Johnson Controls A19AAA-49 Utility Thermostat 320720-756 a reduced pressure zone (RPZ)

a reduced pressure zone (RPZ) assembly is required by most codes

the C12 series provides the physical reach and durability needed for complex cabinet installs

You will simply have an additional speed tap available for more granular airflow adjustment

Substantial Capillary Reach: The 36-inch capillary tube provides flexibility for remote mounting in complex control panels

the adjustable sensitivity—ranging from 1/4 to 4 psi per 1% RH—allows for the fine-tuning required for stable pneumatic calibration

Johnson Controls A19AAA-49 Utility Thermostat 320720-756 a reduced pressure zone (RPZ)The Johnson Controls A19AAA 49 Utility Thermostat is a technician grade single pole, single throw (SPST) control designed for heavy duty HVAC R applications. Engineered to open on temperature drop, this low limit control is essential for preventing freeze ups in refrigeration systems and maintaining setpoint integrity in walk in coolers and industrial storage units. It features a wide temperature range of 30F to 100F ( 34C to 38C), making it a