Honeywell C7061A, C7061F Product Data
65-0223-07
SIL
3
Capable
C7061A,F Dynamic Self-Check
C7061F
C7061A
Ultraviolet Flame Detector
PRODUCT DATA
FEATURES
• Oscillating shutter interrupts ultraviolet radiation
reaching the UV sensor 12 times per minute to provide
the UV sensor tube checking function. Amplifier
circuitry components are checked from the
microprocessor in the 7800 Series Control.
• Detectors can be mounted horizontally, vertically or at
any other angle. The self-checking C7061 models
require faceplate alignment and have integral locating
reference points to assure proper shutter mechanism
operation.
• Ultraviolet radiation sensing tube and quartz viewing
window are field replaceable.
• Threaded conduit fitting and color-coded leadwires
allow rapid electrical installation.
• Models available using Brad Harrison® 41310
connector.
• Two flame detectors can be wired in parallel to reduce
nuisance shutdowns in difficult flame sighting
applications.
• -40°F (-40°C) rated ultraviolet sensing tube.
APPLICATION
The C7061A,F are dynamic self-checking flame detectors for
sensing the ultraviolet radiation generated by the combustion
of gas, oil, or other fuels.
• Incorporates UV sensor tube checking feature; used
with R7861 Dynamic Self-check Amplifiers.
• Housing meets NEMA 4 enclosure standards (C7061A).
• Protective heat block built into mounting flange.
C7061F
• Housing designed to be explosion-proof and
Underwriters Laboratories Inc. listed for use in
hazardous locations; Class I, groups C and D; and
Class II, groups E, F and G.
• Viewing window rated for 100psi (690 kPa).
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 3
Wiring (Fig. 10) ................................................................. 7
Adjustments and Checkout .............................................. 8
Troubleshooting ................................................................ 10
C7061A,F DYNAMIC SELF-CHECK ULTRAVIOLET FLAME DETECTOR
SPECIFICATIONS
IMPORTANT
The specifications in this publication do not include
normal manufacturing tolerances. Therefore, this unit
may not exactly match the specifications listed. This
product is tested and calibrated under closely
controlled conditions, and minor differences in
performance can be expected if those conditions are
changed.
Models:
C7061A Dynamic Self-Check Ultraviolet Flame Detector.
C7061F Dynamic Self-Check Ultraviolet Flame Detector.
(Same as C7061A except with explosion-proof housing for
use in hazardous locations).
Electrical Ratings:
Voltage and Frequency:
The C7061 is powered from the Flame Safeguard unit that
delivers the necessary voltages to operate the tube and
shutter.
Ambient Operating Temperature Ratings
(Outside the Case): -40°F to 175°F (-40°C to 80°C) using
part no. 129464N UV Sensing Tube.
Storage Temperature Ratings: -60°F to 175°F
(-50°C to 80°C).
Housing:
C7061A:
Violet, cast-aluminum cover. Separate mounting flange
(with heat block) and faceplate provide heat insulation
and sealoff.
Meets NEMA 4 enclosure requirements (indoor, outdoor
protection; rain-tight, dust-tight, hose-directed water
protection).
Optional water jacket available; see Accessories.
C7061F: Explosion-proof, two-piece, violet, cast aluminum.
Pressure Rating of Quartz Viewing Window:
C7061A: 20 psi (138 kPa), see Replacement Parts.
C7061F: 100 psi (690 kPa).
Mounting: C7061A: Mounting flange with 3/4 NPT internal
threads for attaching to sight pipe.
C7061A1046: Mounting flange with 1 inch NPT internal
threads for attaching to sight pipe.
C7061F: Pipe union with 1 inch NPT internal threads for
attaching to sight pipe.
Wiring Connections:
Leadwire: NEC Class 1 color coded.
Length: 8 ft (2.4m).
Threaded Leadwire Faceplate Opening: 1/2-14 NPSM
internal threads for attaching conduit.
Connector: C7061A1038 and C7061A1046: Brad Harrison®
41310.
Dimensions: See Fig. 1.
Weight:
C7061A: 2.6 lbs (1.2 kg).
C7061F: 14.5 lbs (6.6 kg).
Serviceability:
C7061A: Field replaceable ultraviolet sensing tube viewing
window, coil and shutter assembly gaskets.
C7061F: Field replaceable self-checking coil and shutter
assembly.
