Dayton 3VG79B User Manual
Operating Instructions & Parts Manual
Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the product described.
Protect yourself and others by observing all safety information. Failure to comply with instructions could result in personal injury and/or
property damage! Retain instructions for future reference.
®
3VG79B
Dayton Portable Forced
Air Heater
Description
Dayton Model 3VG79B is a 200,000 Btu/Hr heater. This heater uses only Kerosene
or No. 1 fuel oil for combustion and electricity to run the motor. It is primarily
intended for indoor and outdoor temporary heating of well-ventilated buildings
under construction, alteration, or repair. It may be used in agricultural, industrial,
and commercial environments.
Figure 1 - Model 3VG79B
Unpacking
1. Remove all packing items supplied
with heater for shipment.
2. Remove all items from carton.
3. Check items for any shipping
damage. If heater is damaged,
promptly inform dealer where you
bought heater.
®
ARL LOGO
ELECTRICAL SPECIFICATIONS
Electrical Input (during normal run)
120 Volt/60 Hertz 3.6
GENERAL SPECIFICATIONS
Output Hot Air Output Fuel Tank Capacity Fuel Consumption
Rating Btu (CFM Approx) Fuel (U.S. Gallons) (U.S. Gallons/Hr.)
200,000 600 Kerosene or No. 1 fuel oil 13.5 1.4
Air Pump Heater Weight Heater Weight
Motor RPM Pressure (psi) (Pounds - with fuel) (Pounds - without fuel)
3400 6.2 77 66
Form 5S4068
Amperage
Printed in U.S.A.
03430
0700/256/VCPVP
G 004
®
Version B - For Reduction G016.J
Dayton Operating Instructions and Parts Manual
®
Dayton Portable
Forced Air Heater
3VG79B
Product Identification
Hot Air
Outlet
Lower
Shell
Fuel Cap
Side Cover
Ignition Control
Assembly (on inside
of side cover)
Upper Shell
Power Cord
Fan
Guard
Fuel
Tank
General Safety Information
Make certain you read and understand
all warnings. Keep these instructions for
reference. They are your guide to safe
and proper operation of this heater.
Safety information appears throughout
these instructions. Pay close attention to
them. Below are definitions for the safety
information listed throughout this manual.
Under this heading,
installation, operating, and maintenance procedures or
practices will be found that, if not
carefully followed, WILL result in IMMEDIATE serious personal injury or death.
Under this head-
ing, installation,
operating, and maintenance procedures or practices will be found that, if
not carefully followed, COULD result in
severe personal injury or death.
Under this heading,
installation, operating, and maintenance procedures or
practices will be found that, if not carefully
followed, MAY result in minor personal
injury, product or property damage.
Figure 2 - Model 3VG79B
Thermostat Knob
2
IMPORTANT: Every possible circumstance
that might involve a hazard cannot be
anticipated. The warnings in this manual
and on tags or decals affixed to the unit
are therefore not all-inclusive. If a
procedure, work method, or operating
technique not specifically recommended
by Dayton is used, you must make sure it
is safe for you and others. You should
also ensure that equipment will not be
damaged or made unsafe by the operating or maintenance method you choose.
Dayton Operating Instructions and Parts Manual
Model 3VG79B
Carbon monoxide
poisoning may lead
to death! Some people are more
affected by carbon monoxide than
others. Early signs of carbon monoxide
poisoning resemble the flu, with
headaches, dizziness, and/or nausea. If
you have these signs, the heater may
not be operating properly, or the areas
may not be sufficiently ventilated. Get
fresh air at once! Have heater serviced.
Improper use of
this heater can
cause serious injury or death from
burns, fire, explosion, electrical shock,
and carbon monoxide poisoning.
Make certain you read and understand
all warnings. Keep these instructions for
reference. They are your guide to safe
and proper operation of this heater.
• Use only
Kerosene or No. 1
fuel oil to avoid risk of fire or explosion. Never use gasoline, naphtha,
paint thinners, alcohol, or other highly
flammable fuels.
