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Whirlpool EDP/EDN User's Manual

1. RESET SWITCH LA alg BLACK d WHITE PRIMARY TRANSFORMER BLUE SECONDARY YELLOW e 8 F2 Fuse F1 Puse GREEN YELLOW aja w z w wf S E a 5 2 i 8 E BLUE WHITE RF ae c sq BS 2 8 FE BLUE WHITES Gurspecre ele WHITE RED FIELD WIRING BOX Connect to power switch DRE REDBLACK SAFETY FLAMEROD IGNITOR E gu 8 GAS VALVE zu B THERMISTOR SUPPLY THERMISTOR ala RETURN ORANGE 8 ORANGE BLOWER ae PUMP BLACK BLUE 40 426A 4 Caution ATTENTION Label all wires prior to disconnection when servicing Au moment de l entretien des commandes controls Wiring errors can cause improper and tiquetez tous les fils avant de les d brancher Les dangerous operation erreurs de c blage peuvent nuire au bon fonctionnement et tre dangereuses Verify proper operation after operation servicing S assurer que l apperiel fonctionne a
2. 20 sj EE 20 7H Transfer Tank only 20 71 Thermostatic Union EDP EDN only 20 7J Cleaning the Boiler Coil 20 SECTION 8 Servicing 8A Sequence of Operation 21 8B Trouble Shooting Fault Codes 22 8B 1 Fault Code Identification 22 8B 2 Fault Correction 22 8B 3 Resolving Lockouts 22 TOGS 3 deir er reete emet 23 SECTION 9 Gas Valve Calibration 9A Gas Valve Calibration 31 SECTION 10 Symptom Evaluations 10A 10B 10C 10D 10E Delayed Ignition 31 Short Cycling sess 32 Noisy Operation ere tpe 32 Insufficient Hot Water only 32 High Gas Consumption 33 SECTION 11 Parts Identification 34 Endurance Page 3 SECTION 1 General Information 1A Introduction EBP This appliance is a low pressure direct vent hot water boiler that provides priority domestic hot water on demand as well as hydronic space heating system The unit has a twenty gallon tank which holds boiler water and is not domestic water storage The boiler water is kept hot at all times to provide immediate response to call for heat or
3. Figure 12 Domestic Water Piping Figure 13 Domestic Water Piping With Storage Tank Page 10 LAARS HEATING SYSTEMS View From Back Mixing Valve To Fixtures Cold P Return From Fixtures Flow Restrictor Aquastat Make On Temp Fall Figure 14 EBP Domestic Water Piping with Recirculating Loop AA WARNING Failure to install a hot water tempering mixing valve 12 creates a scalding hazard with potential for serious bodily injury Some brands of tempering mixing valves are not designed as anti scald valves Where domestic water is supplying multiple apartments or large whirlpool tubs additional storage tank may be connected as shown in Figure 13 The bronze circulator shown must be connected to tank aquastat and must not run continuously If the circulator is wired to run continuously unit s domestic water flow switch will keep the unit in domestic water priority and no water will be allowed to be sent to the heating system SECTION 4 Hydronic Heat Piping 4A Hydronic Piping The appliance incorporates its own circulating pump and bypass loop and is capable of providing flow through heating zones in addition to what it needs for itself Model size 110 is capable of providing flow for two heating zones up to 67 feet of baseboard each and model 175 is capable of providing flow for four heating zones up to 67 feet of
4. Endurance Page 27 Power Up Test OK Display Shows Off Check Power Up Fault Tree Display Shows Off Faulty Main PCB Press On Off Press Disp_ Mode For 1 Sec Then Release Display Shows NO bFt Flow Temperature YES Press Disp_Mode For 1 Sec Then Release EBP Only Display Shows tnt Tank Temperature YES Press Disp_Mode Fauly Main PCB For 1 Sec Then Release Display Shows NO rtt Return Temperature YES i rea BOILER TEMPERATURE Then Release FAU LT TREE Display Shows NO amp Flow Temperature YES After 20 Seconds Ensure Display End Power Up Shows Off Page 28 LAARS HEATING SYSTEMS 2 poor flame sensor signal 3 inadequate gas supply 4 ignitor failure 5 blocked or contaminated air source 1 Poor Combustion Poor combustion should be suspected if there is a strong flue gas odor The odor may result from either an improper gas air ration high or low CO or contamination of the combustion air supply If an improper gas air ratio is suspected refer to gas valve calibration offset adjustment on page 25 If contamination of the air source is suspected refer to 5 below 2 Poor flame sensor signal The boiler control board will lockout if the flame sensor is grounded or if the flame signal it receives is less than 1 LA dc To check for a grounded sensor re
5. 4 2C Locating the Vent on an Outside Wall 4 2D Stainless Steel Single Pipe Horizontal and Vertical 7 2E Air Source for Combustion when not direct vented 7 2F Connecting Special Gas Vent to the 8 2G Securing Special Gas Vent 8 SECTION 3 Gas Piping 3A Gas PIPING 8 3B Domestic Water Piping only 9 SECTION 4 Hydronic Heat Piping 4A Hydronic Piping 10 4B Using in a Combined Hot Water Heating and Chilled Water Cooling System 12 4C Water Quality and Treatment 13 SECTION 5 Electrical Connections 5A Electrical Connections 13 SECTION 6 Boiler Start Up 6A Common Vent 17 6B Filling the System 18 6C Firing Burner 18 6D Mode and On Off Buttons Operation 19 SECTION 7 Maintenance and Component Description 7 Unit PUND zero tr dte rent 19 7B Gas Valve 19 7 Safety Limit Switch 19 7D Operating Control Printed Circuit Board tin 19 YE Igniter Flame Sensor Assembly 20 7F
6. 0008 8 THERMOSTATIC UNION EDN NOT SHOWN 47 026 TRANSFORMER NOT SHOWN 2400 562 4 SENS K CA 7 NU l Lil Lh 1 IN OO O Page 35 Endurance 8 5 SOS Li eff FOr it FE 2 iin OQ Of 8 Model EBP PENES Hee 02 2 X I H o j ras Hus au DA Y Q Boiler Drain Fax 781 334 2541 orti As an Energy Star Partner Laars has determined that this product meets the Energy Star amp guidelines for energy efficiency 150 9002 1994 REGISTERED COMPANY CERT No 97 1073
7. 1 0 to 3 2 kPa To remove the gas valve shut off 120 volt power and the gas shutoff valve remove the 4 screws on the upper and lower flanges and disconnect the wires from the gas valve the valve may now be removed After the valve has been removed replace with a new valve in the reverse order in which the old valve was removed Turn on gas shutoff valve and 120 volt power and check boiler operation and gas tightness of gas valve connections 7C Safety Limit Switch The Safety Limit Switch is an automatic reset switch with a fixed set point of 230 F 110 C To replace the switch shut off the 120 volt power Disconnect the 2 wires from the quick connects at the switch and remove the switch To replace perform the same operations in reverse Turn on disconnect switch and check boiler 7D Boiler Control Printed Circuit Board PCB The Integrated Boiler Control Module controls the ignition process the combustion process the temperature of the boiler flow and return and the transfer tank temperature and provides both domestic hot water and space heating on demand To do this it takes inputs from three temperature sensors a domestic hot water flow switch an overheat thermostat safety limit and an external space heating switch such as a room thermostat zone valve end switches or circulator relay contacts It then controls the pump blower ignitor and gas valve sequencing It constantly displays the boiler outlet tempe
8. 2400 346 5 0x 2 4 i 3 0x 2 4 ADJUSTABLE ADJUSTABLE 2400 336 2400 342 3 0x 2 4 ADJUSTALE W 3 FLUE ADAPTER 2400 350 SIDE OF BOILER Figure 6 Part number 2400 360 provides the required venting materials for concentric through the roof vents It allows for a vertical vent straight off the top of the unit from 2 to 7 feet 0 6 to 2 1m Endurance Page 7 5 3 4 DIA 2D Stainless Steel Single Pipe Horizontal and Vertical Vents Category IV Stainless steel special gas Vent listed to U L Standard 1738 and U L C Standard 636 may be used Figure 7 For Appliances Certified as Direct Vent fy 18 INCHES OR LESS y Figure 8 Typical vent installation with 18 or less overhead clearance to outside Figure 9 Multiple Concentric Vent Clearances When appliances are used the concentric vent terminals must be at least 12 apart edge to edge see Figure term Do not locate the vent terminal where blockage by snow is a possibility or where flue products could strike against building materials and cause degradation If the vent terminal location chosen is less than 18 below an overhang the 3 vent pipe must extend to the outside edge of the overhang see Figure 6 Minimum clearance from combustibles vent 3 76mm Max flue gas temp 325 F 163 C Max vent pressure 1 5 WC
9. d Caution ATTENTION Label all wires prior to disconnection when servicing Au moment de l entretien des commandes controls Wiring errors can cause improper and tiquetez tous les fils avant de les d brancher Les dangerous operation erreurs de c blage peuvent nuire au bon fonctionnement et tre dangereuses Verify proper operation after operation servicing S assurer que l apperiel fonctionne ad quatement une fois l entretien termin Figure 32 EBP Wiring Diagram Endurance Page 31 observe the offset pressure at startup and after 20 seconds The pressure will be 2 in w c at startup during prepurge and should become less negative 0 1 in w c when the gas valve opens and gas flow starts If the pressure remains at 2 in w c throughout the cycle replace the gas valve 4 Ignitor failure If the boiler goes through a normal start cycle but combustion does not occur ignitor failure should be suspected Check the ignitor by unplugging the ignitor plug and measuring the ignitor resistance It should be 50 100 ohms If the resistance is not 50 100 ohms Q replace the ignitor If the resistance is correct reset the boiler and check for 120 VAC at the ignitor plug during the start cycle If there is no voltage replace the PCB or faulty ignitor wires 5 Blocked or contaminated air source Before proceeding ensure that the vent terminal Direct Vent installations or the air inlet Categor
10. domestic water Domestic water is heated by the boiler water through a stainless steel plate heat exchanger EDP EDN This appliance is a low pressure direct vent cold start hot water boiler that provides heat for hydronic space heating Both appliances incorporate a circulating pump and a bypass loop and provide circulation for the heating system and adequate flow for its own needs It may be necessary to install a system circulator to achieve the required flow rate through the system Both appliances feature a forced draft premixed combustion system All air for combustion is supplied with the gas to the burner flame holder Both the 18 intake air and the gas are metered through separate orifices before entering the combustion air blower The blower forces the air fuel mixture through the flame holder and into the combustion chamber The mixture is ignited from the hot surface ignitor and burns Hot gases are forced out between the passes of the heat exchanger into the flue collector Flue gases are discharged into the outside atmosphere through the vent terminal The appliance can operate with a concentric vent system that will provide outside air for combustion Other venting arrangements can be provided for the appliance to include an alternative 50 equivalent feet maximum horizontal or condensate trapped vertical vent 1B Codes and Standards The Endurance may be a direct vent or Category IV Boiler All ins
