Honeywell Switch L404T User's Manual
Contents
1. CONTROLLER 4 1 2 TO 5 1 2 114 TO 140 14026 SIPHON LOOP TEE PREHEATED OIL SUPPLY LINE A 1 4 INCH BLACK IRON PIPE WITH 1 4 18 NPT EXTERNAL THREADS ON BOTH ENDS AND 2 1 4 IN 57 MM DIAMETER LOOP hit7aBRA Fig 5 Mounting of a siphon loop with approximate dimensions in in mm WIRING A WARNING Electrical Shock Hazard Can cause severe injury death or property damage Disconnect the power supply before beginning wiring More than one power supply disconnect may be required L404F PRESSURETROL L1 POWER HOT SUPPLY AY 24 VOLT POWER SUPPLY A PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED A AS SHOWN SWITCH OPENS ON PRESSURE RISE REVERSE ACTING MAKE ON PRESSURE RISE UNITS ARE WIRED TO R W TERMINALS AND TERMINAL B IS OMITTED Wiides7A Fig 6 L404F in low voltage relay circuit LINE VOLTAGE THERMOSTAT L404F PRESSURETROL L1 L2 HOT POWER SUPPLY A PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED A AS SHOWN SWITCH OPENS ON PRESSURE RISE REVERSE ACTING MAKE ON PRESSURE RISE UNITS ARE WIRED TO R W TERMINALS AND TERMINAL B IS OMITTED M19638A Fig 7 L404F in a typical 2 wire control circuit 71 2429 2 L404F T V PRESSURETROL CONTROLLERS R Ww B OMITTED L404T BREAKS ON PRESSURE MAKES ON PRESSURE L404V RISE TO SET POINT RISE TO SET POINT M1801B Fig 8 L404T V terminal blocks2. 300 140 to 345 20 to 50 2410 350 L404F1409 15 to 100 2 to 15 15 to 40 2to6 170 25 L404T1055 35 to 350 5 to 50 40 to 100 6 to 14 590 85 L404T1063 70 to 1035 10 to 150 70 to 150 10 to 22 1550 225 L404V 10874 70 to 1035 10 to 150 70 to 150 10 to 22 1550 225 L404V10959 35 to 350 5 to 50 40 to 100 6 to 14 590 85 a Nominal at midscale operating range gt Brass bellows instead of stainless steel diaphragm Models with 1 4 19 BSPT thread instead of 1 4 18 NPT thread 4 Make on rise models with terminal B omitted for miswiring compliance 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 Automation and Control Products Sales Office check white pages of your phone directory 2 Honeywell Customer Care 1885 Douglas Drive North Minneapolis Minnesota 55422 4386 In Canada Honeywell Limited Honeywell Limit e 35 Dynamic Drive Scarborough Ontario M1V 429 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 71 2429 2 2 L404F T V PRESSURETROL CONTROLLERS Table 2
3. Conversion Table Pressure Sensing Element Stainless steel diaphragm 140 to 2070 kPa models has brass bellows Maximum Ambient Temperature 66 C 150 F Also refer to note under Mounting Adjustment Means Screws on top of control case Scales are marked in psi or kPa A 3 1 4 83 Lat 2 3 4 70 DIFFERENIAL ADJUSTMENT SCREW 3 7 8 99 HOLE FOR 1 2 INCH CONDUIT m 1 3 16 PSI RANGE DIMENSION A SEE TAB DIMENSION A Operating Range Conversions Subtractive Differential Conversions kg cm kPa psi kg cm kPa psi 0 1 to 1 05 15 to 100 2to 15 0 15 to 0 4 15 to 40 2to6 0 4 to 3 5 35 to 350 5 to 50 0 4 to 1 0 40 to 100 6 to 14 0 7 to 10 0 70 to 1035 10 to 150 0 7 to 1 6 70 to 150 10 to 22 1 5 to 20 0 140 to 2070 20 to 300 1 5 to 3 5 150 to 300 20 to 50 Table 3 Switch Ratings Amperes Mounting Means 1 4 inch 18 NPT connection on diaphragm Switch State 120 Vac 240 Vac assembly or surface mounts using holes in back of case Full Load 8 0 5 1 Dimensions See Fig 1 Locked Rotor 48 0 30 6 Switching Action Snap switch breaks R B closes R W on pressure rise Make on rise devices omit terminal B Grounding Means Ground screw terminal marked with a circled ground symbol Accessories 14026 Steam Trap 118023 for BSPT models 33312B Knurled Knob fits on top of adjusting screws 129564 Ran
