Navien NCB-190/060H Installation & Operation Manual Download

Page: 79 / 145

Installing a Cascade System

If Recirculation Return Line Is Not Installed

Install a NaviCirc valve at the furthest fixture from the water heaters as illustrated below and set the internal

2-way valve on the 1st NPE “A2” unit to the “Ext” position. Refer to the NaviCirc and NPE-A2 Installation Manuals

for additional details. The NCB-H boiler should be set to Combi Pre-heat Mode.

Domestic

Cold

Water

Supply

<NPE-A2>

Ball

Valve

Solenoid

valve

Pressure

Relief Valve

Faucet

Check

Valve

Sub1

<NPE-S2>

Sub2

<NPE-S2>

Sub3

Heating

Supply

Heating

Return

Hydronic

Feed

Water

Expansion

Tank

NaviClean

(Recommended)

Pump

Air Separator with

Expansion Tank

Optional System

Temperature Sensors

Domestic Hot Water Supply

Note

The HotButton mode cannot be used in cascade systems.

Summary of Contents for NCB-190/060H

Page 1: ...ch your gas supplier call the fire department Installation and service must be performed by a qualified installer service agency or the gas supplier The installation must conform with local codes or i...

Page 2: ...located in a crawl space unless the appliance is located in a detached uninhabitable garage For all residential dwellings a carbon monoxide detector must also be present on each habitable level of th...

Page 3: ...titude Conversion 123 12 2 Wiring Diagram 131 12 3 Ladder Diagram 132 12 4 Outdoor Temperature Sensor 133 12 5 Outdoor Reset Control 133 12 6 Component Assembly Diagrams and Parts Lists 135 1 About th...

Page 4: ...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 5: ...USA and Canada only Using the boiler in any other country will void the manufacturer s warranty WARNING Do not store or use gasoline or other flammable liquids near this boiler Doing so may result in...

Page 6: ...burns Use the lowest operating temperature setting necessary to provide comfortably hot water If your household has children or elderly or disabled residents consider using a lower temperature setting...

Page 7: ...emperature Sensor and Cable Spare Parts High Altitude Conversion Kit Natural Gas Only High Altitude Conversion kit and Propane Conversion kit are attached to the inside of Product s case 1 2 Accessori...

Page 8: ...ent of Energy DOE 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...

Page 9: ...irculation Pump Grundfos UPS 15 78 CIAO2 Part Number 30023987A 0 5 10 15 20 25 30 35 40 0 2 4 6 8 10 12 14 16 18 20 0 2 4 6 8 10 12 14 16 FT of Head P psi Flow Rate GPM NFC Flow Performance Curve NCB...

Page 10: ...7 GPM 14 0 L m 4 7 GPM 17 8 L m 4 9 GPM 18 5 L m Gas Connection Size 3 4 in NPT Power Supply Main Supply 120V AC 60Hz Maximum Power Consumption Up to 15 amperes Materials Casing Cold rolled carbon ste...

Page 11: ...ey components of the boiler Component assembly diagrams and particular parts lists are included in the Appendixes Intake Air Ignitor Flame Rod Exhaust Vent Installation Detector Flue Duct Air Vent PCB...

Page 12: ...anger Secondary Heat Exchanger Pressure Sensor LWCO Water Adjust Valve DHW Exchanger Water Fill Valve Heating Return Domestic Cold Pressure Relief Valve Adapter Fan Motor Dual Venturi High Limit Switc...

Page 13: ...r Intake 2 in C Exhaust Gas Vent 2 in D Heating Supply 1 in E Domestic Hot in F Gas Connection in G Domestic Cold in H Auto Feeder Inlet Make up Water in I Condensate Outlet in J Heating Return 1 in O...

Page 14: ...do not install the boiler If conversion to Propane Gas is required the included gas conversion kit must be used Refer to 12 1 Gas High Altitude Conversion on page 123 for details WARNING Ensure that t...

Page 15: ...supply enters the building Gas the installation location should be near where the gas supply enters the building Electricity the installation location should be near where the electrical supply enters...

