Honeywell C7035 User's Manual
Contents
1. C7044 M1944B Fig 3 Installation dimensions of C7044A in in mm C7044A Minipeeper Ultraviolet Flame Detector Flame Detection Housing has two openings to permit either side or end viewing Side viewing is 1 8 as sensitive as end viewing Mounting Bracket included in 4074BVK Bag Assembly secured by two 8 32 RHIS European M 4 screws not included Wiring Connections Two 6 ft 1 83 m color coded NEC Class 1 leadwires Rear of detector has a clamp type connector for 1 2 in flexible metallic conduit Dimensions See Fig 3 C7927A Minipeeper Ultraviolet Flame Detector Ambient Operating Temperature Ratings C7927A1016 U S Version 40 F to 200 F 40 C to 93 C C7927A1008 European Version 4 F to 140 F 20 C to 60 C Storage Temperature Rating 20 F to 120 F 28 C to 49 C Maximum Pressure Rating 5 psi 34 5 kPa Mounting Collar with 1 2 14 NPSM internal threads for mounting on a 1 2 in 13mm sight pipe Wiring Connections Two four foot 1 2 meter color coded NEC Class 1 leadwires Rear of detector has a clamp type connector for 1 2 in 13mm flexible metal conduit Dimensions See Fig 4 and 5 Approvals Underwriters Laboratories Inc cUL MP268 Volume 30 Factory Mutual FM Pending 60 2026 11 C7027A C7035 C7044A C7927A MINIPEEPER ULTRAVIOLET FLAME DETECTORS 1 25 lt _ _ _ ___ 3 3 4 95 _ gt gt 4 F2. amma Ray and X ray Sources Diffraction analyzers Electron microscopes Radiographic X ray machines High voltage vacuum switches High voltage condensers f Radioscotopes Except under unusual circumstances none of these sources except hot refractory and ignition spark would be present in or near the combustion chamber P29TH9Q gt FEO gt 900Tm The detector may respond to hot refractory above 2800 F 1371 C if the refractory surface represents a significant percentage of the field of view of the detector If the temperature of the hot refractory causes the flame relay in the flame safeguard control to pull in re position the sight pipe so the detector views a cooler area of the refractory Ignition spark is a source of ultraviolet radiation When installing the C7027A C7035A C7044A or C7927 Flame Detector make sure it does not respond to ignition spark see Ultraviolet Response Test page 9 If the installation is such that response to the ignition sparks cannot be avoided the Q624A Solid State Ignition Transformer may eliminate the ignition spark response The Q624A when properly installed prevents C7027A C7035A C7044A and C7927 ignition spark response by alternately activating the spark generator and the UV sensing tube 60 2026 11 C7027A C7035 C7044A C7927A MINIPEEPER ULTRAVIOLET FLAME DETECTORS Mounting a C7027A C7927 or C7035A Locate the Sight Pipe The location of the sight pipe is the mos
3. 40 F to 250 F 40 C to 121 C depending on model Maximum Pressure Rating 5 psi 34 5 kPa Mounting Collar with 1 11 1 2 NPSM internal threads for mounting on a 1 in sight pipe The DIN approved C7035A1064 has 1 11 BSP P1 threads Wiring Connections Two 6 ft 1 83 m color coded NEC Class 1 leadwires rated for 302 F 150 C One model is available with 12 ft 3 66 m leadwires Rear of detector has 1 2 14 NPSM internal threads for connecting to a conduit The DIN approved C7035A1064 has 1 2 14 BSP F threads C7035A1056 has 12 ft 3 66 m leadwires C7035A1080 leadwire is rated for 600 F 204 C 6 FOOT 1 83 METER LEADWIRES 2 SR eae MOUNTING BRACKET ar 9 16 ay E a 1 2 a3 a 3 5 8 92 Dimensions See Fig 2 Replacement Parts 129808 Flange Gasket 129464M Ultraviolet Sensing Tube 0 F to 250 F 18 C to 121 C 129464N Ultraviolet Sensing Tube 40 F to 250 F 40 C to 121 C C7027A C7035A AND C7044 Approvals Underwriters Laboratories Inc listed File No MP268 Canadian Standards Association certified Master Report LR 95329 1 Factory Mutual approved Industrial Risk Insurers acceptable DIN approved models C7027A1056 C7035A1049 C7035A1064 General Accessories 118367A Swivel Mount provides adjustable positioning of the C7027A or C7035A 204342 Ultraviolet mirror 3 4 in NPT 105172C Seal off adapter 3 4 in NPT
