Navien NPE Installation & Operation Manual
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Navien NPE Installation & Operation Manual

Condensing water heaters
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CLICK ANYWHERE on THIS PAGE to return to NAVIEN WATER HEATER /
HEATING BOILER AGE & MANUALS at InspectApedia.com
Installation & Operation Manual
NPE Condensing Water Heaters
NPE-180A
Model
NPE-210A
NPE-240A
NPE-150S
NPE-180S
NPE-210S
NPE-240S
WARNING
If the information in these instructions is not followed exactly, a fire or explosion may result, causing
property damage, personal injury or death.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance.
What to do if you 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 gas supplier's instructions.
If you cannot reach 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, in the absence of local codes, the National Fuel Gas Code,
ANSIZ223.1/NFPA 54 and/or CSA B149.1, Natural Gas and Propane Installation Code.
When applicable, the installation must conform with the Manufactured Home Construction and Safety
Standard, Title 24 CFR, Part 3280 and/or CAN/CSA Z240 MH Series, Mobile Homes.
Keep this manual near this water heater for future reference
whenever maintenance or service is required.
* The wetted surface of this product contacted by consumable
* Lead Free
water contains less than one quarter of one percent (0.25%) of
lead by weight.

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  • Page 1 CLICK ANYWHERE on THIS PAGE to return to NAVIEN WATER HEATER / HEATING BOILER AGE & MANUALS at InspectApedia.com Installation & Operation Manual NPE Condensing Water Heaters NPE-180A Model NPE-210A NPE-240A NPE-150S NPE-180S NPE-210S NPE-240S Keep this manual near this water heater for future reference whenever maintenance or service is required.

  • Page 2: Table Of Contents

    7.5 Component Assembly Diagrams and Parts Lists 3.3 Connecting the Gas Supply 7.6 Installation Check list 3.4 Connecting the Water Supply 7.7 Navien H2Air Add-on Controller Kit (Optional) 3.5 Connecting the Condensate Drain 7.8 Navien HotButton Kit (Optional) 3.6 Venting the Water Heater 7.9 Requirements for the State of Massachusetts...

  • Page 3: Safety Information

    1. Safety Information The following safety symbols are used in this manual. Read and follow all safety instructions in this manual precisely to avoid DANGER unsafe operating conditions, fire, explosion, property damage, personal injury, or death. DANGER Indicates an imminently hazardous situation which, if not avoided, could result in severe injury or death.
  • Page 4 California law requires the following Prop 65 warning to be provided: WARNING WARNING This product can expose you to chemicals including lead, lead compounds, and carbon bisulfide which are known to the State of California to cause cancer and birth defects or other reproductive harm.
  • Page 5 DANGER DANGER This water heater’s water temperature is set to 120°F (49°C) at the factory for your safety and comfort. Increasing the temperature increases the risk of accidental scalding. Water temperatures at or above 125°F (52°C) can cause instant scalding, severe burns, or death. Before you decide to change the temperature setting, read the following charts carefully.

  • Page 6: About The Water Heater

    Tapping Screws & Anchors 3 in Vent Termination Caps 3 in Wall Flanges 2 in Vent Termination Caps 2 in Wall Flanges External Pump Connector Navien HotButton Kit / H2Air (<150W,1.5A) Add-on Controller Kit Conversion Kit Spare Parts Navi-Link Ready-Link Rack (Wi-Fi Control System 2.2 Accessories...

  • Page 7: Specifications

    2.3 Specifications The following table lists the specifications for the water heater. Additional specifications about water, gas, electric, and air supplies (venting) appear in the Installation section. Item NPE-150S NPE-180(A) NPE-180S NPE-210(A) NPE-210S NPE-240(A) NPE-240S Heat 18,000- Natural Gas 15,000-150,000 BTU/H...
  • Page 8 2.4 The Front Panel The front panel allows you to adjust the water temperature and view the operating status or error codes. Remove the protective sheet from the front panel before using it. Error Master Unit A code will appear on the display Cascade operation Hot Water Recirculation Display...

