Navien LCB700-21LC Installation & Operation Manual Download Page 11

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About the Boiler 11

2.4 Components

Internal Model

The following diagram shows the key components of the boiler. Component assembly diagrams and particular parts lists are included in
the Appendixes.

Circulation Pump*

Pressure Relief Valve

Air Pressure Sensor

Pressure Sensor

Heating Return

Flue
Temperature Sensor

Heating Supply

Auto Air Vent

Flue Duct

Oil Burner

Main Controller

Front Panel

Heating Supply

Temperature Sensor

Heat Exchanger

Expansion Vessel*

Condensate Trap

* The expansion vessel and circulation pump are not included in the regular model.

Summary of Contents for LCB700-21LC

Page 1: ...X Keep this manual near this boiler for future reference whenever maintenance or service is required Installation Operation Manual WARNING If the information in these instructions is not followed exac...

Page 2: ...e 37 6 5 Fixing the Flue 37 7 Setting the DIP Switches 38 7 1 PCB DIP Switches 38 7 2 Front Panel DIP Switches 38 8 Connecting the Power Supply 40 9 Connecting Electrical Supplies 41 9 1 Accessing the...

Page 3: ...but of importance to the user DANGER If oil fumes or leaks from the appliance Extinguish any naked flames Isolate the electrical supply Isolate the fuel supply to the boiler Rectify the fault Do not...

Page 4: ...explosion Do not place combustibles such as newspapers or laundry near the boiler or flue system Doing so may result in a fire Do not place or use hair sprays spray paints or any other compressed gas...

Page 5: ...egree burn 70 C Less than 1 second 60 C 1 second 55 C 10 seconds 49 C 10 minutes 37 C Very low scald risk CAUTION Do not turn on the boiler unless the water and oil supplies are fully opened Doing so...

Page 6: ...rk to ensure that the installation complies with the regulations Installation Failure to install appliances correctly could lead to prosecution The appliance should be installed by a competent person...

Page 7: ...e Regional requirements Republic of Ireland EC Conformity Declaration Navien hereby declares that the LCB700 models to which this declaration refers conform to and comply with the essential requiremen...

Page 8: ...boiler disable any parts that could be potentially hazardous A B C D E F G 2015 811 2013 dB kW A A A B C D E F G A A KD Navien NCB 24LSWE XL 20 40 Installation Operation Manual ErP Label Oil Pump Ret...

Page 9: ...ection Central Heating supply return DHW Domestic Hot Water Outlet DCW Domestic Cold Water Inlet Condensate 21 5 21 5 Oil inch 1 4 BSP Male 1 4 BSP Male Flue System Flue Size Coaxial 100 60 plastic Co...

Page 10: ...3 97 56 97 91 Auxiliary electricity consumption At full load elmax 0 0935 0 1013 0 1242 At part load elmin 0 0281 0 0268 0 0328 In standby mode PSB 0 0016 0 0018 0 0017 Other items Standby heat loss P...

Page 11: ...ded in the Appendixes Circulation Pump Pressure Relief Valve Air Pressure Sensor Pressure Sensor Heating Return Flue Temperature Sensor Heating Supply Auto Air Vent Flue Duct Oil Burner Main Controlle...

Page 12: ...e boiler Component assembly diagrams and particular parts lists are included in the Appendixes Oil Burner Main Controller Front Panel Expansion Vessel Heat Exchanger Flue Duct Auto Air Vent Auto Air V...

Page 13: ...ppendixes Circulation Pump Pressure Relief Valve Air Pressure Sensor Pressure Sensor Flue Temperature Sensor Heating Supply Heating Return Auto Air Vent Flue Duct Oil Burner Main Controller Front Pane...

Page 14: ...oiler Component assembly diagrams and particular parts lists are included in the Appendixes Oil Burner Front Panel Expansion Vessel Heat Exchanger Flue Duct Cold Water Inlet DHW Outlet CH Return CH Su...

Page 15: ...LCB700 21RS RSX 21LS LSX 28RS RSX 28LS LSX 36RS RSX 36LS LSX A Flue Exhaust 60 100 B Central Heating Supply 22 22 22 28 C Central Heating Return 22 22 22 28 D Oil Supply Inlet 1 4 Ball Valve Female E...

