Attachment 1 - Raypak Boiler Specs.pdf

This document details specifications for a Raypak MVB (Modulating Vertical Hydronic) Boiler, Model # H7-503A, designed for indoor natural gas hydronic applications. The boiler features 500 MBH input with 431 MBH output, cast iron headers, a copper heat exchanger, and 86.2% thermal efficiency, with key technical capabilities including electronic modulation with a 7:1 turndown ratio, VERSA IC integrated controller with a 7" color touchscreen, and Raymote remote connectivity. Additional specifications include a 60 PSIG pressure relief valve, capability to cascade up to 8 boilers without an external sequencer, Modbus RTU BMS port, and SCAQMD Rule 1146.2 certification with low NOx emissions under 20 ppm.

The boiler has precise operational parameters, including a maximum outlet water temperature of 235°F, a minimum acceptable inlet water temperature of 120°F, and features like a 3-try stand ignition, F-10 LWCO fixed manual reset high limit, condensate unit, cast iron pump, and full safety diagnostics with status display lights. These comprehensive specifications align with the Air Force Air Combat Command's solicitation (FA480925Q0094) for an HVAC boiler replacement, which specifically requires this Raypak MVB Boiler model for installation.