11. top of the control panel The ignition sequence will start again and the burner will start The appliance will return to its previous mode of operation 6D Mode and On Off Buttons Operation The on off button it is used to switch the appliance from standby ON to standby OFF and vice versa It is NOT an isolation switch The mode button accesses all other functions as described in their particular sections of this manual SECTION 7 Maintenance and Component Description 7A Unit Pump The unit pump operates whenever there is a call for heat or hot water Itis a wetted rotor type pump and should always be filled with water when it is operating so that it will cool properly If a pump change is required for any reason valve off the boiler and drain approximately 1 or 2 gallons approx 4 8L of water from it Turn off the main disconnect switch and unplug the pump wires remove the pump motor The pump housing need not be removed The replacement pump motor should be installed in the reverse order from which the old pump motor was removed After filling the system be sure the combustion chamber coil vents through the air vent located on top of the boiler chamber inlet manifold extension 7B Gas Valve The gas valve is a 24VDC solenoid operated negative pressure regulated ratio valve The outlet pressure may be adjusted as described in the service section It is designed to operate with supply pressures of 4 13 inches w c
12. 10B Short Cycling Possible causes Reduced system flow EDP Thermostatic union EDP or anti condensing valve not opening EBP c T T wires cross connected jumped improper installation EBP or EDP EDN d Leakage of flue products into the combustion air stream Direct Vent Installations only see Section 8B 3 Resolving Lockouts LO item 5 10C Noisy Operation There are two principal sources of noisy operation a Combustion high pitched noise whistle or hoot b Boiling kettling lower frequency noise which varies with temperature moan Many times it is difficult to determine the source of the noise or if it is combustion related or boiling related Combustion noises always have the same frequency however their volume may change from the time that the burner first fires to the time that it shuts off A boiling noise is identified by rapidly raising or lowering the system water pressure while the noise is present A change in the pitch or intensity of the noise indicates a boiling problem Combustion noise occurs at any boiler discharge temperature and is heard the loudest at the flue outlet especially on units that are sidewall vented There are two basic causes for the noise rich mixture high CO or low O2 or cross contamination The mixture is determined by measuring the percent or CO in the flue products O2 readings lower than 4 or CO readings higher than 94 natural gas
13. 159 per 3000 BTU hr 7 cm kw of the total input rating of all equipment located in the enclosure and b Notless than the sum of the areas of all vent connectors in the confined space 2F Connecting Special Gas Vent to the Appliance Part number 2400 372 is used with a vent terminal p n 2400 277 to secure the 3 inch special gas vent to the flue outlet of the appliance Heat Fab pipe or fittings p n 2400 350 or 2400 352 or the male end of Z Vent pipe Z Vent 02 SVEPXX030 may be installed over the flue outlet of the Appliance see Figure 10 2G Securing Special Gas Vent Attach p n 2400 277 with sheet metal screws to the 5 collar on the appliance with a short piece of 5 pipe or to the end of the 5 combustion air duct Attach p n 2400 372 bracket and tighten clamp Form the tabs on the bracket onto the special gas vent pipe and secure the tabs with the 3 clamp After the clamp has been tightened fold the end of the tabs down over the clamp see Figure 10 DO NOT use screws in any portion of the 3 special gas vent When providing combustion air from another location the connection of the 5 duct to the appliance must be secured with sheet metal screws Each 5 joint in the 5 duct must be secured with sheet metal screws In this type of installation p n 2400 372 must be used to secure the special gas vent at the point where it exits the duct The combustion air supply should be protected from debris enter
14. 34 baseboard each EDP EDN boilers installed in radiant in floor systems and other low mass boilers should be provided with a buffer blender tank to assure a controlled supply temperature and to prevent short cycling In radiant systems utilizing 3 way tempering valves a bypass pipe must be installed between supply and return piping ONLY Connect system supply to 114 supply connection marked SUPPLY 2 EDP EDN ONLY Connect 114 thermostatic union to system supply connection in direction designated with union 3 Pipe the discharge of the relief valve full size to a drain or in a manner to prevent injury in the event of pressure relief 4 Install an air purger in flow supply line as shown in Figures 15 16 or 17 Install automatic float type air vent on air scoops Install a diaphragm expansion tank in boiler outlet piping To ensure sufficient expansion volume for the hydronic system water due to heat up and cool down during normal operation a 30 or larger expansion tank must be used on EBP combo units NOTE Never install expansion tank and auto fill valve on return 7 If necessary install a properly sized circulator with optional isolation valves in supply beyond expansion tank d Caution All hot water pipes must be installed with a minimum 1 25mm clearance from combustible materials SA 8 Connect boiler feed water supply with shut off valve to inlet connection of aut
15. COLD WATER IN LEGEND T1 BOILER OUTLET THERMISTER T2 BOILER RETURN THERMISTER T3 STORAGE TANK THERMISTER T4 MECHANICAL SAFETY LIMIT SWITCH INTERNAL TO ENDURANCE VENTURI SPACE TEE HEATING SUPPLY o F4 BOILER PUMP SINGLE SPACE HEATING RETURN Figure 28 EBP Flow Schematic Page 22 LAARS HEATING SYSTEMS 4 10 seconds after establishing combustion and proof of flame via the flame rod signal to ground the ignitor will be de energized and the burner will modulate to high fire for maximum output 5 MC should indicate a rapid rise in temperature to 150 F 1 2 min duration During this period the thermostatic union at the flow outlet is closed and the boiler is operating in the internal recirculation mode Service note If the temperature rise is not rapid the union thermostat may be defective and must be replaced 6 At 150 the thermostat will allow increased flow to the system and a gradual rise in temperature will be indicated until the temperature approaches the setpoint temperature of 180 F The firing rate will start to modulate downward until its cutoff limit is reached or the call for heat is satisfied The EBP modulating combination boiler will start from any of three input signals a T T closure for space heating b A demand for domestic hot water signaled by water flow activation of the water flow switch c A call for heat fr
16. QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ Do not try to light any appliance e Ne pas tenter d allumer d appareils Do not touch any electrical switch do not e Ne touchez aucun interrupteur Ne pas vous use any phone in your building servir des t l phones dansle b timent o vous Immediately call your gas supplier from a vous trouvez Appelez imm diatement votre fournisseur de gaz depuis un voisin Suivez les instructions du fournisseur Si vous ne pouvez rejoindre le fournisseur de gaz appelez le sservice des incendies Installation and service must be performed by a L installation et l entretien doivent tre assur s par qualified installer service agency or gas un installateur ou un service d entretien qualifi ou supplier par le fournisseur de gaz nearby phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department P O Box 310 Lynnfield MA 01940 Phone 781 961 1660 Fax 781 334 2541 30 418D LAARS HEATING SYSTEMS TABLE OF CONTENTS SECTION 1 General Information 1A IntroduCtion sienne 3 1B Codes and Standards 3 1C Unpacking the Appliance 4 1D Locating the 4 1E sis 4 SECTION 2 Venting Options 2A Direct Venti its cocer et n rte eR ERR 4 2B Installing Direct Vent Kits
17. Reset Button Endurance Page 25 Display Should ig al SPACE HEATING FAULT TREE NOTE ACV Anticondensing Valve MFS Water Flow Switch PCB Main Control Board Display Should Show On Operate Room Thermostat Bad Thermostat Connections Faulty Thermostat Bad Internal Pump Check for 110V at Pump Connections Display Shows amp Flow Temperature Check Power Up Fault Trees YES Check Power Up YES Check Ignition Fault Tree Boiler Flame On YE S Continue for Model EBP Only YES Bad ACV Connections Bad ACV Faulty Main PCB Is Red Light On Is WFS Closed Tank Charge Light YES YES Wait for Tank to Come Unit is in DHW Up to Temperature Priority Mode and Red Light to Wait for DHW Call Turn Off to Finish Page 26 LAARS HEATING SYSTEMS DOMESTIC HOT WATER FAULT TREE EBP ONLY Display Shows On YES Turn On Hot Water Faucet Display Shows Flow Temperature YES Internal Pump On YES YES Boiler Firing YES Tank is Providing Hot Water Display Shows bFt Flow Temperature Is Red Tank Charge Light On WFS has Continuity Interal ACV Closed NOTE ACV Anticondensing Valve WFS Water Flow Switch PCB Main Control Board Check Power Up Fault Tree Faulty Main PCB Bad WFS Connections Faulty WFS Faulty Main PCB
18. components have been pre wired No attempt should be made to connect electric wires to any other location except the wiring box as described below 1 Main power Connect a fused 120 volt supply ENDURANCE FIELD WIRING BOX CIRCULATOR T STAT T ROOM T STAT 15 amp to the main power switch see Figure 20 hot leg is connected directly to g gt N switch Neutral leg to white wire Ground wire can be connected to the grounding screw in the box or on the switch Room Thermostat s Figure 21 Single Zone with Added Circulator s and ZONE THERMOSTATS CIRCULATOR 120 VAC CIRCULATOR On TO 120 VAC LINE m Prd GROUND _TSTAT ENDURANCE FIELD WIRING BOX TRANSFORMER 120 Figure 22 Multiple Zones Utilizing Four Wire Zone Valves with Dry End Switches Page 14 LAARS HEATING SYSTEMS 4 Multi zone Multi relay circulator Installations NOTE On zone valve systems such as Taco Multiple circulators must not exceed 5 amps total Automag and others which do not have isolated dry when connected to blue wire see Figure 24 contact end switches a single pole isolating relay must be utilized see Figure 23 ZONE THERMOSTATS TRANSFORMER Li Li E cs Le L 3j 3 CIRCULATOR 120 VAC 3 3 TACO ZONE VALVES RELAY 24VAC COIL Thie wirina i N O CONTACTS NOTE This wiri
19. designed for installation on combustible flooring in alcoves basements closets or utility rooms It must not be installed on carpeting IF INSTALLED IN A FINISHED AREA PROVISION SHOULD BE MADE FOR DRAINAGE OF ANY ACCIDENTAL SPILLAGE OR LEAKAGE The location for the unit should be chosen with regard to venting dimensions convenient access to piping and accessibility for service and cleaning The boiler shall be installed so that the gas ignition system components are protected from water dripping spraying rain etc during appliance operation or service circulator replacement control replacement etc 1E Clearances The dimension and criteria in Table 1 should be followed when choosing the location for the unit A B AGA CGA AGA CGA in mm in mm in mm Left Side 1 25 6 152 24 610 Right Side 1 25 12 305 24 610 Top Side 1 25 14 356 24 406 Back 1 25 9 229 12 305 Front 1 25 24 610 24 610 Vent Direct Vent 0 0 0 0 Vent Category IV 3 76 3 76 A Minimum clearance from combustible construction to meet AGA CGA requirements B Recommended clearance for accessibility and venting Table 1 Clearances SECTION 2 Venting Options 2A Direct Vent Kits When using a direct vent kit the appliance is a sealed combustion unit All of its air is drawn in from the outside through the 5 outer pipe Flue gases are vented through t
20. et autres d faillances qui pourraient pr senter des risques Dans la mesure du possible fermer toutes les portes et les fen tres du batiment et toutes les portes entre l espace o les appareils tojours raccord s et les autres espaces du batiment Mettre en marche les s cheuses tous les appareils non raccord s au syst me d vacuation commun et tous les ventilateurs d extraction comme les hottes de cuisin re et les ventilateurs des salles de bain S assurer que ces ventilateurs fonctionnent la vitesse maximale Ne pas faire fonctionner les ventilateurs d t Fermer les registres des chemin es Mettre l appareil inspect en marche Suivre les instructions d allumage R gler le thermostat de facon continue Faire fonctionner le br leur principal pendant 5 min ensuite d terminer si le coupe tirage d borde l ouverture de d charge Utiliser la flamme d une allumette ou d une chandelle ou la afum e d une cigarette d une cigare ou d une pipe Une fois qu il a t d termin selon la m thode indiqu e ci dessus que chaque appareil raccord au syst me d vacuation est mis l air libre de facon ad quate Remettre les portes et les fen res les ventilateurs les registres de chemin es et les appareils au gaz leur position originale Tout mauvais fonctionnement du syst me d vacuation commun devrait vacuation commun devrait tre corrig de facon que l installation soit conforme au National F
21. external 24 deposits and or corrosion products The formation of volt transformer of sufficient V A to power such deposits should be prevented wherever possible combined load of zone valves Consult zone Continual water make up is not permitted valve manufacturer s instructions Connect A suitable water treatment should be used to circulator 120 volt 5 amp maximum between prevent excessive scale deposits in the boiler and the blue wire and the white wire neutral see corrosion in the system Figure 22 SECTION 9 ENDURANCE Electrical Connections BLU WHT All electrical wiring must conform to local codes 120 VAC NEUT and or the National Electric Code or Canadian Electrical Code Part 1 i 120 VAC LINE The unit must be electrically grounded in GRN YEL GROUND accordance with the requirements of the authority WHT RED T STAT T having jurisdiction or in the absence of such RED T STAT T requirement with the National Electrical Code b y ANS NFPA No 70 latest edition or the CSA Standard C22 1 Canadian Electrical Code Part 1 Single pole switches including those of safety control and protective devices must not be wired in a Figure 20 Single Zone With Room Thermostat internal pump provides system flow grounded line All electrical connections are made in the field wiring box which is located on the top of the appli ance behind the right hand side of the control pod NOTE All internal electric
22. system antifreeze may be added to the hydronic system provided that the concentration does not exceed 35 and the antifreeze contains an anti foamant 4B Use in a Combined Hot Water Heating and Chilled Water Cooling System When the appliance is used in connection with a refrigeration system it must be installed so that the chilled medium is piped in parallel with the boiler with appropriate valves to prevent the chilled medium from entering it The boiler piping system of an appliance connected to heating coils located in air handling units where they may be exposed to refrigerated air circulation must be equipped with flow control valves or other automatic means to prevent gravity circulation of the boiler water during the cooling cycle Endurance Pag e 13 4C Water Quality and Treatment 2 Forsingle zone installations If external pump is Water quality control is steadily increasing in required e g because of large system pressure importance in view of the use of modern regulation drop connect room thermostat wires to the red technology and the modern boiler designs used in and white red wires Connect circulator 120 central heating systems volt 5 amps maximum between the blue wire The life of a central heating boiler can be and the white wire neutral see Figure 21 severely curtailed as a result of the formation of scale 3 Zone Valves and Thermostats Install
23. to provide air for combustion and ventilation However in buildings of unusually tight construction or when locating the appliance in a confined space additional air should be provided and the following guidelines must be followed 1 If the space is in a building of unusually tight construction air should be obtained from outdoors or from spaces which freely connect with outdoors 2 For boilers in confined rooms two permanent openings shall be provided one within 12 305mm of the ceiling and one within 12 305mm of the floor of each room Each opening shall be at least one square inch Page 8 LAARS HEATING SYSTEMS SHORT SECTION OF 5 PIPE Figure 10 Special Gas Vent Connection 3 GAS VENT CATEGORY IV CAP 1 652 LISTED Te INTAKE AIR SCREEN 5 TEE 4 MIN 2400 362 sie ENDURANCE WITH eee SEPARATE AIR SOURCE ALTERNATE VENTING Figure 11 Non Concentric Combustion Air Source 6 5 sq cm per 1 000 BTU hr 293 W boiler input but not be less than 100 square inches 645 2 sq cm These openings shall freely connect with areas having adequate infiltration from outside 3 When all air is provided from outdoors the confined space shall be provided with one opening within 12 of the ceiling This opening shall connect directly or by ducts with outdoors or spaces crawl or attic that freely connect with the outdoors and shall have a minimum free area of a
24. 0 4kPa Max equivalent ft of venting 3 76mm any combination of horizontal diameter diameter or vertical 50 equiv ft 15 2m Max equivalent ft of venting 100 equiv ft 30 5m any combination of horizontal or vertical 4 diameter 102mm dia Table 2 Appliance Venting Design Data to vent all models Vent pipe and fittings are manufactured to these standards by HeatFab Inc under the trade name of Saf T Vent and by Z Flex under the trade name of Z Vent Follow the Special Gas Vent manufacturer s instructions regarding design location and assembly of the vent system The appliance may be vented with any number of elbows or fittings provided that the maximum equivalent feet of venting is not exceeded Elbows 90 in the vent system shall be considered to be 5 equivalent feet 1 5m When vented with special gas vent the appliance must not be common vented with any other appliance For applications requiring vertical venting through a roof the above limitations apply Vertical vents greater than 7 2 1m in length must offset a condensate trap tee p n 2400 358 adjacent to the appliance Utilize vent cap p n 2400 370 to terminate vertical venting 2E Air Source For Combustion when not direct vented When using Category IV venting methods the appliance draws all combustion air through its top and from the adjacent space When locating the appliance in unconfined spaces in buildings infiltration may be adequate
25. 38 7 278 81 5 520 152 4 1050 307 7 20 6 1 92 27 190 55 7 350 102 6 730 213 9 30 9 1 73 21 4 152 44 5 285 83 5 590 172 9 40 12 2 63 18 5 130 38 1 245 71 8 500 146 5 50 15 2 115 33 7 215 63 440 128 9 75 22 9 93 27 2 175 51 3 360 105 5 100 30 5 79 23 1 150 44 305 89 4 150 45 7 64 18 8 120 35 2 250 73 3 Additional length to be added for each tee or bend ft m ft m ft m ft m 1 3 0 4 1 7 0 5 2 2 0 7 2 7 0 8 Table 3 1 Run gas supply line in accordance with all applicable codes 2 Locate and install manual shutoff valves in accordance with state and local requirements 3 Install drip leg ground joint union and drip cap to trap sediment and for test gauge access Support all piping with proper hangers All threaded joints should be coated with piping compound resistant to the action of liquefied petroleum gas 6 The boiler and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 2 psig 3 5 7 The boiler must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 2 psig 3 5kPa 8 The boiler and its gas connection must be leak tested before placing the boiler in operation 9 Purge all air from gas lines 3B Domestic Water Piping EBP only 1 Connect tempering m