  • Page 9: Components

    Front Panel Circulation Pump Condensate Trap Gas Valve PCB Box Water Adjustment Valve 2-Way Valve Gas Inlet Fitting Water Inlet Filter Condensate Drain Fitting DHW Supply Fitting Condensate Drain Lid Recirculation Inlet Fitting [NPE-180A/ 210A/ 240A] About the Water Heater...
  • Page 10 Freeze Protection Switch Front Panel APS (Air Pressure Sensor) Condensate Trap PCB Box Gas Valve Flow Sensor Water Adjustment Valve Mixing Valve Gas Inlet Fitting Water Inlet Filter DHW Supply Fitting Condensate Drain Fitting Condensate Drain Lid [NPE-150S] About the Water Heater...
  • Page 11 Freeze Protection Switch Front Panel Condensate Trap Gas Valve PCB Box Flow Sensor Water Adjustment Valve Mixing Valve Gas Inlet Fitting Water Inlet Filter Condensate Drain Fitting DHW Supply Fitting Condensate Drain Lid [NPE-180S/ 210S/ 240S] About the Water Heater...

  • Page 12: Dimensions

    Supply Connections 1.5 in (38 mm) 14.3 in (364 mm) 4.5 in (115 mm) 6.7 in (170 mm) 2.3 in (60 mm) 3.0 in (77 mm) 8.3 in (212 mm) 17.3 in (440 mm) [NPE-180A/ 210A/ 240A] About the Water Heater...
  • Page 13 Condensate Outlet Overhead View Supply Connections 1.5 in (38 mm) 14.3 in (364 mm) 4.5 in (115 mm) 6.7 in (170 mm) 2.3 in (60 mm) 11.3 in (289 mm) 17.3 in (440 mm) [NPE-150S/180S/ 210S/ 240S] About the Water Heater...

  • Page 14: Rating Plate

    à des altitudes de 0 à 4,500 pieds (1,370 m) conformément aux toutes les procédures d’installation à haute altitude CAN/CGA 2.17 à une pression normale. Pour les installations à élévations en haut de 4,500 pieds, appeler le bureau de Navien.

  • Page 15: Installing The Water Heater

    Moderately 4-7 grains/gal Once/Year Water Softener** or Hard (61-120 mg/L) CAUTION Navien PeakFlow is 7-9 grains/gal Recommended Hard (121-160 mg/L) Review all of the installation information in this manual before starting installation. Consider all the requirements for venting, Water Softener** Residential: piping, condensate removal, and wiring.
  • Page 16 Installing the water heater in a location without a drain Do not enclose the vent termination. will void the warranty and Navien will not be responsible for Install the exhaust vent in an area that is free from obstructions water damages that occur as a result.

  • Page 17: Mounting The Water Heater To The Wall

    3.2 Mounting the Water Heater to the Wall Do not install the water heater in areas where dust and debris Navien water heaters come with an upper mounting bracket that may accumulate or where hair sprays, spray detergents, chlorine, is pre-drilled at 16 in on center for easy installation on standard or similar chemicals are used.

  • Page 18: Connecting The Gas Supply

    Navien gas conversion kit. Do not attempt a field conversion of this water heater without a Navien gas conversion kit. Doing so will result in dangerous operating conditions and will void the warranty.
  • Page 19 Navien recommends connecting the water heater as the first water To connect the gas supply: heater downstream of the gas meter, to ensure a sufficient gas 1. Determine the gas type and pressure for the water heater by supply. referring to the rating plate.
  • Page 20 When using rigid pipe, Navien recommends the installation of a union on the gas supply line close to the water heater, to facilitate any future maintenance or service.
  • Page 21 3.3.1 Gas Pipe Sizing Tables (Referenced from 2012 National Fuel Gas Code) These tables are for reference only. Please consult the gas pipe manufacturer for actual pipe capacities. Maximum Natural Gas Delivery Capacity In Cubic Feet (ft ) per Hour (0.60 Specific Gravity; 0.5 in WC Pressure Drop). Contact your gas supplier for BTU/ft3 ratings. Use 1,000 BTU/ft3 for simplified calculations.
  • Page 22 Maximum Liquefied Propane Delivery Capacity In Thousands of BTU/H (0.5 in WC Pressure Drop) Length (including fittings) Pipe Size 10 ft 20 ft 30 ft 40 ft 50 ft 60 ft 80 ft 100 ft 125 ft 150 ft 175 ft 200 ft 250 ft (3 m)

