A customer has 58MVB with Infinity SYSTXCCUIZ01,SYSTXCC4ZC01, etc., consider to add cheaper aircon solution (say single stage). Any model has ABCD bus that can be directly connected to the damper controller? if not, can I just use normal condenser with Infinity SYSTXCCNIM01 w/o OAT? if OAT must be used, does any RRS will do or any specified model #? thanks for help