26. 4 LAARS HEATING SYSTEMS Check Ign Sequence YES HSI Operates After 5 Seconds YES HSI Remains On For 10 Seconds YES GV Opens After HSI On For 10 Seconds Flame Ignites Y HSI amp GV Both Close After 5 Seconds YES ES IGN Complete GV Open HSI Off Fan Modules When Boiler Temp Is Over 180 F IGNITION FAULT TREE Bad Fan Connections Faulty Fan See Power Up Faulty Main PCB Fault Tree Blown F2 Fuse Bad HSI Connections Faulty HSI Faulty Main PCB Check Voltage to Igniter 120V Measure Ohms 50 100 Bad GV Connections Measure 24VAC to Valve Faulty GV Across Yellow amp Orange Wire on Faulty Main PCB PCB During Trial for Ignition 24VAC YES NO Check Gas Bau Su or oe GV Connection Bad PCB Bad Flame Detect Connections Cross OR Unit is Wired or Poor Flame Signal Contamination with Reversed Faulty Flame Detector check venting Polarity Black Poor Neutral Ground Relationship wire MUST have Faulty Main PCB 120 volts White wire MUST be Neutral 0 volt Measure Flame Signal Between s Yellow Wire to Flame Sensor Connection should be 1 microAmp or Higher Bad Fan Connections check continuity on each wire Faulty Fan Faulty Main PCB Anti NOTE Condensing Pump GV Gas Valve For Tank Charge CLOSED ON B dr DHW CLOSED ON HSI Ignitor Hydronic Heating OPEN ON LO RESET
27. 78 VENT TERMINAL EXTENSION OPT WALL FLANGES 5 0 MALE MALE OR 5 Ox 2 4 1ST ELBOW VENT ADJUSTABLE 2400 352 TERMINAL 2400 336 B 3 0 x24 ADJUSTABLE W 3 0 MALE MALE p VENT SCREEN ELBOW 5 0 x24 2400 344 2400 346 ADJUSTABLE 2400 336 3 0 x24 ADJUSTABLE W 3 FLUE ADAPTOR SIDE OF BOILER 2400 350 Figure 4 Part number 2400 326 for vent installations which require adjustable height and horizontal run This kit provides vertical and horizontal lengths of pipe from 2 to 3 0 6 to 1 1m To adapt 2400 278 vent terminal extension remove 3 screen section of telescoping piece Companion section will directly fit extension Page 6 LAARS HEATING SYSTEMS WALL FLANGES 5 MALE MALE 5 Ox 2 4 ELBOW VENT ADJUSTABLE 2400 347 TERMINAL 2400 336 2400 277 E 3 0 x 2 4 3 0 MALE MALE 3 0 x 8 5 ADJUSTABLE W ELBOW FLUE ADAPTER VENT SCREEN 2400 346 2400 352 2400 344 5 0 x8 CONNECTOR SIDE OF BOILER Figure 5 Part number 2400 328 provides all of the required venting materials for appliance installations that require adjustable horizontal run but a short vertical run It requires minimum above unit clearance of 13 330mm and provides for an adjustable horizontal run of 2 to 3 1 2 0 6 to 1 1m 7 0 PIPE 5 0 MALE MALE 1 992 ELBOW VENT TERMINAL 2400 347 D 2400 277 L 0 PIPE 1 882 3 0 MALE MALE ELBOW
28. For sales parts and service call 781 961 1660 Installation Operation and Maintenance Instructions Installation Operation and Maintenance Instructions for Endurance EBP Series Modulating Combination Boiler natural or propane gas EDP Series Modulating Hydronic Boiler natural or propane gas EDN Series Modulating Boiler non ferrous natural or propane gas FOR YOUR SAFETY This product must be installed and serviced by a professional service technician qualified in hot water boiler installation and maintenance Improper installation and or operation could create carbon monoxide gas in flue gases which could cause serious injury property damage or death Improper installation and or operation will void the warranty AAWARNING AVERTISSEMENT If the information in this manual is not Assurez vous de bien suivres les instructions donn es dans cette notice pour r duire au followed exactly a fire or explosion may It wd minimum le risque d incendie ou d explosion ou persona pour viter tout dommage mat riel toute injury or loss of life blessure ou la mort Ne pas entreposer ni utiliser d essence ni Do not Store or use gasoline TE d autres vapeurs ou liquides inflammables dans flammable vapors and liquids in the vicinity le voisinage de cet appareil ou de tout autre of this or any other appliance appareil WHAT TO DO IF YOU SMELL GAS
29. NK 1 1 i i ENDURANCE L_ DET HEATING ONLY BOILERS NOTE WIRE AQUASTAT OR CONTROL CONTACTS IN SERIES WITH PARALLEL WIRED ZONE CONTROL END SWITCHES OR PUMP RELAY CONTACTS ELECTRICAL CONNECTIONS CONTROL VOLTAGE T T Figure 17 Piping Model EDP EDN for Radiant Floor Page 12 LAARS HEATING SYSTEMS SYSTEM SUPPLY E AIR VENT 1 1 SYSTEM RETURN 1218 BYPASS PIPING FLOW CHECKS CIRCULATORS AIR PURGER DIAPHRAGM EXPANSION TANK STOP amp WASTE OR BALL VALVE BOILER FEED WATER AUTO FILL VALVE BALL VALVE 12 PSI MIN INCHES 12 18 INCHES TEE amp BOILER DRAIN FOR SYSTEM PURGING BACKFLOW PREVENTER call oo Figure 18 Hydronic Piping EBP EDP for Systems Zoned with Circulators Air Scoop Expansion Tank Circulator Thermostatic Union Zone Circulator C1 Zone Circulator Figure 19 Hydronic Piping EDP for Low Temp and or Multi Temp Systems or zone circulators in the same manner as any other residential boiler d Caution The EBP EDP appliance must not be direct connected to a heating system utilizing oxygen permeable tubing see warranty Provide a water to water heat exchanger between systems to prevent corrosion of tank or other components Non toxic heating
30. OP 2400 502 NEG REG PRESSURE 2400 548 2 PAN COMBUSTION CHAMBER BOTTOM 2400 504 22 SAFETY LIMIT 230 F 2400 550 3 INSULATION COIL COVER 2400 506 23 SENSOR TANK EBP ONLY 2400 552 4 INSULATION BOILER COIL 2400 508 24 SENSOR BOILER FLOW 2400 554 5 COIL BOILER EBP EDP EDN 110 ASSY 2400 510 25 SENSOR BOILER RETURN 2400 556 6 COIL BOILER EBP EDP EDN 175 ASSY 2400 512 26 THERMOSTATIC UNION EDP NOT SHOWN 2400 030 7 GASKET BURNER 2400 514 27 GAS SHUTOFF VALVE 2400 560 8 BURNER EBP EDP EDN 110 28 PUMP EBP EDP 110 2400 592 GASKETS INCLUDED 2400 516 29 PUMP EBP EDP 175 2400 386 9 BURNER EBP EDP EDN 175 30 GASKETS PUMP FLANGE 2400 566 GASKETS INCLUDED 2400 518 31 RESET SWITCH 2400 568 10 TRANSFER TANK 2400 520 32 HEAT EXCHANGER DOM HOT WATER 2400 570 11 BOILER DRAIN BEHIND PANEL EBP 2400 522 33 GASKETS DHW HEAT EXCHANGER 2400 572 12 BLOWER COMBUSTION AIR 34 BUTTON ON OFF PART OF 2400 546 GASKETS INCLUDED 2400 524 35 BUTTON TEMP MESSAGE 13 IGNITOR FLAME SENSOR PART OF 2400 546 GASKET INCLUDED 2400 526 36 GAUGE PRESSURE NOT SHOWN 2400 574 14 GASKET IGNITOR FLAME SENSOR 2400 528 37 PRESSURE RELIEF VALVE 15 COIN VENT 1 592 30 PSIG NOT SHOWN 2400 112 16 COMBUSTION AIR INLET 38 BOILER CONTROL BEHIND PANEL ADJUSTABLE KIT 2400 142 EDP EDN 2400 558 17 VALVE ANTI CONDENSING 39 PUMP EDN 110 2400 388 REPAIR KIT 2400 538 40 PUMP EDN 175 2400 388 Model EDP EDN
31. a mort Cet appareil n est pas dot d une veilleuse Il est quip d un dispositif d allumage qui allume automatiquement le br leur Ne tentez pas d allumer le br leur manuellement AVANT D UTILISER v rifiez s il n y a pas d odeur de gaz pr s de l appareil V rifiez s il n y a pas d odeur de gaz pr s du plancher car le gaz est plus lourd que l air et peut se d poser sur le plancher QUE FAIRE EN CAS D ODEUR DE GAZ N essayez pas d allumer n importe quelque appareil que ce soit Ne touchez pas un commutateur lectrique N utilisez pas le t l phone de votre r sidence Appelez imm diatement votre fournisseur de gaz en utilisant le t l phone de votre voisin Suivez les instructions de votre fournisseur de gaz Si vous ne pouvez joindre votre fournisseur de gaz appelez le service des incendies Fermez la soupape d arr t de gaz situ e au dessus de la commande de gaz multifonctions de sorte que la poign e soit perpendiculaire au tuyau de gaz Si vous ne pouvez tourner la poign e la main n essayez pas de la r parer Communiquez avec un technicien de service qualifi Le fait de forcer ou de tenter de r parer la poign e pourrait causer un incendie ou une explosion N utilisez pas cet appareil si l une des pi ces a t plong e sous l eau Communiquez imm diatement avec un technicien de service qualifi afin qu il inspecte l appareil et remplace toute pi ce du syst me de commande et toute
32. ace heating This is a good time to ensure that the system is fully discharged of all air and the water charge pressure is correct Should the water temperature remain below 45 F 7 C after 5 minutes the appliance will start the ignition sequence After three attempts to ignite the burner control will lock out and display LG see Figure 25 If the display remains at OFF press the on off button on the front panel and the reset button on top of the front panel The pump and the blower will start the display will then flash 4F boiler flow temperature for 1 second intervals and the actual temperature e g 127 in degrees F for 3 second intervals The appliance will attempt to ignite three times after which it will lock out and display 28 The fan and the pump will then stop Ensure that the system is fully discharged of all air and the water charge pressure is correct Turn the main electrical supply off EBP ONLY Manually reset the internal zone valve to its normal position manual level toward top of actuator System is now ready for operation Firing Burner Be sure that system has been filled properly and is leak tight Open gas shutoff valve Turn on main electrical switch If the temperature sensor detects a temperature below 39 F 4 C it will display The appliance will then be in the frost protection mode If the display remains at OFF press the on off button on the front of the con
33. and 10 8 LP will often cause combustion related noise The rich mixture could be caused by the mis calibration of the gas valve offset adjustment or by the gas orifice size To eliminate the noise first check the gas valve calibration If it is correct install a smaller gas orifice so that the O2 will rise above 42 or the CO will drop to 8 2 natural 9 2 LP The CO2 amp O readings may be influenced by cross contamination Suspect cross contamination if the noise returns when the front panel is replaced Boiling kettling may occur at boiler discharge temperatures from 170 F to 210 F The temperature at which it starts will vary from one installation to another The primary cause of the problem is poor heat transfer on the inside of the boiler coil This may be caused by foaming due to excessive concentration of antifreeze in the system or by scaling from the boiler water due to hardness of make up water Plumbing antifreezes should never be used in a boiler system Only boiler antifreezes with effective antifoamants are appropriate for the ENDURANCE boilers Note The concentration of appropriate antifreeze should be always be kept as low as possible to minimize its effect on heat transfer and efficiency The method for eliminating the boiling noise is the same regardless of the cause However if antifreeze in the system is suspected of being the cause the concentration lt 35 and type should be investig
