L7148F Electronic Aquastat Controller

Transcription

1 L78F Electronic Aquastat ontroller FEATUES PODUT GENEAL L78F WITH QUIK ONNETS (SENSO T INLUDED) L78F WITH PLUG ONNETIONS (SENSO T INLUDED) Available with quick connect or AMP plug connections. T, TV and Z terminals are provided in a terminal block with screw connections. Vent damper plug optional. Separate high limit control not required. Software defined minimum/maximum limit settings. External 0 Vac to Vac transformer, ordered separately, is field replaceable and upgradable. Patented limit rated 099A,B, Sensors are separately replaceable. ommunications port for future field added advanced feature modules. Flush mounted to sheet metal rather than spud mounted to sensing well. / in. ( mm) B quick connect and AMP plug connections meet ANSI miswiring requirements. UL Limit ontrols approval for both U.S. and anada. Meets UL 998 Software Safety Standards. Diagnostic LED to assist in system troubleshooting. The L78F Electronic Aquastat ontroller is an immersion type hydronic controller that provides high limit protection and controls circulator, gas valve and optional vent damper equipment. The complete L78F system requires a sensor, immersion well and transformer, all of which must be ordered separately. See Table for sensor specifications. An external 0 Vac to Vac transformer is required to power the L78F. For total external transformer VA requirements, add the 0 VA requirement for the control, gas valve load requirement (connections B, B), zone valve connection requirement (see zone valve specifications), vent damper requirement and VA requirement for any other equipment. Total low voltage load must not exceed A. ontents General... Features... Specifications... Ordering Information... Installation... Adjustment... Operation... heckout... Troubleshooting... U.S. egistered Trademark opyright 00 Honeywell All ights eserved

2 L78F ELETONI AQUASTAT ONTOLLE SPEIFIATIONS IMPOTANT The specifications given in this publication do not include normal manufacturing tolerances. Therefore, this unit may not exactly match the listed specifications. Also, this product is tested and calibrated under closely controlled conditions, and some minor differences in performance can be expected if those conditions are changed. 7/ () / () -/8 () /8 () Standard Models Models: L78F Electronic Aquastat ontroller with quick connect terminals, with or without vent damper plug and communications port (for adding advanced feature modules). L78F Electronic Aquastat ontroller with AMP plug connections, with or without vent damper plug and communications port (for adding advanced feature modules). AMP connector on wiring board for transformer connection. /8 (0) (0) -/ (9) -/ () -/ (0) () M00 High Limit Setpoint ange: 0 F to 0 F ( to ). (Select models may be different.) Differential: Fixed 0 F ( ). (Select models may be different.) Operating Voltage ange: L-L Line Voltage Power: Nominal, 0 Vac. - V Transformer Output: Nominal, Vac. Minimum/Maximum Ambient Temperature: -0 F (-9 ) with.0a V load. 0 F ( ) with.0a V load. Operating elative Humidity: 0 to 9% H non-condensing. Electrical atings (0 Hz only): B-B:.0A at Vac. -: Full Load 7.A at 0 Vac; Locked otor,.a at 0 Vac. TE: Total Low Voltage load must not exceed.0a. ase Dimensions: See Fig.. Fig.. L78F dimensions in in. (mm). Mounting: Vestibule mount. Approvals: Underwriters Laboratories Inc. omponent ecognized: File No. MP. anadian Underwriters Laboratories Inc. omponent ecognized: File No. MP. ANSI Miswiring: / in. ( mm) B quick connect terminal and AMP plug connections meet ANSI Appliance Miswiring Standard. Material Safety Data Sheets (MSDS): For more information on heat-conductive compound, see form Accessories: 0708 Heat onductive ompound ( oz. can). For more information, see form 9-09, Heat onductive ompound. 7AA Sensor etaining lamp Sensor etaining Spring. Sensor: Sensor available separately. For leadwire lengths available, see Table. ODEING INFOMATION When purchasing replacement and modernization products from your TADELINE wholesaler or distributor, refer to the TADELINE atalog 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:. Your local Home and Building ontrol Sales Office (check white pages of your phone directory).. Home and Building ontrol ustomer elations Honeywell, 88 Douglas Drive North Minneapolis, Minnesota -8 In anada Honeywell Limited/Honeywell Limitée, Dynamic Drive, Scarborough, Ontario MV Z9. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, anada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A

