36 Installing the Water Heater
10-switch Panel:
Switch Function Setting Remark
1-3
Recirculation Mode-
Internal Navien
Pump ("A" model
only)
No Recirculation 1-OFF; 2-OFF; 3-OFF * Intelligent Preheating:
Learns the user's hot water
usage patterns and starts
preheating prior to an
anticipated draw.
Preheating starts when
remote controller is not
connected.
When remote controller is
connected, preheating starts
and operates based on the
timer.
Set the timer on the remote
controller to use hot water
at the time of your choice.
Intelligent preheating does
not function in Cascade
Mode (Preheating OFF).
Freeze protection is still
available with preheating
OFF.
**External Pump:
These settings are to be used
when an external pump is
wired to the water heater.
***Lime Alarm:
Displays a "760" error when
the set time period has been
reached to indicate a flush or
service is necessary.
****High Altitude
Above 2,000ft (610m), the
water heater will de-rate by
4% for each 1,000ft (305m) of
altitude gain.
Internal Recirculation 1-ON; 2-OFF; 3-OFF
External Recirculation 1-OFF; 2-ON; 3-OFF
Intelligent Preheating* 1-ON; 2-ON; 3-OFF
Recirculation Mode-
External Pump
Connected**
External Pump Only 1-OFF; 2-OFF; 3-ON
Internal Recirculation ("A" model only) 1-ON; 2-OFF; 3-ON
External Recirculation ("A" model only) 1-OFF; 2-ON; 3-ON
Intelligent Preheating* 1-ON; 2-ON; 3-ON
4
Display Temperature
Unit
Celsius 4-ON
Fahrenheit 4-OFF
5 Well Pump
Well Pump Operation 5-ON
Do Not Use Well Pump 5-OFF
6
DHW Storage Tank/
Solar System
Storage Tank/Solar System Operation 6-ON
Do Not Use Storage Tank/Solar System 6-OFF
7 & 8 Lime Alarm***
6 Months Alert 7-ON; 8-OFF
12 Months Alert 7-OFF; 8-ON
24 Months Alert 7-ON; 8-ON
9 & 10 High Altitude ****
01,999 ft (0609 m) 9-OFF, 10-OFF
2,0005,399 ft (6101,645 m) 9-ON, 10-OFF
5,4007,699 ft (1,6462,346 m) 9-OFF, 10-ON
7,70010,100 ft (2,3473,078 m) 9-ON, 10-ON
Note
This water heater may be installed at elevations up to 10,100 ft (3,078 m) for use with Natural Gas and 4,500 ft (1,370 m) for use
with 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 ComfortAir+ add-on controller.
DHW recirculation and Navien ComfortAir+ configurations cannot be used at the same time.
2-switch Panel:
Switch Function Setting
1 Cascade Vent
Common Vent 1-OFF
Individual Vent 1-ON
2 Gas Type
Natural Gas OFF
Propane Gas ON
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