  • Page 23: Connecting The Water Supply

    2. Open a hot water faucet. The water heater should turn on and 8. When the water heater reaches its maximum firing rate, check the gas in the gas supply line will be purged. the inlet gas pressure reading on the manometer. The gas pressure must fall within the ranges specified on page 22.
  • Page 24 The following is a typical water piping example for NPE-180A/ 3.4.1 Using the Water Heater for Combination 210A/ 240A models. Water Heating and Space Heating When using the water heater for both water (potable) heating and space heating, follow these guidelines: Ensure that all piping and components connected the water heater are suitable for potable water applications.
  • Page 25 3. Set the front panel DIP switches at the far left (set of ten) to: 1—ON; 2—OFF. CAUTION Do not remove the front cover unless the power to the water heater is turned off or disconnected. Failure to do so may result in electric shock. Configure only the DIP switches that require adjustment according to the instructions in this manual.
  • Page 26 To use the external recirculation mode: Primary Heat Exchanger 1. Connect the water supply to support recirculation. Refer to the "[NPE-180A/ 210A/ 240A]" diagram on page 24. 2. Set the 2-way valve inside the water heater to “EXT. “ Buffer...
  • Page 27 3.4.3 External Pump Wire Connection 2. Locate the power switch on the right side of the front panel and switch the system off. An external pump may be connected to the water heater for recirculation applications. When selecting a circulator, it shall be sized to maintain a flow of 2-4 GPM through the water heater.
  • Page 28 (see recirculation DIP switch settings below). Condensate Domestic Domestic Cold Water Hot Water 9. Turn on the switch beside the front panel. Domestic Recirculation Return Recirculation Using Two Pumps (Navien Internal Pump & External Pump) Installing the Water Heater...
  • Page 29 3.4.4 Connecting a Pressure Relief Valve When installing the valve, follow these guidelines: Ensure that the discharge capacity of the pressure relief valve is equal to or greater than the maximum pressure rating of the WARNING water heater. Ensure that the maximum BTU/H rating on the pressure relief Improper installation of the pressure relief valve may result valve is equal to or greater than the maximum input BTU/H in property damage, personal injury, or death.

  • Page 30: Connecting The Condensate Drain

    From the water heater directly into an external drain. b. From the water heater, through a neutralizing agent, and then The Navien Condensing Water Heater creates condensation when into an external drain. it operates. This condensation has an acidic pH of 3-5. Follow...
  • Page 31 Do not connect more than one appliance to the neutralizer. If option 'b' is selected for condensate disposal, the Navien condensate neutralizer kit is recommended. The condensate from the appliance flows through the neutralizing media and increases the pH of the condensate.

