Master MH-09SLN-A User manual

MH-09SLN-A
MH-18SLN-A
PORTABLE PROPANE HEATER
INSTRUCTION MANUAL
MODE D’EMPLOI DE LA CHAUFFERETTE
PORTATIVE AU PROPANE
CALENTADOR DE PROPANO PORTÁTIL
MANUAL DE INSTRUCCIONES
WARNING: When this heater is used as a camp heater for
indoor use, it can only be used in the US and in the location allowed
where local authorities have jurisdiction. Do not use this heater indoors
in Canada.
AVERTISSEMENT : Lorsque cette chauerette est utilisée
comme chauerette de camping à l’intérieur, elle peut seulement
l’être aux États-Unis et dans des emplacements permis relevant de la
compétence des autorités locales. Ne pas utiliser cette chauerette à
l’intérieur au Canada.
ADVERTENCIA: Cuando se usa este calentador como
calentador para campamento en interiores, solo puede usarse en
EE.UU. y en ubicaciones permitidas donde autoridades locales tengan
jurisdicción. No use este calentador en interiores en Canadá.
IF YOU HAVE QUESTIONS OR COMMENTS, CONTACT US.
POUR TOUTE QUESTION OU TOUT COMMENTAIRE, NOUS CONTACTER.
SI TIENE DUDAS O COMENTARIOS, CONTÁCTENOS.
MASTERINDUSTRIALPRODUCTS.COM800.641.6996
FOR CANADA AND USA MASSACHUSETTS SALES.
POUR LE CANADA ET LES ÉTATSUNIS
MASSACHUSETTS VENTES
PARA SU VENTA EN CANADÁ Y EE.UU.
MASSACHUSETTS.
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WARNING: FIRE OR EXPLOSION HAZARD
If you smell gas:
1. Do not attempt to light appliance.
2. Extinguish any open flame.
3. Disconnect fuel supply.
4. Leave the area immediately.
5. Allow gas to dissipate 5 minutes before relighting the
appliance.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
Failure to follow these instructions could result in fire or explosion,
which could cause property damage, personal injury, or death.
WARNING: When used without adequate combustion and
ventilation air heater may give off excessive CARBON
MONOXIDE, an odorless, poisonous gas.
DANGER: FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance. A propane
cylinder not connected for use shall not be stored in the vicinity
of this or any other appliance.
WARNING: CARBON MONOXIDE POISONING MAY CAUSE
DEATH OR INJURY
When used without adequate combustion and ventilation air,
heater may give off excessive CARBON MONOXIDE, an odorless,
poisonous gas. This is an unvented gas-fired heater. This heater
uses air (oxygen) from the area in which the heater is used.
Adequate combustion and ventilation air must be provided.
Refer to page 11.
DO NOT USE THIS HEATER UNTIL ALL NECESSARY PROVISIONS
ARE MADE FOR COMBUSTION AND VENTILATION AIR. CONSULT
THE WRITTEN INSTRUCTIONS PROVIDED WITH THE HEATER FOR
INFORMATION CONCERNING COMBUSTION AND VENTILATION AIR.
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MH-09SLN-A • MH-18SLN-A
For ANSI Z21.103-2017 INDOOR/OUTDOOR CAMP HEATER
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MH-09SLN-A is certified as an indoor/outdoor camp heater under ANSI
Z21.103-2017 for the US only and is certified as an outdoor camp heater
under ANSI Z21.63/CSA 11.3 for both the US and Canada.
MH-18SLN-A is certified as an indoor/outdoor camp heater under ANSI
Z21.103-2017 for the US only, and is certified as a GAS FIRED OUTDOOR
INFRARED PATIO HEATER under ANSI Z83.26/CSA 2.371 for both the US
and Canada.

DANGER: CARBON MONOXIDE HAZARD
This appliance can product carbon monoxide which
has no odor. Using it in an enclosed space can kill
you. Never use this appliance in an enclosed space
such as a camper, tent, car, or home.
WARNING: Improper installation, adjustment, alteration,
service, or maintenance can cause injury or property damage.
Refer to this manual. For assistance or additional information,
consult a qualified installer, service agency, or the gas supplier.
WARNING: FIRE OR EXPLOSION HAZARD
If you smell gas:
1. Do not attempt to light appliance and make sure appliance is
in the "OFF" position
2. Extinguish any nearby flame.
3. Shut off the cylinder fuel supply valve, if so equipped.
4. Disconnect the disposable fuel cylinder. if so equipped
5. Leave the area immediately.
6. Allow gas to dissipate 5 minutes.
7. If gas smell has dissipated from the area, the appliance,
and fuel supply, follow gas connection procedures. If you smell
gas again, follow steps 1-6 and have appliance serviced.
Failure to follow these instructions could result in fire or
explosion, which could cause property damage, personal injury,
or death.
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MH-09SLN-A
For ANSI Z21.63-2019 • CSA 11.3:19 OUTDOOR CAMP HEATER
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ENGLISH
4
WARNING: For outdoor use only.
DANGER: CARBON MONOXIDE HAZARD
This appliance can product carbon monoxide which
has no odor. Using it in an enclosed space can kill
you. Never use this appliance in an enclosed space
such as a camper, tent, car, or home.
WARNING: Improper installation, adjustment, alteration,
service, or maintenance can cause injury, property damage,
or death. Read the installation, operating and maintenance
instructions thoroughly before installing or servicing this
equipment.
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MH-18SLN-A
For CSA/ANSI Z83.26:20 • CSA 2.37:20 GAS FIRED OUTDOOR INFRARED PATIO HEATER
DANGER: If you smell gas:
1. Shut off gas to the appliance.
2. Extinguish any open flame.
3. If odor continues, keep away from the appliance and
immediately call your gas supplier or fire department.
DANGER: Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance. A propane cylinder not connected for use shall not
be stored in the vicinity of this or any other appliance.
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DANGER: FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance. A propane
cylinder not connected for use shall not be stored in the vicinity
of this or any other appliance.
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WARNING: DO NOT TAMPER WITH THE SAFETY SYSTEM!
WARNING: CARBON MONOXIDE POISONING MAY LEAD TO DEATH!
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Please retain instructions for future reference.
Heater is not to be used with fixed pipe system.

