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Navien NCB-180 Installation & Operation Manual Download Page 8

About the Boiler        7

1.1    Items Included

When you open the box, you will find the following items with the boiler. Check the box for each of the following items before installing the 

boiler.

Installation & Operation Manual, 

User’s Information Manual

Quick Installation Manual

Wall Mounting Bracket

Tapping Screws & Anchors

2 in Vent Termination Caps

2 in Wall Flanges

Pressure Relief Valve, Heating

Flow Restrictors

Conversion Kit

Spare Parts

1.2    Accessories

The following optional accessories are available for the boiler:

Navien Manifold System

Plumb Easy Valve Set  

(Pressure Relief Valve, DHW)

Condensate Neutralizer

Outdoor Temperature 

Sensor with Cable

1.    About the Boiler

Summary of Contents for NCB-180

Page 1: ...ranty service always contact Technical Support first Contact the technician or professional who installed your boiler Contact a licensed professional for the affected system for example a plumber or e...

Page 2: ...O DO IFYOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the ga...

Page 3: ...to secure the services of qualified licensed professionals for the installation of hard wired carbon monoxide detectors a In the event that the side wall horizontally vented gas fueled equipment is i...

Page 4: ...Measuring the Inlet Gas Pressure 34 5 Venting the Boiler 36 5 1 Selecting a Vent Type 36 5 2 Selecting Vent Pipe Materials 40 5 3 Measuring Vent Length 40 5 4 Terminating the Vent 41 6 Setting the DI...

Page 5: ...bor 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 authorized by your gas supplier or the...

Page 6: ...s a clothes line that could obstruct the air flow in or out of the boiler This boiler has been approved for use in the USA and Canada only Using the boiler in any other country will void the manufactu...

Page 7: ...130 F 55 C 10 seconds 120 F 49 C 10 minutes 100 F 37 C very low scald risk DANGER HOT BURN To prevent burns Use the lowest operating temperature setting necessary to provide comfortably hot water If...

Page 8: ...ion Manual Quick Installation Manual Wall Mounting Bracket Tapping Screws Anchors 2 in Vent Termination Caps 2 in Wall Flanges Pressure Relief Valve Heating Flow Restrictors Conversion Kit Spare Parts...

Page 9: ...test procedures 3 The net AHRI water ratings shown are based on a piping and pickup allowance of 1 15 Consult Navien before selecting a boiler for installations having unusual piping and pickup requi...

Page 10: ...ngers Primary Heat Exchanger Stainless Steel Secondary Heat Exchanger Stainless Steel Domestic Water Heat Exchanger Stainless Steel Venting Exhaust 2 in or 3 in PVC CPVC Polypropylene 2 in or 3 in Spe...

Page 11: ...the key components of the boiler Component assembly diagrams and particular parts lists are included in the Appendixes Intake Air Air Filter Mixing Chamber Front Panel Exhaust Flue Duct Ignitor Flame...

Page 12: ...ir Pipe Primary Heat Exchanger Gas Pipe Secondary Heat Exchanger Circulation Pump Flow Sensor Pressure Sensor LWCO 3 Way Valve DHW Inlet Filter with built in flow restrictor Space Heating Supply DHW I...

Page 13: ...Gas Vent 2 in C Space Heating Supply 1 in D Space Heating Return 1 in E Hot Water Outlet DHW 3 4 in F Gas Supply Inlet 3 4 in G Cold Water Inlet DHW 3 4 in H Condensate Outlet 1 2 in I Auto Feeder Inl...

Page 14: ...des probl mes qui peuvent mener la mort causer des blessures graves ou endommager la propri t Consult your installation manual for more information Consultez votre manuel d installation pour plus d i...

Page 15: ...3 3 Connecting the Condensate Drain on page 23 The boiler must be located in an area where leakage of the unit or connections will not result in damage to the area adjacent to the appliance or to low...

Page 16: ...red away from the boiler and that hanging laundry or similar items do not obstruct access to the boiler or its venting High Elevation Installations This boiler may be installed at elevations up to 10...

Page 17: ...eight of the boiler 2 Align the grooves on the back of the boiler with the tongues on the mounting bracket and hang the boiler on the bracket When mounted with the mounting bracket the boiler will hav...

