scope:

This standard sets performance requirements for combustion safeguards and flame sensing systems used as safety controls for commercial and industrial heating equipment. They may be independent non- programmable or programmable.

Note: A programmable combustion safeguard is one that allows a limited selection of safety parameters such as purge, trial for ignition, and flame failure response time. Programmable logic controllers used for burner management are not included in this standard.

A combustion safeguard is a device intended to provide safe start, safe operation, and safe shutdown under normal or abnormal conditions. This device is used in conjunction with a flame sensing system.

A flame sensing system detects the presence and absence of flame. It may be of the flame rectification, infra-red, or ultra-violet type. Sensors may be capable of monitoring coal, gas, and/or oil flames, and are a primary component of a combustion control system.

The requirements of this standard shall be used to measure and describe the performance of combustion safeguards and flame sensing equipment in response to exposure from heat, cold, abnormalities, etc., under controlled laboratory conditions. The results of these controlled exposures shall not be used to describe or appraise actual exposure conditions since such conditions will vary widely.

Purpose

This standard states testing and certification criteria for combustion safeguards and flame sensing systems.

Testing and certification criteria may include, but are not limited to, performance requirements, marking requirements, examination of manufacturing facility(ies), audit of quality assurance procedures, and a surveillance program.