Bradford White BNTH-750 Manuel utilisateur

BNTH-750
Bradford White
Marque
Bradford White
Modèle
BNTH-750
Taper
Manuel utilisateur
User’s Manual Document 1345A
WARNING
If the information in this manual is not
followed exactly, a re or explosion may
result causing property damage, personal
injury or loss of life.
Do not store or use gasoline or other
ammable vapors and liquids in the vicinity
of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
nearby phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call
the re department.
Installation and service must be performed
by a qualied installer, service agency, or gas
supplier.
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
qualied in hot water boiler and heater installation and maintenance. Improper installation and/or operation
could create carbon monoxide gas in ue gases which could cause serious injury, property damage, or
death. Improper installation and/or operation will void the warranty.
AVERTISSEMENT
Assurez-vous de bien suivres les instructions
données dans cette notice pour réduire au
minimum le risque d’incendie ou d’explosion ou
pour éviter tout dommage matériel, toute blessure
ou la mort.
Ne pas entreposer ni utiliser d’essence ni
d’autres vapeurs ou liquides inammables dans
le voisinage de cet appareil ou de tout autre
appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:
• Ne pas tenter d’allumer d’appareils.
• Ne touchez à aucun interrupteur. Ne pas vous
servir des téléphones dansle bâtiment où vous
vous trouvez.
• Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions
du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de
gaz, appelez le sservice des incendies.
L’installation et l’entretien doivent être assurés par
un installateur ou un service d’entretien qualié ou
par le fournisseur de gaz.
User’s Manual for
with Touchscreen Display
Modulating Boiler
Model BNTH
Sizes 285–850 MBTU/h
Water Heater
Model BNTV
Sizes 150-850 MBTU/h
H2374800A
Brute
TM
Indoor
Outdoor
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CONTENTS
Familiarizing yourself to the Brute .....................................1
FOR YOUR SAFETY,
PLEASE READ THIS BEFORE OPERATING .................2
What to Do If You Smell Gas .............................................2
POUR VOTRE SÉCURITÉ,
LISEZ AVANT DE METTRE EN MARCHE ........................2
Que Faire si Vous Sentez une Odeur de Gaz ......................2
Lighting the Unit ................................................................. 3
Turning Off the Gas to the Unit ..........................................3
Instructions de Mise en Marche .......................................... 4
Fermeture de l’Alimentation en Gaz ................................... 4
Shutting Down the Brute ....................................................5
Restarting the Brute ............................................................5
In the Event of Power Failure .............................................5
USING THE TOUCHSCREEN .......................................... 6
Login ...................................................................................7
Verication Process for Safety Parameters .........................8
Checking Individual Parameters .........................................9
Setting the Date & Time ...................................................10
The Conguration Menu ...................................................11
The Conguration Sub-Menus .................................... 12-14
Outdoor
Indoor
DOOR
HANDLE
(PULL TO OPEN)
(RELEASE BOTH LATCHES
TO OPEN)
DOOR
LATCHES
ON / OFF
SWITCH
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BOILERS AND VOLUME WATER HEATERS
FAMILIARIZING YOURSELF TO THE
Brute
TM
Shown without front, top and side panels.
Sizes available are 150-850 MBTU/h. This illustration is of the 150 MBTU/h
For complete details to all sizes and dimensions, please refer to the Brute Install and Operating Manual, Doc #1344
Outdoor Model
Shown without back panel.
(has all piping connections in
the BACK)
(has all piping connections
on the TOP)
Indoor Model
AIR PRESSURE
SWITCH
AIR INLET CONNECTION
EXHAUST VENT
CONNECTION
GAS
CONNECTION
GAS
CONNECTION
TOUCHSCREEN
HEAT
EXCHANGER
VENTURI
AIR/ GAS
BLOWER
PRESSURE
RELIEF VALVE
WATER INLET
WATER OUTLET
AIR INLET
FILTER BOX
DRAIN VALVE
CONDENSATE TRAP
GAS VALVE
ON / OFF
SWITCH
The Bradford White Brute is offered in both Indoor and
Outdoor models for all sizes, as both Boiler and Volume Water
Heater. The appearance of the Indoor and Outdoor Brutes is
drastically different as the Outdoor model has a weathertight
door that covers the entire front of the unit. This weathertight
door must be unlatched, lifted off, and set aside for all
adjustments and servicing.
