Desa 3VH22 User Manual
Operating Instructions & Parts Manual
Dayton Operating Instructions and 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
Model 3VH22
property damage! Retain instructions for future reference.
®
3VH22
Dayton Propane Construction
Convection Heater
Description
Dayton Model 3VH22 heater is a 40,000, 60,000, and 80,000 Btu/Hr construction
heater. This heater uses propane gas for combustion. It is primarily intended for outdoor
use and the temporary heating of well-ventilated buildings under construction, alteration, or repair. This heater should never be used 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. Remove all items from carton.
3. Check all items for shipping damage. If
heater is damaged, promptly inform
dealer where you purchased 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 3VH22
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.
The heater is designed for use as a
construction heater 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.
Form 5S3931
Printed in U.S.A.
03430
1202/261/VCPVP
1
®
Dayton Operating Instructions and Parts Manual
®
Dayton Propane
Construction Convection Heater
3VH22
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: Not every possible circumstance 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.
This product
contains and/or
generates chemicals known to the
State of California to cause cancer or
birth defects, or other reproductive
harm.
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.
• 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.
• This product has been approved for
use in the Commonwealth of Massachusetts.
• Use only the hose and factory preset
regulator provided with the heater.
• Use only propane gas set up for
vapor withdrawal.
• Provide adequate ventilation. Before
using heater, provide at least a 2.5square-foot opening of fresh,
outside air.
• 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. Propane gas is
heavier than air. If a leak occurs,
propane gas may sink to the lowest
possible level and may accumulate to
explosive concentrations.
• 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.
• Minimum heater clearances from
combustibles: Sides: 3 feet, Top: 6 feet.
• Keep heater at least six feet from
propane tank(s).
• Keep propane tank(s) below 100° F.
• Check heater for damage before each
use. Do not use a damaged heater.
• Check hose 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.
• Never move, handle, or service a hot
or operating heater. Severe burns
may result. You must wait 15
minutes after turning heater off.
• To prevent injury, wear gloves when
handling heater.
2
Dayton Operating Instructions and Parts Manual
Model 3VH22
General Safety Information
(Continued)
• Never attach duct work to heater.
• Do not alter heater. Keep heater in
its original state.
• Do not use heater if altered.
• Turn off propane 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.
Product Identification
Shell
Thermocouple
Ignitor
Electrode
Burner
Tube
Top
General Specifications
Output Rating...................................... 40/60/80,000 Btu/Hr
Fuel ....................................................... Propane Vapor Only
Fuel Consumption
Gallons/Hr..................................... Min .44, Max .87
Pounds/Hour ................................ Min 1.86, Max 3.71
Supply Pressure to Regulator
Maximum...................................... 200 psi
Minimum, for input adjustment.. 20 psi
Manifold Pressure ............................... High 23.8 w.c., Low 18 w.c.
Ignitor Gap........................................... 0.195 Inches
Min. Temperature Surrounding Air ... -20ºF (-29ºC)
Weight - Heater................................... 13 pounds
Shipping .............................. 17 pounds
Size - L x W x H (Inches)
Heater ........................................... 15 x 16 x 20
Carton ........................................... 18 x 18.75 x 20.75
Theory of Operation
THE FUEL SYSTEM
The hose/regulator assembly attaches to
the propane gas supply. This provides fuel
to the heater.
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.
Piezo Ignitor
Button
Hose/Regulator
Assembly
Figure 2 - Product Identification
Gas Inlet
Connector
(1/4” SAE
flare)
O
F
F
L
O
H
I
M
E
D
Valve
Inlet
Base
Control
Knob
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