In oil heating systems, what does ZR stand for?

In oil heating systems, ZR stands for Zone Request. This term refers to a signal that indicates a request for heating in a specific zone of a building. When a thermostat in a designated zone detects that the temperature has dropped below a set point, it sends a zone request to the heating system. This helps to ensure that the correct areas receive heat as needed, enhancing comfort and energy efficiency.

This systematic approach to heating not only optimizes the use of energy but also helps maintain a more consistent and comfortable indoor climate by allowing for targeted heating in different zones based on individual requirements. Understanding terms like Zone Request is crucial for technicians as it aids in effectively troubleshooting and managing zoned heating systems.