Index: firmware/App/Modes/ModeRecirculate.c
===================================================================
diff -u -rf308cc4c35eab630ebbbde405cfe47d049afeafb -ra1b8dbb69c4bd2f0cc22e62bede7015c9307d378
--- firmware/App/Modes/ModeRecirculate.c	(.../ModeRecirculate.c)	(revision f308cc4c35eab630ebbbde405cfe47d049afeafb)
+++ firmware/App/Modes/ModeRecirculate.c	(.../ModeRecirculate.c)	(revision a1b8dbb69c4bd2f0cc22e62bede7015c9307d378)
@@ -9,7 +9,7 @@
 * @file ModeRecirculate.c
 *
 * @author (last) Quang Nguyen
-* @date (last) 13-Aug-2020
+* @date (last) 24-Aug-2020
 *
 * @author (original) Sean
 * @date (original) 04-Apr-2020
@@ -18,6 +18,7 @@
 
 #include "etpwm.h"
 
+#include "ConcentratePumps.h"
 #include "ConductivitySensors.h"
 #include "DrainPump.h"
 #include "FPGA.h"
@@ -27,9 +28,10 @@
 #include "Pressures.h"
 #include "ROPump.h"
 #include "TaskGeneral.h"
+#include "TemperatureSensors.h"
 #include "Timers.h"
+#include "UVReactors.h"
 #include "Valves.h"
-#include "TemperatureSensors.h"
 
 /**
  *  @addtogroup DGRecirculateMode
@@ -38,9 +40,12 @@
 
 // ********** private definitions **********
 
-#define TARGET_RO_PRESSURE_PSI          120                    ///< Target pressure for RO pump.
-#define FLUSH_LINES_VOLUME_L            0.1                    ///< Water volume (in Liters) to flush when starting re-circulate mode.
+#define TARGET_RO_PRESSURE_PSI                  130                    ///< Target pressure for RO pump.
+#define TARGET_RO_FLOW_RATE_L                   0.3                    ///< Target flow rate for RO pump.
 
+#define TARGET_FLUSH_LINES_RO_FLOW_RATE_L       0.6                    ///< Target flow rate for RO pump.
+#define FLUSH_LINES_VOLUME_L                    0.1                    ///< Water volume (in Liters) to flush when starting re-circulate mode.
+
 // ********** private data **********
 
 static DG_RECIRCULATE_MODE_STATE_T recircState;                ///< Currently active re-circulation state.
@@ -54,10 +59,9 @@
 
 /*********************************************************************//**
  * @brief
- * The initRecirculateMode function initializes the Fill Mode module.
- * @details
- * Inputs : none
- * Outputs : Fill Mode module initialized.
+ * The initRecirculateMode function initializes the re-circulate mode module.
+ * @details Inputs: none
+ * @details Outputs: Re-circulate mode module initialized
  * @return none
  *************************************************************************/
 void initRecirculateMode( void )
@@ -68,11 +72,9 @@
 
 /*********************************************************************//**
  * @brief
- * The transitionToRecirculateMode function prepares for transition to \n
- * fill mode.
- * @details
- * Inputs : none
- * Outputs : recircState
+ * The transitionToRecirculateMode function prepares for transition to re-circulate mode.
+ * @details Inputs: none
+ * @details Outputs: Re-initialized re-circulate mode
  * @return none
  *************************************************************************/
 void transitionToRecirculateMode( void )
@@ -86,11 +88,16 @@
     setValveState( VRC, VALVE_STATE_DRAIN_C_TO_NO );
     setValveState( VDR, VALVE_STATE_DRAIN_C_TO_NO );
     setValveState( VPO, VALVE_STATE_NOFILL_C_TO_NO );
-    setROPumpTargetPressure( TARGET_RO_PRESSURE_PSI, PUMP_CONTROL_MODE_CLOSED_LOOP );
+    setROPumpTargetFlowRate( TARGET_FLUSH_LINES_RO_FLOW_RATE_L, TARGET_RO_PRESSURE_PSI );
     signalDrainPumpHardStop();
     startPrimaryHeater();
+    requestConcentratePumpsOff( CONCENTRATEPUMPS_CP1_ACID );
+    requestConcentratePumpsOff( CONCENTRATEPUMPS_CP2_BICARB );
+
     // UV on
-    // conc. pumps off
+    turnOnUVReactor( INLET_UV_REACTOR );
+    turnOnUVReactor( OUTLET_UV_REACTOR );
+
 #ifndef _VECTORCAST_
     {   // TODO - test code to start the fan since we're turning the heater on
         F32 fanPWM = 0.25;
@@ -102,18 +109,18 @@
 
