background image

EN1C-0015SZ20 R0602

2

DESCRIPTION

The C7061A1020 and C7061F1003 detector models are
identical except for housings.
Model C7061F detector is for use in installations requiring
explosion proof packaging. The housing is conform the EExd
IIC T6 classification. More details for the explosion proof
housing can be found in the chapter Standards and
Approvals.
The C7061F model has a 1-inch NPT tapping for mounting
onto a sight pipe. For allowable mounting positions of model
C7061A and model C7061F, see Page 9.

The terminal block on both models is of wire clamp type with
removable screws and is situated in the compartment of the
C7061. The UV cell contains an ultraviolet sensing tube,
shutter assembly, terminal block and magnifying lens.
The UV sensor can be mounted from the programmer/flame
switch up to a length of 300 m.

FEATURES

• Oscillating shutter interrupts ultraviolet radiation reaching

the UV Sensor 12 times per minute (when used with R7861
amplifier in combination with 7800 SERIES) to provide the
UV Sensor tube checking function. When used with the
R7061 amplifier in combination with R4348 flame switch,
the shutter frequency is 60 times per minute. Amplifier
circuitry components are checked from the
microprocessor in the 7800 SERIES Control.

• Detectors can be mounted horizontally, vertically or at any

angle in between. The self-checking C7061 models require
faceplate alignment and have integral locating reference
points to assure proper operation of the shutter
mechanism.

• Ultraviolet radiation sensing tube and quartz viewing

window are field replaceable.

• Two flame detectors can be wired in parallel to reduce

nuisance shutdowns in difficult flame sighting applications.

• A swivel mount is available to facilitate flame sighting.
• -40°C (-40°F) rated ultraviolet sensing tube is available.
• lncorporates UV Sensor tube checking feature; used with

R7061 and R7861 Dynamic Self-Check amplifiers.

• High pressure 50 psi (345 kPa) quartz viewing window,

magnifying lens and antivibration mount are available as
accessories.

• Housing meets IP67 enclosure standards.
• C7061 F only: explosion-proof housing, meets EExd IIC

T6 classification.

• Protective heat block built into mounting flange.

ORDERING INFORMATION

When ordering specify:

• Complete model number.

Order separately:

• R7061 Dynamic Self-Check Ultraviolet Amplifier.

• R7861A Dynamic Self-Check Ultraviolet Amplifier.
• Replacement parts, if desired.
• Accessories, if desired
• Flame safeguard control

GENERAL

Содержание C7061A

Страница 1: ...ier and R4348 Flame Switch or or with R7861A Dynamic Self Check Ultraviolet amplifier and 7800 SERIES Burner Programmers These configurations provide a closed loop self checking circuit which insures the integrity of both amplifier and flame detector Improper response simulated flame loss results in a safety shutdown and or alarm CONTENTS GENERAL Description 2 Features 2 Orderdering information 2 ...

Страница 2: ...utter frequency is 60 times per minute Amplifier circuitry components are checked from the microprocessor in the 7800 SERIES Control Detectors can be mounted horizontally vertically or at any angle in between The self checking C7061 models require faceplate alignment and have integral locating reference points to assure proper operation of the shutter mechanism Ultraviolet radiation sensing tube a...

Страница 3: ...i maximum C7061F 690 kPa 100 psi maximum Dimensions C7061A see figure 1 C7061F see figure 2 Housing C7061A Construction cast aluminum cover Color Violet Mounting flange with heat block and faceplate are separate to provide heat insulation and seal Off C7061F Meets requirements explosion proof EEx d IIC T6 Construction cast aluminum Cover Color Violet Mounting flange with heat block and faceplate a...

Страница 4: ...F 129464M Uttraviolet Sensing Tube 129464N Ultraviolet Sensing Tube for 40 F 40 C operation 190971B Coil and Shutter Assembly Replacement parts for model C7061A 114372 Quartz Viewing Window rated for 20 Psi 138 kPa 114465 Gasket Silicone rubber for installing viewing window three required 120739 Gasket fiber neoprene heat insulation and seal off for mounting flange Accessories for model C7061A and...

Страница 5: ...5 EN1C 0015SZ20 R0602 DIMENSIONAL DRAWING Fig 1 Dimensional drawing C7061A in inches mm Fig 2 Dimensional drawing C7061F in mm ...

Страница 6: ...detector as close to flame as physical arrangement temperature and other restrictions permit These restrictions are described in detail in the following paragraphs Determine the location Before beginning the actual installation estimate the best location for mounting the detector based upon these factors 1 Temperature Install the flame detector where the surrounding temperature will remain within ...

Страница 7: ...positioned so its line of sight does not intercept flames from other burners This situation occurs in front fired boiler furnaces having more than one row of burners or in multilevel opposed fired furnaces where the burners face each other When planning such an installation locate each flame detector so that it has the best possible view of the root of the flame s it is supervising and the worse p...

Страница 8: ...t pipe You may also want to use a swivel mount or an antivibration mount Each of these cases may require additional fittings Reducer For sight pipes of larger diameter than the mounting flange connector or union install a reducer as illustrated in Fig 5 The reducer will require a close nipple with these external threads 3 4 or 1 inch NPT Sight Pipe Ventilation It may be necessary to ventilate the ...

Страница 9: ...then separate the two sections C Screw the front section of the mounting flange onto the sight pipe reducer or other fitting D Fit the slots in the back section of the mounting flange with the detector over the three screws in the front section and rotate the detector so the screws hold the flange together E Tighten the screws securely IMPORTANT The rivit on on the faceplate must be at the top see...

Страница 10: ...installations use Honey well specification no R1298020 wire or equivalent for the F lead wire This wire is rated up to 204 C 400 F for continuous duty It is tested for operation up to 600 volts and for breakdown up to 7500 volts For the other lead wires use moisture resistant no 14 wire selected for a temperature rating above the maximum operating temperature 7 Refer to Fig 10 for wiring connectio...

Страница 11: ... diagram for C7061A1020 C7061F1003 detector with 7800 SERIES Flame Safeguard controls with shutter drive circuitry Fig 10_4 Wiring diagram for C7061A1020 C7061F1003 detector with R4348B Flame Safeguard controls with shutter drive circuitry ...

Страница 12: ...relay in the flame safeguard control A Close the pilot and main burner manual shutoff valves B Start the burner and run through the lgnition period lgnition spark should occur but the flame LED must not light The flame signal should not be greater than 0 25 Vdc C If the flame relay does pull in reposition the detector farther from the spark or relocate resight the detector to eliminate reduce the ...

Страница 13: ... the position of the detector If you complete all of the procedures and still cannot obtain a proper flame signal replace the detector Preliminary lnspection A Check for the proper line voltage Make sure the master switch is closed connections are correct and power supply is of the correct voltage and frequency B Check the detector wiring for defects a lncorrect connections b Wrong type or size of...

Страница 14: ...be out of its socket F Insert the new tube through the openings in the shutter assembly G Align the three pins on the new tube with the holes in the socket H Carefully push the new tube firmly into the socket the alignment guide will snap into place around the tip of the tube I Make sure the new UV sensor tube is seated securely J Replace the detector cover Replacing the Coil and Shutter Assembly ...

Страница 15: ...viewing window or focusing lens G Insert two rubber mounting gaskets only one gasket when replacing a focusing lens into the aperture H Put the back section of the mounting flange rubber was her and asbestos neoprene gasket in place on the faceplate and securely tighten the three mounting screws NOTE Make sure the red rubber washer between the gray fiber neoprene gasket and the back section of the...

Страница 16: ...16 EN1C 0015SZ20 R0602 ...

Отзывы: