Honeywell C7061M, C7061M1008, C7061M1016 Product Data

65-0304-05

SIL

3

Capable

C7061M Miniature Dynamic Self­Check Ultraviolet Flame Detector

PRODUCT DATA

FEATURES

• Shutter interrupts ultraviolet radiation reaching the UV
sensor 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 -45° to +90° in vertical
direction.

• Ultraviolet radiation sensing tube is field replaceable.

• Threaded conduit fitting and color-coded leadwires
allow rapid electrical installation.

APPLICATION

The C7061M is a dynamic self-checking flame detector for
sensing the ultraviolet radiation generated by the combustion
of gas, oil, or other fuels.

• C7061M1016 uses Molex Woodhead 1R5006A20A120
(formerly Brad Harrison

• Two flame detectors can be wired in parallel to reduce
nuisance shutdowns in difficult flame sighting
applications.

• -4°F (-20°C) to 175°F (80°C) ambient temperature.

• Incorporates UV sensor tube checking feature; used
with R7861 Dynamic Self-check Amplifiers.

• Housing protection is IP66. (similar to Nema IV).

• Integrated collar threaded for mounting on a 1 in. sight
pipe.

• Viewing window rated for 50psi (350 kPa).

®

Type 41310) connector.

Contents

Application ........................................................................ 1

Features ........................................................................... 1

Specifications ................................................................... 2

Installation ........................................................................ 3

Ordering Information ........................................................ 2

Wiring ............................................................................... 7

Adjustments and Checkout ............................................... 8

Troubleshooting ................................................................ 10

Service ............................................................................. 10

C7061M MINIATURE 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:

C7061M1008 - with 8 foot (2.4m) leadwires.
C7061M1016 - With connector.

Electrical Ratings:

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):

-4°F to 175°F (-20°C to 80°C) using part no. 129464N UV
Sensing Tube.

Storage Temperature Ratings:

-4°F to 158°F (-20°C to 70°C).

Housing:

Violet, plastic cover.
Housing protection is IP66. Similar to Nema 4 (indoor, outdoor

protection; rain-tight, dust-tight, hose-directed water pro­tection).

Pressure Rating of Quartz Viewing Window:

50 psi (350 kPa)

Mounting:

Threaded collar (internal 1-11 1/2 NPSM) internal threads for

attaching to a 1 inch sight pipe.

Wiring Connections: (C7061M1008)

Leadwire: NEC Class 1 color coded.
Length: 8 ft (2.4m).

Threaded Leadwire Faceplate Opening:

1/2-14 NPSM internal threads for attaching conduit (avoid

overtightening that could crack the housing).

Connector:

C7061M1016: Molex Woodhead 1R5006A20A120 (formerly

Brad Harrison

Dimensions:

See Fig. 1.

Weight:

1.4 lbs (630 g).

Approvals:

Underwriters Laboratories Inc. Listed: MP268, Guide MCCZ2,

MCCZ8
Factory Mutual approved.
SwissRe (formerly Industrial Risk Insurers) Acceptable.

Replacement Parts:

129464N Ultraviolet Sensing Tube

Accessories:

123539 Antivibration Mount.
204341 Mirror Assembly.
105172C Pressure Sealoff adapter (3/4 in. npt)
118367 Swivel Mount
136733 Heat Block (3/4 in. npt)

SIL 3 Capable:

The C7061M when used with a R7861 Self Check amplifier in

relay module EC7810A, 20A, 30A, 40L, 50; RM7800 [E, G,

L, M], 30A, 38[A,B,C], 40[E,G,L,M], 50A, 88A, 90[A,B],

97[A,C], 98A is SIL 3 Capable in a properly designed

safety instrumented system. See Form number 65-0312

for certificate agreement.

®

Type 41310).

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 Environmental and Combustion Controls Sales Office (check white pages of your phone directory).

2. Honeywell Customer Care

1885 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 Belgium, Canada, China, Czech
Republic, Germany, Hungary, Italy, Mexico, Netherlands, United Kingdom, and United States.

65-0304—05 2

C7061M MINIATURE DYNAMIC SELF-CHECK ULTRAVIOLET FLAME DETECTOR

CAUTION

WARNING

M29114A

2-9/64 (55)

13/16 (21)

2-21/32

(68)

3-15/32

(88)

1-33/64

(39)

PARALLEL
PIPETHREAD
1-11/2 NPSM

33/64

(13)

2-9/64

(55)

1-35/64

(40)

CONDUIT TUBE CONNECTION
PORT 1/2 NPSM

Fig. 1. Dimensions of C7061M in inches. (mm).

INSTALLATION

When Installing this Product...

1. Read these instructions carefully. Failure to follow them

could damage the product or cause a hazardous
condition.

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.

NOTICE
Per industry standards, a conduit seal or a cable type that
is sealed is required to be installed in a device that can
result in flammable gas or flammable liquid flow through a
conduit or cable to an electrical ignition source in the
event of a seal leakage or diaphragm failure.

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. The C7061 is powered from the Flame Safeguard unit
that delivers the necessary voltages to operate the
sensing tube and shutter.

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.

Basic Requirements

The combustion flames of most carbon-based fuels emit
sufficient ultraviolet radiation to enable the C7061 (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 nut
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 energizes the flame relay in the control to allow
proper system operation.

3 65-0304—05

C7061M MINIATURE DYNAMIC SELF-CHECK ULTRAVIOLET FLAME DETECTOR

M29115A

UNBURNT FUEL

GOOD

DEPTH OF FLAME IS LONG WHEN THE
MONITORING DIRECTION INTERSECTS
THE FLAME AXIS AT ACUTE ANGLE

BURNER

BAD

DEPTH OF FLAME IS SHORT

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.

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.

Vibration

The detector withstands normal burner 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.

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 by following the Ignition Spark Response Test
listed on page 9.

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

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. 2.

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.

Radiation Sources (Other than Flame)

Examples of radiation sources (other than flame) that could
actuate the detection system:

1. Ultraviolet Sources:
a. Hot refractory above 2500°F (1371°C).
b. Spark:
c. Ignition transformers.
d. Welding arcs.
e. Lightning.
f. Gas lasers.
g. Sun lamps.
h. Germicidal lamps.

2. Gamma Ray and X-ray Sources:
a. Diffraction analyzers.
b. Electron microscopes.
c. Radiographic X-ray machines.
d. High voltage vacuum switches.
e. High voltage condensers.
f. 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

Fig. 2. 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.

In most installations, the detector needs to respond to the pilot
flame alone, then the pilot and main burner flame together, and
finally the main burner flame alone. The detector must meet all
sighting requirements that apply:

• Pilot flame alone—the smallest pilot flame that can be
detected must be capable of reliably igniting the main
burner.

• Pilot and main burner flame together—the detector must
sight the junction of both flames.

• Main burner flame alone—the detector must sight the most
stable part of the flame for all firing rates.

65-0304—05 4