Honeywell C7915A Скачать руководство пользователя страница 1

Страница: 1 / 12

PRODUCT DATA

65-0292-06

C7915A Infrared Flame Detector

APPLICATION

The C7915A Flame Detector includes a lead sulfide photocell

that is sensitive to the infrared radiation emitted by the

combustion of fuels such as natural gas, oil, and coal.

• Particularly suitable for combination or dual-fuel

applications.

• When installed properly, can supervise the pilot flame and/

or the main burner flame.

• Mounts easily on a standard 3/4 inch sight pipe.

• The infrared sensor plugs into an electrical socket in the

C7915A assembly and is field replaceable.

• The lead sulfide photocell’s sensitivity to infrared radiation

is compatible with a wide range of flame supervisory

applications.

• Flexible metal cable protects and electrically shields the

detector coaxial cables.

• Accessories available include a heat block, seal-off

adapter, reducer bushing, and orifice plate.

• Immune to x-ray testing.

SPECIFICATIONS

STANDARD MODELS

MODELS: See Table 6 for flame safeguard controls and asso-

ciated amplifiers.

DETECTOR RESPONSE: Responds to infrared radiation with

wavelengths between 0.75 and 1.0 micron.

LEAD SULFIDE PHOTOCELL: Photo conductor resistance

decreases as incident radiant energy increases.

AMBIENT TEMPERATURE RATING: -40°F to 125°F (-40°C to

52°C) maximum at the lead sulfide photocell.

MOUNTING:

C7915A Mount—knurled collar with 3/4-14 NPSM internal

threads for mounting on a standard 3/4 in. pipe (see Fig. 1).

32007255-001 Lead Sulfide Photocell—two leads for inserting

into socket in C7915A (see Fig. 8).

Contents

Application ........................................................................

Specifications ...................................................................

Ordering Information ........................................................

Operation ..........................................................................

Installation ........................................................................

Wiring ...............................................................................

Adjustments and Checkout ............................................... 10

Troubleshooting ................................................................ 11

Содержание C7915A

Страница 1: ...cally shields the detector coaxial cables Accessories available include a heat block seal off adapter reducer bushing and orifice plate Immune to x ray testing SPECIFICATIONS STANDARD MODELS MODELS See Table 6 for flame safeguard controls and asso ciated amplifiers DETECTOR RESPONSE Responds to infrared radiation with wavelengths between 0 75 and 1 0 micron LEAD SULFIDE PHOTOCELL Photo conductor r...

Страница 2: ... 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 No MP268 Canadian Standards Association certified Master file LR 95329 1 Factory Mutual approved Swiss Re formerly Industrial Risk Insurers acceptable IMPORTANT Caution stickers ...

Страница 3: ... electrical resistance of lead sulfide decreases when exposed to infrared radiation If a voltage is applied across the lead sulfide photocell current flows when the cell is exposed to infrared radiation INSTALLATION WHEN INSTALLING THIS PRODUCT 1 Read these instructions carefully Failure to follow them could damage the product or cause a hazardous condi tion 2 Check the ratings given in the instru...

Страница 4: ...tions below 125 F 52 C the life of the lead sulfide cell should be unlimited The quickest check for excessive temperature is simply to grasp the detector it should not be too hot to hold comfortably in your bare hand Several methods are available for cooling the lead sulfide photocell including ventilating the sight pipe and installing a pipe nipple seal off adapter and or heat block between the s...

Страница 5: ... 7 8 5 9 1 Table 3 Diameter of Area Sighted Through Various Lengths of 3 4 in Pipe Without Orifice in mm Length of Pipe mm Distance From End of Pipe To Sighted Area mm 152 4 304 8 457 2 609 6 762 0 914 4 1066 8 1219 2 1371 6 1524 0 1676 4 1828 8 25 4 160 0 302 3 447 0 589 3 721 4 876 3 Over 1016 0 50 8 88 9 160 0 231 1 302 3 375 9 447 0 518 2 589 3 660 4 734 1 805 2 876 3 76 2 66 0 111 8 160 0 208...

Страница 6: ...Fig 2 and 3 Refractory temperatures in the combustion chamber will vary with combustion chamber design but generally the end wall of the chamber will be the hottest point It will normally be best to aim the detector at the side wall of the refractory Fig 4 at a point above the refractory Fig 5 or at the floor of the combustion chamber Fig 6 SIGHTING SUMMARY When sighting the detector two important...

Страница 7: ...d location Flare the hole Fig 9 to leave room for small adjustments of the sighting angle The taper of the hole should be about 1 in for every 3 in 25 4 mm for every 76 2 mm of wall thickness INSTALLING ACCESSORIES It may be necessary or desirable to install accessories between the sight pipe and the detector This section describes the installation of these accessories SIGHT PIPE VENTILATION It ma...

Страница 8: ...gases install a 105172A Seal Off Adapter Fig 1 The adapter has a glass window that prevents hot gases from reaching the lead sulfide photocell HEAT BLOCK To insulate the detector from sight pipe temperatures above 125 F 52 C install a 105061 Heat Block Fig 1 The device is made of non heat conductive laminated plastic that prevents heat from being conducted from the sight pipe to the detector It ca...

Страница 9: ...dles or channels that contain other wires Rigid metal conduit is preferred when flame detector coaxial cables are extended but flexible metal conduit may be used if it is supported to mini mize movement 3 The flame detector flexible cable shield must be grounded to the flame safeguard control subbase either directly or through the metal cabinet conduit system that contains the flame safeguard cont...

Страница 10: ...tion Also measure the flame signal at high and low firing rates and while modulating in between as applicable With the detector in its final position all required flame signals must be steady and as specified in Table 6 If you cannot obtain the proper signals refer to the Troubleshooting section Fig 12 Measuring 7800 SERIES R7140 Flame Safeguard Control flame signal voltage PILOT TURNDOWN TEST If ...

Страница 11: ...ot work resight the detector at a cooler more distant part of the combustion chamber While resighting the detector remember that it must also properly sight the flame Lengthening the sight pipe or decreasing the pipe size diameter may also be helpful For details refer to Installation Continue adjustments until hot refractory hold in is eliminated IGNITION INTERFERENCE TEST It is possible for infra...

Страница 12: ...it is coated with a substance that cannot be cleaned off replace the 50019469 001 Bushing which includes the focusing lens 3 Clean the inside of the sight pipe before reinstalling the detector 4 If the meter reading is still too low replace the lead sul fide cell Fig 8 5 If the meter reading is still too low replace the plug in amplifier 6 If you still cannot obtain a proper flame signal replace t...

Результаты поиска

Содержание C7915A

Отзывы:

Похожие инструкции для C7915A

Бренды по названию

Популярные бренды

Honeywell C7915A, Информация

Результаты поиска

Содержание C7915A

Отзывы:

Похожие инструкции для C7915A

Бренды по названию

Популярные бренды