MrHeater MH500LPT Assembly instructions

OPERATING INSTRUCTIONS
AND OWNER’S MANUAL
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 this tool. DO NOT use this
device in areas where gasoline or other liquids having flammable vapors are stored or used.
MH500LPT
Model #
Propane Torch
Model #MH500LPT & MH400PT
READ INSTRUCTIONS CAREFULLY:
READ AND FOLLOW ALL INSTRUCTIONS
SAVE THESE INSTRUCTIONS
MH400PT
Model: MH500LPT
Model: MH400PT

2
Mr. Heater | Propane Torch Operating Instructions and Owner’s Manual
CAUTION:
This device is intended for outdoor use only.
NEVER direct torch flame toward hose or gas tank.
DO NOT leave torch unattended while in operation.
DO NOT stand or prop the torch on the burner end while in operation.
Always ignite flame safely without exposing body, clothing or anything combustible
to ignited torch.
MH500LPT - Always ignite using striker provided with torch.
MH400PT - Ignite using a fireplace match or extended flame lighter..
DO NOT apply heat or flame to tank to check for leaks or to increase gas pressure.
DO NOT lift tank by the valve.
When not in use the gas should be turned off at the LP gas tank(s).
CAUTION – In daylight, torch flame is barely visible.
DO NOT place hand or body part in the path of the flame while lighting or operating torch.
This device is designed for vapor withdrawal from an LP gas tank(s) ONLY.
NOTE:
Place tank on level surface in an upright position.
Do not invert or lay tank on its side.
Gloves should be worn at all times when operating this device. Long sleeves, long
pants, and boots are recommended.
Have an ABC type fire extinguisher readily accessible to the job site.
THE STATE OF CALIFORNIA REQUIRES THE FOLLOWING WARNING:
WARNING: Combustion by-products produced when using this product contain
carbon monoxide, a chemical known to the State of California to cause cancer and birth
defects (or other reproductive harm).
This product contains chemicals known to the State of California to cause cancer and birth
defects or other reproductive harm.
• Hidden areas such as behind walls, ceilings, floors, soffit boards and other panels may contain
flammable materials that could be ignited by the heat gun when working in these locations.
The ignition of these materials may not be readily apparent and could result in property
damage and injury to persons. When working in these locations, keep the torch moving in a
back-and-forth motion. Lingering or pausing in one spot could ignite the panel or the material
behind it.
• Do not use this torch to remove paint

4
Mr. Heater | Propane Torch Operating Instructions and Owner’s Manual
1) Unpack all the components and inspect for any damage. If any damage is
discovered contact the delivery service or Mr. Heater immediately.
2) Connect the hose assembly to the handle assembly and tighten
counterclockwise.
NOTE: This is a left-handed thread connection.
Connection to the Supply Tank:
NOTE: The Propane gas tank used with this device should be a vapor withdrawal type with
no less than a 20 lb. capacity. It should also meet or exceed NFPA 58 “Standard for the
Storage and Handling of Liquefied Petroleum Gases”.
1) Inspect the nut/nipple (excess shut-off valve) connection of the hose assembly.
Check for any dents or damage. The o-ring must be present. If damage is found
or the o-ring is missing call Mr. Heater for the proper replacement parts.
2) Connect the excess shut-off valve end of the hose assembly to the shut-off valve
of a LP gas tank and tighten counterclockwise.
NOTE: If your LP gas tank does not have a shut-off valve, exchange the tank for
one with a shut-off valve.
OPERATING CHARACTERISTICS
Model BTU/Hour Operating Inlet Pressure
Temperature Range Range
MH500LPT 500,000* -10o F to 80o F 17 psi to 170 psi
MH400PT 400,000* -10o F to 80o F 17 psi to 170 psi
Assembly Instructions:
MH400PT Assembled MH500LPT Assembled
CAUTION:
This device is designed for vapor withdrawal from an LP gas tank(s) ONLY. Use of any other
gas may result in device failure or personal injury.
* Tank size and tank temperature can directly affect BTU output
READ ALL INSTRUCTIONS

