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Mr. Heater | Forced Air Propane Construction Heater

Operating Instructions and Owner’s Manual

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. MR. HEATER HOSES F273701 AND F273702 ARE SPECIFICALLY DESIGNED
FOR USE WITH THIS HEATER. USE OF OTHER HOSES MAY CAUSE THE HEATER TO
BECOME INOPERABLE.

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 • www.mrheater.com
Our office hours are 8:30 AM – 5:00 PM, EST, Monday through Friday.
Please include the model number, date of purchase, and description of problem in
all communication.

LIMITED WARRANTY

The company warrants this product to be free from imperfections in material or
workmanship, under normal and proper use in accordance with instructions of The
Company, for a period of one year from the date of delivery to the buyer. The Company, at
its option, will repair or replace products returned by the buyer to the factory,
transportation prepaid within said one year period and found by the Company to have
imperfections in material or workmanship.

If a part is damaged or missing, call our Technical Support Department at 800-251-0001.

Address any Warranty Claims to the Service Department, MR. HEATER INC., 4560 W. 160TH
ST., CLEVELAND, OHIO 44135. Include your name, address and telephone number and
include details concerning the claim. Also, supply us with the purchase date and the name
and address of the dealer from whom you purchased our product.

The foregoing is the full extent of the responsibility of the Company. There are no other
warranties, express or implied. Specifically there is no warranty of fitness for a particular
purpose and there is no warranty of merchantability. In no event shall the Company be
liable for delay caused by imperfections, for consequential damages, or for any charges of
the expense of any nature incurred without its written consent. The cost of repair or
replacement shall be the exclusive remedy for any breach of warranty. There is no warranty
against infringement of the like and no implied warranty arising from course of dealing or
usage of trade. This warranty will not apply to any product which has been repaired or
altered outside of the factory in any respect which in our judgment affects its condition or
operation.

Some states do not allow the exclusion or limitation of incidental or consequential
damages, so the above limitation or exclusion may not apply to you. This Warranty gives you
specific legal rights, and you may have other rights which vary from state to state.

OPERATING INSTRUCTIONS
AND OWNER’S MANUAL

MR. HEATER INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 216-881-5500
Mr. Heater is a registered trademarks of Enerco Group, Inc.
© 2003, Enerco/Mr. Heater. All rights reserved

ANSI Z83.7/CGA 2.14-2000

Mr. Heater Inc. reserves the right to make changes at any time, without notice or
obligation, in colors, specifications, accessories, materials and models.

MH55FAV
MH85FAV
MH125FAV

Model #

®

®

Summary of Contents for Heatstar MH85FAV

Page 1: ...lowed exactly a fire or explo sion 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...

Page 2: ... DAMAGE FROM HAZARDS OF FIRE EXPLOSION BURN ASPHYXIATION CARBON MONOX IDE POISONING AND OR ELECTRICAL 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 LABELS ETC CONTACT THE MANUFACTURER WARNING FIRE BURN INHALATION AND EXPLOSION HAZARD KEEP SOLID COMBUSTIBLES SUCH AS BUIL...

Page 3: ...ducts enter the heated space Even though this heater operates very close to 100 percent combustion efficiency it still produces small amounts of carbon monoxide Carbon monoxide called CO is toxic We can tolerate small amounts but not a lot CO can build up in a heated space and failure to provide adequate ventilation could result in death The symptoms of inadequate ventilation are headache dizzines...

Page 4: ...e is cut replace with hose assembly listed on parts list before using heater 8 For indoor use only Area must be well ventilated Figure 1 also see Operating Precautions 9 If at any time gas odor is detected IMMEDIATELY DISCONTINUE operation until the source of gas has been located and corrected Read enclosed Odor fade and Propane Sheet for additional information about detecting propane leaks 10 Ins...

Page 5: ...e person and the firefighters 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 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 determin...

Page 6: ...tting If the O ring is cut scuffed or otherwise damaged replace it with part number 6681 3 Turn off the gas at the LP gas supply cylinder s when the heater is not in use 4 When the heater is to be stored indoors the connection between the LP gas supply cylinder s and the heater must be disconnected and the cylinder s removed from the heater and stored out of doors and in accordance with Chapter 5 ...

Page 7: ...expected at the bottom of the chart 2 Move straight up to time of operation desired left side of chart 3 Read the cylinder size required All heaters should have full cylinders good air circulation no frost on cylinders MAXIMUM OPERATING TIME HOURS MAXIMUM OPERATING TIME HOURS MAXIMUM OPERATING TIME HOURS 55 000 BTU HR 16 1 kW 85 000 BTU HR 33 4 kW 125 000 BTU HR 49 1 kW AIR TEMPERATURE o F o C AIR...

Page 8: ...unction Block 1806 Orange 6 152mm Relay Thermocouple Junction Block MH55FAV MH85FAV MH125FAV WIRING CHART WIRING DIAGRAMS CONNECTION DIAGRAM MOTOR IGNITOR B SCHEMATIC DIAGRAM HIGH LIMIT SWITCH THERMOCOUPLE SPARK PLUG MOTOR IGNITOR RELAY GAS HIGH LIMIT SWITCH SPARK PLUG THERMOCOUPLE R or Y R or Y I1 I2 B or O B B W B RELAY B W B W G LINE CORD 115V 60HZ VALVE I1 I2 COLOR CODE LEGEND BLACK BLUE WHITE...

Page 9: ...1654 Motor Grille Assy 1 20 3676 Brkt Motor Mounting 1 21 1652 Motor Assy 1 22 6086 Fan 7 1 23 1729 Outer Cylinder Assy 1 24 7094 Clip Handle Mounting 2 REF ITEM DESCRIPTION QTY 25 7095 Handle 1 26 6225 Snap Bushing 5 8 1 27 6226 Universal Bushing 1 28 6224 Snap Bushing 1 2 1 29 6654 Thermocouple 13 Lg w J B 1 30 1082 Spark Plug 1 31 3037 Spark Plug Nut 2 32 6121 Ftg Male Elbow 1 33 3038 Orifice N...

Page 10: ... 1 17 3275 Spark Ignition 115V 1 18 1668 Fuel Tube Assembly 1 19 6133 Fitting Coupling 1 20 3787 Spacer TC Bracket 1 21 6127 Fitting Male Connector 1 22 7285 TE Valve 1 23 7404 Ball Valve Variable Rate 1 REF ITEM DESCRIPTION QTY 24 7405 Fitting Female Connector 1 25 3690 Control Panel Assembly 1 26 6223 Strain Relief Bushing 1 27 1036 Power Cord 1 28 6152 Hose Assembly 1 29 6257 Regulator 28 W C 1...

Page 11: ...41 Terminal Board 1 21 6065 Spacer Steel 1 22 1811 Relay Assembly 1 23 3275 Ignitor Hi Lo 801 Mini 1 24 6079 Spacer PC Standoff Nylon 3 25 6265 Fitting Elbow Street 2 26 7897 Ball Valve Variable Rate 1 REF ITEM DESCRIPTION QTY 27 7405 Fitting Female Connector 1 28 6227 Snap Bushing 1 1 4 Nylon 1 29 7158 Snap Bushing 3 4 Nylon 1 30 6133 Fitting Coupling 1 31 6127 Fitting Male Connector 1 32 7285 Va...

Page 12: ...4135 Include your name address and telephone number and include details concerning the claim Also supply us with the purchase date and the name and address of the dealer from whom you purchased our product The foregoing is the full extent of the responsibility of the Company There are no other warranties express or implied Specifically there is no warranty of fitness for a particular purpose and t...

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