IFB-SPEC-04
TypicalSpecificationfor Lochinvar®Intelli-Fin®Boiler
Models1,500,000-2,000,000Btu/Hr
The hot water BOILER shall be a LOCHINVARINTELLIFIN Model IB(N,L)______ having an input rating of ______Btu/Hr, an output of ______ Btu/Hr and shall be operated on (Natural Gas) (L.P. Gas).
The water containing section shall consist of two integrated heat exchangers constructed of "Fin Tube" design, with straight copper tubes having extruded integral fins spaced seven (7) fins per inch. These tubes shall be "rolled" securely into glass-lined, cast iron headers. There shall be no bolts, gaskets or "O" rings in the head configuration. Removable access plugs shall be provided on the heat exchanger headers for the purposes of inspection, cleaning or repair. Boiler drains shall be provided, having external access. The heat exchanger shall be mounted in a stress free jacket assembly in order to provide a "free floating design" able to withstand the effects of thermal shock. The BOILER shall bear the ASME "H" stamp for 160 PSI working pressure and shall be National Board listed. The complete heat exchanger assembly shall carry a ten (10) year limited warranty against failure caused by defective workmanship or material.
The BOILER shall be equipped to accept return water temperatures as low as 50F with specified minimum set point temperatures of auxiliary piping or preheat loops.
The BOILER shall be supplied with a circulating pump wired for (intermittent) (continuous) operation. Installations shall require primary/secondary piping to reduce overall head loss in the heating system. Secondary circulators will operate intermittently to prevent radiant heat loss due to water circulation through BOILERS in the off mode.
The combustion chamber shall be constructed of stainless steel and sealed for combustion employing the Lochinvar fully condensing power burner concept. The burner surface shall be constructed of high temperature aluminum/chromium alloy woven mesh and fire in a vertical plane within the combustion chamber. The burner shall employ a special perforated flame injection tube extending the entire length of the heat exchanger. A five-year warranty from the BOILER manufacturer must be provided. The burner must be capable of firing at both a complete blue flame with maximum gas and air input as well as firing infrared when gas and air are reduced. Burner must be capable of firing at 100% of rated output when supplied with 4 inches water column of inlet gas pressure, so as to maintain service under heavy demand conditions, no exceptions. The burner shall fire in a full 360-degree pattern resulting in uniform heat transfer upon every inch of heating surface. A viewing port shall be provided, permitting visual observation of burner operation.
The hot water BOILER shall use a combustion air blower to precisely control the fuel/air mixture for maximum efficiency. The all aluminum blower will be mounted on the burner and draw gas and air from a premixing chamber. Utilization of a variable frequency drive will enable the blower to infinitely vary its’ speed, therefore adjusting the volume of gas and air supplied for combustion. The boiler shall operate between 25 percent and 100 percent of rated output. The combustion air blower shall operate for a prepurge period before burner ignition and a postpurge period after burner operation to clear the combustion chamber.
The BOILER shall be constructed with a 16 gauge galvanized steel jacket assembly. The interior of the combustion chamber and flue collector shall be constructed completely of stainless steel so as to ensure corrosion protection. All inner and outer jacket panels shall be fully gasketed and sealed. The exterior of the jacket assembly shall be primed and pre-painted on both sides with a minimum dry film thickness of 0.70 mils. All models shall be certified for installation on combustible floors without additional safety provisions.
The BOILER shall be designed to allow field installation of multiple venting options. The BOILER shall be vented (with a vertical positive draft, Category IV vent system drawing combustion air from the equipment room) (with a horizontal positive draft, Category IV vent system drawing combustion air from the equipment room. The sidewall vent cap shall be supplied by Lochinvar) (with a horizontal Direct Vent system using a two pipe system installed with Category IV vent pipe and a separate air inlet pipe both terminating on the sidewall. The sidewall vent and air inlet caps shall be supplied by Lochinvar) (with a vertical Direct Vent system using a two pipe system installed with Category IV vent pipe and a separate air inlet pipe. The rooftop vent and air inlet caps supplied by installing contractor) (with a horizontal Intelli-Vent system using a two pipe system installed with Category IV vent pipe where flue products are vented to a sidewall with a positive draft and combustion air is drawn from the roof. The sidewall vent cap shall by supplied by Lochinvar)(with a vertical Intelli-vent system using a two pipe system installed with Category IV vent pipe where flue products are vented to the roof top and combustion air is drawn from the sidewall. The sidewall air inlet cap shall be provided by Lochinvar.) A Direct Vent System shall terminate both the flue outlet and the combustion air inlet in the same pressure zone on the building exterior surface. An Intelli-Vent system shall terminate both the flue outlet and the combustion air inlet in the different pressure zones on the building exterior.
The BOILER shall be certified and listed by C.S.A. International under the latest edition of the harmonized ANSI Z21.13 test standard for the US and Canada. The BOILER shall comply with the energy efficiency requirements of the latest edition of the ASHRAE 90.1 Standard. The BOILER shall operate at up to 97% thermal efficiency.
