Navien NCB700-2S Plus 42K Installation & Operation Manual Download Page 12

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12 About the Boiler

2.4 Components

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

the Appendices.

Fan & Motor

Front Panel

Flue Duct

Ignitor & Flame Rod

Circulation Pump

Condensate Trap

PCB

NCB700-2S+/42K

Summary of Contents for NCB700-2S Plus 42K

Page 1: ...ire or explosion may result causing property damage or personal injury Do not store or use petrol or other flammable vapours and liquids in the vicinity of this or any other appliance WHATTO DO IFYOU...

Page 2: ...ation 50 6 3 Measuring Flue Length 53 6 4 Terminating the Flue 53 7 Setting the DIP Switches 54 7 1 PCB DIP Switches 54 7 2 Front Panel DIP Switches 54 8 Connecting Electrical Supplies 55 8 1 Accessin...

Page 3: ...bour s phone call your gas provider and follow their instructions If you cannot reach your gas provider call the fire department Do not return to your home until authorised by your gas supplier or the...

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: ...C Very low scald risk CAUTION Do not turn on the boiler unless the water and gas supplies are fully opened Doing so may damage the boiler Do not turn on the water if the cold water supply shut off va...

Page 6: ...taining pressure of up to 3 bar The air vent is required in the system during filling CAUTION The boiler is equipped with an internal bypass valve The internal bypass valve is not intended to replace...

Page 7: ...ts which contains electrical and electronic equipment EEE and batteries and accumulators Because of the potentially hazardous substances that usually accompany EEE improper handling of this type of wa...

Page 8: ...can be dangerous When you no longer wish to use the boiler disable any parts that could be potentially hazardous Installation Operation Manual User s Information Manual Boiler mounting template ErP La...

Page 9: ...water production Heat output adjustment Adjustable over entire Max Min output range Type of heating installation Close circuit Max heating operation pressure bar 2 5 Max heating temperature C 90 Adju...

Page 10: ...w length 45 60 100 m 1 2 Max horizontal coaxial length 80 125 m 68 Max vertical coaxial length 80 125 m 70 Equivalent elbow length 90 80 125 m 2 4 Equivalent elbow length 45 80 125 m 1 2 Equivalent le...

Page 11: ...dby mode PSB kW 0 003 0 003 Other items Standby heat loss Pstby kW 0 089 0 080 Ignition burner power consumption Pign kW 28 26 Annual energy consumption QHE GJ 70 3 71 6 Sound power level indoors LWA...

Page 12: ...llowing diagram shows the key components of the boiler Component assembly diagrams and particular parts lists are included in the Appendices Fan Motor Front Panel Flue Duct Ignitor Flame Rod Circulati...

Page 13: ...Dual Venturi Mixing Chamber Expansion Vessel Primary Heat Exchanger Secondary Heat Exchanger Return Adapter Filter Assembly 3 Way Valve Central Heating Return Pressure Relief Valve Central Heating Sup...

Page 14: ...14 About the Boiler NCB700 3S 54K Fan Motor Front Panel Flue Duct Ignitor Flame Rod Circulation Pump Condensate Trap PCB...

Page 15: ...Dual Venturi Mixing Chamber Expansion Vessel Primary Heat Exchanger Secondary Heat Exchanger Return Adapter Filter Assembly Gas Valve Central Heating Return Pressure Relief Valve Central Heating Suppl...

Page 16: ...440mm Supply Connections Description Diameter A Flue exhaust Air intake 60 100 80 125 B Central heating supply 22 mm C Hot water outlet DHW 15 mm D Gas supply inlet 22 mm E Cold water inlet DHW 15 mm...

Page 17: ...enu and select 2 Central Htg Operation by pressing the OK button 2 In the Central Htg Operation menu select 1 Central Htg ON OFF and select Enable Then select 1 1 CH Set Temp and select a heating temp...