Page 16: ...is at least 12 in 305 mm above ground 12 in 305 mm above the highest anticipated snow level or as required by local codes whichever is greater Maintain a minimum clearance of 4 ft 1 2 m from heating a...

Page 17: ...the boiler in areas where gasoline or other flammables are used or stored Ensure that combustible materials are stored away from the boiler and that hanging laundry or similar items do not obstruct a...

Page 18: ...on its back or put it inside the protective shipping base Install the boiler in the upright vertical position Installation in any other orientation will result in improper boiler operation and proper...

Page 19: ...e boiler Use one wrench to prevent the connector at the boiler from turning and use the other wrench to tighten the connection Damaged connectors may result in system leaks Properly support the piping...

Page 20: ...ng with 12 30 psi water pressure at the boiler outlet To obtain the minimum system design pressure follow the piping diagrams illustrated in this section The Navien NCB H boiler s space heating system...

Page 21: ...mended for unit serviceability Magnetic Filtration The NaviClean magnetic filter is an optional accessory This must be connected to the space heating return in the near boiler piping to protect the bo...

Page 22: ...nal injury or death Follow all instructions and guidelines when installing the pressure relief valve The valve should be installed only by a licensed professional The pressure relief valve must be ins...

Page 23: ...potential if the DHW temperature is set too high Be sure to follow the adjustment instructions in the boiler s operation manual About the DHW Quality Proper maintenance of the boiler is required when...

Page 24: ...p to 250 mg l Total Dissolved Solids TDS Up to 500 mg l Zinc Up to 5 mg l Navien is not responsible for performance issues of the domestic system by scaling or accumulation of dirt suitable steps shal...

Page 25: ...uidelines Ensure that the valve s discharge capacity is equal to or greater than the maximum pressure rating of the boilers DHW system Ensure that the maximum BTU H rating on the pressure relief valve...

Page 26: ...te drain 1 Connect a drain line to the 1 2 infitting at the bottom of the boiler Use only corrosion resistant material for the drain line such as PVC or CPVC Do not reduce the size of this fitting or...

Page 27: ...the appliance and the neutralizer must be installed to prevent the backflow of condensate into the appliance Make sure to use a proper neutralizer based on the boiler input rating and or the rate of c...

Page 28: ...densate runs freely to the drain Ensure all connections are made to prevent the backflow of condensate Use corrosion resistant piping and secure all piping to prevent movement Note Do not install cond...

Page 29: ...iodically monitor the level of media in the neutralizer and test the pH level at the outlet We recommend an annual pH test using recognized test strips or an electronic pH meter to obtain precise meas...

Page 30: ...p to 250 mg l Copper Up to 1 0 mg l Iron Up to 0 3 mg l Manganese Up to 0 05 mg l pH 6 5 to 8 5 Sulfate Up to 205 mg l Total Dissolved Solids TDS Up to 500 mg l Zinc Up to 5 mg l Chlorine Up to 4 mg l...

Page 31: ...olume of the system as well as the firing rate of the appliance It is important to locate the expansion tank and make up water connection on the inlet side of any pump in the system as doing so will g...

Page 32: ...gravity circulation of the boiler water during the cooling cycle Note The installation of check valves motorized valves or other shutoff appliances other than for the purpose of servicing are not perm...

Page 33: ...tem On the front panel press the Menu button to enter the setting menu and then select 1 2 Zone Settings 2 Zone Settings 3 6 1 Temperature Control Device Applications NCB H series boilers come with a...

Page 34: ...gs are intended to explain the system piping concept only Install a NaviClean filter in the system return to remove foreign objects from the system Foreign objects inside the system may result in abno...

Page 35: ...drawings are intended to explain the system piping concept only Install a NaviClean filter in the system return to remove foreign objects from the system Foreign objects inside the system may result...

Page 36: ...bjects from the system Foreign objects inside the system may result in abnormal system operation Refer to 3 4 Filling the System on page 29 for make up water connections and refer to the requirements...