The only component and interior difference between the
Indoor and Outdoor models is that all of the piping for the
Outdoor model, with the exception of the Exhaust Vent, is at
the BACK of the unit. See Figure 1
The gas connection, the air inlet, and the water inlet and
outlet are all at the back of the outdoor unit. This is consistant
for all sizes.
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FOR YOUR SAFETY -
PLEASE READ THIS BEFORE OPERATING
WARNING
If you do not follow these instructions exactly, a re or explosion may result,
causing property damage, personal injury or loss of life.
A. This unit does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do
not try to light the burner by hand.
B. Before operating the unit, check for any smell of gas in the area around it. Be sure to smell next to the oor,
because some gas is heavier than air and will settle near the oor.
C. Use only your hand to turn the handle on the gas valve. Never use tools. If the valve handle will not turn by
hand, don’t try to repair it. Call a qualied service technician. If you force the valve or try to repair it, this
may result in a re or explosion.
D. Do not use this unit if any part has been under water. Immediately call a qualied service technician to inspect
the unit. Any part of the control system or any gas control which has been under water must be replaced.
WHAT TO DO IF YOU SMELL GAS
· Do not try to light any appliance or device that uses gas.
· Do not touch any electrical switch. Do not use any phone in your building.
· Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
· If you cannot reach your gas supplier, call the re department.
POUR VOTRE SÉCURITÉ,
LISEZ AVANT DE METTRE EN MARCHE
AVERTISSEMENT
Quiconque ne respecte pas à la lettre les instructions dans la présente notice risque un
début d’ incendie ou une explosion entraînant des dommages, des blessures ou la mort.
A. Cet appareil est muni d’un dispositif d’allumage qui allume automatiquement la veilleuse. Ne tentez pas
d’allumer la veilleu manuellement.
B. Avant de faire fonctionner, reniez tout autour de l’appareil pour déceler une odeur de gaz. Reniez près du
plancher, car certains gaz sont plus lourds que l’air et peuvent s’accumuler au niveau du sol.
C. N’utilisez que votre main pour fermer la soupape d’arrêt de gaz. N’utilisez jamais d’outils. Si la poignêe de
la valve ne tourne pas manuellement, ne tentez pas de la réparer. Communiquez avec un technicien de service
qualié. Le fait de forcer ou de tenter de réparer la poignée pourrait causer un incendie ou une explosion.
D. N’utilisez pas cet appareil s’il a été plongé dans I’eau, même partiellement. Faites inspecter I’appareil par un technicien
qualié et remplacez toute partie du système de contrôle et toute commande qui ont été plongées dans I’eau.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ
· Ne pas tenter d’allumer d’appareil.
· Ne toucher à aucun interrupteur; ne pas vous servir des téléphones se trouvant dans le bâtiment.
· Appelez immédiatement votre fournisseur de gaz depuis un voisin. Suivez les instructions du fournisseur.
· Si vous ne pouvez rejoindre le fournisseur, appelez le service des incendies.
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BOILERS AND VOLUME WATER HEATERS
LIGHTING THE UNIT
1. STOP! Read the safety information listed above.
2. Set the thermostat to the lowest setting.
3. Turn off all electric power to the unit.
4 This unit is equipped with an ignition device which automatically lights the burner.
Do not try to light the burner by hand.
5. Remove the front access panel.
6 Turn off the manual gas valve. The valve is off when the valve handle is at a right
angle to the gas pipe.
