Daikin-McQuay 073301001 Relay Purge Timer 30 Second Burner Control

The Daikin-McQuay 073301001 is a genuine OEM 30-second relay purge timer designed for use with McQuay and Daikin Applied commercial HVAC burner control systems. This purge timer works in conjunction with the RM7897 series burner control module and its associated sub-base to provide a timed pre-ignition purge sequence.

The purge timer enforces a mandatory 30-second delay period before fuel flow and ignition are initiated. During this purge interval, the system blower is energized to clear any residual fuel vapor from the burner area, eliminating the risk of an uncontrolled ignition event and ensuring safe, reliable burner startup.

Key Features:

• 30-second purge delay for safe burner pre-ignition sequencing
• Genuine Daikin-McQuay OEM replacement part
• Compatible with RM7897 series burner control systems
• Required for all Canadian-standard compliant McQuay units
• Direct replacement; installs with existing burner control sub-base wiring
• Part numbers 073301002 (90 sec) and 073301003 (60 sec) available for other timer durations

This 30-second timer is the correct selection for standard (non-hi turn-down) McQuay units and is mandatory for all Canadian CSA-compliant installations. Refer to Daikin Applied Parts Bulletin PB0107 for full compatibility and installation guidance. For units with hi turn-down capability, the 60-second timer (part # 073301003) is required.