Page 18: ...owed CAUTION Failure to follow the instructions provided in this section will void the warranty and may result in property damage fire serious injury or death 3 Installing the System Piping 3 1 1 Guid...

Page 19: ...ating System Low Water Cut Off LWCO Device Internal LWCO The Navien NCB boiler is equipped with a factory installed pressure sensing type low water cutoff LWCO device The minimum operation pressure fo...

Page 20: ...ll port ball valves are required for the boiler system Failure to use full port ball valves could result in a restricted flow rate through the boiler Check valves are recommended for installation Fail...

Page 21: ...Navien manifold system Space Heating Return Space Heating Supply 3 2 Installing a Domestic Hot Water DHW System The Navien NCB boiler provides domestic hot water continuously when flow is sensed by th...

Page 22: ...nction Flow Restrictor pressure regulator A flow restrictor is used to avoid excessive flow at the faucets The Navien NCB boiler has a built in flow restrictor at the cold water inlet adapter to limit...

Page 23: ...pressure only relief valve WARNING Installing the pressure relief valve improperly may result in property damage personal injury or death Follow all instructions and guidelines when installing the pr...

Page 24: ...ing example for the boiler DHW Supply Cold Water Supply When installing the DHW system follow these guidelines Use only pipes fittings valves and other components such as solder that are approved for...

Page 25: ...e condensate line must have a negative slope to drain properly d From the boiler into a condensate pump and then into a laundry tub Note A pump can be used when there is a long distance between the bo...

Page 26: ...torized feeding valve Therefore installation of additional system water fill connection is not necessary in most cases See the following figure for an example of a water fill installation using the bu...

Page 27: ...bubbler designed to remove the air from the water as it flows through the system 3 5 Testing the Water System WARNING Ensure that the boiler is full of water before firing the burner Operating the un...

Page 28: ...nsionTank The expansion tank must be sized in accordance with the water volume of the system as well as the firing rate of the appliance It is important to locate the expansion tank and make up water...

Page 29: ...stem application drawings are intended to explain the system piping concept only Refer to 3 4 System Fill Connection on page 25 for make up fill connections and refer to the requirements of your local...

Page 30: ...m application drawings are intended to explain the system piping concept only Refer to 3 4 System Fill Connection on page 25 for make up fill connections and refer to the requirements of your local co...

Page 31: ...e up fill connections and refer to the requirements of your local codes to ensure compliance Boiler side piping to the air handler which exceeds the capabilities of the internal boiler circulator requ...

Page 32: ...the first device downstream of the gas meter to ensure a sufficient gas supply The boiler is recommended to be the first appliance to be connected to the gas supply line Gas meter s capacity Total gas...

Page 33: ...ise may occur Corrugated Connector When using flexible gas lines ensure that the pipe s inner diameter and connector is sufficient to supply the required BTUs Also ensure that the flexible line has no...

Page 34: ...080 1 950 1 840 1 630 3 in 11 300 7 780 6 250 5 350 4 740 4 290 3 950 3 670 3 450 3 260 2 890 4 in 23 100 15 900 12 700 10 900 9 660 8 760 8 050 7 490 7 030 6 640 5 890 in Cubic Feet ft3 per Hour 0 6...

Page 35: ...1 570 1 440 4 2 Measuring the Inlet Gas Pressure WARNING The boiler cannot function properly without sufficient inlet gas pressure Measuring the inlet gas pressure should be performed by a licensed pr...

Page 36: ...line will be purged 3 Leave the faucet on until the boiler shuts down due to a lack of gas supply and then turn off the hot water faucet 4 Remove the front cover by loosening the 4 Phillips head screw...

Page 37: ...distances to air intake restrictions are observed Do not store hazardous or flammable substances near the vent termination If this boiler will be installed in areas where snow is known to accumulate...

Page 38: ...nt outlet 3 ft 91 cm J Clearance to nonmechanical air supply inlet to building or the combustion air inlet to any other appliance 36 in 91 cm 12 in 30 cm K Clearance to a mechanical air supply inlet 6...

Page 39: ...g of the heat exchanger and malfunction of the boiler However building codes in most jurisdictions disallow negative pressures in residences In a home with a well balanced air supply the heat exchange...

