Page 1
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
Page 2
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.
Page 3
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.
®
3
Version B - For Reduction G016.J
Page 4
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.
Page 5
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
®
5
Version B - For Reduction G016.J
Page 6
Dayton Operating Instructions and Parts Manual
®
Dayton Portable
Forced Air Heater
3VG79B
Maintenance (Continued)
5. Dry fan thoroughly.
6. Replace fan on motor shaft. Place fan
hub flush with end of motor shaft (See
Figure 6).
Fan
Motor
Flush
Motor
Shaft
Setscrew
Figure 6 - Fan Cross Section
7. Place setscrew on flat of shaft. Tighten
setscrew firmly (40-50 inch-pounds).
8. Replace fan guard and upper shell.
AIR OUTPUT, AIR INTAKE, AND LINT
FILTERS
1. Remove upper shell (See Figure 5, page 5).
2. Remove filter end cover screws using
5/16" nut-driver (See Figure 7).
3. Remove filter end cover.
4. Replace air output and lint filters.
5. Wash or replace air intake filter (See
Preventative Maintenance Schedule,
page 9).
6. Replace filter end cover.
7. Replace fan guard and upper shell.
IMPORTANT: Do not oil filters.
Air Intake Filter
Lint Filter
Air Output
Filter
Figure 7 - Air Output, Air Intake, and Lint
Filters
PUMP PRESSURE ADJUSTMENT
1. Remove pressure gauge plug from
filter end cover (See Figure 8).
2. Install accessory pressure gauge (Part
Number HA1180) (See Figure 9).
3. Start heater (See Operation, page 5).
Allow motor to reach full speed.
4. Adjust pressure to 6.2 psi. Turn relief
valve to right to increase pressure.
Turn relief valve to left to decrease
pressure (See Figure 9).
5. Stop heater. Remove pressure gauge.
Replace pressure gauge plug in filter
end cover.
Figure 8 - Pressure Gauge Plug Removal
Filter End Cover
Fan Guard
Relief Valve
Pressure
Gauge Plug
Pressure
Gauge
Figure 9 - Adjusting Pump Pressure
FUEL FILTER
1. Remove side cover screws using 5/16"
nut-driver.
2. Remove side cover (See Figure 10,
page 7).
3. Pull lower fuel line off fuel valve
fitting.
4. Carefully pry bushing, lower fuel line,
and fuel filter out of fuel tank.
5. Wash fuel filter with clean fuel and
replace in tank.
6. Attach lower fuel line to fuel valve
fitting.
7. Replace side cover.
FUEL VALVE
1. Remove side cover (See Figure 10), fan
guard, and upper shell (See Figure 5,
page 5) screws using 5/16" nut-driver.
2. Remove fan (See Fan, pages 5 and 6).
3. Pull lower fuel line off the fuel valve
fitting (See Figure 11, page 7).
High Voltage.
6
Page 7
Dayton Operating Instructions and Parts Manual
Model 3VG79B
Maintenance (Continued)
4. Disconnect red and white wires from
fuel valve (See Figure 11).
5. Using 1/4" nut driver remove 2 screws/
lockwashers holding fuel valve and
bracket to lower shell (See Figure 11).
Save these screws/lock washers.
6. Using 1/4" nut driver remove 2 screws
holding fuel valve to bracket. Save these
screws.
7. Attach new fuel valve to bracket with 2
screws.
8. Install new fuel valve and bracket on
lower shell with 2 screws/lockwashers.
9. Connect red and white wires (polarity
not important). Connect upper and
lower fuel lines to fuel valve.
10. Replace fan, fan guard, upper shell, and
side cover.
Bushing, Lower Fuel Line,
and Fuel Filter
Side
Cover
Figure 10 - Fuel Filter Removal
Fuel Valve
Fitting
Valve
Fittings
Fuel Valve
Electrical
Wires
Lower Fuel
Line
Figure 11 - Fuel Valve Replacement
Lock Washer
Screw
Bracket
Screw
IGNITOR
1. Remove upper shell and fan guard
(See Figure 5, page 5).
2. Remove fan (See pages 5 and 6).
3. Remove 4 side cover screws with a
5/16" nut driver. Remove side cover
(See Figure 10).
4. Disconnect ignitor wires (black) from
ignition control assembly (See Figure
12). Pull the ignitor wires up through
the hole in the lower shell.
