Mr Heater Big Maxx User Manual
This is a genuine manufacturer-sourced component which is specially designed for Heat star or Mr Heater Kerosene Forced Air Heaters. This filter kit is specially designed for newer models with the round filter cover. This kit includes the inlet filter, outlet filter, gasket, fuel filter and the fuel filter screen. Heater Big Maxx Natural Gas Garage/Workshop Heater is quiet and vented for easily heating a 2- to 3-car garage. The low-profile design requires only 1in. Clearance from ceiling. Includes LP conversion kit for easy change over. Two angle brackets allow for positioning heater up and out of the way. Sep 27, 2019 Mr. Heater Big Maxx: MHU50NG (F260550) Ideal size for most workshops or garages — 1250 sq.ft. Follow maintenance care listed in the user manual if your unit requires it for prolonged use and safety. Always turn off your heater and unplug it (if optional) before closing up shop. Some practices to help catch a few more fish. By: Bernie Keefe.
This Channel is dedicated to teaching (you) our customers about all that Mr. Heater and BaseCamp have to offer. Stop by from time to time and see all our new. Heater Big Maxx 50,000 BTU Unit heater is the safe, quiet, & reliable way to turn your garage or barn into a year-round workspace. Comes as natural gas with a propane conversion kit included. Heats up to 1667 sq.ft. Requires 115-VAC power & can be vented vertically.
6
Mr. Heater Portable Propane Heater
Operating Instructions and Owner’s Manual
assembly venturi with (2) two screws.
8 Inspect and clean pilot (mounted to bracket) by using a
vacuum or apply air pressure through the holes in the
pilot indicated by the arrows in Figure 5.
warning: Never use needles, wires, or similar cylin-
drical objects to clean the pilot to avoid damaging the
calibrated orifice that controls the gas flow.
9 Apply air pressure (max. 30 psi.) into ceramic tile of
burner assembly and the venturi tube (ref. item #17) to
remove dust, lint or spider webs.
10 Reassemble main burner orifice holder onto the burner
assembly.
11 Reinstall burner assembly into the heater housing.
12 Reinstall fuel line and check for leaks.
13 Install heater back cover.
trOuBlesHOOting inFOrMatiOn:
If Spark electrode does not produce spark.
CHECK
• Spark electrode broken – replace ODS (Oxygen Depletion
Sensor).
• Igniter wire may not be attached to spark electrode.
• Igniter wire damaged – replace.
• Piezo igniter defective – replace control valve.
If Spark electrode produces spark but pilot does not light.
CHECK
• No gas to heater – install disposable cylinder or connect
hose and filter where required and turn on valve at remote
cylinder.
• “PILOT” position not properly aligned – turn gas control
knob to “PILOT” position and depress.
• Pilot is blocked from spider web or dirt – clean pilot, see
MAINTENANCE.
If Pilot flame does not stay lit when knob is released.
CHECK
• Control knob in “PILOT” position not completely depressed
or held in long enough to purge air from lines.
• Pilot flame not surrounding thermocouple – clean pilot, see
MAINTENANCE.
• Pilot Assembly defective – replace.
• Tip switch wires disconnected – connect.
If Main burner does not ignite.
CHECK
• Main burner orifice is blocked – clean burner, see MAINTE-
NANCE.
If Heater keeps shutting “OFF” during normal operation.
CHECK
• Pilot is blocked – clean pilot, see MAINTENANCE.
• Provide minimum fresh air opening of 9 square inches
(example 3” x 3” opening).
• Tip over switch activated from bumping heater. Re-light.
• Regulator defective - Replace regulator.
• Internal contamination - Replace control valve and regulator.
• Call Technical Services for additional information.
Maintenance:
Always keep the heater area clear and free from combus-
tible materials, gasoline and other flammable vapors and
liquids.
Keep the vent areas (slots in the bottom and the top at the
front and rear of
heater) clear at all
times.
Visually inspect the
pilot flame and
burner periodically
during use. The
pilot flame should
be blue in color
(not yellow) and
will extend beyond
the thermocouple.
The flame will surround the thermocouple just below the
tip, see Figure 5.
A slight yellow flame may occur where the pilot flame
and main burner flame meet. The burner should be bright
orange (with a slight blue color around the border, a red-
orange haze that is visible on the ceramic tile is acceptable)
and without a noticeable flame. A blue flame that rolls out
at the top of the ceramic tile indicates an accumulation of
dust, lint or spider webs inside the casing assembly and
main burner assembly. If the pilot is yellow or the burner
has a noticeable flame, cleaning may be required. Use the
following procedure to inspect the casing assembly and
main burner assembly.
It is necessary to periodically check the burner orifice and
burner venturi tube to make sure they are clear of insects/
nests or spider webs that may accumulate over time. A
clogged tube can lead to a fire.
1 Allow heater to thoroughly cool before performing any
maintenance.
2 Remove disposable 1 lb. cylinder from heater or turn
OFF gas supply at remote cylinder valve, and disconnect
hose from heater.
3 Remove (4) four screws that secure the rear cover to the
Heater.
4 Pivot cover outward from bottom. Release from 2 top
clips. Set aside.
5 Remove (4) four burner retaining screws and fuel line
from burner assembly. Remove burner assembly from
back of housing.
6 Inspect interior of housing for accumulation of dust, lint
or spider webs. If necessary, clean interior housing with
a vacuum cleaner or apply air pressure. Do not damage
any components within the housing assembly when you
are cleaning.
7 Inspect and clean main burner orifice (threaded into
orifice holder). Orifice holder is attached to the burner
Figure 5
Operating instructions and owner’s manual, Warning
OPERATING INSTRUCTIONS
AND OWNER’S MANUAL
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.
PORTABLE PROPANE HEATER FOR
RECREATIONAL AND COMMERCIAL USE
MH18B
Model #
01/10 78438US Rev. D
MR. HEATER, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 216-916-3000
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.
Mr Heater Big Maxx Installation Manual
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light appliance.
•
• Shut off gas to appliance.
— Service must be performed by a qualified service agency.
Adequate combustion and ventilation air must be provided. Refer to page 2.
START SERIAL #MHC-748000572690
LANGUAGES
Mr Heater Big Maxx Specs
ENGLISH
Pages E1 — E8
SPANISH
Pages S1 — S8