Page 40: ...ator vent outlet 36 in 91 cm J Clearance to non mechanical air supply inlet to building or the combustion air inlet to any other appliance 36 in 91 cm 48 in 120 cm below or to side of opening 12 in 30...

Page 41: ...65 C In that case you must use Schedule 40 or 80 CPVC or Approved Polypropylene in the USA or Type BH Special Gas Vent Class IIB CPCV or Class IC Polypropylene that conforms to ULC S636 in Canada If y...

Page 42: ...etermine what type of vent termination is appropriate for the installation location and situation The subsections that follow describe some typical venting configurations CAUTION Minimum Clearance to...

Page 43: ...min for Canada Clearance above highest anticipated snow level Maximum of 24 600mm above roof Vent Vent Combustion Air Combustion Air Non concentric Sidewall Venting Air is drawn from a different locat...

Page 44: ...Set of 8 The DIP SW 2 on the circuit board configures additional features at the time of installation such as temperature control modes 1 2 3 4 5 6 ON 1 2 3 4 5 6 7 8 ON Switch Function Setting 1 Tem...

Page 45: ...settings lift the rubber cover to access the front panel DIP switches 1 2 3 4 5 6 7 8 9 10 1 2 ON ON Switch Function Setting 2 Temperature Unit C Celsius 2 ON F Fahrenheit 2 OFF 3 Well Pump On 3 ON Of...

Page 46: ...talled plug Install a power switch between the breaker and the boiler to facilitate end user maintenance and servicing Connect the boiler to a 110 120V AC at 60 Hz with a maximum of 2A The boiler must...

Page 47: ...ments and flammable vapors Is the boiler and vent piping clear of combustible materials including clothing cleaning materials and rags Connecting the Gas Supply Yes No Does the gas supply match the ty...

Page 48: ...elines in this manual Have you ensured that ABS or PVC cellular core pipe has not been used as venting for the boiler Is the vent sloped upward toward the vent termination at a rate of 1 4 in per foot...

Page 49: ...tch 2 set correctly for Celsius ON or Fahrenheit OFF Unless using the well pump is switch 3 set in the down OFF position Is switch 8 set correctly for the installation altitude Front Panel DIP switch...

Page 50: ...settings menu The boiler will retain your settings during a power outage 9 1 Turning the Boiler On or Off To turn the boiler on or off press and hold the Power button for 3 seconds MODE When the power...

Page 51: ...n page 6 carefully Water above 120 F 52 C can cause instant scalding severe burns or death To adjust the water temperature 1 Make sure that all hot water faucets are closed and ensure that the interna...

Page 52: ...to operate at 1 stage MIN MIN 1 5 To set the boiler to operate at DHW 2 stage MAX press the Up button until D MX 2 is displayed 6 To exit the Operation Mode setting and return the boiler to normal ope...

Page 53: ...e heat load type selected 3 Press the Mode button and enter your 4 digit password Use the or buttons to increase or decrease numbers and the Diagnostic button to move between digits 4 When you are don...

Page 54: ...0 F 60 82 C 116 147 F 46 5 63 5 C 3 Cast Iron Baseboard 100 170 F 37 5 76 5 C 86 139 F 30 59 C 4 Low Mass Radiant 80 140 F 26 5 60 C 70 116 F 21 46 5 C 5 High Mass Radiant 80 120 F 26 5 48 5 C 70 101...

Page 55: ...ace heating supply or return temperatures return to within the set ranges Default 3 minutes Setting Range 0 20 minutes Setting the Boost IntervalTime Display Description psi O R S R Boost interval tim...

Page 56: ...tures reach the set values for boiler operation stop temperatures and the burner turns off If the space heating supply or return temperature remains out of the boiler operation temperature range after...

Page 57: ...re range Return Absolute MINTemperature Range Range Remarks 68 F 20 C MAX Set point 18 F 10 C Default 86 F 30 C Setting the Supply Absolute MAXTemperature Display Description psi O R S R Supply absolu...

Page 58: ...eshooting section of this manual or contact Technical Support at 1 800 519 8794 Setting the Automatic Make up Water Feeder Pressure Display Description psi O R S R AWS pressure operation This menu may...

Page 59: ...cessories who is experienced in such work familiar with all precautions required and has complied with all of the requirements of the authority having jurisdiction In Canada The conversion shall be ca...

