Navien NPN Installation & Operation Manual page 30

Pump Cycle Interval Time Settings Mode
(P.12)
1. When the P.12 item is displayed on the
<PARAMETER INFORMATION MENU MODE>
segment, press the [Info] button once to enter
the <Preheat Pump Output Time Settings
Mode>.
2. Once you enter the mode, enter the parameter
values and the item will start to flash.
3. Press the [+] or [-] button in the <Preheat Pump
Output Time Settings Mode> to change the
value of the PARAMETER.
4. The set item is sent to the controller when you
press the [Info] button once or if there is no key
input for 10 seconds. If it has been sent properly,
the last selected item is set and will start to flash.
5. Press the [Reset] button once to return to the
<PARAMETER INFORMATION MENU MODE> (to
the previous item of display).
6. If there is no key input for 5 minutes, it is
automatically returned to the <PARAMETER
INFORMATION MENU MODE>
(to the previous item of display).
Items Description
Set the maximum time
1-120 for pump operation or
(Unit: 1 min), on-demand operation.
maximum (Default: 20 min,
5 min with maximum 5 min with
optional optional HotButton Kit.)
HotButton If Cascade is set, the Sub
Kit unit will be fixed with the
Main unit value.
Pump Sampling Time Settings Mode
(P.14)
Items
1-120
(Unit: 1 min)
Differential OFF Temp Settings Mode
(P.15)
Items
5 °F (3 °C) –
54 °F(30 °C)
[Unit: 1 °F
(0.5 °C)]
Not
Display
available
Description Display
Set the pump to
periodically cycle ON.
(Default: 30 min)
If Cascade is set, the Sub
unit will be fixed with the
Main unit value.
Description Display
Set the offset
temperature to turn
OFF the preheating
operation. [Default: 9 °F
(5 °C)]
If Cascade is set, the Sub
unit will be fixed with the
Main unit value.
Setting is not available
with the optional
HotButton Kit.
Installing the Water Heater 29