4. absorbing substances such as smoke excessive moisture or in some instances unburned fuel For a negative pressure combustion chamber drilling a few holes in the section of the sight pipe outside of the combustion chamber will allow air at atmospheric pressure to flow through the sight pipe into the chamber A perforated pipe nipple between the sight pipe and the detector can also be used see Fig 7 For a positive pressure combustion chamber connect a supply of pressurized air from the burner blower through the sight pipe into the chamber The supply air pressure must be greater than the chamber pressure C7027A C7035 C7044A C7927A MINIPEEPER ULTRAVIOLET FLAME DETECTORS Swivel Mount To facilitate proper sighting of the flame a swivel mount part no 118367A is available The swivel mount will require a 3 4 to 1 2 in reducer and a 1 2 in close nipple to mount a C7027A or a 1 in pipe at least 2 1 2 in 63 5 mm long to mount a C7035A For mounting details refer to form 60 0361 for the 118367A Swivel Mount Mount The Detector Fig 7 Mount the detector onto the sight pipe pipe tee nipple or other fitting Make sure the flange gasket is in place inside the mounting collar on the detector and then screw the collar onto the sight pipe or fitting NOTE Ifa window is installed between the UV detector and the flame it must be fabricated from quartz or fused silica Ordinary glass filters out ultraviolet radiat
5. Ox or XX 7 6 FOOT a 2 5 8 67 F193 METER f INSERTION DEPTH LEADWIRES 2 lt XXXX OOOO AN DIN APPROVED C7035A1064 HAS 1 11 BSP P1 INTERNAL MOUNTING THREADS A DIN APPROVED C7035A1064 HAS 1 2 14 BSP F INTERNAL MOUNTING THREADS A C7035A1056 HAS 12 FOOT 3 66 METER LEADWIRES C7035 M1945C Fig 2 Installation dimensions of C7035A in in mm 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 Home and Building Control Sales Office check white pages of your phone directory 2 Home and Building Control Customer Relations Honeywell 1885 Douglas Drive North Minneapolis Minnesota 55422 4386 In Canada Honeywell Limited Honeywell Limit e 35 Dynamic Drive Scarborough Ontario M1V 4Z9 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 60 2026 11 C7027A C7035 C7044A C7927A MINIPEEPER ULTRAVIOLET FLAME DETECTORS C7035A Minipeeper Ultraviolet Flame Detector Flame Detection End viewing Ambient Operating Temperature Ratings 0 F to 250 F 18 C to 121 C or
6. connections from the meter probes to the two ends of the cable connector plug red to red black to black Make these connections before inserting the plug end of the connector plug into the flame jack of the control or control amplifier see Fig 11 Read the flame signal in microamperes directly from the W136A meter Refer to Table 1 for the minimum acceptable flame currents 60 2026 11 C7027A C7035 C7044A C7927A MINIPEEPER ULTRAVIOLET FLAME DETECTORS W136A VOLT OHMMETER 196146 METER CONNECTOR PLUG W136A SELECTOR SWITCH FLAME SIGNAL METER JACK PLUG IN FLAME SIGNAL AMPLIFIER f oe RED CONNECTOR BLACK METER LEAD BLACK CONNECTOR RED METER M6532A Fig 10 Measuring microamp flame signal The R7749B and R7849A B Amplifiers used with the Honeywell BCS 7700 and 7800 SERIES controls respectively have a dc voltage flame signal output For the R7749B Amplifier a volt ohmmeter with a zero to 5 or 10 Vdc scale and a minimum sensitivity of 20 000 volts ohm is suggested For the R7849A B Amplifiers used with the 7800 SERIES controls a volt ohmmeter with a zero to 5 or 10 Vdc scale and a minimum sensitivity of one megohm volt is recommended see Fig 12 POSITIVE A METER LEAD NEGATIVE METER LEAD ae ONE MEGOHM VOLT METER Fig 11 Measuring flame signal voltage of 7800 SERIES controls 60 2026 11 10 Measure the flame signal voltag
7. use an artificial light source to check the response of an ultraviolet detector To check for proper flame detector operation test for flame failure response under all operating conditions Weld The Sight Pipe or Tighten the C7044A Clamp Screw When the flame signal is acceptable after all adjustments are made remove the flame detector and weld the sight pipe in its final position If you are using a swivel mount the pipe may already be welded Then reinstall the flame detector NOTE If using a C7044A Detector with no sight pipe do not remove the detector tighten the clamp screw securely Final Checkout Before putting the burner into service check out the installation using the procedures in the Checkout section of the Instructions for the appropriate flame safeguard control After completing the checkout run the burner through at least one complete cycle to verify correct operation 60 2026 11 C7027A C7035 C7044A C7927A MINIPEEPER ULTRAVIOLET FLAME DETECTORS TROUBLESHOOTING A WARNING Electrical Shock Hazard Can cause serious injury or death Be extremely careful while troubleshooting the detector line voltage is present on some of the terminals when power is on Open the master switch to disconnect power before removing or installing the detector Inadequate Flame Signal If a satisfactory flame signal cannot be obtained while adjusting the sighting position of the detector perform the procedur
