Every unit is factory sealed to maintain calibration and prevent unauthorized tampering

this unit replaces legacy part numbers including R44431-001 and satisfies the rigorous venting requirements of residential HVAC equipment

Built to exact Johnson Controls specifications

maintaining switch integrity over high cycle counts

delivering precise modulating control within a temperature range of 41°F to 230°F

Siemens Combustion AZL52.00B1 Programming Display 318820-201 Every unit is factory sealedThe Siemens AZL52. 00B1 is the definitive burner management system interface for professionals working with LMV5 linkageless control platforms. This programming unit functions as a detached human machine interface (HMI), providing senior burner technicians with direct access to critical fuel air ratio control parameters and real time combustion diagnostics. Built for flush panel mounting, the AZL52. 00B1 features a backlit 4x16 character LCD and an