34. ated Moisture Although it is not a primary cause of lockouts moisture in the combustion chamber may cause lockouts by weakening the flame signal to the boiler control It should be suspected if the boiler temperature does not rise above 160 F during long periods of operation This condition can be caused by a defective thermostat in the thermostatic union of EDN or EDP boilers or the omission of the thermostatic union at installation or failure of the anticondensing valve in the EBP combi boilers Moisture can also get into the combustion chamber through an incorrectly pitched or incorrectly installed flue pipe pitched back toward the boiler without a condensate trap The flue assembly of EBP EDN and EDP boilers installed as Direct Vent boilers should always pitch down from the boiler 10D Insufficient Hot Water EBP only Possible cause flow restrictor supplied with unit field installed b Water flow switch failure c Mixing valve setting or failure d Domestic hot water DHW heat exchanger contamination The most common cause for insufficient hot water complaints results from failure to install a flow restrictor The absence of a flow restrictor allows water to pass through the heat exchanger at a greater rate than the boiler output is capable of heating to the desired temperature Failure of the water flow switch to operate during a hot water draw prevents boiler water from Endurance Page 33 fl
35. ating alternately the fault number and the fault code F FL2 F FL8 F The fault number in fault code FL1 is the most recent fault 8B 1 Fault Code Identification The following eight fault codes may be observed F Error corrected control in auto reset time period 10 seconds F 0 No fault has occurred F 1 Error occurred reading fault logic of main control F 2 Over heat thermostat has operated open circuit F 3 Fan fault F 4 Flow temperature sensor faulty open or short circuited F 5 Tank temperature sensor faulty open or short circuited Combi unit only F 6 Return temperature sensor faulty open or short circuited 8B 2 Fault Correction see also Fault Trees in this Section F 1 Switch off boiler and restart If F 1 repeats replace PCB F 2 The overheat thermostat safety limit opens at 230 F Observe boiler operation if the boiler shuts off before the GFE indicates 225 F 107 C replace safety limit If the temperature rises rapidly and the safety limit operates the internal pump is not operating Refer to the wiring diagrams and check for voltage 120V across the terminals on the PCB marked PMP If there is no voltage and the PCB display does not indicate on or off replace PCB b If there is voltage the pump or wiring is defective F 3 Attempt to start the boiler Check combustion air blower operation If F 3 is indicated again replace blower F 4 Check for damaged wiring o
36. ays or car ports NOTE Should it be impossible to locate opening center line 16 419mm above grade use optional vent terminal extension p n 2400 278 Vent terminals must also be at least 3 0 9m above any forced air inlet located within 10 3 0m and at least 7 2 1m above grade when located adjacent to a public walkway and cannot terminate in a location where condensate or vapor may be a nuisance hazard or could be a detriment to other equipment Vent terminals must have a minimum clearance of 4 1 2m 6 1 8m in Canada horizontally from and in no case above or below electrical meters gas meters regulators and relief equipment unless a 4 1 2m horizontal distance is maintained Endurance Page 5 2400 278 VENT TERMINAL EXTENSION OPT WALL FLANGES 5 MALE MALE OR 5 0x 1 2 1ST ELBOW VENT ADJUSTABLE 2400 347 TERMINAL 1 899 2400 277 5 1 882 30 x 1 2 3 MALE MALE ADJUSTABLE W ELBOW VENT SCREEN 2400 346 3 0 x 8 5 1 905 FLUE ADAPTER 2400 352 5 0 x8 N CONNECTOR 1 890 SIDE OF BOILER Figure 3 Part number 2400 500 provides all of the required venting materials for appliance installations adjacent to an outside wall and for installation of wall mounted units Requires minimum above unit clearance of 13 330mm and provides maximum horizontal length of 24 from unit center line to outside wall face 2400 2
37. commande de gaz qui aurait t plong e sous l eau NOTICE D UTILISATION ARR TEZ Lisez l information de s curit ci dessus sur cette tiquette R glez le thermostat au r glage le plus bas Coupez l alimentation lectrique l appareil Cet appareil est dot d un dispositif d allumage qui allumera automatiquement le br leur Ne tentez pas d allumer le br leur manuellement Retirez le panneau d acc s aux commandes et le couvercle avant qui se trouve sur le dessus Commande de gaz multifonctions Valve de fermeture R glez le thermostat au r glage le plus bas Coupez toute alimentation lectrique l appareil si celui ci doit faire l objet d un entretien Retirez le panneau d acc s aux commandes et le couvercle avant qui se trouve sur le dessus Faites tourner la valve de fermeture du gaz dans le sens des aiguilles d une montre et mettez la off La poign e sera horizontale N employez pas de force Attendez cinq 5 minutes afin que le gaz se dissipe Si vous croyez sentir une odeur de gaz ARR TEZ Reportez vous aux instructions B ci dessous sur cette tiquette S il n y a pas d odeur de gaz passez la prochaine tape Faites tourner la valve de fermeture du gaz dans le sens contraire des aiguilles d une montre et mettez la 4 on La poign e sera verticale Replacez le couvercle avant et le panneau d acc s d
38. d quatement une fois l entretien termin Figure 31 EDP EDN Wiring Diagram LAARS HEATING SYSTEMS Page 30 RESET SWITCH BLACK f WHITE resend TRANSFORMER BLUE SECONDARY r YELLOW F2 Fuse 9 F1 Fuse i L GREEN YELLOW GROUND zm x BAE LINE smog sel Et s S gas 25 a Agee 8 pS ja 24 dir 9 2 ELEWE e ourse cic reco T En dp il s WHITE RED fo OnO RED_ TSTAT FIELD WIRING BOX Connect to power switch Lasse FS CPE REDSLACK Ed SAFETY FLOW SWITCH GREY PURPLE FLAMEROD H YELLOW IGNITOR HEATING ZONE VALVE 3 GAS VALVE al g B THERMISTOR uiu SUPPLY THERMISTOR ala RETURN ORANGE ORANGE BLOWER O RED WHITE PUMP BLACK BLUE RED RED THERMISTOR TANK AQUASTAT 30 426A
39. e commandes R tablissez l alimentation lectrique l appareil appuyez sur le bouton on off qui se trouve sur le panneau de commande appuyez sur le bouton noir qui se trouve sur le panneau de commande R glez le thermostat la temp rature d sir e Sil appareil ne fonctionne pas suivez les directives relatives la fermeture de l alimentation en gaz et communiquez avec votre technicien de service ou le fournisseur de gaz Faites tourner la valve de fermeture du gaz dans le sens des aiguilles d une montre et mettez la amp off N utilisez pas de force Replacez le couvercle avant 30 414A Endurance SECTION 6 Boiler Start Up 6A Common Vent Test At the time of removal of an existing boiler the following steps shall be followed with each appliance remaining connected to the common venting system placed in operation while the other appliances remaining connected to the common venting system are not in operation 1 Seal any unused opening in the common venting system 2 Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or restriction leakage corrosion and other deficiencies which could cause an unsafe condition 3 Insofar as is practical close all building doors and windows and all doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the build
40. e transformer require replacing shut off the 120 volt power Unplug the transformer wires from the PCB unscrew the two fixing screws and remove the transformer Fit the replacement transformer in reverse order 7G Blower The combustion air blower is a high pressure centrifugal blower It is powered by a 24VDC motor which is controlled by the PCB Its speed will be varied according to the temperature of the boiler flow If a blower change is required turn off the 120 volt power and unplug the wires from the blower motor Remove the four nuts from the blower discharge flange and the four screws that secure the gas manifold to the gas valve Remove the complete assembly Unscrew the combustion air inlet assembly and register plate from the fan Fit the replacement fan in reverse order ensuring that all joints are made correctly and sealed After replacement the combustion should be checked for correct air fuel ratio see Check Test and Start Up section 7H Transfer Tank EBP The transfer tank contains approximately 20 gallons of boiler water It functions as an energy storage vessel to reduce boiler cycling on small output heating zones and to provide additional heat for domestic hot water through the domestic hot water DHW plate heat exchanger If a tank change is necessary access to the tank is possible by removing the jacket s lower front panel This is done by removing the screws that hold the panel at the top and li
41. een the flame sensor connector and the yellow wire connector Start the boiler If the meter reading is less than 1 00 uA DC see 3 poor combustion below Check for air leaks at air inlet to blower 3 Inadequate gas supply Before proceeding ensure that the gas supply has not been shutoff or the LP tank LP boilers is not empty Then reset the boiler and observe the operational MEASUREMENTS AT HIGH FIRE NATURAL GAS CO2 9 0 9 6 MAX INPUT BT 175 270 OFFSET NAC 0 01 to 10 LP GAS CO2 9 7 10 1 MAX INPUT 175 270 OFFSET NWC 0 01 to 10 Table 4 EBP EDP 175 INLET PRESSURE PORT 4 to 13 INCHES WC INLET PRESSURE PORT 01 to 10 INCHES WC REMOVE OUTER TORX T40 AND ADJUST TORX BELOW Figure 29 JUMPER FAN 9 Figure 30 Jumper Wiring for Test and Calibration cycle Approximately 20 seconds after the start of the cycle the GV LED on the PCB should light If it does not reset the boiler and check for 24 VAC at the plug on the PCB If the voltage is less than 20 VAC and transformer voltage is 24 VAC replace the PCB If the voltage is correct connect a pressure gauge to the offset pressure port on the gas valve Reset the boiler and Endurance Page 29 SS
42. fting the panel away Isolate the appliance and drain down using the drain cock at the base of the tank Remove the tank sensor Undo the union and the pump flange bolts that connect the tank to the boiler unscrew the panel between the upper and lower compartments support the upper components and remove the tank Installation of the new tank is done in the reverse order After installation purge all air from the boiler before restarting 71 Thermostatic Union EDP EDN The thermostatic union is a 14 NPTF union which must be mounted at the flow outlet to control boiler temperature The union must be installed so that union nut is on the boiler side of the connection This insures that the thermostat is properly positioned with its spring facing up toward the system The element has two small bypass holes that allow some water to flow into the system at all times When the boiler first starts and the element is closed boiler water is re circulated back to the return until the supply water reaches 160 F 71 C The element then modulates open If the temperature does not exceed 150 F 66 C within two minutes after firing the element is not functioning properly To replace the element shut off and drain the section of the system adjacent to the thermostatic union Open the union and replace the element with a new one The element should be installed so that its spring and actuator are facing the system side up Close the union open