Page 16: ...aust 60 100 B Central Heating Supply C Central Heating Return D DCW Inlet 1 4 Ball Valve Female E DHW Outlet More than 21 5 Plastic Pipe F Oil Supply Inlet 1 4 Ball Valve Female G Condensate Drain Mor...

Page 17: ...easy installation of the LCB700 boiler in its final location A detailed description is given of the procedure in the sequenced sections below Installation Location Oil connection Electrical connectio...

Page 18: ...requirements and recommendations stipulated in the Regulation for Heating Installations in Buildings RITE and any other applicable legislation in this field must be observed 3 2 Choosing an Installat...

Page 19: ...boiler or its ue system Adequate Installation Clearances CAUTION Do not install the boiler on carpet s Install the boiler in an area that allows for service and maintenance access to utility connecti...

Page 20: ...compliance with the requirements in standard BS 7593 In areas with hard water treatment may be necessary in order to prevent scale from forming in the boiler Make sure to use the water treatment produ...

Page 21: ...tems requires specially formulated glycol which contains inhibitors to prevent the glycol from attacking the metallic system components Before using freeze protection products ensure that system fluid...

Page 22: ...lated from the boiler anytime the system is operating Failure to follow these instructions may lead to discharge from the pressure relief valve which may result in property damage or injury Pressure R...

Page 23: ...han the minimum rate use an external pump below 100 W to maintain a flow rate above the minimum Also ensure the pipes used for the boilers are not blocked and check if there are any pressure drops CAU...

Page 24: ...p Sensor Auto Air Vent Pressure Gauge Heat Exchanger Regular Boiler S Plan Layout 2Way Valve Y Plan Layout 3Way Valve Auto Air Vent Temp Sensor Filling Loop Circulating Pump DHW Tank Regular Boiler He...

Page 25: ...ION For correct installation and trouble free operation of the appliance the following advice should be followed All condensate pipework must fall from the appliance by a minimum of 3 degrees 52 mm pe...

Page 26: ...luded in the accessory To connect the condensate drain 1 Connect an integrated drain hose to the 21 5 mm at the bottom of the boiler Use only corrosion resistant material for the integrated drain hose...

Page 27: ...testing check the system thoroughly for leaks Repair any leaks before proceeding further WARNING Eliminateallsystemleaks Thecontinualintroductionoffresh makeup water will reduce boiler life Minerals c...

Page 28: ...are described in OFTEC book 3 In Northern Ireland the Building Regulations do not currently cover the installation of oil storage tanks In the Republic of Ireland the requirements of BS 5410 Part 1 20...

Page 29: ...use the oil line nipple included with the boiler to connect the flexible hose to the fuel pipe of the oil storage tank Oil Storage Tank Fuel Pipe Boiler Oil Line Nipple Flexible Hose CAUTION The oil...

Page 30: ...ve the oil pump Where the maximum oil level in the oil storage tank exceeds 4 metres a head breaking device must be installed between the tank and the boiler oil pump Oil Storage Tank Min 1 m Max 4 m...

Page 31: ...n valve should be fitted in the supply pipe together with the filter and fire valve A non return valve should be fitted in the return pipe if the top of the tank is above the burner The pump vacuum sh...

Page 32: ...rator or fitted to the oil line between the oil storage tank and the de aerator A top feed oil tank fitted with a de aerator using an internal non return valve should have any non return valves fitted...

Page 33: ...ine plug is supplied in the boiler accessory pack Pressure Connection Stage 2 Valve Pressure Regulator Stage 2 Pressure Regulator Stage 1 Oil Return Line Stage 1 Valve Cartridge Filter Oil Nozzle Conn...

Page 34: ...connecting the flue outlet must be correctly joined using sealing gaskets Ensure that there are no leaks from any part of the removal circuit Switch off the boiler and wait for the pipes to cool down...

Page 35: ...3 80 125 68 45 1 0 90 2 2 Note For vertical ducts the outlet must be at least 60 cm from any opening The dimensions B C D and E may be reduced to 25 mm as long as the flue terminal is extended to clea...

Page 36: ...minal The total length of the tubes must not exceed the maximum value defined If the removal installation includes elbows while calculating the total length you must take into account that each elbow...

Page 37: ...22 m horizontal clearance is maintained 6 5 Fixing the Flue After installing the flue vent fasten the screw to fix the flue vent to the flue duct Use screws supplied by Navien Flue connections must b...