SIL 3 Capable:
The C7061A or F when used with a R7861 self-check ampli-
fier in Relay Module EC7810A, 20A, 30A, 40L, 50A;
RM7800[E,G,L,M], 30A, 38[A,B,C], 40[E,G,L,M] 50A,
90[A,B,C,D], 97[A,C], 98A is SIL 3 Capable in a properly
designed Safety Instrumented System. See form number
65-0312 for Certificate Agreement.
Approvals:
Underwriters Laboratories Inc. Listed: File Number MP268,
Guide Number MCCZZ.
Canadian Standards Association Certified: Master File
LR95329-1.
Factory Mutual Approved: 14740.01.
SwissRe (formerly Industrial Risk Insurers) Acceptable.
C7061F: For use in hazardous locations; Class I, Groups C
and D; Class II, Groups E, F, and G; File no. E34649.
Pressure Rating of Quartz Focusing Lens: 20 psi
(138 kPa), see Accessories.
Replacement Parts:
All Models:
129464N Ultraviolet Sensing Tube; -40°F (-40°C).
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1985 Douglas Drive North
Minneapolis, Minnesota 55422-4386
3. http://customer.honeywell.com or http://customer.honeywell.ca
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
65-0223—07 2
C7061A,F DYNAMIC SELF-CHECK ULTRAVIOLET FLAME DETECTOR
CAUTION
WARNING
MOUNTING FLANGE
1/2–14 NPSM
LEADWIRES
FACEPLATE
3/4–14 NPT
M10167A
3-3/4
(95)
7-7/32
(183)
5-1/8 (130)
3-7/16
(87)
5-1/4 (133)
1
1
2
2
C7061A1046: 1 INCH NPT
C7061A1038 AND C7061A1046: BRAD HARRISON® CONNECTOR.
M1963
FACEPLATE
PIPE
UNION
8
(203)
DIA.
1/2-14 NPT
LEADWIRES
9 (229)
2
(51)
5
(127)
1-11 1/2 NPT
2-1/16
(52)
11/2
(38)
5/16-18 UNC-2B BY
7/16 (11) DEEP
MOUNTING HOLES (2)
2 (51)
1 (25)
3 (76)
114465 Gasket, silicone rubber; for installing viewing
window (three required).
190971B Coil and Shutter Assembly.
C7061A:
114372 Quartz Viewing Window; rated for 20 psi (138 kPa).
120739 Gasket, fiber-neoprene; heat insulation and
seal-off for mounting flange.
C7061F:
122037 Quartz Viewing Window; rated for 100 psi
(690 kPa).
Fig. 1. Dimensions of C7061A in in. (mm).
Fig. 2. Dimensions of C7061F in in. (mm).
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced flame safeguard
service technician.
4. After installation is complete, check out product
operation as provided in these instructions.
Equipment damage hazard.
Sensing tube can fail to discriminate between
flame conditions.
Change sensing tube after 40,000 hours of continuous
use.
Electrical shock hazard.
Can cause serious injury or death.
Disconnect power supply before beginning installation
to prevent electrical shock and equipment damage.
More than one disconnect may be involved.
IMPORTANT
1. Do not connect these detectors to non-Honeywell
manufactured controls (primaries, programmers,
multiburner systems, and burner management
systems). Unsafe conditions could result.
2. All wiring must be NEC Class 1 (line voltage).
3. Voltage and frequency of the power supply connected
to this detector must agree with the values marked on
the detector.
4. Sight the detector so it does not respond to ignition
spark.
5. On multiburner installations, each detector must
respond only to the flame of the burner it is
supervising.
6. Do not connect more than two C7061 Flame
Detectors in parallel.
Proper flame detector installation is the basis of a safe and
reliable flame safeguard installation. Refer also to the burner
manufacturer instructions. Carefully follow all instructions for
the best possible flame detection application.
Accessories:
C7061A:
122748 Quartz Viewing Window, rated for 50 psi
(345 kPa).
124204 Quartz Focusing Lens, rated for 20 psi (138 kPa);
increases the detector-sensed ultraviolet radiation.
123539 Antivibration Mount.
204341 Mirror Assembly.
124198 Mounting Flange, aluminum, with 1 inch NPT
internal threads for attaching to sight pipe.
190105 Water Jacket.
When Installing this Product...
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
condition.
INSTALLATION
Basic Requirements
The combustion flames of most carbon-based fuels emit
sufficient ultraviolet radiation to enable the C7061 Solid State
(Purple Peeper) Ultraviolet Flame Detector to prove the
presence of a flame in a combustion chamber. The detector is
mounted outside the combustion chamber with its mounting
flange or union threaded to one end of a sight pipe inserted
through the wall of the combustion chamber. The ultraviolet
sensing tube in the flame detector sights the flame through the
pipe.