8. 7027A in in mm C7027A Minipeeper Ultraviolet Flame Detector Ambient Operating Temperature Ratings 0 F to 215 F 18 C to 102 C or 40 F to 215 F 40 C to 102 C depending on model Maximum Pressure Rating 5 psi 34 5 kPa Mounting Collar with 1 2 14 NPSM internal threads for mounting on a 1 2 in sight pipe Wiring Connections Two 8 ft 2 44 m color coded NEC Class 1 leadwires rated for 221 F 105 C C7027A1064 has 24 ft 7 32 m leadwires Rear of detector has a clamp type connector for 1 2 in flexible metallic conduit Models are available with 1 2 in internally threaded spud connector instead of the clamp C7027A1114 has 44 in 1 118 m leadwires and 22 in 558 mm flexible conduit ORDERING INFORMATION Dimensions See Fig 1 Replacement Part 129685 Flange Gasket NOTE The ultraviolet radiation sensing tube is not field replaceable Accessory 136733 Heat Block laminated plastic insulating the flame detector from sight pipe temperatures up to 266 F 130 C 1 2 14 NPSM external threads on one end and 1 2 14 NPSM internal threads on the other end see Fig 8 Included with C7027A1080 390427B Bushing for mounting to 3 8 in sight pipe Included with C7027A1080 41 8 105 _ 1 2 14 NPSM A COLLAR WITH e 2651 1 11 1 2 NPSM iaie INTERNAL THREADS INTERNAL THREADS A Wiii S XI XX XX 1 1 2 25 38 vor
9. Honeywell C7027A C7035 C7044A C7927A Minipeeper Ultraviolet Flame Detectors M j gt os C7027A I c7035A APPLICATION The C7027A C7035A C7044A and C7927A Minipeeper Ultraviolet Flame Detectors detect the ultraviolet radiation emitted by combustion flames The flame detectors are used with Honeywell flame safeguard controls to provide flame supervision for gas oil or combination gas oil burners FEATURES e C7027A C7035A and C7044A Flame Detectors are used with RA890G devices or R7249A R7290A R7749B and R7849A B Amplifiers and the appropriate Honeywell controls U S Registered Trademark Copyright 2001 Honeywell All Rights Reserved PRODUCT DATA C7044A may also be used with the following 50 Hz Honeywell combustion controls amplifiers R4341 R7323 R4343 R7323 R4344 R7323 C7027A has an integral collar threaded internal 1 2 14 NPSM for mounting on a one half inch sight pipe C7035A has an integral collar threaded internal 1 11 1 2 NPSM for mounting on a one inch sight pipe C7035A housing meets Underwriters Laboratories Inc requirements for rain tightness and complies with NEMA enclosure standards types 4 and 4X C7044A mounts with a two screw bracket The UV sensor tube is enclosed in a stainless steel housing C7044A has the capability of side or end viewing in flame monitoring applications Because of their compact size the C7027A and C7044A are particularly suita
10. OOT 1 2 el LEADWINES 2 gt 3 1 4 82 _ 25 C7927A1016 i 3 11 16 M17783 94 6 1 2 FT 1 g Cs C7927A1008 M17784 Fig 4 Installation dimensions of C7927A1016 U S A version and C7927A1008 European version in in mm INSTALLATION IMPORTANT Ultraviolet radiation sensing tubes have a life expectancy of 40 000 hours of continuous use within H H the flame detector s specified ambient temperature When Installing This Product and voltage ratings Wearout of an ultraviolet 1 Read these instructions carefully Failure to follow radiation sensing tube results in failure of the UV them could damage the product or cause a hazardous sensor to properly discriminate between flame condition conditions 2 Check the ratings given in the instructions and on the product to make sure the product is suitable for your The C7027A C7035A and C7044A Flame Detectors application should only be used on burners that cycle on off 3 Installer must be a trained experienced flame periodically or in the absence of cycling are safeguard control technician periodically checked for proper operation 4 After installation is complete check out product __ operation as provided in these instructions _ Recommended industry standards for the frequency Disconnect power supply before beginning installation to of sensor checks either through cycling employing prevent electrical shock and equipment damage All wiring safe start
