DOCX《Typical Specification》

Typical Specification FBN-SPEC-01 Typical Specification for Lochinvar? Crest Heating Boiler Models 1,500,000 C 3,500,000 Btu/Hr The BOILER shall be a LOCHINVAR Crest Model FB(N,L)having a modulating input rating of Btu/Hr, an output of Btu/Hr and shall be operated on (Natural Gas) (L.

P. Gas). The BOILER shall be capable of full modulation with a turndown ratio of ___:1. Maximum unit dimensions shall be: Length ________inches, Width ________inches and Height inches. Maximum operating (wet) unit weight shall be_pounds. The BOILER shall bear the ASME "H" stamp for

160 psi working pressure and shall be National Board listed. There shall be no banding material, bolts, gaskets or "O" rings in the header construction. The BOILER shall have a 316L stainless steel, fire tube heat exchanger. The heat exchanger shall be designed for a single-pass, flow through design and will drain condensation to the bottom of the vessel. The complete heat exchanger assembly shall carry a ten (10) year limited warranty. 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 U.S. and Canada. The BOILER shall comply with the energy efficiency requirements of the latest edition of the ASHRAE 90.1 Standard and the minimum efficiency requirements of the latest edition of the ASHRAE

103 Standard. The BOILER shall operate at a minimum of 92% thermal efficiency at full fire as registered with AHRI. All models shall operate up to 98% thermal efficiency with return water temperatures at 90°F or below. The BOILER shall be certified for indoor installation. The BOILER shall be constructed with a heavy gauge steel jacket assembly, primed and pre-painted on both sides. The combustion chamber shall be sealed and completely enclosed, independent of the outer jacket assembly, so that integrity of the outer jacket does not affect a proper seal. A burner/flame observation port shall be provided. The burner shall be a premix design and constructed of high temperature stainless steel with a woven metal fiber outer covering to provide modulating firing rates. The BOILER shall be supplied with a gas valve designed with negative pressure regulation and be equipped with a variable speed blower system, to precisely control the fuel/air mixture to provide modulating boiler firing rates for maximum efficiency. The BOILER shall operate in a safe condition at a derated output with gas supply pressures as low as

4 inches of water column. The burner flame shall be ignited by spark ignition with flame monitoring via a flame sensor. The BOILER shall utilize a

24 VAC control circuit and components. The control system shall have a Liquid Crystal touch screen display for boiler set-up, boiler status, and boiler diagnostics. All components shall be easily accessed and serviceable from the front of the jacket. The BOILER shall be equipped with a temperature/pressure gauge;

high limit temperature control with manual reset;

ASME certified pressure relief valve set for

50 psi (standard);

outlet water temperature sensor;

return water temperature sensor;

outdoor air sensor, flue temperature sensor;

high and low gas pressure switches, low water cut off with manual reset and a condensate trap for the heat exchanger condensate drain. The BOILER shall feature the "SMART TOUCH?" control with a Liquid Crystal touch screen display, password security, outdoor air reset, pump delay with freeze protection, pump exercise, domestic hot water prioritization and PC port connection. The BOILER Shall have alarm contacts for any failures, runtime contacts and data logging of runtime, ignition attempts and ignition failures. The BOILER shall allow 0-10 VDC input connection for BMS control and have built-in "Cascade" to sequence and rotate while maintaining modulation of up to eight boilers without utilization of an external controller. The control may be compatible with optional Modbus communication. The BOILER shall be equipped with two terminal strips for electrical connection. A low voltage connection board with