Desa Tech 6BY70, 6BY72 Owner's Manual
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 property damage! Retain instructions for
future reference.
6BY70 and 6BY72
Dayton® Natural Gas Radiant
Construction Heaters
Description
Dayton Model 6BY70 is a 125,000 Btu/Hr construction heater.
Dayton Model 6BY72 is a 250,000 Btu/Hr construction heater.
These heaters use natural gas for combustion and are intended for
indoor use only and the temporary heating of well-ventilated buildings under construction, alteration, or repair. These heaters should
never be used in occupied dwellings. Products of combustion are
vented into the area being heated.
Figure 1 - Model 6BY70
Figure 2 - Model 6BY72
Unpacking
1. Remove all packing items
applied to heater for shipment. Keep plastic cover
caps (attached to valve inlet
and regulator assembly) for
storage.
2.
Remove all items from carton.
3. Check all items for ship-
Model 6BY70 Only
Form 5S5383
ping damage. If heater is
damaged, promptly inform
dealer where you bought
heater.
Printed in China or Mexico
09663
1105/382/VCPVP
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 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.
DES003
117163-01
05/05
Rev. D
11/05
Dayton Operating Instructions and Parts Manual
Dayton
®
Natural Gas Radiant
Construction Heaters
6BY70 and 6BY72
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.
Not for home or recreational vehicle use.
This product contains
and/or generates chemicals known to the State
of California to cause
cancer or birth defects, or
other reproductive harm.
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.
For 125,000 Btu models, do not exceed 1/2
psi (14" w.c.) gas pressure to the gas control
valve.
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.
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 working
properly. Get fresh air at once!
Check for proper ventilation and
have heater serviced.
Natural Gas: Natural gas is odor-
less. An odor-making agent is
added to this gas. The odor helps
you detect a gas leak. However,
the odor added to the gas can
2
Dayton Operating Instructions and Parts Manual
Models 6BY70 and 6BY72
General Safety
Information (Continued)
fade. 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.
1. 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, ANSI Z223.1/
NFPA 54. This instructs on
the safe storage and handling of flammable gases.
2. Use only with natural gas.
Do not attempt to use with
propane gas.
3. Use only the factory preset
regulator provided with the
heater.
4. Provide adequate ventilation. Before using heater,
provide at least a 0.28 m2
(3 ft2) opening of fresh,
outside air for each
100,000 Btu/hr of rating.
[Or for 125,000 Btu/hr
models 0.35 m2 (3.75 ft2)
and 250,000 Btu/hr models
0.7 m2 (7.5 ft2).]
5. For indoor use only. Do not
use heater outdoors.
6. Do not use heater in occupied dwellings or in living
or sleeping quarters.
7.
Do not use heater in basement or below ground level.
8. 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.
9. Minimum heater clearances
from combustibles
125,000 Btu/Hr: Sides 1.54 m
(5 ft), Top 1.22 m (4 ft)
250,000 Btu/Hr: Sides 1.83 m
(6 ft), Top 1.54 m (5 ft)
10. Check heater for damage
before each use. Do not
use a damaged heater.
11. Check hose (if used) before
each use of heater. If highly
worn or cut, replace.
12. Locate heater on stable
and level surface if heater
is hot or operating.
13. Not intended for use on
finished floors.
14. Never block any air inlet
or air outlet openings of
heater.
15. Keep heater away from
strong drafts, wind, water
spray, rain or dripping water.
16. Do not leave heater unattended.
17. Keep children and animals
away from heater.
18. To prevent burns, remove
19. Never move, handle or
20.
21. Never attach duct work to
22. Do not alter heater. Keep
23. Do not use heater if
24. Turn off gas supply to
25. Use only original replace-
Product Identification
Figure 3 - 125,000 Btu/Hr Model (6BY70)
handle before operating
heater (6BY70 only).
service a hot or operating
heater. Severe burns may
result. Wait 20 minutes
after turning heater off.
To prevent injury, wear gloves
when handling heater.
heater.
heater in its original state.
altered.
heater when not in use.
ment parts. This heater must
use design-specific parts. Do
not substitute or use generic
parts. Improper replacement
parts could cause serious or
fatal injuries.