11. ble for blast tube mounting Properly installed the C7027A C7035A and C7927 are pressure rated for 5 psi C7035A ultraviolet radiation sensor tube is field replaceable Two C7027A C7035A or C7044A Flame Detectors can be wired in parallel for difficult flame sighting installations C7927A is used with only the R7851B Flame Amplifier and the 7800 SERIES controls C7927A has an integral collar threaded internal 1 2 14 NPSM for mounting on a one half inch sight pipe Contents Application vse ii teens eii ans 1 FOAtureS sscccsussrecte es cesescug E E ates sstereenaee 1 Specifications 2 s csa ccd sec ei aa 2 Ordering Information 0 0 eee eeeeeeeeeeeeeenneeeeeeeeeenneeeeeaes 2 Wiring All Models Fig 10 essersi 8 Adjustments and Checkout 0 cc eeeeceeesseeeeeteeeeenneeeeeneees 9 Troubleshooting arr eae rae aerea E a eas 12 Maintenance E E NE TE 12 60 2026 11 C7027A C7035 C7044A C7927A MINIPEEPER ULTRAVIOLET FLAME DETECTORS SPECIFICATIONS 4 102 _ gt 8 FOOT 2 44 METER LEADWIRES 2 m 3 1 2 89 Vig A Or A C7027A1064 HAS 24 FOOT 7 32 METER LEADWIRES C7027A1114 HAS 44 IN 1 118 M LEADWIRES WITH 22 IN 558 MM FLEXIBLE CONDUIT MODELS AVAILABLE WITH SPUD CONNECTOR 1 2 14 NPSM INTERNAL THREADS INSTEAD OF CLAMP TYPE CONNECTOR i COLLAR WITH 1 2 14 NPSM INTERNAL THREADS C7027 M1943E Fig 1 Installation dimensions of C
12. check methods or periodic maintenance must comply with applicable electrical codes ordinances vary between once every ten seconds and once and regulations Use NEC Class 1 wiring every week depending on the standard used and the application needs Consult the equipment manufacturer or the governing standard for recommendations about frequency of checks Controls incorporating safe start checks and sensors and controls employing constant check means are available from Honeywell See your Honeywell representative for specific information 60 2026 11 4 C7027A C7035 C7044A C7927A MINIPEEPER ULTRAVIOLET FLAME DETECTORS A WARNING Explosion Hazard and Electrical Shock Hazard Can cause serious injury death or property damage 1 The C7027A C7035A C7044A and C7927 Flame Detectors must be used with Honeywell flame safeguard controls primaries programmers multiburner systems and burner management systems Using with controls not manufactured by Honeywell could result in unsafe conditions 2 Disconnect power supply before beginning installation to prevent electrical shock or equipment damage more than one disconnect may be involved 3 Read the installation instructions before starting the installation 4 All wiring must be NEC Class 1 line voltage 5 The flame detector must be positioned so that it sights the flame and does not respond to the UV radiation emitted by sparks generated by a spark ignitor T
13. der positive pressure The C7027 or C7035 should be used if internal pressure sealoff is required 60 2026 11 C7027A C7035 C7044A C7927A MINIPEEPER ULTRAVIOLET FLAME DETECTORS 8 32 RHIS EUROPEAN M 4 SCREW 2 MOUNTING BRACKET C7044A DETECTOR 29 32 IN 23 0 mm MOUNTING HOLE IN BLAST TUBE Yay Nes 1 27 64 IN 36 1 mm M3020 Fig 8 Mounting C7044A Detector on blast tube The C7044 is mounted in a 29 32 in 23 0 mm hole in the blast tube The mounting bracket is fastened to the blast tube with 2 screws on 1 27 64 in 36 1 mm centers The mounting bracket is designed so that the detector can be removed from the blast tube for cleaning and then replaced without disturbing the sighting angle Loosen the 2 screws holding the bracket to the blast tube but do not loosen the clamp screw on the bracket Twist both the bracket and detector to remove them 60 2026 11 8 WIRING ALL MODELS FIG 10 CAUTION Equipment Damage Hazard Can cause improper operation The blue tan with blue tracer with C7035A1080 leadwire must be connected to the F terminal of the flame safeguard control subbase or terminal strip and the white tan leadwire without blue tracer with C7035A1080 to the G terminal see Fig 10 Failure to observe the circuit polarity by reversing the leadwires even momentarily may cause the flame detector to improperly supervise the combustion flame IMPORTANT All w