5. Disconnect fuel line hose and air line
hose. Remove photocell from photocell bracket (See Figure 12).
6. Remove combustion chamber. Stand
combustion chamber on end with
nozzle adapter bracket on top (See
Figure 13, page 8).
7. Remove ignitor screw with a 1/4" nut
driver. Carefully remove ignitor from
nozzle adapter bracket.
Do not bend or
strike ignitor
element. Handle with care.
8. Carefully remove replacement ignitor
from styrofoam packing.
9. Carefully guide ignitor into opening in
nozzle adapter bracket. Do not strike
ignitor element. Attach ignitor to nozzle
adapter bracket with screw using a 1/4"
nut driver (See Figure 13, page 8).
Torque 8 to 15 in. lbs. Do not over
torque.
10. Replace combustion chamber.
11. Route the ignitor wires back down
through the hole in the lower shell.
Connect wires to the ignition control
assembly.
12. Replace side cover (See Figure 10).
13. Connect and route fuel line hose and
air line hose to nozzle assembly (See
Figure 14, page 8).
14. Replace photocell in photocell bracket.
15. Replace fan (See pages 5 and 6).
16. Replace fan guard and upper shell
(See pages 5 and 6).
Combustion
Chamber
Air
Line
Hose
Fuel
Line
Hose
Photocell
Bracket
Photocell
Assembly
Side Cover
Figure 12 - Disconnecting Ignitor Wires
from Ignition Control Assembly
Nozzle
Adapter
Bracket
Ignitor
Ignitor
Wires
Ignition
Control
Assembly
®
7
Version B - For Reduction G016.J
Page 8
Dayton Operating Instructions and Parts Manual
®
Dayton Portable
Forced Air Heater
3VG79B
Maintenance (Continued)
Ignitor Screw
Washer
Ignitor
Photocell
Bracket
Combustion
Chamber
Figure 13 - Ignitor Replacement
Element
Nozzle Adapter
Bracket Opening
NOZZLE ASSEMBLY
1. Remove combustion chamber and
ignitor by following steps 1 through 7
under Ignitor, page 7.
2. Carefully place the ignitor in a safe
location.
3. Remove two nozzle adapter bracket
screws (See Figure 14).
4. Place hex-shaped aluminum nozzle
adapter into vise (do not overtighten).
5. Carefully remove nozzle from nozzle
adapter using 5/8" socket wrench (See
Figure 15).
6. Blow compressed air through face of
nozzle. This will remove any debris in
nozzle.
7. Inspect nozzle seal for damage.
8. Replace nozzle into nozzle adapter
until nozzle seats. Tighten 80-110
inch-pounds.
9. Attach nozzle adapter bracket to
combustion chamber with two screws
removed in step 3.
10. Repeat steps 9 through 16 under
Ignitor, page 7.
Ignitor
Nozzle
Adapter
Bracket
Nozzle
Combustion
Chamber
Nozzle
Adapter
Bracket
Photocell
Bracket
Air Line
Hose
Figure 14 - Removing Air and Fuel Line
Hoses
Nozzle Face
Nozzle
Seal
Adapter
Bracket
Screw
Nozzle/
Adapter
Assembly
Fuel Line
Hose
Nozzle
Adapter
Nozzle
Nozzle
Adapter
Bracket
Figure 15 - Nozzle and Nozzle Adapter
PUMP ROTOR
(Refer to Figure 16)
(Procedure if rotor is binding)
1. Remove upper shell (See page 5).
2. Remove filter end cover screws using
5/16" nut-driver.
3. Remove filter end cover and air filters.
4. Remove pump plate screws using 5/16"
nut-driver.
5. Remove pump plate.
6. Remove rotor, insert, and blades.
7. Check for debris in pump. If debris is
found, blow out with compressed air.
Air Line
Fitting
Fuel Line
Fitting
8. Install insert and rotor.
9. Check gap on rotor. Adjust to
.003"/.004" if needed (See Figure 17).
NOTE: Rotate rotor one full turn to insure
the gap is .003"/.004" at tightest position.
Adjust if needed.
10. Install blades, pump plate, air filters,
and filter end cover.
11. Replace fan guard and upper shell.
12. Adjust pump pressure (See page 6).
NOTE: If rotor is still binding, proceed as
follows.