43. he 3 vent pipe positioned inside the 5 intake pipe The hot flue gases are surrounded by the intake flow of cooler outdoor air This vent system may be installed through and be in contact with combustible materials Except for roof vent kit max 7 vertical all venting should pitch away down from unit 2B Installing Direct Vent Kits The direct vent appliance is certified with a maximum of 15 linear feet 4 6m of vent pipe and three sets of elbows There are two basic vent kits available together with various additional elbow and extension kits if required see Figures 3 and 4 Detailed installation instructions are provided in the kits For additional length and or fittings the following components are available 3 and 5 elbow set Part Number 2400 330 5 x extensions Part Number 2400 332 5 x 2 extensions Part Number 2400 334 5 x 2 to 4 adjustable extensions 3 x 1 extensions 3 x 2 extensions 3 x 2 to 4 adjustable extensions Part Number 2400 336 Part Number 2400 338 Part Number 2400 340 Part Number 2400 342 2C Locating the Vent on an Outside Wall The center line of the vent opening must be at least 16 2 419mm above grade outside and at least 13 343mm from any other building opening such as doors windows etc Vent opening should be well away from shrubbery or other obstructions that would prevent free air flow to and from vent terminal Do not terminate vent under decks stairw
44. ing Turn on clothes dryers and any appliance not connected to the common venting system Turn on any exhaust fans such as range hoods and bathroom exhausts so they will operate at maximum speed Do not operate a summer exhaust fan Close fireplace dampers 4 Place in operation the appliance being inspected Follow the lighting instructions Adjust thermostat so appliance will operate continuously 5 Test for spillage at the draft hood relief opening after 5 minutes of main burner operation Use Page 17 the flame of a match or candle or smoke from a cigarette cigar or pipe 6 After it has been determined that each appliance remaining connected to the common venting system properly vents when tested as outlined above return doors windows exhaust fans fireplace dampers and any other gas burning appliance to their previous conditions of use 7 Any improper operation of the common venting system should be corrected so the installation conforms with the a National Fuel Gas Code ANSI 4223 1 latest edition b B149 When re sizing any portion of the common venting system the common venting system should be re sized to approach the minimum size as determined using the appropriate tables in Appendix F in the National Fuel Gas code ANSI Z223 1 latest edition and or Can CSA B149 Installation Codes 6A Common Vent Test Au moment du retrait d une chaudi re existante les mesures suivantes doivent t
45. ing the duct with an appliance vent terminal p n 2400 277 as shown in Figure 8 or with a large mesh screen Follow the special gas vent manufacturer s instructions for cleaning and sealing all parts before assembling Apply 14 bead of silicone sealer GE108 or Novagard 400 to the 3 flue outlet of the appliance approximately 1 from the end Slide 3 inner vent pipe or 1 880 adapter when using outer 3 telescoping section over the appliance flue outlet and push down to stop do not force pipe beyond stop Apply another bead of silicone around this joint and smooth out Apply bead of silicone to subsequent 3 joints An alternate nonconcentric combustion air source may be installed as shown in Figure 11 provided that the minimum 4 diameter combustion air duct does not exceed 15 4 6m Termination should include an air screen and be located in a qualified air space see Section 2E or outside SECTION 3 3A Gas Piping The appliance requires an inlet gas pressure of at least 4 w c 1 0kPa and no greater than 13 WC 3 2kPa Check with your local gas utility or supplier for availability of this pressure range Refer to Table 3 to size the supply piping to minimize pressure drop between meter or regulator and unit Endurance Page 9 Length Capacity of Pipe of Pipe 1 2 3 4 1 1 1 4 ft m MBTU h kW MBTU h kW MBTU h kW MBTU h kW 10 3 132
46. isolation valves and bleed air from the boiler and the system Follow the lighting instructions and start the boiler Check operation SECTION 8 Servicing 8A Sequence of Operation Figures 22 and 23 depict the flow paths and temperature sensor locations for the space heating EDP EDN and the combined space heating and domestic water heating EBP appliances The model EDP EDN modulating boilers are cold start boilers that will start only on a call for heat from a room thermostat or zone control contact During normal operation the Message Center MC LED display will indicate ON while awaiting a call for heat On a call for heat the following sequence will occur 1 The internal pump will start b After 5 seconds the blower prepurge cycle will start and operate for approximately 6 seconds while the MC indicates alternately and the current boiler outlet temperature 2 Following the prepurge cycle the ignitor will heat for 10 seconds while the blower continues to operate 3 The gas valve will then be energized green LED located on the PCB next to the display will light and open gas will flow and ignition will occur INTERNAL TO ENDURANCE THERMOSTATIC UNION SUPPLIED BOILER FLOW BYPASS SPACE HEATING RETURN Figure 27 EDP EDN Flow Schematic CONTRACTOR SUPPLIED THERMOSTATIC MIXING VALVE DOM HOT WATER OUT FLOW RESTRICTOR DOM
47. ixing valve 12 Hot port to hot water outlet from unit This valve should N oj f COLD INLET ENDURANCE COMB I FROM BACK HOT OUTLET A e Q MIXING VALVE TEMPERING COLD IN TO FIXTURES 3 ao 3 LOW RESTRICTOR be no higher than 120 F mixed delivery temperature or as local codes dictate LAARS RECOMMENDS ANTI SCALD TEMPERING MIXING VALVES see Figure 12 2 Connect gate or shutoff valve 3Xo tempering mixing valve water inlet 2 MIX port and cold 3 Install supplied flow restrictor 14 ahead of tempering mixing valve tee 4 Connect pressure relief valve Dif required by codes maximum 150 PSI as close to the unit as possible No other valves or restrictions may be installed between the Endurance and the relief valve DO NOT USE A TEMPERATURE PRESSURE RELIEF VALVE AS THIS IS NOT A STORAGE HOT WATER HEATER Note Installations with water containing 10 or more grains of hardness must be installed with appropriate water treatment Q HOT OUTLET C 25 COLD INLET ENDURANCE COMBI FROM BACK T amp P RELIEF VALVE TANK AQUASTAT STORAGE TANK HOT SUPPLY TO FIXTURES COLD WATER SUPPLY TN 27 ja l BRONZE CIRCULATOR Controlled by Tank Aquastat
48. move the flame sensor wire yellow from the boiler control board and check for continuity between the yellow wire terminal and the combustion chamber bottom pan If there is continuity the flame sensor is grounded An alternate way to check for grounding of the flame sensor is to check the ohms resistance between the yellow wire terminal and the combustion chamber bottom pan using a meter set for at least 100 000 ohms The resistance must be more than 250 000 ohms some technicians have been confused by meters which report infinite resistance with what appears to them as double zeros an infinite resistance reading means there is no grounding of the flame sensor If there is continuity or the ohms resistance is less than 250 000 ohms debris or moisture in the combustion chamber may be the cause To correct carefully remove the ignitor and flame sensor assembly Look for debris on the assembly where the flame rod exits the ceramic tube If debris exists remove it If this area is clean insert a pencil or other round object into the flame sensor hole in the bottom combustion chamber pan and roll it around to clear any debris that may exist inside the combustion chamber Replace the ignitor flame sensor assembly reconnect the yellow wire on the PCB and start the boiler If lockout persists check the flame signal To check the flame signal disconnect the yellow wire from the flame sensor connect a meter set for microamps uA DC betw
49. ng is NOT the same as shown by valve manufacturer ENDURANCE FIELD WIRING BOX Figure 23 Multiple Zones with Three Wire Zone Valves Requires Isolation Relay REMOVE CONNECT ONNECT MFG amp MODEL JUMPER BLUEWHITE REO REBIWHITE ARGO AR8 ZC ZR zc B amp G ZT ZC ZR zc XX HONEYWELL R8 2 2 H1 H2 TACO 005 PR JN PR JN 34 TACO SR502 2 zc XI X2 SINGLE RELAY 1 3 3 5 6 THERMOSTATS 0000 oo TYPICAL ZONE PUMPS RELAY 20 00 00 N P ZCH Xt x2 120 VOLT CIRCULATORS RED RED WHT BLUE WHT BOILER T T BOILER T T CIRULATOR ZONE VALVE HOT 120 VAC NEUTRAL 120 VAC HOT FIELD WIRING BOX Figure 24 Multiple Zones with Circulators and Room Thermostats W Y G L I NOTE This wiring required only for single zone applications utilizing D RQ 2 LI Re clock thermostats requiring 24 volt power supply RELAY 24 VOLT NO CONTACT LAARS P N 2400 060 L1 HOT p A gt L2 TO T T BOILER 24V 20VA CONNECTIONS TRANSFORMER Figure 25 Wiring for Single Zone Power Stealing Type Clock Thermostats That Require 24 VAC Endurance Page 15 FOR YOUR SAFETY READ BEFORE OPERATING AWARNING If you do not follow these instructions exactly a fire o
50. nit is in high fire To manually fix the unit in high fire locate the four pin connector on the bottom left of the control board and jumper the middle two terminals together see Figure 29 NOTE For EBP combination heat amp hot water units when the unit is in tank charge mode it will stay in high fire whether manually jumpered or not Note During the prepurge cycle the gauge will indicate several in W C negative pressure Adjust the CO and or offset pressure to the values shown in Table 4 When adjusting the offset pressure the CO will reduce as the offset pressure is adjusted more negative FINAL ADJUSTMENT OF THE OFFSET PRESSURE MUST ALWAYS RESULT IN A NEGATIVE PRESSURE UPON COMPLETION SECTION 10 Symptom Evaluations 10A Delayed ignition Possible Causes a Highlockup pressure LP boilers occurs on start up b Gas valve regulation problem occurs on start up c Incorrect gas orifice Natural gas orifice in an LP boiler occurs on start up d Defective burner occurs on startup or at burner shutdown High lock up pressure is the most common cause of delayed ignitions on LP fueled boilers It may result from an improper second stage regulator selection or from a faulty regulator Lock up can be detected by measuring the gas supply pressure to the boiler at the inlet pressure tap on the gas valve The gas supply to the boiler must be shut off before making this connection Use a water manome
