Spec Sheet

Customer Service and Product Support: 800.900.9276 • Fax [phone]
Headquarters: 20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax [phone]
9 Brigden Gate, Halton Hills, Ontario, Canada L7G 0A3 [phone] Fax: [phone]
www.Laars.com
Litho in U.S.A. © Laars Heating Systems 20-02 Document 5084-109
Standard features shall include:
• ASME "H" stamp
• 160 psi maximum working pressure
• Certied for Category II and Category IV vent
systems
• Indoor/outdoor
• Low NOx system exceeds the most stringent
regulations for air quality
• High condensing e󰀩ciency
• Up to 20:1 turndown modulation
• Sophisticated gas/air valve allows for constant
control of modulation
• Tru Trac
TM
real-time O
2
sensing maintains
e󰀩ciency throughout the modulation range
• Stainless steel vertical re tube heat exchanger
with welded construction
• Sealed combustion chamber
• Pre-mix stainless steel burner
• Electronic PID modulating control with large
touchscreen and color display
• Multiple independent heat demands
• VARI-PRIME boiler pump control via user-
selectable xed boiler temperature rise
• Wired and programmed to control boiler
isolation valves
• Controller cascades with up to eight
MagnaTherm FT boilers
• Accepts 4-20mA or 0-10VDC external
modulation or external set point control
• Modbus RTU & BACnet MSTP on board
• Multiple pump control for boiler pump, system
pump, & indirect DHW water pump, each with
delay
• Indirect water heater priority
• Sensor for indirect DHW tank
• Outdoor reset with air sensor
• Horizontal or vertical direct vent
• Vent and air pipe lengths of up to 100
equivalent feet (each)
• High & low gas pressure switches
• Vent temperature cuto󰀨
• Normally open alarm contact
• Air lter
• Built-in condensate trap
• Temperature & pressure gauge
• Low water cuto󰀨
• Water ow switch
• 75 psi (517kPa) ASME rated pressure relief
valve
• Flange water ttings
• Burner site glass
• Heat exchanger warranty:
10-year limited non-prorated
25-year limited thermal shock
• 1-year limited parts warranty
temperature and desired system water temperature. The boiler shall be shipped with the outdoor reset sensor, as standard equipment. The control shall
have a summer kick feature that energizes boiler, system and DHW pumps if they have not cycled for a user-selectable amount of time.
The control shall be able to cascade and lead-lag with up to eight other MagnaTherm FT boilers. The control system shall allow the user to choose
the rotation method that is desired. In the event of a loss of communication with the lead boiler, the user shall be able to choose to run the system from
the lead boiler's internal set point, or choose another unit to assume lead responsibility. A control that is chosen as master in a system with multiple
controllers shall display an icon of each of the controls in the system. The color of the icon shall indicate if the control is in normal operation, in standby
mode, in a hold state, locked out, or if there is a communication error.
The control shall have the ability to accept a 4-20mA or 0-10VDC input connection from an external control or building automation system. The control
shall allow the user to choose to use this external signal as a temperature setpoint or a modulation signal. The controller shall be able to send and
receive information through a Modbus RTU or BACnet MSTP connection, including (but not limited to) inlet and outlet water temperatures, stack
temperature, DHW temperature and priority, central heating temperature, frost protection, warm weather shutdown, status of sensors, fan speed,
setpoints, remote control input, burner status, lockout codes, alarm reasons, system pump status, boiler pump status and domestic water pump status.
Gateways shall be available for additional communication protocols.
