Spec Sheet

Date: Bid Date:
Project #: Location:
Project Name: Engineer:
Contractor: Prepared By:
Contractor shall supply and install Qty.:______ Laars Model No. MFTHW (size)_______ wall-mounted modulating condensing boiler(s).
The boiler shall be a Laars FT Series model MFTHW (size)_______ rated at the input and output shown on the schedule. The unit(s) shall be
design-certied to comply with the current edition of the Harmonized ANSI Z21.13 / CSA 4.9 Standard for Gas-Fired Low Pressure Steam and Hot
Water Boilers. The unit(s) shall be designed and constructed in accordance with the ASME Boiler & Pressure Vessel Code, Section IV requirements
for 30 psi (207 kPa) maximum working pressure, and shall bear the ASME "H" Stamp and be listed by the National Board. Models 140 and 199
shall modulate from 10-100% of full re for 10:1 turndown ratio. Model 100 shall modulate from 20-100% of full re for 5:1 turndown ratio.
The boiler shall be listed with the U.S. Department of Energy as an Energy Star appliance. The boiler shall be listed with AHRI (Air Conditioning,
Heating and Refrigeration Institute), with a minimum AFUE of 95%. The unit(s) shall be constructed to comply with the e󰀩ciency requirements of
the latest edition of ASHRAE Standard 90.1. The boiler shall meet the most stringent NOx emissions requirements.
The re tube heat exchanger shall be stainless steel with aluminum core re tubes. The heat exchanger shall be a low head loss design, and shall
be accessible for visual inspection and cleaning of internal surfaces. The boiler shall be fully condensing design with built-in condensate drain and
trap. The heat exchanger shall have a limited 10-year warranty.
The boiler shall be sealed combustion, and use a premix ceramic ber burner and a zero governor gas valve to burn cleanly. The boiler shall
operate with 3.5-10.5" w.c. natural gas pressure (or 8-13” propane gas pressure with conversion). The combustion chamber shall include a sight
glass for viewing ame. The boiler jacket shall be a unitized shell nished with acrylic thermoset paint.
The boiler shall be packaged with mounted and wired pump inside the boiler jacket. The boiler shall be equipped with an ASME certied pressure
relief valve set at 30psi (207kPa). The boiler shall have a condensate trap that does not need to be primed and will not allow ue gases to pass
back through unit.
The boiler shall be designed and certied for vertical or horizontal Category IV venting. Vent materials may be PVC, CPVC, Polypropylene or
stainless steel. Vent pipe length may be up to 50 equivalent feet of 2" diameter pipe, or up to 100 equivalent feet of 3” diameter pipe.
Air may be taken from the room, or ducted directly to the boiler. Air pipe materials may be ABS, PVC, CPVC, Polypropylene or galvanized. Air pipe
length may be up to 50 equivalent feet of 2" diameter pipe, or up to 100 equivalent feet of 3” diameter pipe.
Unit shall be 120VAC, single phase, less than 4 Amps (including mounted pump) for connection to a 15A breaker. Maximum power consumption
shall be 160W. The control circuit shall be 24VAC. A three-foot length 14 AWG plug-in line cord shall be included for connection to a 120VAC/15A
receptacle.
Field connections for main power, external circulator, call for heat (thermostat or endswitch), low water cuto󰀨, and outdoor sensor shall be easily
accessible via line voltage and low voltage terminal strips. The control shall have the ability to accept a 0-10VDC input connection from an external
control or building automation system, for remote temperature setpoint control.
The boiler control shall be an integrated electronic PID temperature and ignition control with LCD, push buttons and dial. It shall control the boiler
operation and ring rate. The boiler display shall be visible without the removal of any jacket panels, and shall be waterproof.
The display shall include a numeric display to indicate temperature values, and shall have icons that indicate call for space heating, anti-freeze
mode, warm weather shutdown (summer mode), outside temperature mode, 0-10V setpoint mode, controller lock, status or installer mode, ame
signal, and pump operation.
The control shall have built-in outdoor reset feature with warm weather shutdown, and 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 easily allow the user to force the boiler into minimum or maximum ring rate, for boiler setup and diagnostic purposes. The
control shall monitor ue gas temperature and shall stop the boiler from ring if temperature is excessive. The boiler shall have built-in gas leakage
detection capabilities, such that when gas is detected for greater than 5 seconds, or three times within 10 minutes, the boiler will lock out for safety
purposes.
The control shall have menu structures for user mode and installer mode. Allowable control adjustments shall include: Boiler temperature setpoint;
°F or °C display; Outdoor reset selection; Low boiler setpoint temperature (for outdoor reset operation); Boiler temperature at high outdoor
temperature (for outdoor reset operation); and Boiler setpoint at low outdoor temperature (for outdoor reset operation).
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Date: Bid Date:
Project #: Location:
Project Name: Engineer:
Contractor: Prepared By:
Residential
Wall Mounted
Boiler
Models MFTHW 100, 140 & 199, Indoor
Specication
FT S
ERIES
Brute
®
FT
Residential,
Wall Mounted
Boiler
Model BMFTHW 100, 140, & 199, Indoor
Contractor shall supply and install Qty.:______ Bradford White Model No. MFTHW (size)_______ wall-mounted modulating condensing boiler(s).
The boiler shall be a Bradford White FT Series model MFTHW (size)_______ rated at the input and output shown on the schedule. The unit(s) shall be