Blade
Pump Plate
Air Intake Filter
Filter End Cover
Insert
Rotor
Air Output Filter
Figure 16 - Rotor Location
Blade
Figure 17 - Gap Adjusting Screw Locations
Fan Guard
Gap Adjusting Screw
.003"/.004" Gap
Measured With
Feeler Gauge
Rotor
Gap Adjusting Screw
8
Page 9
Dayton Operating Instructions and Parts Manual
Model 3VG79B
Maintenance (Continued)
13. Perform steps 1 through 6, page 8.
14. Place fine grade sandpaper (600 grit)
on flat surface. Sand rotor lightly in
“figure 8” motion four times (See
Figure 18).
15. Reinstall insert and rotor.
16. Perform steps 10 through 12, page 8.
Sandpaper
Figure 18 - Sanding Rotor
IGNITION CONTROL ASSEMBLY
(Procedure for Replacing Fuse)
1. Unplug heater
High Voltage!
2. Remove side cover screws (4) using
5/16" nut-driver to expose ignition
control assembly.
3. Remove fuse cover (See Figure 19).
4. Remove fuse from fuse clips.
5. Replace fuse with fuse of the same
type and rating (GMA-10). Do not
substitute a fuse with a higher current
rating.
6. Replace fuse cover.
7. Replace side cover.
Fuse
Clips
Figure 19 - Replacing Fuse
Fuse
Cover
Fuse
STORING, TRANSPORTING, OR SHIPPING
NOTE: If shipping, transport companies
require fuel tanks to be empty.
1. Drain fuel tank.
NOTE: This model has a drain plug on
underside of fuel tank. Remove drain plug
to drain all fuel. Be sure all fuel is removed.
2. Replace drain plug.
3. If any debris is noted in old fuel, add 1
or 2 quarts of clean Kerosene to tank,
stir, and drain again. This will prevent
excess debris from clogging filters
during future use.
4. Replace fuel cap and drain plug.
Properly dispose of old and dirty fuel.
Check with local automotive service
stations that recycle oil.
5. If storing, store heater in dry place.
Make sure storage place is free of dust
and corrosive fumes.
IMPORTANT: Do not store Kerosene over
summer months for use during next
heating season. Using old fuel could
damage heater.
Preventative Maintenance Schedule
Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can
occur.
Item
How Often
Fuel tank Flush every 150-200 hours of operation or as needed See Storing, Transporting, or Shipping,
Air output and Replace every 500 hours of operation or once a year See Air Output, Air Intake, and Lint
lint filters Filters, page 6
Air intake filter Wash and dry with soap and water every 500 hours of See Air Output, Air Intake, and Lint
operation or as needed Filters, page 6
Fuel filter Clean twice a heating season or as needed See Fuel Filter, page 6
Ignitor No Maintenance Required
Fan Blades Clean every season or as needed See Fan, page 5
Motor Not required/permanently lubricated
9
How To
above
Version B - For Reduction G016.J
®
Page 10
Dayton Operating Instructions and Parts Manual
3VG79B
For Replacement Parts, call 1-800-323-0620
®
Dayton Portable
24 hours a day - 365 days a year
Forced Air Heater
Please provide following information:
-Model number
-Serial number (if any)
-Part description and number as shown in parts list
Address parts correspondence to:
Grainger Parts
P.O. Box 3074
1657 Shermer Road
Northbrook, IL 60065-3074 U.S.A.
Figure 20 - Motor and Pump Assembly
1
2
3
4
5
17
16
15
18
14
1
2
6
13
12
7
8
9
10
11
Figure 21 - Nozzle Assembly
8
7
3
4
10
11
6
1
4
6
7
9
5
5
Figure 22 - Fuel Valve Assembly
10
4
2
3
Page 11
Dayton Operating Instructions and Parts Manual
Model 3VG79B
Replacement Parts List - Motor and Pump Assembly - Figure 20
Ref. Part
No. Description Number Qty.
Ref. Part 2E510D 2E511D
Ref. Part
No. Description Number Qty. Qty.
No. Description Number Qty.