Page 38: ...SW1 SW2 Switch 1 Function Setting 1 2 Operation Status Normal Default 1 OFF 2 OFF Stage 1 Low 1 OFF 2 ON 1 ON 2 ON Stage 2 High 1 ON 2 OFF 3 Boiler Type Solo System Regular 3 OFF Combi 3 ON 4 Not Used...

Page 39: ...tting 6 7 8 CH Heat Demand Switched Live 6 OFF 7 OFF 8 OFF CH Thermostat 6 ON 7 OFF 8 OFF Navien Thermostat 6 OFF 7 ON 8 OFF OT R C 6 ON 7 ON 8 OFF Not Used 6 OFF 7 OFF 8 ON Not Used 6 ON 7 OFF 8 ON N...

Page 40: ...er must be electrically grounded If wiring the boiler directly to a power supply do not attach the ground wire to oil or water pipes as plastic pipe or dielectric unions may prevent proper grounding W...

Page 41: ...boiler and particularly on the electric terminal strips If the electrical supply is connected electrical contact could occur causing serious damage due to electrocution CAUTION Label all wires before...

Page 42: ...egular DHW Valve S Y plan c System Regular CH Valve S Y W plan d Junction box connection 1 CH_ON 2 DHW_ON 3 DHW_OFF 4 AC Thermostat Switched Live 5 L Note The AC Thermostat Switched Live and L termina...

Page 43: ...H thermostat 6 ON 7 OFF 8 OFF Navien Thermostat 6 OFF 7 ON 8 OFF OT RC 6 ON 7 ON 8 OFF Not used 6 OFF 7 OFF 8 ON Not used 6 ON 7 OFF 8 ON Not used 6 OFF 7 ON 8 ON Not used 6 ON 7 ON 8 ON 9 3 2 DHWTank...

Page 44: ...tage DC application part Room Controller OpenTherm Protocol 0 0 0 21 0 Low Voltage DC Application Part Note OpenTherm is an industry standard modulating control available from several control manufact...

Page 45: ...in the low voltage DC application part CH Thermostat 0 0 0 21 0 Low Voltage DC Application Part 9 4 4 Connecting the OutdoorTemperature Sensor The boiler is designed to be able to function with an out...

Page 46: ...n the AC application part It only operates when there is an operating signal from the CH thermostat Brown 1 Blue 0 0 1 0 AC Application Part 1 9 5 2 Connecting the 2 Port Diverter Valve DHW The boiler...

Page 47: ...an operating signal from the cylinder stat or CH thermostat Brown 1 Blue 0 0 1 0 CH N C DHW N O 1 AC Application Part 1 9 5 4 Connecting the 3 Way Valve Type C Contact The boiler is designed to be co...

Page 48: ...s 1 5 of the CONM4 in the AC application part and the CONZ3 POWER OUT in the AC power line part 2 Port Zone Valve Motor 2 Port Zone Valve Motor 1 2 3 4 5 6 7 8 9 10 HTG HW Wiring Centre Grey Grey Oran...

Page 49: ...of the CONM4 in the AC application part and the CONZ3 POWER OUT in the AC power line part Cylinder Stat Grey Orange 3 Port Mid Position Zone Valve 1 2 C White Room Stat 2 1 3 1 2 3 4 5 6 7 8 9 10 Gre...

Page 50: ...the proper system pressure If antifreeze has been used is it the proper type and is the concentration appropriate Did you install an automatic bypass valve of at least 6 min when connected to radiato...

Page 51: ...this manual Are the outlets and horizontal tubes of the flue sloping upwards about 3 degrees Are the air intake and flue connections on the lines correctly sealed Is the total flue length within the...

Page 52: ...nd Indicates the central heating demand is present h DHW demand Indicates that DHW demand is present i Central heating set temperature When the central heating temperature is set Displays the currentl...

Page 53: ...ed for the boiler s operation such as central heating and DHW supply temperatures Refer to the following table for detailed information a Back button Return to the previous menu or screen b Mode butto...

Page 54: ...re 5 Press the Back button to return to normal operation mode or rotate the Command dial to adjust other operation conditions 11 2 Turning the Boiler on or off To turn the boiler on or off press the P...

Page 55: ...ater temperature 1 In normal operation mode rotate the Command dial The central heating temperature is highlighted on the screen 2 Rotate the Command dial to the right to select the DHW temperature 3...

