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C7061M MINIATURE DYNAMIC SELF-CHECK ULTRAVIOLET FLAME DETECTOR

65-0304—05

8

Fig. 7. Wiring diagram for C7061M Detectors with 7800 

Series Flame Safeguard controls with shutter drive 

circuitry.

IMPORTANT

Do not run the flame detector wiring in the same 

conduit with high voltage ignition transformer wires.

Connecting Detectors in Parallel

For a flame that is difficult to sight, using two parallel C7061 

Flame Detectors reduces nuisance shutdowns. If only one of 

the parallel detectors loses the flame signal, the other indicates 

the presence of the flame and keeps the burner running. When 

two parallel C7061 Detectors are used, a flame-simulating 

failure in either detector causes the burner to shut down. Two 

C7061 Detectors can be connected in parallel to the same 

terminals on 120 volt flame safeguard controls. To avoid 

exceeding the rating of the solid-state shutter switch in the 

R7861 Flame Signal Amplifier, do not connect more than two 

C7061 Detectors in parallel.

When the flame detectors are connected in parallel, the low 

level background signals are additive. This background signal 

increases as the temperature decreases.

IMPORTANT

Voltage and frequency: The C7061 is powered from 

the flame safeguard unit that delivers the necessary 

voltages to operate the tube and shutter.

ADJUSTMENTS AND 

CHECKOUT

UV Sensor Tube Test

For initial burner lightoff, consult the burner manufacturer 

instructions or the flame safeguard control instructions.

If the system does not start during the initial burner lightoff, 

check the UV sensor tube in the flame detector. If a reddish 

glow appears when there is no flame present, replace the UV 

sensing tube. When performing this test, make sure there are 

no extraneous sources of ultraviolet radiation in the test area 

[see “Radiation Sources (Other than Flame)” on page 4].

Adjust Detector Sighting

With the flame detector installed and the burner running, adjust 

the sighting position of the detector for optimum flame signal.

It is suggested that a volt-ohm meter with a minimum sensitivity 

of one megohm/volt and a zero to five or ten Vdc scale be used 

for R7861 Amplifier flame signal measurements. Measure the 

flame signal as illustrated in 

Fig. 8. Be careful to make the proper connections of 

positive (red) meter lead to positive (+) control jack and 

negative (black) meter lead to negative (-) or (-Com) jack with 

7800 Series controls. When the 7800 Series control has a 

Keyboard Display Module, a zero to five Vdc voltage is 

displayed on the module.

NOTES:

1.

The shutter operation may cause fluctuations in 

the voltage reading. Read the average stable 

reading, disregarding the peaks.

2.

The flame signal must be steady (or stable as 

described in note 1).

Move the detector and sight pipe around to sight the flame 

from various positions and angles. Try to get a maximum 

steady (or stable) reading on the meter that is above the 

minimum acceptable voltage listed in Table 1.

Measure the flame signal for the pilot alone, the main burner 

flame alone, and both together (unless monitoring only the pilot 

flame when using an intermittent pilot, or only the main burner 

flame when using direct spark ignition). Also measure the 

flame signal at low and high firing rates and while modulating in 

between (as applicable). With the detector in its final position, 

all required flame signals must be steady 

(or stable) and as specified in Table 1. If you cannot obtain the 

proper signal, refer to the Troubleshooting section.

WHITE

WHITE

YELLOW

BLUE

(G)

(F)

WIRING MUST BE NEC CLASS 1.

TERMINAL 5 – SHUTTER DRIVE - - - - - - -

TERMINAL 1 – NOT USED
TERMINAL 2 – FLAME OUTPUT - - - - -  

TERMINAL 3 – FLAME PUTPUT - - - -  -- - - 

TERMINAL 4 – SHUTTER DRIVE - - -  - - - 

1

2

3

4

5

1 AN R7861 DYNAMIC SELF-CHECK AMPLIFIER MUST BE USED.

TWO C7061M DETECTORS CAN BE CONNECTED IN PARALLEL TO THE 

SAME TERMINAL.