Page 18: ...ating temperature range by k factor setting value and the applicable outdoor temperature range 20 15 10 5 0 10 15 20 25 5 20 30 40 50 60 50 70 80 90 4 3 5 3 2 5 2 1 5 1 2 0 6 1 0 2 Outdoor Temperature...

Page 19: ...f the NCB700 boiler in its final location A detailed description is given of the procedure in the sequenced sections below Wall mounting Gas connection Electrical connections Final check Water and con...

Page 20: ...Circ includes a feature that automatically blocks circulation when the water reaches a temperature of approximately 35 C 2 8 1 Included Items When you open the box you will find the following items wi...

Page 21: ...ling the NaviCirc with the NCB700 boiler activate the Anti Legionella feature on the NCB700 For more information refer to the NCB700 Installation Operation manual Water Pipes Secondary return water pi...

Page 22: ...circulation line which circulates domestic hot water back to the boiler from the furthest fixture is recommended Insulate as much of the hot water supply and recirculation lines as possible For more i...

Page 23: ...chemicals are used Do not install the boiler in areas where petrol or other flammables are used or stored Ensure that combustible materials are stored away from the boiler and that hanging laundry or...

Page 24: ...acket When mounted with the mounting bracket the boiler will have a 16 mm clearance from the back of the wall WARNING The boiler is heavy Always lift the unit with assistance Be careful not to drop th...

Page 25: ...d the underfloor heating component will have to be separated from the central heating appliance by means of a plate exchanger WARNING Tighten the boiler water connections taking care not to damage the...

Page 26: ...e Pipe Hot Water Supply Bottom View DHW Outlet Adapter Condensate Outlet Water Inlet Adapter Condensate Drain Hose Note If the cold water supply pipe is fitted with water meter check valves or loose j...

Page 27: ...upply Expansion Vessel CheckValve AirVent NaviCirc Note Refer to the following before installing the NaviCirc To prevent backflow of water from the hot water return pipe install a check valve on the c...

Page 28: ...the NaviCirc To prevent backflow of water from the hot water return pipe install a check valve on the cold water supply An expansion vessel must be installed and it can be moved depending on the insta...

Page 29: ...nstalling the NaviCirc To prevent backflow of water from the hot water return pipe install a check valve on the cold water supply An expansion vessel must be installed and it can be moved depending on...

Page 30: ...hot water pipe considering the installation location of the NaviCirc as the flexible hose is 500 mm long Adjusting the Flexible Hoses If the water pipes are connected to flexible hoses remove the fle...

Page 31: ...mm X straight adapter provided with the NaviCirc at the end of the pipe Cold Water Hot Water Hot Water Return Note When installing the 15 mm X straight adapter the torque should be around 30 Nm Adjus...

Page 32: ...stainless cap and washer 2 Connect two flexible hoses to the HOT IN and COLD IN RETURN connections 3 Install an air vent on the COLD OUT CLOSED connection Air Vent COLD OUT CLOSED HOT OUT HOT IN COLD...

Page 33: ...onotforcefullysecuretheNaviCirctothewallwithanchors and screws Doing so may damage the NaviCirc CAUTION Attach the bracket to the wall in the following direction If the bracket is attached to the wall...

Page 34: ...ater shutoff valves 2 Open hot and cold water taps 3 Check if there are any leaks around the connected part of the flexible hose and stainless cap Note In case of leaks close the shutoff valves and re...

Page 35: ...must not be longer than 2 m with no more than 2 elbows and must not allow condensation to build up or freezing to occur F The end of the discharge pipe must be fitted so that the discharge outlet is v...

Page 36: ...set at a high temperature The NaviCirc s malfunction Contact Navien Technical Support The water from the tap is too hot The boiler temperature is set too high Adjust the boiler temperature Hot water c...

Page 37: ...nsate Pump Condensate can be removed using a condensate pump of a specification recommended by the pump manufacturer The pump outlet should discharge to a suitable internal foul water discharge point...

Page 38: ...ost vertical route possible to the discharge point with no horizontal sections in which condensate might collect Do not exceed 3 metres outside the dwelling The external pipe should be insulated using...

