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 1711 Document 5084-99B
Standard features shall include:
• Electronic PID modulating control with large
color touchscreen display
• Password-protected parameters
for installer use
• Test feature allows forced min or
max ring
• Complete diagnostics for analog
and digital inputs
• Displays holds, alerts and errors
in clear text form
• Dray alarm contacts for ignition failure
• High condensing efciency
• Modulation down to 20% of full re (5:1
turndown)
• Sealed combustion chamber
• Pre-mix stainless steel burner
• Low NOx system exceeds the most stringent
regulations for air quality - less than 10ppm
NOx
• Built-in condensate trap
• Vent temperature cutoff feature
• Direct spark ignition system
• Sensor for domestic water tank
• 160 psi maximum working pressure
• Stainless steel heat exchanger with welded
construction (no gaskets)
• ASME "H" stamp ("HLW" stamp optional)
• 125 psi (861 kPa) ASME rated pressure relief
valve
• Water ow switch (399-850 only)
• Temperature & pressure gauge
• Drain valve
• Integrated PID temperature and ignition
controls
• Alarm output
• Accepts external 4-20mA (0-10V with optional
convertor) modulation signal
• On/off toggle switch
• Manual reset high limit
• Burner site glass
• Zero clearance to combustible surfaces
• Built-in cascade function for multiple units, up
to 8 total.
• 8 year limited heat exchanger warranty
Allowable control adjustments shall include: heater temperature setpoint; domestic water temperature setpoint; automatic high limit: °F or °C
display; DHW setpoint for time of day input; DHW PID gain parameters; manual ring rate control; pump delay time; pump exercise interval;
automatic remote signal detection; anti-shortcycle feature enable/disable.
The control shall have installer-level password, and verication feature to ensure that safety-related parameters are not altered by mistake.
The control shall be able to cascade and lead-lag with other NeoTherm controllers, for a total of eight NeoTherm heaters, without additional system
controllers.
The heaters shall be controlled to keep each one in the lowest ring rate possible, based on system demand, to maximize efciency. For example,
in multiple heater systems, the master control shall choose to bring on all heaters at low ring rates, instead of one heater at a high rate, to meet
the system needs.
A control that is chosen as master in a system with multiple controllers shall display an icon of each of the controls that it is controlling. The color
of the icon shall indicate if the control is in normal operation, in lockout, in standby mode, in a hold state, or if there is a communication error. In
addition to adjustable parameters, the master display shall also be able to show information about the following for each heater it is monitoring:
The control shall graphically depict the ring rate of each burner in system, if the controller is the master of other heaters in a multiple heater
system.
The controller shall be able to send information through a modbus connection, including (but not limited to) inlet and outlet water temperatures,
stack temperature, DHW temperature, status of sensors, fan speed, setpoints, remote control input, burner status, lockout codes, alarm reasons,
domestic water pump status.
Control diagnostics shall include, at a minimum, the following: ignition failure, grounded ame rod, safety chain interrupt, heater 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.
The control shall have a clock with a battery backup and will allow the user to access the burner run time, and cycle counts for the burner and DHW pump.
The control shall differentiate 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 display to be presented with a more detailed explanation of the issue.
• domestic hot water
• burner control
• demand and modulation
• inlet temperature
• fan
• domestic water pump
• ame detection
• statistics
• stack limit
• frost protection
www.BradfordWhite.com
200 Lafayette St.
Middleville, MI 49333
Warranty: [phone]
Litho in U.S.A. © Bradford White
1711 Document 5084-99B-BW
Brute controllers, for a total of eight Brute heaters, without additional system