ENGLISH
1
WARNING: Read all safety warnings and all
instructions. Failure to follow the warnings
and instructions may result in electric
shock, fire, and/or seriousinjury.
WARNING: To reduce the risk of injury,
read the instructionmanual.
If you have any questions or comments
about this or any product, call Master at
800.641.6996.
WARNING: Never modify the product or
any part of it. Damage or personal injury
couldresult.
DEFINITIONS: SAFETY ALERT SYMBOLS AND WORDS
This instruction manual uses the following safety alert symbols and words to alert you to hazardous
situations and your risk of personal injury or property damage.
DANGER: Indicates an imminently hazardous situation which, if not avoided,
will result in death or seriousinjury.
WARNING: Indicates a potentially hazardous situation which, if not avoided,
could result in death or seriousinjury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderateinjury.
(Used without word) Indicates a safety related message.
NOTICE: Indicates a practice not related to personal injury which, if not avoided,
may result in propertydamage.
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MODEL # MH09SLNA
BTU 4,500 / 9,000
FUEL CONSUMPTION LB./HR 0.21 / 0.42
HEAT SETTINGS 2
MAXIMUM OPERATING HOURS
WITH 1LB. TANK 4.7 / 2.3
MINIMUM INLET PRESSURE 25 PSIG
MAXIMUM INLET PRESSURE TANK PRESSURE
FUEL TYPE
USE ONLY 1LB. LP 4" X 8",
10.2 CM X 20.3 CM OR 20LB.
GAS CYLINDER 18" X 12.25",
45.7 CM X 31.1 CM
HEATING AREA FT.2225
MANIFOLD PRESSURE 11 INCHES WATER COLUMN
CERTIFICATION
MODEL # MH18SLNA
BTU 4,500 / 9,000 / 18,000
FUEL CONSUMPTION LB./HR 0.21 / 0.42 / 0.84
HEAT SETTINGS 3
MAXIMUM OPERATING HOURS
WITH OPTIONAL HOSE &
REGULATOR 4.7 / 2.3 / 1.1
MINIMUM INLET PRESSURE 25 PSIG
MAXIMUM INLET PRESSURE TANK PRESSURE
FUEL TYPE
USE ONLY 1LB. LP 4" X 8",
10.2 CM X 20.3 CM OR 20LB.
GAS CYLINDER 18" X 12.25",
45.7 CM X 31.1 CM
HEATING AREA FT.2450
MANIFOLD PRESSURE 11 INCHES WATER COLUMN
CERTIFICATION
MASTER®9,000 BTU PORTABLE
PROPANE HEATER MASTER®18,000 BTU PORTABLE PROPANE HEATER
The MH-09SLN-A is designed and approved for use as a heater in accordance with Standard for gas
camp heaters - for indoor/outdoor use - US only. ANSI Z21.103-2017. For Outdoor use- Canada and
US only ANSI Z21.63:19/ CSA 11.3:19. The MH-18SLN-A is designed and approved for use as a heater
in accordance with Standard for gas heaters for indoor/outdoor use - US only. ANSI Z21.103-2017. For
Outdoor use- Canada and US only CSA/ANSI Z83.26:20 • CSA 2.37:20, this standard is for use as
patio heater. CHECK WITH YOUR LOCAL FIRE SAFETY AUTHORITY IF YOU HAVE ANY QUESTIONS
ABOUT APPLICATIONS. Other standards govern the use of fuel gasses and heating products for
specific uses. Your local authority can advise you about these.
Specifications subject to change without notice.