4. and internal schematics OIL PRESSURE MAIN OIL VALVE CONTROLLER SOLENOID FLAME SAFEGUARD CONTROL Fig 9 Hookup of an oil pressure controller used on a single burner system with an integral oil pump OTHER CONTROLLERS LIMITS AND INTERLOCKS OIL PRESSURE CONTROLLER FLAME SAFEGUARD CONTROL L1 HOT L2 M9790 Fig 10 Hookup of an oil pressure controller used on a single burner or multiburner system with an external oil pump SETTINGS AND ADJUSTMENTS When the pressure at the control rises above the L404 setpoint a circuit opens between the R B terminals During a pressure fall R B will close at the setpoint pressure minus the switch differential For example if a controller is set to differential B see Fig 11 with a controller setpoint of A R B will open when the pressure rises to A Then during a pressure fall the R B terminals will close when the pressure drops to C A minus differential B For make on rise applications the switch is wired to R W terminals The R W circuit will close on pressure rise to the setpoint R W will open again on a pressure drop past the switch differential 71 2429 2 6 B R BREAKS R W MAKES ADJUSTABLE j B DIFFERENTIAL c B R MAKES R W BREAKS B R W SWITCH ACTION ON PRESSURE FALL SWITCH ACTION ON PRESSURE RISE INDICATES CLOSED SWITCH CONTACTS M19639B Fig 11 Operation of switch on pressure rise and fall S
5. connections in accordance with approved standards Use only a small amount of pipe compound to seal the connection joints Excess pipe compound may clog the orifice in the pipe fitting and prevent the controller from operating properly L ATOMIZER LINE MANUAL SHUTOFF olL LOW OIL LOW OIL HIGH OIL TO OIL VALVE PUMP WITH PRESSURE TEMPERATURE RECIRCULATING PRESSURE MANUAL BURNER PRESSURE RELIEF CONTROLLER VALVE AND SAFETY CONTROLLER SHUTOFF SHUTOFF VALVE VALVE ATOMIZING MEDIUM AIR OR STEAM M17861 Fig 3 Typical locations of pressure controllers in an oil burner system 71 2429 2 4 L404F T V PRESSURETROL CONTROLLERS OIL PRESSURE All wiring must comply with applicable codes and ordinances All models have terminals on the MicroSwitch snap acting switch inside the cover and knockouts for conduit and cable Refer to manufacturer installation and wiring instructions if available and to typical hookups shown in Fig 6 to 10 CONTROLLER AT RIGHT ANGLES TO THE MAIN PIPE LINE Pg HEXAGONAL FITTING PIPE NIPPLE Q MAIN TEE TURN TO LEVEL THE CONTROLLER MAIN PIPE LINE M17860 Fig 4 Mounting an oil pressure controller directly on the main pipe Using with Preheated Oil When used with preheated oil a siphon loop part number 14026 must always be connected between the controller and the main pipe see Fig 5 to provide thermal buffering OIL PRESSURE
6. Honeywell L404F 1 V PressureTrol Controllers o oo m Pst PSI so cm Dive is Susteactive APPLICATION L404F PressureTrol Controllers provide operating control with automatic limit protection for pressure systems of up to 2070 kPa or 300 psi L404T V PressureTrol Controllers are for use on oil burner systems for pressures up to 1035 kPa or 150 psi U S Registered Trademark 2004 Honeywell International Inc All Rights Reserved PRODUCT DATA FEATURES e Models available in a series of control ranges and pressure scales in kPa and psi e All models automatically reset and have an adjustable differential e Models have snap switch to open or close a circuit on a pressure rise e Case has a clear plastic cover so setpoints can be observed e 1 4 inch 18 NPT connection for pipe on diaphragm assembly e Ground screw terminal L404F e Controllers may be used with steam air or noncombustible gases or fluids noncorrosive to the pressure sensing element L404T e High pressure limits break a circuit on oil pressure rise above setpoint L404V e Low pressure limits makes a circuit on oil pressure rise above setpoint Contents ApDIICAtIOM tne 1 EE essccgereenesntaattenedetendeerendteeaeeratie 1 SPSCIICALIONS iaiaeiaeiaa akera taa atat 2 Ordering Information cccceccccseceseseeeeseeeeeseneeseseeeeneees 2 IMStAN ATION secesnces hice cs cos cteeaesecessoceessstenesc