C7061M1016 ONLY: KEYED CONNECTOR ALLOWS CONNECTION IN ONLY 

ONE POSITION.

C7061M1016 ONLY: REFERENCE MOLEX WOODHEAD 1R5006A20A120 

(FORMERLY BRAD HARRISON™ 41310 TYPE CONNECTOR).  

2

3

4

3

4

7800 SERIES 

FLAME 

SAFEGUARD 

CONTROL WITH 

SHUTTER DRIVE 

CIRCUITRY

F

G

22

L2

M34066

Содержание C7061M

Страница 1: ...ing tube is field replaceable Threaded conduit fitting and color coded leadwires allow rapid electrical installation C7061M1016 uses Molex Woodhead 1R5006A20A120 formerly Brad Harrison Type 41310 connector 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...

Страница 2: ... 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 pro tectio...

Страница 3: ...nditions 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 C...

Страница 4: ...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 by following the Ignition Spark Response Test listed on page 9 Sin...

Страница 5: ...e defined as locating all flame detectors so that each detector responds only to the flame of the burner it is supervising In multiple burner systems not every detector can be positioned so its line of sight does not intercept flames from other burners For example this situation occurs in front fired boiler furnaces having more than one row of burners or in multilevel opposed fired furnaces where ...

Страница 6: ...tilate the sight pipe to cool the detector or to clear a viewing path through UV radiation attenuating material For a negative pressure combustion chamber drilling a few holes in the section of the sight pipe outside of the combustion chamber allows air at atmospheric pressure to flow through the sight pipe and into the chamber A perforated pipe nipple between the sight pipe and the detector can a...

Страница 7: ...on source in the event of a seal leakage or diaphragm failure 1 All wiring must comply with applicable local electrical codes ordinances and regulations Use NEC Class 1 wiring 2 Keep the flame signal leadwires as short as possible from the flame detector to the terminal strip or wiring subbase Capacitance increases with leadwire length reducing the signal strength The maximum permissible leadwire ...

Страница 8: ...the sighting position of the detector for optimum flame signal It is suggested that a volt ohm meter with a minimum sensitivity of one megohm volt and a zero to five or ten Vdc scale be used for R7861 Amplifier flame signal measurements Measure the flame signal as illustrated in Fig 8 Be careful to make the proper connections of positive red meter lead to positive control jack and negative black m...

Страница 9: ...iew Continue adjustments until the flame signal due to ignition spark is less than the flame signal values indicated in step 2 Response to other Ultraviolet Radiation Sources Some sources of artificial light produce small amounts of ultraviolet radiation Under certain conditions an ultraviolet detector responds as if it is sensing a flame Do not use an artificial light source to check the response...

Страница 10: ...e the plug in amplifier Then recheck the flame signal 7 Replace the ultraviolet sensing tube see Service on page 10 Then recheck the flame signal 8 Remove detector from the sight pipe and sight it on a UV source and note the flame LED on the 7800 Series device 9 If you cannot yet obtain a meter reading replace the detector IMPORTANT At the completion of Troubleshooting be sure to perform the Adjus...

Страница 11: ...f ultraviolet rays with an orifice ring or the like If there is too much ultraviolet radiation it can penetrate the tube unit even when the shutter is closed causing faulty operation Inspection and Adjustment After replacing the UV sensing tube perform a pilot turndown test an ignition spark response test and a safety shutoff test to verify proper functioning of the tube unit IMPORTANT Do not put ...

Страница 12: ...AME DETECTOR Automation and Control Solutions Honeywell International Inc 1985 Douglas Drive North Golden Valley MN 55422 customer honeywell com U S Registered Trademark 2013 Honeywell International Inc 65 0304 05 M S Rev 07 13 Printed in United States ...

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