Navien NPE-180A2 Installation Manual
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Navien NPE-180A2 Installation Manual

Npe condensing water heaters
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Installation Manual
NPE Condensing Water Heaters
Model
NPE-180A2
NPE-210A2
NPE-240A2
NPE-180S2
ENERGY STAR
NPE-210S2
Certi ed
NPE-240S2
NPE-150S2
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, ANSI Z223.1/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, Manufactured Home.
Do not install this water heater in a recreational vehicle, trailer, boat or other moving vehicles as it will
result in a Carbon Monoxide Poisoning Hazard.
ALWAYS read and follow this manual completely before using
the water heater. Save for future reference.
Tested and Certified to NSF/ANSI 372 for lead free* compliance.
* The wetted surface of this product contacted by consumable
NPE-150S2
Excluded
water contains less than one quarter of one percent (0.25%)
of lead by weight.

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Summary of Contents for Navien NPE-180A2

  • Page 1 Installation Manual NPE Condensing Water Heaters Model NPE-180A2 NPE-210A2 NPE-240A2 NPE-180S2 ENERGY STAR NPE-210S2 Certi ed NPE-240S2 NPE-150S2 ALWAYS read and follow this manual completely before using the water heater. Save for future reference. Tested and Certified to NSF/ANSI 372 for lead free* compliance.

  • Page 2: Table Of Contents

    6. Installing a Common Vent System 73 1. Important Safety Information 6.1 About the Common Vent System 2. About the Water Heater 6.2 Navien Common Vent Collar Kit (Back- draft Damper) 2.1 Included Items 6.3 Starting the Common Vent System 2.2 Accessories...

  • Page 3: Important Safety Information

    1. Important Safety Information The following Safety Alert Symbols are used WARNING in this manual. They are used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible serious injury or death. This Safety Alert Symbol precedes any safety message about risk of personal injury.
  • Page 4 California law requires the following Prop 65 WARNING warning to be provided: WARNING To prevent death, serious injury, or property damage: Cancer and Reproductive Harm - www.P65Warnings.ca.gov WARNING To prevent death, serious injury, or property damage: Do not turn on the water heater unless the ●...
  • 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 table carefully.

  • Page 6: About The Water Heater

    2. About the Water Heater 2.1 Included Items When you open the box, you will find the following items with the water heater. Check the box for each of the following items before installing the water heater. NPE-A2 Plumb Easy Condensate 3 Valve Set Neutralizer...

  • 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-180A2 NPE-180S2 NPE-210A2 NPE-210S2 NPE-240A2 NPE-240S2 NPE-150S2 Heat 18,000- Natural Gas, Capacity...

  • Page 8: The Front Panel

    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. Recirculation/ Space Heating Combustion/Error Displays recirculation (Always On/Intelligent/ Displays combustion/ Weekly/HotButton) and error status.

  • Page 9: Components

    Buffer Tank Condensate Trap Circulation Pump Gas Valve PCB Box Water Adjustment 2-Way Valve Valve DHW Supply Fitting Water Inlet Filter Cold Water Inlet Gas Inlet Fitting Fitting Condensate Drain Recirculation Inlet Fitting [NPE-180A2/ 210A2/ 240A2] About the Water Heater...
  • Page 10 Exhaust Duct Vent Installation Detector (VID) Intake Air Duct Exhaust Limit Temperature Sensor Intake Air Filter Fan Motor Exhaust Body Burner High Limit Fuse Ignition Transformer Burner Single Venturi Igniter/Flame Rod Primary Heat Exchanger Gas Pipe Secondary Heat Exchanger Air Pressure Sensor (APS) Front Panel Condensate Trap...
  • Page 11 Exhaust Duct Vent Installation Detector (VID) Exhaust Limit Temperature Sensor Intake Air Duct Exhaust Body Intake Air Filter Fan Motor Burner High Limit Fuse Ignition Transformer Burner Dual Venturi Igniter/Flame Rod Primary Heat Exchanger Gas Pipe Secondary Heat Exchanger Air Pressure Sensor (APS) Front Panel Condensate Trap...

  • 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-180A2/ 210A2/ 240A2] About the Water Heater...
  • Page 13 Supply Connections Description Diameter Air Intake 2 in. Exhaust Gas Vent 2 in. Hot Water Outlet Gas Inlet Condensate Outlet Cold Water Inlet 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.

  • Page 14: Rating Plate

    ALWAYS leak test the appliance and the gas connections before operating the appliance. ● This water heater cannot be converted from natural gas to propane without a Navien Propane Gas & High ● Altitude Conversion Kit. NEVER attempt a field conversion of this water heater without using the Navien Propane Gas &...

  • Page 15: Installing The Water Heater

    Once/Year when water quality does not meet EPA standards. Hard (61-120 mg/L) Softener** Damage caused by poor water quality is not or Navien 7-9 grains/gal covered under warranty. The following table shows PeakFlow is Hard (121-160 mg/L) the maximum contaminant levels allowed, based...
  • Page 16 Water Heater” on page 42. without a drain will void the warranty To ensure adequate venting and ventilation, follow and Navien will not be responsible for these guidelines: water damages that occur as a result. Maintain proper clearances from any openings in ●...
  • Page 17 Proximity to Fixtures and Appliances The combustion air must be free Note of flammable vapors or corrosive chemical fumes. Common corrosive Install the water heater near fixtures that deliver chemical fumes to avoid include or use hot water, such as bathroom, kitchen, fluorocarbons and other halogenated and laundry room faucets.

