Version 2.21
22 NPE Service Manual
●
10-switch Panel:
Switch Function
Setting
Remark
“A” models
(NPE-180A/ 210A / 240A)
“S” models
(NPE-150S/180S/210S/240S)
DIP switch setting
1-3
Recirculation
Mode- Internal
Navien Pump
("A" models 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.
●
When installing an NPE
water heater with NR,
NP or CH series units
for a cascade system,
temperatures are displayed
in Fahrenheit only.
●
For NPE“S” models,
preheating is not available
when using a cascade
configuration.
**
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 2,000 ft (610 m), the
water heater will de-rate by
4% for each 1,000 ft (305 m)
of altitude gain.
Internal Recirculation
No Recirculation
1-ON; 2-OFF; 3-OFF
External Recirculation
No Recirculation
1-OFF; 2-ON; 3-OFF
Intelligent Preheating*
No Recirculation
1-ON; 2-ON; 3-OFF
Recirculation
Mode-
External Pump
Connected**
External Pump Only
1-OFF; 2-OFF; 3-ON
External Recirculation
External Pump Only
1-ON; 2-OFF; 3-ON
External Recirculation
External Pump Only
1-OFF; 2-ON; 3-ON
Intelligent Preheating*
Intelligent Preheating*
(External Pump Only)
1-ON; 2-ON; 3-ON
4
Display
Temperature Unit
Celsius (with L/M)
4-ON
Fahrenheit (with GPM)
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***
Off
7-OFF; 8-OFF
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 ****
(Applies to Main
PCB version V1.4
(July 11, 2013) or
later versions only)
0 ~ 1,999 ft (0 ~ 609 m)
9-OFF, 10-OFF
2,000 ~ 5,399 ft (610 ~ 1,645 m)
9-ON, 10-OFF
5,400 ~ 7,699 ft (1,646 ~ 2,346 m)
9-OFF, 10-ON
7,700 ~ 10,100 ft (2,347 ~ 3,078 m)
9-ON, 10-ON