3 L78F ELETONI AQUASTAT ONTOLLE Immersion Well: Available separately. ontact your distributor or Honeywell sales representative to order, or refer to Accessories for Immersion Wells, ompression Fittings, and Element Holders, form Transformer: Available separately with either quick connect terminals or AMP plug connections. ontact your distributor or Honeywell sales representative to order. Table. Sensor Specifications. Sensor Termination Lead Length Diameter apsule Length Mounting Material One / in. ( mm) and one / in. ( mm) quick connect terminal. in. (0 mm), 8 gauge wire in. (8 mm), 8 gauge wire in. (0 mm), 8 gauge wire in. (9 mm), 8 gauge wire in. (9 mm), 8 gauge wire. /8 in. (0 mm) -/ in. ( mm) ompression Thermal plastic INSTALLATION When Installing this Product. ead these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.. heck the ratings given in the instructions and on the product to make sure the product is suitable for your application.. Installer must be a trained, experienced service technician.. After installation is complete, check out product operation as provided in these instructions. WANING Fire or Explosion Hazard. an cause property damage, severe injury or death. Use this product only in systems with a pressure relief valve. WANING Electrical Shock Hazard. an cause electrical shock or equipment damage. Disconnect power supply before beginning wiring. Never apply a jumper across (or short) terminals B and B. This will burn out the transformer. Mounting WANING Fire or Explosion Hazard. an cause serious injury, death or property damage. Sensor must be fully inserted to bottom of well. IMPOTANT The L78F is not designed for spud mounting to the sensing well. Sensor and immersion well are not provided and must be purchased separately. Mounting screws must be obtained locally. See Table for sensor specifications. The sensor is adaptable to existing immersion wells with a shell I.D. of /8 in. (0 mm). To order an immersion well, contact your distributor or Honeywell sales representative, or refer to Accessories for Immersion Wells, ompression Fittings, and Element Holders, form In new and replacement applications, mount the Electronic Aquastat ontroller on the vestibule away from heated surfaces. Use four no. screws, obtained locally, to mount the control through the four mounting holes. Mount the immersion well, purchased separately, where boiler water of average temperature can circulate freely around it. To insert the immersion well into the boiler:. Turn off all power and drain the boiler.. If no tapping is provided, prepare properly sized and threaded tapping near the top of the boiler.. oat the well threads sparingly with pipe dope, install the well in the boiler tapping, and tighten securely.. efill the boiler and check for water leakage

4 L78F ELETONI AQUASTAT ONTOLLE IMPOTANT Sensor must be fully inserted to bottom of well. emove all heat conductive compound from the well prior to sensor insertion.. Insert the sensor into the well. Make sure the sensor fits securely against the bottom of the well. To secure sensor and leadwire with mounting clamp (see Fig..):. Loosen the draw nut and spread the jaws of the clamp.. Slide the jaws of the clamp over the mounting flange.. Adjust the sensor leadwire to fit through the groove in the mounting clamp. IMPOTANT Do not overtighten the draw nut or a system shut-down could occur.. Tighten the draw nut so that the clamp is firmly attached to the well and the leadwire is held securely in place.. Secure excess leadwire to prevent disconnection of sensor or removal from the well. Wiring WANING Electrical shock hazard. an cause serious injury, death or equipment damage. Disconnect power supply before beginning wiring. IMPOTANT An external transformer is required for operation. The user must size the transformer for the specific application. If L78F is used to power zone valves, total low voltage (V) load must not exceed A. Use a zoning panel such as the Honeywell 8889 when load exceeds these ratings. All wiring must comply with local electrical codes and ordinances. efer to the SPEIFIATIONS section when applying this control. For appropriate wiring diagrams, see Fig. through 0. MOUNTING FLANGE BOTTOM OF WELL For screw terminal connections:. Strip / in. of insulation from the wire end.. Insert the wire under the terminal screw and contact plate.. Using a standard, flat-headed screwdriver, tighten the screw until the wire is firmly in contact with the screw and contact plate.. Tighten the screw an additional one-half turn. M8 LAMP JAWS OF LAMP SENSO LEADWIE SENSO PLAE JAWS OF LAMP OVE MOUNTING FLANGE For quick connect terminal connections: onnect the quick connect to the appropriate terminal on the control. B and S are / in. ( mm) quick connect terminals; all other terminals are / in. ( mm). For AMP plug connections: onnect the AMP plugs to the receptacles on the control. An AMP plug connection is shown in Fig. 8. The L78F and appropriately sized external transformer can power up to three Honeywell V80 Zone Valves. Additional valves, in groups of three or less, require an additional transformer, or use Honeywell 8889 Zone Valve Panel. Follow the appropriate wiring diagrams when using zone valves. See Fig.,, 7, and 9. TIGHTEN SEW AND DAW NUT TO SEUE LAMP M8 Fig.. Secure sensor and leadwire with mounting clamp or spring (see Accessories). On systems requiring a vent damper, the Honeywell vent damper can be connected directly to some L78F Electronic Aquastat models (Fig. 9) or S80 Spark Ignition Modules (Fig.8). With the vent damper plugged into the Electronic Aquastat ontroller, a fuse in the Electronic Aquastat ontroller blows when the thermostat first closes. Once the fuse is blown, the Electronic Aquastat ontroller does not operate unless the vent damper is connected. With the vent damper plugged into the S80, a fuse in the ignition module blows when first powered. Once the fuse is blown, the ignition module does not operate unless the vent damper is connected

