WarmingTends HMLS60-NG User manual

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DESIGN CERTIFIED CROSSFIRE SYSTEMS
HMLS60-24V LP/NG
DMLS60-3V LP/NG
MLS60 LP/NG

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WARNING: FOR OUTDOOR USE ONLY
Improper installation, adjustment, alteration, service, or
maintenance can cause injury or property damage. Read the
installation, operating, and maintenance instructions thoroughly
before installing or servicing this equipment.
Warning: •Do not store or use gasoline or other flammable
vapors and liquids in vicinity of this or any other appliance.
•An LP-cylinder not connected for use shall not be stored in the
vicinity of this or any other appliance.
Danger: If you smell gas:
1) Shut off gas to appliance.
2) Extinguish any open flame.
3) If odor continues, keep away from appliance and immediately
call gas supplier or fire department.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
Instructions are also available at www.warming-trends.com
Index:
1) General Info
2) Location
3) Construction of Enclosure
4) Fire Pit Installation
5) Media
Product Specific Information
6) Parts List
7) Installation For Stacked Stone Enclosure When Applicable
8) Fire Pit Operation
9) Maintenance
10) Troubleshooting
11) Warranty

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1) General Info
Instructions are also available at www.warming-trends.com
Please carefully follow the instructions in this manual to prevent personal
injury or property loss. Instructions are updated as needed. It is the
installer’s responsibility to periodically review instruction for applicable
updates.
The steps listed as:
Warnings: Contains information critical to the safe installation and
operation of the fire-pit.
WARRANTY REQUIREMENT: Must be strictly followed to qualify for
product warranty.
Warranty will be void if not followed.
IMPORTANT: Are notes and insights to help ensure product satisfaction
and serviceability.
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Warning: It is the installer’s responsibility to ensure a safe
installation and to educate the end user as to proper
operation. Leave this manual with the end user.
Warning: Never alter product or configuration in any way.
Warning: FOR REMOTE CONTROL USE: To prevent accidental start-
up from unwanted RF signals it is the responsibility of the end user to
turn off power to electric outlet for the remote control receiver when the
fire-pit is not in use via wall switch or breaker.
Warning: We suggest that our products be installed by professionals
that are locally licensed by the authority having jurisdiction in gas piping.
We suggest that our products be serviced annually by a professional
certified in the US by the National Fireplace Institute (NFI) as NFI Gas
Specialists or in Canada by WETT (Wood Energy Technical Training).
Installer must follow all instructions carefully to ensure proper
performance and safety. Warming Trends Company is not responsible for
your actions.
Warning: Product is not intended to be a starter for wood or any
other combustibles.
Warning: It is the responsibility of the installer to follow ALL LOCAL
CODES concerning the installation and operation of the fire pit. In the
absence of local codes, please follow:
●Fixed piping system: The National Fuel Gas Code, ANSI
Z223.1/NFPA 54 or International Fuel Gas Code.
●Electrical ground: The National Electrical Code, ANSI/NFPA 70.
Warning: Only use gas/fuel type specified for this fire pit see label
on the fire pit control Box. Verify correct
gas/fuel type and pressure. Never use an alternative fuel to include bio-
fuel, ethanol, lighter fluid or any other fuel.
Gas pressure and type should be checked prior to use and

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installation.
●Natural Gas Fire Pit:
Supply Pressure: Minimum: 3.5” W.C.; Maximum: 5.0” W.C.
Outlet Pressure: 3.5” W.C.
●LP Gas:
Supply Pressure: Minimum: 10.0” W.C.; Maximum: 11.0” W.C.
Outlet Pressure: 10.0” W.C
2) Location
Warning: All fire pits, match lit kits, spark ignition, safety pilot and
electronic ignition systems are designed and intended for outdoor use
only.
Warning: For electronic ignition models there must be an electrical
shut off ( wall switch or breaker ) on the exterior of the fire pit or on
adjacent wall to allow for emergency shutdown and maintenance.
Warning: All fire pits must have a gas shutoff on the outside of the
exterior of the fire pit to allow for emergency shut off and maintenance.
Warning: Select a location where the fire pit can be attended during
operation. Never leave an operating fire pit unattended or by someone
not familiar with its operation or emergency shut off locations.
Warning: Both children and adults should be alerted to the hazards
of high surface temperatures and should stay away to avoid burns and
clothing ignition.
Warning: Young children should be carefully supervised when they
are in the area of fire pit.
Warning: Clothing or other flammable materials should not be
placed on or near fire pit.
Warning: Fire pits create very high temperatures -Combustibles
must be located far enough away that there is no risk of ignition.
IMPORTANT:It is recommended that material such as granite, marble
or other dense stone be kept away from 6-10” from flame due to risk of
cracking. Manufacturer is not responsible for damage.
Fire Pit Clearances –See Figures 1 and 2 On Last Pages
•Under Valve Box When Applicable 2” For Drainage
•Sides Surrounding Fire Pit 36” From Structure or
Combustibles
•Overhead Clearance 120” Over Head
•Select a location with good drainage.
•Choose a location that allows easy access for installation and
maintenance of the fire pit.
•Pick a location that allows sufficient horizontal room to enjoy the
fire pit while allowing a safe distance from the heat and flame .

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3) Construction of the Enclosure
Warning: For electronic ignition models there must be an electrical
shut off ( wall switch or breaker ) on the exterior of the fire pit or on
adjacent wall to allow for emergency shutdown and maintenance. Verify
correct 110VAC or 24VAC Supply.
Warning: All fire pits must have a gas shutoff on the outside of the
exterior of the fire pit to allow for emergency shut off and maintenance.
Warning: Always use proper materials and construction for gas
supply, power and enclosure.
Warning: The enclosure using LP gas must incorporate 1 vent on at
least two opposing sides (2 vents total) at a minimum size of 18 sq.
inches each (Example: 3”x 6” or larger). Installation of the vents in the
mid to lower area of the enclosure is recommended. Ventilation allows
for heat and or residual fuel to escape. Failure to properly vent enclosure
may result in the fire-pit overheating or explosion. Overheating could
lead to heat damage to internal components. Some enclosures may
require more ventilation based on material, size, and extended use. The
vent may work as a drain as well when installed at bottom sidewall to
prevent water build up.
Warning: The interior void space of the enclosure surrounding the
valve box cannot be filled with any material (gravel, crushed rock,
concrete, etc.)-It is a requirement to have a minimum of 6” under the
valve box for proper ventilation.
Warning: Select materials that are non-combustible in both initial
installations as well as over time.
Warning: The fire pit assembly should be recessed a minimum of
2.25” from the top of the enclosure to protect flame from being blown
out. Some areas may require more-4 to 6” is not uncommon.
WARRANTY REQUIREMENT: The enclosure must be constructed on a
stable surface. The weight of the fire pit must be supported by the pan
and not by any control/valve box. For electronic ignition models the
control/valve box must be above grade with adequate drainage to
prevent water damage to the controls inside the box.
•Make sure that the structure is level. Blocks, bricks or L-brackets
can be used to build a support ledge for the system plate.
•Warming Trends recommends that the plate is recessed on trough
(linear), and large round products as illustrated below.

