Index: firmware/App/Modes/BalancingChamber.h
===================================================================
diff -u -r6679a2cd813b21a8cb4c58b3eeb721e0eef9a10b -rbc30c54270ec51f947b129da3c7daad54ec4eb5f
--- firmware/App/Modes/BalancingChamber.h	(.../BalancingChamber.h)	(revision 6679a2cd813b21a8cb4c58b3eeb721e0eef9a10b)
+++ firmware/App/Modes/BalancingChamber.h	(.../BalancingChamber.h)	(revision bc30c54270ec51f947b129da3c7daad54ec4eb5f)
@@ -31,6 +31,11 @@
 
 // ********** public definitions **********
 
+#define FRESH_DIAL_PRESSURE_MIN_PSIG                21.0F                                       ///< Minimum fresh dialysate pressure (PDf) limit for balancing chamber fill operations.
+#define FRESH_DIAL_PRESSURE_MAX_PSIG                27.0F                                       ///< Maximum fresh dialysate pressure (PDf) limit for balancing chamber fill operations.
+#define SPENT_DIAL_PRESSURE_MIN_PSIG                27.0F                                       ///< Minimum spent dialysate pressure (PDs) limit for balancing chamber fill operations.
+#define SPENT_DIAL_PRESSURE_MAX_PSIG                31.0F                                       ///< Maximum spent dialysate pressure (PDs) limit for balancing chamber fill operations.
+
 /// balancing chamber data structure
 typedef struct
 {
@@ -41,6 +46,7 @@
     BOOL isBalChamberFillInProgress;                    ///< Whether balancing chamber fill in progress or not
     U32 currentBalChamberSwitchingCounter;              ///< Current balancing chamber switching counter
     BOOL isPressureStalbilizedDuringFill;               ///< Whether pressure stabilized during fill or not
+    BOOL balChamberSWOnlyState;                         ///< Balancing chamber switching only status ( On/Off)
 } BAL_CHAMBER_DATA_T;
 
 // ********** public function prototypes **********
@@ -56,9 +62,12 @@
 BOOL getBalancingChamberFillinProgressStatus( void );                    // Get the balancing chamber fill in progress status
 void valveControlForBCClosedState( void );                               // Closes all balancing chamber valves
 void valveControlForBCOpenState( void );                                 // Open all balancing chamber valves
+BOOL getBalChamberSwitchingOnlyStatus( void );                           // Get balancing chamber switching only status
+void setBalChamberSwitchingOnlyStatus( BOOL OnOff );                     // Set balancing chamber switching only status
 
 BOOL testDDBalChamberDataPublishIntervalOverride( MESSAGE_T *message );  // To override the balancing chamber data publish interval
 BOOL testBalChamberSwFreqOverride( MESSAGE_T *message );                 // To override the balancing chamber switching frequency
+BOOL testBCSwitchOnlyStartStopOverride( MESSAGE_T *message );            // To override the balancning chamber switching only start/stop control
 
 /**@}*/