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About the Water Heater

2.5 Components

The following diagram shows the key components of the water heater. Component assembly diagrams and

particular parts lists are included in the Appendixes.

Intake Air/Exhaust Duct

Condensate Drain

Stainless Steel Heat

Exchanger

Fan Motor

Gas Valve

Water

Adjustment Valve

NaviTech

Burner

Front Panel
PCB

Gas Inlet Fitting

Water Inlet Filter

Ignition Transformer

APS (Air Pressure Sensor)

Recirculation Pump

Buffer Tank

DHW Supply Fitting

Recirculation Inlet

Adapter

[NHW700-160AI/180AI/199AI]

For Indoor Use Only

Содержание NHW700

Страница 1: ...y licensed professional to contactTechnical Support at 1 800 519 8794 Option 2 once at the installation site A short list of independent service providers in your area can be found on the website www...

Страница 2: ...vapors and liquids in the vicinity of this or any other appliance WHATTO 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...

Страница 3: ...n Installation Location 14 3 2 Mounting the Water Heater to the Wall 18 3 3 Connecting the Gas Supply 19 3 4 Connecting the Water Supply 25 3 5 Venting the Water Heater Indoor Models Only 34 3 6 Conne...

Страница 4: ...E Indicates information considered important but not hazard related such as property damage DANGER If you smell gas Do not try to light any appliance Do not touch any electrical switches or use landli...

Страница 5: ...water heater has been approved for use in the USA only Using the water heater in any other country will void the manufacturer s warranty WARNING To prevent death serious injury or property damage Do...

Страница 6: ...F 52 C can cause severe burns instantly or death from scalds Children disabled and elderly are at highest risk of being scalded Feel water with your elbow before bathing or showering Temperature limi...

Страница 7: ...Remote Controller outdoor models only 2 2 Accessories The following optional accessories are available for the water heater Remote Controller Navien Plumb Easy Valve Set with Pressure Relief Valve Rea...

Страница 8: ...65 lbs 29 kg InstallationType IndoorWall Hung Only OutdoorWall Hung Only VentingType Forced Draft DirectVent Indoor only Ignition Electronic Ignition Water Pressure 15 150 PSI Natural Gas Supply Pres...

Страница 9: ...aintenance a b c d e f g h i j k a f h c i d j e k For indoor models For outdoor models a Error g Master Unit A code will appear on the display Cascade operation b Hot Water Recirculation h Display Re...

Страница 10: ...d in the Appendixes Intake Air Exhaust Duct Condensate Drain Stainless Steel Heat Exchanger Fan Motor Gas Valve Water Adjustment Valve NaviTechTM Burner Front Panel PCB Gas Inlet Fitting Water Inlet F...

Страница 11: ...TechTM Burner Fan Motor Front Panel Gas Valve Water Adjustment Valve PCB Gas Inlet Fitting Water Inlet Filter Ignition Transformer Buffer Tank APS Air Pressure Sensor Recirculation Pump DHW Supply Fit...

Страница 12: ...nsate Drain 5 8 in D Hot Water Outlet 3 4 in E Return Inlet 3 4 in F Gas Inlet 3 4 in G Cold Water Inlet 3 4 in OverheadView A B C 4 6 in 117 7 mm 8 6 in 220 mm 8 6 in 220 mm 0 6 in 16 mm Supply Conne...

Страница 13: ...in C Gas Inlet 3 4 in D Cold Water Inlet 3 4 in OverheadView 4 4 in 112 mm 0 6 in 16 mm Supply Connections A D C B 10 3 in 263 5 mm 4 4 in 112 3 mm 4 4 in 112 3 mm 3 9 in 99 8 mm 3 9 in 99 8 mm 1 2 i...

Страница 14: ...ter heater matches the gas type gas pressure water pressure and electrical supply available in the installation location Ifthewaterheaterdoesnotmatcheachoftheseratings donotinstallthewaterheater Using...

Страница 15: ...ulfate Up to 250 mg l Total Dissolved Solids TDS Up to 500 mg l Zinc Up to 5 mg l Chlorine Up to 4 mg l If your local water is hard please review the following recommended treatment and flushing guide...

Страница 16: ...e domestic water 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 electri...

Страница 17: ...water heater where moisture from the exhaust may discolor or damage walls Avoid installing the water heater in bedrooms or any other occupied rooms that are normally kept closed or that are not adequ...

Страница 18: ...exposure to the corrosive atmosphere Damage due to a corrosive environment is not covered under warranty OperatingTemperature The ambient temperature at the installation location must be above freezin...

Страница 19: ...ot properly and securely attached to the wall it could become dislodged causing the exhaust vent pipe to separate This can result in carbon monoxide emissions which could cause severe personal injury...

Страница 20: ...er heater cannot be converted from natural gas to propane or vice versa without a Navien gas conversion kit Do not attempt a field conversion of this water heater without a Navien gas conversion kit i...

Страница 21: ...or gas leaks Union Gas Shutoff Valve Gas Supply Gas Inlet Adapter BottomView Full Size Gas Pipe Navien recommends connecting the water heater as the first water heater downstream of the gas meter to e...

Страница 22: ...in 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 crimps or tight bends in it as...

Страница 23: ...532 2 in 4 020 2 760 2 220 1 900 1 680 1 520 1 400 1 300 1 220 1 160 1 020 2 1 2 in 6 400 4 400 3 530 3 020 2 680 2 430 2 230 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...

Страница 24: ...ing system during any pressure testing of that system at test pressures in excess of 1 2 psi 3 5 kPa The appliance must be isolated from the gas supply piping system by closing its individual manual s...

Страница 25: ...er heater reaches its maximum firing rate check the inlet gas pressure reading on the manometer The gas pressure must fall within the ranges specified on page 23 2 Open a hot water faucet The water he...

Страница 26: ...proved for use in potable water systems Tighten the water heater connection valves with care to avoid damage We recommend using unions and manual shut off valves on the cold water inlet and DHW outlet...

Страница 27: ...increases because the water heater operates to maintain the water temperature within the circulation loop You can use the Navien Intelligent Preheating feature set the weekly timer or activate the Hot...

Страница 28: ...ply Circulation Pump Water Adjustment Valve 2 Way Valve Closed Check Valve The following diagram shows the internal recirculation flow for pre heating Internal Recirculation Mode Primary Heat Exchange...

Страница 29: ...ypassValve Enable Activate for use with NaviCirc recirculation valve 3 4 2 Using the Water Heater for Combination Water Heating and Space Heating When using the water heater for both water potable hea...

Страница 30: ...ting not available Cascade Pump Cycle IntervalTime Settings Mode P 12 1 When the P 12 item is displayed on the PARAMETER INFORMATION MENU MODE segment press the Info button once to enter the Preheat P...

Страница 31: ...ater It adds signal input functions to the water heater for more efficient DHW hot water recirculation functionality With the HotButton kit DHW recirculation is carried out exactly when the actual dem...

Страница 32: ...ulation device for standard domestic hot water lines without a recirculation system It allows domestic hot water lines and domestic cold water lines to connect to the NaviCirc and preheat hot water li...

Страница 33: ...nsor are not included with the water heater but they are available for purchase When the optional temperature sensor is installed it must be insulated The sensor wire may be extended by up to 100 ft 3...

Страница 34: ...ation Do not plug the relief valve WARNING To avoid potential property damage or personal injury check the pressure relief valve at least once every three years by manually operating the valve to ensu...

Страница 35: ...clean intake air and to ensure that exhaust air is properly removed from living areas The vent system must vent directly to the outside of the building and use outside air for combustion When venting...

Страница 36: ...f tapping screws are used to secure the pipes together as well as the pipes to the water heater Failure to do so may result in the pipes being loose and thereby cause property damage personal injury o...

Страница 37: ...n 34 mm into the water heater exhaust collar If the vent pipe is not fully inserted the vent installation detector switch may not detect its presence and the water heater may not operate 3 5 1 About t...

Страница 38: ...ormity of the vent pipe not using a correctly sized vent pipe misalignment of the ventpipeintothecollar verticalmovementof theventpipecausedbyimproperinstallation and other misuse or non conformance w...

Страница 39: ...tal distance of 2 ft 61 cm from the center line of the terminal 3 ft 91 cm E Clearance to unventilated soffit 3 ft 91 cm F Clearance to outside corner 2 ft 61 cm G Clearance to inside corner 12 in 30...

Страница 40: ...H Clearance to each side of center line extended above meter regulator assembly 3 ft 91 cm within a height of 15 ft 4 6 m I Clearance to service regulator vent outlet 3 ft 91 cm J Clearance to nonmec...

Страница 41: ...least 12 in 30 cm away from the inside corner of a wall If the adjacent wall is less than 12 in 30 cm in length the minimum required distance away from the inside corner will be equal to the length of...

Страница 42: ...90 Elbows Maximum Vent Length Concentric 3 in 5 in 80 mm 125 mm 0 20 ft 6 m 1 15 ft 4 5 m 2 10 ft 3 0 m 3 5 ft 1 5 m Note The Maximum Vertical and Horizontal Total Vent Length does not include any elb...

Страница 43: ...C 884954220987 Includes One Sidewall Termination One 90 Elbow TwoWall Plates ConcentricSidewallTerminationKit VentPipeExtension ReplacementGasket BlueSilicone Black EPDM Navien Part GXXX001898 Navien...

Страница 44: ...of Terminationwithout CondensateCollector Example of Termination with Condensate Collector Metal Fab Inc Alternate Certified Vent Components Certified to UL1738 Note Refer to the contact information o...

Страница 45: ...he hose should be higher than 5 1 in 130 mm and water should be inside the hose before operating the water heater Do not remove the condensate collector cap unless a condensate trap is attached If a c...

Страница 46: ...us injury or death ALWAYS follow all applicable electrical codes of the local authority having jurisdiction In the absence of such requirements follow the latest edition of the National Electrical Cod...

Страница 47: ...d 1 Completely drain the water out of the water heater 2 Disconnect the power supply to the water heater This prevents your water heater from freezing and being damaged WARNING Electric Shock Hazard T...

Страница 48: ...n display well pump storage tank solar system lime alarm high altitude cascade venting and gas type settings Some of these configurations are set at the factory and should not be changed The following...

Страница 49: ...OFF 6 DHW Storage Tank Storage Tank Operation 6 ON Do Not Use Storage Tank 6 OFF 7 Commercial Lock Temperature can be set 7 OFF Temperature cannot be set 7 ON 8 Limescale Detection Alarm Disable the l...

Страница 50: ...of the extension cable to the cable connected to the remote controller Note You can connect up to 2 remote controllers if necessary Optional Connect the wiring from the second remote in parallel with...

Страница 51: ...r settings Recirculation ON Up button Increase the temperature or value Down button Decrease the temperature or value Lock button Locks the other button operations Power button Turns the remote contro...

Страница 52: ...nitially Setting the Multi Remote Controller System If you turn on the water heater with the front panel connected to two remote controllers one of the controllers is set to the main controller random...

Страница 53: ...multi remote controllers Press the Preheat Timer button and Lock button simultaneously for 2 seconds on any of the controllers After initializing the setting repeat the instructions from the 4 5 1 In...

Страница 54: ...tering Lock Mode To prevent accidental pressing of the buttons and to prevent children from adjusting the controller you can activate the Temperature Lock Mode To activate or deactivate Lock Mode pres...

Страница 55: ...n time by pressing the Up or Down button or 4 Press the OK button to save the timer setting Repeat these procedures for Reservation Schedule Settings 2 and 3 4 Press the OK button to finish and save t...

Страница 56: ...on area starts flashing 4 9 Starting Recirculation Press the Preheat Timer button to start recirculation immediately regardless of the reservation schedule HEAT appears for 4 seconds on the display an...

Страница 57: ...Connecting Water Supplies Several options are available for plumbing a cascade system of water heaters The options shown here are only examples The setup you choose will vary based on the installation...

Страница 58: ...on setup on the Main water heater press and hold the Diagnostic and Reset buttons for more than 5 seconds The water heater will revert to independent operation Repeat steps 1 3 to reassign the Main wa...

Страница 59: ...with Front Cover Cap for NSF 5 Use Only After installing the water heater completely cover the indicated clamps with the front cover caps provided with the product Note The front cover caps must be u...

Страница 60: ...1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0 13 0 0 30 60 90 120 150 Flow GPM T Temperature Rise NHW700 180AE 180AI 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0 13 0 0 30 60 90 120 150...

Страница 61: ...700 160AE 160AI 0 5 10 15 20 25 30 35 40 45 50 0 1 2 3 4 5 6 7 8 9 10 11 Pressure Loss Psi Water Flow GPM NHW700 180AE 180AI 0 5 10 15 20 25 30 35 40 45 50 0 1 2 3 4 5 6 7 8 9 10 11 Pressure Loss Psi...

Страница 62: ...h or Flow sensor DHW Inlet1 Temp Sensor DHW Outlet2 Temp Sensor DHW Outlet1 Temp Sensor Antifreeze Temp Sensor GROUND P E 1 PIN2 M MIXING V V 1 CON5 1 CON3 M WAV V V Vent separation Detect CN18 1 CON1...

Страница 63: ...12 V Fan Hall Sensor FAN Water Adjustment Valve Flow Control DC 15 V Water Leakage Detection Outlet Thermistor 1 Outlet Thermistor 2 Inlet Thermistor 1 Modulation GV HTL switch Heat Exchanger UART Co...