Page 39: ...k at plug hole 5 Sink or basin with integrated overflow 6 75 mm sink waste trap 75 450 1 7 6 4 2 3 5 Description 1 Boiler 2 Visible air break 3 75 mm trap 4 Soil and vent stack 5 Invert 6 450 mm minim...

Page 40: ...tube and facing away from house 7 Hole depth 400 mm minimum by 300 mm diameter 8 Minimum internal diameter 19 mm fall at least 45 mm per meter 9 Pipe size transition point 10 Minimum internal diameter...

Page 41: ...e dimensions and water pressure are as follows The connection diameter for the domestic cold water inlet must be at least 15 mm If a shut off valve is fitted at the domestic cold water inlet it must h...

Page 42: ...rect pressure will vary with each application 3 If the pressure is lower than the minimum pressure set 1 bar by default error code E302 will appear on the display 4 Fill the boiler with more water unt...

Page 43: ...current Gas Safety Installation and Use Regulations in accordance with BS 6891 However the following recommendations must be complied with at the least Before installing the gas pipes check the type o...

Page 44: ...nsed professional only Natural Gas Connection The gas supply must comply to the current Gas Safety Installation and Use Regulations in accordance with BS 6891 The nominal inlet working gas pressure me...

Page 45: ...measure the inlet gas pressure 1 Shut off the manual gas valve on the gas supply line pipe Gas Valve Opened Closed 2 Open a hot water tap The boiler should turn on and the gas in the gas supply line...

Page 46: ...end of the duct passes through must lead to the outside of the home There must be no hazardous materials or obstructions near the duct If the outlet passes through a wall made of combustible material...

Page 47: ...O From a vertical obstruction 300 P From an openable window 600 Q From an adjacent vertical terminal 600 R From an opening in the car port e g door window into the dwelling 1200 S Below a roof window...

Page 48: ...f air across it at all times A terminal must not be sited below 2 m where people have access to such as public footpaths access routes patios etc However If the terminal is fitted less than 2 m above...

Page 49: ...anagement Kit mm 1 Clearance no less than 200 mm from the lowest point of the balcony or overhang 2 1200 mm from an opening in a car port on the same wall i e door or window leading into dwelling 3 Th...

Page 50: ...d gas removal system must be replaced by a new one For horizontal flue terminal through the wall must be installed horizontal and level The flue pipe inside the terminal is fitted in a 3 to ensure the...

Page 51: ...The use of sand and cement to seal the flue to the fabric opening of the building would secure the flue as required The seals can be put over the securing sand and cement as a decorative weather seal...

Page 52: ...0 45 1 2 90 2 4 80 125 68 45 1 2 90 2 4 6 2 2 Vertical Coaxial Removal Type C33 Standard Removal System 80 125 Max length A 70 m 60 100 Max length A 21 m A A Extended Removal System 80 125 Max length...

Page 53: ...ludes an adapter for connection to the boiler and a removal terminal The total length of the flue must not exceed the maximum value defined If the flue installation includes elbows while calculating t...

Page 54: ...ment 7 1 PCB DIP Switches Dip Switch Set of 8 The DIP SW on the circuit board configures boiler type capacity burner type country and discharge of condensate function 1 2 3 4 5 6 7 8 ON DIP SW Switch...

Page 55: ...t the time of installation Note The NCB700 boiler has an electrical protection degree of IPX5D The electrical connection must be made via a bipolar switch located on the same premises as the boiler Th...

Page 56: ...ether with the seal B 4 Insert all these elements in the cable gland and press on the lid A until the cable is sufficiently fixed in place and the unit is sealed Note The boiler must be connected to t...

Page 57: ...ables our modulating range of OpenTherm room controls to be connected without any further modifications NCB700 OpenTherm Protocol Room Controller 1 2 3 4 5 6 8 3 Connecting the Switched Live 230 V The...

Page 58: ...Navien NCB700 boiler has a dedicated connector for the Navien Smart Room Controller NRC 10R on the back of the front panel terminal connection at the terminal block is not required Simply connect the...