ENGLISH
2
MH-09SLN-A / MH-18SLN-A
GENERAL HAZARD WARNING
DANGER: Failure to comply with the
precautions and instructions provided with
this heater, can result in death, serious
bodily injury and property loss or damage
from hazards of fire, explosion, burn,
asphyxiation, carbon monoxide poisoning
and / or electric shock. Only persons who
can understand and follow the instructions
should use or service this heater. If you
need assistance or heater information such
as an instructions manual, label, etc. contact
the manufacturer.
SAVE ALL WARNINGS AND INSTRUCTIONS
FOR FUTURE REFERENCE
SAFETY INFORMATION
WARNING: This product can expose you to
chemicals, including lead, which are known
to the State of California to cause cancer
and birth defects or other reproductive
harm. For more information go to
www.P65Warnings.ca.gov.
WARNING: Fire, burn, inhalation, and
explosion hazard. keep solid combustibles,
such as building materials, paper or
cardboard, a safe distance away from
the heater as recommended by these
instructions. Never use the heater in spaces
which do or may contain volatile or airborne
combustibles, or products such as gasoline,
solvents, paint thinners, dust particles or
unknown chemicals. Keep all combustible
materials, gasoline, and other flammable
vapors and liquid away from this heater.
DANGER: Carbon Monoxide Hazard This
heater produces carbon monoxide, which
has no odor. Burning the heater in an
enclosed space can kill you. Never use the
heater in enclosed spaces such as a tent, a
camper, any vehicle or recreational vehicle
(RV), enclosed shelter, building, garage, or
any other enclosed areas without adequate
ventilation.
DANGER: If the information in this manual is
not followed exactly, a fire or explosion may
result causing property damage, personal
injury or loss of life.
WARNING: If the recreational enclosure
does not have a window or roof vent, DO
NOT USE THIS HEATER inside.
WARNING: DO NOT OPERATE THIS
HEATER UNTIL YOU HAVE READ AND
THOROUGHLY UNDERSTAND THESE
SAFETY AND OPERATING INSTRUCTIONS.
Failure to comply with the precautions
and instructions provided with this heater
can result in death, serious bodily injury,
property loss or damage from the hazards
of fire, explosions, burns, asphyxiation or
carbon monoxide poisoning. Only persons
who can read and understand these
instructions should use or service this
heater.
WARNING: EXTREMELY HOT DURING
OPERATION! Do Not touch any metal
components while in operation. Keep all
combustible materials, gasoline, and other
flammable vapors and liquid away from this
heater.
WARNING: This heater is equipped with a
SAFETY SYSTEM designed to turn off the
heater if not enough fresh air is available.
DO NOT TAMPER WITH THE SAFETY
SYSTEM!
If the heater shuts off, do not relight until
you provide fresh air. If heater keeps
shutting off, have the heater serviced. Keep
burner and control compartment clean.
WARNING: RISK OF INDOOR AIR
POLLUTION! The products described in this
manual are propane direct-fired heaters.
Direct-fired means that all of the combustion
products of the heater enter the heated
space. This appliance is rated at 98%
combustion efficiency, but does produce
small amounts of carbon monoxide. Carbon
monoxide is toxic. Humans can tolerate only
small amounts of carbon monoxide and
so precautions should be taken to provide
proper ventilation. Failure to provide
proper ventilation in accordance with the
instructions in this manual can result in
death.
WARNING: Early signs of carbon monoxide
poisoning resemble the flu, with headache,
dizziness, and/or nausea. If you have these
signs, the heater may not be working
properly. GET FRESH AIR AT ONCE! Have
heater serviced. Some people—pregnant
women, persons with heart or lung disease,
anemia, those under the influence of
alcohol, those at high altitudes—are more
affected by carbon monoxide than others.
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ENGLISH
3
SAFETY INFORMATION (CONT.)
DANGER: PROPANE IS AN EXPLOSIVE
GAS. WHAT TO DO IF THE SMELL OF GAS
IS PRESENT:
– DO NOT attempt to light the heater.
– Extinguish any open flame.
– Disconnect fuel supply.
– If odor continues, contact your local gas
supplier or fire department.
– DO NOT touch or use any electric switch
or any electric device that can cause a
spark.
– Immediately call your gas supplier from
a neighbor's phone. Follow the gas
suppliers instructions.
– If you can not reach your gas supplier, call
the fire department.
– Service must be done by a qualified
service agency.
WARNING: RISK OF BURNS, FIRE, AND
EXPLOSION!
– NEVER store or use gasoline or other
flammable vapors and liquids in the
vicinity of this heater.
– Young children should be carefully
supervised when they are in the are of
the heater.
– Clothing or other flammable materials
should not be hung from the heater or
placed on or near the heater.
– Any guard or other protective device
removed for servicing the heater must be
replaced prior to operating the heater.
– NEVER connect heater to an unregulated
gas supply.
– NEVER modify this heater or operate a
heater that has been modified.
– NEVER service, move or handle heater
while still hot or operating
Keep all combustible materials, gasoline,
and other flammable vapors and liquid away
from this heater.
CAUTION: HOT WHILE IN OPERATION. DO
NOT TOUCH. KEEP CHILDREN, ANIMALS,
CLOTHING, AND COMBUSTIBLES
AWAY FROM HEATER. HIGH SURFACE
TEMPERATURES CAN CAUSE BURNS AND
CLOTHING IGNITION
WARNING: For use with propane (LP) gas
only.
– ALWAYS position the heater so that it is
not directly exposed to water spray, rain,
dripping water, or wind.
– Use heater in accordance with all local
codes.
– This heater is shipped from the factory
for use with propane (LP) gas only. Do
not convert to any other gas. Installation
must conform to local codes, or in
their absence, with the standard for
the Storage and Handling of Liquefied
Petroleum Gases ANSI/NFPA 58 and
the Natural Gas and Propane Installation
Code CSA B149.1.
– Gas supply connections should be
checked by using a 50/50 soap and
water solution. Never use a flame to
check for gas leaks.
– Use only the regulator and hose
assembly purchased from Master.
Inspect the regulator/hose assembly
prior to each use of the heater. If there
is excessive abrasion or wear, or if the
hose is cut, replace it with the proper
assembly prior to using the heater. The
