Display Navigation; Ignition Control - Sequence Of Events - Bradford White BNTH Installation And Operation Instructions Manual

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Brute Elite
SECTION 8.
Brute Elite Control Setup
and Operation
The Brute Elite control is an integrated electronic
control that replaces many of the individual components
found on older appliances. The control acts as the
ignition control, pump control, high limit and cascading/
lead lag control and is setup using the display on the
appliance.
Figure 31. Control Buttons on User Interface.

8.1 Display Navigation

The display is divided into three menu structures,
USER, SETUP and DIAGNOSTIC. The menu structure
and variables in each are shown in
in a particular menu structure navigation consists of
pressing the next button to scroll from item to item and
then pressing the up and down arrows to change values.
MENU ITEM
FUNCTION
Outlet water Displays the current outlet
temperature water temperature & allows
the setpoint to be adjusted
Inlet water
Displays the current inlet
temperature water temperature
Delta T
Displays the current
temperature rise across
the heat exchanger
DHW water
Displays the current DHW
temperature temperature & allows the
setpoint to be adjusted
Stack
Displays the current stack
temperature temperature
Outdoor
Displays the current outdoor
temperature air temperature
LL
Displays the current system 60-190°F
temperature and allows the
setpoint to be adjusted
Firing Rate
Displays an indicator of the
current firing rate based
upon fan RPM. The actual
firing rate may vary.
Table 12. User Mode Menu Structure.
Tables
12-14. Once
RANGE
DEFAULT
55-190°F
120°F
60-182°F
120°F
120°F
Once the value is adjusted the NEXT or DONE button
can be pressed. The DONE button returns you to the
Home screen. The NEXT button increments the display
to the next item in the menu structure.
USER mode is the home screen shown on the
control. If the display is not in USER mode wait for the
display timeout period to be reached or press the Done
button to return to the USER menu.
SETUP mode is accessed by holding the up and
down arrow keys simultaneously for 3 seconds.
DIAGNOSTIC mode is accessed by holding the
NEXT button for 3 seconds.
8.2 Ignition Control- Sequence of Events
1.
Call for heat
2.
Safety chain check
3.
Fan starts and waits to achieve prepurge RPM
MENU ITEM
DEFINITION
F or C
Selects temperature units
LBTHODLOD Outdoor reset enable/disable -
enables menu items
LBT
Low boiler setpoint during outdoor reset
see Figure 29
HOD
High outdoor temperature setpoint
see Figure 29
LOD
Low outdoor temperature setpoint
see Figure 29
RMT Add
Used for Lead/Lag (follow menus)
LL
Lead/Lag enable/disable - enables menu items
HS
Hysteresis - temp range between on/off cycles
bL
Base Load % - input rate before next boiler fires
Sd
Warm weather shut-down temperature
ASC
Anti short cycle - minutes of delay between
startup
bAC
Future use - Press DONE to exit menu.
PAS
Future use - Press DONE to exit menu.
When enabling/disabling functions, select "Done" and wait 30
NOTE:
seconds before scrolling.
Table 13. Setup Mode Parameters.
MENU ITEM
DESCRIPTION
mA
Display the flame sense signal
Alert codes
Displays the current alert code
Lockout code
Displays the current lockout code
Outlet Limit
Displays outlet temperature limit
DHW limit
Displays Domestic Hot Water limit setting
Stack Limit
Displays Stack limit setting
Min. firing rate
Displays the minimum firing rate allowed
Min. forced
Allows the user to force the boiler to fire at
firing rate
the minimum firing rate
Max forced
Allows the user to force the boiler to fire at
firing rate
the maximum firing rate
Rate indicator
Displays a indicator of the firing rate based
off of the fan RPM. Actual firing rate may
vary depending upon setup.
Table 14. Diagnostic Mode Menu Structure.
Page 37

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