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Version B - For Reduction G016.J

Model 3VH21

Dayton Operating Instructions and Parts Manual

Operating Instructions & Parts Manual 3VH21

Dayton Natural Gas

Construction Heater

Form 5S4126

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.

Failure to comply with the

precautions and instruc-

tions provided with this

heater can result in death,

serious bodily injury, and

property loss or damage

from hazards of fire, explo-

sion, burn, asphyxiation,

carbon monoxide poison-

ing, and/or electrical shock.

Only persons who can

understand and follow the

instructions should use or

service this heater.

If you need assistance or

heater information such as

an instructions manual,

labels, etc. contact the

manufacturer.

GENERAL HAZARD

WARNING

Unpacking

1. Remove all packing items applied to

heater for shipment. Keep plastic cover

caps (attached to valve inlet 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.

4. Hose not included. User must supply

hose or flexible connector and

appropriate gas supply pressure.

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 in-

structions. 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.

Description

Dayton Model 3VH21 heater is 250,000 Btu/Hr construction heater. This heater uses

natural gas for combustion. It is primarily intended for the temporary heating of

buildings under construction, alteration, or repair. This heater should never be used in

occupied dwellings.

Figure 1 – Model 3VH21

Printed in U.S.A.

03430

0997/231/VCPVP

The heater is designed for use as a

construction heater. Certain 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 combus-

tion 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.

104134-01

Rev. A

10/97

Summary of content (12 pages)

PAGE 1
Operating Instructions & Parts Manual Dayton Operating Instructions and Parts Manual 3VH21 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.
PAGE 2
3VH21 Dayton Operating Instructions and Parts Manual Dayton Natural Gas Construction Heater ® General Safety Information Make certain you read and understand all warnings. Keep these instructions for reference. It is 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.
PAGE 3
Dayton Operating Instructions and Parts Manual Model 3VH21 Product Identification Theory of Operation Top THE FUEL SYSTEM: The gas supply attaches to the heater by a minimum 3/8 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 (if used) and through the control valve, then out the nozzle. Shell Emitter THE IGNITION SYSTEM: The piezo ignitor lights the burner fuel supply.
PAGE 4
3VH21 Dayton Operating Instructions and Parts Manual Dayton Natural Gas Construction Heater ® Ventilation Provide at least a 7.5-square-foot opening of fresh, outside air while running heater. If proper fresh, outside air ventilation is not provided, carbon monoxide poisoning can occur. Provide proper fresh, outside air ventilation before running heater. FRESH OUTSIDE AIR OPENING REQUIREMENTS Heater Size Square feet opening 250,000 Btu/Hr 7.
PAGE 5
Dayton Operating Instructions and Parts Manual Model 3VH21 Operation TO STOP HEATER 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. 1. Tightly close natural gas supply valve. TO START HEATER 2. Using a gloved hand, shut off main burner valve. Do this by turning main burner valve handle towards the OFF position until it stops.
PAGE 6
3VH21 Dayton Operating Instructions and Parts Manual Dayton Natural Gas Construction Heater ® Troubleshooting Chart Never attempt to service heater while it is connected to natural gas supply, operating, or hot. Severe burns can occur. Symptom Possible Cause(s) Corrective Action Pilot fails to light 1. Natural gas supply valve closed 2. Air in gas line 1. Open natural gas supply valve slowly 2. Allow several minutes to purge air while pilot button is depressed 3. Replace pilot orifice 4.
PAGE 7
Dayton Operating Instructions and Parts Manual Model 3VH21 Maintenance Never service heater while it is connected to gas supply, operating, or hot. Severe burns can occur. 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.
PAGE 8
3VH21 Dayton Operating Instructions and Parts Manual Dayton Natural Gas Construction Heater ® Replacement Parts For Model 3VH21 Natural Gas Construction Heater, call 1-800-323-0620 24 hours a day — 365 days a year 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 Operations P.O. Box 3074 1657 Shermer Road Northbrook, IL 60065-3074 U.S.A.
PAGE 9
Dayton Operating Instructions and Parts Manual 3VH21 Replacement Parts List Model 3VH21 Model 3VH21 Natural Gas Construction 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. This will also protect your warranty coverage for parts replaced under warranty. Reference Number Description Part No.
PAGE 10
3VH21 Dayton Operating Instructions and Parts Manual Dayton Natural Gas Construction Heater Notes ® ____________________________________________________________________________________________________________________ ____________________________________________________________________________________________________________________ ____________________________________________________________________________________________________________________ _________________________________________________________
PAGE 11
Dayton Operating Instructions and Parts Manual Notes Model 3VH21 ____________________________________________________________________________________________________________________ ____________________________________________________________________________________________________________________ ____________________________________________________________________________________________________________________ ______________________________________________________________________________________________
PAGE 12
3VH21 Dayton Operating Instructions and Parts Manual Dayton Natural Gas Construction Heater ® Limited Warranty Dayton One-Year Limited Warranty. Natural gas construction heater model covered in this manual is 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.