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Common questions
Common Questions
8 totalWhat are the minimum clearances for indoor installation of the Navien NPE-240A?
For indoor installation, the minimum clearances from the water heater are: top – 9 inches (229mm), back – 0.5 inches (20mm), front – 4 inches (100mm), sides – 3 inches (76mm), and bottom – 12 inches (300mm).
How do I check the rating plate for gas type?
The rating plate indicates the specific gas type that the water heater is configured to use. The installation must be carried out using only the same gas type indicated on this plate; otherwise, it will cause abnormal combustion and malfunction.
What safety precaution is required when mounting the Navien NPE-240A?
Do not install water heater on dry wall only. Drill in the supplied anchor bolts after considering where the vent termination will be located.
How do I configure internal and external recirculation settings?
Refer to the pages that describe 'Internal Recirculation Settings' for configuration options including: No Recirculation, Internal Pump-Only, Internal & External Pumps. These include specific DIP switch settings.
What is required for testing the inlet gas pressure post-installation?
Shut off the manual valve, attach a manometer to measure and check the inlet gas pressure. Required range: NG (3.5"~10.5" WC) LP (8.0"~13.5" WC). Adjust as necessary with regulator.
Do I need to clean filters after initial setup?
After the first ten minutes of use, turn off and clean both cold water filter and recirculation water filter for any accumulated debris.
Full Manual
4 pages
Model
##### NPE-180A / 210A / 240A NPE-180S / 210S / 240S
Quick Installation Guide
STEP 1 Before Installing
Read the Installation Manual and Operation manual before installing.
This product must be installed and serviced by a licensed plumber, a licensed gas fitter, or a professional service technician. Navien is not liable for any damages or defects resulting from improper installation.
When applicable, the installation must conform with Manufactured Home Construction and Safety Standard, Title 24 CFR, Part 3280 and/or CAN/CSA Z240 MH Series, Mobile Homes.
######## WARNING Follow all local codes and/or the most recent edition of the National Fuel Gas Code (ANSI Z223.1/NFPA 54) in the USA, or the Natural Gas and Propane Installation Code in Canada (CAN/CGA B149.1).
Safety
DO NOT install in areas with excessively high humidity.
Location Requirements
Select the best location on “Choosing an Installation” in the installation Manual.
Allowable minimum clearances
For indoor installation
|Clearance from:
|Indoor Installation
|Outdoor Installation
| |---|---|---| |Top|9 inches (229mm) minimum|36 inches (900mm) minimum| |Back|0.5 inches (20mm) minimum|0.5 inches (20mm) minimum| |Front|4 inches (100mm) minimum|24 inches (600mm) minimum| |Sides|3 inches (76mm) minimum|3 inches (76mm) minimum| |Bottom|12 inches (300mm) minimum|12 inches (300mm) minimum|
STEP 2 Installing
#### Unpacking
Navien water heater
Operation Manual and Installation Manual
Wall mounting bracket
Tapping screws and anchors
Vent terminators
Wall flanges
Conversion Kit
Spare Parts
#### Checking the Rating Plate
This water heater is configured for Natural Gas from the factory. If conversion to Propane Gas is required, the conversion kit supplied with the water heater must be used.
######## WARNING
Navien America Inc. is not liable for any property damage and/or personal injury resulting from improper conversions.
#### Mounting on the Wall Removing the Front Cover
######## CAUTION
Do not install water heater on dry wall only
Drill in the supplied anchor bolts after considering where the vent termination will be located.
Secure the mounting bracket to the wall with the tapping screws and anchors.
Lift up the water heater, rest the unit on the hooks provided on the wall bracket on the wall.
Remove the 4 screws
#### Gas Piping Connections
Gas Inlet Adapter
Example:
The water heater is recommended to be the first appliance to be connected to the gas supply line.
Gas meter 425 CFH
≥ Water heater 195 CFH
+ Furnace 58.8 CFH
+ Domestic gas stove 63.7 CFH
Bottom View
######### • 1/2" rigid pipe can be used; refer to the sizing tables in the Installation Manual for limitations. Avoid using 1/2" corrugated connectors or tubing as noise may occur.
