The performance of a cooling tower is very dependent on outdoor wet-bulb temperature. See equation 17.3 on pg 977 in V8.8 Engineering Reference. However, if there is a set point temperature on the condenser loop, the tower should control to that temperature. Also read section 17.1.1.4 Calculating the Actual Exiting Water Temperature and Fan Power on pg 980.

CondenserLoop,
  Chilled Water Condenser Loop,  !- Name
  Water,                         !- Fluid Type
  ,                              !- User Defined Fluid Type
  Tower Loop Operation,          !- Condenser Equipment Operation Scheme Name
  Condenser Supply Outlet Node,  !- Condenser Loop Temperature Setpoint Node Name

The performance of a cooling tower is very dependent on outdoor wet-bulb temperature. See equation 17.3 on pg 977 in V8.8 Engineering Reference. However, if there is a set point temperature on the condenser loop, the tower should control to that temperature.

CondenserLoop,
   Chilled Water Condenser Loop,  !- Name
  Water,   Water,                   !- Fluid Type
  ,   ,                        !- User Defined Fluid Type
   Tower Loop Operation,     !- Condenser Equipment Operation Scheme Name
   Condenser Supply Outlet Node,  !- Condenser Loop Temperature Setpoint Node Name