  • Page 32: Venting The Water Heater

    6.0. For replacement media, contact your local Navien distributor. 3.6 Venting the Water Heater DANGER This appliance is certified as a “Category IV” appliance and requires a special venting system.
  • Page 33 The water heater must be properly vented to ensure a constant Connecting the Pipe to the Vent Collar supply of clean intake air and to ensure that exhaust air is properly Do not use primer or cement on the appliance removed from living areas.
  • Page 34 2. Insert the pipe into the vent collar to start the vent run. Make To avoid moisture and frost build-up and to maintain clearances sure to completely slide the vent into the collar until the end to openings on adjacent homes, 45° elbows, 90° elbows, or tees makes contact with the bottom of the socket.
  • Page 35 3.6.1 Selecting a Vent Type Navien NPE Series water heaters are Category IV appliances and are prepared at the factory to be direct vent (sealed combustion) appliances that draw all of their required combustion air directly from the outdoors. Navien recommends direct air vent installations whenever possible to avoid back drafting cold air through the water heater.
  • Page 36 Description Canadian Direct Vent Installations US Direct Vent Installations Clearance to outside corner Clearance to inside corner 3 ft (91 cm) within a height 15 Clearance to each side of center line extended above ft above the meter/regulator meter/regulator assembly assembly Clearance to service regulator vent outlet 3 ft (91 cm)
  • Page 37 30 in problem, any freezing damage which occurs from back drafting 120 in 10 in (W) x 3 in will not be covered by the Navien warranty. If there is any question NPE-150S 120,000 11 in (W) x (H) or 6 in...
  • Page 38 Canadian Non-Direct Vent US Non-Direct Vent Description Installations Installations Clearance above grade, veranda, porch, deck, or balcony 12 in (30 cm) 12 in (30 cm) 48 in (120 cm) below or to side Clearance to window or door that may be opened 36 in (91 cm) of opening;...
  • Page 39 This water heater has a built-in control to limit the exhaust NFPA 54 or CAN/CGA B149.1, as well as all applicable local codes temperature to 149°F. As a result, the Navien water heater and regulations when selecting vent pipe materials. Do not can be vented with Schedule 40 PVC.
  • Page 40 3.6.3 Measuring Vent Length 3.6.4 Terminating the Vent The maximum vent length when using 2 in exhaust ducts is 60 Before installing the water heater, determine what type of vent ft (18 m). The maximum vent length when using 3 in vent ducts termination is appropriate for the installation location and is 150 ft (45 m).
  • Page 41 The following stainless steel (AL29-4C) vent components can be Indoor Water Heater Installation Venting Examples used as terminations: The following are some possible indoor venting options: Duravent FasNSeal® Two-Pipe Sidewall Venting FSELB9003 (3” 90° Elbow) Intake Air FSELB8803 (3” 88° Elbow) Exhaust Gas FSELB4503 (3”...
  • Page 42 Non-Concentric Sidewall Venting - Air is drawn from a different Low Profile Two-Pipe Sidewall Venting* location that is at least 12 in (300 mm) away from the exhaust termination. The exhaust termination can be located either on Intake Air the sidewall or roof. Try to minimize the length of the intake air (from outdoors) Exhaust pipe when installing the vent.
  • Page 43 No horizontal terminations are permitted. Use a 2 in snap fit coupler or the InnoFlue® Single Wall The Navien Outdoor Vent Kit must be used to ensure proper Residential vent pipes to connect the InnoFlue® Flex 2 in vent operation of the water heater.

  • Page 44: Connecting The Power Supply

    3.7 Connecting the Power Supply If you are not using your water heater for a long period of time: 1. Completely drain the water out of the water heater. WARNING 2. Disconnect the power supply to the water heater. This prevents your water heater from freezing and being damaged.
  • Page 45 Propane. To use the water heater at a specific altitude, the DIP switches should be set as described above. CAUTION Do not configure the system for DHW recirculation when it is configured to run an air handler using the H2Air controller. DHW recirculation and Navien H2Air configurations cannot be used at the same time. 2-switch Panel: Switch...

  • Page 46: Installing A Cascade System

    You can connect up to 16 water heaters to meet high-volume hot water demands. Some possible connection options include the following: Recirculation via Internal Pumps (“A” model only): Union Communication Ball Valve or Navien Plumb Easy Valve Cable Check Valve Faucet...

  • Page 47: Connecting The Communication Cables

    4.2 Connecting the Communication Cables When plumbing a cascade system, consider the following pipe Up to 16 water heaters can be connected with Navien Ready-Link diameters and flow rates. Note that flow rates above 6.6 ft/s may communication cables. Select one of the water heaters in the cause pipe erosion.
  • Page 48 2. On the slave water heater, press and hold the Diagnostics and Down [-] buttons for more than 2 seconds. “SL.01” will appear on the display to confirm that this water heater is set as a slave. 3. Repeat step 2 to configure the rest of the slave water heaters in the system.