Page 59: ...angeover check the gas inlet pressure Check that the gas circuit is hermetically sealed Check that the control panel is working correctly Check that it functions normally when the boiler is switched o...

Page 60: ...r s schedule programming operation is set f DHW preheat Displayed when the DHW preheat feature is enabled DHW preheat DHW Intelligent DHW preheat Always on DHW preheat Weekly DHW preheat off Eco mode...

Page 61: ...al heating and DHW supply temperatures Refer to the following table for detailed information a b c d e f a Menu button Access to the Main menu screen b Back button Access to the previous screen c OK b...

Page 62: ...panel display after the power is turned on 10 3 Start Up Wizard The setup wizard should run the first time the unit is powered on The wizard must be completed before the boiler can be used 1 Set the t...

Page 63: ...r temperature 1 Make sure that all hot water taps are closed and ensure that the internal circulator and any external circulating pumps are off 2 In normal operation mode press the Up button The DHW t...

Page 64: ...l F W Ver Panel firmware version Note The fan motor controls the APS so the fan target speed Fan Target RPM is only for your reference 10 6 Accessing Basic Menu Items In the Main Menu screen you can v...

Page 65: ...weekdays Saturdays and Sundays 4 OFF NotUsed Disable the schedule function When the boiler is connected to an outdoor temperature sensor optional functioning may be activated according to outdoor tem...

Page 66: ...ionella Activate the Anti Legionella function and schedule The graph shows how the set temperature is determined K factor values can be set using the front panel 20 15 10 5 0 10 15 20 25 5 20 30 40 50...

Page 67: ...1 ECO Preheat OFF Turn off the DHW Preheat 2 ECO Intelligent Set to detect DHW usage for repeat the detected cycle 3 ECO Schedule Set the detect DHW usage for a week 4 Always Preheat Always turn on t...

Page 68: ...s the preheat operation function has been used 6 Gas Consumption View monthly gas consumption 10 6 5 Viewing Error History To view the error history press the Menu button and then select 5 Error Histo...

Page 69: ...Times Number of times a flame loss misfire has occurred 4 2nd ignition No of Times Number of second ignition attempts 5 3rd ignition No of Times Number of third ignition attempts 6 4th ignition No of...

Page 70: ...switch between the parameters or to increase decrease setting values Press the OK button to select a parameter or to confirm after making changes 10 7 2 Viewing Input and Output Status To view the bo...

Page 71: ...ime for service notification Setting range 30 3650 days 10 years It can be set in 10 day increments Default 1820 days 5 years Press the Back button to return to the previous screen or menu Item Descri...

Page 72: ...ice notification according to the operating times Setting range 300 36500 cycles It can be set in 100 cycle increments Default 18200 cycles 20 Low Water Pressure Set the lowest operating pressure of t...

Page 73: ...tral heating maximum operation mode 5 DHW 2nd MAX Set the boiler to run in 2nd stage DHW maximum operation mode 6 2nd MIN Set the boiler to run in 2nd stage minimum operation mode Item Description 3 3...

Page 74: ...ormal operation Water pressure sensor Auto DHW Circulation E407 DHW Outlet thermistor Open or Short Circuit Alarm E421 DHW Inlet thermistor Open or Short Circuit Auto E434 Abnormal operation Flow cont...

Page 75: ...l need to drain either both the central heating side and domestic hot water DHW side or one side only before performing maintenance tasks such as cleaning the adapter filter or to prevent the boiler f...

Page 76: ...s still connected Do not close the gas valve except for routine maintenance as this will limit additional freeze protection If the boiler will not be used for an extended period drain the boiler If th...

Page 77: ...as analyser A full strip down service is recommended at regular intervals or where analyser readings are not within correct safety standards 11 5 1 Interim Service For reasons of safety and economy it...

Page 78: ...cedures given throughout this manual and in component literature shipped with the boiler Failure to perform the service and maintenance could result in damage to the boiler or system Failure to follow...