7. Wait ve minutes to allow any gas to clear. Smell for gas, including the area near
the oor. If you do smell gas, STOP! Follow Step B in the safety information listed
above. If you don’t smell gas, go to the next step.
8. Slowly turn the manual gas valve to “ON.” The handle on the valve will be parallel
to the gas pipe.
9. Replace the front panel.
10. Turn on the electric power to the unit.
11. Set the thermostat to the desired setting.
12. If the unit will not operate, follow the instructions in “Turning Off the Gas to the
Unit” and call your service technician or gas supplier.
Gas inlet
Manual gas valve
shown in the
Off position
TURNING OFF THE GAS TO THE UNIT
1. Before doing any service work, turn off all electric power to
the unit.
2. Set the thermostat to the lowest setting.
3. Remove the front access panel.
4. Turn off the manual gas valve. The valve is off when the
valve handle is at a right angle to the gas pipe.
5. Replace the front panel.
Manual Gas Valve
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INSTRUCTIONS DE MISE EN MARCHE
1. ARRÊTEZ ! Lisez les instructions de sécurité sur la portion supérieure.
2. Réglez le thermostat à la temperature la plus basse.
3. Coupez l’alimentation électrique de l’appareil.
4. Cet appareil est dote d’un dispositif d’allumage qui allumera automatiquement le
brûleur. Ne tentez pas d’allumer le brûleur manuellement.
5. Retirez le couvercle avant.
6. Mettez la soupape d’ arrêt de gaz à „OFF”. La valve est en position „OFF” lorsque la
poignée se trouve à angle droit du tuyau de gaz.
7 Attendez cinq minutes an que le gaz se dissipe. Si vous croyez sentir une odeur de
gaz, ARRÊTEZ ! Reportez-vous aux instructions B ci-dessus, sur cette étiquette. S’il
n’y a pas d’odeur de gaz, passez à la prochaine étape.
8. Remettez lentement la soupape d’arrêt de gaz en position „ON”. La poignée sera
parallèle au tuyau de gaz.
9. Replacez le couvercle avant.
10. Rétablissez l’alimentation électrique à l’appareil.
11. Réglez le thermostat à la température désirée.
12. Si l’appareil ne fonctionne pas, suivez les directives relatives à la fermeture de
l’alimentation en gaz et communiquez avec votre technicien de service ou le
fournisseur de gaz.
Entrée
de gaz
Valve de gaz manuel le se
trouvant en position„OFF”.
FERMETURE DE L’ALIMENTATION EN GAZ
1. Coupez toute alimentation électrique à l’appareil si celui-
ci doit faire l’objet d’un entretien.
2. Réglez le thermostat au réglage le plus bas.
3. Retirez le couvercle d’accès au panneau de commande.
4. Mettez la soupape d’arrêt de gaz à „OFF”. La valve est
en position „OFF“ lorsque la poignée se trouve à angle
droit du tuyau de gaz.
5. Replacez le couvercle d’accès au panneau de commande.
Valve de Gaz Manuel
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BOILERS AND VOLUME WATER HEATERS
SHUTTING DOWN THE BRUTE
It may sometimes be necessary to shut down the Brute. Here are the steps required to do
this:
1. Switch off the main electrical disconnect switch.
2. Open the front cover and close the main manual gas valve.
3. If freezing is anticipated, drain the Brute. (Also be sure to protect the piping in the
building from freezing.)
The steps listed above may require qualied service personnel.
RESTARTING THE BRUTE
It may be necessary to restart the Brute – for example, after a power interruption. Here are
the steps required to do this:
1 Reset any errors using the Touchscreen Display. See the section on “About Lockouts,
Holds, and Alerts.”
2 Turn up the thermostat to call for heat.
3. In approximately 2 seconds, the blower will operate. Ignition should occur after 35-40
seconds. It may take as long as 2-1/2 minutes.
4. If ignition does not occur, wait 5 minutes and then repeat steps 1 through 3.
5. If, after three attempts, the unit still does not light, shut down the boiler and call your
service technician.
