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.
®
3VG81
Dayton Propane
Construction Heater
Description
Dayton model 3VG81 is a 150,000 Btu/Hr propane construction heater with built-in
thermostat. This heater uses propane gas for combustion. It is primarily intended for
temporary heating of buildings under construction, alteration, or repair. This heater
should only be used indoors but never in occupied dwellings. Products of combustion
are vented into the area being heated.
Unpacking
1. Remove all packing items applied to
heater for shipment. Keep plastic cover
caps (attached to inlet connector and
hose/regulator assembly) for storage.
2. Check all items for shipping damage. If
heater is damaged, promptly inform
dealer where you bought 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
Figure 1 – Model 3VG81
instructions should use or
service this heater.
If you need assistance or
heater information such
as an instructions
manual, labels, etc. contact the manufacturer.
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.
Not for
home or
recreational vehicle use.
The heater is designed for use as a construction heater under ANSI Z83.7/CSA 2.14. The
primary purpose of construction heaters is
to provide temporary heating of buildings
under construction, alteration or repair, and
to provide temporary emergency heat.
Properly used, the heater provides safe
economical heating. Products of combustion
are vented into the area being heated.
We cannot foresee every use which may be
made of our heaters. Check with your local
fire safety authority if you have questions
about heater use.
Other standards govern the use of fuel gases
and heat producing products for specific
uses. Your local authorities can advise you
about these.
Form 5S3928
Printed in U.S.A.
03430
1002/213/VCPVP
®
Version B - For Reduction G016.J
Page 2
Dayton Operating Instructions and Parts Manual3VG81
Temperature ControlBuilt-In Thermostat
Air Flow550 Cfm
Volts120 Vac 60 Hz I Phase
Amps2.2
Motor HP1/8
Motor RPM3,450
Dimensions36
Heater Weight27 Lb
Shipping Weight35 Lb
1
/4"L x 20"H x 141/2"W
Product Identification
Handle
Hot Air Outlet
(Front)
Upper Shell
Fan Guard
General Safety Information
IMPORT ANT: 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 heading,
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.
Lower Shell
On/Off Switch
Inlet Connector
Figure 2 - Product Identification
Power
Cord
Thermostat
Knob
Hose/Regulator
Assembly
2
IMPORTANT: Not every possible circum-
stance that might involve a hazard can 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 3VG81
General Safety Information
(Continued)
This product
contains and/or
generates chemicals know to the State
of California to cause cancer or birth
defects, or other reproductive harm.
Carbon monoxide
poisoning: 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. Get fresh air at once! Have
heater serviced.
Propane Gas: Propane gas is odorless.
An odor-making agent is added to
propane gas. The odor helps you detect
a propane gas leak. However, the odor
added to propane gas can fade.
Propane gas may be present even
though no odor exists.
Make certain you
read and understand all Warnings. Keep this manual
for reference. It is your guide to safe
and proper operation of this heater.
• This product has been approved for
use in the Commonwealth of Massachusetts.
• Install and use heater with care.
Follow all local ordinances and
codes. In the absence of local
ordinances and codes, refer to the
National Fuel Gas Code handbook
NFPA54/ANSI Z223.1 and the Natural
Gas Installation Code, CAN/CGA
B149.2. This instructs on the safe
storage and handling of flammable
gases.
• Use only the electrical voltage and
frequency specified on model plate.
The electrical connections and
grounding of the heater shall follow
the National Electric Code, ANSI/
NFPA 70 or the Canadian Electrical
Code, Part 1.
• Provide adequate ventilation. Before
using heater, provide at least a
three-square-foot opening of fresh,
outside air for each 100,000 Btu/Hr of
rating.
• For indoor use only. Do not use
heater outdoors.
• Keep heater away from strong
drafts, wind, water spray, rain, or
dripping water.
• Do not use heater in occupied
dwellings or in living or sleeping
quarters.
• Keep appliance area clear and free
from combustible materials, gasoline, paint thinner, and other flammable vapors and liquids. Do not use
heater in areas with high dust
content.
• This heater is equipped with a
thermostat. Heater may start at
anytime.