replacement hose assembly should follow
manufacturer's specification.
– This heater is not for use on finished
surfaces such as floors and tables.
– Never use in a moving vehicle.
– Do not use for cooking or reheating food.
WARNING: The hose assembly shall be
protected from traffic, building material,
and contact with hot surfaces both during
use and while in storage. An enclosure for
a propane gas cylinder shall be ventilated
by openings at both the upper and lower
levels of the enclosure. The effectiveness
of the opening(s) for purposes of ventilation
shall be:
– One side of the enclosure shall be
completely open; or
– For an enclosure having four sides, a top
and a bottom:
– At least two ventilation openings shall
be provided in the sidewalls of the
enclosure, located at the valve level,
equally sized, spaced at a minimum of
90 degrees (1.57 rad), and unobstructed.
The opening(s) shall have a total free area
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Minimum Clearance from Combustibles
MODEL # FRONT SIDES TOP REAR
MH-09SLN-A 40 in. 16 in. 40 in. 0 in.
MH-18SLN-A 40 in. 16 in. 40 in. 0 in.
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ENGLISH
4
SAFETY INFORMATION (CONT.)
of not less than 1 in2/lb (14.2 cm2/kg) of
stored fuel capacity.
– Ventilation opening(s) shall be provided
at floor level of the enclosure and shall
have a total free area of not less than 1/2
in2/lb (7.1 cm2/kg) of stored fuel capacity.
If ventilation openings at floor level are
in a sidewall, there shall be at least two
openings. The bottom of the openings
shall be 1 in (25.4 mm) or less from the
floor level and the upper edge no more
than 5 in (127 mm) above the floor level.
The openings shall be equally sized,
spaced at a minimum of 90 degrees (1.57
rad), and unobstructed.
– Every opening shall have minimum
dimensions to permit the entrance of a 1/8
in (3.2 mm) diameter rod.
– Ventilation openings in sidewalls shall
not communicate directly with other
enclosures of the heater.
WARNING: RISK OF FIRE! ALWAYS
LOCATE HEATER ON A STABLE AND
LEVEL SURFACE!
WARNING: NEVER LEAVE HEATER
UNATTENDED WHILE BURNING,
CONNECTED TO A POWER SOURCE, OR
WHILE CONNECTED TO A FUEL SOURCE.
WARNING: Use only disposable cylinders
marked with the proper fuel type.
– Do not leave this appliance unattended
while in operation. Keep children and
pets away from the appliance at all times.
– A propane fired portable heater used for
emergency home use shall not be set a
an input setting in excess of 5,000 BTU/
Hr (466 W) when located in a bathroom
and shall not be set at an input setting of
more than 10,000 BTU/Hr (2,931 W) when
located in a bedroom. The corresponding
settings for bedroom or bathroom use
shall be clearly adjustment means.
– Items stored under the heater will be
subject to radiant heater and could be
seriously damaged.
– Children and adults should be alerted to
the hazards of high surface temperatures
and should stay away to avoid burns or
clothing ignition.
– Any guard or other protective device
removed for servicing the heater must be
replaced prior to operation of the heater.
– Installation and repair should be done
by a qualified service person. The heater
should be inspected before use and
at least once every year by a qualified
service person. More frequent cleaning
may be required as necessary. It is
imperative that the control compartment,
burners, and circulating air passageways
of the heater be kept clean.
– Appliance may shut down in windy
conditions in excess of 3 miles per hour
(4.83 kilometers per hour).
– When a heater is used with a remote
propane cylinder the user must ensure
that the propane cylinder meets
specifications for self-contained propane
gas cylinder enclosures, outlined on page
5.
MODEL MH09SLNA MH18SLNA
4,500 BTU LOW LOW
9,000 BTU HIGH MEDIUM
18,000 BTU —HIGH
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ENGLISH
5
SAFETY INFORMATION (CONT.)
ENCLOSURES FOR SELFCONTAINED
PROPANE GAS SUPPLY SYSTEMS
An enclosure for a propane gas cylinder shall
be ventilated by openings at both the upper
and lower levels of the enclosure. The effective
ness of the opening(s) for purposes of ventilation
shall be determined with the propane gas supply
cylinder in place. This shall be accompanied by
one of the following:
a) One side of the enclosure shall be completely
open; or
b) For an enclosure having four sides, a top and a
bottom :
i) At least two ventilation openings shall be
provided in the sidewalls of the enclosure,
located at the valve level, equally sized,
spaced at a minimum of 90 degrees (1.57
rad), and unobstructed. The opening(s)
shall have a total free area of not less than
1 in2/lb (14.2 cm2/kg) of stored fuel capacity.
ii) Ventilation opening(s) shall be provided
at floor level of the enclosure and shall
have a total free area of not less than ½
in2/lb (7.1 cm2/kg) of stored fuel capacity.
If ventilation openings at floor level are
in a sidewall, there shall be at least two
openings. The bottom of the openings
shall be 1 in (25.4 mm) or less from the floor
level and the upper edge no more than
5 in (127 mm) above the floor level. The
openings shall be equally sized, spaced at
a minimum of 90 degrees (1.57 rad), and
unobstructed .
iii) Every opening shall have minimum
dimensions to permit the entrance of a 1/8
in (3.2 mm) diameter rod.
iv) Ventilation openings in sidewalls shall
not communicate directly with other
enclosures of the heater.
The cylinder valve shall be readily accessible
for hand operation. A door on the enclosure to
gain access to the cylinder valves is acceptable,
provided it is non-locking and can be opened
without the use of tools. Designs using a cover
to gain access to the cylinder and cylinder valve
shall be provided with handles or equivalent at a
minimum of 180 degrees apart to facilitate lifting
of the cover.
The enclosure for the propane gas cylinder shall
isolate the cylinder from the burner compartment
to provide
a) Shielding from radiation;
b) A flame barrier; and
c) Protection from foreign material, such as hot
drippings.
There shall be a minimum clearance of 2 in
(50.8 mm) between the floor of the propane gas
cylinder enclosure and the ground.
Leak tested inside the enclosure. When the
appliance is equipped with a CGA No. 600
connection, the cylinder must be disconnected
when the heater is not in use.

ENGLISH
6
WHAT'S IN THE BOX
HEATER
ACCESSORIES
HOSE AND REGULATOR
MH-18SLN-A Only (Sold Separately)
GC-00670 GC-00671
20-LB. ADAPTER
(Sold Separately)
Only use Master branded accessories.
Call 800.641.6996 or visit us at MasterIndustrialproducts.com to order parts and accessories.
FEATURES
UNPACKING
1. Remove all packing items applied to heater for shipment.
Keep plastic cover caps attached to inlet connector and hose /
regulator assembly for storage.
2. Remove all items from carton.
3. Check all items for shipping damage. If the
heater is damaged, promptly inform dealer
where you purchased the heater.
Electronic
Ignitor
Safety Guard
Tilting Head
Base
Valve Knob
Handle
For MH-18SLN-A, electronic ignitor AAA battery is not included.
This hose and regulator is not suitable for
CSA/ANSI Z83.26:20 • CSA 2.37:20: Gas-Fired
outdoor infrared patio heaters
This connection assembly is not suitable for
CSA/ANSI Z83.26:20 • CSA 2.37:20: Gas-Fired
outdoor infrared patio heaters

ENGLISH
7
OPERATION
Propane Supply / Information:
Propane (LP)
This heater is not supplied with a propane
cylinder. Use only an approved propane
cylinders.
LP Characteristics
– Flammable, explosive under pressure, heavier
than air and pools in low areas.
– In its natural state, propane has no odor, but
for your safety an odor that smells like rotten
cabbage has been added.
– Contact of propane (LP) gas with the skin can
cause freeze burns.
– Heater is manufactured for use with propane
gas only. DO NOT attempt to convert to any
other gas. Such modifications are dangerous
and will void the warranty.
– When heater is not in use, LP Cylinder must be
removed.
– Be sure that the LP Cylinder is located on a
level and stable surface.
– DO NOT use this heater in a basement or
below ground level. Propane is heavier than
air and will always seek the lowest level. If
you suspect a leak, shut off the valve at the LP
Cylinder immediately.
Basic Information
NOTE: The Master Portable Propane Heater
can be used outdoors, but users may
experience nuisance shutoffs due to certain
wind conditions.
– In cold temperatures, the heat plaques may
take a few minutes to get visibly hot. This is
normal operation.
– It is normal for a small border around the
edge of the heat plaques to not glow while
operating.
– The guard that protects the user from the heat
plaques gets very hot during operation. It has a
special temperature resistant coating. The first
time the heater is turned on, you may notice
smoke or fumes emanating from the protective
guard or the heater. This is normal and should
stop after a few minutes.
– If you notice actual flames or any operation
that does not meet the description in this
manual, turn the heater off and call a qualified
service technician.
– Miniumum operating and storage temperature
is -20°F (-28.8°C)
Tilting Head Feature
The Master Portable Propane Heater features a
patent pending tilting function that allows you
to tilt the top portion of the heater up to 30° to
direct heat to various heights.
– Turn heater to the OFF position.
– From the back side of the heater (opposite
of the heating plaques and guard) place one
hand on the top of the back side of the heater
and one hand on the handle; see Figure 1.
CAUTION: If heater has been previously
operating, the wire guard will remain hot.
Allow guard to cool before handling.
– Gently push down on the top of the heater
until you hear the tilt mechanism click.
– Keep tilting until desired angle is reached or
you reach the limit of the tilting function.
– Follow the Lighting & Operation instructions
for continued usage.
CAUTION: To avoid potential injury, do not
adjust tilting angle while unit is operating.
Checking for Leaks
– To check for leaks, make up a 50/50 solution
of dish soap and water. Apply this solution to
all gas connections. If bubbles appear, there
is a leak. If a leak is found, turn off the gas
supply, and re-connect the leaking connection.
If the leak persists after several tries, contact
Master Service at 800.641.6996.
– The installation of this heater must meet all
local codes and/or gas utility requirements. In
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Figure 1

ENGLISH
8
WARNING: Always inspect propane
cylinder and heater propane connections
for damage, dirt, and debris before
attaching propane cylinder. Do not use if
head of cylinder is damaged, punctured or
deteriorated.
ALWAYS ATTACH OR DETACH CYLINDER
OUTDOORS AWAY FROM FLAMES, OTHER
SOURCES OF IGNITION, AND ONLY WHEN
HEATER IS COOL TO TOUCH.
– Use only LP-gas cylinders marked in
accordance with the U.S. Department of
Transportation (DOT) or CSA B339, as
applicable. Cylinders must be provided with a
listed overfill protection device.
– Use only 1-lb. disposable cylinders (16.4 oz.)
that mate with No. 600 valve connection,
marked propane.
– Keep heater and cylinder in an upright position
during operation.
– Before attaching propane make sure Control
Knob on heater is in “OFF” position; see Figure
2.
– Tilt the regulator outward from the back and
screw the 1-lb. disposable LP-gas cylinder
clockwise (from bottom) into unit until hand-
tight; see Figure 3. DO NOT use thread sealant
on this connection.
– Be sure to inspect all connections for leaks,
by using a 50/50 mixture of dish soap and
water on all connection. Any bubbles forming
indicate a leak.
– Heater must not be exposed to flammable
vapors or liquids during lighting.
– For MH-09SNL-A turn Control Knob
counterclockwise to “PILOT” position and
depress knob to light; see Figure 2.
OPERATION (CONT.)
the absence of local codes, the National Fuel
Code ANSI Z223.1 should be followed.
– The minimum clearances to any combustible
construction materials must be maintained at
all times (See Page 3).
– Inspect the heater before each use, and at
least annually by a qualified service person.
WARNING: EXTREMELY HOT during
operation. Do Not touch any metal
components while in operation. Keep
gasoline and any other flammable liquids
away from the heater.
The Master Portable Propane Heater may not
burn as bright when operating at altitudes
over 2,000 FT. above sea level. This is normal.
At these high altitudes, the unit may shut off
sporadically due to lower levels of oxygen. If this
happens, provide fresh air and wait 5 minutes
and re-light. Localized atmospheric conditions
may cause heater to not re-light.
– In general, operating time will vary depending
on the heater setting and the supply cylinder
size. Up to 3 to 6 hours on a 1 lb. cylinder. Up
to 48 to 110 hours on a 20 lb. cylinder (based
on “HI” and “LO” settings). Run times of LP gas
can be significantly reduced when operating
continuously at temperatures below 20ºF. The
Master is designed to keep your 1lb cylinder
warm. When using a 20 lb. tank, you may
notice a decrease in BTU output.
– Your Master Portable Propane Heater is
equipped with a tip-over safety switch. When
moving the heater when lit, bumping heater,
setting it down or adjusting the heating angle,
the tip over switch may shut off heater. If this
happens, be sure the base is level and re-light.
– Condensation may build up on 1lb LP cylinder
and drip under heater. This may cause frost
on the bottom of the cylinder or may refreeze
under or around the heater. This is due to the
natural operation of small LP cylinders and is
normal.
– If heater shuts off, do not relight until you
provide fresh air. If heater keeps shutting off,
have the heater serviced. Keep burner and
control compartment clean.
Lighting & Operating Instructions for Use with
Disposable 1 Lb. Propane Cylinder
!
!