If the unit has been drained, follow these steps:
1. See the “Installation and Operation Manual” for instructions on lling and purging the
unit.
2. Remove the front door. Turn on the gas shutoff valve.
3. Switch on the main electrical disconnect switch. The pump and blower will start, and
the igniter will be energized. After 35 seconds the gas valve will be energized, and
ignition will occur. If ignition does not occur within 2-1/2 minutes switch “off” the
main disconnect switch, wait 5 minutes and switch it “on” again. If after three attempts
ignition does not occur, shut down the unit and call for service.
IN THE EVENT OF POWER FAILURE
The Brute will not operate during an electrical power outage. If there is an extended power
outage with danger of freezing, then the Brute (and all other water systems) should be
completely drained. Before draining the unit, turn off the gas and turn off the main power
switch. When you replace the unit in service, refer to the “Installation and Operation
Manual” for instructions on lling and purging.
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HIGH EFFICIENCY COMMERCIAL BOILERS AND VOLUME WATER HEATERS
Figure 39. Brute with Touch Screen
Touch Screen
The Touch Screen
on OUTDOOR
units is located
behind the front
panel.
Section 8
Using the Touch Screen
8.1 The Touch Screen
The Touch Screen is located front and center on
the Brute and allows you to navigate into all of the
functionality and control that is available to setup and
customize your heating and/or hotwater system.
8.2 Using the Touch Screen
A screen saver is programmed into the display. Simply
touch the screen to wake it up.
While under normal operation, the Touch Screen will
automatically present this Home Screen. See Menu 1
Menu 1. Home Screen
Menu 2. Status Summary
e home screen shows a picture of the Brute
controller.  e color of the controller depends on the
status of the Brute, as shown below.
Color Status Control
Icon
Blue Normal operation
Red Lockout
Gray Standby mode (Burner
switch o )
Gray and
crossed
out
Communication
problem
Yel l ow Hold state.  is could
be Anti short cycle, fan
speed transitions, etc.
Figure 40. Boiler Status Colors
To check the operation of the appliance, press the large
Control Icon on the Home screen. The system will
present a Status Summary screen for the appliance:
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BOILERS AND VOLUME WATER HEATERS
Display This area displays several different kinds of
information, including current operating information,
setup parameters, and messages from the system.
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Screen Menu Icons
There are several icons at the top of the Touch Screen
Menus (and most of the other screens) that will help
you move around the system:
Home Upper left-hand
corner
Return to Home page
Camera Upper left-hand
corner
Screen-shot of current
menu as a JPG  le
Bell Upper left-hand
corner
System in Lockout,
Reset required
Padlock Upper right-hand
corner
Locked or Unlocked.
Back Upper right-hand
corner
Return to previous
Sometimes a screen is used to present a list, and often
the list is too long to present on a single screen view. To
see the rest of the list, pull down on the bar on the right
side of the screen, or use the up- and down-arrows.
To make a change, or to get more information about one
of the items on the list, press on the line for that item.
8.3 Login (required for some parameters)
To change some parameters, a Login (password) is
required. The control system includes three levels of
password protection:
OEM Factory Password Setup and
parameter changes Available only to the
factory.
Login Installer Password
Setup and parameter changes made when
the system is installed, and some diagnostic
and troubleshooting functions.
The installer level password is “lnt” (lower
case “LNT.”) See Menu 3
User (no password required)
Non-critical adjustments and functions,
including adjusting the Central Heat and
Domestic Hot Water setpoints, monitoring
the input and output variables, reading
parameters from the controller, and reading
the error log
(For some special safety-related functions, besides
entering the correct password, the system will
ask you to go through an additional “veri cation”
process. For more information, see the section on
“Con guration.”)
When a password is necessary, the system will
present the keyboard screen. See Menu 3.