  • Page 18: Mounting The Water Heater To The Wall

    1. Drill holes into studs and drill holes into the drywall for plastic anchors. Insert anchors into Navien water heaters come with an upper mounting drywall. Affix the bracket securely to the wall bracket that is pre-drilled at 16 in. on center for and ensure that it is level and that it can support easy installation on standard wall studs.

  • Page 19: Connecting The Gas Supply

    This water 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. Doing so will result in dangerous operating conditions and will void the warranty.
  • Page 20 Navien recommends connecting the water heater as To connect the gas supply: the first water heater downstream of the gas meter, 1. Determine the gas type and pressure for the to ensure a sufficient gas supply. water heater by referring to the rating plate.
  • Page 21 BTUs. Also, ensure that the flexible line has no crimps or tight bends in it, as this will restrict gas flow. 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 22 Typical Propane Gas piping examples: Gas Regulator 12 in. W.C. Gas Regulators Full Size (2 Stage) Gas Pipe Pipe Low Pressure Regulator (before entering High home or Pressure building) Gas Tank Regulator Full size Gas Pipe Gas Tank Full Size Gas Pipe [Single Regulator System] If installation requires the use of...
  • Page 23 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.
  • Page 24 Maximum Liquefied Propane Delivery Capacity In Thousands of BTU/H (0.5 in. WC Pressure Drop) Length (including fittings) Pipe 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 Size...

  • Page 25: Connecting The Water Supply

    2. Open a hot water faucet. The water heater 8. When the water heater reaches its maximum should turn on and the gas in the gas supply firing rate, check the inlet gas pressure reading line will be purged. on the manometer. The gas pressure must fall within the ranges specified on page 24.
  • Page 26 Full port periodically to maintain proper water flow. Gas Valve Shutoff The following is a typical water piping example ● Valve for NPE-180A2/210A2/240A2 models. Gas Supply Water Condensate Drain Supply Cold Water Supply [NPE-150S2/180S2/ 210S2/ 240S2]...
  • Page 27 3.4.2 Selecting a Recirculation Mode Combination Water Heating and Space ("A2" Model Only) Heating On all “A2“ model Navien water heaters, you can choose from two pre-heating modes: internal When using the water heater for both water recirculation mode or external recirculation mode.
  • Page 28 Internal Recirculation Mode ("A2" Model For more information about the Note ● Recirculation settings, refer to Only) "Included Items" on page 79. Internal Recirculation is available ● To use the internal recirculation mode: only on A2-type models. 1. Connect the water supply. Model Step 1 Step 2 Step 3 2.
  • Page 29 If the A2-type model requires ● 1. Connect the water supply to support an external pump, follow the recirculation. Refer to the "[NPE-180A2/ 210A2/ instructions in "3.4.3 External Pump 240A2]" diagram on page 26. Wire Connection" on page 30 first and select YES on the screen 2.
  • Page 30 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 31 Domestic Cold Water Domestic Hot Water Domestic Recirculation Return [Type 2. Recirculation Using a Second Pump (NPE-A2 Models, Navien Internal Pump & External Pump)] 3.4.4 Navien HotButton Kit Condensate The NPE-A2/S2 series water Domestic Hot Water...
  • Page 32 Included Item Wiring Connection Table Terminal Wiring Connection 12 V Contacts for wireless push Signal Signal1 button or motion sensor connection HotButton Controller Signal2 Push Button Switch Contact #1 (Not polarity Push Button Switch Contact #2 sensitive) Items Not Included Contacts for temperature Sensor I sensor connection...
  • Page 33 Use UTP cables or cables with a diameter greater than AWG 24. ● Make sure that the total cable length does not exceed 328 feet (100 meters). ● Additional push button switches (#GXXX001426) and wall plates (#GXXX001427) can be purchased ● through Navien. Installing the Water Heater...
  • Page 34 HotButton DIP Switch Information Recirculation The following diagram shows the recirculation system's basic operation of an NPE-A2/S2 series water heater system with the Navien NaviCirc and Navien HotButton kit with or without a dedicated return line. The NPE-A2/S2 series water heaters Note ●...
  • Page 35 Sensor* DHW Supply Expansion Tank City Water Supply Return Water [NPE-180A2/210A2/240A2] Set the 2-way valve inside the water heater to the "Ext" position when using the NaviCirc Note ● recirculation valve. It is not necessary to install bypass piping from the cold line to the recirculation inlet fitting for ●...
  • Page 36 HotButton Kit Ball Valve Expansion Tank Check City Valve Water Supply Temperature Sensor* DHW Supply Return Water [NPE-180A2/210A2/240A2] *The push buttons and the temperature sensor are not included with the water heater but are available for purchase. Installing the Water Heater...
  • Page 37 3.4.6 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 WARNING maximum pressure rating of the water heater. Ensure that the maximum BTU/H rating on the ●...

  • Page 38: Connecting The Condensate Drain

    From the water heater directly into an external drain. Drain b. From the water heater, through a neutralizing The Navien Condensing Water Heater creates agent, and then into an external drain. condensation when it operates. This condensation If you choose this option, the has an acidic pH of 3 - 5.
  • Page 39 If option 'b' is selected for condensate disposal, the Navien condensate neutralizer kit is recommended. The condensate from the appliance flows condensate. An increased pH prevents corrosion of the installation's drainage system and the public sewer system.
  • Page 40 If the pH level is not specified, replace the neutralizing media when the pH is below 6.0. For replacement media, contact your local Navien distributor. Optional overflow bypass [Vertical installation]...

  • Page 41: Venting For Combustion Air

    ALWAYS remove contaminants or relocate ● air inlet and vent terminations to other clean areas. Use direct venting to supply clean air from outside the building. Navien recommends regular filter cleaning and maintenance in these areas. The warranty does not cover damage Note caused by air contaminants.
  • Page 42 3.6.1 Venting the Water Heater The water heater must be properly vented to ensure a constant supply of clean intake air and to ensure that exhaust air is properly removed from living DANGER areas. When venting the water heater, follow these guidelines: This appliance is certified as a Category IV For best results, keep the venting system as short...
  • Page 43 Connecting the Pipe to the Vent Collar 1. Measure 2- " (70 mm) from the end of the vent pipe, then draw a mark at that distance. Do not use primer or cement on the Note appliance connection. Mark 2- "...
  • Page 44 WARNING WARNING NEVER start the vent run with a street elbow ALWAYS turn on the water heater and test for at the vent collar to prevent serious injury or gas leaks along the exhaust vent using a bubble death. Using an elbow directly at the collar will test kit.
  • Page 45 Purpose WARNING The VID’s purpose is to guide the installer to fully insert the vent pipe to a depth of at least 2- " Carbon Monoxide Hazard (70 mm), into the collar. If the vent pipe is not To prevent serious injury or death: properly inserted and installed, it could separate from the collar resulting in flue gas spillage and ALWAYS insert vent pipe 2-...
  • Page 46 WARNING WARNING Carbon Monoxide Hazard Periodically inspect all vent pipe connections. The VID is not intended and should not be To prevent serious injury or death: relied upon to detect all instances of vent pipe movement or separation from the collar. ALWAYS visually inspect the vent pipe before ●...
  • Page 47 3.6.3 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 48 Ref Description Canadian installations US installations Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 3 ft (91 cm)* 3 ft (91 cm)* 2 ft (61 cm) from the center line of the terminal. Clearance to unventilated soffit 3 ft (91 cm)* 3 ft (91 cm)* Clearance to outside corner...
  • Page 49 Navien warranty. If there is any question about the possibility of back drafting in the installation location, use a direct venting system for the water heater.
  • Page 50 Inside corner detail REGULATOR VENT OUTLET In the event no regulator Legend: is present, H and I can be disregarded. = Vent Terminal = Air Supply Inlet = Area where terminal is not permitted Ref Description Canadian installations US installations Clearance above grade, veranda, 12 in.
  • Page 51 Ref Description Canadian installations US installations Clearance to a mechanical air 3 ft (91 cm) above if within 10 ft 6 ft (1.83 m) supply inlet (3 m) horizontally 7 ft (2.13 m) for mechanical draft systems (Category I appliances). Clearance above paved sidewalk Vents for Category II and IV or paved driveway located on...
  • Page 52 3.6.4 Selecting Vent Pipe Materials This product is set to use PVC as the default vent pipe material. If the return water temperature for the Venting requirements differ in the US and Canada. application is higher than 140°F (60°C) to circulate Consult the following chart or the most recent back to water heater, Exhaust Limit Control (parameter settings) must be set to OFF.
  • Page 53 This water heater has a built-in control to ● Adapter) limit the exhaust temperature to 149°F. As ISEI0203 or ISIA0203 (2” to 3” Increaser) a result, the Navien water heater can be Hart & Cooley Polyflue™ SW (Rigid) (Certified to vented with Schedule 40 PVC. ● ULCS636) In high temperature applications, the 2PF-xx (2”) or 3PF-xx (3”)
  • Page 54 IPEX Low Profile Termination Kit (Certified to ● Max. Vent Max. UL1738) # of Equivalent Lengths Size Length 2 in. Low Profile Vent Kit #397984 Elbows 3 in. Low Profile Vent Kit #397985 Reduce the maximum vent length accordingly for each elbow used: The following polypropylene vent terminations are 75 ft...
  • Page 55 The following stainless steel (AL29-4C) vent The following are some possible indoor venting components can be used as terminations: options: Duravent FasNSeal® (Certified to UL1738 and Two-Pipe Sidewall Venting ● ● ULCS636) Intake Air FSELB9003 (3” 90° Elbow) Exhaust Gas FSELB8803 (3”...
  • Page 56 Two-pipe Vertical Venting - Intake and exhaust Concentric Sidewall Venting ● ● pipes do not have to terminate in the same area. Combustion Air Intake 36” (900 mm) min. Combustion Exhaust Gas Air Intake Exhaust Exhaust 1 in. (25 mm) min. Intake Air 12”...
  • Page 57 Low Profile Two-Pipe Sidewall Venting* Two-Pipe Snorkel Sidewall Venting ● ● Intake Air Exhaust Gas (from outdoors) Exhaust (from appliance) Intake Air [Exterior View] * IPEX and Centrotherm Low Profile terminations only * Clearance above highest anticipated snow level or grade, or as required by local codes, whichever is ** Clearance above highest anticipated snow level greater.
  • Page 58 All installations using the fl exible vent materials ● The Navien Outdoor Vent Kit must be used to ● must be in INDIRECT vent applications only. ensure proper operation of the water heater.

  • Page 59: Connecting The Power Supply

    3.7 Connecting the Power Supply CAUTION WARNING Ensure that the power supply to the water heater is disconnected to prevent injury due to electrical shock. Electric shock hazard If local codes require the water heater to be To prevent serious injury or death: wired directly, remove and discard the factory- ALWAYS follow all applicable electrical codes installed plug.

  • Page 60: Setting The Dip Switches

    3.8 Setting the DIP Switches We recommend using a surge protector to ● protect the water heater from power surges. The water heater has two DIP switch locations: If there is a power failure in cold weather areas, ● on the main circuit board (PCB) and on the front the freeze prevention system in the water heater panel.
  • Page 61 Setting Up the Altitude WARNING 1. Press and hold the Menu button ( ) and the Back button ( ) simultaneously for 3 seconds ALWAYS install the High Altitude Conversion ● on the front panel to access the Service/Installer Kit if needed based on the elevation of the menu.

  • Page 62: Configuring The Remote Controller System

    4. Configuring the Remote Controller System Remote Controller System (optional) 3. Connect the end of the extension cable to the cable connected to the remote controller. 4.1 Included Items When you open the box, you will find the following items with the remote controller. Check the box for each of the following items before installing the remote controller.

  • Page 63: Remote Controller

    4.5 Remote Controller LCD display LED indicator Indicates functions and Indicates the status of water current status. heater. - Green: Normal Mode. - Red: Error occurred. Preheat & Timer button Lock button - Access the timer settings. Locks the other button - Recirculation ON.

  • Page 64: Multi Remote Controller System

    4.6 Multi Remote Controller 1. Press the Down button on the remote controller displaying “MAIN” to set its operation mode to System “SUB. ” The multi remote controller system (30022717A) consists of one main remote controller and one sub remote controller. The system must have only one main remote controller.
  • Page 65 4.6.2 Checking the Multi Remote 4. “SYNC” appears on the LCD display for 5-10 seconds until it syncs with the connected panel Controller System Setting and the main remote controller after the ID is assigned. After completing the multi remote controller setting, you can check the setting by pressing the OK button and Lock button simultaneously for 2 seconds.

  • Page 66: Entering Lock Mode

    4.7 Entering Lock Mode 4.8 Setting the Clock To prevent accidental pressing of the buttons and to 1. Press the Preheat & Timer button for 2 seconds. prevent children from adjusting the controller, you can activate the Temperature Lock Mode. To activate or deactivate Lock Mode, press the Lock button for 2 seconds.

  • Page 67: Setting The Recirculation Timer

    4. Press the OK button to finish and save the 2. Set the recirculation activation time by pressing updated time. the Up or Down button. Then, press the OK button to set the deactivation time. 4.9 Setting the Recirculation The recirculation timer settings are Note Timer divided in 30 minute increments.

  • Page 68: Starting Recirculation

    4.11 Canceling all Timer Settings 5. During the reservation schedule, the preheating icon turns on and the Reservation area starts flashing. Press and hold the Preheat & Timer and OK button simultaneously for 2 seconds. “CLR” appears for 3 seconds and all timer settings are canceled.

  • Page 69: Installing A Cascade System

    You can connect up to 32 water heaters to meet high-volume hot water demands. Some possible connection options include the following: Recirculation via Internal Pumps (“A2” model only): ● Union Communication Ball Valve or Navien Cable Plumb Easy Valve Check Valve Faucet Expansion Tank...
  • Page 70 Multiple NPE-S2 Units: ● Union Communication Ball Valve or Navien Cable Plumb Easy Valve Check Valve Faucet Expansion Tank Pressure Relief Valve Gas Supply Line DHW Supply Line Cold Water Supply Line [NPE-150S2/180S2/ 210S2/ 240S2] 5.1.1 Piping Sizes and Considerations...

  • Page 71: Connecting The Communication Cables

    Up to 32 water heaters can be connected with button ( ) to start the cascade system setting. Navien Ready-Link communication cables. Select one of the water heaters in the cascade system as the main water heater, and then connect the other water heaters to it as sub.
  • Page 72 5. After an ID is assigned to each sub unit, press the OK button ( ) on the main unit. The temperature information on the main unit’s display will sync with the sub unit’s display. To add additional sub units later, Note ●...

  • Page 73: Installing A Common Vent System

    The Navien Common Vent System* provides an easy in excessive levels of carbon monoxide and can way to install the vent system for up to 12 Navien lead to serious injury or death. NPE water heater units. By sharing the main intake...
  • Page 74 If the water heater units will be installed in areas ● the Navien Common Vent Collar Kit must be where snow is known to accumulate, protect installed in the exhaust duct of each water the vent termination from blockage. Ensure that heater unit.
  • Page 75 The water heater units can be mounted either IN- LINE or BACK TO BACK. Side Back Side Front Bottom [Navien Modular Configuration with Rack System] [Clearance Chart for Common Vent Applications] Bottom 12” (300 mm) Back 0.5” (13 mm) Side 3”...
  • Page 76 General and Local Standards Selecting Vent Pipe Materials Information Consult the following chart or the most recent edition of ANSI Z223.1/NFPA 54, as well as all applicable When installing and operating the common vent local codes and regulations when selecting vent system, the following standards and regulations pipe materials.
  • Page 77 3. Hold the pipe and pipe fitting together for WARNING about 15 seconds until the cement sets. Use approved solvent type cement Note ● ALWAYS ensure your work area is well ventilated for the proper vent materials. or wear an approved organic vapor respirator Use solvent type cement only.
  • Page 78 Example of a Typical Installation Exhaust (Direct & Non-Direct Vent) The following illustration depicts an example of a common vent system installed for a cascade system of 12 Navien NPE heater units. End Cap Unit Unit Unit Intake Siphon Loop Drain Hose...

  • Page 79: Navien Common Vent Collar Kit (Back-Draft Damper)

    Screw (4 ea) 6.2 Navien Common Vent Collar Kit (Back-draft Damper) VID jumper wire The Navien Common Vent Collar Kit includes a backdraft damper preventing the flue gases and Specifications cold outside air from entering the water heater when the combustion fan is off. The kit includes the cascade cable.

  • Page 80: Starting The Common Vent System

    Maintenance Port 6.3 Starting the Common Vent System Navien Common Vent Collar Kit has a maintenance port to allow you to easily inspect the operating condition of the damper plate. 6.3.1 Common Vent Collar Kit Assembly Follow the instructions below to assemble the...
  • Page 81 6.3.2 Connecting the Pipe to the 4. Tighten the four mounting screws to secure the Common Vent Collar Kit in place. The screws (x Common Vent Collar Kit 4) are supplied with the Common Vent Collar Kit. WARNING ALWAYS properly cut the pipe at a 90° angle and deburr the vent pipe before installing so the pipe is fully connected to the exhaust gas vent fitting.
  • Page 82 1. Measure 1- ” from the end of the vent pipe, WARNING then draw a mark at that distance. NEVER start the vent run with a street elbow at the vent collar to prevent serious injury or death. Using an elbow directly at the collar will not allow for a tight seal between the appliance and the vent pipe.
  • Page 83 Multiple reducers can be used to allow Note WARNING proper connection of 2” vent pipe to the common vent system. Carbon Monoxide Hazard 2. Assemble the wye joint or wye assembly to the To prevent serious injury or death: vent pipe. Apply solvent cement to the mating surfaces.

  • Page 84: Connecting And Terminating The Vent Pipe

    6.4 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 85: Installing A Condensate Drain

    6.5 Installing a Condensate Drain To install a condensate drain to the Common Vent system: Refer to the following examples to install a 1. Form a loop with a drain hose and fix it with a condensate drain hose (field supplied) to the tie.

  • Page 86: Setting Up The Common Vent System

    6.6 Setting up the Common Vent 6.7 Common Vent Termination System Clearances WARNING 6.7.1 Direct Vent Application – Vertical Installation Electric Shock Hazard To prevent serious injury or death: 36" (91cm) min. Exhaust ALWAYS disconnect power before servicing. ● 12" Intake (30.48 cm) NEVER turn power on until the electrical...

  • Page 87: Maintenance

    6.7.3 Direct Vent Application – 6.8 Maintenance Horizontal Installation Periodically check the damper condition inside the Common Vent Collar Kit through the maintenance port to ensure optimal performance of the system. Follow the instructions to check the damper condition and replace the Common Vent Collar Kit if necessary. 1.
  • Page 88 3. Reinstall the gasket and maintenance port cover, and then fix them with a set screw. If condensate comes out the port when Note opened, check for proper drainage or any blockage. 4. Visually inspect the maintenance port to ensure that the gasket is properly installed between the maintenance port and the maintenance port cover.

  • Page 89: Operating The Water Heater

    7. Operating the Water Heater WARNING To prevent death, serious injury or property damage: Ensure the water heater is filled with water ● before turning on the water heater. If overheating occurs or the gas supply fails to ● shut off, shut off the gas supply to the water heater at the manual gas valve.

  • Page 90: Adjusting The Water Temperature

    7.3 Adjusting the Water 5. Select the recirculation option. A2-Type: No Recir/Int.Recir/Ext.Recir Temperature ● S2-Type: No Recir/Ext.Recir ● WARNING 6. Select the recirculation mode. A2-Type: ● – Int.Recir (Always On/Intelligent/Weekly) Before adjusting the water temperature, read – Ext.Recir (Always On/Intelligent/Weekly/ “To prevent burns:”...

