Thank you for purchasing a URD from EWC Controls. Tech support is available at 800-446-3110.
Here are some useful documents:
URD
Submittal Sheet – URD w/ Current Version Motor MA-ND5
YouTube Video demonstrating motor replacement
Special Situation Wiring Instructions:
URD used with a Steve Co/White Rodgers relay and thermostat
URD – Used with an auto-changeover thermostat
URD – Wired with an SPDT switch
URD – Wired as fresh air intake
URD – Wired with an EWT and TSB
URD – Wired as fresh air intake — restricted
URD – Wired with a model SMD style damper
URD – Used with a Steve Co relay and thermostat
URD Dampers used w/ CO2 Monitor
URD – Multiple system & Damper Combustion Air Set-up
URD – Additional Damper wired for Zones 2 & 3
URD – Wired to “OPEN” on Cool Operation Only
URD Any Heat/Cool Thermostat w/ Sub-base – Recommended Configuration