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4) Fire Pit Installation
***We suggest that our products be installed by professionals that are
locally licensed by the authority having jurisdiction in gas piping.
Warning: We suggest that our products be installed by professionals
that are locally licensed by the authority having jurisdiction in gas piping.
Warning: We suggest that our products be serviced annually by a
professional certified in the US by the National Fireplace Institute (NFI)
as NFI Gas Specialists.
Warning: Confirm this appliance is built for gas used –natural gas
or LP. Do not use natural gas appliance with LP or LP appliance with
natural gas. Refer to the label on the appliance.
Warning: To prevent damage, unhook fire pit from gas supply for
pressure leak tests.
Warning: Fuel line sizing is the responsibility of the installer and
must be able to supply the stated maximum 60K BTU for the product.
Natural gas 3.5” WC pressure and for propane 10” WC pressure.
Warning: Burn Testing-It is the responsibility of the qualified
installer to test for gas leaks at all connections.
Warning: When filling the pan with lava rock and/or decorative
glass, the instructions in Section 5 must be followed.
Warning: Gas Plumbing Connections: Use only joint compound or
tape that is resistant to all gases. Apply joint compound to all male pipe
fittings only-DO NOT use on FLARED fittings. Be sure to tighten every
joint securely.
Warning: For systems with an extended or detached valve box the
area in which the valve box is installed must conform with all installation
requirements to include but not limited to location, construction, venting
and local codes. Failure to do so may result inpersonal injury property
damage or explosion.
WARRANTY REQUIREMENT: Warranty is void if valve box is opened
•Purge gas lines of air.
•Perform all leak test with leak detector or leak reactant.
•Verify correct gas type and pressure.
•Perform leak test on main gas supply. Repair leaks as necessary.
•Shut Off Gas Supply and Power to fire-pit.
•Connect fire-pit to main gas supply. If using flex line avoid sharp
bends with flex line to prevent whistling.
•Turn on gas supply and perform leak test on all inlet connections.
Repair as needed.
•For electronic ignition models hook up proper 110VAC or 24VAC
electrical power following all local codes.
•On electronic ignition models The 6’ power cord can be either tied
into the main power supply for use with wall switch or plugged
into remote receiver to use remotely.
•Position fire pit safely with access to all gas connections for

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testing.
•Light fire pit. It may take several cycles to purge air from the
lines.
oFor electronic ignition models apply proper 110VAC or 24
VAC.
•Once fire pit is lit perform leak test on all gas connections. Repair
as needed.
•Turn off fire pit and allow to cool.
•Apply media as described in (Section 5).
•Turn on fire pit again and perform leak test with media correctly
installed. If gas leak is detected verify correct media application
and repair as needed.
•Set fire pit in properly constructed enclosure (Section 3).
•Verify correct operation and lighting.
•Review safety manual with end user and instruct not to change/
modify fire pit or media.
•Leave manual with end user.
IMPORTANT:On electronic ignition models please apply the Start Up
and Shutdown decal next to control switch in an obvious position.
5) Media
Warning: FOR GLASS MEDIA USAGE WITH LP GAS-WHEN
USING APPROVED DECORATIVE GLASS TO COVER BURNER APPLY
ONLY ENOUGH TO HIDE BURNER. APPLYING OVER 1/2” MAY
CREATE BACK PRESSURE AND GAS LEAKAGE FROM AIR MIXER
RESULTING IN LP POOLING UNDER FIRE PIT.
Warning: FOR GLASS MEDIA USAGE WITH LP GAS-THE UNIT
MUST BE TESTED WITH MEDIA OVER BURNER FOR
CONFIRMATION OF NO BACK PRESSURE CREATING GAS TO LEAK
OUT OF AIR MIXER VENTURI HOLES. THIS MAY HAVE TO BE DONE
PRIOR TO PLACING IN ENCLOSURE IF NO ACCESS DOOR.
Warning: The fire pit is designed to use approved media correctly
installed over the burner to achieve proper combustion.
WARRANTY REQUIREMENT: Never install a mesh or screen under the
media.
IMPORTANT:Media affects flame pattern greatly. It is possible to
create an unusual flame pattern that could damage your enclosure.
Enclosure damage from an open flame fire feature is not covered under
any warranty.
Lava Rock & Glass Application
Please follow the instructions below to add the finishing touch to your fire
pit. Remember the deeper your lava rock or glass the more risk of
reducing if not smothering the flame. Particular attention needs to be on
the pilot assembly area. Incorrect media installation will cause the pilot
flame to suffocate and turn off pit or delay main burner ignition.