Страница 64: ...63 Appendixes 6 5 Component Assembly Diagrams and Parts Lists 6 5 1 Case Assembly NHW700 160AI 180AI 199AI 20 14 22 23 24 6 5 10 1 8 9 18 13 16 21 11 12 19 25 15 2 17 4 3 7...

Страница 65: ...29845 11 PCB 30029812 30030165 12 Exhaust Gasket 30022669 20047330 13 Exhaust Rubber Packing 30022669 20046640 14 Intake Exhaust Pipe 30022669 20052298 15 Exhaust Rubber Packing 30022669 20046640 16 I...

Страница 66: ...65 Appendixes 6 5 2 Case Assembly NHW700 160AE 180AE 199AE 15 9 6 5 11 1 8 10 17 12 13 16 2 18 4 7 14 3...

Страница 67: ...e Toggle Latch 20007514 6 Rubber Ring 20006973 7 20025127 8 20029318 9 Junction Box 20046065 10 Air Pressure Sensor 30010238 30010238 11 Gas Control Valve 30029811 30029845 12 PCB 30029813 30030165 13...

Страница 68: ...3 37 43 33 Description Service Part Part Remark 1 Chamber Case 160AI 30030641 180 199AI 30030643 30029843 160AI 30029844 180AI 199AI 2 Pressure Test Nipple 20048333 3 Case Support Bracket Lower 200576...

Страница 69: ...30030136 160AI 30030135 180AI 199AI 20 Tube 20010120 21 Heat Exchanger Back Up Ring 20021730 22 Heat Exchanger O Ring 20017211 23 NaviTech Stainless Steel Burner 30031314 160AI 30031315 180AI 199AI 2...

Страница 70: ...let Temperature Sensor 30030645 30008366 36 Inlet Pipe 30029798 37 Clip 30030645 20045992 38 Heat Exchanger Outlet Adapter 30029802 39 Outlet Temperature Sensor 30030645 30015178 40 Outlet Pipe 300298...

Страница 71: ...18 34 33 31 32 3 23 46 Description Service Part Part Remark 1 Chamber Case 160AE 30030642 180 199AE 30030644 30029843 160AE 30029844 180AE 199AE 2 Pressure Test Nipple 20048333 3 Case Support Bracket...

Страница 72: ...15 NaviTech Stainless Steel Burner 30031314 160AE 30031315 180AE 199AE 16 Chamber Cover 30022903 160AE 30022831 180AE 199AE 17 Gasket 20047856 160AE 20047857 180AE 199AE 18 20046302 160AE 20045932 18...

Страница 73: ...n Head Bolt 20057401 33 Packing 20018137 34 Gas Stage Valve O Ring 20018012 35 Gas Stage Valve 30004431 36 Ignition Transformer 30030645 30023297 37 Water Flow Sensor 30029799 38 Inlet Temperature Sen...

Страница 74: ...73 Appendixes 6 5 5 Water Assembly 21 15 30 23 24 24 24 24 25 9 6 5 5 11 11 11 1 8 8 8 8 8 8 8 10 29 19 14 14 14 17 17 22 12 12 12 13 13 13 28 28 20 27 26 16 2 18 18 4 3 7...

Страница 75: ...13 Pipe Adapter 20024496 20024496 14 O Ring P16 20017210 20017210 15 Check Valve Adapter 20048412 20048412 16 WAV Outlet Adapter 20048415 20048415 17 O Ring P19 20017211 20017211 18 Water Filter 30008...

Страница 76: ...dust dirt corrosive elements and flammable vapors Is the water heater and vent piping clear of combustible materials including clothing cleaning materials and rags Connecting the Gas Supply Yes No Do...

Страница 77: ...u properly sealed all air intake and exhaust joints from the flue collar to the to the vent termination Have you installed an end cap on the vent pipe Have you checked the venting for leaks Is the ven...

Страница 78: ...o add space heating functionality to the system 6 7 1 Basic Principles The following diagram shows the basic operation of the heater system with the Navien H2Air add on controller NOTICE Do not config...

Страница 79: ...ance is 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 leve...

Страница 80: ...the parts warranty will be reduced to three 3 years and the heat exchanger warranty to three 3 years as indicated in the Warranty Coverage Periods table Navien will pay labor charges for the repair s...

Страница 81: ...licensed to complete the necessary repair The installer and or service provider must comply with Navien s warranty service and return policy procedures as available on Navien s website including cont...

Страница 82: ...OF USE INCONVENIENCE OR LIABILITY ARISING FROM IMPROPER INSTALLATION SERVICE OR USE OF THE PRODUCT ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS ARISING UNDER STATE LAW ARE LIMITED IN DURATIO...

Страница 83: ...Memo...

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