Page 37: ...ign objects from the system Foreign objects inside the system may result in abnormal system operation Refer to 3 4 Filling the System on page 29 for make up water connections and refer to the requirem...

Page 38: ...L N L N L Z3 Z2 Z1 N A H DHW PRI L N L N L N L N L Z3 Z2 Z1 SUPPLY TEMPERATURE SENSOR RETURN OUTDOOR T S_ZONE3 R W C T S_ZONE2 R W C T S_ZONE1 R W C AC24VN AC24VL lLWCO R W C T S_Recir COM NO NC ZONE_...

Page 39: ...3 Z2 Z1 SUPPLY TEMPERATURE SENSOR RETURN OUTDOOR T S_ZONE3 R W C T S_ZONE2 R W C T S_ZONE1 R W C AC24VN AC24VL lLWCO R W C T S_Recir COM NO NC ZONE_V V3 COM 2 1 Aquastat Recirculation Pump Check Valve...

Page 40: ...re disconnecting them when you work on the controls Wiring errors can cause abnormal and dangerous operation Verify proper operation after servicing Note The installation must comply with National Ele...

Page 41: ..._ZONE2 R W C T S_ZONE1 R W C AC24VN AC24VL lLWCO R W C T S_Recir COM NO NC ZONE_V V3 COM NO NC ZONE_V V2 COM NO NC ZONE_V V1 SUPPLY TEMPERATURE SENSOR RETURN OUTDOOR T S_ZONE3 R W C T S_ZONE2 R W C T...

Page 42: ...ecir COM NO NC ZONE_V V3 COM NO NC ZONE_V V2 COM NO NC ZONE_V V1 Pump Ground SUPPLY TEMPERATURE SENSOR RETURN OUTDOOR T S_ZONE3 R W C T S_ZONE2 R W C T S_ZONE1 R W C 24 VAC N Thermostat Input 24 VAC L...

Page 43: ...W C AC24VN AC24VL lLWCO R W C T S_Recir COM NO NC ZONE_V V3 COM NO NC ZONE_V V2 COM NO NC ZONE_V V1 Thermostat 3 Thermostat 2 Thermostat 1 N A H DHW PRI L N L N L N L N L Z3 Z2 Z1 Zone pump 1 max 2 5...

Page 44: ...Z1 Zone pump 1 max 2 5 A Zone pump 2 max 2 5 A Zone pump 3 max 2 5 A Recirculation pump max 2 5 A Pump Ground Recirculation Timer Aquastat or HotButton Push Button N A H DHW PRI L N L N L N L N L Z3...

Page 45: ...ENSOR RETURN OUTDOOR T S_ZONE3 R W C T S_ZONE2 R W C T S_ZONE1 R W C AC24VN AC24VL lLWCO R W C T S_Recir COM NO NC ZONE_V V3 COM NO NC ZONE_V V2 COM NO NC ZONE_V V1 Thermostat 3 Thermostat 2 Thermosta...

Page 46: ...2 COM NO NC ZONE_V V1 Recirculation Timer Aquastat or HotButton Push Button Zone valve 3 max 0 75 A Zone valve 2 max 0 75 A Zone valve 1 max 0 75 A 24 VAC N Thermostat Input 24 VAC L Thermostat 3 24 V...

Page 47: ...p operation The communication link also provides an optimal control environment for freeze protection SUPPLY TEMPERATURE SENSOR RETURN OUTDOOR T S_ZONE3 R W C T S_ZONE2 R W C T S_ZONE1 R W C AC24VN AC...

Page 48: ...ystem with Zone Valves NCB H SUPPLY TEMPERATURE SENSOR RETURN OUTDOOR T S_ZONE3 R W C T S_ZONE2 R W C T S_ZONE1 R W C AC24VN AC24VL lLWCO R W C T S_Recir COM NO NC ZONE_V V3 COM NO NC ZONE_V V2 COM NO...

Page 49: ...C ZONE_V V1 N A H DHW PRI L N L N L N L N Z2 Z1 Air Handler SUPPLY TEMPERATURE SENSOR RETURN OUTDOOR T S_ZONE3 R W C T S_ZONE2 R W C T S_ZONE1 R W C Connect the pump wires to the system pump NCB H Sys...

Page 50: ...mperature Sensor recommended NCB H Cable tie Note To control the boiler supply or return water temperature using the universal temperature sensor configure the system accordingly On the front panel pr...

Page 51: ...placing the appliance in operation To avoid danger from explosion and fire do not use a flame to check for a gas leak Perform a bubble test on the joints to check for gas leaks If a leak exists bubbl...

Page 52: ...n of a union on the gas supply line close to the boiler to facilitate any future maintenance or service Check with the local jurisdiction to verify whether the use of 1 2 gas pipe is approved in the a...

Page 53: ...gulator Single Regulator System Gas Regulator 12 WC Pipe GasTank Full size Gas Pipe Full size Gas Pipe CAUTION Prior to using an excess flow valve EFV in the gasline checkthemanufacturer sminimumand m...

Page 54: ...230 2 080 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 Ho...

Page 55: ...Gas Pressure WARNING The boiler cannot function properly without sufficient inlet gas pressure Measuring the inlet gas pressure should be performed by a licensed professional only The inlet gas pressu...

Page 56: ...as pressure must fall within the ranges specified on page 8 To measure the inlet gas pressure 1 Shut off the manual gas valve on the gas supply line Gas Valve Opened Closed 2 Turn on the boiler On the...

Page 57: ...e combustion air you MUST Remove contaminants permanently or Relocate air inlet and vent terminations to other clean areas The warranty does not cover damage caused by air contaminants If you must ins...

Page 58: ...leakage which may result in serious injury or death 90 5 1 Venting the Boiler DANGER This appliance is certified as a Category IV appliance and requires a special venting system The vent system will o...

Page 59: ...05 mm above the highest anticipated snow line or as required by local codes whichever is greater Support the vent pipe with hangers at regular intervals or as required by local codes Exhaust and intak...

Page 60: ...nstaller s responsibility to install the vent pipe properly and to adequately secure the unit to the wall The vent pipe must be inserted 3 0 in 76 mm into the boiler collar If the vent pipe is not ful...

Page 61: ...re personal injury and or death Be sure to conduct a visual inspection of the vent pipe before inserting the vent pipe into the boiler collar The portion of the vent pipe inserted into the boiler coll...

Page 62: ...ly to the outside of the building create an airtight seal from the boiler collar to the vent termination Intake materials can be made of ABS PVC CPVC PP galvanized or stainless steel corrugated alumin...

Page 63: ...ly open on a minimum of two sides beneath the floor Clearance in accordance with local installation codes and the requirements of the gas supplier To use non direct venting for the boiler 1 Insert the...

Page 64: ...H NCB 240 110H 199 900 50 in2 10 in W x 5 in H or 8 in round 199 in2 14 1 4 in W x 14 1 4 in H NCB 190 080H 160 000 40 in2 10 in W x 4 in H or 8 in round 160 in2 12 3 4 in W x 12 3 4 in H NCB 190 060H...

Page 65: ...in 30 cm above opening K Clearance to a mechanical air supply inlet 6 ft 1 83 m 36 in 91 cm above if within 10 ft 3 m horizontally L Clearance above paved sidewalk or paved driveway located on public...

Page 66: ...NFPA 54 or CAN CGA B149 1 as well as all applicable local codes and regulations when selecting vent pipe materials Do not use cellular core PVC ASTM F891 cellular core CPVC or Radel polyphenolsulfone...

Page 67: ...vent The use of a tee counts for the same equivalent length as a 90 elbow for the vent size The maximum vent lengths at high altitudes are the same as shown in the table above Hart Cooley Polyflue SW...

Page 68: ...urations but do not include all possible options The following PVC vent terminations are approved for use with this appliance PVC Concentric Vent Kit Sch 40 2 in Vent Kit 3 in Vent Kit IPEX Low Profil...

Page 69: ...mm away from the exhaust termination The exhaust termination can be located either on the sidewall or roof Try to minimize the length of the intake air pipe when installing the vent 12 300mm min 12 30...

Page 70: ...ng 1 25 mm min Combustion Air Combustion Air Maintain 12 300 mm min clearance above highest anticipated snow level or grade whichever is greater Vent Vent Concentric Vertical Venting Combustion Air Ma...

Page 71: ...n a n a 35 ft 3 in 100 ft n a Only the flexible vent models listed above are approved for use with this appliance All flexible vent pipe must be installed VERTICALLY through the roof No horizontal te...

Page 72: ...itch Function Setting 1 2 Operation Status Normal Operation 1 OFF 2 OFF 2 stage MAX 1 ON 2 OFF 1 stage MIN 1 OFF 2 ON 1 stage MAX 1 ON 2 ON 6 2 Dip Switch 2 8 switch unit The DIP SW 2 on the circuit b...

Page 73: ...t 610 m the unit will de rate by 3 for each 1 000 ft 305 m of altitude gain For NG if you install the unit at above 5 400 ft 1 646 m it is required to change the Gas Orifice for high altitude Be caref...

Page 74: ...cilitate end user maintenance and servicing Connect the boiler to a 110 120V AC at 60 Hz with a maximum of 15 A The boiler must be electrically grounded If using the power plug ensure that the electri...

Page 75: ...boilers and water heaters The options shown here are only examples The setup you choose will vary based on the installation location local building codes and other factors Follow all applicable regula...

Page 76: ...page 29 for make up water connections and refer to the requirements of your local codes to ensure compliance Use pumps with integral check valves or install check valves at the pump outlets Adjust the...

Page 77: ...th up to 15 NPE 240A2 or NPE 240S2Water Heaters Model T 54 F Flow rate GPM Water Velocity ft s Pipe Diameter mm in NCB H NPE 240A2 or NPE 240S2 1 1 14 38 5 61 25A 1 in 2 21 57 5 54 30A 11 4 in 3 28 77...

Page 78: ...Return Line Is Installed Connect the domestic hot water return line to the desired number of NPE A2 water heaters Set each unconnected NPE A2 water heater to Internal Recirculation Mode The NCB H boi...

Page 79: ...A2 Installation Manuals for additional details The NCB H boiler should be set to Combi Pre heat Mode Domestic Cold Water Supply NPE A2 Ball Valve Solenoid valve Pressure Relief Valve Faucet Check Valv...

Page 80: ...ing the Communication Cables You can connect one NCB H boiler with up to 15 Navien water heaters NPE A2 or NPE S2 Model using the Ready Link communication cables Select the NCB H series combi boiler i...

Page 81: ...peration To reassign the main NCB H boiler repeat steps 1 5 3 On the sub NPE A2 water heater panel press and hold the OK button for 3 seconds on the sub unit Then the ID 1 Allocated message will appea...

Page 82: ...ly inspect it for punctures cracks or blockages prior to connecting it to the boiler unit Horizontal vent pipe runs must be supported every 4 feet 1 2 m minimum All vertical vent pipe runs must be sup...

Page 83: ...as long as the total allowable vent lengths maximum number of elbows and distances to air intake restrictions are observed If the boiler units will be installed in areas where snow is known to accumu...

Page 84: ...nt systems or unlisted pipes or fittings All plastic components and specified primers and glues of the certified vent system must be from a single system manufacturer and must not be intermixed with a...

Page 85: ...tions An impact may break the bond and harmful gas might leak inside the room Vent Pipe Pitch and Supports For horizontal runs slope the horizontal section upward toward the vent termination at a rate...

Page 86: ...0 71 160 809 700 3 30 53 120 1 009 600 4 96 150 1 209 500 5 80 142 1 409 400 6 68 121 1 609 300 7 60 106 Note Every 90 elbow used is equivalent to 8 linear feet 2 4 m of vent length 9 1 2 Determining...