Menu 3. Keyboard Screen
The passwords used by this system are “case
sensitive” – it matters whether a letter in the
password is capitalized or not. Pressing the Shift
key toggles between capital and lower case letters.
“BS” stands for “Back Space,” and also works as a
Delete key.
Anyone can view all of the parameters. However,
to change most of the parameters, you will need a
password.
At the bottom of the screen, the system indicates that
you need to enter a password.
Menu 4. Login Required
The screen used to Login is similar to the Keyboard
screen.
It may be dif cult for some operators to press the
keys on this screen. In this case, use the back of a
plastic pen, or a stylus, or a pencil eraser. (Do not
use sharp metal tools – these may damage the plastic
surface of the screen.)
lnt
See Menu 3
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HIGH EFFICIENCY COMMERCIAL BOILERS AND VOLUME WATER HEATERS
Each time you press a key, the system will respond
with a beep. If you are entering a password, an
asterisk (*) will appear for each character you enter.
The beeps and asterisks will help you enter the correct
number of characters for your password.
When changing a numerical value, the system presents
a numerical entry screen, as shown below.
Menu 5. Numeric Entry Screen
8.4 Veri cation Process for Safety-
Related Parameters
The veri cation process allows the user to
con rm that all the changes made are correct
and that there have not been any inadvertent
changes made.
1. When you start to change a parameter that
is related to safety, the system will present a
warning which looks like this:
Menu 6. Parameter Safety Warning
WARNING
Changing safety parameters should only be
conducted by experienced, licensed boiler operators
and mechanics. Hazardous burner conditions can
happen with improper operations that may result in
PROPERTY LOSS, PHYSICAL INJURY, or DEATH.
Press OK to continue. The system will ask you
to login before you make a change. (For more
information on logging in, see Section 8.2.)
2. If you make a change in any group that could
affect the safe operation of the unit, the control
system will ask you to “verify” the change before
it is accepted.
3. Once all parameters have been changed, return
to the con gure menu. In the lower right hand
corner of the screen you will see ‘VERIFY’
Press VERIFY, then press BEGIN to start
veri cation.
Notes –
• Once you change one of these safety-related
parameters, you must nish the veri cation process
for the group that includes the parameter, or the
control system will not let the boiler operate. You
can wait to do the veri cation until you have changed
parameters in other groups, but before you return the
boiler to service, you must complete the veri cation
process for all groups that have been changed.
• At the end of the veri cation process, you must press
the Reset button on the front of the controller. See
Figure 41. You have to do this within 30 seconds, or
the veri cation will be cancelled. To make it easy to
reach the Reset button, open the door on the front
of the boiler and slide out the control panel before
beginning the veri cation.
Figure 41. Reset Button on Controller
4. The system will present a listing for each group
of parameters that need veri cation
See Menu 7.
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Menu 7. Safety Parameter Con rmation
5. For each group, check the list carefully. Press
Yes if all of the parameters in the group have
been entered correctly. For each group, you are
given 30 seconds to select Yes/No.
A count-down timer is shown at the bottom of
the screen.
If you made changes in other safety-related
groups, verify the entries in those groups in the
same way. Do this until the following screen
shows
Menu 8. Safety Parameter Reset
6. When the process is complete, the system will
tell you to reset the control system. The Reset
button is located on the front of the controller.
You must press the Reset button within 30
seconds, or the veri cation will be cancelled. A
count-down timer is shown at the bottom of the
screen.
8.5 Checking Individual Parameters
1. From the ‘Home’ screen (Menu 9), press the
icon for the controller.
Menu 9. ‘Home’ screen
2. The Status Summary page for the controller
will appear. This shows the current operating
condition of the controller, and also shows some
of the con guration settings.
See Menu 10
Menu 10. Status Summary Screen
Notice the four buttons at the bottom of each
Status Summary screen:
• Con gure – Allows an installer to change
some of the setup parameters used by the
system. A password may be required.
• Operation – Used to adjust the setpoints,
change the fan speed, turn a burner on or off,
or turn the pumps on or off.
