Model #
OPERATING INSTRUCTIONS
AND OWNER’S MANUAL
MH24T
MH24TS
READ INSTRUCTIONS CAREFULLY: Read and follow all instructions. Place instructions in a safe
place for future reference. Do not allow anyone who has not read these instructions to assemble,
light, adjust or operate the heater.
GAS-FIRED INFRA-RED
PORTABLE HEATER
CYLINDER NOT INCLUDED
MODEL
MH24TS
MODEL
MH24T
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:
— Do not store or use gasoline or other flammable vapors and liquids in the 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 appli-
ance.
— WHAT TO DO IF YOU SMELL GAS
•
•
•
Do not try to light appliance.
Extinguish an
Shut off gas to appliance.
— Service must be performed by a qualified service agency.
— DO NOT LEAVE HEATER UNATTENDED OR IN OPERATION WHILE SLEEPING
Adequate combustion and ventilation air must be provided. Refer to page 3.
MR. HEATER INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 216-881-5500
06/10 Revision L3mh #73603
HOOK-UP INFORMATION
1.1 Heater model MH24T and MH24TS are packaged completely
assembled. Propane cylinders are not included with heater
models.
1.6 Make sure regulator knob is in “OFF” position by turning knob
clockwise to off.
1.7
1.2 Remove heater assembly from carton.
turning counterclockwise; then with a 7/8” open end wrench
tighten the POL fitting, hard.
1.3 Place the slots of the black collar mounting bracket assembly
onto the collar of the bulk tank (see Fig. 1)
1.8 Always connect the heater to bulk tank in the outdoors or in a
well ventilated area. NEVER connect heater to bulk tank near
an open flame.
1.9 Use only LP-gas cylinders constructed for use with propane only
CAUTION:
BE SURE THE LOCKING KNOB ON THE COLLAR MOUNT-
ING BRACKET ASSEMBLY IS OUTSIDE THE COLLAR ON
THE BULK TANK. Tighten the black knob against collar of
tank.
LP-gas cylinders of the U.S. Department of Transportation (DOT
Spec. 39).
1.10 Read pages 3 and 4 before lighting heater.
1.4
mounting bracket assembly with the three #6-32x1/2 screws
and #6-32 Keps hex nuts. Be sure screws and nuts are secure
and tight.
WARNING
Never touch heater while in operation to avoid injury.
Move heater by grasping the propane cylinder carefully.
1.5 Make sure tank valve is in “OFF” position (clockwise).
REFLECTOR
HOSE ASSEMBLY
REGULATOR
KNOB
TIGHTEN
LOCKING
KNOB
SPARKLITE IGNITER
POL NUT
LP CYLINDER
SAFETY
SHUT OFF VALVE
MODEL MH24T
COLLAR
MOUNTING BRACKET
TANK VALVE
Figure 1
MODEL MH24TS
Mr. Heater | Gas-Fired Infra-Red Portable Heater
Operating Instructions and Owner’s Manual
3
ODOR FADE WARNING
ODOR FADING - NO ODOR DETECTED
• Some people cannot smell well. Some people cannot smell
the odor of the man-made chemical added to propane (LP)
or natural gas. You must determine if you can smell the
odorant in these fuel gases.
• Learn to recognize the odor of propane (LP) gas and
natural gas. Local propane (LP) gas dealers will be more
than happy to give you a scratch and sniff pamphlet. Use it
to become familiar with the fuel gas odor.
• Smoking can decrease your ability to smell. Being around
an odor for a period of time can affect your sensitivity to
that particular odor. Odors present in animal confinement
buildings can mask fuel gas odor.
• The odorant in propane (LP) gas and natural gas is
colorless and the intensity of its odor can fade under
some circumstances.
WARNING
Asphyxiation Hazard
• Do not use this heater for heating human living
quarters.
• Do not use in unventilated areas.
•
be obstructed.
• Proper ventilation air must be provided to support
the combustion air requirements of the heater
being used.
•
manual, heater dataplate, or contact the factory to
determine combustion air ventilation requirements
of the heater.
• Lack of proper ventilation air will lead to improper
combustion.
• Improper combustion can lead to carbon monoxide
poisoning leading to serious injury or death.
Symptom of carbon monoxide poisoning can
include headaches dizziness and difficulty in
breathing.
• If there is an underground leak, the movement of gas
through the soil can filter the odorant.
• Propane (LP) gas odor may differ in intensity at different
levels. Since Propane (LP) gas is heavier than air, there may
be more odor at lower levels.
to the slightest gas odor. If you
• Always be sensitive
continue to detect any gas odor, no matter how small, treat
it as a serious leak. Immediately go into action as discussed
previously.
