Relay Board 17800B Series Contains the system relays for the vacuum pump and both compressors. Also contains the rectifier bridge and capacitor for the oil-less compressor.
Robinair does not warrant any "RA" repair item not installed by an Authorized Service Center.

Warning: This product may expose you to chemicals including lead which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov