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Navien Commercial water heater NWP500 Series

Navien Water heating products Commercial water heater Repair, maintenance, and replacement planning
Navien NWP500 Series product image

Technical Specifications

Product Specs

  • Brand: Navien
  • Model or series: NWP500 Series
  • Equipment type: Commercial water heater
  • Product group: Water heating products
  • tankless water heater
  • combi boiler
  • System role: Water-heating equipment for domestic or commercial hot-water loads
  • Application: Commercial, light-commercial, or managed-building HVAC and water-heating applications
  • Compatibility check: Verify fuel type, venting, electrical requirements, capacity, controls, and installation clearances.
  • Verified source: navieninc.com

Useful troubleshooting details

  • Confirm the packaged unit model, serial number, tonnage, voltage, refrigerant or fuel type, control setup, access location, and service history.
  • Share no-heat, no-cooling, weak airflow, alarms, control issues, tenant comfort complaints, condensate, or unusual noise.
  • For planning, include business hours, rooftop or mechanical access notes, tenant impact, replacement timing, and maintenance history.

Troubleshooting

Error Codes

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E096 Equipment control

Abnormal upper electric heater operation

Record the Navien code, check visible intake, exhaust, filter, thermostat, controller, and clearance conditions without opening panels, and schedule service if the condition remains.
E097 Equipment control

Abnormal lower electric heater operation

Record the Navien code, check visible intake, exhaust, filter, thermostat, controller, and clearance conditions without opening panels, and schedule service if the condition remains.
E326 Water flow / hydronics

Dry fire condition

Record the Navien code, avoid repeated reset attempts, and schedule GreenFlow service.
E407 Temperature / sensor

Hot water outlet temperature sensor issue

Record the Navien code, check visible intake, exhaust, filter, thermostat, controller, and clearance conditions without opening panels, and schedule service if the condition remains.
E445 Water flow / hydronics

Abnormal mixing valve operation

Record the Navien code, check visible intake, exhaust, filter, thermostat, controller, and clearance conditions without opening panels, and schedule service if the condition remains.
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Service planning

How GreenFlow handles NWP500 Series requests

1

Identify the equipment

Confirm the model or series name, serial number if available, photos, and whether the unit is roof, exterior, basement, or mechanical-room equipment.

2

Describe the service issue

Share no heat, no cooling, weak airflow, error codes, alarms, leaks, noise, control problems, or comfort complaints.

3

Review access and history

Include access notes, tenant or business-hour constraints, filter status, recent repairs, and maintenance records when available.

4

Plan the next step

GreenFlow can route the request for diagnostics, repair planning, maintenance, replacement scope, or related system upgrades.

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Our Happy Customers

Dev W.

I had a breakdown of my cooling system and Hanna at Green Flow responded to my request right away. They scheduled me same day. The team at Green Flow was easy to communicate with over phone and text. They kept me updated on delays on arrival of the...

Melissa S.

The repair person came quickly and was super efficient and polite, and showed me what to do next time. He gave my dog a quick pay and was off again.

Sharad W.

Green Flow and the people who work there are terrific. Vlad and Andre are excellent. Andre was very helpful. He was punctual, respectful, efficient and knowledgeable. He did not try to sell me something I didn’t need ( as others have done before). I was charged $99 which...

Jack B.

Andrey always does a great job.

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