ENGLISH
9
OPERATION (CONT.)
– If pilot light does not light, release and depress
again. Repeat until pilot lights.
– After pilot lights, continue to hold Control Knob
down for 30–60 seconds until heating plaques
are lit and thermocouple is hot. Release knob.
Knob should return to fully extended position;
see Figure 2.
– To operate heater slightly depress knob and
gently turn to desired setting.
– For MH-18SNL-A To install the AAA battery for
the electronic ignitor, remove the ignitor top
housing counterclockwise by hand. Place the
AAA battery into the electronic ignitor bottom
housing with the positive “+” terminal button
facing up, see Figure 5. Reinstall the electronic
ignitor top housing clockwise.
– Turn Control Knob counterclockwise to
“PILOT” position and depress knob and hold
down; see Figure 4.
– Press ignition button from behind the heater
while still holding the Control Knob down until
pilot lights. If pilot does not light, repeat steps.
– After pilot lights, hold Control Knob down for
30–60 seconds until heating plaques are lit
and thermocouple is hot. Release knob. Knob
should return to fully extended position; see
Figure 2.
– To operate heater slightly depress knob and
gently turn to desired setting.
Lighting & Operating Instructions for Use
with Hose Connected to a Remote Cylinder,
Maximum Size 20 Lb.
The Propane (LP) cylinder must also be equipped
with the following:
– A collar to protect the gas valve.
– A shut-off valve terminating a LP cylinder valve
outlet as specified in the American National
Standard for Compressed Gas Cylinder Valve
Outlets and Inlets Connections.
– A safety relief valve having direct
communications with the vapor space of the
LP cylinder.
– Do not store a spare propane gas cylinder
under or near this appliance.
– Never fill the cylinder beyond 80% full.
– Place the dust cap on the cylinder valve outlet
whenever the cylinder is not in use. Only install
the type of dust cap on the cylinder valve
that is provided with the cylinder valve. Other
types of caps or plugs may result in leakage of
propane.
– The heater must operate on vapor withdrawal
from the operating cylinder.
– Heater must be in an upright position during
operation.
DANGER: NEVER bring a refillable propane
cylinder indoors. A fire or explosion can
occur causing property damage, serious
injury or death!
– Inspect the hose before each use. If there
is excessive abrasion or wear, or the hose is
cut, replace prior to use. Keep hose out of
pathways where people may trip over it or or
in areas where the hose may be subject to
accidental damage.
– Keep heater and cylinder in an upright position
during operation.
!
MH-18SLN-A Only
Coupling
Nut LP Cylinder
Valve
Figure 5
+
–

ENGLISH
10
– Before attaching propane make sure Control
Knob on heater is in “OFF” position; see Figure
4.
– Be sure to inspect all connections for leaks,
by using a 50/50 mixture of dish soap and
water on all connection. Any bubbles forming
indicate a leak.
– Follow operating instructions for your model.
Shut Down Instructions Using 1 Lb. Disposable
Cylinder
– To shut off heater, slightly push down and turn
Control Knob clockwise to “OFF” position.
CAUTION: After turning heater off, wire
guard will remain hot. Allow guard to cool
before handling and storing.
– Do not operate, store, or remove cylinder near
flammable items or ignition sources.
– A cylinder shall be stored outdoors in a well
ventilated area out of the reach of children.
A disconnected cylinder shall have dust caps
tightly installed and shall not be stored in a
building, garage, or any other enclosed area.
– LP-GAS CYLINDERS MUST BE
DISCONNECTED FROM HEATER WHEN NOT
IN USE!
Shut Down Instructions Using 20 Lb. Tank
– To shut off heater, shut off propane at supply
tank first, allow heater to use up propane in
supply line until heater shuts off, then slightly
push down and turn Control Knob clockwise to
“OFF” position.
CAUTION: After turning heater off, wire
guard will remain hot. Allow guard to cool
before handling and storing.
– Do not operate, store, or remove cylinder near
flammable items or ignition sources.
– Cylinders must be stored outdoors out of the
reach of children and must not be stored in a
building, garage, or any other enclosed area.
– LP-GAS CYLINDERS MUST BE
DISCONNECTED FROM HEATER WHEN NOT
IN USE!
DANGER: CARBON MONOXIDE
POISONING MAY LEAD TO DEATH!
Figure 2
Figure 3
Figure 4
!
!
!