5 THEMOSTAT L78F ELETONI AQUASTAT ONTOLLE L L Fig.. External connections for L78F. ADJUSTMENT A manual adjustment potentiometer is used to set the high limit controller. At the maximum setpoint of 0 F ( ), the calibration tolerance is plus 0 F ( ) and minus F (8 ). (Meets ASME and UL Standards). (Select models available with other ranges.) TE: IULATO DISONNET SWITH L78F G LX B B L L LX POT TO ADVANED FEATUE LX LX POWE SUPPLY. POVIDE DISONNET MEANS AND OVELOAD POTETION AS EQUIED. GOUND MUST BE AN EATH GOUND ONNETION. B AND S AE / IN. QUIK ONNET TEMINALS. ALL OTHE TEMINALS AE / IN.,, Z, B, G AE ALL ONNETED INSIDE DEVIE. FO EXTENAL TANSFOME VA EQUIEMENTS, EFE TO APPLIATION SETION. IS A ONVENIENE TEMINAL FO V HOT ONNETION FO USE WITH IGNITION ONTOLS. TO BOILE SENSO TO THEMOSTAT O SWITH LOSUES FO ZONES V Setpoint ange: 0 F ( ) to 0 F ( ). Differential: Fixed at 0 F ( ). OPTIONAL VENT DAMPE PLUG W S S BUNE ONTOL V HOT TO VALVE O IGNITION ONTOL M797 OPEATION A system containing an L78F Electronic Aquastat does not require a separate high limit controller. The L78F can replace a Honeywell L080 High-Limit ontroller and an 8 Transformer. The L78F does not provide a low limit function. An external transformer, appropriately sized for the specific application; a sensor, and an immersion well are required for Aquastat operation. In the L78F system without an advanced feature module, the circulator is on any time there is a thermostat call for heat. The addition of an advanced feature module may alter operation. The burner is also on during a thermostat call for heat unless the boiler water temperature exceeds the high limit setting. The L78F Electronic Aquastat has three states of operation: normal, high-limit and reset: (The control moves back and forth between the normal and high-limit states, as needed. However, the control only enters the reset state when there is an abnormal condition such as an internal error or shorted sensor.). Normal: The control enters the normal state when the temperature of the boiler drops below the high limit setting minus 0 F (- ). The control exits the normal state and returns to the high limit state when the temperature of the boiler exceeds the high limit setting.. High limit: The control enters the high limit state when the temperature of the boiler exceeds the high limit setting. The control exits the high limit state and returns to the normal state when the temperature of the boiler drops to the high limit setting minus 0 F (- ).. eset: Detects an error condition such as an open sensor and shuts down all outputs. The control continues to function and automatically restarts if the error condition is corrected. High Limit The high-limit switch shuts off the burner (B, B output) when the boiler water temperature exceeds the high-limit setting. Because heating systems differ, the correct temperature setting for each system can vary. Follow the boiler manufacturer recommendations for the proper setting. Turn the HIGH-LIMIT dial on the control until the desired setting is directly below the indicator. Sequence of Operations The state of the burner and circulator outputs are dependent on the thermostat input mode (On/Off) and the current operation mode (High limit/normal/eset). See Table Sequence of Operations. TE: Table applies only to the operation of the Electronic Aquastat ontroller without an advanced feature module. Advanced feature modules provide additional functions such as boiler temperature display and outdoor reset of high limit. hanges in output states and operation modes caused by these additional functions are not included

