Navien NPE-180A2 Installation Manual page 102

Category Item
1. External DHW
Tank Setting
2. Ext. Tank
Cascade Unit
On Temp Offset
5. External Tank
3. Ext. Tank
Cascade Unit
Off Temp Offset
102 Operating the Water Heater
Description
Set whether to
use an external
DHW tank.
Setting range:
●
Enable, Disable
Default:
●
Disable
Set the
temperature
to turn on an
external DHW
tank of a cascade.
Setting range:
●
Ext. Tank
Cascade Unit
Off Temp
Offset - 54 °F
(30 °C)
Default: 13 °F
●
(7 °C)
Set the
temperature
to turn off an
external DHW
tank of a cascade.
Setting range:
●
Ext. Tank Burn
On Temp
Offset - Ext.
Tank Cascade
Unit On Temp
Offset
Default: 9 °F
●
(5 °C)
3. Press the Back button (
AHU Communication
AHU Communication feature can be used when NPE
and thermostat are difficult to connect.
It can be used for AHU heating with a hot water
recirculation line.
Category Item
4. Ext. Tank Burn
On Temp Offset
5. External Tank
5. Ext. Tank Burn
Off Temp Offset
When you reset one of the following
Note
parameters, the corresponding
parameter will be reset automatically:
AHU Outdoor High or Low Temp
●
AHU SH MAX or MIN Set-point
●
Ext.Tank Cascade Unit On or Off
●
Temp Offset
Ext.Tank Burn On or Off Temp Offset
●
previous screen or menu.
AHU has an RS-485 communication
Note
function. Its communication protocol
has to match the NPE communication
protocol. Refer to "8.9 AHU Application
with RS-485 Communication (optional)"
on page 139 for piping diagram.
Description
Set the
temperature
to turn on an
external DHW
tank combustion.
Setting range:
●
Ext. Tank Burn
Off Temp
Offset - Ext.
Tank Cascade
Unit Off Temp
Offset
Default: 5 °F
●
(3 °C)
Set the
temperature
to turn off an
external DHW
tank combustion.
Setting range:
●
0 °F (0 °C) - Ext.
Tank Burn On
Temp Offset
Default: 0 °F
●
(0 °C)
) to return to the