7. etpoint Adjustment Turn the pressure adjusting screw on the top of the controller Fig 12 to adjust the setpoint Turn the differential adjusting screw to the desired pressure difference between switch opening and switch closing NOTE When the main scale setting is at the lower end of the operating range the differential range will be less than the differential setting by approximately 20 percent peed SCREW PRESSURE ADJUSTING SCREW SCALEPLATES GROUND SCREW MAIN SCALE PRESSURE INDICATOR DIFFERENTIAL SETTING INDICATOR DIAPHRAGM L OPERATING ASSEMBLY LEVER M19640A Fig 12 view of L404 PressureTrol Controller Scaleplate Adjustment The L404F T V has been carefully calibrated during manufacture and should not require recalibration However if recalibration is necessary remove the cover and loosen the setscrews which hold the scaleplate Adjust the plate up or down as required to bring the device into calibration Tighten the setscrews securely and replace the cover L404F T V PRESSURETROL CONTROLLERS CHECKOUT After the controller has been installed wired and adjusted it should be tested with the system in operation First allow the system to stabilize Then observe the operation of the controller while raising and lowering its setpoint Pressure should increase when the setpoint is raised and decrease when the setpoint is lowered Also check the make and break points of the contro
8. ge Stop range stop screw Part No 107194 and wrench Part No 23466 to limit setpoint range e 4 4 2 115 ha 411 32 111 gt lt 1 61 64 50 gt 1 15 16 49 MAIN SCALE ADJUSTMENT SCREW 3 16 X 11 32 5 X 9 KNOCKOUT 27015 123 5 TO 50 10 TO 150 126 126 1 13 16 20 TO 300 146 13 16 21 CLEAR PLASTIC COVER 1 1 16 enja Kt 1 1 2 38 A 15 TO 100 kPa 2 TO 15 PSI SCALE MODELS ONLY REAR VIEW M19635B Fig 1 L404F T V approximate dimensions in inches millimeters in parentheses 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 on the ratings given in the instructions and marked on the product to make sure the product is suitable for your application 3 Installer must be a trained experienced service technician 4 After installation is complete check out the product operation as provided in these instructions 71 2429 2 L404F T V PRESSURETROL CONTROLLERS IMPORTANT When making pipe connections use pipe dope sparingly to seal the joints any excess dope may clog the small hole in the fitting and prevent the controller from operating properly Location and Mounting L404F Locate the L404F where t
9. he ambient temperature will not exceed 66 C 150 F The L404F can be mounted near the pressure gauge at a remote location in a fitting provided by the boiler manufacturer or in a special mounting on low water cutoffs The L404F should always be mounted above the water line in steam boiler applications NOTE For accurate operation supplemental heat should be added to installations where temperatures fall below 29 C 20 F A steam trap must be connected between the L404F and the boiler see Fig 2 to prevent boiler scale and corrosive vapors from attacking the elbows or diaphragm PRESSURE PRESSURE GAUGE A CONTROLLER J 14026 A STEAM TRAP 4 1 2 TO 5 1 2 SIPHON LOOP 114 3 TO 139 7 A 1 4 IN BLACK IRON PIPE WITH 1 4 18 NPT EXTERNAL THREADS ON BOTH ENDS AND 2 1 4 IN DIAMETER LOOP M8934B Fig 2 Steam trap mounting Pressure Gauge Mounting To mount beside a pressure gauge remove the gauge and install in its place the steam trap with a tee on top Mount the PressureTrol unit and pressure gauge on the side of the tee by means of nipples and elbows see Fig 2 STRAINER Remote Mounting Excessive vibration at the boiler may affect the operation of the L404F In these cases the L404F should be remotely located subject to the following 1 All piping must be suitable and properly pitched to drain all condensation back to the boiler 2 The remote mounting must be solid 3 A stea