• Diagnostics – Allows you to run diagnostic
tests, or check the inputs and outputs used by
the system.
• Details – Allows you to check the status of all
of the setup parameters on the control system.
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HIGH EFFICIENCY COMMERCIAL BOILERS AND VOLUME WATER HEATERS
8.6 Setting the Date and Time on the
System Display
The display includes an internal clock, which keeps
track of the date and time. This setting is important,
because log entries for Lockouts and Alerts include
time listings. If the Date and Time setting for the
boiler is not correct, the listings in the Lockout and
Alert logs will be incorrect.
To set the clock:
1. Start at the ‘Home’ screen.
Menu 11. ‘Home’ screen
2. Press the Setup button on the lower right
corner of the screen. The system will present
the Setup screen.
Menu 12. Setup Screen
3. Press the Display Setup button at the bottom
of the screen.
Menu 13. Display Setup Screen
4. Press ‘Set Date/Time’ button.
Menu 14. Date and Time
5. Use the arrows to change the date and time, and
then press the OK button.
Battery
The display has a removable battery (CR2032) to
store time, date, lockout, and alerts in the event of a
power failure. It has an expected lifetime of 10 years.
The battery can be accessed from the back of the
Touchscreen display.
Battery ( CR2032 )
(Back)
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1. From the Home Page screen (Menu 15), press
the icon for the controller.
Menu 15. Home Page Screen
2. The Status Summary page for that controller will
appear. See Menu 16
Menu 16. Status Summary Screen
3. Press the Con gure button to start a con guration
session for the controller.
8.7.1
8.7.2
8.7.3
8.7.4
8.7.5
8.7.6
8.7.7
8.7.8
8.7.9
8.7.10
8.7.11
8.7.12
8.7.13
8.7.14
8.7.15
8.7.16
8.7.17
8.7.18
Menu 17. The Con guration Menu
From the Con guration Menu there are
18 Con guration Sub-Menus. Use the scroll tab on the
right to view them all.
The next section of this manual will show the installer
these sub-menus and the basics on how to setup/adjust
these con gurations.
8.7 The Con guration Menu
is the gateway to the parameters that the factory,
the installer, or the end user will need in order to setup,
service, maintain, or adjust the unit.
There are eighteen (18) items in the Con guration
Menu that can be viewed. Please Review Menu 17.
Each of these items will have Sub-Menus in which you
can make parameter adjustments and con gurations.
There are 18 total Conguration Sub
Menus. Please see the Installation and
Operating Manual for the complete list.
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8.7.1 through 8.7.15 are the
Con guration Sub-Menus.
The Con guration Sub-Menus ( ALL 18 )
8.7. 1
__
18
Some of these con gurations will require a Login
rst. See Menu 3 on page 46
8.7.2 B Setting Up 4-20 mA Setpoint
The Central Heat Con guration Menu (Menu 18) has
three sub-menus and each of them can be reached
by scrolling left or right thru the arrows on the left
and right. See Menu 19. The three sub-menus are
‘Central Heat’, ‘Setpoint’, and ‘Modulation’.
To set up 4-20 mA Setpoint, you will need to go
into the ‘Setpoint’ sub-menu fi rst and change the
Setpoint source from Local to S2 (J8-6) 4-20 mA.
Then go to the ‘Modulation’ sub-menu and set the
Modulation source to Local. Both Setpoint and
Modulation cannot have their source set as Local.
From the Central Heat Con guration Sub-Menu,
choose either the left or right arrow.
then Click onto ‘Local’.
Click onto the down arrow to see further options.
When using the Brute for hydronic heating, a call for
heat must be supplied to the “T-T” terminals found on
TB7 labeled “T-T or Interlock”. Once a call for heat
is established, the control will start the appropriate
(selected) pumps, and begin the ignition process.
