The Johnson Controls T-5500-1052 is a professional-grade pneumatic temperature indicator designed for precision monitoring in HVAC pneumatic control systems

Reliable Signal Communication: Maintains high-speed data transmission between the indoor and outdoor sections for consistent climate control

promoting rapid burner light-off and reducing ignition module lockout errors

These condensing boilers operate with positive pressure in the combustion chamber

always match the valve to the refrigerant type indicated on the unit nameplate

Armstrong Fluid Technology 806168-001 Coupler R-448A The Johnson Controls T-5500-1052 isThe Armstrong Fluid Technology 806168 001 Coupler is a precision engineered OEM replacement part designed for high performance circulator pumps. Constructed from durable cast iron, this 4 spring type coupler is specifically manufactured to facilitate a secure, vibration dampening connection between the motor and the pump shaft. It is a critical component for maintaining the operational integrity of Armstrong S 45 and S 46 models within hydronic