Gas regulator
Gas Supply Line
Gas meter’s capacity ≥ Total gas capacity of connected appliances Gas supply
#### Water Piping Connections (NPE-180A/210A/240A)
Internal Recirculation
External Recirculation
Union
Union
Full port
Pressure Relief Valve
Full port
Pressure Relief Valve
Shutoff Valve
Shutoff Valve
Gas Supply
Hot Water Supply
Gas Supply
Recirculation Line
Condensate Drain
Hot Water supply
Condensate Drain
Cold Water Supply
Cold Water Supply
Expansion Tank
##### Internal Recirculation Settings
##### External Recirculation Settings
2-way valve
2-way valve
ON OFF
ON OFF
#### Condensate Drain Connection
A condensate drain pipe must be connected to the 1/2” condensate outlet fitting at the bottom of the unit and water must be poured into the exhaust connection to fill the condensate trap.
Syphon
Water
Condensate Outlet
Floor drain
The end of the 1/2” (NPT) plastic piping should drain into a laundry tub or into a floor drain.
Do not submerge the end of the pipe in water.
Note
Direct to the external drain
To the laundry tub
To the drain via a neutralizer
To the laundry tub via a condensate pump
External drain
#### Venting
##### Vent Termination Options
##### Concentric Vent Termination
######## Indoor Horizontal Vent Termination Interior view
######## Vertical Vent Termination
######## Sidewall installation
Exterior view 12"(300mm) min.
Combustion Air
Intake Air
36" (900mm) min.
Exhaust Gas
Combustion Air
Exhaust
12"(300mm) min.
Vent
12"(300mm) min.
Maintain 12" min. clearance above highest anticipated snow level or grade.
Intake
1" (25mm) min
12"(300mm) min.
12" min. From any obstructi on above, below, left, or right
######## Roof installation Vent
######## Image of outdoor Vent Cap
######## Sidewall vent Termination
Combustion Air
Top
Exhaust gas
Intake Air
Maintain 12" min. (18" min. for Canada) Clearance above highest anticipated snow level. Maximum of 24" above roof
Back
Side
Side
Front
12" (300mm) min.
Combustion Air
Bottom
Vent
##### Exhaust Vent Piping Materials
##### Venting Length
Venting requirements differ in the US and Canada. Consult the following chart or the most recent edition of ANSI Z223.1/NFPA 54 or CAN/CGA B149.1, as well as all applicable local codes and regulations when selecting vent pipe materials. Do not use cellular core PVC (ASTM F891), cellular core CPVC, Radel® (polyphenolsulfone) for the exhaust vent.
3” pipe venting 2” pipe venting
######## Navien recommended venting materials
|Locale|Recommended Vent Materials| |---|---| |USA|•PVC Schedule 40 (Solid core)
•CPVC Schedule 40 or 80 (Solid core)
•Approved Polypropylene*
| |Canada**|•Type BH Special Gas Vent Class IIA (PVC)
•Type BH Special Gas Vent Class IIB (CPVC)
•Type BH Special Gas Class IIC (Polypropylene)
|
Maximum Length 150' Maximum Length 60'
2-to-3 inch reducer
Maximum number of elbows: 8
Maximum number of elbows: 6
#### Electrical Connections
###### Remote Controller Connection Power Connection
120 VAC 60 Hz Min. 2 Amp current with proper grounding
(Optional)
CAUTION Using abnormally high or low AC voltage may cause abnormal operation, thereby causing fire which reduces the life expectancy of this product.
####### CAUTION
Disconnect the power to the water heater before installing the remote controller
######## Safety
DO NOT touch the power cord with wet hands.
DO NOT expose to excessive amounts of water.