  • Page 49: Installing A Common Vent System

    5.1.1 Guidelines for a Common Vent System The Navien Common Vent System* provides an easy way to install the vent system for up to 8 Navien NPE water heater units. By CAUTION sharing the main intake and exhaust vent pipes, effective system...
  • Page 50 0.5” (13 mm) Side 3” (76 mm) Front 4” (100 mm) Navien Modular Conf iguration with Rack System 9” (229 mm) The recommended clearance from the TOP of the unit Note is 36” for servicing the common vent. Additionally, the recommended clearance from the FRONT of the unit is 24”...
  • Page 51 Risk Guidelines Connecting Pipes with Cement Ensure that all common vent system components are manufactured and installed in accordance with valid standards, WARNING regulations, and safety engineering rules. To avoid risk, the common vent system must be installed and Do not mix components from different systems. The vent used only for the original purpose described in this manual.
  • Page 52 W + H] Use solvent type cement only. Check the date of manufacture before using the Vent Length for NPE Water Heater Units cement. Ensure that cement was not manufactured more than 2 years prior to using it. Ensure that the inside of the pipe fitting and the...

  • Page 53: Navien Backflow Damper (Back-Draft Damper)

    The following illustration depicts an example of a common vent exhaust vent while the water heater unit operates. system installed for a cascade system of 8 Navien NPE heater units. By closing the exhaust vent as soon as the combustion cycle ends, the Navien backflow damper retains heat in the system for longer periods.

  • Page 54: Starting The Common Vent System

    Maintenance Port 5.3 Starting the Common Vent System Navien Backflow Damper has a maintenance port to allow you to easily inspect the operating condition of the damper plate. 5.3.1 Backflow Damper Assembly Follow the instructions below to assemble the backflow damper on the NPE water heater units: 1.
  • Page 55 4. Tighten the four mounting screws to secure the backflow 2. Insert the vent pipe into the vent collar to start the vent run. damper in place. The screws (x 4) are supplied with the Make sure to completely slide the vent into the collar until the backflow damper.
  • Page 56 5.3.3 Assembling the T Joint 2. Assemble the tee joint assembly to the vent pipe. Apply solvent cement to the mating surfaces. 1. Use the proper reducers to connect the 2” branch pipe from the unit to the common vent tee joint. Apply the proper solvent cement to the mating surfaces.

  • Page 57: Connecting And Terminating The Vent Pipe

    5.4 Connecting and Terminating the Vent Pipe Refer to the following example to install the common vent system. The installation area should be measured to ensure that sufficient space is available to install the water heater units and the common vent system. Ensure that the common vent system is installed near the water heater units while satisfying all clearance requirements that are specified in this manual as well as the Installation Manuals supplied with the water heater units.

  • Page 58: Installing A Condensate Drain

    5.5 Installing a Condensate Drain To install a condensate drain to the cascade system: 1. Form a loop with a drain hose and fix it with a tie. Refer to the following examples to install a condensate drain hose (field supplied) to the common vent system. The condensate While shaping the hose, do not bend the hose Note drain hose prevents condensate or rain from entering the exhaust...

  • Page 59: Setting Up The Common Vent System

    10-OFF Configure only the DIP switches that require adjustment according to the instructions in this manual. Do not adjust The NPE series water heaters may be installed at Note any other DIP switches. elevations up to 4,500 ft (1,372 m) for use with Natural Gas and Propane.

  • Page 60: Common Vent Termination Clearances

    5.7 Common Vent Termination Clearances 5.7.3 Direct Vent Application – Horizontal Installation 5.7.1 Direct Vent Application – Vertical Installation 36" (91cm) min. Exhaust Intake Exhaust 12" (30cm) min. 12" (30 cm) min. Maximum length 20’ (6 m) Minimum Drain length 36” Intake (91 cm) For more information about the installation of the...

  • Page 61: Exhaust Vent Termination Clearances (For Direct Vent)

    5.8 Exhaust Vent Termination Clearances (For Direct Vent) Description Canadian Direct Vent Installations1 U.S. Direct Vent Installations2 Clearance above grade, veranda, porch, deck, or 12 in (30 cm) 12 in (30 cm) balcony Clearance to window or door that may be opened 12 in (30 cm) 12 in (30 cm) Clearance to permanently closed window...

  • Page 62: Maintenance

    3. Reinstall the gasket and maintenance port cover, and then fix 5.9 Maintenance them with a set screw. Periodically check the damper condition inside the backflow damper through the maintenance port to ensure optimal performance of the system. Follow the instructions to check the damper condition and replace the backflow damper if necessary.