The control's service menu shall include access to turn burner on and o󰀨, valve information, history, factory default reset, and the ability to recalibrate
the touchscreen / display. Control diagnostics shall include, at a minimum, the following: ignition failure, grounded ame rod, safety chain interrupt,
boiler high limit exceeded, domestic water high limit exceeded, temperature rise limit exceeded, stack limit exceeded, pressure sensor fault,
combustion pressure fault, blocked air intake, sensor errors (open or shorted), 24VAC voltage low or high, modulation fault, pump fault, AC input
phases reversed, and fan speed proving rate failure. Valve information shall be viewable via the service menu, and shall include valve phase, fuel
actuator position, air actuator position, VSD setting, modulation rate, ame signal, error code, diagnostic code, inputs, outputs, burner ID, lower trim
limit, upper trim limit, current trim and fan speed. Boiler history shall be accessible via the service menu, and shall have information on demand cycle
counts, burner cycles, pump cycles, recent lockout conditions, boiler temperature statistics and ring time statistics.
The control shall easily allow the user to force the boiler into minimum or maximum ring rate, for setup and diagnostic purposes. The control shall
di󰀨erentiate between a lockout, a hold, or an alert. If an issue occurs, the system will display a brief description of the issue on the control screen. The
user shall be able to tap the message icon on the display to be presented with a more detailed explanation of the issue.
Digital inputs accessible in the service menu shall include on/o󰀨 status of the water ow switch, low water cuto󰀨, manual reset high limit, thermal
cutout, high gas pressure switch, low gas pressure switch, condensate level, both calls for space heating, and the DHW call for heat. Digital outputs
accessible in the service menu shall include on/o󰀨 status of boiler run, alarm, safety satised, valve enabled, valve reset, boiler pump, system pump,
DHW pump, auxiliary power output, and auxiliary dry contact. Analog inputs accessible in the service menu shall include inlet water temperature, outlet
water temperature, ue temperature, and DHW temperature. Analog outputs accessible in the service menu shall include percentage depictions for
pump speed, fan speed, mixing valve, and auxiliary.
The boiler control shall have a USB port that allows parameter sets to be uploaded from the controller and downloaded from the controller, for
diagnostic purposes, and to allow a parameter set to be copied from one boiler to another. The USB port shall also allow runtime data and history to be
captured in a tab-deliminated text le for use with spreadsheet programs.
Auto and manual reset high limit settings with reset di󰀨erential shall be programmable, and the control shall have an anti-short-cycle setting that allows
the user to choose how long the boiler will wait to re after a heat demand is satised. PID parameters (on hysteresis, o󰀨 hysteresis, proportional
gain, integral time, derivative time) and minimum / maximum delta T (temperature di󰀨erence) between which the boiler will modulate shall be user-
programmable for times when such tuning would be benecial.
The control shall monitor ue gas temperature and shall reduce boiler input as the maximum ue gas temperature is approached, with manual reset
stop if temperature exceeds maximum setting.
To assist in avoiding freeze-up conditions, the user shall be able to set a boiler inlet water temperature that will activate an anti-frost mode. The user
shall be able to choose if a pump, multiple pumps, or pump(s) and burner will be energized when the boiler enters this mode.
The control shall have dry alarm contacts for ignition failure.
Each boiler shall be fully test red, (with water, gas, and venting connected), and all safety components tested, at the factory.
200 Lafayette St.
Middleville, MI 49333
Warranty: [phone]
www.BradfordWhite.com
Litho in U.S.A. © Bradford White 20-03 Document 5084-109-BW
Controller cascades with up to eight (total)
Brute MagnaTech FT’s
Real Time 0
2
sensing maintains e󰀩ciency
throughout the modulation range
The control shall be able to cascade and lead-lag with up to eight other MagnaTech FT boilers. The control system shall allow the user to choose the
rotation method that is desired. In the event of a loss of communication with the lead boiler, the user shall be able to choose to run the system from the
lead boiler’s internal set point, or choose another unit to assume lead responsibility. A control that is chosen as master in a system with multiple controllers
shall display an icon of each of the controls in the system. The color of the icon shall indicate if the control is in normal operation, in standby mode, in a hold
state, locked out, or if there is a communication error.
• Variable speed boiler pump control with xed
Delta T control for variable ow through boiler