Top
Protective
Screen
Combustion
Chamber
Cover
Lighting
Port
Control Knob
3
Dayton Operating Instructions and Parts Manual
Dayton
®
Natural Gas Radiant
Construction Heaters
6BY70 and 6BY72
Product Identification (Continued)
Top
Shell
Emitter
Ignitor
Electrode
Thermocouple
Base
Pilot Burner
Ignitor
Regulator/Fuel
Tube Assembly
Installed
Nozzle
Main
Burner
Tube
Base
Shell
Main
Burner
Valve
Handle
Automatic
Control
Valve Button
Figure 4 - 250,000 Btu/Hr Model (6BY72)
Valve Inlet
(1/2" SAE
Flare)
Theory of Operation
The Fuel System: The gas supply
attaches to the heater through
user supplied hose or pipe. This
provides fuel to the heater.
The Ignition System: The ignitor
lights the burner fuel supply.
The Automatic Control System:
This system causes the heater to
shut down if the flame goes out.
Natural Gas Supply
The user must furnish the natural gas supply and the connections to the heater.
For 125,000 Btu/Hr models,
regulate the natural gas supply
between a minimum 7" w.c. to a
maximum of 1/2 psi (14" W.C.).
The natural gas supply capacity should be able to supply a
minimum of 125 cubic feet of gas
at pressure for each heater connected to the system.
For 250,000 Btu/Hr models,
regulate the natural gas supply to min. 4 psi. If over 4 psi is
supplied, then use the supplied
regulator on the heater. The natural gas supply capacity should
be able to supply a minimum of
250 cubic feet of gas at pressure
for each heater connected to the
system.
Consult your natural gas supplier
for proper sizing of the natural
gas supply lines.
Follow all local ordinances and
codes. In the absence of local
ordinances and codes, refer
to the National Fuel Gas Code
Handbook, NFPA 54/ANSI Z223.1.
4
Dayton Operating Instructions and Parts Manual
Models 6BY70 and 6BY72
Specifications
Model 6BY70
• Rating: 125,000 Btu/Hr
• Fuel: Natural Gas Only
• Fuel Consumption: 3.5 m3/hr (125 ft3/hr)
• Manifold Pressure: 1.5 kPa (6" W.C.)
• Min Temperature: -29 °C (-20° F) Surrounding Air Temperature
• Ignitor Gap: 0.195"
Model 6BY72
• Rating: 250,000 BTU/Hr
• Fuel: Natural Gas Only
• Fuel Consumption: 243 ft3/hr
• Supply Pressure: Max. (to regulator) - 200 psi
Min. (to heater) - 4 psi
Max. To Heater Without Regulator - 4 psi
• Manifold Pressure: 3.5 psi
• Ignitor Gap: 0.195"
Ventilation
Provide at least a 0.28 m2
(3 ft2) opening of
fresh, outside air for
each 100,000 Btu/Hr of
rating 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.
Installation
Test all gas piping and
connections for leaks
after installation 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.
Read these instructions
carefully. Read and
adhere to these instructions. Do not allow anyone who has not read
these instructions to
assemble, light, adjust
or operate this heater.
Do not attempt to
operate the heater with
any gas other than that
indicated on the heater
nameplate.
5
The installation of this appliance must comply with local
and/or Provincial codes or, in
the absence of these codes,
with the National Fuel Gas
Code, ANSI Z223.1 – Latest
Edition or with the current
installation codes.
This heater (including hose and
regulator) must be inspected
before each use and at least
annually by a qualified service
person. If the hose shows evidence of excessive abrasion or
wear or if the hose is cut, it must
be replaced prior to the heater
being put into operation.
LOCATING HEATER
The heater must be located
on a hard, flat, level surface to
minimize the risk of accidental
tipping.
This appliance must be
installed only in locations
where the potential for physical damage to the appliance
(i.e., due to physical contact) is
reduced to a minimum.
The installer must inform the
owner/operator of this appliance that precautions must be
taken to protect the appliance
from physical damage.
This appliance produces radiant heat. Therefore, it must be
located at least 1.8 m (6 ft) away
from any propane/LP gas container and must not be directed
toward any propane/LP gas container within 6 m (20 ft).
The heater must be installed in a
location such that it will not be
exposed directly to water spray,
rain and/or dripping water.
Use of this heater in a draft/
windy area decreases its efficiency. If possible, operate the
unit in a draft free area.
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