Page 56: ...ng Basic Information To view information about the boiler press the Menu button and then select 2 Status Information Rotate the Command dial to switch between the information items Press the Command d...

Page 57: ...ystem Regular Models Item Description 1 Operation State Current Operation State 2 Heat Capacity Heat capacity Low or High 3 CH Set Temp Central heating set temperature C 4 DHW Set Temp DHW indirect su...

Page 58: ...r s central heating operation press the Menu button and then select 3 Central Htg Operation Rotate the Command dial to switch between the list items or to increase decrease setting values Press the Co...

Page 59: ...mand for weekday and weekend 3 5 1 1 Day Schedule a command for weekdays Saturdays and Sundays 4 OFF Not Used Disable the schedule function Rotate the Command dial to switch between the list items or...

Page 60: ...can press the Power button to clear a level1 error Then the error is cleared if the problem has been resolved Combi Models Central Heating Mode Item Description 1 7 Day Schedule a command for each day...

Page 61: ...lsius C 3 PSI BAR Setting Select the water pressure unit 1 PSI 2 BAR Default BAR 4 Time Setting Set the system clock RTC Display format YYYY MM DD HH MM SS 5 Backlight Time Setting Set the backlight t...

Page 62: ...tatus 6 3 Way Valve 3 Way valve output status 7 HTL Input Status HTL input status 11 5 Accessing Advanced Menu Items 11 5 1 Viewing Service Information To view service information about the boiler pre...

Page 63: ...ling time Setting range 0 20 min Default 3 min 6 Burner Switching Diff Set the temperature range for the SH combustion switch Setting range 5 C 30 C Default 5 C 7 Freeze protection Set the pump freeze...

Page 64: ...notification Setting range 30 3650 days 10 years It can be set in 10 day increments Default 1820 days 5 years Item Description 10 Oil CMPS Rate Set the oil consumption compensation rate Setting range...

Page 65: ...erating times Setting range 300 36500 cycles It can be set in 100 cycle increments Default 18200 cycles 16 Factory Reset Initialize all parameter settings panel and main controller to factory default...

Page 66: ...peration The 2 way valve is turned on as soon as you enter the test mode Press the command dial to toggle the valve operation On Off Off On Note This option is not performed on Combi boilers 5 3 Way V...

Page 67: ...Water Supply E302 Low water pressure Manual E352 High water pressure Manual E353 Abnormal operation Water pressure sensor Auto DHW Circulation E407 DHW Outlet thermistor Open or Short Circuit Alarm E...

Page 68: ...Keep it as dry as possible 12 2 Draining the Boiler You will need to drain either both the central heating side and domestic hot water DHW side or one side only before performing maintenance tasks suc...

Page 69: ...tection function will operate regardless of whether or not the power is turned on or off as long as the electric supply is still connected Do not close the oil valve except for routine maintenance as...

Page 70: ...f every heating season and or when there is a problem 12 4 Maintenance Schedules Owner maintenance Daily Check boiler area Check pressure temperature gauge Monthly Check flue piping Check condensate d...

Page 71: ...rature shipped with the boiler Failure to perform the service and maintenance could result in damage to the boiler or system Failure to follow the directions in this manual and component literature co...

Page 72: ...eck the cold fill pressure for the system Verify it is correct must be a minimum of 0 8 bar 3 Watch the system pressure as the boiler heats up during testing to ensure pressure does not rise too high...

Page 73: ...28RS RSX 28LS LSX 36RS RSX 36LS LSX Ignition Dim A 32 mm 37 mm 42 mm B 18 mm 20 mm 26 mm C 3 0 5 mm 3 0 5 mm 3 0 5 mm Replacing the Flexible Oil Hose and Oil Nozzle CAUTION Using a worn out flexible...

Page 74: ...il S Pattern Oil Nozzle Oil Nozzle 0 45G 80 S 0 55G 80 S 0 65G 80 S Oil Pressure Low 9 5 bar 9 5 bar 9 5 bar High 13 5 bar 14 bar 14 bar Checking the Ignition Ground Wiring 1 Check that the ground wir...

Page 75: ...formation Manual with the owner 2 Emphasize the need to perform the maintenance schedule 3 Remind the owner of the need to call a licensed contractor should the boiler or system exhibit any unusual be...