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Lava Rock Only Application
1) Install your fire pit per instructions.
2) Apply lava rock ONLY deep enough to cover burner and pan less than
1” below crossfire burner jets.
For Electronic Ignition
3) PILOT ASSEMBLY SCREEN: Do not cover pilot assemble screen or
opening with lava rock or glass. Incorrect media installation will cause
the pilot flame to suffocate and turn off pit or delay main burner ignition.
OPTIONAL –Placing Fire Logs
4) Place approved logs on top of lava rock base.

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Decorative Glass Application
1) Install your fire pit per instructions.
2) Fill Pan with glass. Cover Burner with 1/8 to .” of glass. Do not over
fill with glass. All LP installations must be checked for back pressure with
media installed. Failure to do so may result in personal injury or property
damage.
For Electronic Ignition
3) PILOT ASSEMBLY SCREEN:Do not cover pilot assemble screen or
opening with lava rock or glass. Incorrect media installation will cause
the pilot flame to suffocate and turn off pit or delay main burner ignition.
DO NOT COVER PILOT SCREEN! DO NOT COVER PILOT OPENING!
6) Parts List
1. Fire Pit and/or MLS60 and Electronic Control Systems
•Crossfire Burner (CFB60)
•Aluminum Plate (ALP)
•Honeywell Electronic Ignition System (24VIK)
•Includes gas valve, pilot assembly and ignition control module.
•Dexen Electronic Ignition system (3VIK)
•Includes gas valve, pilot assembly and ignition control module.
•(MLS60)- Includes 3.5” WC, natural gas regulator or 10” WC,
liquid propane gas regulator.
•Models:
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!Fireplaces and Fire Pits
Model Number
Description
CFP60
Fireplace Insert –Grates and Logs included
MFP60
Fireplace Insert –Grates and Logs included
FBI42
Fireplace Box Insert 42”
FP6060
Fireplace Kit 60” x 60” x 24” Square
FT3636
36” OD x 18” H Square Fire Pit
FR4830
48” ODL x 30” W x 10” Ledge with 28” x 10” Pan
Rectangle Fire Pit
FO42
42” OD x 18” H Octagon Fire Pit
FC42
42” OD x 18” H Round Fire Pit
36OFP
36” Octagon Fire Pit
42OFP
42” Octagon Fire Pit
36SFP
36” Square Fire Pit
42SFP
42” Square Fire Pit
36FP
36” Round Fire Pit
42RFP
42” Round Fire Pit
4830RFP
48” x 30” Rectangle Fire Pit
42RBF
Red Brick Schoolhouse –42” Fire Pit
HOLLY60
Hollyhock Sculptural Fire Pit
SBGH-L
Solid Black Granite Hearth Fire Pit
SBGH-R
Solid Light Granite Hearth Fire Pit
TAIL60
The Tailgater Portable Copper Fire Pit
TAIL-PC60
The Tailgater Coated Aluminum Copper Fire Pit
HDDT60
Hearth 12 Side Fire Table, 4 colors and 8 tile options
HRGT60
Hearth Round Fire Table, 4 colors and 8 tile options
HRNT60
Hearth Round Fire Table, 4 colors options
PXB42
Parallax Fire Table 42” Square, Dark Brown

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PXN42
Parallax Fire Table 42” Square, Nova
PXP42
Parallax Fire Table 42” Square, Provance
PXR42
Parallax Fire Table 42” Square, Lava Red
PXT42
Parallax Fire Table 42” Square, Tuscan
SIMP24
24” Simplicity Fire Bowl
SIMP38
38” Simplicity Fire Bowl
CSIMP36
36” Simplicity Fire Bowl
CSIMP40
40” Simplicity Fire Bowl
HALO36
36” Halo Fire Bowl
HALO48
48” Halo Fire Bowl
ELEVATED
HALO36
36” Elevated Halo Fire Bowl
ELAVATED
HALO48
48” Elevated Halo Fire Bowl
SPIRE
Fire Spire
FIRECUBE
Fire cube
HEMI 26
26” Hemi Fire Bowl
HEMI 36
36” Hemi Fire Bowl
FIREBOX 30
30” Firebox
FIRETABLE
Fire Table
FIRETROUGH
Fire Trough
Note: All models may contain one of the burners listed in the
table below:
60K BTU/h
Burner
Description

