exceeding ISO 8573

this control ensures high-side and low-side stability

allowing for real-time monitoring of burner status and diagnostic codes from a convenient location on the control cabinet door

This unit is specifically calibrated for the FT-15 series and should not be used on FT-30

Featuring a 57 Cv rating

Resideo QVU8143A3231 Rebuild Kit 321894-708 exceeding ISO 8573When you are dealing with a leaking or stuck VU53 series fan coil valve, the Resideo QVU8143A3231 Rebuild Kit is the professional grade solution to restore factory performance without cutting into the piping. This OEM Honeywell Resideo repair kit is designed for 1 2 inch to 1 inch normally closed fan coil valves, providing a direct internal replacement compatible with VU52, VU53, and VU54 bodies. Built for high cycle hydronic applications, this