  • Page 91: Accessing The Basic Menu Items

    7.3.2 Resetting the Water Heater You can adjust the temperature by 1 degree increments as shown below, depending on the temperature range: If an error message appears, you can try resetting the water heater to resolve the problem. To reset the water heater, press the Back button ( Adjusting the water Temperature range...
  • Page 92 7.4.1 Setting the Recirculation Mode 2. Press the Up button ( ) or the Down button ) to switch between the information items 1. Press the Menu button ( ) on the front panel, and press the OK button ( ) to select an item.
  • Page 93 A2-type models. Set to use the included HotButton controller. Refer 4. HotButton “3.4.4 Navien HotButton Kit” on page 31. * To choose this option, you must set up the Time settings in the Configuration menu. S2-type models are automatically set Note ●...
  • Page 94 Setting the Weekly Schedule 2. Press the Up button ( ) or the Down button ) to switch between the information items. When setting up the Weekly option, select Weekly, Press the OK button ( ) to select an item and and select 1 Day, 3 Day, or 7 Day to go to the view its information.
  • Page 95 Item Description AHU communication state 18. AHU Comm (when the AHU Comm is enabled) 19. Recirc Setting Recirculation setting Info information External pump use 20. Recirc Ext. information for Pump Info recirculation A list of 10 recent errors are displayed on the screen, 21.
  • Page 96 7.4.4 Viewing Other System Information 7.4.5 Setting the Display Options 1. Press the Menu button ( ), and then select 1. Press the Menu button ( ) and then select 4. EMS Data. 5. Configuration. 2. Press the Up button ( ) or the Down button 2.

  • Page 97: Accessing Advanced Menu Items

    7.5 Accessing Advanced Menu 3. Press the Up button ( ) or the Down button ) to switch between information items. Press Items the OK Button ( ) to select an item to view the information. 7.5.1 Viewing the Installer Menu Item Description 1.
  • Page 98 7.5.1.1 Viewing Service Status Info 7.5.1.2 Setting the Operation Parameters 1. From the Installer Menu, select 1.Service Status 1. From the Installer Menu, select 2. Parameter Info. Settings. 2. Press the Up button ( ) or the Down button 2. After entering the parameter setting screen, ) to switch between information items.
  • Page 99 Item Description Item Description Enable or disable the Enable or disable the use of exhaust limit control high temperature water. function. 6. Exhaust Limit Setting range: ● 12. Commercial - Enable: 140 °F (60 °C) - Control Setting range: Enable, ●...
  • Page 100 7.5.1.3 Setting the Application Category Item Description 1. From the Installer Menu, select 3. Application Set the pump run Settings. delay time when AHU and AHU pump control are 1. AHU Burn Delay Time Setting range: ● 0 - 120 Sec Default: 30 Sec ●...
  • Page 101 Category Item Description Category Item Description Set the pipe length Set the outdoor high temperature to the desired position for virtual when AHU and the outdoor reset turn-off function using the internal function are ON. thermostat when 4. AHU Outdoor Setting range: ●...
  • Page 102 Category Item Description Category Item Description Set whether to Set the use an external temperature DHW tank. to turn on an 1. External DHW external DHW Setting range: ● Tank Setting tank combustion. Enable, Disable Setting range: ● Default: ● 4.
  • Page 103 Outdoor Reset Control 2-Stage T/S Output Heat-Capacity Models with the 2-stage air handler control function The following settings including Note (W1, W2) can use a 2-stage thermostat or can be the Outdoor Reset Control are only automatically controlled by the H Air controller (If applicable when using the H2Air the H...
  • Page 104 Item Description Item Description Number of an individual Execute this menu on the 1. Cascade Info water heater and the status main unit of a cascade system to end cascade operation. All Number of currently units will return to a single 2.
  • Page 105 Item Description Item Description Set the heating capacity This procedure slowly compensation standard increase RPM of the fan when the cascade motor from 0 to the 10. Cascade Unit OFF HC 1. Fan Motor combustion is OFF. maximum and then Offset decreases it to 0, and then Setting range: –5% - +5%...
  • Page 106 7.5.5 Operating in Descale Mode Back button ( ) simultaneously for 3 seconds and then select 4. Special Operations. Use of this mode requires a Navien Note NPE-A2 Flush Kit. Do not use this mode when using field-supplied pump &...

  • Page 107: Appendixes

    ● for the proper installation of this kit. The by Navien. Gas & High Altitude conversion installation is not proper and complete until using any other parts will result in extremely the operation of the converted appliance is dangerous burner operation, leading to fire, checked as specified in the manufacturer’s...
  • Page 108 Φ6.50 Φ5.10 Size 1. Turn off both gas and water supply to the water heater. NPE-180A2/S2 Orifice Identification Gas Type Natural Gas Propane Gas 2. Using a Phillips hand screwdriver, remove 4 screws (2 from the top and 2 from the bottom)
  • Page 109 Gas Valve away from the Fan Assembly the valve, causing potential severe personal to access the Gas Orifice. injury, death or substantial property damage. Navien water heaters are shipped ready to Location B: fire natural gas ONLY. Remove four...
  • Page 110 O-ring GAS : NG GAS : NG (H) GAS : LP 4.50 / 6.30 4.65 / 6.50 3.65 / 4.95 <NPE-180A2/S2 Orifice Identification> <NPE-150S2> GAS : NG GAS : NG (H) GAS : LP 4.80 / 7.50 5.05 / 7.75 3.90 / 5.65...
  • Page 111 10. Set the panel setting corresponding to the DANGER installation altitude. a. Press and hold the Menu button ( ) and the Back button ( ) simultaneously for Fire and Explosion Hazard 3 seconds on the front panel to access the To prevent serious injury or death: Service/Installer menu.
  • Page 112 This unit may be installed at elevations 12. Measure and adjust the gas/air ratio. Note ● up to 10,100 ft (3,078 m) for use with Option 1. Using Combustion Analyzer natural gas and propane. (recommended) To use the unit at a specific altitude, the a.
  • Page 113 c. Fully open several hot water fixtures and set Option 2. Using Digital Manometer the water heater to operate at 1-stage MIN a. Open the offset pressure port by loosening mode (refer to “Setting the Operation Mode” the screw two turns as shown in Figure 9. on page 114).
  • Page 114 c. Fully open a hot water fixture and set the 13. Once the CO or offset values have been water heater to operate at 1-stage MIN confirmed, apply the included conversion stickers mode (refer to “Setting the Operation Mode” to show that the appliance has been converted on page 114).

