Where is the best placement for the thermostat in a walk in freezer?

In the return air slightly below the bottom of the coil. I did Super Market refrigeration 30 years before moving to Building Automation.

Is this single pole double throw? (spdt)?

It's been a while since I installed it but I'm pretty sure it's SPST. Used on walk in cooler.

does this unit have Compressor Delay Protection?

Ki-Jin Yoon, Thank you for your question. The Johnson Controls A421 is an electronic temperature control that includes an “Anti-Short Cycle Time Delay”. The below link is to the A421 page with some literature embedded on the page. Please let us know if you have any further questions. https://www.amazon.com/Johnson-Controls-Electronic-Temp-Control/dp/B07GB543Y7 -Johnson Controls

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CECOMINOD078043 A19ABA-40C Line V Mechanical Thermostat, 120 to 277 VAC

Product ID: 22807461

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Details

Brand
Johnson
Model Name
A19ABA-40C
Product Dimensions
2.3"D x 10.6"W
Controller Type
Push Button
Color
Silver

🔧Compact design

⚙️Adjustable settings

🌡️Wide temp range

Description

🌟 Elevate Your Comfort Game!

RELIABLE PERFORMANCE - Enjoy constant differential throughout the entire range, ensuring consistent and dependable temperature management.
SLEEK AND COMPACT DESIGN - The compact enclosure fits seamlessly into any space, making it a stylish addition to your setup.
VERSATILE SENSING OPTIONS - Select from a variety of sensing element styles to match your unique application requirements.
PRECISION TEMPERATURE CONTROL - Experience a wide temperature range from 120 to 277 VAC, ensuring optimal comfort in any environment.
CUSTOMIZABLE DIFFERENTIAL SETTINGS - Choose between fixed or adjustable differentials to tailor your thermostat to your specific needs.

The Johnson Controls CECOMINOD078043 A19ABA-40C Line V Mechanical Thermostat offers a wide temperature range of 120 to 277 VAC, featuring a compact design, customizable differential settings, and various sensing element styles for versatile applications. Perfect for professionals seeking reliable and precise temperature control.

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