Page 87: ...tion must conform with the Manufacture d Home Construction and Safety Standard Title 24 CFR Part 3280 Mobile Homes WARNING If the information in these instructions is not followed exactly a fire or ex...

Page 88: ...pter 2 Detach the exhaust vent adapter 3 Connect the Common Vent Collar Kit to the exhaust duct of the boiler unit Maintenance Port Navien Common Vent Collar Kit has a maintenance port to allow you to...

Page 89: ...vent pipe into the vent collar to start the vent run Make sure to completely slide the vent into the collar until the end makes contact with the bottom of the socket Note Verify that 1 1 2 of the pip...

Page 90: ...p solution bubbles will form on the connection if any leaks exist CAUTION Do not start the vent run with a street elbow at the vent collar Using a street elbow directly at the collar will not allow fo...

Page 91: ...trunk pipe to each side of the wye joint or wye assembly Each trunk pipe is connected to the other wye joint or wye assembly Refer to Connecting Pipes with Cement on page 85 for more information DANGE...

Page 92: ...tem Refer to the following figures when setting the common vent type To view and configure the cascade settings press the Back button and the Menu button simultaneously for 3 seconds and then select 4...

Page 93: ...he condensate drain hose prevents condensate or rain from entering the exhaust system and gathering above the Common Vent Collar Kit The exhaust vent must be sloped down towards the drain to prevent w...

Page 94: ...be deformed and the flow will be restricted if the tie is too tight 2 Prime the loop using tap water The water inside the hose should be higher than 7 9 in 200 mm and water should be inside the hose b...

Page 95: ...tuh 3 kW and 50 000 Btuh 15 kW 12 in 30 cm for appliances 50 000 Btuh 15 kW C Clearance to permanently closed window As specified by the manufacturer As specified by the manufacturer D Vertical cleara...

Page 96: ...r veranda porch deck or balcony 12 in 30 cm As specified by the manufacturer The manufacturer shall specify a minimum clearance or state Not applicable in the table and or instructions 1 The minimum d...

Page 97: ...ort check the operating condition of the damper plate inside the Common Vent Collar Kit Damper plate is OPEN Damper plate is CLOSED 3 Reinstall the gasket and maintenance port cover and then fix them...

Page 98: ...piping clear of combustible materials including clothing cleaning materials and rags Connecting the Gas Supply Yes No Does the gas supply match the type specified on the boiler s rating plate Is the...

Page 99: ...e top of the boiler Have you installed a discharge drain tube from the pressure relief valve to within 6 12 in 150 300 mm of the floor Connecting the Condensate Drain Yes No Have you installed a conde...

Page 100: ...tch to facilitate end user maintenance Have you checked the polarity of the electrical connection PCB DIP switch setting DIP SW 2 set of 8 Yes No Gas type Is switch 1 set correctly for LP ON or NG OFF...

Page 101: ...liance if any parts have been under water Immediately call a licensed professional to inspect the appliance and to replace any part of the control system and any gas control which has been under water...

Page 102: ...r and around the boiler for gas odorant or any unusual odor Remove the boiler front door and smell interior of boiler enclosure Do not proceed with startup if there is any indication of a gas leak If...

Page 103: ...heating temperature is highlighted on the screen 11 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 Se...

Page 104: ...e 5 Press the Back button to return to normal operation mode or rotate the Command dial to adjust other operation conditions You can adjust the temperature while the highlighted section is flashing On...

Page 105: ...p Space heating set temperature F 4 DHW Set Temp DHW set temperature F 5 Press the Command dial to confirm the new temperature 6 Press the Back button to return to normal operation mode or rotate the...

Page 106: ...mperature F If AHU is not connected will be displayed The temperature is displayed by 1 degree increments for Fahrenheit and by 0 5 degree increments for Celsius This is due to the degree control spec...