  • Page 63: Operating The Water Heater

    6. Operating the Water Heater 6.2 Adjusting the Water Temperature WARNING Follow the instructions below to avoid unsafe operating WARNING conditions that could cause property damage, severe personal Before adjusting the water temperature, read “To prevent injury, or death. burns:” on page 5 carefully. Water above 120 °F can cause instant scalding, severe burns, or death.

  • Page 64: Viewing Basic Information

    5. To set the water heater to operate at 2-stage MAX (1-stage Commercial Warranty applies when this mode is MAX for NPE-150S), press the Up [+] button 3 times or until used. Refer to the Warranty for more details. “MAX.2 (MAX.1 for NPE-150S)” is displayed.

  • Page 65: Setting The Parameters

    Parameters must be set by a qualified professional with an extensive understanding of the water heating system. Setting With this option activated, the NPE-180A/210A/240A water heater parameters improperly may lead to property damage or injury. monitors the pump operation. When it detects that a pump has not been used for a specific period, it runs the pump for a set duration.
  • Page 66 Outdoor Reset Control (P.07–P.10) Outdoor Low Temperature Set-point (P.07) The Outdoor Reset Control feature can be used to enhance energy Item Description Display efficiency while maintaining optimal heating performance. Outdoor Reset Control automatically changes the space heating Sets the outdoor low temperature setting based on the outdoor temperature and the temperature set-point current space heating system application (system load).
  • Page 67 Heating MAX Set-point (P.10) Preheat Pump Output Time (P.12) Item Description Display Item Description Display Sets the Heating MAX Set- Set the time for the point when outdoor reset 1 - 120 preheating operation or on- is ON (DIP switch #1 ‘OFF’) (Unit: 1 min) demand operation.
  • Page 68 On-Demand Pipe Target Length (P.16) Enable Exhaust Limit Control (P.19) Item Description Display Item Description Display Set the on-demand operation Disable Exhaust Gas Limit 1. OFF according to the desired pipe Control. 15ft (4.5m) - length if on-demand is used & 660ft (198m) external surface temperature Enable Exhaust Gas Limit...
  • Page 69 Cascade External Tank Unit Off Temp Offset (P.23) External Tank Burn Off Temp Offset (P.25) Item Description Display Item Description Display External 0°F (0°C) Tank Burn On Temp External Set the offset value of Burn Offset Set the offset value of Unit Off Tank Burn Off temperature when setting temperature when operating...

  • Page 70: Resetting The Water Heater

    AHU Communication (P.28) Item Description Display Disable AHU Communication. 1. OFF (Default: Off) 2. ON Enable AHU communication. AHU Option Board Connection or Cascade Settings Settings or Cascade Protocol error settings (P.01) NR/NP/NCW Settings. 6.6 Resetting the Water Heater If an error message appears, you can try resetting the water heater to resolve the problem.

  • Page 71: Appendixes

    DANGER Do not perform a gas conversion without an officially approved Included Items: conversion kit and the instructions supplied by Navien. Gas Gas Orifice (refer to below table) conversion using any other parts will result in extremely dangerous burner operation, leading to fire, explosion, severe Water Heater personal injury, or death.
  • Page 72 Valve away from the Fan Assembly to access the Gas Orifice. could result in damage to the valve, causing potential severe personal injury, death or substantial property damage. Navien water heaters are shipped ready to fire natural gas Location B: ONLY.
  • Page 73 Gas Orifice personal injury or death. O-ring NPE-150S NPE-180A/ 210A/ 240A/ 180S/ 210S/ 240S Figure 6. Orifice identification 7. Remove the Gas Orifice, ensure that the packing is properly seated inside the port, and then install the new Gas Orifice for use with LP gas.
  • Page 74 High fire Low fire Water Fuel Heater NPE-150S 10.2 10.8 NPE-180A NPE-180S 10.2 10.8 NPE-210A NPE-210S 10.2 10.8 DANGER NPE-240A When conversion is required, be sure to set the front panel NPE-240S 10.2 10.8 DIP switches according to the supply gas type.
  • Page 75 Gas Type Offset death or substantial property damage. NAC-N6 -0.03 in ± 0.01 in NPE-150S NAC-L6 -0.04 in ± 0.01 in 12. Once the CO or offset values have been confirmed, apply the included conversion stickers to show that the appliance has NAC-01 -0.03 in ±...

