110 Operating the Boiler
When Installing the Cascade System
When using the recirculation feature in the cascade
system, you can choose commands in the menu
to preheat according to the set DHW temperature.
(Refer to “8.2 Cascade System - Recirculation System
Application Example” for details on installing.)
Note
For water heater(s) that are connected to
the recirculation line, each unit must be
set to the proper recirculation mode.
Item
Description
1. Always On
Set to repeat DHW Recirculation
(default).
2. Weekly*
The user can choose commands
for DHW Recirculation on a weekly
basis.
1. 1 Day: Schedule a command
for the week.
2. 3 Day: Schedule commands
for Weekdays, Saturdays, and
Sundays.
3. 7 Day: Schedule commands for
each day of the week.
* To choose this option you must set up the Time setting in
the Configuration menu.
External Recirculation
When using the External Recirculation feature, you
can choose commands in the menu to preheat
according to the set DHW temperature.
Item
Description
1. Always On
Set to repeat DHW Recirculation.
2. Intelligent* Set to detect DHW use for a week
and repeat the detected cycle.
3. Weekly*
The user can choose commands
for DHW Recirculation on a weekly
basis.
1. 1 Day: schedule a command
for the week.
2. 3 Day: schedule commands
for Weekdays, Saturdays, and
Sundays.
3. 7 Day: schedule commands for
each day of the week.
4. Aquastat
Set to use an aquastat for DHW
Recirculation.
5. HotButton
(Manual)
Set to use HotButton Push Buttons
to activate Recirculation.
* To choose this option you must set up the Time settings
in the Configuration menu.
Note
If there is a SH Demand signal during
external recirculation, pre-heating will
take priority, and space heating will start
afterwards.
Summary of Contents for NCB-190/060H
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