Submittal Sheet

Date: Bid Date:
Project #: Location:
Project Name: Engineer:
Contractor: Prepared By:
Contractor shall supply and install Qty.: _____ Laars Model No. MFTCW (size)_____ modulating condensing boiler(s).
The boiler shall be a Laars Mascot FT Model MFTCW (size)_______ rated at the input and output shown on the schedule. The boiler shall
modulate ______ -100% of full re. 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. The unit(s) shall be constructed to comply with the efciency requirements of the latest edition of ASHRAE
Standard 90.1. The boiler shall be equipped with an ASME certied pressure relief valve set at 30psi (207kPa).
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). The boiler shall have a minimum AFUE of 95%.
The re tube heat exchanger shall be stainless steel with aluminum core re tubes, rated for 30 psi (207 kPa) working pressure. The heat
exchanger shall be a low head loss design. Heat exchanger 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.
Boiler(s) shall provide domestic hot water ow rates, at 77°F (25°C) temperature rise, through an integral stainless steel domestic water indirect
tank of:
- 140 MBH = 3.2 gpm (12 l/m)
- 199 MBH = 4.8 gpm (18 l/m)
Integral DHW indirect tank shall hold a minimum of 0.5 gallon (1.9 L) of DHW
Domestic water heating shall have priority over the hydronic heating requirements. A Hall Effect ow sensor shall initiate the call for domestic water.
Boiler shall be packaged with mounted and wired pump inside the boiler jacket.
Each boiler shall be test red and all safety components tested, at the factory.
The boiler shall be sealed combustion. The boiler jacket shall be a unitized shell nished with acrylic thermoset paint. Chamber shall include a sight
glass for viewing ame.
Boiler shall have a condensate trap that does not need to be primed and will not allow ue gases to pass back through unit.
Boiler shall operate on 3.5-13" w.c. gas pressure.
The boiler shall use a premix ceramic ber burner and a zero governor gas valve to burn cleanly, with NOx emissions not exceeding 17ppm. The
boiler shall meet the emissions requirements of SCAQMD.
The boiler shall be designed for vertical or horizontal Category IV venting:
- Up to 50 equivalent feet with 2" diameter in PVC, CPVC, Polypropylene or stainless steel vent material (propane models limited to 25
equivalent feet of 2" diameter vent).
- Up to 100 equivalent feet with 3” diameter in PVC, CPVC, Polypropylene or stainless steel vent material
Air may be taken from the room, or ducted directly to the boiler:
- Up to 50 equivalent feet with 2" diameter in ABS, PVC, CPVC, Polypropylene or galvanized pipe (propane models limited to 25 equivalent feet
of 2" diameter vent).
- Up 100 equivalent feet with 3” diameter in ABS, PVC, CPVC, Polypropylene or galvanized pipe
Unit shall be 120VAC, single phase, less than 4 Amps (including mounted pump) for connection to a 15A breaker. The control circuit shall be
24VAC. A 3 ft. length 14 AWG plug-in line cord is included for connection to 120VAC/15A receptacle.
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 boiler control shall be an integrated electronic PID temperature and ignition control with LCD, push buttons and dial and shall control the boiler
operation and ring rate. The boiler display shall be visible without the removal of any jacket panels.
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 0-10VDC input connection from an external control or building automation system, for remote
temperature setpoint control.
The control shall monitor ue gas temperature and shall stop the boiler from ring if temperature is excessive.
continued >>
Date: Bid Date:
Project #: Location:
Project Name: Engineer:
Contractor: Prepared By:
Mascot FT
Residential
Wall Mounted
Combination Boiler
Models MFTCW 140 & 199, Indoor
Specication