1 Motor 102001-27 1
2 Pump body 079975-03 1
3 #10-32 x 5/8" Screw *FHPF3-6C 2
4 Rotor insert **M22009 1
5 Pump rotor **M22456-2 1
6 Pump end cover M50545 1
7 Intake filter **M12179 1
8 Filter end cover M16545 1
9 1/4" Diameter steel ball **M8940 1
(*) Standard hardware item, available locally.
(**) See MAINTENANCE KITS, page 14.
10 Relief spring **M10993-1 1
11 Adjusting screw **M27694 1
12 Plug **M22997 1
13 #10-32 x 1" Screw *M12461-31 4
14 Output filter **M12244-1 1
15 Lint filter **M11637 1
16 Barb fitting M50820-02 1
17 Blade **M8643-2 4
18 #10-32 x 1.12" Screw *M12461-32 6
Replacement Parts List - Burner Head Assembly - Figure 21
Ref. Part
No. Description Number Qty.
1 Nozzle 100735-13 1
2 Nozzle washer M10659-1 2
3 Nozzle spring M10809-1 1
4 Nozzle sleeve M8882 1
5 Nozzle adapter 107273-01 1
6 Barb fitting M50820-02 2
Ref. Part 2E510D 2E511D
Ref. Part
No. Description Number Qty. Qty.
No. Description Number Qty.
7 Ignitor kit 102548-06 1
8 Belleville washer 103347-01 1
9 Screw, #6-32 x .88 M10908-75 1
10 Retaining ring 107272-01 1
11 Bracket 102336-03 1
Replacement Parts List - Fuel Valve Assembly - Figure 22
Ref. Part
No. Description Number Qty.
1 Fuel valve 107643-01 1
2 Fuel valve bracket 103129-01 1
3 8-32 x 1/4" Hex head screw *M12461-13 2
4 Fitting barb M50820-02 2
(*) Standard hardware item, available locally.
Ref. Part 2E510D 2E511D
Ref. Part
No. Description Number Qty. Qty.
No. Description Number Qty.
5 10-16 x 1/2" Hex sems
screw ext “B” *102432-01 2
6 Red wire assembly 107274-01 1
7 White wire assembly 107274-02 1
11
®
Version B - For Reduction G016.J
Page 12
Dayton Operating Instructions and Parts Manual
3VG79B
For Replacement Parts, call 1-800-323-0620
Dayton Portable
24 hours a day - 365 days a year
Please provide following information:
-Model number
Forced Air Heater
-Serial number (if any)
-Part description and number as shown in parts list
Address parts correspondence to:
Grainger Parts
P.O. Box 3074
1657 Shermer Road
Northbrook, IL 60065-3074 U.S.A.
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2
1
3
37
38
4
6
24
28
7
5
11
8
23
19
25
15
9
10
16
12
40
18
35
36
32
30
39
31
21
20
17
14
22
44
29
26
27
43
42
41
13
33
34
14
Figure 23 - Replacement Parts Illustration
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Page 13
Dayton Operating Instructions and Parts Manual
Model 3VG79B
Replacement Parts List
Ref. Part
No. Description Number Qty.
Ref. Part
No. Description Number Qty.
1 Upper shell 107353-04 1
2 #10-16 x 1/2" Screw *100647-01 8
3 Combustion chamber 098512-69 1
4 Photocell bracket 103154-05 1
5 #6-32 x 3/8" Screw *M10908-2 2
6 Photocell assembly M16656-24 1
7 Burner head assembly † 1
8 #10-16 x 1/2" Screw *M11084-27 2
9 Fan 102042-01 1
10 Motor and pump assembly † 1
11 Rubber bumper M50631 2
12 Motor mounting bracket 101206-01 1
13 Button plug 101695-01 1
14 Ignition control assembly 104068-02
15 1/4-20 Hex lock nut *NTC-4C 2
16 Fan guard 102756-01 1
17 Drain plug (includes O ring) M27417 1
18 Rubber bushing 103523-01 1
19 Fuel line M51345-03 1
20 Fuel filter **M51150-01 1
21 Fuel line tube M51345-04 1
22 Rubber bushing M10990-3 1
23 Airline M50814-03 1
24 Lower shell 107353-08 1
25 Bushing M30865-02 1
26 Bushing M50104-01 1
27 #10-16 x 1/2" Screw *M11084-27 6
28 Clip nut M11271-8 8
29 #8-32 x 3/8" Screw *M10908-14 1
30 Fuel tank 098513-105 1
31 Fuel cap (includes gasket) 097702-01 1
32 P.C. board support 102349-01 5
33 Strain relief bushing M11143-1 1
34 Power cord 098219-38 1
35 Side cover 107333-04AA 1
36 #10-16 x 1/2" Screw *M11084-27 4
37 Special screw 099230-01 2
38 #10-16 x 1/2" Screw *M11084-27 2
39 Fuel valve assembly † 1
40 Foam gasket 097785-04 2
41 Thermostat 097657-03 1
42 #6-32 x 1/4" Screw M10908-1 2
43 Thermostat knob 104905-01 1
44 Wire assembly 079010-35 1
(*) Standard hardware item, available locally.