51. om the minimum tank temperature sensor at 158 F tank charge mode In tank charge mode the red LED located below the green LED on the PCB will be lit In modes b and c which are priority modes the internal anti condensing valve will be closed On a T T call for heat the valve will remain closed until the priority modes are satisfied Service note as with the thermostatic union in the EDP EDN models the anti condensing valve prevents condensation on the combustion chamber coil and must be in the closed position when the coil inlet F6 indicates a temperature below 130 F 8B Trouble Shooting Fault Codes The Endurance boiler is controlled by a Pactrol integrated boiler control PCB which provides eight fault codes with eight memories To obtain fault messages press in on the message center fault button until the first fault code FLI is displayed If a thermistor error occurs it will appear on the LED upon power up The memory does not need to be accessed Memory fault codes are for error history only All thermistor faults will show as F codes on the LED and will never cause the LED to read LO Note that the unit is shipped with error codes already in memory and an error code that is shown in memory upon start up of a new unit is from manufacturing testing The last recorded fault will appear e g F 4 flow thermister faulty open or shorted The control will then sequence through all eight memories indic
52. omatic fill valve Locate in boiler outlet piping 9 If codes require install suitable back flow preventer between automatic fill valve and city main 10 The appliance may be installed in single and multiple zone systems using either zone valves Endurance Page 11 Q CONTRACTOR SUPPLIED SYSTEM AIR VENT CIRCULATOR SYSTEM SUPPLY PIPING SYSTEM SUPPLY PIPING SYSTEM RETURN PIPING AIR PURGER AUTO FILL STOP amp WASTE VALVE OR BALL VALVE 12 PSI MIN TEE amp BOILER DRAIN FOR SUSTEM PURGING BOILER FEED WATER DIAPHRAGM EXPANSION TANK BALL VALVE BACKFLOW PREVENTER BYPASS REQUIRED WHEN SYSTEM PUMP INSTALLED REQUIRED WHEN MODEL EDP EBP 110 HAS 3 OR MORE ZONES EDP EBP 175 HAS 5 OR MORE ZONES Figure 15 Hydronic Piping EDP EBP with Zone Valves RADIANT 1 140 F K n 12 MAX 120 F KI 12 180 F da 2 BASEBOARD RADIANT EBP EDP Figure 16 Piping Single EDP EBP Boiler for Multiple Temperature Systems AUTO ines WIRE TO ZONE BACKFLOW FILL VALVE END SWITCHES PREVENTER VALVE OR RELAY CONTACTS BOILER AIR ADDITIONAL ZONES FEED ELIMINATOR WATER D THERMO STATIC DIAPHRAGM 1 1 i 1 UNION EXPANSION SUPPLIED RANK 1 BLUE WIRE 1 1 BUFFER TEMPERING i TA
53. owing through the DHW heat exchanger and therefor the DHW will not be heated To test the switch place a temporary jumper across the back of the connector on the PCB see wiring diagrams for connector location If the internal pump operates and there is DHW generated then the water flow switch is faulty and must be replaced Note Switch orientation is critical for proper switch operation The identification plate on the switch must face up and the arrow on the plate must point in the direction of flow Failure of the mixing valve will allow cold water to be mixed with the hot water from the DHW heat exchanger during a DHW draw regardless of the setting of the mixing valve or the temperature of the water leaving the DHW heat exchanger The failure can be detected by observing the temperature of the three pipes connected to the mixing valve If the mix temperature is luke warm or cool and the hot temperature is hot and the cold temperature is cold then the mixing valve is either faulty or incorrectly adjusted and must be replaced or adjusted DHW heat exchanger scaling may occur in some areas of the country where there are high concentrations of minerals in the water These minerals may cause fouling of the DHW heat exchanger over an extended period of time lime build up Other minerals which react more quickly in well systems mostly magnesium cause slime on the inside of the heat exchanger and prevent adequate heat
54. r by hand Turn off all electric power to the appliance Remove conirol access panel andtop front cover Turn gas shutoff valve clockwise to off Handle will be horizontal do not force Wait five 5 minutes to clear out any gas If you then smell gas STOP Follow B in the safety information above on this label If you don t smell gas go to next step Turn gas shutoff valve counterclockwise lt to Combinat Gas Shutoff Handle will be vertical Gas Control Replace top front cover and control access panel Turn on all electric power to appliance depress on off button on control panel depress black button on top of control panel Set thermostat to desired setting If the appliance will not operate follow the instructions To Turn Off Gas To Appliance and call your service technician or gas supplier Set the thermostat to lowest setting Turn gas shutoff valve clockwise off Do Turn off all electric power to the appliance if not force Service is to be performed Replace top front cover and control access Remove control access panel and top front panel cover Page 16 LAARS HEATING SYSTEMS PAR MESURE DE PRUDENCE LISEZ CE QUI SUIT AVANT DE FAIRE FONCTIONNER L APPAREIL AMISE EN GARDE Si vous ne suivez pas ces instructions la lettre un incendie ou une explosion pourrait se produire et causer des dommages mat riels des blessures personnelles ou m me l
55. r explosion may result causing property damage personal injury or loss of life This appliance does not have a pilot It is f you cannot reach your gas supplier call the equipped with an ignition device which fire department automatically lights the burner Do not try to light C Turn off gas shutoff valve located above the the burner by hand combination gas control so that the handle is BEFORE OPERATING smell all around the aligned across the gas pipe If the handle will appliance area for gas Be sure to smell next to not turn by hand don t try to repair it call a the floor because some gas is heavier than air qualified service technician Force or attempted and will settle on the floor repair may result in a fire or explosion WHAT TO DO IF YOU SMELL GAS Do not use this appliance if any part has been Do not try to light any appliance under water Immediately call a qualified service Do not touch any electric switch do not use technician to inspect the appliance and to any phone in your building replace any part of the control system and any Immediately call your gas supplier from a gas control which has been under water neighbor s phone Follow the gas supplier s instructions OPERATING INSTRUCTIONS STOP Read the safety information above on This appliance is equipped with an ignition this label device which automatically lights the burner Set the thermostat to lowest setting Do not try to light the burne
56. r poor connection at sensor plug If they are OK disconnect the sensor plug and check the resistance across the sensor terminals The resistance of a good sensor is 10 000 ohms 77 F 25 C Replace sensor if resistance is less than 500 or more than 20 000 ohms F 5 Correct in the same manner as F 4 F 6 Correct in the same manner as F 4 8B 3 Resolving Lockouts LO The memory does not need to be accessed Memory fault codes are for error history only All thermistor faults will show as F codes on the LED and will never cause the LED to read LO There are many causes for lockouts The five most common causes are 1 poor combustion Endurance Page 23 Power Up NO Is Power LED On YES NO Does Display Illuminate YES Does Display NO Show bFt YES Does Fan YES End Power Up POWER UP FAULT TREE Bad Line Connection Bad Neutral Connection Fuse F1 Blown right side fuse 4A 250V Faulty Main PCB Bad Transformer Connections Faulty Transformer 24VAC Fuse F2 Blown middle fuse 4Amp 250V Faulty Main PCB 0 No Fault 1 Error Faulty Main PCB 2 Mechanical Overheat Stat Fault 3 Fan Fault F 4 Flow Temperature Sensor Fault F 5 Tank Temperature Sensor Fault F 6 Return Temperature Sensor Fault F PCB in Reset Mode Repair Fault Code and Reset Boiler F F F ES Bad Fan Connection or Broken Wire Faulty Fan 24VDC Faulty Main PCB Page 2
57. rature when the appliance is operating in one of its demand modes It also allows the user to obtain information from the appliance to determine the water temperature at three different locations within the appliance and to find up to 8 previous faults stored in memory If replacement of PCB is necessary shut off the 120 volt power and disconnect the wire connectors from the pcb Remove the PCB from its location posts Page 20 LAARS HEATING SYSTEMS Replace in reverse order ensuring that the connections are correct EBP combination units only Ignitor Flame Sensor Assembly The ignitor is a glow bar type ceramic composite device It is energized whenever there is a call for heat and switched off when ignition is established The flame sensor is a remote sensing flame rod which is connected directly to the circuit board J5 terminal The ignitor should read 50 to 100 ohms resistance when at room temperature If the ignitor fails and the assembly must be replaced always install a new ignitor gasket with the replacement assembly For sequence of operation see Section 8 Servicing d Caution Ignitor gets hot 7F Transformer The control transformer accepts 120 VAC line voltage and provides 80 VA of 24 VAC control voltage for the boiler control ONLY It is NOT capable of supplying control voltage for external devices such as zone valves which MUST have their own separate power supply Should th
