Navien NHB H Series, Инструкция по установке и эксплуатации

Страница: 114 / 143

114 Operating the Boiler
Press the Back button ( ) to return to the previous
screen or menu.
Item Description
1. Cascade System
Setting (For NHB-
110/150H models
only)
●
To enter the Cascade
Main setting mode,
select Start.
●
The setting mode is
entered and the IDs
of all boilers that can
communicate with the
Main via the RS485
communication line are
initialized.
●
The boilers whose IDs
are initialized by the
Main are set to <Sub
setting mode>, if you
press the OK button for
2 seconds or more, the
Main gives you the ID
and it is displayed on
the screen.
●
The Main periodically
checks the RS485
communication, and
when there is an ID
request from the Sub,
the ID is sequentially
incremented and
added to the Sub (1
to 16).
●
Select OK in the Main to
complete the cascade
setting, and the Main
and the assigned
Sub IDs will return to
<Normal operation
mode> and turn into
CASCADE ON state.
At this time, the Main
icon on the Main panel
lights up.
●
If the cascade setting
is idle for more than
1 hour, it returns to
<Normal operation
mode> and reverts to
CASCADE OFF state
automatically.
* The anti-fast cycling time is the duration that the boiler
stops its space heating operation when the space heating
supply or return temperatures reach the set values for
boiler operation stop temperatures. The boiler will not
resume space heating until the duration elapses, even
when the space heating supply or return temperatures
return to within the set ranges.
** Boiler Pump Delay is the duration the circulation pump
continues to run between the space heating supply
or return temperature reaching the set point and the
burner turning off. If the space heating supply or return
temperature remains outside of the boiler operation
temperature range for a set period, the pump stops for 10
mins, runs again for 5 mins, and then repeats the cycle.
11.13.4 Configuring a Cascade System
To view and configure the cascade settings, press
the Back button ( ) and the Menu button ( )
simultaneously for 3 seconds, and then select “4.
Cascade Status and Settings”.
Rotate the Command dial ( ) to switch between
the parameters or to increase/decrease setting
values. Press the Command dial ( ) to select a
parameter or to confirm after making changes.