• Check heater for damage before each
use. Do not use a damaged heater.
• Use only propane gas set up for
vapor withdrawal.
• Keep propane tank(s) below 100° F.
• Keep heater at least six feet from
propane tank(s). Do not point heater
at propane tank(s) within 20 feet.
• Do not use heater below ground
level.
• Electrical grounding instructions —
This appliance is equipped with a
three-prong (grounding) plug for
your protection against shock hazard
and should be plugged directly into
a properly grounded three-prong
receptacle or extension cord.
• Use only the hose and factory preset
regulator provided with the heater.
• Inspect hose before each use of
heater. If highly worn or cut, replace
before using heater. Use the replacement hose assembly specified in this
manual.
• Minimum heater clearances from
combustibles:
Outlet: 8 Ft.Sides: 2 Ft.
Top: 6 Ft.Rear: 2 Ft.
• Locate heater on stable and level
surface if heater is hot or running.
• Keep children and animals away
from heater.
• Turn off propane supply and unplug
heater when not in use.
• Never block air inlet (rear) or air
outlet (front) of heater.
• Never move, handle, or service a hot,
operating, or plugged-in heater.
Severe burns may result. You must
wait 20 minutes after turning heater
off.
• To prevent injury, wear gloves when
handling heater.
• Do not alter heater. Keep heater in
its original state.
• Do not use heater if altered.
• Never attach duct work to front or
rear of heater.
• Use only original replacement parts.
This heater must use design-specific
parts. Do not substitute or use
generic parts. Improper replacement
parts could cause serious or fatal
injuries.
®
3
Version B - For Reduction G016.J
Page 4
Dayton Operating Instructions and Parts Manual3VG81
®
Dayton Propane
Construction Heater
Theory of Operation
THE FUEL SYSTEM
The hose/regulator assembly attaches to
the propane gas supply. The propane gas
moves through the solenoid valve and out
the nozzle.
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 direct spark ignitor (DSI) sends voltage
to the ignitor, which ignites the fuel and
air mixture.
THE SAFETY CONTROL SYSTEM
This system causes the heater to shut
down if the flame goes out.
TEMPERATURE CONTROL SYSTEM
Built-in thermostat allows heater to cycle
on and off to maintain consistent area
temperature.
Clean
Heated
Air Out
(Front)
Combustion
Chamber
Figure 3 - Cross Section Operational View
Nozzle
Ignitor
Air For Combustion
Air for Combustion and
And Heating
Heating
Propane Supply
Propane gas and propane tank(s) must be
provided by the user.
Use this heater only with a propane vapor
withdrawal supply system. See Chapter 5
of the Standard for Storage and Handling
of Liquefied Petroleum Gas, ANSI/NFPA 58.
The local library or fire department will
have this booklet.
The amount of propane gas ready for use
from propane tanks varies. Two factors
determine this amount:
1. The amount of propane gas in tank(s)
2. The temperature of tank(s)
The chart below shows the number of 100
pound tanks needed to run this heater.
Do not operate this product with any tank
smaller than 100 pounds.
DSI
Fan
Solenoid
Valve
Motor
On/Off Switch
Fuel
Fuel
Cool
Air
In
Power
Cord
Hose/
Regulator
Assembly
Temperature (ºF)Number of
at Tank100 Lb. Tanks
32°2
20°2
10°3
0°3
-10°Use larger tank
-20°Use larger tank
Less gas is vaporized at lower temperatures. You may need two or more 100
pound tanks or one larger tank in colder
weather. Your local propane gas dealer will
help you select the proper supply system.
The minimum surrounding-air temperature
rating for each heater is -20°F.
Installation
Review and
understand the
warnings in the Safety Information
Section, pages 2 and 3. They are
needed to safely operate this heater.
Follow all local codes when using this
heater.
Test all gas piping
and connections
for leaks after installing or servicing.
Never use an open flame to check for a
leak. Apply a mixture of liquid soap
and water to all joints. Bubbles
forming show a leak. Correct all leaks
at once.
1. Provide propane supply system (See
Propane Supply).