14. e as illustrated in Figs 12 and 13 Be careful to connect the positive meter lead to the positive amplifier jack and the negative meter lead to the negative amplifier jack BCS 7700 or the Com jack for a 7800 SERIES control If the BCS 7700 and Series 7800 controls have the optional Keyboard Display Module a zero to five Vdc reading will be displayed on the module Move the flame detector and sight pipe if not permanently attached to the burner boiler to view the flame from various positions Allow a few seconds for the meter reading to stabilize A maximum steady microamp or voltage reading is desirable The flame signal must be above the minimum acceptable level for the flame safeguard control and associated amplifier as indicated in Table 1 Measure the flame signal for the pilot alone the main burner flame alone and both together unless monitoring pilot only when using an intermittent pilot or supervising the main flame only when using direct spark ignition Also measure the flame signal at low and high firing rates and while modulating if applicable With the flame detector in its final position all flame signals must be steady with a current voltage value as indicated in Table 1 If the minimum signal cannot be obtained or is unstable refer to Troubleshooting page 10 Pilot Turndown Test If the detector is used to prove a pilot flame before the main fuel valve can be opened perform a Pilot Turndown Test Fo
15. elding the C7027A C7927A or C7035A sight pipe in its final location or before tightening the C7044A clamp screw complete both the adjustments and checkout tests that follow and any required by the burner manufacturer Uv Sensor Tube Test NOTE For initial burner lightoff consult the burner manufacturer instructions or the instructions for the flame safeguard control During the initial burner lightoff make sure the flame safeguard control starts i e the load relay usually 1K pulls in If it does not start visually check the sensing tube in the C7027A C7035A or C7044A flame detector If the tube continues to glow when no flame is present replace the sensing tube C7035A or replace the detector C7027A or C7044A Adjust Detector Sighting Position With the flame detector installed and burners running adjust the position of the flame detector for optimum flame signal The flame signal will be read in microamps or voltage Vdc depending on the Honeywell flame safeguard combustion control used Most existing Honeywell flame safeguard controls incorporate a flame current jack on the flame amplifier or on the control itself The flame signal can be measured with a volt ohmmeter such as the Honeywell W136A To measure the flame current signal use a cable connector part number 196146 included with the W136A in conjunction with the meter With the W136A or equivalent positioned at the zero to 25 microampere scale make
16. es indicated in steps 1 through 7 If other difficulties are encountered in the system refer to Troubleshooting in the Instructions for the appropriate Honeywell flame safeguard control 1 Check for proper line voltage Make sure the master switch is closed connections are correct and power supply is the correct voltage and frequency 2 Check the detector wiring for defects including incorrect connections wiring type or size of wire deteriorated wire open circuits short circuits leakage paths caused by moisture soot or dirt 3 With the burner running check the temperature at the detector When it exceeds 215 F 102 C for a C7027 C7927 or C7044 or 250 F 121 C for a C7035 a use a heat block part no 136733 if using a C7027A Flame Detector b add the additional insulation between the wall of the combustion chamber and the detector c add a shield or screen to reflect radiated heat away from the detector or d add cooling refer to Sight Pipe Ventilation page 6 4 Remove the detector and clean the viewing window with a soft clean cloth PAO TD 5 Clean the inside of the sight pipe if one is used before reinstalling the detector 6 Ifthe flame signal continues to be too low replace the plug in amplifier if the control has one 7 Ifyou still cannot obtain a proper flame signal replace flame detector C7027A C7044A or UV radiation sensing tube C7035A IMPORTANT At the completio
