Siemens Combustion QRA4M.U Scanner L99H008 this 3amp control board coordinates

this 3amp control board coordinates indoor and outdoor units to maintain precise temperature setpoints across four independent zones

Remember to recalibrate the calibration screw in the center of the gas cock plug if the housing is repositioned

Extended Reach: The factory-terminated 32-foot shielded cable reduces the need for field-splicing

Common Questions What does the 802003272 relay protect against

The HH18HA286 is typically an automatic reset temperature switch

Siemens Combustion QRA4M.U Scanner L99H008 this 3amp control board coordinatesThe 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