Page 107: ...0 C 36 F 20 C Default 5 F 3 C 3 6 Boost Interval Time Set the boost interval time Setting range 0 120 min Default 0 min 4 Navien Zone Controller Enable or disable heating zones utilizing the Navien Z...

Page 108: ...lling the heating supply water A preset or user defined temperature range is set automatically based on the curve selected Refer to the settings table for details Heat Load Supply Set Point Range Retu...

Page 109: ...ings in the Configuration menu Note If there is a SH Demand signal during combi pre heat the space heating will take priority Press the Back button to return to the previous screen or menu Item Descri...

Page 110: ...tion you must set up the Time setting in the Configuration menu External Recirculation When using the External Recirculation feature you can choose commands in the menu to preheat according to the set...

Page 111: ...5 Viewing Other System Information To view the miscellaneous system information press the Menu button and then select 5 EMS Data Rotate the Command dial to switch between the information items Press t...

Page 112: ...s 11 6 1 Viewing Service Information To view service information about the boiler press the Back button and the Menu button simultaneously for 3 seconds and then select 1 Service Status Info Press the...

Page 113: ...tus 17 LWCO Input Status LWCO input status 18 Air Handler Interface Output Status Air Handler Interface output status Rotate the Command dial to switch between the information items Press the Command...

Page 114: ...erature range to turn on space heating Setting range 2 F 1 C 54 F 30 C Default 5 F 3 C 7 SH Min Limit Set space heating minimum heat capacity limit Setting range Space heating Min capacity space heati...

Page 115: ...the approximate distance to the furthest fixture to virtually turn off recirculation when the HotButton mode is used Setting range 15 ft 4 5 m 660 ft 198 m 5 ft 1 5 m intervals Default 30 ft 9 m Item...

Page 116: ...service notification Setting range 30 3650 days 10 years It can be set in 10 day increments Default 1820 days 5 years 24 Gas Connect Error Check Enable Enable or disable the gas connection error dete...

Page 117: ...setting mode select Start The setting mode is entered and the IDs of all boilers that can communicate with the Main via the RS485 communication line are initialized The boilers whose IDs are initiali...

Page 118: ...ch between the parameters or to increase decrease setting values Press the Command dial to select a parameter or to confirm after making changes Press the Back button to return to the previous screen...

Page 119: ...Test the zone 2 pump operation The zone 2 pump is turned on as soon as you enter the test mode Press the Command dial to toggle the pump operation On Off Off On This option is available only when the...

Page 120: ...k button and the Menu button simultaneously for 3 seconds and then select 7 Special Operations Rotate the Command dial to switch between the operation modes Press the Command dial to select an operati...

Page 121: ...ust thermostat Contact technical support at 1 800 519 8794 E060 Abnormal operation dual venturi Contact technical support at 1 800 519 8794 E109 Abnormal operation fan motor Clean the intake air filte...

Page 122: ...ture sensor appears only when the outdoor reset curve is enabled Ensure that the outdoor reset curve is configured properly Check the outdoor temperature sensor wiring connection E761 Abnormal operati...

Page 123: ...information in these instructions must be followed to minimize the risk of fire or explosion or to prevent property damage personal injury or death The qualified service agency is responsible for the...

Page 124: ...cation GasType NG LP Altitude 0 5 399 ft 5 400 10 100 ft 0 10 100 ft Orifice GAS NG 20049500A 4 50 6 30 GAS NG 20051240A 4 65 6 50 GAS LP 20050545A 3 65 4 95 Factory Installed For High altitude For LP...

Page 125: ...et pipe and the gas valve in the middle of the unit as shown in Figure 2 Gas Valve Gas Inlet Pipe Figure 2 NCB H Series Internal Components 5 Use a Phillips screwdriver to remove the two screws at loc...

Page 126: ...alve inlet adapter whenever they are disassembled The O ring must be in good condition and must be installed Failure to comply will cause a gas leak resulting in severe personal injury or death WARNIN...

Page 127: ...e the Gas Orifice for high altitude when the boiler is installed at above 5 400 ft and be careful not to confuse it with the Gas Orifice for LP For High Altitude conversion check the DIP switches sett...

