
OPERATING INSTRUCTIONS AND OWNER’S MANUAL
MR. HEATER
MODEL
4000DF 6000DF 4000DF 6000DF
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.
HEATSTAR
BY ENERCO
MODEL
DIRECT FIRED
PORTABLE HEATER
WARNING:
— Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any
other appliance.
— Service must be performed by a qualified service agency.
This is an unvented portable heater. It uses air (oxygen) from the area in which it is used. Adequate
combustion and ventilation air must be provided. Refer to page 5.
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.
07/08 #50125ENERCO GROUP, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 800-251-0001

WARNING:
YOUR SAFETY IS IMPORTANT TO YOU AND TO OTHERS,
SO PLEASE READ THESE INSTRUCTIONS BEFORE YOU
OPERATE THIS HEATER.
GENERAL HAZARD WARNING:
FAILURE TO COMPLY WITH THE PRECAUTIONS AND
INSTRUCTIONS PROVIDED WITH THIS HEATER, CAN
RESULT IN DEATH, SERIOUS BODILY INJURY AND
PROPERTY LOSS OR DAMAGE FROM HAZARDS OF FIRE,
EXPLOSION, BURN, ASPHYXIATION, CARBON MONOXIDE 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:
NOT FOR HOME OR RECREATIONAL VEHICLE USE
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:
The State of California requires the following warning:
COMBUSTION BY-PRODUCTS PRODUCED WHEN US-
ING THIS PRODUCT CONTAIN CARBON MONOXIDE,
A CHEMICAL KNOWN TO THE STATE OF CALIFORNIA
TO CAUSE CANCER AND BIRTH DEFECTS (OR OTHER
REPRODUCTIVE HARM).
WARNING:
READ THE INSTRUCTIONS GIVEN IN THIS
MANUAL BEFORE USING THE APPLIANCE.
• DO NOT USE GASOLINE, NAPHTHA OR VOLATILE
FUELS.
• THE ELECTRICAL SYSTEM TO WHICH THE APPLIANCE
IS CONNECTED MUST COMPLY WITH ALL SAFETY
REGULATIONS IN FORCE. A RESIDUAL CURRENT
CIRCUIT BREAKER MUST BE PROVIDED ON THE MAIN
DISTRIBUTION BOARD.
• UNPLUG THE HEATER BEFORE ATTEMPTING ANY
SERVICE OR MAINTENANCE.
• ALWAYS CHECK THE POWER SUPPLY CABLE BEFORE
USE. IT MUST NOT BE BENT, CRUSHED, OR ANYWAY
DAMAGED.
• THE POWER SUPPLY CABLE MUST BE REPLACED ONLY
BY QUALIFIED PERSONNEL.
• ONLY USE AN ORIGINAL H07RN-F POWER CABLE
WITH WATERPROOF PLUG.
CONTENTS
WARNINGS .................................................................................. 2
SPECIFICATIONS ........................................................................... 3
OPERATION ................................................................................. 4
SAFETY DEVICES .......................................................................... 4
MAINTENANCE ............................................................................ 5
TROUBLESHOOTING ....................................................................6
WIRING DIAGRAMS ..................................................................... 7
PARTS LIST ................................................................................... 8
• DO NOT TOUCH THE EXHAUST GAS OUTLET. DANGER
OF BURNS!
ENERCO GROUP, INC. |Direct Fired Portable Heater Operating Instructions and Owner’s Manual
2

IMPORTANT
Before using the heater, read and understand all instructions and
follow them carefully. The manufacturer is not responsible for
damages to goods or persons due to improper use of units.
GENERAL RECOMMENDATIONS
The direct-red heater runs on diesel fuel. This direct combustion
heater exhausts hot air and the combustion products into
the room, while those with indirect combustion are fitted
with a flue to take the fumes away through the chimney.
Always follow local ordinances and codes when using this
heater:
• Read and follow this owner’s manual before using the
heater.
• Use only in places free of ammable vapors or high dust
content.
• Never use heater in immediate proximity of ammable
materials (the minimum distance must be 6 ft.).
• Make sure re ghting equipment is readily available.
• Make sure sufcient fresh outside air is provided according
to the heater requirements. Direct combustion heaters
should only be used in well vented areas in order to avoid
carbon monoxide poisoning.
• Never block air inlet (rear) or air outlet (front).
• In case of very low temperatures add kerosene to the
heating oil.
• Make sure heater is always under surveillance and keep
children and animals away from it;
• Before starting the heater always check free rotation of
ventilator fan.
• Unplug heater when not in use.
TECHNICAL SPECIFICATIONS
Heat input [kBTU/h] 400 610
Air flow [cfm] 2.500 2.800
Fuel Type Diesel/Kerosene/#1-2 Fuel Oil
Heat output [kBTU/h] - -
Fuel consumption
Phase 1 1
Power supply
Electric consumption
Nozzle [USgal/h] 2.00-30° S 3.00-80°S
Pump pressure [psi] 174 217
Max static pressure [in WC] - Recommended max. temp. in the air
duct
Adjustment of combustion air flap
Flue diameter [in] - Compulsory flue draft [in WC] - Tank capacity [gal] 27.7 35.7
Dimensions, L x W x H [in] 62.4x27.6x39 67.9x27.6x41.2
Net Weight [lb] 222 246
Voltage [V] 12 0 12 0
Frequency [Hz] 60 60
[gal/h] 12.83 4.46
[lb/h] 19.58 30.84
[W] 1,170 1,040
[A] 8.30 10.50
[°F] - -
[in] a=0.59 a=1.00
N° - -
MH 4000DF
HS 4000DF
MH 6000DF
HS 6000DF
Operating Instructions and Owner’s ManualENERCO GROUP, INC. |Direct Fired Portable Heater
3