ENGLISH
11
STORAGE / MAINTENANCE
Always disconnect the LP cylinder from the
regulator assembly and remove the LP cylinder
from the heater before putting the heater
into storage. If, for any reason, the heater is
to be stored in-doors, the heater MUST be
disconnected from the LP cylinder, and the
cylinder stored outdoors in a well-ventilated area,
out of the reach of children, and in accordance
with the Standard for Storage and Handling of
Liquefied Gasses, ANSI/NFPA 58 and Natural Gas
and Propane Installation Code, CSA B149.1- latest
edition. The plastic valve plug or valve cover
supplied with the LP cylinder must be reinstalled
on the valve to protect the fitting from damage.
NOTE: Repair of this heater should be done
by a qualified service person.
It is recommended that you save all the
packaging materials that came with your heater,
and re-package the heater using these materials
for safe storage.
Debris, dust, and dirt inside of the heater body
can affect the performance of your heater. This
debris can impair the heater's ability to draw air
for ventilation and combustion. Spiderwebs can
also appear during periods of inactivity.
Be sure to inspect the heater before each use to
look for any such obstructions. Be sure to keep
the air passageways (the slots below and above
the heater plaques), burner and combustion
areas clean. Wipe with a damp cloth or use
a vacuum cleaner to clean these areas. It is
suggested that you perform a thorough cleaning
at least once every 30 days of operation. You
may need to clean the heater more often if
conditions are naturally dirty.
Keep heater area clear and free from combustible
materials, gasoline, and other flammable vapors
and liquids.
Clean the ceramic plaques using compressed
air (max. 30 PSI) to prevent damage to plaques.
A yellow tip of the pilot flame indicates that the
burner area may be in need of cleaning. Inspect
and clean the pilot (mounted to bracket) by using
a vacuum or apply air pressure through the holes
in the pilot Figure 4.
WARNING: Never use sharp objects
to clean the pilot. Avoid damaging the
precisely calibrated pilot orifice that controls
the gas flow.
DANGER: Never store an LP cylinder inside
of a building or near any other gas or oil
burning applications.
CAUTION: Always be sure that the heater
has been allowed to cool for at least 30
minutes before attempting to store, service,
or perform maintenance.
VENTILATION
Heater shall be used only in a well-ventilated
space and shall not be used in a building, garage,
or any other enclosed area.
Heater may be used with shelter no more
inclusive than the following:
– With walls on all sides, but with no overhead
cover.
– Within a partial enclosure, which includes an
overhead cover and no more than two side
walls. These side walls may be parallel, as in a
breezeway, or at right angles to each other.
– Within a partial enclosure which includes an
overhead cover and three side walls, as long
as 30% or more of the horizontal periphery of
the enclosure is permanently open.
– Heater shall only be used in a well-ventilated
space and shall not be used in a building,
garage, or any other enclosed area.
!
!
!

ENGLISH
12
TROUBLESHOOTING GUIDE
PROBLEM POSSIBLE CAUSE SOLUTION
Unit will not create a spark.
1. Spark electrode broken.
2. Igniter wire may not be
attached to spark electrode.
3. Ground wire may not be
attached to frame.
4. Igniter wire damaged.
5. Piezo igniter defective or
broken.
6. MH-18SLN-A Only: Battery
needs to be replaced.
1. Replace electrode, part of
ODS (Oxygen Depletion
Sensor).
2. Attach spark electrode.
3. Attach ground to frame.
4. Replace igniter wire
5. Replace piezo, part of gas
valve assembly.
6. Replace with a new AAA
non-rechargeable battery.
Spark but not lighting.
1. No propane to heater.
2. “PILOT” position not properly
aligned.
3. Pilot is blocked from spider
web or dirt.
1. Check propane level, replace
disposable cylinder or connect
hose and turn on valve at
remote cylinder.
2. Be sure knob is in pilot
position.
3. Clean pilot, see STORAGE /
MAINTENANCE section.
Pilot will not stay lit.
1. Control knob not in “PILOT”
position.
2. New cylinders and tanks need
fuel line purged of air.
3. Pilot flame not surrounding
thermocouple.
4. Pilot flame too small to reach
thermocouple.
5. Tip-switch is activated.
6. Location is too windy.
1. Ensure knob is in Pilot Position.
2. Depress knob in pilot position
for 5 seconds before spark to
purge air from lines.
3. Clean pilot, see Maintenance
section.
4. Clean pilot; be sure enough
fresh air ventilation.
5. Be sure heater base is fairly
level.
6. Be sure heater is facing away
from wind or placed in a
protected area.
Pilot stays lit, but main burner
will not ignite.
1. Main burner orifice is blocked.
2. Location is too windy.
1. Clean heating plaques, see
Maintenance section.
2. Be sure heater is facing away
from wind or placed in a
protected area.
Main burner goes out
periodically.
1. Pilot is partially blocked.
2. Oxygen Depletion Sensor
(ODS) is sensing low oxygen
level.
3. Tip-over switch is activating.
4. Low gas pressure.
1. Clean pilot, see maintenance.
2. Provide minimum fresh air
opening of 9 square inches,
see section on Carbon
Monoxide.
3. Make sure unit base is fairly
level. Re-light.
4. Check fuel level. Replace LP
regulator if faulty.
Burner goes out when heat
angle is changed.
1. Tip-over switch is activated. 1. Make sure base is fairly level
and secure before tilting
heater. Tilt heater head slower,
avoid shaking heater.
Call Technical Services at 800.641.6996 or visit us at MasterIndustrialProducts.com for additional
troubleshooting information, videos and FAQs.

ENGLISH
13
EXPLODED VIEW (MH-09SLN-A)
PARTS LIST (MH-09SLN-A)
ITEM # DESCRIPTION MH09SLNA
1Gas Regulator GC-00374
2Gas Control Valve EL-00061
3Gas Control Valve Knob GC-00094
4ODS Pilot EL-00060
5Tilt Detent Spring GC-00143
6Rubber Foot GC-00167
7Tilt Detent GC-00170
8Tip Switch 50-017-0065
9Rear Cover Panel GC-00098
9
3
1
2
8
6
7
5
4
Call Technical Services at 800.641.6996 or visit us at
MasterIndustrialProducts.com to order spare parts.

ENGLISH
14
EXPLODED VIEW (MH-18SLN-A)
PARTS LIST (MH-18SLN-A)
ITEM # DESCRIPTION MH18SLNA
1Gas Regulator GC-00156
2Gas Control Valve EL-00062
3Electronic Igniter EL-00063
4Gas Control Valve Knob GC-00111
5Tilt Detent Spring GC-00143
6Rubber Foot GC-00167
7Tilt Detent GC-00170
8Tip Switch 50-017-0065
9ODS Pilot EL-00060
10 Rear Cover Panel GC-00118
9
8
7
5
2
1
4
3
10
Call Technical Services at 800.641.6996 or visit us at
MasterIndustrialProducts.com to order spare parts.