When a flame is present, the UV tube in the C7061 senses the
ultraviolet radiation emitted. The C7061 then produces a signal
that is sent to the amplifier in the flame safeguard control. The
amplified signal pulls the flame relay into the control to allow
proper system operation.
Because it is necessary for the UV sensing tube to actually see
the flame, it is best to locate the detector as close to the flame
as physical arrangement, temperature, and other restrictions
permit. These restrictions are described in detail in the
following paragraphs.
3 65-0223—07
C7061A,F DYNAMIC SELF-CHECK ULTRAVIOLET FLAME DETECTOR
M1956
DETECTOR IN GOOD
SIGHTING POSITION
(LOW ANGLE SIGHTING)
FLAME DEPTHANGLE VIEW
BURNER
NOZZLE
DETECTOR IN POOR
SIGHTING POSITION
FLAME DEPTHPERPENDICULAR VIEW
UNBURNED FUEL
Determine Location
Before beginning the actual installation, determine the best
location for mounting the detector. Carefully consider the
factors discussed in this section before deciding on the
location.
Temperature
Install the C7061 where the ambient temperature (outside the
case) stays within the ambient operating temperature ratings.
To keep the C7061 below its maximum rating, it may be
necessary to add additional insulation between the wall of the
combustion chamber and the detector. A shield or screen can
be added to reflect radiated heat away from the detector. If the
detector continues to get too hot, cooling is necessary. Refer to
the Sight Pipe Ventilation section. (A 190105 Water Jacket is
also available for cooling the C7061.)
Vibration
If the C7061 is subject to excessive vibration, use a special
123539 Antivibration Mount. If you use this mount, install it
before you position and sight the detector.
Clearance
Make sure there is enough room to easily mount the sight pipe,
detector, and all required fittings, and to remove the detector
for troubleshooting and servicing.
Radiation Sources (Other than Flame)
Examples of radiation sources (other than flame) that could
actuate the detection system:
Ultraviolet sources:
Hot refractory above 2300°F (1260°C).
Spark:
— Ignition transformers.
— Welding arcs.
— Lightning.
Welding flames.
High voltage condensers.
High voltage coronas.
Radioisotopes.
Except under unusual circumstances, none of these sources
except hot refractory and ignition spark would be present in or
near the combustion chamber.
The detector can respond to hot refractory above 2300°F
(1260°C) if the refractory surface represents a significant
percentage of the detector field of view. If the temperature of
the hot refractory causes the flame relay (in the flame
safeguard control) to pull in, re-aim the sight pipe so the
detector views a cooler area of the refractory.
Ignition spark is an intense source of ultraviolet radiation.
When installing the detector, make sure it does not respond to
ignition spark.
Single Burner Requirements
The detector must have an unobstructed view of a steady part
of the flame it is supervising. This requires a proper sighting
angle and minimized ultraviolet radiation attenuation effects.
However, when supervising only one burner, sighting
requirements are simplified.
Sighting Angle (Fig. 3)
The first 30 percent of a flame closest to the burner nozzle (the
flame root) emits the most ultraviolet energy. Also, if the
detector sights the flame at an angle instead of
perpendicularly, it views more flame depth. Therefore, the best
sighting angle is nearly parallel to the axis of the flame,
permitting the detector to view a large portion of the first 30
percent of the flame closest to the burner nozzle, as illustrated
in Fig. 3.
Low angle sighting permits the detector to view a greater depth
of flame, thus reducing the effects of instabilities in the flame
pattern. Also, the environment near the burner nozzle is
usually cleaner than at any other part of the combustion
chamber. This provides a clearer line of sight and can keep the
viewing window cleaner, thus reducing the maintenance
required.
Bright incandescent or fluorescent artificial light.
Solar radiation.
Gas lasers.
Sun lamps.
Germicidal lamps.
Bright flashlight held close to the sensing tube.
Gamma ray and X-ray sources:
Diffraction analyzers.
Electron microscopes.
Radiographic X-ray machines.
High voltage vacuum switches.
65-0223—07 4
Fig. 3. Detector sighting angle.
NOTE: When possible, it is desirable to tilt the detector and
sight pipe downward to prevent the buildup of soot in
the pipe or on the viewing window.
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