58. re prises pour chaque appareil toujours raccord au syst me d evacuation commun et qui fonctionne alors que d autres appareils toujours raccord s au syst me d vacuation ne fonctionnent pas 1 Sceller toutes les ouvertures non utilis es du syst me d vacuation 2 Inspecter de facon visuelle le syst me d vacuation pour d terminer la grosseur et l inclinaison horiztonale qui conviennent et s assurer que le syst me est exempt Message Identifies Boiler Flow Temp Supply Tank Temp Return Temp Boiler Inlet On Off Lock Out Combustion Related Fault Code Three There are 8 different Fault Codes defined Freeze Protection To read or change mode During operation display will default to supply temperature Press temperatures button repetitively To sequence through three temperature indicators Boiler in standby mode will operate on call for domestic water or heat zone demand Boiler switched OFF Press ON OFF button for ON After three trials for ignition will stand in lockout Press reset on top of panel to retry A fault code may be indicated on the display prior to pushing the reset button or switching the on off button or power switch Observe code and note it for servicing H Sensor has detected return temperature below 39 F 4 C Figure 26 Typical Display Identification Codes Page 18 d obstruction d tranglement de fuite de corrosion
59. tallations must be made in accordance with 1 National Fuel Gas Code ANSI Z223 1 latest edition or 2 B149 Installation Codes for Gas Burning appliances and Equipment and with the requirements of the local utility or other authorities having jurisdiction Such application requirements take precedence over the general instructions contained herein All electrical wiring is to be done in accordance with 1 The National Electrical Code ANSI NFPA70 latest edition or COQ Figure 1 Combo Heating Domestic Water Model Figure 2 Heating Unit Model EDP EDN Page 4 LAARS HEATING SYSTEMS 2 The CSA standard C22 1 Canadian Electrical Code Part 1 and local codes All vent installations must be made in accordance with 1 Part 7 Venting of Equipment of the National Fuel Gas Code ANSI 223 1 latest edition or applicable provisions of the local building codes or 2 CAN CGA B149 When required by the jurisdiction authority the installations must conform to the American Society of Mechanical Engineers Safety Code for Controls and Safety Devices for Automatically Fired Boilers No CSD 1 1C Unpacking the Appliance Remove all packing and tie down materials Make immediate claims to the carrier if the appliance and its packaging are damaged 1D Locating the Appliance The appliance is
60. ter or pressure gauge with a scale reading of at least 25 in w c or 15 oz in Loosen the screw in the gas valve pressure port one full turn and install a hose from the pressure gauge over the pressure port Turn on the gas supply The ENDURANCE boiler is designed to operate with supply pressures of 4 13 in w c 2 3 7 5 oz in If the supply pressure exceeds 13 in w c 7 5 oz in with the boiler not operating it is possible that this may be the cause of delayed ignitions and the pressure must be reset to 9 in w c 5 2 oz 1n2 Restart the boiler and then switch it off again Lock up pressures must be measured when the boiler is not operating and preferably immediately after boiler shutdown If the gas pressure again exceeds the allowable values correct the lock up problem Page 32 LAARS HEATING SYSTEMS Gas valve regulation problems can also cause delayed ignitions See Gas valve calibration Incorrect gas orifice Check orifice size A defective burner can cause a delayed ignition during operation or at shutdown If the gas supply pressure is proper the gas valve is functioning properly and the gas orifice is correct the burner should be inspected To inspect it remove the blower The burner is retained by the blower and it will drop out of the bottom of the chamber when the blower is removed There should be no distortion or perforations in the burner other than the punched holes Replace if indicated
61. the valves refill and bleed the system Ensure that air is venting from the air vent on top of the boiler chamber and it is left operational Restart boiler 7J Cleaning the Boiler Coil The Endurance is equipped with a premixed combustion system This type of combustion system does not create free carbon soot except in very rare instances and therefor the combustion chamber coil will probably never need cleaning If cleaning is required proceed as follows valve off the boiler switch off the electrical power at the disconnect switch drain 1 2 gallons 4 8L of water from the boiler drain remove the flue assembly from the top of the boiler remove the pump flange bolts from the top pump flange disconnect the sensor wires from the sensors boiler flow return and safety limit undo the union nut from the boiler flow manifold and remove the four 4 screws from the bottom gas valve flange The boiler assembly may now be removed from the jacket After removal of the boiler assembly from the Endurance Page 21 jacket remove the four 4 long screws that secure the top and bottom pans Remove the air vent and the top pan Remove the insulation retainer and the coil cover insulation Clean the boiler coil with a wire brush and vacuum debris from the combustion chamber avoid hitting the ignitor or the flame sensor with the brush or vacuum hose because they are fragile After cleaning assemble the parts in the reverse order open
62. transfer These minerals must be filtered out by a special incoming water filter or by the addition of an inhibitor to protect the coil and provide acceptable water quality Minerals may be removed when necessary by flushing the coil with a cleaner such as Unlime or Sizzle 10E High Gas Consumption Boilers operating with an improper air fuel ratio are very inefficient and consequently have very high gas consumption Because efficiency is high when the CO is high boilers operating with low CO especially LP boilers consume more gas Adjust the CO or for optimum efficiency If no combustion analyzing equipment CO or O2 is available then a proper adjustment of the air fuel ratio CO2 can not be accomplished However by briefly sniffing the flue gases it is possible to determine if the CO or Oz is within the proper range There is no significant flue gas odor when combustion is proper strong piercing smell indicates poor combustion and generally a lean mixture low CO Check gas valve calibration offset adjustment and adjust if indicated Do not attempt to correct combustion by reorificing without an O2 or CO kit Page 34 LAARS HEATING SYSTEMS SECTION 11 Description Part EM Number Parts Identification 18 GASKET BLOWER 2400 540 19 WATER FLOW SWITCH 2400 542 Description Part 20 BOILER CONTROL BEHIND PANEL EBP 2400 546 Number 21 GAS VALVE HONEYWELL 1 PAN COMBUSTION CHAMBER T
63. trol panel and the reset button on top of the control panel The pump and the blower will start the display will show Ft boiler flow temperature for 1 second intervals and the actual temperature e g 127 in degrees F for 3 second intervals Endurance Page 19 The appliance will attempt to ignite three times if ignition is not successful the appliance will lock out and display L0 Ignition reset is done by pressing the reset button on top of the control panel EBP models will then operate to heat the transfer tank 7 EBP ONLY Turn on hot water tap This puts the appliance in the DHW mode d Caution Should any pronounced odor of gas be detected or if the gas burner does not appear to be functioning in a normal manner close main shutoff valve do not shut off switch and contact your heating contractor gas company or factory representative You MUST check flame monitoring control ignition system safety shut off device 1 Close gas shutoff valve with burner operating 2 The flame indicator light will go out and blower will continue to run for the post purge cycle Three additional attempts to light will follow including pre purge ignitor on valve flame on and post purge Ignition will not occur as the gas is off The display will eventually show LG approximately 10 seconds after the gas valve has closed on the third ignition attempt 3 Open gas shutoff valve Press reset button on the
64. uel Gas Code ANSI Z223 1 NFPA 54 et ou aux codes d installation CAN CGA B149 Si la grosseur d une section du syst me devrait tre modifi ppour respecter les valeurs minimales des tableaux pertinents de l appendice F du National Fuel Gas Code ANSI Z223 1 NFPA 54 et ou des codes d installation CAN CGA B 149 Filling the System Open all supply and return valves Fill heating system to minimum operating pressure 12 psig Loosen screw in coin vent and allow any trapped air to escape Collect any water that escapes so that it does not drip on the blower electronics and damage them Small amounts of air that may remain will be purged by the internal pump Tighten screw after purging The manual operation lever located on the side of the valve operator requires moderate pressure to latch the valve open and then again to unlatch it and allow it to close 10 11 6C LAARS HEATING SYSTEMS Purge all lines by opening vents Close gas shutoff valve located above gas valve Turn on 120 volt power the display will initially display for five seconds before displaying OFF If the temperature sensor detects a temperature below 39 F 4 C it will display E The appliance will then be in the frost protection mode The pump initially runs alone for 5 minutes or until the flow temperature reaches 45 F 7 C EBP ONLY When the internal zone valve is manually opened the water will be pumped to the sp
65. y IV installations is not obstructed In general only direct vent installations have the potential for cross contamination flue products entering the combustion air stream of the combustion air source This may be caused by leaky joints in the 3 flue pipe located inside the 5 combustion air pipe If this is suspected remove the front panel from the appliance reset the boiler and allow it to go through a normal cycle If during this cycle there is no flue odor repair the leaky joints in the flue pipe SECTION 9 Gas Valve Calibration 9A Gas Valve Calibration offset adjustment If poor combustion is suspected because of a strong exhaust smell pulsation in the exhaust or nuisance flame failure lockouts shown as LO on LED the gas valve offset pressure and exhaust CO2 should be checked and adjusted if required A magnehelic pressure gauge with 0 1 in w c divisions and a CO tester are required for this adjustment Note Direct vent installations may experience poor combustion that results from cross contamination of the combustion air source Check for cross contamination before attempting offset pressure adjustment see Section 8B 3 5 CO sampling may be taken at the exhaust terminal or at the sample port on the 3 exhaust located inside the front panel top cover See Figure 28 for the location of the offset pressure port and offset adjustment The CO values shown in Table 4 should be achieved when the u

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