6 THEMOSTAT L78F ELETONI AQUASTAT ONTOLLE Table. Sequence of Operation Thermostat Operation Mode Burner irculator Off Normal Off Off Off High Limit Off Off On Normal On On On High Limit Off On Either eset Off Off L L DISONNET SWITH LX LX OPTIONAL VENT DAMPE PLUG POWE SUPPLY. POVIDE DISONNET MEANS AND OVELOAD POTETION AS EQUIED. GOUND MUST BE AN EATH GOUND ONNETION. ADD JUMPE AS SHOWN. L78F G LX B B L L LX 7 FO EXTENAL TANSFOME VA EQUIEMENTS, EFE TO APPLIATION SETION. B AND S AE / INH. QUIK ONNET TEMINALS. ALL OTHE TEMINALS AE / INH.,, Z, B, G AE ALL ONNETED INSIDE DEVIE. BUNE ONTOL V HOT 7 IS A ONVENIENE TEMINAL FO V HOT ONNETION FO USE WITH IGNITION ONTOLS. TO VALVE O IGNITION ONTOL V80F ZONE V80F ZONE V80F ZONE POT W S S END SWITH TH-T TH T END SWITH TH-T TH T END SWITH TH-T TH T TO ADVANED FEATUE TO BOILE SENSO M7B V L (HOT) L Fig.. Wiring L78F with multizone valves

7 THEMOSTAT L78F ELETONI AQUASTAT ONTOLLE 8 ELAY 8 8 L78F TO ADDITIONAL 8A ELAYS FO OTHE ZONES 8A ELAY ZONE T T T T T T W LX PUMP PUMP PUMP LX DISONNET SWITH L L L78F L LX LX OPTIONAL VENT DAMPE PLUG G LX B B L LX LOW VOLTAGE GAS VALVE (V800) T TH THT B B T THT TH LOW VOLTAGE GAS VALVE (V800) IULATO ZONE V THEMOSTAT POT TO ADVANED FEATUE W S S V TO BOILE SENSO POWE SUPPLY. POVIDE DISONNET MEANS AND OVELOAD POTETION AS EQUIED. GOUND MUST BE AN EATH GOUND ONNETION. B AND S AE / INH QUIK ONNET TEMINALS. ALL OTHE TEMINALS AE / INH.,, Z, B, G AE ALL ONNETED INSIDE DEVIE. IULATO FO EXTENAL TANSFOME VA EQUIEMENTS, EFE TO APPLIATION SETION. L L G S S V TO BOILE SENSO L (HOT) L TO ADVANED FEATUE POWE SUPPLY. POVIDE DISONNET MEANS AND OVELOAD POTETION AS EQUIED. GOUND MUST BE AN EATH GOUND ONNETION. B AND S AE / INH QUIK ONNET TEMINALS. ALL OTHE TEMINALS AE / INH.,, Z, B, G AE ALL ONNETED INSIDE DEVIE. FO EXTENAL TANSFOME VA EQUIEMENTS, EFE TO APPLIATION SETION. IS A ONVENIENE TEMINAL FO V HOT ONNETION FO USE WITH IGNITION ONTOLS. Fig.. Wiring L78F in multizone system with 8 Switched irculator. M8B IS A ONVENIENE TEMINAL FO V HOT ONNETION FO USE WITH IGNITION ONTOLS. M77B Fig.. Wiring L78F in a gas-fired, forced hot water, tankless, zoned, pump system

8 THEMOSTAT THEMOSTAT L78F ELETONI AQUASTAT ONTOLLE L L IULATO DISONNET SWITH LX LX OPTIONAL VENT DAMPE PLUG L78F G LX B B L L LX BUNE ONTOL V HOT TO VALVE O IGNITION ONTOL POWE SUPPLY. POVIDE DISONNET MEANS AND OVELOAD POTETION AS EQUIED. GOUND MUST BE AN EATH GOUND ONNETION. FO EXTENAL TANSFOME VA EQUIEMENTS, EFE TO APPLIATION SETION. B AND S AE / INH. QUIK ONNET TEMINALS. ALL OTHE TEMINALS AE / INH.,, Z, B, G AE ALL ONNETED INSIDE DEVIE. IS A ONVENIENE TEMINAL FO V HOT ONNETION FO USE WITH IGNITION ONTOLS. POT TO ADVANED FEATUE W S S TO BOILE SENSO T87 ZONE T87 ZONE T87 ZONE 0V L (HOT) L T87 ZONE M797 Fig. 7. Typical three-wire zone valve hookup diagram. L L DISONNET SWITH LX LX OPTIONAL VENT DAMPE PLUG L78F G LX B B L L LX S80 MV MV/PV PV GND V VENT DAMPE (BUNE) GND V TH-W PLUG SPAK V80 PV PV MV MV IULATO POWE SUPPLY. POVIDE DISONNET MEANS AND OVELOAD POTETION AS EQUIED. POT W S S GOUND MUST BE AN EATH GOUND ONNETION. B AND S AE / INH QUIK ONNET TEMINALS. ALL OTHE TEMINALS AE / INH., Z, B, G AE ALL ONNETED INSIDE DEVIE. TO ADVANED FEATUE V TO BOILE SENSO THEMOSTAT FO EXTENAL TANSFOME VA EQUIEMENTS, EFE TO APPLIATION SETION. IS A ONVENIENE TEMINAL FO V HOT ONNETION FO USE WITH IGNITION ONTOLS. Fig. 8. Wiring L78F with S80 Intermittent Pilot Ignition Module with automatic vent damper plug and Honeywell D89/D89/M89/M89 Vent Damper. M78B

