Product Information - Navien NPE-180A Service Manual

CAUTION
Do not attempt to repair or replace any part of the water
●
heater, unless it is specifically recommended in this
manual.
For all other service, contact an authorized technician or
licensed professional. Improper adjustments, alterations,
service, or maintenance may lead to property damage,
personal injury, or death and will void your warranty.
Do not operate the water heater if you feel something is
●
wrong with it.
Doing so may result in product damage or personal injury.
Do not allow children to operate or access the water
●
heater.
Doing so may result in product damage or personal injury.
Do not attempt to change the water temperature while
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the water heater is being used.
Doing so may result in personal injury.
Do not turn on the water heater unless the water and gas
●
supplies are fully opened.
Doing so may damage the water heater.
Do not turn on the water if the cold water supply shut-
●
off valve is closed.
Doing so may damage the water heater.
Do not use this water heater for anything other than its
●
intended purpose, as described in this manual.
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.
When servicing the controls, label all wires prior to
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disconnecting them.
Failure to do so may result in wiring errors, which can lead to
improper or dangerous operation.
Do not use unapproved replacement or accessory parts.
●
Doing so may result in improper or dangerous operation
and will void the manufacturer's warranty.
Do not place anything in or around the vent terminals,
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such as a clothes line, that could obstruct the air flow in
or out of the water heater.
This water heater has been approved for use in the USA
●
and Canada only.
Using the water heater in any other country will void the
manufacturer's warranty.
Should overheating occur or the gas supply fail to shut
●
off, turn off the manual gas valve to the appliance.
Do not use this appliance if any part has been under
●
water.
Immediately call a qualifed service technician to inspect the
appliance and to replace any part of the control system and
any gas control which has been under water.
12 NPE Service Manual

2. Product Information

2.1 Product Information
Navien features the new NPE "A" Series tankless gas water heater
with a built-in Circulation Pump and Mini Buffer Tank (the NPE "S"
series tankless gas water heater features a built-in Mixing Valve).
Depending on the heat capacity, each model is divided into four
types; 150,180,210 and 240.
Items
"A" Models
(NPE-180A/210A/240A)
Intended Use Residential, Commercial or Combi*
Built-in Circulation
Features Pump and Mini Buffer
Tank
Factory
Default
Temperature
Gas Type NG, field-convertible to LP
See "3.1 General Specifications" for detailed specifications.
* "Combi" refers to a combination potable water and space heating
application. These water heaters cannot be used in space heating-only
applications.
NPE
"S" Models
(NPE-150S/180S/
210S/240S)
Built-in Mixing Valve
120 °F (49 °C)
Version 2.21