8.7.1 System Identi cation & Access
This sub-menu will display information regarding
software, date codes, model numbers and program
name, as well as giving the installer access to re-name
the boiler and to change the modbus addresses for lead
lag operation.
Press the back arrow on the top right corner of the
screen to return to the ‘Con guration Menu’.
8.7.2 A CH - Central Heat Con guration
Menu 18. The Con guration Menu
Make sure that CH is Enabled and then press one of the
black arrows (either side) to get to the Set-Point screen.
Press on the ‘Setpoint’ box to make adjustments
to setpoint, and modulation for a single boiler CH
demand.
until you are on the ‘Setpoint’ sub-menu,
Menu 19. The Setpoint submenu
There are 18 total Conguration Sub
Menus. Please see the Installation and
Operating Manual for the complete list.
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BOILERS AND VOLUME WATER HEATERS
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Menu 20. CH Setpoint source
Choose S2 (J8-6) 4-20 mA, then press OK
Then scroll over to the Modulation sub-menu and
click onto Modulation rate source.
Select Local, then press OK.
8.7.3 Outdoor Reset Con guration
At this sub-menu, con rm that Central Heat is Enabled.
Next, press onto the Maximum Outdoor Temperature,
Minimum Outdoor Temperature, and Low Water
Temperature to get to each and adjusting their setpoints in
those sub-menus.
8.7.4 DHW - Domestic Hot Water
Con guration
DHW - Domestic Hot Water is used to con gure the
DHW temperature parameters for water heaters (NTV)
and for indirect water heaters that are used with boiler
(NTH) systems.
Press on the Setpoint box to get to the adjustment sub-
menu. Then adjust it up or down to your desired DHW
setpoint.
8.7.5 Warm Weather Shutdown
Con guration
From this sub-menu you will be able to enable/disable the
Warm Weather Shutdown feature and adjust the set
point.
Page 14
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H2374800A
Page 53
Brute
HIGH EFFICIENCY COMMERCIAL BOILERS AND VOLUME WATER HEATERS
fed by 120V (violet wire) internally from the main
power feed. The System and DHW contacts are dry
contacts. Appropriate voltage must be supplied to the
System and DHW pumps for proper operation.
The System pump connections are located on terminal
block 5 (TB5) in the control panel. The System pump
contacts are rated for 120Vac, 7.4 Amps. To use the
contacts, power must be supplied on one terminal
with the other terminal wired to the pump or a relay
controlling the pump.
The DHW pump connections are located on terminal
block 5 (TB5) in the control panel and are rated for
120Vac, 7.4 Amps. To use the contacts, power must be
supplied on one terminal, and the other terminal wired
to the pump or a relay controlling the pump. Additional
120VAC circuits may be required for the pumps.
8.7.6 Demand Priority Con guration
From the Demand Priority Con guration, the installer
can adjust the priority of the different demand types.
Central Heat, Lead Lag, Domestic Hot Water
The control uses arrows as indicators to point to the
loop with higher priority.
8.7.7 Modulation Con guration
From this sub-menu the installer has the ability to adjust
the range of modulation for the CH, and DHW demands.
Brute is designed with a 5:1 turn down ratio. Any
change to the minimum and maximum modulation rates
will affect the overall ratio of the boiler. The installer
level password will allow changes to these parameters.
Consult the factory if an adjustment is needed to any of
these parameters.
8.7.8 Pump Connections
The controller in the Brute energizes the pump contacts
when it receives a call for heat. Once the call for heat is
satis ed, the pump will remain on for the de ned pump
overrun time.
The Boiler Pump terminals (TB5 - max 7.4 FLA) are
200 Lafayette St.
Middleville, MI 49333
Warranty: (800) 531-2111
www.BradfordWhite.com
Litho in U.S.A. © Bradford White 1802 Document 1345A-BW
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Bradford White BNTH-750 Manuel utilisateur

BNTH-750
Bradford White
Marque
Bradford White
Modèle
BNTH-750
Taper
Manuel utilisateur
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