5
Mr. Heater | Propane Torch Operating Instructions and Owner’s Manual
CAUTION:
DO NOT operate if any leaks are present. A leak may create a fire hazard.
DO NOT smoke around or expose supply tank(s) to open flames or sparks.
DO NOT apply heat or flame to tank to check for leaks. Excess heat may cause the
supply tank to rupture, possibly causing personal injury.
Lighting and Operating Instructions:
NOTE: The hose assembly is supplied with an excess flow control valve. Opening
the supply tank shut-off valve rapidly can cause the valve to close. If the excess flow pressure
valve closes, close the supply tank shut-off valve. Open torch adjusting valve to release any
residual gas left in the hose. Close torch-adjusting valve and wait 30 seconds. Slowly open
tank shut-off valve.
1) Make sure torch adjusting valve is closed.
2) Open supply tank shut-off valve.
3) With torch nozzle pointed away from any flammable material, open torch
adjusting valve 1/8th of a turn or until you can hear gas escaping.
4) MH500LPT - Ignite using supplied igniter.
MH400PT - Ignite using fireplace match or extended flame lighter.
5) Use the torch-adjusting valve to control the size and heat of flame.
USE: When using tool, do not direct flame directly into wind.
Do not allow barrel to come closer than 6” to the surface being heated.
Failure to do either of these things could cause flame outage.
IF YOU SMELL GAS:
- Shut off gas to the device.
- DO NOT try to light appliance.
-Extinguish any open flame.
-Check the device for leaks using soapy water.
- DO NOT attempt to relight the device until all leaks are repaired and there is no gas smell.
FOR YOUR SAFETY!
Leak Test:
1) Close torch adjusting valve (turn fully clockwise).
2) Slowly open the supply tank shut-off valve.
3) Test all connections for possible gas leaks using leak test solution.
A. Spray hose connections with a soapy solution. Bubbles around the fitting shows a leak.
4) If a leak occurs at:
• Torch-adjusting valve stem
- Tighten stem packing nut clockwise
- Slowly open supply tank shut-off valve and retest connection. Repeat if necessary
- If leak cannot be stopped by tightening the stem packing nut a new valve
assembly may be required. Contact Mr. Heater for the proper
replacement parts.
•Supply tank shut-off valve
- Close supply tank shut-off valve and retighten connection
counterclockwise. Slowly open supply tank shut-off valve and restart
connection. Repeat if necessary.

6
Mr. Heater | Propane Torch Operating Instructions and Owner’s Manual
Shut-Off Instructions:
1) Close torch adjusting valve.
2) Close supply tank shut-off valve.
3) Open the torch-adjusting valve briefly to release any residual gas pressure left in the hose.
CAUTION:
DO NOT smoke around or expose supply tank(s) to open flame or sparks.
MH500LPT - Always ignite using striker provided with torch.
MH400PT - Ignite using a fireplace match or extended flame lighter.
DO NOT place hand or any body part in the path of the flame while lighting or operating
torch. This can result in personal injury.
DO NOT use this torch to heat, mold or bend plastic sheets, moulding or tubing.
Maintenance:
Prior to each use:
1)Visually inspect all components of the device for damage and or wear. If the hose
shows excessive abrasion wear, or the hose is cut, it must be replaced prior to
operation. If damage is found, contact Mr. Heater for the proper replacement parts.
2) Visually inspect LP gas tank(s) for dents, damage to collar, damage to shut-off valve
or corroded foot ring. If any of these are present the LP gas tank(s) must be
replaced prior to operation.
3)Perform a leak test according to the leak test procedure described on page 5.
4)Ignite torch according to the lighting instructions described on page 5. Check
operation of the adjusting valve and the other components prior to proceeding.
Periodically:
1)Remove any debris or combustible material from the torch. The torch must be kept
clear and free from combustible materials.
2) The surface of the device should be cleaned with soap and water. Do not use
petroleum-based or flammable cleaner on any part of the device.
Disconnecting the Supply Tank:
1)Make sure supply tank valve is shut off.
2) Open torch adjusting valve briefly to release any residual gas pressure left in the hose.
Close adjusting valve when complete.
3)Disconnect the P.O.L. nut/nipple located at the end of the hose assembly from the
supply tank(s).
4)Replace the protective plastic cap and plug to the hose end and
supply tank(s) respectively.
CAUTION:
DO NOT smoke around or expose supply tank(s) to open flames or sparks.
Torch end of handle assembly will increase in temperature immediately after shutting off.

7
Mr. Heater | Propane Torch Operating Instructions and Owner’s Manual
Storage:
Never store a torch that is still hot. When the torch is stored indoors, the connection between
the LP gas tank(s) and the device must be disconnected and the tank(s) removed from the
device and stored outdoors in accordance with Chapter 5 of the “Standard for the Storage
and Handling of Liquefied Petroleum Gases” ANSI/NFPA 58.
NOTE:
· Storage temperature shall not exceed 120° F (49°C).
· Place tank on level surface in an upright position. Do not invert or lay tank on its side.
Safety Information:
Safety publications related to safe practice and use:
ANSI/UL 147 “Hand Held Torches for Fuel Gasses”
ANSI Z49.1 “Safety in Welding and Cutting”
NFPA 54 “National Fuel Gas Code”
NFPA 58 “Standard for the Storage and Handling of Liquefied Petroleum Gases”
CGA 2.29 “Hand Held Torches for Fuel Gasses”
CAUTION:
DO NOT smoke around or expose supply tank(s) to open flames or sparks.
CAUTION:
DO NOT smoke around or expose supply tank(s) to open flame or sparks.
The hose assembly shall be protected from traffic, crushing, and hot surfaces. This may
cause premature wear of the hose.
DO NOT lift tank by the valve. Lifting the tank by the valve may result in damage to
the valve.

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.
OPERATING INSTRUCTIONS
AND OWNER’S MANUAL MH500LPT
Model #
ANSI/UL 147-2009 CGA 2.29-1997
MH400PT
When it comes to quality hvac & refrigeration, Mr. Heater is the brand you can depend on.