  • Page 76: Technical Data

    7.2 Technical Data Pressure Drop Curve [NPE-240A/ 240S] [NPE-210A/ 210S] [NPE-180A/ 180S] [NPE-150S] Appendixes...
  • Page 77 Outlet Flow Data [NPE-240A] [NPE-210A] [NPE-180A] At altitudes above 2,000 ft (610m), the outlet flow will be reduced by 4% for each 1,000 ft (305 m) of altitude gain. Note Appendixes...
  • Page 78 Outlet Flow Data [NPE-240S] [NPE-210S] [NPE-180S] [NPE-150S] At altitudes above 2,000 ft (610m), the outlet flow will be reduced by 4% for each 1,000 ft (305 m) of altitude gain. Note Appendixes...

  • Page 79: Wiring Diagram

    7.3 Wiring Diagram [NPE-180A/ 210A/ 240A] Appendixes...
  • Page 80 [NPE-150S/180S/ 210S/ 240S] Appendixes...

  • Page 81: Ladder Diagram

    Relay 3 Outlet MCU 1 MGV1 MCU 2 Thermistor 2 MGV2 Inlet Relay 1 Thermistor 1 Relay 2 Inlet Relay 4 Thermistor 2 Exhaust Thermistor Communication Interface UART FRONT Communication PANEL Interface Ready Link Ready Link Interface [NPE-180A/ 210A/ 240A] Appendixes...
  • Page 82 NEUTRAL EXT_PUMP Relay 1 FILTER * NPE-180S/ 210S/ 240S only VENTURI Relay 2 Relay 3 IGNITER Relay 4 PUMP Primary Primary SMPS Speed Control DC15V Secondary DC24V DC12V 200V FSA Power DC5V Switch Water Mixing Water Adjust Valve Valve Flame Rod Flow Sensor H.T.L...