17. facturer before making any modifications to the installation In locations where water is usually sprayed on the body of the detector use a C7035A Internal threads in its base permit the use of waterproof flexible conduit for this type of application Prepare Hole In Wall Of Combustion Chamber Cut a hole of the proper diameter for the sight pipe in the wall of the combustion chamber at the selected location Flare the hole 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 mm for every 76 mm of wall thickness 60 2026 11 6 Mounting The Sight Pipe Fig 6 Thread one end of the pipe to fit the mounting collar on the detector Cut the pipe to the desired length as short as practicable and at an angle so it fits flush with the wall of the combustion chamber Tack weld the pipe to the wall in a trial position Do not permanently weld the sight pipe in place until after completing the Adjustments and Checkout beginning on page 7 NOTE If you use a swivel mount part no 118367A and you are positive about the location and sighting angle you can permanently weld the pipe TEMPORARY TACK WELD FLARED HOLE BLACK IRON SIGHT PIPE BOILER N PLATE Fig 5 Mounting sight pipe REFRACTORY M3019A Sight Pipe Ventilation It may be necessary to ventilate the sight pipe to cool the flame detector or to clear the sight pipe of UV radiation
18. he Q624A Solid State Igniter may be useful in difficult installations Basic Requirements For Ultraviolet Detector Installations All flames emit ultraviolet radiation invisible to the human eye but detected by the UV sensing tube There are two important factors in UV detector installation The detector must have a line of sight view of the flame The detector must not be exposed to other sources of ultraviolet radiation the most common being ignition spark Other sources are listed in the next section Because it is necessary for the detector to actually see the flame it is desirable to locate the detector as close to the flame as physical arrangement and temperature restrictions permit Sighting requirements for different types of flame supervision are 1 Pilot flame only Sighting must be along the axis of the pilot flame The smallest pilot flame that can be sighted must be capable of igniting the main burner see Pilot Turndown Test page 9 2 Main flame only Sighting must be at the most stable part of the flame for all firing rates 3 Pilot and main flame Sighting must be at the junction of both flames Other Radiation Sources Sensed By The UV Detector Examples of radiation sources other than flame that could actuate the detection system are 1 Ultraviolet Sources Hot refractory above 2800 F 1371 C Spark Ignition transformers Welding arcs Lightning Gas lasers Sun lamps Germicidal lamps
19. ion Using a Heat Block With a C7027 Fig 8 If the temperature of the sight pipe will become high enough to cause the C7027A to overheat above 215 F 102 C up to 266 F 130 C screw a 136733 Heat Block order separately onto the sight pipe before mounting the detector ee C7027A OR C7035A FLANGE a GASKET ADD PIPE TEE PERFORATED NIPPLE OR OTHER on Bee SUITABLE DEVICE y FOR VENTILATION W IF REQUIRED X SP COMBUSTION CHAMBER WALL M3021 Fig 6 Mounting a C7027A or C7927A ona combustion chamber viewed from above C7035A mounting is similar 136733 HEAT BLOCK 5 12 41 C7027A DETECTOR patel j ba git jt 4 102 gt S04 1 2 INCH SIGHT PIPE A 1 14 32 Y 1 2 14 NPSM 1 2 14 NPSM 2 14 NPSM INTERNAL EXTERNAL INTERNAL THREADS THREADS THREADS HIGH TEMPERATURES ABOVE 215 F 102 C DO NOT USE FOR TEMPERATURES ABOVE 266 F 130 C M1942 Fig 7 Mounting dimensions of 136733 Heat Block in in mm Mounting a C7044A On a Blast Tube Fig 9 The C7044 is designed to be mounted on the blast tube of a burner The exact location should be determined by the burner manufacturer Contact the manufacturer before making any modifications to the installation A WARNING Explosion Hazard Can cause serious injury or property damage The C7044 will allow air leakage through its housing Do not locate the C7044 in an atmosphere of fuel vapors un
20. iring must comply with applicable local electrical codes ordinances and regulations Use NEC Class 1 wiring The detector has color coded and labeled plastic insulated no 18 AWG leadwires eight ft 2 44 m long rated for 221 F 105 C 1 Keep the flame signal leadwires as short as possible from the flame detector to the terminal strip or wiring subbase Capacitance increases with wire length reducing the signal strength NOTE The maximum permissible leadwire length depends on the type of leadwire and the conduit type and diameter The ultimate limiting factor in flame signal leadwire length is the signal current or voltage at the flame safeguard device See Table 1 2 If needed splice detector leadwires for longer leadwire runs observing the following considerations a Make required splices in a junction box b Use moisture resistant no 14 wire suitable for at least 167 F 75 C c For high temperature installations use Honeywell Specification no 32004766 003 or equivalent for the F leadwire This wire is rated up to 400 F 250 C for continuous duty It is tested for operation up to 20 Kv and for breakdown up to 35 Kv For the other leadwires use moisture resistant no 14 wire selected for a temperature rating above the maximum operating temperature d F and G wires must be run in their own conduit independent of other power carrying leadwires More than one scanner F and G wire can be run in the same cond