9 THEMOSTAT L78F ELETONI AQUASTAT ONTOLLE S800 V GND V L L DISONNET SWITH IULATO LX LX 8 D89/D89/M89/M89 ABLE L78F G L L 7 LX LX 7 7 B B FUSE HIGH LIMIT ONTATS POLAIZED -PONG MALE MOLEX PLUG AND -PONG FEMALE MATING PLUG ON ABLE -PONG FEMALE MOLEX EEPTALE IN L78F AND -PONG MALE MOLEX PLUG ON ABLE 7 POT 7 W S S POWE SUPPLY. POVIDE DISONNET MEANS AND OVELOAD POTETION AS EQUIED. EMOVE PLUG-IN THAT JUMPES PINS AND WHEN USING VENT DAMPE. AFTE VENT DAMPE IS PLUGGED INTO L78F, FUSE BLOWS WHEN THEMOSTAT FIST LOSES. AFTE FUSE BLOWS, L78F OPEATES ONLY WHEN VENT DAMPE IS ONNETED. TO ADVANED FEATUE TO BOILE SENSO SEE VENT DAMPE PODUT SPEIFIATIONS FO INTENAL SHEMATIS. V THEMOSTAT S IS A / INH QUIK ONNET TEMINAL; S IS / INH. THIS DEVIE HAS AMP PLUGS. 7,, Z, B, G AE ALL ONNETED INSIDE DEVIE. M80B 8 FO EXTENAL TANSFOME VA EQUIEMENTS, EFE TO APPLIATION SETION. Fig. 9. Wiring L78F with AMP plug connections and internal plug directly to D89/D89/M89/M89 Vent Damper in hydronic intermittent pilot system

10 L78F ELETONI AQUASTAT ONTOLLE L78F W ZONE ZONE ZONE LX LX TO VALVE O IGNITION ONTOL B B 88 N.O. N... N.O. N N.O. N... N.O. N N.O. N... N.O. N... 7 W B W B W B L L (HOT) IULATO ZONE IULATO ZONE IULATO ZONE L L G S S TO BOILE SENSO POWE SUPPLY. POVIDE DISONNET MEANS AND OVELOAD POTETION AS EQUIED. GOUND MUST BE AN EATH GOUND ONNETION. FO EXTENAL TANSFOME VA EQUIEMENTS, EFE TO APPLIATION SETION. V TO ADVANED FEATUE 88 IS POVIDED WITH NE LASS ENLOSUE. B AND S AE / INH QUIK ONNET TEMINALS. ALL OTHE TEMINALS AE / INH.,, Z, B, G AE ALL ONNETED INSIDE DEVIE. 7 IS A ONVENIENE TEMINAL FO V HOT ONNETION FO USE WITH IGNITION ONTOLS. M8B Fig. 0. Multizone system with 88 Switched irculator