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Model Number
HMLS60-*NG
Honeywell, Natural Gas
HMLS60-*LP
Honeywell, Propane Gas
DMLS60-*NG
Dexen, Natural Gas
DMLS60-*LP
Dexen, Propane Gas
MLS-60 NG
Match Lit, Natural Gas
MLS-60 LP
Match Lit, Propane Gas
CFB-60-*NG
Crossfire, Natural Gas
CFB-60-*LP
Crossfire, Propane Gas
•* represents ignition system type: 3V, 3VIK, 24V, 24VIK, MLS
2. Instructions – See below.
7) Installation
Warning: If using an LP bottle, position at safe distance away from
flame.
1. Read and follow all instructions.
2. Mount control box firmly so it is accessible to the user.
3. Mount product in your enclosure per Section 3.
4. Connect fuel supply to inlet of valve.
5. Leak test all fittings and connections.
6. For LP models check back pressure with media installed. This may
need to be done with the pit outside of the enclosure.
8) Fire Pit Operation
Warning: If you do not follow these instructions exactly, a fire or
explosion may result causing property damage, personal
injury, or loss of life.
Warning: If using an LP bottle, position at safe distance away from
flame.
Warning: Do not place LP bottle inside enclosure.
Warning: Use only your hand to turn the gas key valve. Never use
tools. If the key valve will not turn by hand, don’t try to repair it. Call a
qualified technician. Force or attempted repair may cause a fire or
explosion.
Warning: Before use, be sure to test all gas connections for leaks.
Do not use fire pit if there is any evidence of leaking gas. If leaking gas
suspected, turn off the main gas supply and repair.

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Warning: Wind and gusty conditions will affect the flame in an
unpredictable manner. If conditions exist that are not safe for patrons
turn the fire pit off.
Warning: Do not use fire pit if any part has been submerged under
water. Immediately call a qualified service technician to inspect the fire
pit.
Warning: Never use any material that is non-porous and holds
moisture such as gravel, pebbles, river rock, etc. This material, when
heated will cause the trapped moisture to boil and fracture unexpectedly.
This material is not sufficiently porous to allow heated steam to readily
escape which can break and cause personal injury or damage.
Warning: Solid fuels shall not be burned in the fire pit. Leaves,
sticks, wood, paper, clothing, food material, should be kept away from
the fire pit. Make sure that there is no vegetation or other objects over
the top or sides of the fire pit that could interfere with safe operation.
See clearances in section 2 Selecting the Location.
Warning: If lava rock is wet, allow fire pit to burn for 45 minutes
prior to coming within 15 feet of the fire pit.
Warning: When fire pit is not in operation turn off gas valve.
WARRANTY REQUIREMENT: When not in use the fire pit must be
covered at all times.
IMPORTANT:Initial Start-up: It may be necessary to purge air in gas
lines after system installation.
MANUAL LIGHTING INSTRUCTIONS
1. STOP! Read the safety information above.
2. Turn key valve (Fig. 1) slightly and turn counterclockwise to the OFF
position.
3. Wait (5) minutes to clear out any gas. Then smell for gas.
a. If you smell gas, STOP! See front page-“What to do if smell gas”
section.
b. If you do not smell gas, proceed to next step.
4. Turn key valve slowly clockwise to the ON position (Fig. 2) while
igniting lighter simultaneously to ignite gas.
(Fig. 1) Turn key valve (Fig. 2) Light while turning key valve

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Check for good flame and gas leaks Add media and repeat
Warning: If the flame will not stay lit after several tries, turn the key
valve to the OFF position and call your service technician or gas supplier.
5. Never leave fire pit unattended by an adult.
TO TURN OFF GAS APPLIANCE
1. Turn key valve counterclockwise until it stops.
2. Carefully verify flame is OUT.
3. After cooling, cover fire pit with vinyl cover.