• Fueling
a) Personnel involved with fueling
shall be qualified and thoroughly
familiar with the manufacturer's
instructions and applicable federal,
state, and local regulations regarding the safe fueling of heating units.
b) Only the type of fuel specified on
the heater's data plate shall be used.
c) All flame, including the pilot
light, if any, shall be extinguished
and the heater allowed to cool, prior
to fueling.
d) During fueling, all fuel lines and
fuel-line connections shall be
inspected for leaks. Any leaks shall
be repaired prior to returning the
heater to service.
e) At no time shall more than one
day's supply of heater fuel be stored
inside a building in the vicinity of
the heater. Bulk fuel storage shall be
outside the structure.
f) All fuel storage shall be located a
minimum of 25 feet from heaters,
torches, welding equipment, and
similar sources of ignition (exception: the fuel reservoir integral with
the heater unit).
g) Whenever possible, fuel storage
shall be confined to areas where
floor penetrations do not permit fuel
to drip onto or be ignited by a fire at
lower elevation.
h) Fuel storage shall be in accordance with the federal, state, or
local authority having jurisdiction.
• Never use heater where gasoline,
paint thinner, or other highly
flammable vapors are present.
• Follow all local ordinances and codes
when using heater.
• Heaters used in the vicinity of
tarpaulins, canvas, or similar enclosure materials shall be located a safe
distance from such materials. The
recommended minimum safe distance is 10 feet. It is further recommended that these enclosure
materials be of a fire retardant
nature. These enclosure materials
shall be securely fastened to prevent
them from igniting or from upsetting
the heater due to wind action.
• Use only in well-vented areas.
Provide at least three square feet
of fresh, outside air for each
100,000 Btu/Hr of rating. This
heater produces carbon monoxide,
which is listed by the State of
California as a reproductive toxin
under Proposition 65.
• Use only in places free of flammable
vapors or high dust content.
• Use only with the electrical voltage
and frequency specified on model
plate.
• Use only a three-prong, grounded
extension cord.
• Minimum heater clearances from
combustibles:
Outlet: 8 Ft. Sides: 4 Ft.
Top: 4 Ft. Rear: 4 Ft.
• Locate heater on a stable and level
surface while hot or running or a fire
may occur.
• When moving or storing heater, keep
heater in a level position or fuel
spillage may occur.
• Keep children and animals away
from heater.
• Unplug heater when not in use.
• When used with thermostat, heater
may start anytime.
• Never use heater in living or sleeping areas.
• Never block air inlet (rear) or air
outlet (front) of heater.
• Never move, handle, refuel, or
service a hot, operating, or pluggedin heater.
• Never attach duct work to front or
rear of heater.
• Warning to New York City Residents
For Use Only At Construction Sites in
accordance with applicable NYC codes
under NYCFD certificate of approval
#4803, #4899, #4908, #4909, or #4934.
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Version B - For Reduction G016.J
Dayton Operating Instructions and Parts Manual
®
Dayton Portable
Forced Air Heater
3VG79B
Theory of Operation
THE FUEL SYSTEM
The air pump forces air through the air
line. The air is then pushed through the
nozzle. This air causes fuel to lift from the
tank. A fine mist of fuel is sprayed into the
combustion chamber.
THE AIR SYSTEM
The motor turns the fan. The fan pushes
air into and around the combustion
chamber. This air is heated and provides a
stream of clean, hot air.
THE IGNITION SYSTEM
The ignition control assembly provides
power to the ignitor. This ignites the fuel/
air mixture in the combustion chamber.
THE FLAME-OUT CONTROL SYSTEM
This system causes the heater to shut
down if the flame goes out.
Combustion Chamber
Ignitor
Fuels
Use only Kerosene
or No. 1 fuel oil to
avoid risk of fire or explosion. Never use
gasoline, naphtha, paint thinners,
alcohol, or other highly flammable fuels.
Do not use heavy fuels such as No. 2 fuel
oil or No. 2 Diesel. Using heavy fuels will
result in:
• clogged fuel filter and nozzle
• the need of nontoxic anti-icer in fuel
during very cold weather
IMPORTANT: Use a KEROSENE ONLY
container. Be sure storage container is
clean. Foreign matter such as rust, dirt, or
water will cause the flameout control to
shut down heater. Foreign matter may also
require you to clean fuel system often.
Motor
Fan
Air Pump
Air Intake
Filter
Assembly
This model is furnished with wheels and
handles. Wheels, handles, and the
mounting hardware are found in the
shipping carton.
TOOLS NEEDED
• Medium Phillips Screwdriver
• 3/8" Open or Adjustable Wrench
• Hammer
1. Slide axle through wheel support
frame. Install wheels on axle.
IMPORTANT: When installing wheels,
point extended hub of wheels toward
wheel support frame (See Figure 4).