(**) See MAINTENANCE KITS, page 14.
(†) Not available as an assembly, see pages 10 and 11.
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Dayton Operating Instructions and Parts Manual
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Dayton Portable
Forced Air Heater
3VG79B
Replacement Parts List for Handle and Wheel Group
Ref. Part
No. Description Number Qty.
1 Handles HA2204 2
2 #10-24 x 1
3 Wheel support frame M12831-3 1
4 #10-24 Hex nut *NTC-3C 8
5 Wheel 107426-01 1
6 Cap nut M28526 2
7 Axle M16801-2 1
∆ Thermostat decal 100621-06 1
∆ Tradename decal 097409-13 2
(*) Standard hardware item, available locally.
(∆) Not shown.
Accessories
Air gauge kit HA1180
Flame-out control/photocell tester HA1170
Fuel tank filter screen HA2210
Wiring Diagram
Photocell
Photocell
Ignition Control Assembly
Ignitor
Motor Return
AC Neutral (L2)
AC Hot (L1)
3
/4" Screw *M12345-33 8
Part Numbers
Blue
Photocell
Blue
White
Solenoid
White
Green
Valve
Black
Motor
White
Black
Thermostat
White
Green
Black
Power Plug
120V/60Hz
Maintenance Kits
Ignition control 104068-02
Ignitor 102548-06
Filter kit (M11637, M12179, M12244-1, M51150-01) HA3017
Nozzle 100735-13
Rotor/air pump kit (M22456-2, M22009, M8643-2) HA3005
Handle HA2204
Photocell M16656-24
Pump adjustment (M27694, M10993-1, M22997, HA3020
M8940)
1
2
3
5
6
Figure 24 - Handle and Wheel Assembly
4
7
Part Numbers
Motor
Ignitor
Red
Figure 25 - Wiring Diagram
Red
Black
Red
Ignitor
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Page 15
Dayton Operating Instructions and Parts Manual
Model 3VG79B
Troubleshooting Chart
Symptom
Motor does not start five seconds after
heater is plugged in
Motor starts and runs but heater does not
ignite
Never service heater while it is plugged in, operating, or hot.
Severe burns and electrical shock can occur.
Possible Cause(s)
1. No power to heater
2. Thermostat setting to low
High Voltage!
3. Bad electrical connection between motor
and ignition control assembly or ignition
control assembly and power cord
4. Blown fuse on ignition control assembly
5. Binding pump rotor
6. Defective ignition control assembly
7. Defective motor
1. No fuel in tank
2. Pump pressure incorrect
3. Dirty fuel filter
4. Obstruction in nozzle assembly
5. Water in fuel tank
Corrective Action
1. Check circuit breaker in electrical panel
2. Turn thermostat knob clockwise to a
higher setting
3. Check all electrical connections. See
Wiring Diagram, page 14
4. See Ignition Control Assembly, page 9
5. If fan does not turn freely, see Pump
Rotor, page 8
6. Replace ignition control assembly
7. Replace motor
1. Fill tank with kerosene
2. See Pump Pressure Adjustment, page 6
3. See Fuel Filter, page 7
4. See Nozzle Assembly, page 8
5. Drain and flush fuel tank with clean
kerosene. See Storing, Transporting, or
Shipping, page 9
Heater ignites but ignition control
assembly shuts heater off after a short
period of time
High Voltage!
6. Defective fuel valve
7. Bad electrical connection between
ignitor and ignition control assembly
8. Defective ignitor
9. Defective ignition control assembly
1. Pump pressure incorrect
2. Dirty air intake, air output, and/or lint
filter
3. Dirty fuel filter
4. Obstruction in nozzle assembly
5. Photocell assembly not properly
installed (not seeing the flame)
High Voltage!