21. led 60 2026 11 GR Rev 07 01 amp paper containing at least 10 www honeywell com bbe post consumer paper fibers
22. ll in or the flame LED should not light The flame signal should not be more than 0 25 microamp or 1 25 Vdc with the BC7700 or 7800 SERIES 3 Ifthe flame relay does pull in or the flame LED lights reposition the flame detector to increase the distance between the flame detector and the ignition spark If the flame detector is not in the line of sight of the ignition spark but appears to respond to the spark it may be responding to reflected spark generated UV radiation If so relocate the flame detector so it does not receive the reflected UV radiation It may be necessary to construct a barrier to block the UV radiation generated by the spark from the flame detector view 4 Continue making the adjustments until the flame signal due to ignition spark is less than 0 25 microamp or 1 25 Vdc 5 The use of the Q624 or Q652 solid state ignition transformer may also provide a method to eliminate the C7027A C7035A or C7044A flame detector response to UV radiation generated by ignition spark The Q624 and Q652 prevents flame detector response to ignition spark by providing alternating periods of spark generation and UV sensor activation If ignition spark is detected try reversing the leads on the Q624 or Q652 11 Response to Other Ultraviolet Sources Some sources of artificial light produce small amounts of ultraviolet radiation Under certain conditions an ultraviolet detector will respond to them as if it is sensing a flame Do not
23. llow the procedures in both the Instructions for the appropriate flame safeguard control and in the burner manufacturer s instructions VOLT OHMMETER AMPLIFER PROBES METER BCS 7700 CHASSIS MODULE FOOTMOUNT M7860 Fig 12 Measuring the BCS 7700 flame signal voltage Table 1 Flame Signal Honeywell Flame Minimum Acceptable Maximum Current Minimum Maximum Flame Plug in Safeguard Steady Current Expected Acceptable Voltage Detector Amplifier Control microamps microamps Voltage Vdc Vdc C7027A R7249A BC7000 PM720 3 5 7 5 C7035A i R7749B BCS7700A 2 2 4 98 C7044A AMPLICHECK R7249A R4075C D E2 3 5 7 5 R4138C D 3 5 7 5 R4140G L M 3 5 7 5 R7290A R4795A D2 1 5 2 25 None R7023C 1 5 2 25 NONE R7795A C E G 1 5 2 25 R7849A or 7800 SERIES 1 25 5 0 R7849B AMPLICHECK None RA890G 1 5 2 25 C7927A R7851B 7800 SERIES 1 25 5 0 a Currently obsolete Ignition Spark Response Test Test to be sure that ignition spark is not actuating the flame relay usually 2K or flame LED in the flame safeguard control 1 Close the pilot and main burner manual fuel shutoff valves 2 Connect the appropriate meter to the flame safeguard control amplifier Start the burner and run through the ignition period Ignition spark should occur but the flame relay must not pu
24. n of troubleshooting be sure to perform the Adjustments and Checkout beginning on page 8 MAINTENANCE Periodic Maintenance 1 Clean the viewing window and sight pipe if used when necessary Remove the detector and use a soft clean cloth to remove accumulated contaminants from the UV radiation sensor tube glass envelope 2 Ultraviolet sensing tubes have a life expectancy of 40 000 hours of continuous use within the ambient temperature and voltage ratings Replace the sensing tube in the C7035 or replace the C7027 C7927 or C7044 Detector at appropriate intervals 3 Keep the flame detection system adjusted for the smoothest most reliable operation as recommended by the burner manufacturer Cleaning the C7044A Detector When necessary clean the C7044 Flame Detector by using the following procedure 1 Loosen the two screws holding the C7044 mounting bracket to the blast tube To remove twist the bracket and detector Do not loosen the clamp screw that holds the mounting bracket to the detector 2 Clean the viewing window with a soft clean cloth 3 Insert the detector into the mounting hole and to realign it twist against the mounting screws Tighten the two mounting screws Honeywell Home and Building Control Home and Building Control Honeywell Limited Honeywell Limit e 35 Dynamic Drive Scarborough Ontario Honeywell 1985 Douglas Drive North Golden Valley MN 55422 MIV 4Z9 Printed in U S A on recyc