Page 76: ...ONZ3 CONN1 ORZ RQWURO 9DOYH 0 RQWURO 9DOYH ORZ 6HQVRU 6ZLWFK 62 9DOYH 62 9DOYH 6 Br B B P Br Br P B AC 230V INPUT Wiring Center CH_ON DHW_ON DHW_OFF 6ZLWFKHG LYH D 9DOYH 2WAY_L 2WAY_N D 9DOYH B Bk R 3...

Page 77: ...021890A Regular Controller 30021891A Combi Combi System Regular Panel Panel 2 30021314A 30024506A 3 Front Case 20043423A Internal System Regular Front Case 20046860A Internal Combi Front Case 20044629...

Page 78: ...78 Appendices 13 2 2 Burner Cover Flame Tube...

Page 79: ...0 Back Draft Damper 30008825A 11 Fan Assembly 30021329A 21 28 Fan Assembly 30021328A 36 12 Intake Pipe Assembly 30021807A 21 Intake Pipe Assembly 30021809A 28 Intake Pipe Assembly 30021827A 36 13 Comb...

Page 80: ...80 Appendices Oil Pump Coupling Orifice Swirl Plate Oil Pump Motor Oil Pump Intake Pipe Flame Holder Assembly...

Page 81: ...451A 36 2 Oil Nozzle Kerosene 20043603A 21 Oil Nozzle Kerosene 20043604A 28 Oil Nozzle Kerosene 20043605A 36 Oil Nozzle Light Oil 20047433A 21 Oil Nozzle Light Oil 20047434A 28 Oil Nozzle Light Oil 20...

Page 82: ...82 Appendices 13 2 3 Heat ExchangerTurbulence and Exhaust Duct Cover Burner Assembly Silencer 3 2 1 5 4 12 6 7 8 9 10 11 13...

Page 83: ...20043515A 5 High Limit Stat for Heat Exchanger 30002557A 6 Packing for Exhaust 20029713A 7 Air Supply Packing 20043645A 8 Exhaust Duct 30021130A System Regular 30023172A Combi 9 Temperature Sensor 30...

Page 84: ...14 16 17 4 6 3 17 8 Screw Clip Condensate Trap Cover Ball Guide Packing Case Packing Clip Ball Ball Packing Ball Guide Condensate Trap Case Drain Cork Drain Hose for Pressure Relief Valve Drain Hose...

Page 85: ...mp Outlet Adapter 30022970A System Combi 7 Pressure Gauge 30020258A 8 Air Vent 30023517A 9 Central Heating Supply Water Adapter 20043463A System Regular 20047273A Combi 10 Temperature Sensor 30012907A...

Page 86: ...86 Appendices 13 2 5 DHW Parts 20 11 10 13 14 12 19 23 22 27 21 26 25 28 24 16 17 18 6 7 8 9 15 4 5 2 3 1...

Page 87: ...Return_Pump 30023287A 12 Pipe_Heat Exchanger Inlet 30023513A 13 Clip_STS430 19 2 1t 20007733B 14 Clip_STS430 22 3 1t 20033662A 15 Adaptor_Heating Return_tank 20046875A 16 Packing_Fix Pump 20047567A 1...

Page 88: ...88 Appendices 13 2 6 DHW Block and Heating Supply Assembly 2 3 4 5 1 19 18 12 15 14 17 16 21 20 22 23 24 22 23 25 9 8 7 6 13 11 10...

Page 89: ...tor_DHW_In Outlet 20047162A 9 Temperature Sensor 30015178A 10 O ring_P26 20032409A 11 Clip_ 36 20017724A 12 Heating Water Return 20046493A 13 3 Way Valve XXXXXXXXA 14 Clip_Wire_3 Way Valve 20029414A 1...

Page 90: ...Outlet 20047162A 4 O ring_P26 20032409A 5 Clip_ 36 20017724A 6 O ring_P16 20017210A 7 Clip_D_ 25 20007859A 8 Manifold_Cold Water Inlet 20044471A 9 O ring_P18 20006947A 10 Adapter_Connect 20044469A 11...

Page 91: ...Appendices 91 13 2 8 APS Hose Connection Locations Connect the L Pressure Connect the H Pressure H Pressure L Pressure 1 Description Part Remark 1 Air Pressure Sensor 30022962A...

Page 92: ...Memo...

Page 93: ...Memo...

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Page 96: ...co uk For warranty service always contact an official Technical Assistance Service TAS first Contact the technician or professional who installed your boiler When contacting an official Technical Assi...

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