Front
Hot Air
Outlet
Fuel
Tank
Flange
Handle Rear
Screw
Handle
Air
Inlet
Clean
Heated
Air Out
Fuel
Tank
Figure 3 - Cross Section Operational View
Nozzle
Air For Fuel System
Fuel
Filter
Air Line To
Burner
Air For Combustion
And Heating
Ignition Control
Assembly
Fuel
4
Cool
Air In
Air
Output
Filter
Wheel
Support
Frame
Nut
Extended
Axle
Cap Nut
Figure 4 - Wheel and Handle Assembly
Wheel
Hub
2. Place cap nuts on axle ends. Gently
tap with hammer to secure.
3. Place heater on wheel support frame.
Make sure air inlet end (rear) of
heater is over wheels. Line up holes
on fuel tank flange with holes on
wheel support frame.
Dayton Operating Instructions and Parts Manual
Model 3VG79B
Assembly (Continued) Maintenance
2. Fill fuel tank with Kerosene or No. 1
fuel oil.
4. Place handles on top of fuel tank
flange. Insert screws through handles,
fuel tank flange, and wheel support
frame. Attach nut finger tight after
inserting each screw.
5. After inserting all screws, tighten nuts
firmly.
Ventilation
Follow the mini-
mum fresh, outside
air ventilation requirements. If proper
fresh, outside air ventilation is not
provided, carbon monoxide poisoning
can occur. Provide proper fresh, outside
air ventilation before running heater.
FRESH AIR OPENING REQUIREMENTS
Square Feet
Heater Size Opening
200,000 Btu/Hr 6.0
Provide a fresh air opening at least three
square feet for each 100,000 Btu/Hr
rating. Provide extra fresh air if more
heaters are being used.
Example: A 200,000 Btu/Hr heater
requires one of the following:
• a two-car garage door (16 foot wide
opening) raised five inches
• a single-car garage door (9 foot wide
opening) raised eight inches
• two 30-inch windows raised fifteen
inches
Operation
Review and
understand the
warnings in the Safety Information
Section. They are needed to safely
operate this heater. Follow all local
codes when using this heater.
TO START HEATER
1. Follow all ventilation and safety
information.
3. Attach fuel cap.
4. Turn thermostat knob clockwise to the
HIGH position.
5. Plug power cord of heater into threeprong, grounded extension cord.
Extension cord must be at least six
feet long.
EXTENSION CORD WIRE SIZE
REQUIREMENTS
• 6 to 10 feet long, use 18 AWG
rated cord
• 11 to 100 feet long, use 16 AWG
rated cord
• 101 to 200 feet long, use 14 AWG
rated cord
6. Plug extension cord into standard 120
volt/60 hertz, three-hole, grounded
outlet. Note: Ignitor will preheat for
five seconds then heater will start.
7. Adjust thermostat knob to the desired
setting.
NOTE: A cold heater may affect the thermostat setting. This thermostat is a generalheating control. It is not intended for precise temperature control. Adjust thermostat
until heater cycles at the desired setting.
TO STOP HEATER
Unplug extension cord from outlet.
TO RESTART HEATER
1. Unplug extension cord from outlet and
wait 10 seconds (two minutes if heater
has been running).
2. Turn thermostat knob clockwise to the
HIGH position.
3. Plug extension cord into standard 120
volt/60 hertz, three-hole, grounded
outlet. Note: Ignitor will preheat for
five seconds then heater will start.
4. Adjust thermostat knob to the desired
setting.
plugged in, operating, or hot. Severe
burns and electrical shock can occur.
UPPER SHELL REMOVAL
1. Remove screws along each side and
top of heater using 5/16" nut-driver.
These screws attach upper and lower
shells together (See Figure 5).
2. Lift upper shell off.
3. Remove fan guard.
Upper
Shell
Figure 5 - Upper Shell Removal
FAN
IMPORTANT: Remove fan from motor
shaft before removing motor from heater.
The weight of the motor resting on the
fan could damage the fan pitch.
1. Remove upper shell (See Figure 5).
2. Use 1/8" Allen wrench to loosen
setscrew which holds fan to motor
shaft.
3. Slip fan off motor shaft.
4. Clean fan using soft cloth moistened
with Kerosene or solvent.
Never service
heater while it is
Screw
Fan
Guard
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Version B - For Reduction G016.J
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