Brute Elite BNTH1000, Installation And Operation Instruction Manual, Page: 6 / 141

Page 2
Bradford White Corp.
1.2 about the Brute elite Control
System
This unit includes an advanced control system
which can perform many functions. This is part of
the reason why the Brute Elite 1000 or 1700 can
deliver such outstanding performance. There are
several “branches” in the control software, and many
different display screens. For clarity, throughout
this manual we have made a special effort to show
you how to reach each of the important setup and
operating functions. We have done this in two ways:
•
In many cases, we have shown you the actual
screen display you will see while performing a
function.
• Sometimes, instead of showing the screens, we
have just listed the series of choices you should
make in order to reach the section you want.
The arrangement of the control software is actually
quite logical, and after you have worked with it a bit,
you will not have any problems “finding your way
around.” We just want to give you some help with
the first part of the process, when you are “getting
used to” the control system.
Later in this manual, we will detail information on
the setup and operating procedures. There are a
couple of concepts you will need to understand right
from the start.
•
Each boiler has two controllers and two
burners, as shown in Fig. 1. A single Operator
Interface is used to communicate with both
controllers.
Primary
burner Primary
controller
Gas
valve
Gas
valve
Secondary
controller
Secondary
burner
Operator
interface
Boiler 1
fig. 1 – Control arrangement in a Single-Boiler
Installation
Each controller and burner work together. Each
boiler includes two of these controller/burner
combinations.
Notice the different terms we are using here.
The term
boiler
refers to the whole unit – the
complete Brute Elite 1000 or 1700. Each
boiler includes two separate
controller/burner
pairs
.
• Brute Elite 1000 and 1700 units are always set
up for “Lead/Lag” operation. The term “Lead/
Lag” means that, as the heating load increases,
the control system brings additional burners on
automatically.
On a multiple-boiler installation, each of the
individual boilers is still set up as shown in Fig.
1 above. The controller/burner pairs on all of the
boilers are arranged in a “daisy chain.” Up to four
boilers, with up to eight controller/burner pairs, can
be connected in this way. See Fig. 2.
fig. 2 – lead/lag arrangement in a multiple-
Boiler Installation
In a multiple-boiler installation, just one of the
operator interfaces is active. It can communicate
with all of the controller/burner pairs in the system,
so it displays information from all of the burners. A
single system sensor provides the control input for
the system.
Actually, even a Brute Elite 1000 or 1700 unit set
up as a single boiler still uses Lead/Lag operation.
If the heating load becomes too great for the first
burner, the control system automatically starts the
Press here to
see current
Lead/ Lag
performance
Press here
for individual
controller/
burner pairs
Press here
for Lead/ Lag
setup
Press here for
system setup
Operator
interface
Boiler 1
Slave 4
Boiler 2
Slave 3
Slave 2
Lead Lag
Master and
Slave 1
Slave 6
Boiler 3
Slave 5
Slave 8
Boiler 4
Slave 7
Addr
1
Addr
2
Addr
3
Addr
4
Addr
5
Addr
6
Addr
7
Addr
8