Siemens Combustion QRA4M.U Scanner 319847-401 the blade rotates to the

the blade rotates to the left

this Slimline Series controller handles complex HVAC configurations

Supports a broad operating range of 100°F to 200°F

Durable Construction: Features a Noryl gray enclosure to protect internal components from dust and mechanical damage in demanding mechanical rooms

Patching a cracked AC drain pan is often a temporary fix that leads to repeat service calls once the sealant fails under thermal expansion

Siemens Combustion QRA4M.U Scanner 319847-401 the blade rotates to theThe Siemens Combustion QRA4M. U is a high sensitivity UV flame scanner engineered for the rigorous supervision of gas or oil flames and ignition spark proving in intermittent burner operations. As a veteran grade flame detector, this sensor utilizes a specialized UV sensitive cell with two electrodes designed to ignite upon detecting radiation within the 190 to 270 nm spectral range. This ignition triggers the necessary current in the flame detector