  • Page 83: Component Assembly Diagrams And Parts Lists

    7.5 Component Assembly Diagrams and Parts Lists 7.5.1 Case Assembly Appendixes...
  • Page 84 Description Part # Remark Intake Air Duct Assembly 30008662B Intake Air Filter 30016248B 20019078D NPE-180A/210A/240A Case 20026559C NPE-150S/180S/210S/240S Air Pressure Sensor 30015811A Panel Bracket 20018388A 30011282A NPE-180A/210A/240A Cover 30015929A NPE-150S/180S/210S/240S Case Lower Bracket 20007643B 30008300C NPE-180A/210A/240A 30011690D NPE-150S/180S/210S/240S Power Switch...
  • Page 85 7.5.2 Burner Assembly (NPE-180A/ 210A/ 240A) 11-1 Appendixes...
  • Page 86 Description Part # Remark 30009189A NPE-180A Heat Exchanger Assembly 30010812A NPE-210A/240A Fan Packing 20022744A Fan Bracket (F) 20022095A Flow Sensor Assembly 30008571A Thermistor 30008366A Fan Bracket (R) 20022096A 30009166D NPE-180A Cold Inlet Pipe 30010805D NPE-210A/240A O-Ring (Φ17.5x2.7t) 20006947A WPA-A (Clip)
  • Page 87 7.5.3 Burner Assembly (NPE-150S/180S/ 210S/ 240S) 10 4 10 5 Appendixes...
  • Page 88 Description Part # Remark Ignition Transformer 30010455A Fan Bracket (R ) 20022096A Thermistor 30009478A Exhaust 30014357A NPE-150S Heat Exchanger Assembly 30011706A NPE-180S 30011705A NPE-210S/240S 30014183A NPE-150S Ignitor 30012226A NPE-180S/210S/240S Packing (Φ26.5x2.4t) 20006868A 30014326A NPE-150S Heat Exchanger Outlet Pipe 30011519B NPE-180S...
  • Page 89 7.5.4 Waterway Assembly (NPE-180A/210A/240A) 12-5 12-4 12-2 12-3 12-1 Description Part # Remark Buffer Tank 30010953A Hot Water Outlet Pipe Assembly 30008338A Pipe Adapter 20024496A O-RING (P20) 20017212A Thermistor 30008366A O-RING (P18) 20006947A Pipe Clip 20007733B Return Pipe Assembly 30008350A...
  • Page 90 Description Part # Remark O-RING (P20) 20017212A O-RING (P19) 20017211A Water Filter 30008351A Pipe Clip 20007733B Circulation Pump 30010780B Pump Air Separator 30006831B Drain Plug 30008630C O-RING (P18) 20006947A Fastener 20017726A Water Adjustment Valve (WAV) 30008245A WAV Outlet Pipe Assembly 30008624B O-Ring (P16) 20011439A...
  • Page 91 7.5.5 Waterway Assembly (NPE-180S/ 210S/ 240S) Appendixes...
  • Page 92 Description Part # Remark Bracket 20026489A Thermistor 30008366A Water Filter 30008171A Cold Water Inlet Adapter 30011597A O-Ring (P15) 20017217A Fastener 20007859A Flow Sensor 30011534A O-Ring (P16) 20017210A Flow Sensor Outlet Adapter 20025959A Outlet Adapter 20025961A Fastener 20017726A Water Adjustment Valve (WAV) 30011532A Inlet Adapter 20025962B...
  • Page 93 7.5.6 Fan (Gas) Assembly 9 10 9 13 9 12 9 10 [NPE-180S/180A/210S/210A/240S/240A] [NPE-150S] Appendixes...
  • Page 94 Silence Adapter 20032569A NPE-210S/210A/240S/240A O-Ring (P20) 20006934A O-Ring (G70) 20007001A NPE-150S O-Ring (G75) 20018079A NPE-180S/180A/210S/210A/240S/240A Fan Packing 20022744A 20029420B NPE-150S (NG) 20034178A NPE-150S (LP) 20024159A NPE-180S/180A (NG) Gas Orifice 20024190A NPE-180S/180A (LP) 20019144B NPE-210S/210A/240S/240A (NG) 20024189B NPE-210S/210A/240S/240A (LP) 20030893A NPE-150S...

  • Page 95: Installation Check List

    Owner’s Manual. If you have additional questions or need assistance with installation, contact Technical Support at 1-800-519-8794 or 1-949-420-0420, or refer to the technical support section of Navien’s website (www.navien.com). Installing the Water Heater Have you maintained the required clearances from building openings and intake air vents?
  • Page 96 Connecting a Pressure Relief Valve Have you installed the pressure relief valve on the hot water outlet pipe near the water heater? 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 Have you installed a condensate drain line from the water heater to a drain or laundry tub? Venting the Water Heater...

  • Page 97: Navien H2Air Add-On Controller Kit (Optional)

    This device is designed to work with the NPE-A series models ONLY. Basic Principles The following diagram shows the basic operation of an NPE-A series water heater system with the Navien H2Air add-on controller. CAUTION Do not configure the system for DHW recirculation when it is configured to run an air handler using the H2Air add-on controller. DHW recirculation and Navien H2Air configurations cannot be used at the same time.

  • Page 98: Navien Hotbutton Kit (Optional)

    This device is designed to work with the NPE-A series models ONLY. Basic Principles The following diagram shows the basic operation of an NPE-A series water heater system with the Navien HotButton kit. CAUTION The Navien HotButton can be used ONLY with a water heater system configured for DHW recirculation.

  • Page 99: Requirements For The State Of Massachusetts

    7.9 Requirements for the State of Massachusetts NOTICE BEFORE INSTALLATION This appliance must be installed by a licensed plumber or gas fitter in accordance with the Massachusetts Plumbing and Fuel Gas Code 248 CMR Sections 4.00 and 5.00. IMPORTANT: In the State of Massachusetts (248 CMR 4.00 & 5.00) For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall...
  • Page 100 Memo...
  • Page 101 Memo...
  • Page 103 Getting Service If your water heater requires service, you have several options for getting service: Contact Technical Support at 1-800-519-8794 or on the website: www.navien.com. For warranty service, always contact Technical Support first. Contact the technician or professional who installed your water heater.

This manual is also suitable for:

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