10. ller If they do not agree with a separate accurately calibrated pressure gauge a slight adjustment of the scaleplate s may be necessary Use accurate pressure testing equipment when checking out the controller Do not rely on inexpensive gauges The controllers are carefully calibrated at the factory 71 2429 2 Honeywell Automation and Control Solutions Honeywell International Inc Honeywell Limited Honeywell Limit e 1985 Douglas Drive North 35 Dynamic Drive Golden Valley MN 55422 Scarborough Ontario M1V 429 Printed in U S A on recycled 71 2429 2 GR Rev 09 04 amp paper containing at least 10 post consumer paper fibers www honeywell com
11. m trap must be used at one end of the piping Boiler Mounting If it is not convenient to mount the L404F adjacent to the pressure gauge install a steam trap at the location recommended by the boiler manufacturer then screw the device directly to the steam trap Location and Mounting L404T V Location NOTE For most accurate operation supplemental heat should be added to installations where the temperature falls below 20 F 29 C These controllers can be mounted at any location in the oil supply line depending on the application Typical locations are shown in Fig 3 The low oil pressure controller should be located upstream from the safety shutoff valve s In a downstream location there would be zero pressure when the burner is not running and the safety shutoff valve s is are closed This could prevent startup or require manual reset every time the burner is started The high oil pressure controller should be located as near to the burner as possible Mounting Mount the oil pressure controller directly on the main pipe Insert a tee in the pipe line and connect a pipe nipple of appropriate size to the tee see Fig 4 Screw the hexagonal fitting 1 4 18 NPT internal thread of the pressure controller to the pipe nipple To avoid leaks and damage to the case use a parallel jaw wrench on the hexagonal fitting close to the pipe nipple Do not tighten the pressure controller by hand by holding the case Make all pipe
12. ntesdebesabeerbesseddessteds 3 Settings and Adjustments ieee 6 CRECKOUL coi scdecstdeccders cevesgaies astenadvent cvdecienavoreessctveseezesues 7 71 2429 2 L404F T V PRESSURETROL CONTROLLERS SPECIFICATIONS Model L404F T V PressureTrol Controllers See Table 1 Table 1 Models with kPa psi Maximum Diaphragm Operating Ranges Subtractive Differential pressure Model Number kPa psi kPa psi kPa psi L404F 1060 15 to 100 2 to 15 15 to 40 2 to6 170 25 L404F 1078 35 to 350 5 to 50 40 to 100 6 to 14 590 85 L404F 1094 140 to 2070 20 to 300 140 to 345 20 to 50 2410 350 L404F 1102 70 to 1035 10 to 150 70 to 150 10 to 22 1550 225 L404F1219 15 to 100 2to 15 15 to 40 2 to6 170 25 L404F1243 35 to 350 5 to 50 40 to 100 6 to 14 590 85 L404F1227 70 to 1035 10 to 150 70 to 150 10 to 22 1550 225 L404F1235 140 to 2070 20 to 300 140 to 345 20 to 50 2410 350 L404F1300 415 to 1240 60 to 180 40 fixed 6 0 Fixed 1550 225 L404F 1326 0 to 100 0 to 15 15 to 40 2 to6 170 25 L404F 1334 0 to 350 0 to 50 40 to 100 6 to 14 590 85 L404F 1342 35 to 1000 5 to 145 70 to 150 10 to 22 1550 225 L404F 1359 70 to 2000 10 to 290 140 to 345 20 to 50 2410 350 L404F 1367 7 to 55 1 to 8 5 to 14 0 75 to 2 170 25 L404F1375 35 to 350 5 to 50 40 to 100 6 to 14 590 85 L404F 13834 70 to 1035 10 to 150 70 to 150 10 to 22 1550 225 L404F1391 140 to 2070 20 to
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