Specification for Thermal Solutions Apex Condensing Hot Water Boiler Models APX 425C, 525C, 625C, 725C, 825C

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Technical specification describing construction requirements, performance characteristics, control system functions, installation conditions, compliance standards, and warranty provisions for Thermal Solutions Apex condensing hot water boilers used in indoor space-heating systems.

Document type: Technical specification

Product type: Condensing hot water boiler for indoor space-heating

Manufacturer: Thermal Solutions

Product line: Apex Condensing Boiler

Models: APX 425C, APX 525C, APX 625C, APX 725C, APX 825C

Applicable standards: ANSI Z21.13; CSA 4.9; ASME Section IV Boiler and Pressure Vessel Code; ASME CSD-1; ASHRAE Standard 90.1; NFPA 54 National Fuel Gas Code; Hydronics Institute BTS-2000

Certification: Intertek ETL certification

Maximum allowable working pressure: 160 PSI

Factory hydrostatic test pressure: 240 PSIG

Heat exchanger material: 316L stainless steel

Boiler design: Water tube condensing boiler

Burner type: Pre-mix metal-mesh forced draft burner with 5:1 turndown

Control system: Integrated boiler control system for up to eight modulating boilers and circulation pumps

Installation environment: Indoor mechanical installation

Warranty heat exchanger: 10-year pro-rated warranty

Warranty other parts: 1-year limited warranty

Associated documentation: Contract drawings, equipment schedule, installation and start-up instructions, operation and maintenance manuals

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