 /*********************************************************************//**
  * @brief
- * The execRecirculateMode function executes the Re-circulate Mode state machine.
- * @details
- * Inputs : recircState
- * Outputs : recircState
+ * The execRecirculateMode function executes the re-circulate mode state machine.
+ * @details Inputs: recircState
+ * @details Outputs: Check water quality, re-circulate mode state machine executed
  * @return current state
  *************************************************************************/
 U32 execRecirculateMode( void )
 {
-    // check inlet water conductivity, temperature, and pressure
-    checkInletWaterConductivity( recircState );
+    // check inlet water conductivity, temperature, pressure, and RO rejection ratio
+    checkInletWaterConductivity();
     checkInletWaterTemperature();
     checkInletPressure();
+    checkRORejectionRatio();
 
     // execute current re-circulate state
     switch ( recircState )
@@ -135,7 +142,7 @@
             break;
 
         default:
-            SET_ALARM_WITH_2_U32_DATA( ALARM_ID_DG_SOFTWARE_FAULT, 0, recircState )     // TODO - add s/w fault enum to 1st data param
+            SET_ALARM_WITH_2_U32_DATA( ALARM_ID_DG_SOFTWARE_FAULT, SW_FAULT_ID_RECIRC_MODE_INVALID_EXEC_STATE, recircState )
             recircState = DG_RECIRCULATE_MODE_STATE_START;
             break;
     }
@@ -145,11 +152,10 @@
 
 /*********************************************************************//**
  * @brief
- * The handleCheckInletWaterState function executes the flush lines \n
- * state of the Re-circulate Mode state machine.
- * @details
- * Inputs : none
- * Outputs :
+ * The handleFlushLinesState function executes the flush lines state of the
+ * re-circulate mode state machine.
+ * @details Inputs: none
+ * @details Outputs: Integrate volume of water moved through line
  * @return the next state
  *************************************************************************/
 static DG_RECIRCULATE_MODE_STATE_T handleFlushLinesState( void )
@@ -165,6 +171,7 @@
     if ( flushLinesVolumeL >= FLUSH_LINES_VOLUME_L )
     {
         setValveState( VDR, VALVE_STATE_RECIRC_C_TO_NC );
+        setROPumpTargetFlowRate( TARGET_RO_FLOW_RATE_L, TARGET_RO_PRESSURE_PSI );
         result = DG_RECIRCULATE_MODE_STATE_RECIRC_WATER;
     }
 
@@ -173,11 +180,10 @@
 
 /*********************************************************************//**
  * @brief
- * The handleRecircProductWaterState function executes the re-circulate \n
- * water state of the Re-circulate Mode state machine.
- * @details
- * Inputs : none
- * Outputs :
+ * The handleRecircWaterState function executes the re-circulate water state
+ * of the re-circulate mode state machine.
+ * @details Inputs: none
+ * @details Outputs: none
  * @return the next state
  *************************************************************************/
 static DG_RECIRCULATE_MODE_STATE_T handleRecircWaterState( void )
@@ -189,11 +195,10 @@
 
 /*********************************************************************//**
  * @brief
- * The handleRecircPauseState function executes the pause state of the \n
- * Re-circulate Mode state machine.
- * @details
- * Inputs : none
- * Outputs :
+ * The handleRecircPauseState function executes the pause state of the
+ * re-circulate mode state machine.
+ * @details Inputs: none
+ * @details Outputs: none
  * @return the next state
  *************************************************************************/
 static DG_RECIRCULATE_MODE_STATE_T handleRecircPauseState( void )
@@ -205,10 +210,9 @@
 
 /*********************************************************************//**
  * @brief
- * The requestDGStop function handles an HD request to stop (return to Standby mode).
- * @details
- * Inputs : none
- * Outputs : DG standby mode requested
+ * The requestDGStop function handles an HD request to stop (return to standby mode).
+ * @details Inputs: none
+ * @details Outputs: DG standby mode requested
  * @return TRUE if request accepted, FALSE if not.
  *************************************************************************/
 BOOL requestDGStop( void )
@@ -222,12 +226,11 @@
 
 /*********************************************************************//**
  * @brief
- * The getCurrentRecirculateState function returns the current state of the \n
+ * The getCurrentRecirculateState function returns the current state of the
  * re-circulate mode.
- * @details
- * Inputs : recircState
- * Outputs : none
- * @return the current state of re-circulate mode.
+ * @details Inputs: recircState
+ * @details Outputs: none
+ * @return the current state of re-circulate mode
  *************************************************************************/
 DG_RECIRCULATE_MODE_STATE_T getCurrentRecirculateState( void )
 {