Operating Instructions & Parts Manual3VH18A and 3VH19A
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.
Dayton® Propane and
Natural Gas
Construction Heaters
Description
Dayton Model 3VH18A is a 40,000 to 100,000 Btu/Hr construction heater that uses
propane gas for combustion. Dayton Model 3VH19A is a 50,000 to 100,000 Btu/Hr
construction heater that uses natural gas for combustion. They are primarily intended for
the temporary heating of buildings under construction, alteration, or repair. These
heaters should never be used in occupied dwellings.
Unpacking
1. Remove all packing items applied to
heater for shipment. Keep plastic cover
caps (attached to valve inlet and hose/
regulator assembly) for storage.
2. Remove all items from carton.
3. 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
instructions should use
this heater.
If you need assistance
or heater information
such as an instruction
manual, labels, etc.
contact the manufac-
Figure 1 – Model 3VH18A Shown
turer.
Not for
home or
recreational vehicle use.
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.
These heaters are designed for use as
construction heaters in accordance with
ANSI Z83.7/CGA 2.14. Other standards
govern the use of fuel gases and heating
products for specific uses. Your local
authority can advise you about these. The
primary purpose of construction heaters is
to provide temporary heating of buildings
under construction, alteration or repair.
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 5S4491
Printed in U.S.A.
03430
0700/254/VCPVP
106183-01
Rev. C
11/00
®
Version B - For Reduction G016.J
Dayton Operating Instructions and Parts Manual
®
3VH18A and 3VH19A
Dayton Propane and Natural Gas
Construction Heaters
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 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.
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.
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.
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.
Natural Gas: Natural gas has a distinctive odor. This odor helps you detect a
natural gas leak. However, the odor
may fade. Natural gas may be present
even though no odor exists.
• Install and use
heater with care.
Follow all local ordinances and
codes. In the absence of local
ordinances and codes, refer to the
Standard for Storage and Handling
of Liquefied Petroleum Gas, ANSI/
NFPA 58 and the Natural Gas Installation Code, CAN/CGA B149.2. This
instructs on the safe storage and
handling of propane gases.
• For Model 3VH18A, use only the hose
and factory preset regulator provided with the heater.
• For Model 3VH18A, use only propane
gas set up for vapor withdrawal.
• For Model 3VH19A, use only natural
gas. Do not attempt to use with
propane gas.
• For Model 3VH19A, use only factory
preset regulator provided on heater.
• Provide adequate ventilation. Before
using heater, provide at least a 3square-foot opening of fresh,
outside air.
• This heater produces carbon monoxide, which is listed by the State of
California as a reproductive toxin
under Proposition 65.
• For indoor use only. Do not use
heater outdoors.
• Do not use heater in occupied
dwellings or in living or sleeping
quarters.
• Do not use heater in basement or
below ground level. If a leak occurs,
gas may accumulate to hazardous
amounts.
• Keep appliance area clear and free
from combustible materials, gasoline,
paint thinner, and other flammable
vapors and liquids. Dust is combustible. Do not use heater in areas with
high dust content.
• Keep 3VH18A heater at least six feet
from propane tank(s).
• For Model 3VH18A, keep propane
tank(s) below 100° F.
• Check heater for damage before each
use. Do not use a damaged heater.
• Check hose (if used) before each use
of heater. If highly worn or cut,
replace with hose specified by
manufacturer.
• Locate heater on stable and level
surface if heater is hot or operating.
• Not intended for use on finished
floors.
• Never block air inlet (bottom of
shell) or air outlet (around top of
shell) of heater.
• Keep heater away from strong drafts,
wind, water spray, rain, or dripping
water.
• Never operate heater while unattended.
• Keep children and animals away
from heater.
2
Dayton Operating Instructions and Parts Manual
Model 3VH18A - Propane
Model 3VH19A - Natural Gas
General Safety Information
(Continued)
• Never move, handle, or service a hot
or operating heater. Severe burns
may result. You must wait 20
minutes after turning heater off.
• To prevent injury, wear gloves when
handling heater.
• Never attach duct work to heater.
• Do not alter heater. Keep heater in
its original state.
• Do not use heater if altered.
• Turn off gas supply to heater when
not in use.
• 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.
Theory of Operation
THE FUEL SYSTEM
Propane Model: The hose/regulator
assembly attaches to the propane gas
supply. This provides fuel to the heater.
Natural Gas Model: The gas supply
attaches to the heater by a minimum 3/4
inch i.d. hose or flexible connector. User
must supply hose or flexible connector.
The length should be no more than 10
feet long. The natural gas moves through
the regulator and out the nozzle.
THE IGNITION SYSTEM
The piezo ignitor lights the main burner.
THE AUTOMATIC CONTROL SYSTEM
This system causes the heater to shut
down if the flame goes out.
Product Identification
Top
Shell
Thermocouple
Ignitor
Electrode
Burner
Tube
Base
Shield
Base
Piezo Ignitor Button
Figure 2 - Product Identification
MEDIUM
HIGH
Valve
Inlet
Emitter
Upper Shield
Lower Shield
Control
Knob
Hose/Regulator
Assembly for
Propane Gas
Regulator for
Natural Gas
®
3
Version B - For Reduction G016.J
Dayton Operating Instructions and Parts Manual
®
3VH18A and 3VH19A
Dayton Propane and Natural Gas
Construction Heaters
Specifications for Model 3VH18A
OutputMinimum FuelMaximum FuelSizeWeight
Rating Btu/HrFuelConsumptionConsumptionL x W x H (Inches)(pounds)
40,000 to 100,000Propane0.44 Gallons/Hour1.1 Gallons/Hour16 x 16 x 3530 (Heater)
Vapor Only1.86 Pounds/Hour4.7 Pounds/Hour18 x 18 x 3635 (Shipping)
Maximum SupplyMinimum SupplyMin. TemperatureManifold PressureIgnitor
Pressure to RegulatorPressure to RegulatorSurrounding Air(Inches of Water Column)Gap (Inches)
OutputMinimum FuelMaximum FuelSizeWeight
Rating Btu/HrFuelConsumptionConsumptionL x W x H (Inches)(pounds)
50,000 to 100,000Natural Gas48 scfh100 scfh16 x 16 x 3530 (Heater)
Only18 x 18 x 3635 (Shipping)
Maximum SupplyMinimum SupplyMin. TemperatureManifold PressureIgnitor
Pressure to RegulatorPressure to RegulatorSurrounding Air(Inches of Water Column)Gap (Inches)
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
and/or CAN/CGA B149.2. Your local library
or fire department will have this booklet.
The amount of propane gas ready for use
from propane tanks varies. Two factors
decide this amount.
1. The amount of propane gas in tank(s)
2. The temperature of tank(s)
The chart below shows the minimum
number of 100-pound tanks needed to
run the heater. Connect tanks together
with a manifold. Do not operate this
product with any tank smaller than 100
pounds.
Average Temperature (ºF)Number of
at Tank LocationTanks (100-lbs)
60°2
40°2
32°2
20°2
10°3
0°3
Less gas is vaporized at lower temperatures. Two or more 100-pound tanks or
one larger tank may be needed in colder
weather. Your local propane gas dealer will
help you select the proper supply system.
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