Page 79: ...the boiler is serviced annually Servicing must be performed by a competent person in accordance with BS 7967 4 After servicing complete the relevant Service Interval Record section of the Benchmark C...

Page 80: ...where gas inlet pipe is attached to the fan motor assembly Loosen the hex nut located above the gas valve and remove the gas pipe Remove 4 screws here Loosen the hex nut here 1 Press the Power button...

Page 81: ...lts connecting the mixing chamber and the heat exchanger and then remove the mixing chamber burner and the chamber bracket 8 Remove the screw connecting the fan motor assembly and the mixing chamber a...

Page 82: ...s are in voids The Flue Gas Analyser should be of the correct type as specified by BS 7967 Prior to its use the flue gas analyser should have been maintained and calibrated as specified by the manufac...

Page 83: ...has been visually checked in accordance with the yellow Prior to CO and combustion ratio check box above before proceeding to the Check CO and combustion ratio at maximum rate stage below SET BOILER...

Page 84: ...te at combustion to stabilise CHECK CO AND COMBUSTION RATIO AT MINIMUM RATE gas sampling point Allow readings to stabilise before recording Is CO less than 350ppm and CO CO2 ratio less than 0 0040 BOI...

Page 85: ...ponsible for the connection utilization repair or servicing of gas utilization equipment or accessories who is experienced in such work familiar with all precautions required and has complied with all...

Page 86: ...the gas valve find location B the connection above the gas valve where it is attached to the fan motor assembly Carefully remove the four screws by hand using a Phillips screwdriver and pull the gas...

Page 87: ...ere personal injury or substantial property damage Navien NCB700 boilers are shipped ready to fire natural gas only Packing Packing Gas Orifice Figure 5 1 Exploded View of Gas Pipe Assembly NCB700 2S...

Page 88: ...1 ON 2 OFF G31 LPG 1 ON 2 ON Table 1 The DIP Switch Setting by Fuel Selection DANGER When conversion is required be sure to set the front panel DIP switches according to the supply gas type Failure t...

Page 89: ...rew on cover This must be removed first Model Gas type G20 G31 20 mbar 37 mbar Output Consumption Gas flow Gas flow Load Kcal h kW kW m3 h m3 h NCB700 2S 42K Max 29 240 34 35 3 33 1 32 Min 2 924 3 4 3...

Page 90: ...PLY_Temp Dip s w 8pin Dip s w 4pin BURNNER HTL M 7 6 5 4 3 2 1 8 MIX V V CN10 OUTLET_Temp 5 4 3 6 2 CN12 M HTL APS INLET_Temp 2 3 4 CN8 1 CN2 M 7 6 5 4 3 2 1 8 WAV V V CN11 P E 1 2 3 4 1 6 7 8 5 1 0 1...

Page 91: ...Valve Flow Control DC15V Vent Separation Detector Supply Thermistor Outlet Thermistor 1 Return Thermistor UART Communication Interface FRONT PANEL Communication Interface FUSE Inlet Thermistor 1 EMI...

Page 92: ...perature sensor is on a North or Northeast side of a structure under eaves where the sensor is shielded from direct sunlight Avoid placing sensor in close proximity of heat sources that may affect cor...

Page 93: ...their responsibility to register with the manufacturer within the allotted time period It is essential that the boiler is serviced in line with the manufacturer s recommendations at least annually Th...

Page 94: ...s complete DHW mode gas rate m3 hr or ft3 hr Central heating output left at factory settings Yes No If no what is the maximum central heating output selected KW Dynamic gas inlet pressure mbar Central...

Page 95: ...service in accordance with the manufacturers instructions and BS 7593 It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to att...

Page 96: ...service in accordance with the manufacturers instructions and BS 7593 It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to att...

Page 97: ...Memo...

Page 98: ...Memo...

Page 99: ......

Page 100: ...rranty service always contact an official Technical Assistance Service TAS first Contact the technician or professional who installed your boiler Contact a Gas Safe Registered engineer When contacting...

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