  • Page 115: Flushing The Heat Exchanger

    To flush the Heat Exchanger: NPE-A2 Model NPE-A2 Flush Kit (optional) Navien Easy valve Kit Figure 12. NPE-A2 Flush Kit Use of this mode requires a Navien Note NPE-A2 Flush Kit. Do not use this mode Hot Water Line when using field-supplied pump &...
  • Page 116 To flush the Heat Exchanger: NPE-S2 Model Navien Easy valve Kit Hot Water Line Cold Water Line Circulation Pump Flushing Kit For more information about flushing Note the NPE-S2’s Heat Exchanger, refer to “4.3 Flushing the Heat Exchanger” on page 12 of the User’s Information Manual.

  • Page 117: Technical Data

    8.3 Technical Data Pressure Drop Curve Water Flow (GPM) [NPE-240A2/ 240S2] Water Flow (GPM) [NPE-210A2/ 210S2] Water Flow (GPM) [NPE-180A2/ 180S2] Water Flow (GPM) [NPE-150S2] Appendixes...
  • Page 118 ΔT - Temperature Rise(℉) [NPE-210A2] 10.0 ΔT - Temperature Rise(℉) [NPE-180A2] At altitudes above 2,000 ft (610 m), the outlet flow will be reduced by 3% (NG Model) or 4.5% (LP Note Model) for each 1,000 ft (305 m) of altitude gain.
  • Page 119 Outlet Flow Data ΔT - Temperature Rise(℉) [NPE-240S2] ΔT - Temperature Rise(℉) [NPE-210S2] ΔT - Temperature Rise(℉) [NPE-180S2] 10.0 ΔT - Temperature Rise(℉) [NPE-150S2] At altitudes above 2,000 ft (610 m), the outlet flow will be reduced by 3% (NG Model) or 4.5% (LP Note Model) for each 1,000 ft (305 m) of altitude gain.

  • Page 120: Wiring Diagram

    8.4 Wiring Diagram CON3 CON2 CON8 CON6 CON9 CON7 [NPE-150S2, 180A2/S2, 210A2/S2, 240A2/S2] 120 Appendixes...

  • Page 121: Ladder Diagram

    8.5 Ladder Diagram LIVE NEUTRAL Option 120VAC Relay 1 External Pump FILTER Relay 2 Igniter Relay 3 Circulation Pump NPE-A2 Serise Only Relay 4 Venturi DC15V Transformer BLDC-FAN Primary Speed Control Sencondary Water Ad justment AC130 Mixing Valve Valve (NPE-S2 Serise Only Trans DC24V DC 9V...