###### Confirmation of Panel DIP Switch Settings
|1-3
|Pump and Recirculation|No Recirculation|1-OFF, 2-OFF, 3-OFF| |---|---|---|---| |1-3
|Pump and Recirculation|External Pump Only-External Recirculation|1-OFF, 2-OFF, 3-ON| |1-3
|Pump and Recirculation|Internal Pump Only-Internal Recirculation|1-ON, 2-OFF, 3-OFF| |1-3
|Pump and Recirculation|Internal Pump Only-External Recirculation|1-OFF, 2-ON, 3-OFF| |1-3
|Pump and Recirculation|Internal Pump Only-Intelligent Preheating*|1-ON, 2-ON, 3-OFF| |1-3
|Pump and Recirculation|Internal & External Pump-Internal Recirculation|1-ON, 2-OFF, 3-ON| |1-3
|Pump and Recirculation|Internal & External Pump-External Recirculation|1-OFF, 2-ON, 3-ON| |1-3
|Pump and Recirculation|Internal & External Pump-Intelligent Preheating*|1-ON, 2-ON, 3-ON| |4|Display Temperature Unit|Celsius|4-ON| |4|Display Temperature Unit|Fahrenheit|4-OFF| |5
|Well Pump
|Well Pump Operation|5-ON| |5
|Well Pump
|Do Not Use Well Pump|5-OFF| |6|DHW Storage Tank/Solar System
|Storage Tank/Solar System Operation|6-ON| |6|DHW Storage Tank/Solar System
|Do Not Use Storage Tank/Solar System|6-OFF| |7 & 8|Lime Alarm
|6 Months Alert|7-ON, 8-OFF| |7 & 8|Lime Alarm
|12 Months Alert|7-OFF, 8-ON| |7 & 8|Lime Alarm
|24 Months Alert|7-ON, 8-ON| |9 & 10|High Altitude****|0 ~ 1,999 ft (0 ~ 609 m)|9-OFF, 10-OFF| |9 & 10|High Altitude****|2,000 ~ 5,399 ft (610 ~ 1,645 m)|9-ON, 10-OFF| |9 & 10|High Altitude****|5,400 ~ 7,699 ft (1,646 ~ 2,346 m)|9-OFF, 10-ON| |9 & 10|High Altitude****|7,700 ~ 10,100 ft (2,347 ~ 3,078 m)|9-ON, 10-ON|
Switch Function Setting
STEP 3 After Installing
Opening All the Valves
Gas shutoff valve
Pressure relief valve
Open all the valves.
Shutoff valves
Navien, Inc. 20 Goodyear, Irvine, CA 92618 Tel: (800) 519-8794, Fax: (949) 420-0430 www.navien.com
Operating the Water Heater
Power ON Adjust water Temperature View Basic Information Resetting the Water Heater
Temperature will appear on the Front Panel when the power is on.
Press (+) or (-) to set the desired temperature
Press (+) or (-) to switch the information type.
Press Reset to solve the problem.
If resetting does not solve the problem, refer to the troubleshooting section of the Operation or contact the service center.
Note
Setting over 125°F can cause scalding
Note
Measuring the Inlet Gas Pressure
Opened Closed
Shut off the manual gas valve.
Open a hot water faucet to turn on the unit.
Shut off the hot water faucet.
Remove 4 screws of the front cover assembly.
Loosen a screw two or three turns and connect a manometer to the pressure port.
Recommend Gas Pressure Settings:
NG : 3.5”~10.5” WC LP : 8.0”~13.5” WC
If not
Gas supply
Open
Re-open the manual gas valve.
Open several fixtures that have high flow rates.
Check the inlet gas pressure reading on the manometer.
Adjust the inlet gas pressure with gas regulator.
CAUTION The Navien water heater cannot operate properly without sufficient inlet gas pressure and volume. The instructions on how to check the inlet gas pressure are stated above.
THIS IS ONLY TO BE DONE BY A LICENSED PROFESSIONAL.
Installing the Front Cover Ensure maximum water flow
After using the first 10 minutes, please stop using it and clean the cold water filter and recirculation water filter of any trapped debris.
#### Final Check
A trial run should be performed in accordance with the Installation checklist found in the Installation Manual.