Spec Sheet

Date: Bid Date:
Project #: Location:
Project Name: Engineer:
Contractor: Prepared By:
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MAGNATHERM
HTD Water Heater
MGV, Indoor/Outdoor
Models 1600, 2000, 2500,
3000, 3500, 4000
Specication
Contractor shall supply and install Qty.:________ Laars Model No. MGV ________modulating condensing water heater(s).
The heater shall be a Laars MagnaTherm HTD Model MGV ________, rated at _________ BTU/hr input and ________ BTU/hr output. The heater shall
modulate 5-100% of full re, for a 20:1 turndown. The unit(s) shall be design-certied to comply with the current edition of the Harmonized ANSI Z21.10.3
/ CSA 4.3 Standard for Gas Water Heaters. The unit(s) shall be designed and constructed in accordance with the ASME Heater & Pressure Vessel Code,
Section IV requirements for 160 psi (1103 kPa) maximum working pressure, shall bear the ASME "HLW" Stamp and be listed by the National Board.
The heater shall be listed with AHRI (Air Conditioning, Heating and Refrigeration Institute). The heater shall have minimum thermal e󰀩ciency 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 heater shall be sealed combustion, and shall use a premix burner with a stainless steel woven metal ber wrap, and a negative pressure gas valve to
burn cleanly, with NOx emissions not exceeding 9ppm. The heater shall meet the emissions requirements of SCAQMD.
The gas/air system shall allow the heater to modulate and remain stable down to 5% of full re. An oxygen trim system shall constantly measure the oxygen
in the exhaust gases, and adjust the air/fuel ratio by varying the combustion air speed, relative to the fuel valve settings, to ensure consistent e󰀩ciency, clean
combustion, and high heat recovery throughout the modulation range.
The heater shall be certied for placement indoors and outdoors.
The heater shall be designed and certied for vertical or horizontal Category IV venting, up to 100 equivalent feet, with 6" (1600), 8" (2000 & 2500), 10” (3000
& 3500) or 12” (4000) diameter CPVC, polypropylene or stainless steel vent material. The heater shall be certied for Category II venting with vent pressures
of -0.1 to -.001" w.c.. Air may be taken from the room, or ducted directly to the heater using up to 100 equivalent feet of 6" (1600), 8" (2000 & 2500), 10”
(3000 & 3500) or 12” (4000) diameter of ABS, PVC, CPVC or galvanized pipe.
The water tube heat exchanger shall be stainless steel, and shall be a low water volume design with micro-n tubing, welded construction, and no gaskets,
o-rings or bolts in the header. The heat exchanger shall be accessible for visual inspection and cleaning of all internal surfaces. The heater shall be fully
condensing design with built-in condensate drain and trap. The heat exchanger shall have a limited ten-year warranty.
The heater shall be equipped with an ASME certied pressure relief valve set at 125psi (861 kPa). Optional pressure relief valves with settings of 30psi
(207kPa), 50psi (345 kPa), 60psi (413 kPa), 75psi 517 (kPa), or 150psi (1034 kPa) shall be available.
The heater shall operate at gas pressures of 4-10.5" w.c.(natural gas), and shall need no component changes to operate at high altitude, up to 10,000 feet.
The heater jacket shall be a unitized shell nished 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 ame. The heater shall have a knockdown feature that allows the
top section of the heater to be removed, allowing for easy handling and installation.
The heater shall have an integrated temperature / ignition control, oxygen trim control, and valve control that work together to ensure heater operation, safety
and combustion functions are harmonized. The gas/air system shall allow the heater to modulate and remain stable throughout the modulation range.
The temperature / ignition control shall be an integrated electronic PID control with large touchscreen and color display. The heater display shall be visible
without the removal of any jacket panels or control panels. The control shall display using icons and words, for clarity. The control's home page shall display
security level, quick start access, conguration menu access, service menu access, messages, an indication of which demands are active, a navigation bar,
date, and time. In addition, the home screen shall display all set points, actual and target ring rates, ame signal, O2 reading, ue temperature, heater inlet
and outlet temperatures, domestic water temperature (when DHW sensor is used), and status of all pumps.
The control shall have a quick-start menu, conguration menu, and service menu. The quick start menu shall allow conguration of basic functionality and the
most common settings, without the need to access all parameters that are available. The conguration menu shall hold all settable/changeable parameters.
The service menu shall allow for access to information that will help setup and troubleshoot the heater.
The control shall have three levels of access, each with a unique password; user, installer and OEM. A verication feature shall be present, to ensure
that safety-related parameters are not altered by mistake. The control shall have a lockout feature, so that changes cannot be made without entering the
password. The user shall be able to choose how long the control will remain unlocked after user interaction has stopped.
The control shall have two independent domestic water (DHW) setpoints, each with adjustable di󰀨erentials. The heater shall come equipped with a DHW
sensor, but the control shall be able to recognize a call for DHW via this sensor or a closure from a tank stat on the same terminals. The user shall be able to
choose the priority of all demands. It shall have the ability to control two domestic water pumps, each with delay and exercise features.
The control shall be able to cascade and lead-lag with up to eight other heaters that are equipped with the Laars Linc control system. The control system
shall allow the user to choose the rotation method that is desired. In the event of a loss of communication with the lead heater, the user shall be able to
choose to run the system from the lead heater's internal set point, or choose another unit to assume lead responsibility. A control that is chosen as master
in a system with multiple controllers shall display an icon of each of the controls in the system. The color of the icon shall indicate if the control is in normal
operation, in standby mode, in a hold state, locked out, or if there is a communication error.
The control shall have the ability to accept a 4-20mA or 0-10VDC input connection from an external control or building automation system. The control shall
allow the user to choose to use this external signal as a temperature setpoint or a modulation signal.
The controller shall be able to send and receive information through a Modbus or BACnet MSTP connection, including (but not limited to) inlet and outlet
water temperatures, stack temperature, DHW temperature, frost protection, status of sensors, fan speed, setpoints, remote control input, burner status,
lockout codes, alarm reasons, and domestic water pump status. Gateways shall be available for additional communication protocols.
The control's service menu shall include access to turn burner on and o󰀨, valve information, history, factory default reset, and the ability to recalibrate the
touchscreen / display. Control diagnostics shall include, at a minimum, the following: ignition failure, grounded ame rod, safety chain interrupt, heater high
limit exceeded, domestic water high limit exceeded, temperature rise limit exceeded, stack limit exceeded, pressure sensor fault, combustion pressure
fault, blocked air intake, sensor errors (open or shorted), 24VAC voltage low or high, modulation fault, pump fault, AC input phases reversed, and fan speed
Contractor shall supply and install Qty.: _____ Bradford White Model No. BMGV_________modulating water heater(s).
The heater shall be a Bradford White, Brute MagnaTech HTD, Model BMGV_________rated at_________BTU/hr input and________BTU/hr output. The heater shall
Specication
BMGV 1600 - 4000
Indoor/Outdoor
The control shall be able to cascade and lead-lag with other Brute MagnaTech units that are equipped with the same controller, for a total of eight Brute
MagnaTech water heaters, without additional system controllers. The control system shall allow the user to choose the rotation method that is desired. In
the event of a loss of communication with the lead heater, the user shall be be able to choose to run the system from the lead heater’s internal set point, or
choose another unit to assume lead responsibility. A control that is chosen as Leader in a system with multiple controllers shall display an icon of each of the
controls in the system.
Brute MagnaTech
®
HTD
Water Heater