FUEL GAS ODOR
LP gas and natural gas have man-made odorants added
specifically for detection of fuel gas leaks.
If a gas leak occurs you should be able to smell the fuel
gas. Since Propane (LP) is heavier than air you should
smell for the gas odor low to the floor. ANY GAS ODOR
IS YOUR SIGNAL TO GO INTO IMMEDIATE ACTION!
ATTENTION - CRITICAL POINTS TO
REMEMBER!
• Propane (LP) gas has a distinctive odor. Learn to recognize
these odors. (Reference Fuel Gas Odor and Odor Fading
sections above.
• Even If you are not property trained in the service and
repair of the heater, ALWAYS be consciously aware of the
odors of propane (LP) gas and natural gas.
• If you have not been properly trained in repair and service
of propane (LP) gas then do not attempt to light heater,
perform service or repairs, or make any adjustments to the
heater on the propane (LP) gas fuel system.
• Do not take any action that could ignite the fuel gas. Do
not operate any electrical switches. Do not pull any power
supply or extension cords. Do not light matches or any
other source of flame. Do not use your telephone.
• Get everyone out of the building and away from the area
immediately.
• A periodic sniff test around the heater or at the heater’s
joints; i.e. hose, connections, etc., is a good safety practice
under any conditions. If you smell even a small amount of
gas, CONTACT YOUR FUEL GAS SUPPLIER IMMEDIATELY.
DO NOT WAIT!
• Close all propane (LP) gas tank or cylinder fuel supply
valves, or the main fuel supply valve located at the meter if
you use natural gas.
• Propane (LP) gas is heavier than air and may settle in low
areas. When you have reason to suspect a propane leak,
keep out of all low areas.
1.GENERAL INFORMATION
• Use your neighbor’s phone and call your fuel gas supplier
-enter the building or
area.
• Stay out of the building and away from the area until
declared safe by the firefighters and your fuel gas supplier.
•
check for escaped gas. Have them air out the building and
area before you return. Properly trained service people
must repair any leaks, check for further leakages, and then
relight the appliance for you.
A. The Mr. Heater MH24T and the MH24TS are high pressure
propane appliances and are designed to be connected to a bulk
propane tank. Every unit is tested during manufacturing and
shipped fully assembled except for bulk tank.
B. These heaters are equipped with two automatic Safety Shutoff
Valves. The gas flow will automatically stop to the heater burner
if that heater burner fails to operate for any reason.
C. Maximum safety and convenience have been built into the Hi-
Med-Lo-Off Control Valve/Regulator. The following table lists the
approximate BTU’s consumed and the operating hours you can
reasonably expect from bulk propane cylinders.
D. Model MH24TS is equipped with “Sparklite” igniters for
convenient heater lite-off.
Mr. Heater | Gas-Fired Infra-Red Portable Heater
Operating Instructions and Owner’s Manual
4
unsafe and dangerous. Return the heater to the dealer or the
address given on last page for repair or replacement.
Burners
Valve
BTU Input
Approximate Hours of Operation
Operating Position
11 Lb. Cylinder
20 Lb. Cylinder
J. FOr stOrage: The heater Hi-Med-Lo-Off regulating valve
should always be turned to “Off” when the heater is not in
use. Allow at least 15 minutes for cooling before handling and
storing. Detach propane cylinder from heater before storing. DO
NOT store propane cylinders near open flame or heat.
1
1
1
2
2
2
Hi
Med
Lo
Hi
Med
Lo
14,000
2,000
8,000
28,000
24,000
16,000
17
20
28
9
10
15
30
35
52
15
18
28
K. dO nOt transpOrt Or MOVe appliance wHile in
OperatiOn Or wHile Heater is attacHed. FOllOw
sHutdOwn and stOrage instructiOns tO transpOrt
Or MOVe tHis appliance.
Figure 2
3. VentilatiOn
2. FOr saFe OperatiOn
A. read instructiOns careFullY: Read and adhere to
these instructions. Do not allow anyone who has not read the
instructions to assemble, light, adjust or operate the heater.
a. warning: this heater is an unvented appliance and
Must be used OnlY in a well ventilated area. neVer
attempt to operate the heater inside any vehicle, camper or
enclosure.
B. FOr OutdOOr use OnlY. Any combustion process
requires and consumes oxygen, and will produce carbon
monoxide.
warning
KEEP THE HEATER OUT OF THE REACH OF CHILDREN
B. prOpane is VerY FlaMMaBle: In the event of a leak,
propane will accumulate and the possibility of a fire is present.
Propane gas is scented and its strong odor is readily detectable.