2. Connect POL fitting on hose/regulator
assembly to propane tank(s). Turn POL
fitting counterclockwise into threads
on tank. Tighten firmly using wrench.
Tighten regulator with vent pointing
down.
3. Connect hose to inlet connector.
Tighten firmly using a wrench.
4
Page 5
Dayton Operating Instructions and Parts Manual
Model 3VG81
Installation (Continued)
IMPORTANT: Extra hose or piping may be
used if needed. Install extra hose or piping
between hose/regulator assembly and
propane tank. You must use the regulator
supplied with heater.
4. Open propane supply valve on propane
tank(s) slowly.
NOTE: If not opened slowly, excess-flow
check valve on propane tank will stop gas
flow. If this happens, close propane supply
valve and open again slowly.
5. Check all connections for leaks.
Never use an open
a leak. Apply a mixture of liquid soap
and water to all joints. Bubbles
forming show a leak. Correct all leaks
at once.
6. Close propane supply valve.
Supply
Valve
Propane
Tank
Figure 4 - Regulator With Vent Pointing
Down
Regulator
flame to check for
Hose
Vent
(pointing
POL
Fitting
Inlet Connector
down)
Hose
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.
Provide a fresh air opening of at least
three square feet for each 100,000 Btu/Hr
rating. Provide extra fresh air if more
heaters are being used.
Operation
Review and
understand the
warnings in the Safety Information
Section, pages 2 and 3. They are needed
to safely operate this heater. Follow all
local codes when using this heater.
TO START HEATER
1. Follow all installation, ventilation and
safety information.
2. Locate heater on stable and level
surface. Make sure strong drafts do
not blow into front or rear of heater.
3. Plug power cord of heater into a threeprong, grounded extension cord.
Extension cord must be at least six feet
long. Extension cord must be UL listed.
Extension Cord Size Requirement
Up to 50 feet long, use 18 AWG rated
cord.
51 to 100 feet long, use 16 AWG
rated cord.
101 to 200 feet long, use 14 AWG
rated cord.
4. Plug extension cord into a 120 volt/60
hertz, three-hole, grounded outlet.
5. Open propane supply valve on propane
tank(s) slowly.
NOTE: If not opened slowly, excess-flow
check valve on propane tank will stop gas
flow. If this happens, close propane supply
valve and open again slowly.
6. Turn thermostat control knob fully
counterclockwise to the "COOLER"
position. Turn ON/OFF switch to the
ON position. Turn thermostat control
knob slowly clockwise until electric
motor and fan begin to run. Heater
will start in approximately 3 seconds.
Adjust thermostat control knob to
WARMER or COOLER setting as
needed.
NOTE: If heater does not start after 3
seconds, the ignition control will automatically attempt to start heater one time. If
heater fails to start on this attempt, the
safety control will "lock out" and no
further automatic restarts will be attempted. This could occur if air remains in
fuel line. If heater fails to start on this
attempt, turn ON/OFF switch to OFF
position. Wait ten seconds for safety
control to reset, then turn ON/OFF switch
back to ON position and try to start heater
again.
7. Thermostat Operation Only: During
normal thermostat operation, heater
will cycle off when air temperature
rises to thermostat setting. When air
temperature drops sufficiently below
thermostat setting, the electric motor
and fan will begin to run. After 15 to
60 seconds, heater burner should
automatically ignite and provide heat
to maintain temperature setting.
Figure 5 - Hose and Inlet Connector
®
5
Version B - For Reduction G016.J
Page 6
Dayton Operating Instructions and Parts Manual3VG81
®
Dayton Propane
Construction Heater
Operation (Continued)
TO STOP HEATER
1. Tightly close propane supply valve on
propane tank(s).
2. Wait a few seconds. Heater will burn
gas left in supply hoses.
3. Turn on/off switch to the OFF position.
4. Unplug heater.
Storage
Disconnect heater
from propane
supply tank(s).
1. Store propane tank(s) in safe manner.
See Chapter 5 of Standard for Storage
and Handling of Liquefied Petroleum
Gases, ANSI/NFPA 58. Follow all local
codes.
2. Place plastic cover caps over brass
fittings on inlet connector and
hose/regulator assembly.
