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123
Operating the Boiler
Item
Description
4. Cascade
Protocol
Set the cascade protocol.
●
NPE or NR
●
Default : NPE
5. Number of
Oper-Unit
The number of units currently
operating in the cascade system.
6. Cascade
Info.
View the operating status of
individual units in the cascade
system.
7. Vent Type
Setting
Set the type of ventilation.
●
Default: If not in the cascade
system, the default setting is
Individual Vent.
Note
In the cascade system,
the default setting is
Common Vent.
8. Descaling
Reminder
Set the descaling reminder
internal.
●
Setting range: No Alarm, 6 Mon,
12 Mon, 24 Mon
●
Default: No Alarm
Note
This menu can only be
configured when the
NFC-H boiler is the main
unit of the cascade
system.
11.6.5 Setting the External Connection
To view and configure the external network
connection, press the Back button (
) and the
Menu button (
) simultaneously for 3 seconds,
and then select “5. External Connection”.
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.
Item
Description
1. Cascade
System
Setting
●
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.
2. Cascade
System
Removal
Select this option on the Main
unit of a cascade system to end
cascade operation.
●
Enter Cascade system setting
mode to reassign IDs and begin
a cascade system again.
●
If a Sub unit has a network
communication problem, select
this option on the Sub unit to
exclude the individual unit from
the cascade system.
3. Cascade
Init-operation
Unit
Set the initial number of activated
boilers.
●
Setting range: 0 – 16
●
Default: 0
Summary of Contents for NFC-250/175H
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