SAFETY
WARNING:
YOUR SAFETY IS IMPORTANT TO YOU AND TO OTHERS,
SO PLEASE READ THESE INSTRUCTIONS BEFORE YOU
OPERATE THIS HEATER.
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in
serious injury, death or property damage. Be sure to read
and understand the installation, operation, and service in
this manual. Improper installation, adjustment, alteration,
service or maintenance can cause serious injury, death or
property damage.
WARNING:
gas appliances, and the products of combustion of such
fuel, can expose you to chemicals including benzene, which
is known to the state of California to cause cancer and
cause birth defects or other reproductive harm, for more
information go to www.P65Warnings.ca.gov
MHU200NG
V/A/H/Phase
120v / 6.3A / 60hZ / 1Ø
BTU Input
200,000 BTU
BTU Output
160,000 BTU
Efficiency %
CONTENTS
SAFETY.............................................................................2
INTRODUCTION...............................................................5
INSTALLATION.............................................................. ...6
START-UP........................................................................16
MAINTENANCE..............................................................20
FUEL CONVERSION INSTRUCTIONS................................22
TROUBLESHOOTING GUIDE............................................24
PARTS LIST ................................................................... 26
WARRANTY ................................................................ 28
LANGUAGES
ENGLISH .......................................................... 1 - 28
SPANISH .......................................................... 1 - 28
FRENCH .......................................................... 1 - 28
Fuels used in liquefied propane
120v / 6.3A / 60hZ / 1Ø
80%
Large Unit Heater
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 the instructions never
use the heater in spaces which do or may
contain volatile or airborne combustibles,
or products such as gasoline, solvents,
paint thinner, dust particles or unknown
chemicals.
WARNING:
YOU TO CHEMICALS INCLUDING LEAD AND LEAD
COMPOUNDS, WHICH ARE KNOWN TO THE STATE
OF CALIFORNIA TO CAUSE CANCER AND BIRTH
DEFECTS OR OTHER REPRODUCTIVE HARM. FOR MORE
INFORMATION VISIT WWW.P65WARNINGS.CA.GOV
MHU250NG
120v / 10A / 60hZ / 1Ø
250,000 BTU
200,000 BTU
80%
GENERAL INFORMATION
RETAIN THIS MANUAL FOR FUTURE REFERENCE.
FOR QUESTIONS, PROBLEMS, MISSING PARTS BEFORE
RETURNING TO RETAILER PLEASE CALL WITH MODEL NUMBER
AND SERIAL NUMBER OF HEATER:
1-800-251-0001
MONDAY-FRIDAY 8-5 EASTERN TIME
OR E-MAIL USING THE MR. HEATER WEBSITE:
WWW.MRHEATER.COM
In order to provide the best service possible Mr. Heater is
now giving you more ways to get in touch with us. Find
informational videos at:
Facebook: www.facebook.com/mrheaterproducts/
Twitter: https://twitter.com/MrHeater
2
Operating Instructions and Owner's Manual
THIS PRODUCT CAN EXPOSE
MHU300NG
120v / 10A / 60hZ / 1Ø
300,000 BTU
240,000 BTU
80%
MHU400NG
400,000 BTU
320,000 BTU
80%