Mr Heater Fan MH24T User Manual

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  
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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  
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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.  
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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  
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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  
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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  
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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  
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