The BOILER shall be equipped with an interface controller with a microprocessor based platform incorporating unique software customized for operation of the Lochinvar Intelli-Fin. The controller shall be compatible with LonWorks® building management systems. All internal safety, operating and ignition controls shall interface with the microprocessor controller. The BOILER interface control shall provide on/off control of the gas supply to the burner, operation of the VFD to control the variable speed combustion air blower, interface with the ignition control system, on/off control of the integral circulating pump, operation of the floating point bypass valve, control of water temperature set points, and monitoring of all safety functions. Local communication, programming and display of operating and alarm status conditions shall be accessible through a digitaldisplay panel. The digital panel shall display 21 data points on each unit an be capable of monitoring up to 16 individual units. Displayed data points include temperature, unit operation status, operational sensor location, total run time, (sequencing operation – optional), and firing rate. The digital display panel may be optionally remote mounted and communicate with the BOILER(S) via
a twisted pair cable connection. The BOILER interface control shall serve as an operating temperature control to track demand and regulate the amount of heat added to the system to meet hot water demand. The BOILER interface control shall be capable of varying burner input from 25 percent up to 100 percent of rated input. Burner input may vary in steps as small as 1 percent of input allowing up to 75 adjustable steps while tracking the hot water demand. Access to the BOILER interface controller shall be made by a wiring harness with unique multiple pin terminations for each connection point. Access to the BOILER interface controller to adjust settings shall be limited by a changeable password system entered through the digital display panel.
Standard operating controls shall include an adjustable immersion type, digital temperature controller and an immersion safety, adjustable manual reset high limit to regulate boiler water temperatures. Multiple air pressure switches shall be provided to prove operation of the combustion air fan, monitor combustion chamber pressures and monitor operation of the flue.
The standard control system shall include an electronically proven Hot Surface Ignition system with full flame monitoring capability. Additional standard controls shall include a low voltage transformer for the control circuit, a flow switch to prove water flow, inlet and outlet temperature displays, and a factory installed ASME pressure relief valve. The manufacturer shall verify proper operation of the burners, all controls and the heat exchanger by connection to gas, water and venting for a full factory fire test prior to shipping. A quality test report shall be shipped with each unit.
The units control panel shall contain a lighted on/off main power switch, alarm light and audible silence switch, and a high temperature alarm light. A central monitor for all BOILERS shall be provided. This monitor will provide a digital display of 21 data points on each unit and be capable of monitoring up to 16 individual units. Displayed data points include temperatures, unit operation status, (outdoor air reset programming -optional), operational sensor location, total run time, (sequencing operation – optional), and firing rate. A 24 VAC control circuit and components shall be used in conjunction with a 24-volt circuit breaker. All components shall be easily accessed and serviceable from the front and top of the unit. All wiring harness connections shall have multipin plug in type connectors to ease service, troubleshooting and reduce removal and replacement cost.
The BOILER shall be capable of two-way communication on a LonWorks® building management network. The boiler shall be provided with a terminal strip for easy communication wiring. (Remote diagnostic and operation information utilizing a personal computer shall be provided via the LonWorks® network connection. Temperatures, unit operation status, outdoor air reset programming, operational sensor location, total run time, sequencing operation, and firing rate shall be visible using the remote connection, adjustment of changeable points is required. Monitoring only is unacceptable.) (Remote diagnostic and operation information utilizing a personal computer shall be provided via phone line, modem and translation hardware package, provided by Lochinvar. Temperatures, unit operation status, outdoor air reset programming, operational sensor location, total run time, sequencing operation, and firing rate shall be visible using the remote connection, adjustment of changeable points is required. Monitoring only is unacceptable.)
The multiple BOILER plant shall be sequenced using a (First on Last Off arrangement) (First on First Off arrangement with lead-lag) (run-time equalization arrangement) (efficiency optimization arrangement). A two-wire connection between each BOILER and the sequencer in a “daisy chain” arrangement will provide all necessary wiring (wiring performed by others).
First on Last off will energize BOILER #1 upon a call for heat, additional BOILERS will be energized in numbered order to meet the heat demand. Once demand is satisfied the boilers will be shutdown in reverse order with #1 being the last to shut down.
First on First off will energize BOILER #1 upon a call for heat, additional BOILERS will be energized in numbered order to meet the heat demand. Once demand is satisfied the boilers will be shutdown in the same order in which they were started with #1 being shutdown first. This operation will include lead-lag. Lead-lag will rotate the lead boiler among all available boilers in an effort to equalize run-time.
Run Time Equalization will direct BOILER without regard to numbered sequence and focus only on run-time hours. Upon a call for heat the sequencer will look at the total run-time for each unit and identify and select the unit with the least total hours to be the lead boilers. Additional BOILERS will be energized utilizing an identical selection process.
Efficiency Optimization will energize boilers and control firing rate to maximize the efficiency of the entire boiler plant. The sequencing control will first determine building heat load. Then it will calculate the optimum available firing rate based on the number of boilers available for operation. Finally the control will energize the selected number of boilers and fix their firing rate to match system demand while maximizing efficiency.
Maximum unit dimensions shall be: Length ______inches, Width ______inches and Height ______inches. Maximum unit weight shall be______pounds.
The hot water BOILER shall have an independent laboratory rating for Oxides of Nitrogen (NOx) of less than 20 ppm corrected to 3% O2.
The Firing Control System shall be ______(Options Below).
M-9Infinitely Proportional Hot Surface Ignition with Electronic Supervision (Standard)
M-13GE GAP/FM/IRI
M-7 - CaliforniaCode.
Minnesota Code
Massachusetts Code
Kentucky Code
CSD-1Note: Due to the discrepancy in CSD-1 requirements from state to state, please confirm to the factory all controls required in your jurisdiction.
02/07– Printed in U.S.A.