced by 4% for each 1000
feet above a 2000 foot elevation in the U.S.A., or 10% for
elevations between 2000 and 4500 feet in Canada. If the
heating value of the gas has been reduced, these rules
do not apply. To identify the proper orifice size, check
with the local gas utility.
If installing this appliance at an elevation above 4500 feet
(in Canada), check with local authorities.
B. BTU Specifications
MODELS: MTL-INSERT
LABORATORY: Underwriters Laboratories, Inc. (UL)
TYPE: Vented Gas Fireplace Heaters
STANDARD: ANSI Z21.88a-2007/CSA 2.33a-2007
ANSI Z21.88-2005/CSA 2.33-2005
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.
This product is listed to ANSI standards for “Vented Gas
Appliance Heaters” and applicable sections of “Gas Burn-
ing Heating Appliances for Manufactured Homes and
Recreational Vehicles”, and “Gas Fired Appliances for
Use at High Altitudes”.
Models
(U.S. or Canada)
Maximum
Input
BTU/h
Minimum
Input
BTU/h
Orifice
Size
(DMS)
MTL-INSERT
(NG)
US
(0-2000 FT.) 32,000 22,000 #35
CANADA
(2000-4500 FT.) 28,800 19,800 #36
MTL-INSERT
(LP)
US
(0-2000 FT.) 31,000 18,000 #52
CANADA
(2000-4500 FT.) 27,900 16,220 #53
A. Appliance Certification
D. Non-Combustible Materials Specification
Material which will not ignite and burn. Such materials are
those consisting entirely of steel, iron, brick, tile, concrete,
slate, glass or plasters, or any combination thereof.
Materials that are reported as passing ASTM E 136,
Standard Test Method for Behavior of Materials in a
Vertical Tube Furnace at 750º C, shall be considered
non-combustible materials.
E. Combustible Materials Specification
Materials made of or surfaced with wood, compressed
paper, plant fibers, plastics, or other material that can ig-
nite and burn, whether flame proofed or not, or whether
plastered or unplastered shall be considered combustible
materials.
F. Electrical Codes
NOTICE: This appliance must be electrically wired and
groundedin accordancewith localcodes or,in theabsence
of local codes, with National Electric Code ANSI/NFPA
70-latest edition or the Canadian Electric Code CSA
C22.1.
• A 110-120 VAC circuit for this product must be protected
withground-faultcircuit-interrupterprotection,incompliance
with the applicable electrical codes, when it is installed in
locations such as in bathrooms or near sinks.
WARNING
NOT INTENDED FOR USEASAPRIMARY HEAT SOURCE.
This appliance is tested and approved as either supplemen-
tal room heat or as a decorative appliance. It should not be
factored as primary heat in residential heating calculations.

5Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/09
Heat & Glo gas inserts are designed for recessed installa-
tionsinto solidfuelmasonry orfactorybuiltnon-combustible
fireplaces that have been installed in accordance with the
National, Provincial, State and local building codes.
Prior to installing the gas insert:
• Have the chimney and adjacent structure inspected
and cleaned by qualified professionals. Hearth & Home
Technologies recommends that NFI or CSIA certified
professionals,or techniciansunderthe directionof certi-
fied professionals, conduct a minimum of a NFPA 211
Level 2 inspection of the chimney.
• Replace component parts of the chimney and fireplace
as specified by the professionals.
• Ensure all joints are properly engaged and the chimney
is properly secured.
When planning an appliance installation, it’s necessary to
determine the following information before installing:
• Minimum fireplace size. See Section 3.A.
• Gas supply piping.
• Electrical wiring.
• Finishing details.
• Existing mantel, mantel legs and wall projection loca-
tions. See Section 3.C.
• Whether optional accessories—devices such as a fan,
wall switch, or remote control—are desired.
B. Tools and Supplies Needed
Before beginning the installation be sure that the following
tools and building supplies are available.
Pliers Hi temp caulking material
Hammer Flat blade screwdriver
Voltmeter Framing square
Gloves Variable speed drill
1/4 Hex drive Safety glasses
Manometer Phillips screwdriver
Tape measure Non-corrosive leak check solution
1/2 - 3/4 inch length, #6 or #8 Self-drilling screws
Check building codes prior to installation.
• Installation MUST comply with local, regional, state and
national codes and regulations.
• Consult insurance carrier, local building, fire officials or
authoritieshavingjurisdictionaboutrestrictions, installation
inspection, and permits.
A. Design and Installation Considerations
Heat & Glo direct vent gas appliances are designed to
operate with all combustion air siphoned from outside of
the building and all exhaust gases expelled to the outside.
No additional outside air source is required.
2
2 Getting Started
C. Inspect Appliance and Components
• Carefully remove the appliance and components from
the packaging.
• The vent system components, surrounds and fronts are
shipped in separate packages.
• The fiber logs may be packaged separately and must
be field installed.
• Report to your dealer any parts damaged in shipment,
particularly the condition of the glass.
• Read all of the instructions before starting the insta-
llation. Follow these instructions carefully during the
installation to ensure maximum safety and benefit.
CAUTION
Keep appliance dry.
• Mold or rust may cause odors.
• Water may damage controls.
Inspectapplianceandcomponentsfordamage.
Damaged parts may impair safe operation.
• Do NOT install damaged components.
• Do NOT install incomplete components.
• Do NOT install substitute components.
Report damaged parts to dealer.
Hearth & Home Technologies disclaims any
responsibilityfor, and the warranty will be voided
by, the following actions:
• Installation and use of any damaged appliance or vent
system component.
• Modification of the appliance or vent system.
• Installation other than as instructed by Hearth & Home
Technologies.
• Improper positioning of the gas logs or the glass door.
• Installationand/oruse of any component partnotapproved
by Hearth & Home Technologies.
Any such action may cause a fire hazard.
WARNING
WARNING
WARNING

Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/096
TOP VIEW
A
C
B
3
3 Fireplace Size Requirements
Figure 3.1 Fireplace Opening
NOTE: For actual appliance dimensions refer to Section 15.
Minimum Appliance Size
Location MTL-INSERT
Inches Millimeters
A Front Width 29-1/4 743
B Rear Width 20-1/4 515
C Depth 13-5/8 346
* Height 20-1/4 515
* NOTE: If exhaust collar on insert and fireplace damper do not line up, add 4
inches (102 mm) to minimum fireplace height for bends in vent pipe.
A. Minimum Fireplace Opening
Minimum fireplace opening requirements are shown in
Figure 5.1.
WARNING! Risk of Fire or Burns! Provide adequate
clearance around air openings and for service access.
Due to high temperatures, the appliance should be locat-
ed out of traffic and away from furniture and draperies.
• Thefirebrick(refractory),glassdoors,screenrails,screen
mesh and log grates can be removed from a factory
built firebox in order to gain minimum gas insert opening
requirements.
• Anysmoke shelves,shields andbafflesmaybe removed
from the factory built firebox if attached with mechanical
fasteners.
• Themetalfloorofthe solidfuelfireboxmay beremovedto
facilitatethe installationofthe insert. Theappliance may
notbe placeddirectly onthe baseof theouter wrap,a1/4
inch airspace must be provided between the insert and
thefloor oftheouter wrap. Usethe levellinglegsto raise
the insert a minimum of 1/4 inch. The original fireplace
may never be returned to solid fuel in this condition.
The sidewalls and top structure of the firebox may not
be altered with the exception of removable baffles and
dampers.
• Cutting of any sheet metal parts of the fireplace in which
the gas fireplace insert is to be installed is prohibited,
except the floor as tested for and as noted above.

7Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/09
B. Clearances
Figure 3.2 Clearances to Mantels or other Combustibles
above Appliance
Fire Risk.
• Locate and install appliance to all clearance
specifications in manual.
Fire Risk.
Odor Risk.
• Clearancetocombustiblematerial under the
insert is 1/4 inch (0.6 cm).
• Use leveling legs to raise insert minimum
1/4inchabove combustible material or outer
wrap of factory built firebox.
MEASUREMENTS FROM
TOP EDGE OF UNIT
15 in. MIN.
12 in. MAX.
MANTEL
EXHAUST
VENT PIPE
INLET AIR
VENT PIPE
WARNING
WARNING

Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/098
Fire Risk.
Asphyxiation Risk.
• Terminations MUST meet minimum clearances.
• Exhaust gases are hot.
• Nearby vents may draw fumes into house.
A. Vent Termination Minimum Clearances
Figure 4.1 specifies minimum vent heights for various
pitched roofs.
Roof Pitch H (Min.) Ft.
Flat to 6/12...........................................................1.0*
Over 6/12 to 7/12.................................................1.25*
Over 7/12 to 8/12.................................................1.5*
Over 8/12 to 9/12.................................................2.0*
Over 9/12 to 10/12...............................................2.5*
Over 10/12 to 11/12.............................................3.25
Over 11/12 to 12/12.............................................4.0
Over 12/12 to 14/12.............................................5.0
Over 14/12 to 16/12.............................................6.0
Over 16/12 to 18/12.............................................7.0
Over 18/12 to 20/12.............................................7.5
Over 20/12 to 21/12.............................................8.0
Figure 4.1 Minimum height from roof to lowest discharge
opening
4
4 Termination Locations
* 3 foot minimum in snow regions
WARNING
HORIZONTAL
OVERHANG
VERTICAL
WALL
GAS DIRECT VENT
TERMINATION CAP
12
X
ROOF PITCH
IS X/ 12
LOWEST
DISCHARGE
OPENING
2 FT.
MIN.
20 INCHES MIN.
H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING

9Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/09
CAUTION
ALL vent specifications MUST be followed.
• This product is tested and listed to these specifications.
• Appliance performance will suffer if specifications are not
followed.
EXHAUST VENT PIPE
TERMINATION CAP
ADAPTOR
INSULATION SEAL
INLET VENT AIR PIPE
MIN. = 14FT.
MAX. = 50FT.
Figure 5.1
C. Measuring Standards
Vertical measurements listed in the vent diagram (Figure
5.1) were made using the following standard:
• Vertical terminations are measured to top of chimney.
Fire Hazard.
Explosion Risk.
Asphyxiation Risk.
Do NOT connect this gas appliance to a
chimney flue serving a separate solid fuel or
gas burning appliance.
• May impair safe operation of this appliance
or other appliances connected to the flue.
• Vent this appliance directly outside.
• Use separate vent system for this appliance.
B. Horizontal Venting
Horizontal venting is NOT allowed.
5
5 Vent Information and Diagrams
A. Vent Table Key
The abbreviations listed in this vent table key are used in
the vent diagrams.
Symbol Description
VMIN Minimum Vertical Run Length 14 ft.
VMAX Maximum Vertical Run Length 50 ft.
WARNING

Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/0910
6
6 Installation Preparation
Fire Risk.
A hearth or hearth extension (if present) must
comply with either of the following:
• Thesolidfuelburning fireplace manufacturer’s
specification.
• Local building codes required by authority
having jurisdiction.
• NFPA 211
Prepare the existing solid fuel masonry or factory built
non-combustible firebox for installation.
A. Flue Damper
Fully lock the solid fuel fireplace’s flue damper in the open
position, OR completely remove it.
B. Chimney
• Ensure chimney is constructed of non-combustible
materials.
• Ensure chimney is clean and in good working order.
• Ensure that all chimney cleanouts fit properly to prevent
air leakage into chimney.
C. Gas Line
D. Hearth or Hearth Extension
E. Fireplace Conversion Notice
Permanently attach the label with the following warning
to the inside lower back of the fireplace firebox into which
the insert is being installed. Silicone may be required to
properly secure the label.
Fire Risk.
This fireplace has been converted for use with
a gas fireplace insert only and cannot be used
forburningwood or solid fuelsunlessalloriginal
partshavebeen replaced, and the fireplacere-
approved by the authority having jurisdiction.
F. Remote Control
The receiver for the remotes must be installed BETWEEN
the base pan of the insert and the firebox of the wood-
burning fireplace (see photo below).
Note: If the factory built fireplace has no gas access hole
provided, an access hole of 1 inch (25 mm) diameter or
less may be drilled through the lower sides or bottom of the
firebox in a proper workmanship - like manner. This access
holemustbe plugged with non-combustibleinsulationafter
the gas supply line has been installed.
• Install gas line into firebox cavity.
• Check local codes and gas line sizing requirements
following NFPA54. See Section 8.
Prior to installing the gas insert:
• Have the chimney and adjacent structure inspected
and cleaned by qualified professionals. Hearth & Home
Technologies recommends that NFI or CSIA certified
professionals,or techniciansunder thedirectionofcerti-
fied professionals, conduct a minimum of a NFPA 211
Level 2 inspection of the chimney.
• Replace component parts of the chimney and fireplace
as specified by the professionals.
• Ensure all joints are properly engaged and the chimney
is properly secured.
EXISTING BOTTOM OF
FIREPLACE
REMOTE
RECEIVER
UNIT
EXISTING SIDE
REFRACTORY
WARNING
WARNING
Note:TheMTL-INSERTdoes not shipstandardwithajunction
box. In order to use a remote control, a junction box must be
installed.
Figure 6.1

11Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/09
A. Venting Components
7
7 Installing Vent Pipe and Appliance
Thevertical venttermination systeminstalled onthis model
includes:
• One length of 3-inch flexible vent pipe for combustion
air (included with vent kit). Pipe will be either a 4-foot
or 30-foot section depending on which kit is being used
in the application.
• Flexible vent pipe for exhaust air (included with vent kit).
• One pipe-to-cap adaptor (included with vent kit).
• One vertical termination cap (included with vent kit).
EXHAUST
AIR
VENT PIPE
TERMINATION
CAP
EXHAUST STARTING COLLAR
STARTING COLLAR BRACKET
EXHAUST STARTING COLLAR
INLET AIR STARTING COLLAR
STARTING COLLAR BRACKET
INLET AIR STARTING COLLAR
LOCKING TAB
INLET AIR
VENT PIPE
Figure 7.1
B. Connecting Vent Pipe
Reference instructions in the termination kit.
• Install the 3-inch flexible vent pipe(s) down through the
chimney.
• Use three screws to secure the exhaust flexible vent
pipeto the3foot sectionstainless steelflexiblevent pipe
using the factory-installed 3-inch collar in the stainless
steel section of pipe (see Figure 7.1).
• Use 3 screws to attach either a 4 foot or 30 foot section
of inlet air vent to the inlet collar on the collar slide plate
(see Figure 7.1). NOTE: The collar slide plate may be
removed from appliance to aid installation.
• Seal opening between flex vent and chimney just above
insert. Non-combustible, unfaced fiberglass insulation
may be used for this purpose.
CAUTION
Sharp Edges
• Wearprotective gloves and safety
glasses during installation.

Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/0912
Figure 7.2
CUT AND BEND
FLASHING AS NEEDED
TO FIT CHIMNEY
SEALANT
ADHESIVE
• Trim chimney top plate to minimize excess overhang or
bend over flue tile (see Figure 7.2).
• Place 3/8 inch bead of 300º F silicone on flue tile top.
C. Placing, Securing and Leveling the
Appliance
• Install insert (without surround attached) into existing
fireplace while pulling collar slide plate forward.
• Install gas line into hole provided on insert side.
• If applicable install remote control wires into insert side
(see Section 6F).
• Secure collar slide plate to appliance by placing locking
handle into position with locking tabs (see Figure 7.1)
and secure with #8 screw.
• Leveltheappliance fromsideto sideand front toback. If
necessary, usetheleveling legsincluded withthemanual
bag to set each corner of the base.
• Position any excess flexible vent pipe back up into
chimney without sagging. Twist and push flex vent
together to shorten.
• Non-combustible, unfaced fiberglass insulation may be
installed between the back of the decorative surround
and the face of the existing fireplace surround to which
the insert is being installed.
• Attach surround. Follow instructions accompanying
surround.
• Push insert so that surround becomes tight against face
of fireplace.
Fire Risk.
Only an approved Hearth & Home Technologies
surround may be used to cover integral grills on
solid fuel burning fireplaces.
• No other components such as shrouds, sheet-
metal plates, etc., may be used to seal off vents.
Failuretoposition the parts in accordancewiththesediagrams
or failure to use only parts specifically approved with this
appliance may result in property damage or personal injury.
Explosion Risk.
Combustion Fume Risk.
WARNING
WARNING
WARNING
• Connect vent sections per installation instructions.
• Connectexhaustvent pipe ONLYto exhauststarting collar
and termination cap center collar.
• Connect inlet air vent ONLY to inlet air collar on appliance
and either the termination cap inlet air collar OR terminate
within chimney.
• Do NOT allow vent to sag below connection point to
appliance.

13Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/09
D. Installing Termination Cap
For installation of termination cap see minimum vent
heights for various pitched roofs (see Figure 7.3) .
Roof Pitch H (Min.) Ft.
Flat to 6/12....................1.0*
Over 6/12 to 7/12........1.25*
Over 7/12 to 8/12..........1.5*
Over 8/12 to 9/12..........2.0*
Over 9/12 to 10/12........2.5*
Over 10/12 to 11/12.....3.25
Figure 7.3 Minimum Height from Roof to Lowest Discharge
Opening
* 3 foot minimum in snow regions
Roof Pitch H (Min.) Ft.
Over 11/12 to 12/12.......4.0
Over 12/12 to 14/12.......5.0
Over 14/12 to 16/12.......6.0
Over 16/12 to 18/12.......7.0
Over 18/12 to 20/12.......7.5
Over 20/12 to 21/12.......8.0
CLASS A PIPE
Figure 7.4
Damper Flashing Kit (Optional)
For use with LINK-DV4-30B Liner Kit.
Note: Damper may have to be removed to use this kit.
• Run flex liners through 3” holes in damper flashing.
• Attach damper flashing to firebox roof with self tapping
screws included in kit.
Figure 7.5
To help eliminate cold air drafts, it may be necessary to place non-
combustible insulation around the flues as they go though the damper. Note: The LINK-DV4-30B
system REQUIRES this insulation.
Masonry Factory Built
Wood Burning
EXHAUST
AIR
VENT PIPE
TERMINATION
CAP
LINK-DV30B
Installation LINK-DV4-30B
Installation
INLET AIR
VENT PIPE
WARNING:
DO NOT BLOCK
THIS PIPE END!
Note: Untwist
the pipe while
extending it, to
achieve full 30’
length.
Remove 18 inch x 18 inch flashing on cap by removing
3 screws. Connect both the LINK-ZC-ADPB to Class
A Pipe and the termination cap to the LINK-ZC-ADPB
with the self tapping screws provided.
OPTIONAL LINK-ZC-ADPB
FOR USE WITH CLASS A
WOODBURNING PIPE
ÍORÎ
CAUTION
Sharp Edges
• Wearprotective gloves and safety
glasses during installation.
HORIZONTAL
OVERHANG
VERTICAL
WALL
GAS DIRECT VENT
TERMINATION CAP
12
X
ROOF PITCH
IS X/ 12
LOWEST
DISCHARGE
OPENING
2 FT.
MIN.
20 INCHES MIN.
H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING

Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/0914
• Ensure that gas line does not come in contact with outer
wrap of appliance. Follow local codes.
• Incoming gas line should be piped into the valve
compartment and connected to the 1/2 inch connection
on the manual shutoff valve.
• Check all fittings and connections of appliance which
may have loosened during shipping.
8
8 Gas Information
Note: Have the gas supply line installed in accordance
with local building codes, if any. If not, follow ANSI
223.1. Installation should be done by a qualified installer
approved and/or licensed as required by the locality. (In
the Commonwealth of Massachusetts installation must be
performed by a licensed plumber or gas fitter).
A. Fuel Conversions
Before making gas connections ensure that appliance be-
ing installed is compatible with the available gas type.
Any natural or propane gas conversions necessary to
meet the appliance and locality needs must be made by
a qualified technician using Hearth & Home Technologies
specified and approved parts.
B. Gas Pressures
Proper input pressures are required for optimum appli-
ance performance. Gas line sizing requirements need to
be made following NFPA54.
Fire Risk.
Explosion Hazard.
High pressure will damage valve.
• Disconnect gas supply piping BEFORE
pressure testing gas line at test pressures
above 1/2 psig.
• Close the manual shutoff valve BEFORE
pressure testing gas line at test pressures
equal to or less than 1/2 psig.
Verify inlet pressures.
• High pressure may cause overfire condition.
• Low pressure may cause explosion.
• Verify minimum pressures when other
household gas appliances are operating.
Install regulator upstream of valve if line
pressure is greater than 1/2 psig.
NOTE: Gasline may be run fromeithersideof the appliance
provided the hole in the outer wrap does NOT exceed 2-1/2
inches in diameter and does not penetrate the firebox.
NOTE: A listed (and Commonwealth of Massachusetts ap-
proved) 1/2 inch (13 mm) T-handle manual shut-off valve and
flexible gas connector are connected to the 1/2 inch (13 mm)
control valve inlet.
• If substituting for these components, please consult
local codes for compliance.
Pressure requirements for appliance are shown in the
table below. Minimum pressures must be met when other
household gas appliances are operating.
Refer to Reference Section 15 for location of gas line
access in appliance.
Gas Leak Risk
• Support control when attaching pipe to
prevent bending gas line.
NOTE: The gap between supply piping and gas access
hole may be caulked with high temperature caulk or stuffed
with non-combustible, unfaced insulation to prevent cold air
infiltration.
WARNING
WARNING
Pressure Natural Gas Propane
Minimum inlet pressure 5.0 inches
w.c. 11.0 inches w.c.
Maximum inlet gas pressure 14.0 inches
w.c. 14.0 inches w.c.
Manifold pressure 3.5 inches
w.c. 10.0 inches w.c.
WARNING
C. Gas Connection

15Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/09
Fire hazard.
Do NOT change the valve settings.
• This valve has been preset at the factory.
• Changing valve settings may result in fire
hazard or bodily injury.
HIGH ALTITUDE INSTALLATIONS
U.L. Listed gas appliances are tested and approved without
requiring changes for elevations from 0 to 2000 feet in the
U.S.A. and Canada.
Wheninstalling thisapplianceat anelevationabove 2000feet,
itmaybe necessary to decrease the inputrating by changing
the existing burner orifice to a smaller size. Input rate should
be reduced by 4% for each 1000 feet above a 2000 foot
elevation in the U.S.A., or 10% for elevations between 2000
and 4500 feet in Canada. If the heating value of the gas has
beenreduced,theserulesdo not apply.To identify the proper
orifice size, check with the local gas utility.
If installing this appliance at an elevation above 4500 feet (in
Canada), check with local authorities.
CHECK FOR GAS LEAKS
Explosion Risk
Fire Risk
Asphyxiation Risk
• Check all fittings and connections.
• Do not use open flame.
• Afterthegasline installation is complete, all
connectionsmustbetightenedandchecked
for leaks with a commercially-available,
non-corrosive leak check solution. Be sure
to rinse off all leak check solution following
testing.
Fittings and connections may have loosened
during shipping and handling.
Fire or Explosion Hazard
• Gas buildup during line purge may ignite.
• Purge should be performed by qualified technician.
• Ensure adequate ventilation.
• Ensure there are no ignition sources such as
sparks or open flames.
• A small amount of air will be in the gas supply lines.
When first lighting appliance it will take a short time for
air to purge from lines. When purging is complete the
appliance will light and operate normally.
WARNING
WARNING
WARNING

Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/0916
A. Wiring the Appliance
9
9 Electrical Information
Note:This appliance mustbe electricallywired andgrounded
in accordance with local codes or, in the absence of local
codes, with National Electric Code ANSI/NFPA 70-latest
edition or the Canadian Electric Code, CSA C221.1.
ON/OFF Switch
• An ON/OFF switch is included with the door/front and
should be attached to the door/front. The location of the
ON/OFF switch varies depending on model. It may be
installed on the valve cover plate or included with the
decorative surround. (See Installation instructions for
remote control).
• If desired an additional wall switch or thermostat may
be added to system as shown in Figure 9.1. Follow
directions included with the optional wall switch.
Appliance Requirements
• This appliance DOES NOT require 110-120 VAC to
operate.
• It is recommended that a 110 VAC junction box be
connectedfor usewith fanor remotecontrol. (SeeFigure
9.2 for junction box wiring).
• Prevent accidental appliance operation when not attended.
• Unplug or remove batteries from remote control if absent or
if appliance will not be used for an extended period of time.
• Property damage possible from elevated temperatures.
CAUTION
ON
OFF
ON/OFF
SWITCH
REMOTE SWITCH
PIGTAIL
OPTIONAL WALL SWITCH,
THERMOSTAT OR REMOTE
STANDING
PILOT
WHT
RED
VALVE
Note: Electrical wiring must be installed by a licensed
electrician.
Figure 9.1 Standing Pilot Ignition Wiring Diagram
Wire 110V to electrical junction box.
Do NOT wire 110V to valve.
Do NOT wire 110V to wall switch.
• Incorrect wiring will damage millivolt valves.
• Incorrect wiring will override IPI safety lockout
and may cause explosion.
WARNING
• A 110-120 VAC circuit for this product must be protected
withground-faultcircuit-interrupterprotection,incompliance
with the applicable electrical codes, when it is installed in
locations such as in bathrooms or near sinks.

17Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/09
B. Optional Junction Box Installation
Figure 9.2 Optional Junction box installation
JUNCTION
BOX
SIDEWALL
JUNCTION BOX ACCESS
SCREW
PROVIDED
Optional Accessories
Connecting the electrical junction box is required if using
a blower or remote.
• Plug the cord into a convenient outlet.
• An electrician may install an outlet box inside the
fireplace. Place the outlet in the lower, back corner of
the fireplace.
• Must use cord supplied.
CAUTION
Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation.
Verify proper operation after servicing.
Shock hazard.
• Replace damaged wire with type 105º C rated
wire.
• Wire must have high temperature insulation.
WARNING
Note: The MTL-INSERT does not ship standard
with a junction box. The junction box is an op-
tional accessory.

Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/0918
Figure 9.3 Fan/Rheostat Wire Diagram (Optional)
JUNCTION BOX
VARIABLE SPEED CONTROL
TEMPERATURE
SENSOR SWITCH
WHT
GRN
BLK
BLK
110-120 VAC
BLOWER
BLOWER RECEPTACLE
BLK
BLK
BLK
BLK
WHT
GROUND
WHT
BLK
BLK
BLK
FAN
TEMPERATURE
SENSOR SWITCH
SPEED CONTROL
(RHEOSTAT)
JUNCTION
BOX
GROUND WIRE
(ATTACH TO ANY
METAL SURFACE)
BEND
UP TABS
Note: The MTL-INSERT does not ship standard with a fan. The fan is an optional accessory.

19Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/09
A. Mantel Projections
Figure10.1 showstheminimumverticaland corresponding
maximum horizontal dimensions of appliance mantels or
other combustible projections above the top front edge of
the appliance, not the surround.
10
10 Finishing
Figure 10.1 Clearances to Mantels or other Combustibles
above Appliance
MEASUREMENTS FROM
TOP EDGE OF UNIT
15 in. MIN.
12 in. MAX.
MANTEL
EXHAUST
VENT PIPE
INLET AIR
VENT PIPE

Heat & Glo • MTL-Insert • 2145-900 Rev. G • 6/0920
Figure 11.1 Placement of Embers
11
11 Appliance Setup
A. Remove Shipping Materials
Remove shipping materials from inside or underneath the
firebox.
B. Clean the Appliance
Clean/vacuum any sawdust that may have accumulated
inside the firebox or underneath in the control cavity.
C. Accessories
Install approved accessories per instructions included
with accessories. See Service Parts List for appropriate
accessories. Refer to Section 15.
Shock or fire risk.
Use ONLY optional accessories approved for
this appliance.
• Using non-listed accessories voids warranty.
• Using non-listed accessories may result in a
safety hazard.
• Only Hearth & Home Technologies approved
accessories may be used safely.
D. Ember Placement
Explosion Risk.
• Follow ember placement instructions in manual.
• Do NOT place embers directly over burner ports.
• Replace ember material annually.
Improperly placed embers interferes with proper burner
operation.
Placing the Ember Material
Embermaterial isshipped withthis gasappliance.To place
the ember material:
• Embers CANNOT be placed directly over ports.
• When placing Glowing Embers® onto the burner care
should be taken so that the ports are not covered. Place
the dime-size ember pieces near port holes in burner
top, sides and front (see Figure 11.1). Failure to follow
this procedure will likely cause lighting and sooting
problems.
• Place Mystic Ember over burner surface and around
base of burner. Do not cover any burner port holes. Use
this material to give the appliance a realistic ash bed.
• Save the remaining ember materials for use during
appliance servicing. The embers provided should be
enough for 3 to 5 applications.
WARNING
WARNING
EMBER MATERIAL