Submittal Sheet

Date: Bid Date:
Project #: Location:
Project Name: Engineer:
Contractor: Prepared By:
Contractor shall supply and install Qty.: _____ Laars Model No. NTH_________ modulating boiler(s).
The boiler shall be a Laars NeoTherm Model NTH_________, rated at the input and output shown on the schedule. The boiler shall modulate 20-
100% of full fire. The unit(s) shall be design-certified 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 efficiency requirements of the latest edition of ASHRAE Standard 90.1. The
boiler shall be equipped with an ASME certified 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 90%.
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 all internal surfaces. The boiler shall be fully condensing design with built-in condensate drain and trap. The heat exchanger shall have
a limited twelve-year warranty.
Each boiler shall be fully test fired, (with water, gas, and venting connected), and all safety components tested, at the factory.
The boiler shall be sealed combustion, and removal of jacket panels shall not affect the combustion seal. The boiler jacket shall be a unitized shell
finished with acrylic thermo-set paint baked at not less than 325°F (163°C). The frame shall be constructed of galvanized steel for strength and
protection. Chamber shall include a sight glass for viewing flame. Boiler shall be certified for zero clearance to combustible surfaces.
All water, gas, vent and air connections shall be on the top of the boiler, and the top jacket panels shall be split, such that they are removable
without disconnecting the water, gas, vent or air pipes.
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.
The boiler shall use a premix burner with a stainless steel woven metal fiber wrap, and a negative pressure gas valve to burn cleanly, with NOx
emissions not exceeding 10ppm. The boiler shall meet the emissions requirements of SCAQMD 2012.
The boiler shall be designed for vertical or horizontal Category IV venting, up to 100 equivalent feet, with 3" diameter PVC, CPVC or stainless steel
vent material. Air may be taken from the room, or ducted directly to the boiler, using up to 100 equivalent feet of 3" diameter ABS, PVC, CPVC or
galvanized pipe. The boiler shall be shipped with PCV sidewall vent and air terminals, for use with horizontal systems. The first section of CPVC
vent pipe shall be shipped with each boiler.
Unit shall be 120VAC, single phase, less than 6 Amps (including mounted pump) for connection to a 15A breaker. The control circuit
shall be 24VAC.
The boiler control shall be an integrated electronic PID temperature and ignition control with LCD and touchpad and shall control the boiler
operation and firing rate. The control shall have three menu structures for user mode, set-up mode, and diagnostic model. The boiler display shall
be visible without the removal of any jacket panels or control panels.
When a display or control is field-replaced, the device shall have the ability to read parameter setpoints from the original set-up, so the system does
not have to be re-programmed.
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 definition 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 flame. The control shall have dry alarm contacts for ignition failure.
The control shall monitor flue gas temperature and shall stop the boiler from firing 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.
NeoTherm
Boiler
Model NTH 150 & 210 Indoor
Specification
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