Spec Sheet

Date: Bid Date:
Project #: Location:
Project Name: Engineer:
Contractor: Prepared By:
Contractor shall supply and install Qty.: _____ Laars Model No. MLXHW (size)_____ modulating condensing boiler(s).
The boiler shall be a Laars Mascot LX Model MLXHW (size)_____ rated at the input and output shown on the schedule. The boiler shall modulate
20-100% 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 water tube heat exchanger shall be stainless steel, rated for 30 psi (207 kPa) working pressure. The heat exchanger shall be a low water
volume design, welded construction, with no gaskets, o-rings or bolts in the header. 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 fteen-year warranty.
Boiler shall be packaged with mounted and wired pump inside the boiler jacket.
Each boiler shall be fully test red, (with water, gas, and venting connected), 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 thermo-set paint baked at not less than 325°F
(163°C). Front cover shall be high quality textured plastic. The frame shall be constructed of galvanized steel for strength and protection. Chamber
shall include a sight glass for viewing ame. Boiler shall be certied for zero clearance to combustible surfaces.
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 4-13" w.c. gas pressure, and shall need no component changes to operate at high altitude, up to 10,000 feet, or to convert
from Natural Gas to LP (or vice versa).
The boiler shall use a premix burner with a stainless steel woven metal ber wrap, and a zero governor gas valve to burn cleanly, with NOx
emissions not exceeding 10ppm. The boiler shall meet the emissions requirements of SCAQMD.
The boiler shall be designed for vertical or horizontal Category IV venting:
- Up to 40 equivalent feet with 2" diameter (30 equivalent feet for 220 MBH) in PVC, CPVC, Polypropylene or stainless steel vent material
- Up to 150 equivalent feet with 3” diameter, (120 equivalent feet for 220 MBH) in PVC, CPVC, Polypropylene or stainless steel vent material
- Up to 40 equivalent feet, with 3"/5" stainless steel concentric vent material.
Air may be taken from the room, or ducted directly to the boiler:
- Up to 40 equivalent feet with 2" diameter (30 equivalent feet for 220 MBH) in ABS, PVC, CPVC, Polypropylene or galvanized pipe
- Up 150 equivalent feet with 3” diameter (120 equivalent feet for 220 MBH) in ABS, PVC, CPVC, Polypropylene or galvanized pipe
- Up to 40 equivalent feet through a 3"/5" concentric vent system.
The boiler shall be shipped with PVC sidewall vent and air terminals, for use with split vent/air systems. PVC adapters shall be shipped with each boiler.
Unit shall be 120VAC, single phase, less than 2.2 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 receptable.
The boiler control shall be an integrated electronic PID temperature and ignition control with LCD and touchpad and shall control the boiler
operation and ring rate. The boiler display shall be visible without the removal of any jacket panels or control panels.
The control shall have the ability to control the boiler pump and system pump, each with delay features. The control shall be able to cascade and
lead-lag with other Mascot LX controllers, without additional system controllers.
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 easily allow the user to force the boiler into minimum or maximum ring rate, for boiler setup and diagnostic purposes.
Control shall have 3 menu structures for user mode, installer mode and service mode.
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Mascot LX
Wall Mounted,
Residential, Boiler
Models MLXHW 50 - 220 Indoor
Specication
Specication
Indoors. Models BLXH 50, 75, 100, 125,
150, 175, 220
Contractor shall supply and install Qty.: _____ Bradford White Model No. BLXH _________ modulating, condensing boiler(s).
The boiler shall be a Bradford White Brute LX, Model BLXH _________, rated at the input and output shown on the schedule. The boiler shall modulate
The control shall have the ability to control the boiler pump and system pump, each with delay features. The control shall be able to cascade and
lead-lag with other Brute LX controllers, without additional system controllers.
Brute LX
Wall Mounted,
Residential Boiler