also identified as the XB1019MW551B

and a 3-blade design

Precision Pilot Operation: Minimum pressure differential required for shifting is minimized to ensure reliable cycle changeover in low ambient conditions

When troubleshooting furnace ignition failure or a lazy pilot flame that won't stay lit

5" x 4" mounting footprint fits most standard fractional horsepower compressor brackets

Johnson Controls T-3111-6 Pneumatic Thermostat Els PW 29614 also identified as the XB1019MW551BThe Johnson Controls T 3111 6 Pneumatic Thermostat is a heavy duty, direct acting controller engineered for proportional management of steam or water valves in terminal air conditioning units. As a veteran preferred valve top mounting thermostat, this unit integrates a high sensitivity averaging bulb element (8 foot sensing area) to ensure precise environmental regulation by mitigating the effects of air stratification. Designed for "single