3. Store in dry, clean, and safe place. Do
not store hose/regulator assembly
inside heater combustion chamber.
4. When taking heater out of storage,
always check inside of heater. Insects
and small animals may place foreign
objects in heater. Keep inside of heater
free from combustible and foreign
objects.
1. Keep heater clean. Clean heater
annually or as needed to remove dust
and debris. If heater is dirty or dusty,
clean heater with a damp cloth.
2. Inspect heater before each use. Check
connections for leaks. Apply mixture of
liquid soap and water to connections.
Bubbles forming show a leak. Correct
all leaks at once.
3. Inspect hose/regulator assembly before
each use. If hose is highly worn or cut,
replace.
4. Have heater inspected yearly by a
qualified service agency.
5. Keep inside of heater free from
combustible and foreign objects.
Service Procedures
Never service
heater while it is
plugged in, connected to propane
supply, operating, or hot. Severe burns
and electrical shock can occur.
UPPER SHELL REMOVAL
1. Remove screws along each side of
heater. These screws attach upper and
lower shells together.
2. Lift or slide upper shell off.
3. Remove fan guard.
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 Upper Shell
Removal).
2. Use hex 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.
5. Dry fan thoroughly.
6. Replace fan on motor shaft. Make sure
setscrew is touching back of flat
surface on motor shaft (See Figure 8).
7. Place setscrew on flat of shaft. Tighten
setscrew firmly (40-50 inch-pounds).
8. Replace fan guard and upper shell.
Setscrew
Fan
Motor shaft
Figure 7 - Fan, Motor Shaft, and Setscrew
Location
Maintenance
Never service
heater while it is
plugged in, connected to propane
supply, operating, or hot. Severe burns
and electrical shock can occur.
Figure 6 - Upper Shell Removal
6
Hub
Setscrew
Figure 8 - Fan Cross Section
Fan
Motor Shaft
Page 7
Dayton Operating Instructions and Parts Manual
Orange
Green
Automatic
Ignition
System
G V VR ACR AC
Position of
Leads May
Vary
Blue
Blue
White
White
Black
Blue
Insulated
Connector
Solenoid
Valve
Black
Motor
Power Cord
120 VAC
On/Off
Switch
Black
High Temp
Switch
Black
Thermostat
White
Green
Green
T
Black
Black
Black
Model 3VG81
Operation (Continued)
IGNITOR
Make sure gap between ignitor electrode
and burner nozzle is .13 min./.15"max.
Access ignitor electrode from inside
combustion chamber. No other maintenance is needed for ignitor.
generic parts. Improper replacement parts could cause serious or fatal injuries. This will also protect
( ) Not shown.
(*) Standard hardware item, available locally.
®
9
Version B - For Reduction G016.J
Page 10
Dayton Operating Instructions and Parts Manual3VG81
®
Dayton Propane
Construction Heater
Repair Parts List (Continued)
ReferencePart No. For
NumberDescriptionModel 3VG81Quantity
41* #10-32 x 1/4" ScrewM12461-252
42* Hex TPG “F” 6-32 s 1/4" ScrewM10908-12
43Clip NutM11271-88
44High Temperature Wire Assembly101480-101
45High Temperature Wire Assembly101480-111
47DSI Control No. 2003-19M51605-021
47DSI Control No. 2003-45110287-011
48DSI Wire Harness (DSI Control 2003-45 only)110267-011
Wire Assembly (DSI Control 2003-45 only)M9900-1701
Wiring Decal (DSI Control 2003-45 only)103402-031
Wiring Decal (DSI Control 2003-19 only)103402-011
Service Center ListM50985-011
Tradename Decal097940-072
General Information Decal103017-021
Thermostat Decal103021-011
Warning Decal099504-012
( ) Not shown.
(*) Standard hardware item, available locally.
LIMITED WARRANTY
DAYTON ONE-YEAR LIMITED WARRANTY. Dayton propane construction gas heater, 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 product 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 “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 limitations 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 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.
10
103026-01
Rev. F
10/02
Version B - For Reduction G016.J
®
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.