Page 60: ...as valve where it connects to the pipe See Figure 3 for reference Once the screws are removed carefully separate the pipe from the gas valve 10 Once the gas inlet pipe is detached from the gas valve f...

Page 61: ...itable for natural gas and propane requiring no field adjustment Attempting to alter or measure the gas valve outlet pressure could result in damage to the valve causing potential severe personal inju...

Page 62: ...o comply will cause a gas leak resulting in severe personal injury or death 12 Place the PCB assembly back on to the boiler and tighten the three screws 13 Check the labels carefully and then connect...

Page 63: ...51 Measure the CO2 value at low fire If the CO2 value is not within 0 5 of the value listed in Table 2 the gas valve set screw will need to be adjusted If adjustment is necessary locate the set screw...

Page 64: ...to Max 4 8 mm This unit has been converted to Propane fuel Cet appareil a ete converti au Propane Manifold Gas Pressure Pression la tubulure d alimentation Min 0 02 to Max 0 66 inches WC BTU Input De...

Page 65: ...BK BKBK BKBK BK CN13 B B Inlet1 Thermistor B B B B Outlet2 Thermistor B B B B Inlet2 Thermistor B B B B Outlet1 Thermistor B B B B Exhaust Thermistor B B BK BK High Limit S W CN1 BK R B Valve Solenoid...

Page 66: ...ay 5 Communication Interface UART Communication Interface Ready Link Interface Air Handler FRONT PANEL Ready Link Output MCU 2 Flow Sensor APS Fan Hall Sensor DHW Inlet Thermistor 1 DHW Outlet Thermis...

Page 67: ...66 Appendixes 10 4 Component Assembly Diagrams and Parts Lists 10 4 1 Case Assembly 2 1 4 5 6 7 8 3...

Page 68: ...on Part Remark 1 Intake Air Duct Assembly 30008662B 2 Exhaust Pipe Assembly 30008673A 3 Case 20027375A 4 Intake Air Filter 20007668A 5 Air Pressure Sensor 30010346A 6 PCB 30012262A 7 Front Panel 30012...

Page 69: ...68 Appendixes 10 4 2 Burner Assembly 1 2 9 10 11 11 13 14 21 18 17 4 20 13 19 12 10 16 15 3 6 5 7 8...

Page 70: ...Heat Exchanger Ass y 30012322A NCB 180 30012321A NCB 210 30012317A NCB 240 9 Thermistor Exhaust 30009478A 10 Thermistor Water 30008366A 11 High Limit Switch 30002558A 12 Fastner 20007859A 13 O Ring P1...

Page 71: ...1 32 3 33 30 24 23 19 35 27 35 19 26 25 30 29 6 34 13 22 21 3 20 19 35 31 35 19 18 3 2 1 3 22 Description Part Remark 1 DHW Heat Exchanger 30008181A NCB 180 30005017A NCB 210 240 2 Thermistor 30008366...

Page 72: ...7726A 20 3 Way Outlet Adaptor A 30012331A 21 Packing 20011380A 22 Connection Adaptor 20011408A 23 3 Way Valve 30004816C 24 Fastner 20007733A 25 Water Fill Pipe 30012247A 26 Space Heating Supply Adapto...

Page 73: ...72 Appendixes 10 4 4 Fan Gas Assembly 2 4 7 5 6 11 14 12 11 10 9 13 11 15 1 3 8...

Page 74: ...or 20023861A NCB 180 20019141A NCB 210 240 7 Venturi Packing 20022660A NCB 180 8 Gas Orifice 20024159A NCB 180 NG 20024190A NCB 210 240 NG 20019144A NCB 180 LP 20024189A NCB 210 240 LP 9 O Ring P34 20...

Page 75: ...list the default space heating temperature range by system heat load and the applicable outdoor temperature ranges 10 5 OutdoorTemperature Sensor Optional OutdoorTemperature Sensor Installation 1 Pull...

Page 76: ...Low Mass Radiant 80 140 F 26 5 60 C 70 116 F 21 46 5 C High Mass Radiant 80 120 F 26 5 48 5 C 70 101 F 21 38 C Radiators 120 170 F 48 5 76 5 C 101 139 F 38 59 C Custom Supply Control Absolute MIN MAX...

Page 77: ...Memo...

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