Page 128: ...he CO2 value Figure 8 Set Screw Location Note The set screw is located behind the screw on cover This must be removed first 12 Measure and adjust the gas air ratio Option 1 Using Combustion Analyzer r...

Page 129: ...et value is out of range the gas valve set screw will need to be adjusted If adjustment is necessary locate the set screw as shown in Figure 10 Using a 5 32 in or 4mm Allen wrench turn the set screw n...

Page 130: ...ls adjacent to the rating plate as shown in Figure 11 with Kit No ________________________ This boiler was converted on name and address of organization making this conversion who accepts responsibili...

Page 131: ...TRICAL SHOCK HAZARD before making any electrical connections to avoid possible electric hazard Failure to do so can cause severe personal injury or death Pumps must be electrically grounded as require...

Page 132: ...1 10A 10A 10A ZONE1 Pump Relay 3 ZONE3 Pump Relay 2 ZONE2 Pump WD PSS Heating Return Thermistor System Return Thermistor INLET Thermistor System Supply Thermistor Outdoor Thermistor 1 2 3 4 5 6 O N O...

Page 133: ...front panel displays a fault 12 4 OutdoorTemperature Sensor OutdoorTemperature Sensor Installation 1 Pull out the sensor body from the cap 2 Attach the body to the wall using the screws anchors provi...

Page 134: ...rature ranges OutdoorTemperature Sensor Installation Guidelines Heat Load Supply Set Point Range Return Set Point Range Finned Tube Baseboard default 120 180 F 48 5 82 C 101 147 F 38 63 5 C Fan Coil 1...

Page 135: ...135 Appendixes 12 6 Component Assembly Diagrams and Parts Lists 12 6 1 Case Assembly 16 6 20 19 18 4 5 12 1 3 7 17 14 10 9 8 5 11 2 13 15...

Page 136: ...erminal PCB 30019951A 8 Intake Air Duct Assembly 30008662B 9 Intake Air Filter 30016248B 10 APS 30021100A 11 Air Vent Adapter 20051293A 12 Rubber Ring 20041970A 13 Exhaust Duct Assembly 30024848A 14 2...

Page 137: ...137 Appendixes 12 6 2 Burner Assembly 12 13 10 20 21 11 7 3 1 2 5 24 6 9 23 22 8 14 19 16 17 10 15 18 4...

Page 138: ...9 Thermistor Exhaust 30009478A 10 Thermistor Water 30008366A 11 High Limit Switch 30023954A 12 Fastener Heat 20033662A 13 Heat Exchanger Outlet Pipe 30024902A NCB 190 080H 30024903A NCB 250 150H 14 L...

Page 139: ...0044471A 3 Cap 20017744A 4 Mixing Connector 20044469A 5 Flow Adjust Valve 30008247A 6 DHW Inlet Connection Adapter 20044470A 7 Taptite Screw 4 6 20017962A 8 DHW Temperature Sensor Blue 30022207B 9 DHW...

Page 140: ...HW Outlet Adapter 20044487B 34 DHW Connection Elbow 20025962B 35 DHW Temperature Sensor Black 30022222B 36 3way Valve Body 20046493B 37 Heating Supply Adapter 20044489A 38 3Way Valve Fastener 20029414...

Page 141: ...141 Appendixes 12 6 4 Fan Gas Assembly 10 9 12 8 7 3 1 2 4 5 6 13 11 11 14 15...

Page 142: ...H 6 Silence Adapter 20049499A NCB 190 080H 20032569A NCB 250 150H 7 Venturi Packing 20022660A 8 Gas Ofifice 20049500A NCB 190 080H NG 20049501A NCB 250 150H NG 20050545A NCB 190 080H LP 20050546A NCB...

Page 143: ...Memo...

Page 144: ......

Page 145: ...ct a licensed professional for the affected system for example a plumber or electrician When you contact Technical Support please have the following information at hand Model number Serial number Date...

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