25. t critical part of the installation A black iron pipe is recommended Do not use a stainless steel or galvanized pipe because its internal surface blackens with use as deposits from the combustion chamber settle on it Initially its shiny internal surface reflects ultraviolet radiation which could result in a satisfactory flame signal even though the pipe may be improperly located As it blackens less ultraviolet radiation is reflected and the flame signal may become marginal Under optimum sighting conditions the C7027A C7927 and C7035A Flame Detectors can detect most common gas and oil combustion flames at a distance of six feet The critical factors in determining the flame detector distance separation are the optimized flame signal current or voltage and the flame detector temperature Other factors may be influential and are associated with the specific installation For minimum flame signals see Table 1 and for ambient operating temperatures refer to Specifications page 2 Use 1 2 in pipe for a C7027 or C7927 and 1 in pipe for a C7035 Since no two situations are likely to be the same length and sighting angle of the pipe must be determined at the time and place of installation Generally it is desirable to have the sight pipe tilting downward to prevent soot or dirt buildup If a C7027A or C7927A is to be used for a blast tube installation its location should be determined by the burner manufacturer contact the manu
26. tectors loses the flame signal the other will continue to indicate the presence of the flame and keep the burner in operation When the flame detectors are connected in parallel the low level background signals are additive Therefore no more than two C7027A C7035A or C7044A Flame Detectors should be paralleled Furthermore the background signal increases as temperature decreases Because of this the minimum ambient operating temperature must be increased when the C7027A C7035A or C7044A Flame Detectors are paralleled When using detectors rated for a minimum of 0 F 18 C limit the minimum ambient temperature at the detectors to 32 F 0 C When using detectors rated for a minimum of 40 F 40 C limit the minimum ambient temperature at the detectors to 10 F 23 C Connect the blue leadwires of both detectors to the F terminal of the wiring subbase or terminal strip and the white leadwires of both detectors to the G terminal as shown in Fig 10 Earth Ground The detector and the flame safeguard control must be connected to earth ground A convenient method of accomplishing this is to connect the detector to the flame safeguard control with a flexible conduit or ensure a good ground connection at the mounting bracket WIRING SUBBASE OR TERMINAL STRIP OPTIONAL SECOND DETECTOR M3018 Fig 9 Wiring C7027A C7035A and C7044A flame detectors in parallel ADJUSTMENTS AND CHECKOUT Before w
27. uit e A shielded twisted pair wire may be substituted for using conduit for routing the F leadwire Be advised of the capacitance per foot of shielded wire effectively reduces the flame signal at the flame safeguard device Be sure to ground the shield to the G terminal at the flame safeguard wiring subbase f The detector wires need to be run in their own conduit as well avoiding other electrical noise carrying wiring C7027A C7035 C7044A C7927A MINIPEEPER ULTRAVIOLET FLAME DETECTORS g The scanner wires should remain separated a minimum of two in 51 mm from other line voltage wires in the main control panel to the flame safeguard device 3 Avoid installation considerations that can influence detector operation and maximum leadwire length such as Moisture Ignition interference High resistance connections poor grounds Leadwire capacitance Voltage fluctuations Induced line transients Floating grounds ground at some voltage above earth ground No G wire burner used as ground Detector output less than maximum attainable for the installation inadequate sighting sz Q 9290To 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 flame detectors connected in parallel will reduce the occurrence of nuisance shutdowns If only one of the parallel de
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