6. Dirty photocell lens
7. Bad electrical connection between
photocell and ignition control assembly
8. Defective photocell
9. Defective ignition control assembly
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6. See Fuel Valve, page 7
7. Check electrical connections. See
Wiring Diagram, page 14
8. Replace ignitor, see page 7
9. Replace ignition control assembly
1. See Pump Pressure Adjustment, page 6
2. See Air Output, Air Intake, and Lint
Filters, page 6
3. See Fuel Filter, page 7
4. See Nozzle Assembly, page 8
5. Make sure photocell boot is properly
seated in bracket
6. Clean photocell lens
7. Check electrical connections. See
Wiring Diagram, page 14
8. Replace photocell
9. Replace ignition control assembly
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Version B - For Reduction G016.J
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Dayton Operating Instructions and Parts Manual
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3VG79B
Dayton Portable
Forced Air Heater
LIMITED WARRANTY
DAYTON ONE-YEAR LIMITED WARRANTY. Portable Air Forced heaters, Models covered in this manual, are warranted by Dayton
Electric Mfg. Co. (Dayton) to the original user against defects in workmanship or materials under normal use for one year after date of
purchase. Any part which is determined to be defective in material or workmanship and returned to an authorized service location, as
Dayton designates, shipping costs prepaid, will be, as the exclusive remedy, repaired or replaced at Dayton’s option. For limited warranty
claim procedures, see PROMPT DISPOSITION below. This limited warranty gives purchasers specific legal rights which vary from jurisdiction to jurisdiction.
LIMITATION OF LIABILITY. To the extent allowable under applicable law, Dayton’s liability for consequential and incidental damages is
expressly disclaimed. Dayton’s liability in all events is limited to and shall not exceed the purchase price paid.
WARRANTY DISCLAIMER. Dayton has made a diligent effort to provide product information and illustrate the products in this literature
accurately; however, such information and illustrations are for the sole purpose of identification, and do not express or imply a warranty
that the products are MERCHANTABLE, or FIT FOR A PARTICULAR PURPOSE, or that the products will necessarily conform to the illustrations or descriptions.
Except as provided below, no warranty or affirmation of fact, expressed or implied, other than as stated in the “LIMITED WARRANTY”
above is made or authorized by Dayton.
PRODUCT SUITABILITY. Many jurisdictions have codes and regulations governing sales, construction, installation, and/or use of products
for certain purposes, which may vary from those in neighboring areas. While Dayton attempts to assure that its products comply with
such codes, it cannot guarantee compliance, and cannot be responsible for how the product is installed or used. Before purchase and
use of a product, review the product applications, and all applicable national and local codes and regulations, and be sure that the
product, installation, and use will comply with them.
Certain aspects of disclaimers are not applicable to consumer products; e.g., (a) some jurisdictions do not allow the exclusion or limitation
of incidental or consequential damages, so the above limitation or exclusion may not apply to you; (b) also, some jurisdictions do not
allow a limitation on how long an implied warranty lasts, consequently the above limitation may not apply to you; and (c) by law, during
the period of this Limited Warranty, any implied warranties of implied merchantability or fitness for a particular purpose applicable to
consumer products purchased by consumers, may not be excluded or otherwise disclaimed.
PROMPT DISPOSITION. Dayton will make a good faith effort for prompt correction or other adjustment with respect to any product
which proves to be defective within limited warranty. For any product believed to be defective within limited warranty, first write or call
dealer from whom the product was purchased. Dealer will give additional directions. If unable to resolve satisfactorily, write to Dayton at
address below, giving dealer’s name, address, date, and number of dealer’s invoice, and describing the nature of the defect. Title and risk
of loss pass to buyer on delivery to common carrier. If product was damaged in transit to you, file claim with carrier.
Manufactured for Dayton Electric Mfg. Co., 5959 W. Howard St., Niles, Illinois 60714 U.S.A.
Manufactured for Dayton Electric Mfg. Co.
Niles, Illinois 60714 U.S.A.
107326 01
NOT A UPC
16
107326-01
Rev. D
12/00
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Version B - For Reduction G016.J
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