Manual operating setpoint of the ARU, which is set on the
panel of the ARU. If the ARU doesn't have a manual ,
the OID will always return a value of aruRem (10).
NOTE: -1 will be returned if the ARU is not communicating.
Values are represented in whole number degrees or kW.
If the manual setpoint is set to Remote, or if the ARU doesn't
have a manual switch, this OID will return aruRem.