Never strike a match or bring any flame or create an electric
spark in an enclosure when you smell propane gas. Ventilate the
area thoroughly, move the heater outside, find and correct the
source of the leak before attempting to light any appliance. If
you are unsure of these instructions evacuate immediately and
call for help.
c. warning: provide ample ventilation. This heater con-
sumes air (oxygen). Do not use this heater in unventilated
structures to avoid endangering your life. Provide additional
ventilation for any additional fuel-burning appliances and
additional occupants.
4. MiniMuM clearance FrOM
cOMBustiBle Materials
a. When operating, the heater surfaces are extremely hot. Keep
sleeping bags, clothing, and all combustible materials clear of the
heater by at least the distances shown in figure 3.
c. gas leaKage: If the leak cannot be corrected, do not tamper
with the heater; follow the shut down instructions and return the
heater to the dealer or address given on last page.
Btu/Hr. rating
clearances tO cOMBustiBles
warning
nOrMal
Operating FROM C.L. OF
MODEL GAS
DO NOT USE THIS HEATER ON BULK TANKS OF GREATER
CAPACITY THAN 20 POUNDS LPG (50 POUNDS WATER
CAPACITY).
SIDES REAR
PROPANE prOcedure HTR. TO FLOOR
CEILING
NO.
MH24T 28,000
and
Vertical
32”
24" 24"
36”
MH24TS
d. leaK detectiOn: Before each use of the heater check all
fittings and connections with a soap solution to be sure there
are no leaks. Be sure the POL fitting is wrench (7/8”) tightened
into the On-Off valve on the propane cylinder. neVer, neVer
USE ANY FLAME FOR LEAK TEST.
Figure 3
B. warning: To avoid injury or property damage never allow
clothing, tents or other combustible material within 24” of the
heater. This heater must be located at least 32” above the floor
level when in use. Never operate the heater when sleeping.
e. cOnnecting Heater tO prOpane cYlinder: Always
connect the heater to the bulk cylinder in the outdoors or in
a well ventilated area. Use a 7/8” open end wrench. neVer
connect this heater to a cylinder near an open flame.
c. warning: Never direct the heat output of this heater toward
any propane tank within 20 feet.
F. use OF Heater: Always operate the heater with the propane
cylinder in an upright position on a level noncombustible surface.
neVer place the cylinder on its side when operating the heater.
5. asseMBlY prOcedure
a. Make sure the regulator knob on the heater is “off” by turning
g. attend Heater: Do not leave heater unattended while it is in
knob clockwise to the “OFF” position.
operation.
B. Carefully screw POL nut directly into bulk 20 lb. propane cylinder,
counterclockwise. REMEMBER – This is a left hand thread – see
Figure 1. Make sure the heater is in a vertical upright position
and directed away from the collar of the bulk tank. Use a 7/8”
open end wrench to tighten the POL fitting – left hand thread –
see Fig. 1.
H. alwaYs ligHt Heater witH MatcH Or “sparKlite”
igniter: neVer attempt to light the heater with a spark
lighter.
i. dO nOt taMper: Should the heater not perform properly,
such as little or no heat when operating in the “Hi” position, or
for any other reason, DO NOT ATTEMPT TO REPAIR OR TAMPER
with the heater. Any tampering could make the use of the heater
Mr. Heater | Gas-Fired Infra-Red Portable Heater
Operating Instructions and Owner’s Manual
5
F. If burner does not light within 30 seconds, turn the heater’s
6. LIGHTING INSTRUCTIONS
A.
minutes for gas to dissipate before attempting to relight.
connections with a soap solution. NEVER USE A MATCH TO
CHECK FOR LEAKS. Should a gas leak occur, do not attempt
to repair or use heater. Return the heater to your dealer or the
address given on back page.
G. NOTE: Should the orifice become clogged as indicated by low
volume of gas when operating on “Hi” with a full cylinder, or
should the heater fail to operate properly for any reason, return
the heater to the dealer or the address given on back page for
repair or replacement DO NOT ATTEMPT TO REPAIR OR TAMPER
WITH HEATER.
B. Fuel – This heater must be used only with a vapor withdrawal
LP gas bulk cylinder. THE BULK TANK MUST BE EQUIPPED WITH
A STANDARD POL VALVE.
H. Adjust heat output by turning knob to desired position.
I. COOKING: DO NOT USE THIS HEATER FOR COOKING.
WARNING
USE HD.5 PROPANE GAS ONLY. DO NOT USE ANY OTHER
TYPE FUEL. SEE YOUR PROPANE DEALER IF YOU HAVE
ANY QUESTIONS REGARDING FUEL.