  • Page 122: Component Assembly Diagrams And Parts Lists

    8.6 Component Assembly Diagrams and Parts Lists 8.6.1 Case Assembly 122 Appendixes...
  • Page 123 Description Service Code Part # Remark 20049732* NPE-180A2/210A2/240A2 Case 20049515* NPE-150S2/180S2/210S2/240S2 Cover 30026143A 30024855* Air Pressure Sensor 30021100B 30021100* Intake Air Filter 30016248B 30016248* Panel Bracket 20049470* Front Panel 30027275A 30024955* Power Switch 30009482A 30009482* 30024835* NPE-180A2/210A2/240A2 30027274A 30024837* NPE-150S2/180S2/210S2/240S2...
  • Page 124 8.6.2 Burner Assembly (NPE-180A2/ 210A2/ 240A2) 27 28 124 Appendixes...
  • Page 125 Description Service Code Part # Remark 30026111A 30024850* NPE-210A2/240A2 Heat Exchanger Assembly 30026110A 30025104* NPE-180A2 SC-Ex Inlet Adaptor 20049491* SC-Ex Outlet Adaptor 30024763* Thermistor 30008366A 30008366* Screw, S10A, 4×6 20017962A 20017962* Fastener 20007853A 20007853* Flow Sensor Assembly 30024866A 30024866* Latent-Ex Outlet Adaptor...
  • Page 126 8.6.3 Burner Assembly (NPE-150S2/180S2/ 210S2/ 240S2) 29 30 8 29 Description Service Code Part # Remark 30026111B 30025252* NPE-210S2/240S2 Heat Exchanger Assembly 30026110B 30025110* NPE-180S2 30026109B 30025477* NPE-150S2 SC-Ex Inlet Adaptor 20049491* SC-Ex Outlet Adaptor 30024763* Thermistor 30008366A 30008366* Screw, S10A, 4×6 20017962A 20017962* Fastener...
  • Page 127 Description Service Code Part # Remark Fan Bracket (R) 20022096* Fan Damper 30008825A 30008825* Fan Packing 20022744* Fan Bracket (F) 20022095A 20022095* Screw, S18A, M4×6 20038859* Burner Fuse Bracket 20050642* Burner Fuse 30025036A 30025036* 30024780A 30024780* NPE-180S2/210S2/240S2 Heat Exchanger Outlet Pipe 30024779A 30024779* NPE-150S2...
  • Page 128 8.6.4 Waterway Assembly (NPE-180A2/210A2/240A2) 19 8 21 22 Description Service Code Part # Remark Buffer Tank 30016125A 30023708* Fastener 20017724A 20017724* O-RING (P29) 20017923A 20017923* Buffer Tank Adapter 20035697A 20035697* Fastener 20017726* Buffer Tank Pipe A 20017759* Buffer Tank Pipe B...
  • Page 129 Description Service Code Part # Remark Hot Water Outlet Adapter 30008338* Thermistor 30008366A 30008366* Clip 20007733B 20007733* O-RING (P20) 20017212A 20017212* Pipe Adapter 20024496A 20024496* O-RING (P16) 20017210A 20017210* Check Valve Adapter 20048412A 20048412* Check Valve 30024442A 30008360* O-RING (P19) 20017211A 20017211* Water Filter...
  • Page 130 8.6.5 Waterway Assembly (NPE-150S2/180S2/210S2/240S2) 130 Appendixes...
  • Page 131 Description Service Code Part # Remark Syphon 30024921A 30024921* Cold Water Inlet Adapter 30024923A 30024923* Hot Water Outlet Adapter 30024924* Water Adjust Valve 30022123A 30022123* (Built in Flow Sensor) Mixing Valve 30022124A 30022124* Screw, STS430, M4×10 20038758* Clip 20045992A 20045992* O-RING (P18) 20006947A 20006947*...
  • Page 132 8.6.6 Fan (Gas) Assembly [NPE-210S2/210A2/240S2/240A2] [NPE-180S2/180A2] [NPE-180S2/180A2/210S2/210A2/240S2/240A2] 132 Appendixes...
  • Page 133 [NPE-150S2] Appendixes...
  • Page 134 Description Service Code Part # Remark 30024773A 30024773* NPE-210S2/240S2/210A2/240A2 Gas Pipe 30024772A 30024772* NPE-180S2/180A2 30025069A 30025069* NPE-150S2 Gas Connector 20018430A 20018430* Gas Valve 30011586B 30011586* Gas Inlet Adapter 20023809A 20023809* Gas Inlet Adapter Packing 20023581* Screw, S10A, M4×12 20006390A 20006390* O-Ring (P20) 20006934A 20006934*...

  • Page 135: Installation Checklist

    “Troubleshooting” in the 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.navieninc.com). Installing the Water Heater...
  • Page 136 Connecting a Pressure Relief Valve Have you installed an approved pressure relief valve on the water heater? Does the rating of the pressure relief valve match or exceed the maximum BTU rating of the water heater? Is the pressure relief valve at least in.

  • Page 137: Navien H2Air Add-On Controller Kit (Optional)

    This device is designed to work with the NPE-A2/S2 models ONLY. Basic Principles The following diagram shows the basic operation of NPE-A2/S2 water heater system with the Navien H2Air add- on controller. Do not configure the system for DHW recirculation when it is configured to run an air handler using Note the H2Air add-on controller.
  • Page 138 System Diagram for NPE-A2 NPE-A2 Series Water Heater Outdoor Sensor Internal Pump Thermostat Heat Demand Output Expansion Tank Space Heating Check Supply Valve Cold Water Supply Space Heating Flow Switch External Pump Return (Optional)* *Connect the external pump cable to the NPE-A2 PCB. Mixing Valve DHW Supply System Diagram for NPE-S2...

  • Page 139: Ahu Application With

    8.9 AHU Application with RS-485 Communication (optional) This application is designed to work with the single unit ONLY. Note ● The air handler must also be compatible with RS-485 communication features. Consult with the ● air handler manufacturer for additional guidelines and instructions. NPE-A2 Series Water Heater Thermostat...

  • Page 140: Requirements For The State Of Massachusetts

    8.10 Requirements for the State 4. INSPECTION. The state or local gas inspector of the side wall horizontally vented gas fueled of Massachusetts equipment shall not approve the installation unless, upon inspection, the inspector observes carbon monoxide detectors and signage NOTICE BEFORE INSTALLATION installed in accordance with the provisions of 248 CMR 5.09 and 5.12.
  • Page 141 Memo...

  • Page 143: Date Purchased

    Installation location and type ● Error code, if any appears on the front panel display ● Version: 1.1 (May, 2023) Navien, Inc. 800.519.8794 www.navieninc.com 20 Goodyear, Irvine, CA 92618 T H E L E A D E R C O N D E N S I N G...

This manual is also suitable for:

Npe-210a2Npe-240a2Npe-180s2Npe-210s2Npe-240s2Npe-150s2

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