Spec Sheet

Customer Service and Product Support: 800.900.9276 • Fax [phone]
Headquarters: 20 Industrial Way, Rochester, NH, USA 03867 • 603. 335. 6300 • Fax [phone]
9 Brigden Gate, Halton Hills, Ontario, Canada L7G 0A3 • 905.203.0600 • Fax [phone]
www.Laars.com
Standard features shall include:
• High condensing e󰀩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
-10ppm NOx
• Horizontal or vertical direct vent
• Horizontal vent and air terminals
• Vent and air pipe lengths of up to 100
equivalent feet (each)
• Built-in condensate trap
• Vent temperature cuto󰀨
• Indirect water heater priority (sensor
included)
• ASME heat exchanger
• Stainless steel heat exchanger with
welded construction
• ASME "H" stamp
• Circulating pump with anges and
wiring harness for eld mounting
• 30 psi (207 kPa) ASME rated pressure
relief valve (285 has 75 psi)
• Temperature and pressure gauge
• Drain valve
• Multiple pump control for boiler pump,
system pump and indirect domestic
water pump, each with delay.
• Electronic PID modulating control
• Direct spark ignition
• Large user-interface and display
• Alarm output
• Accepts external (4-20mA or 0-10VDC)
modulation signal
• Outdoor reset (sensor included)
• On/O󰀨 toggle switch
• Manual reset high limit
• Burner site glass
• Flue gas temperature cuto󰀨
• Zero clearance to combustible surfaces
• 12-year limited warranty
The control shall have the ability to control the boiler pump, system pump, and indirect domestic water pump, each with delay features. The control
shall be able to cascade and lead-lag with other NeoTherm controllers, without additional system controllers. An optional display that is full-color,
high denition LCD with touch-screen shall be available, to allow for additional communication ports.
The control shall have the ability to integrate indirect domestic water heating with the boiler system. The control shall have domestic hot water
priority, and shall have the ability to recognize a domestic water sensor or closure from a tank stat on the same terminals. The boiler shall be
shipped with the domestic water heater sensor, as standard equipment.
The control shall have built-in outdoor reset feature with customizable reset curves, based on the outdoor temperature and desired system water
temperature. The boiler shall be shipped with the outdoor reset sensor, as standard equipment.
The control shall have the ability to accept a 4-20mA or 0-10VDC input connection from an external control or building automation system, to
modulate the ame. The control shall have dry alarm contacts for ignition failure.
The control shall monitor ue gas temperature and shall stop the boiler from ring if temperature is excessive.
The control shall have a display button that allows a user to choose one of six menus, including: Login; Display Setup; Quick Start; Advanced
Setup; Test’ Diagnostics. The display button shall be active at all times, regardless of what menu the control is showing. Login shall allow an
installer to adjust password-protected parameters.
A Display Setup menu shall allow the user to adjust the LCD contrast, and to customize the display’s homescreen. The user shall be able to
choose ve of the following parameters to display on the homescreen – system setpoint, operating temperature, outlet temperature, outlet tempera-
ture, inlet temperature, outdoor temperature, boiler temperature rise (delta T), lead-lag operating temperature, lead-lag system setpoint, fan speed,
ame signal, ring rate, domestic water temperature, stack temperature, and 4-20mA input level. The homescreen shall also indicate the boiler
name, what ring state the boiler is in, if there is a demand on the boiler, if the system is in password-level status, and shall show any holds, alerts,
or lockouts that are present. The homescreen shall be accessible at any time by pressing a homescreen button on the display.
A Quick Start menu shall present only the select few parameters that are needed for a simple, single boiler installation.
The Advanced Setup menu shall give the installer access to all adjustable parameters, for more complex installations, including; all lead-lag set
up parameters, boiler high limit, boiler temperature setpoint and on/o󰀨 di󰀨erentials, domestic water temperature setpoint and on/o󰀨 di󰀨erentials,
domestic water priority time, boiler stack temperature limit, pump delay and exercise values for all pumps controlled, PID parameters, outdoor reset
selection, low boiler setpoint temperature (for outdoor reset operation), boiler temperature at high outdoor temperature (for outdoor reset operation),
boiler setpoint at low outdoor temperature (for outdoor reset operation), warm weather shutdown, automatic remote signal detection, anti-short-
cycle feature adjustment, and °F or °C display.
The control shall have a Test menu that allows the user to force the boiler into minimum or maximum ring rate for 10 minutes, for set-up purposes.
The test menu shall also allow the burner to be turned on or o󰀨, and the pumps to be set to on or auto, for testing purposes. The control shall show
a count-down timer, enabling the user to see how much time is left for the test segment.
A Diagnostics menu shall allow the user to see analog inputs, digital inputs, and the history of alerts and lockouts. Analog inputs shall include –
outlet temperature, inlet temperature, temperature rise (delta T), domestic water temperature, stack temperature, outdoor temperature, fan speed,
ame signal, ring rate, 4-20mA input level, and system sensor temperature. Digital inputs shall include – main valve state, alarm status, demand
status, safety chain status, and interlock status. The control shall display information about holds, alerts, and errors in both text form, and with
codes numbers for further analysis.
21-09 Document 5088-33
200 Lafayette St.
Middleville, MI 49333
Warranty: [phone]
www.BradfordWhite.com
Litho in U.S.A. © Bradford White 21-10 Document 5088-33-BW
Brute