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9) Maintenance
Warning: Any guard or protective device removed for servicing must
be replaced prior to
operating the fire pit.
Warning: Installation and repair should be done by a qualified
service person. Fire pits
should be inspected prior to use and at least annually by a qualified
service person.
Warning: Ensure gas and power (if applicable) are shut off and fire
pit is cool before servicing.
•Keep fire pit covered at all times when not in use.
•Keep any debris out of fire pit-clean as needed.
•In some areas of the country spiders or insects have been known
to build nest and or lay eggs in the venture holes of the air-mixer
for LP units. This can cause fuel to fill the fire feature cavity and
result in personal injury or property damage. Periodical inspection
by a qualified service technician of the air-intake is required to
ensure your fire feature performs properly.
•Crossfire Jet Cleaning: (1 x YR) If flames exhibit any abnormal
shapes or behavior, or if burner fails to ignite properly, then the
burner holes may require cleaning. The appliance can be cleaned
by carefully removing the logs and media to allow access to
burner. Use a paperclip and carefully insert in jet to remove dust,
spider webs, and loose particles from base, logs, and crossfire
burner itself. If evidence of damage, crossfire burner must be
replaced with crossfire burner specified by manufacturer.
•Thermocouple Cleaning of Soot: (1 x 6 mos. or as needed)
Remove lava rock & glass around pilot, then the blow out box lid.
Clean thermocouple of any soot using soft brush. Be careful not to
damage hot wire element. Place lava rock or glass back as
explained in section 5.
•Visually inspect the pilot-The pilot flame should cover 3/8” to 1/2”
of the thermocouple as shown below. Cleaning of orifice may be
required by removing pilot hood (CCW) and removing orifice as
shown below.
10) Troubleshooting
Contact your authorized dealer for replacement parts.
Below are some potential causes and countermeasures to the symptoms
indicated in bold. Please contact your retailer or certified
technician for service & repair.
No Pilot Flame (Hot Wire Glows)
1. Air in gas line. If new install, may take several attempts to purge air
2. Debris in gas line. Confirm gas line is clear (insulation, dirt, plastic etc..)
3. Gas Pressure Improper Confirm proper gas pressure (Section 1)
4. Pilot Orifice Dirty Remove pilot head and clean (Section 8)

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No Main Burner (Pilot Lights)
1. Gas Pressure Improper Confirm proper gas pressure (Section 1)
2. Small Pilot Flame Remove pilot head and clean orifice. ( Section 8)
3. Dirty Thermocouple Clean using soft brush (Section 8)
4. Crossfire Burner Obstructed Confirm no debris or water in burner (Always
cover fire pit!)
5. Improperly applied Media See (Section 5)
Main Burner Turning Off/On Frequently
1. Small Pilot Flame Remove pilot head and clean orifice (Section 8)
2. Improperly applied Media See (Section 5)
3. Gas Pressure Improper Gas pressure too low (Section 1)
4. Thermocouple Defective Change Thermocouple.
Noise
1. Whistling Sound Change Flex line routing
11) Warranty
Limited Warranty
Warming Trends warranties fire pits against manufacturing defects that
prevent safe and correct function as follows:
•Electronics, Gas Valve, & Pilot Assembly: Commercial-6mos;
Residential-1 yr.
•Aluminum plate, Brass Crossfire Burner: LIFETIME
This commences from the date of original sale / shipment from Warming
Trends FOB Littleton, Colorado. This warranty is for parts and in-house
(Warming Trends) labor. The defective product must be sent back to
Warming Trends with a Return Merchandise Authorization (RMA) issued by
Warming Trends for that specific product and any other additional
information for the nature of the defect or warranty claim.
The warranty does not cover items that have been damaged by overheating,
modification, abuse, flooding or improper storage. Also any labor involving
installation or maintenance with the unit is not covered.
This warranty excludes claims for consequential, indirect-collateral expenses
arising from product defects or warranty recovery.

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HMLS60 with LP or NG with Honeywell Electronic Spark Ignition
System

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DMSL60 with LP or NG with Dexan 3 Volt Battery or 110 Ignition
System

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MLS60 with LP or NG Regulator

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System Tags and Markings