11 THEMOSTAT L78F ELETONI AQUASTAT ONTOLLE LX LX L L DISONNET SWITH OPTIONAL VENT DAMPE PLUG IULATO L78F G LX B B L L LX PILOT BUNE GOUND (THOUGH PILOT TUBING) SV90/SV90; SV90/SV90 VOLT MON VOLT HOT VOLT THEMOSTAT O PESSUE SWITH EFT OUTPUT POT POWE SUPPLY. POVIDE DISONNET MEANS AND OVELOAD POTETION AS EQUIED. GOUND MUST BE AN EATH GOUND ONNETION. W S S B AND S AE / INH QUIK ONNET TEMINALS. ALL OTHE TEMINALS AE / INH. TO ADVANED FEATUE TO BOILE SENSO TO THEMOSTAT O SWITH LOSUES FO ZONES V, Z, B, G AE ALL ONNETED INSIDE DEVIE. FO EXTENAL TANSFOME VA EQUIEMENTS, EFE TO APPLIATION SETION. IS A ONVENIENE TEMINAL FO V HOT ONNETION FO USE WITH IGNITION ONTOLS. M79B Fig.. Wiring L78F with SV90/SV90/SV90/SV90 SmartValve System ontrols. HEKOUT heck to make certain that the Electronic Aquastat ontroller has been properly installed and adjusted. Put the system into operation and observe the action of the device through several cycles to make certain that it provides proper control of the system as described in the Operation section. TOUBLESHOOTING When attempting to diagnose system performance, reference to the diagnostic LED can help to identify specific areas not working properly. Table shows the LED codes. Fig. provides a troubleshooting chart. Table. LED odes. Number of Blinks Indication onstant On Power on normal operation. Sensor error check connection and/or replace sensor. or L78F failures replace control 8-089

12 L78F ELETONI AQUASTAT ONTOLLE STAT BOILE IS OLD. BOILE IS T EAHING POPE TEMPEATUE O WILL T TUN ON. HEK: L78F DIAGSTI LED ON? HEK FO 0 VA AT LX, LX. HEK FO VA AT,. TUN POWE ON; HEK ALL WIING ONNETIONS; EPLAE TANSFOME AS APPOPIATE. SET OOM THEMOSTAT AT 0 DEGEES ABOVE OOM TEMPEATUE. SET BOILE 0 DEGEES (O MOE) ABOVE UENT WATE TEMPEATUE. BOILE TUNS ON? SHOT TEMINALS W- (T-TW) ON L78F. BOILE STATS? THEMOSTAT O THEMOSTAT WIING POBLEM. HEK SYSTEM PE INSTUTIONS POVIDED WITH THEMOSTAT. HEK: L78F DIAGSTI LED FLASHING? TWO BLINKS: HEK SENSO ONNETIONS. IF GOOD, EPLAE SENSO. THEE O FOU BLINKS: INTENAL EO, EPLAE L78F. HEK: L78F IN ESET MODE (WAIT FIVE MINUTES FO ONTOL TO ESET). VENT DAMPE OPEN? HEK FO V AT B, B. HEK VENT DAMPE ABLE AND ONNETIONS. EPLAE VENT DAMPE ABLE O DAMPE AS APPOPIATE. L78F IS OKAY. HEK IGNITION AND GAS VALVE SYSTEM AS DESIBED IN LITEATUE POVIDED WITH THOSE PODUTS. HEK: IULATO PUMP UNNING? 0 VA AT,? HEK: OOM THEMOSTAT STILL SET 0 DEGEES ABOVE UENT OOM TEMPEATUE? BOILE SHUTS OFF AT HIGH LIMIT SETTING? L78F IS OKAY. HEK OTHE SYSTEM PONENTS: IULATO. ZONE VALVES. EPLAE L78F. ESET THEMOSTAT AND EPEAT VOLTAGE HEK. BOILE SHUTS OFF ABOVE HIGH LIMIT SETTING? (BELOW HIGH LIMIT) HEK: TIADIATO AUAY. SENSO FULLY INSETED INTO WELL. THEMO WELL IN GOOD ONDITION. THEMO WELL LOATED PE BOILE OEM INSTUTIONS. HEK: L78F DIAGSTI LED FLASHING? TWO BLINKS: EPLAE SENSO. THEE O FOU BLINKS: EPLAE L78F. HEK: TIADIATO AUAY. THEMO WELL LOATED PE BOILE OEM INSTUTIONS. M009 Fig.. L78F troubleshooting flowchart. Home and Building ontrol Home and Building ontrol Honeywell International Honeywell Europe S.A. Honeywell Latin American Honeywell Honeywell Limited-Honeywell Limitée Home and Building ontrol Avenue du Bourget egion 98 Douglas Drive North Dynamic Drive Honeywell Building 0 Brussels 80 Sawgrass orporate Parkway Golden Valley, MN Scarborough, Ontario 7 hangi Business Park entral Belgium Suite 00 MV Z9 Singapore 807 Sunrise FL G.. ev. 0-0 Printed in U.S.A. on recycled paper containing at least 0% post-consumer paper fibers.