7. SHUTDOWN AND STORAGE
INSTRUCTIONS
A. The bulk propane tank “on-off” valve should ALWAYS be
C. Turn the heater’s “Hi-Med-Lo-Off” regulator knob to “Med”
(counterclockwise).
completely turned “OFF” when the heater is not in use.
B. When shutting off the heater, turn the regulator knob on the
heater to “OFF” (clockwise). (See Figure 4 and 4a)
D. To light a burner, MH24T Model, place a lit match across the
4) THEN push in valve button on Safety Shutoff Valve. After the
burner is lit, continue to hold valve button in for 30 seconds,
then release the button slowly. CAUTION: DO NOT PUSH IN
VALVE BUTTON BEFORE INSERTING LIT MATCH. Repeat step “D”
for each burner.
C. CAUTION: After turning unit off, heater will remain extremely
hot. Allow at least 15 minutes for cooling before handling and
storing. Detach heater from bulk tank before handling and
D. HEATER STORAGE: Always remove the propane cylinder from
the heater when not in use. Always store propane cylinders in
a cool, well ventilated place away from any flame or heat and
in a location not used for habitation. DO NOT STORE PROPANE
TANK WITHIN 60 FT. OF OPEN FLAME OR HEAT.
E. To light a burner, MH24TS Model, push in valve button on
Safety Shutoff Valve and at the same time push down on
“Sparklite” Igniter button. Repeat push down of “Sparklite”
Igniter button until burner ignites. After burner is lit, continue
to hold valve button in for 30 seconds, then release the button
slowly. Repeat step “E” for each burner of the MH24TS Heater.
See Fig. 4a.
E. See Figure 6 for spare parts list.
Figure 4
Figure 4a
Mr. Heater | Gas-Fired Infra-Red Portable Heater
Operating Instructions and Owner’s Manual
6
Mr. Heater • Gas-Fired Infra-Red Portable Heater • Model #MH24T and #MH24TS
NOTE
WHE
MAT
(NOT
Figure 5
REPLACEMENT PARTS LIST FOR HEATER MODELS MH24T AND MH24TS
ITEM#
REF.#
DESCRIPTION
1
73610
2
4
6
7
F273117
F273164
F273606
73244P
73244PS
75602P
75607P
73938
Thermocouple Lead – 12” Lone
Grid Screen Assembly
Replacement Regulator with Soft Nose POL
Plenum/Reflector Assembly (MH24T Only)
Plenum/Reflector Assembly (MH24TS Only)
Wire Face Guard
Metal Ring
Collar Mounting Bracket
Hose Assembly (11” Long)
7A
8
9
10
11
12
13
14
15
16
73658
(Reference Only)
75613
73234
73233
73231
Locking Knob
Igniter/Sparklite
Spark Electrode/Bottom
Spark Electrode/Side
Figure 6
ALL WARRANTY CLAIMS REQUIRE PROOF OF PURCHASE
Mr. Heater | Gas-Fired Infra-Red Portable Heater
Operating Instructions and Owner’s Manual
7
Model #
OPERATING INSTRUCTIONS
AND OWNER’S MANUAL
MH24T
MH24TS
WARNING:
USE ONLY MANUFACTURER’S REPLACEMENT PARTS. USE OF ANY OTHER PARTS
COULD CAUSE INJURY OR DEATH. REPLACEMENT PARTS ARE ONLY AVAILABLE
DIRECT FROM THE FACTORY AND MUST BE INSTALLED BY A QUALIFIED SERVICE
AGENCY.
PARTS ORDERING INFORMATION:
PURCHASING: Accessories may be purchased at any Mr. Heater local dealer or
direct from the factory
FOR INFORMATION REGARDING SERVICE
Please call Toll-Free 800-251-0001
Please include the model number, date of purchase, and description of problem in
all communication.
LIMITED WARRANTY
Mr Heater, Inc. warrants its heaters and accessories to be free from defects in mate-
rial and workmanship for a period of 1 year from date of purchase. Mr Heater, Inc.
will repair or replace this product free of charge if it has been proven to be defective
within the 1-year period, and is returned at customer expense with proof of pur-
chase to Mr Heater, Inc. within the warranty period.
Mr. Heater Inc. reserves the right to make changes at any time, without notice or
obligation, in colors, specifications, accessories, materials and models.
ENERCO GROUP, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 216-916-3000
Mr. Heater and Portable Buddy are registered trademarks of Enerco Group, Inc.
© 2008, Enerco/Mr. Heater. All rights reserved
Mr. Heater | Gas-Fired Infra-Red Portable Heater
Operating Instructions and Owner’s Manual
8
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