ENGLISH
15
LIMITED WARRANTY
Pinnacle Climate Technologies, Inc. warrants this product
to the original retail purchaser only, to be free from
defects in material and workmanship for a period of one
(1) year from the date of initial purchase. This product
must be properly installed, maintained and operated in
accordance with the instructions provided.
Pinnacle Climate Technologies, Inc. requires reasonable
proof of your date of purchase from an authorized retailer
or distributor. Therefore, you should keep your sales slip,
invoice, or cancelled check from the original purchase.
This Limited Warranty shall be limited to the repair or
replacement of parts, which prove defective under normal
use and service within the warranty period, and which
Pinnacle Climate Technologies, Inc. shall determine at its
reasonable discretion.
This warranty does not apply to products purchased for
rental use.
This Limited Warranty does not cover replacement of
belts or tightening of belts, or any failures or operating
difficulties due to normal wear and tear, accident, abuse,
misuse, alteration, misapplication, improper installation
or improper maintenance and service by you or any third
party. Failure to perform normal and routine maintenance
on the fan, shipping damage, damage related to insects,
birds, or animals of any kind, and damage due to weather
conditions are also not covered. In addition, the Limited
Warranty does not cover damage to the finish, such as
scratches, dents, discoloration, rust or other weather
damage, after purchase.
All transportation costs for the return of the damaged
product or parts will be the responsibility of the purchaser.
Upon receipt of damaged item, Pinnacle Climate
Technologies, Inc. will examine the item and determine
if defective.
Pinnacle Climate Technologies, Inc. will repair or
replace and return the item, freight pre-paid. If Pinnacle
Climate Technologies, Inc. finds the item to be in normal
operating condition, or not defective, the item will be
returned freight collect.
This Limited Warranty is in lieu of all other express
warranties. Pinnacle Climate Technologies, Inc. disclaims
all warranties for products that are purchased from sellers
other than authorized retailers or distributors.
AFTER THE PERIOD OF THE ONE (1) YEAR LIMITED
WARRANTY EXPIRES, Pinnacle Climate Technologies,
Inc. DISCLAIMS ANY AND ALL IMPLIED WARRANTIES,
INCLUDING WITHOUT LIMITATION THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR APPLICATION. FURTHER, Pinnacle
Climate Technologies, Inc. SHALL HAVE NO LIABILITY
WHATSOEVER TO PURCHASER OR ANY THIRD PARTY
FOR ANY SPECIAL, INDIRECT, PUNITIVE, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES. Pinnacle Climate
Technologies, Inc. assumes no responsibility for any
defects caused by third parties. This Limited Warranty
gives the purchaser specific legal rights; a purchaser
may have other rights depending upon where he or she
lives. Some states do not allow the exclusion or limitation
of special, incidental or consequential damages, or
limitations on how long a warranty lasts, so the above
exclusion and limitations may not apply to you.
Pinnacle Climate Technologies, Inc. does not authorize
any person or company to assume for it any other
obligation or liability in connection with the sale,
installation, use, removal, return, or replacement of its
equipment, and no such representations are binding on
Pinnacle Climate Technologies, Inc.
Always be sure to specify the model number and serial
number when making any claim with Pinnacle Climate
Technologies, Inc. For your convenience, use the space
provided below to list this information.
Model #: ________________________________________________
Serial #: _________________________________________________
Date of Purchase: _______________________________________

FRANÇAIS
16
AVERTISSEMENT : RISQUE D’INCENDIE OU D’EXPLOSION
Si une odeur de gaz se dégage :
1). N’essayez pas d’allumer l’appareil.
2). Éteignez toute flamme nue.
3). Débranchez l’alimentation en carburant.
4). Quittez les lieux immédiatement.
5). Laissez le gaz se dissiper pendant 5 minutes avant de rallumer
l’appareil.
N’entreposez pas et n’utilisez pas d’essence ou d’autres vapeurs
et liquides inflammables à proximité de ce gril ou de tout autre
appareil.
La non-observation de ces instructions peut provoquer un incendie
ou une explosion et entraîner des dommages matériels et des
blessures qui pourraient se révéler mortelles.
!
AVERTISSEMENT : La chaufferette doit recevoir une quantité
suffisante d’air de combustion et de ventilation, sinon elle
produira un excès de MONOXYDE DE CARBONE, un gaz
toxique inodore.
AVERTISSEMENT : L’EMPOISONNEMENT AU MONOXYDE DE
CARBONE PEUT ENTRAÎNER LA MORT OU DES BLESSURES
La chaufferette doit recevoir une quantité suffisante d’air de
combustion et de ventilation, sinon elle produira un excès de
MONOXYDE DE CARBONE, un gaz toxique inodore. Cette
chaufferette à gaz est non raccordée. Cette chaufferette utilise
l’air ambiant (oxygène) de l’espace où elle est utilisée. Une
quantité d’air suffisante pour la combustion et pour la ventilation
doit être fournie. Voir à la page 11.
!
!
MH-09SLN-A • MH-18SLN-A
Norme ANSI Z21.103-2017 : CHAUFFERETTE INTÉRIEURE/EXTÉRIEURE DE CAMPING
Le modèle MH-09SLN-A est homologué comme une chaufferette de
camping intérieure/extérieure en vertu de la norme ANSI Z21.103-
2017 uniquement pour les États-Unis, elle est homologuée comme une
chaufferette de camping extérieure en vertu de la norme ANSI Z21.63/
CSA 11.3 à la fois pour les États-Unis et le Canada.
Le modèle MH-18SLN-A est homologué comme une chaufferette de
camping intérieure/extérieure en vertu de la norme ANSI Z21.103-
2017 uniquement aux États-Unis, elle est homologuée comme une
CHAUFFERETTE EXTÉRIEURE INFRAROUGE AU GAZ POUR TERRASSE en
vertu de la norme ANSI Z83.26/CSA 2.371 à la fois pour les États-Unis et
le Canada.