Frequently asked questions (FAQs) about temperature controls
What are temperature controls used for in industrial refrigeration systems?
Temperature controls monitor and regulate temperature in industrial refrigeration systems. They can help control compressors, evaporator fans, defrost cycles, alarms, heaters, and other connected equipment based on a set temperature range.
What is the difference between electronic and mechanical temperature controls?
Electronic temperature controls use sensors, displays, and digital settings to manage temperature more precisely. Mechanical controls typically use a bulb and capillary or similar sensing method to open or close contacts based on temperature changes.
How do I choose the right temperature control?
Start by matching the voltage, temperature range, control action, number of circuits, switch type, capillary length, sensor style, enclosure rating, and reset type. If you are replacing an existing control, the manufacturer part number is usually the best starting point.
What does SPST or SPDT mean on a temperature control?
SPST means single pole, single throw, which opens or closes one circuit. SPDT means single pole, double throw, which can switch between two circuits. The right option depends on how the control is wired into your refrigeration system.
What is a remote bulb temperature control?
A remote bulb temperature control uses a sensing bulb connected by a capillary tube. The bulb is placed where temperature needs to be measured, while the control body can be mounted in a more accessible location.
When should I use a manual reset temperature control?
Manual reset temperature controls are often used in safety or limit applications where the system should not restart automatically after reaching a certain temperature condition. A technician must manually reset the control before operation resumes.
Are digital temperature and defrost controllers better than standard temperature controls?
Digital temperature and defrost controllers can offer more precise settings, easier monitoring, and better control over refrigeration and defrost cycles. Standard mechanical controls may still be preferred for simpler systems, direct replacements, or applications where digital features are not required.
Can I replace a Penn temperature control with another brand?
You can sometimes replace a Penn temperature control with another brand, but the replacement must match the electrical rating, temperature range, sensor type, switch action, mounting requirements, and application. For industrial refrigeration systems, it is best to compare the full specifications before switching brands.
Do temperature controls work with ammonia refrigeration systems?
Some temperature controls can be used in ammonia refrigeration systems, but compatibility depends on the application, installation location, enclosure, sensor type, and system design. Always confirm the product specifications before installing a control in an ammonia refrigeration environment.
What brands of temperature controls do you carry?
We carry industrial refrigeration temperature controls from manufacturers such as Penn, Sporlan, Vilter, and Hansen. The current collection includes a wide selection of Penn temperature controls, along with digital, defrost, and OEM replacement options.
