Index: firmware/App/Controllers/BalancingChamber.c
===================================================================
diff -u -r2582d728ac1be6d159fa0ef37b1d443f09d7a168 -r8e93a6e39b2c7af5f0b47ef1272a2b53446fab0b
--- firmware/App/Controllers/BalancingChamber.c	(.../BalancingChamber.c)	(revision 2582d728ac1be6d159fa0ef37b1d443f09d7a168)
+++ firmware/App/Controllers/BalancingChamber.c	(.../BalancingChamber.c)	(revision 8e93a6e39b2c7af5f0b47ef1272a2b53446fab0b)
@@ -46,6 +46,7 @@
 #define SPENT_DIFF_COUNT_ZERO                       0                                           ///< Zero count difference for spent side fill comparing target count
 #define SPENT_DIFF_COUNT_DEADBAND                   1                                           ///< Stop changing D48 pump speed when fill difference reaches close to target count
 #define D48_SPEED_ADJUST_FACTOR                     0.5F                                        ///< D48 speed adjustment factor ( 50% of speed adjustment = 0.5)
+#define D48_SPEED_RANGE_LIMIT                       0.25F                                       ///< D48 speed adjustment range check limit ( D48 speed can vary +/-25% of initial calculated speed)
 
 /// Payload record structure for balancing chamber switch only request
 typedef struct
@@ -1189,6 +1190,10 @@
     U32 absDiffSpentFillCount       = 0;
     U32 adjustedSpeed               = 0;
     U32 spentDialPumpSpeed          = getD48PumpSpeedForBCFill();
+    U32 initialD48PumpSpeed         = calculateD48PumpSpeedForBCFill();
+    U32 minD48Speed                 = initialD48PumpSpeed - ( initialD48PumpSpeed * D48_SPEED_RANGE_LIMIT );
+    U32 maxD48Speed                 = initialD48PumpSpeed + ( initialD48PumpSpeed * D48_SPEED_RANGE_LIMIT );
+    U32 d48SpeedPostRangeCheck      = 0;
 
     // Collect the next sample of spent pressure
     lastPrevSpentDialPressure   = prevSpentDialPressure;
@@ -1217,8 +1222,10 @@
                 spentDialPumpSpeed -= adjustedSpeed;
             }
 
+            d48SpeedPostRangeCheck = RANGE( spentDialPumpSpeed, minD48Speed, maxD48Speed );
+
             // Update the D48 pump speed
-            setD48PumpSpeedForBCFill( spentDialPumpSpeed );
+            setD48PumpSpeedForBCFill( d48SpeedPostRangeCheck );
         }
 
         //Update spent fill is complete
Index: firmware/App/Controllers/DialysatePumps.c
===================================================================
diff -u -r830213bc6dcc1a684610caf78c79d55f2cb41e93 -r8e93a6e39b2c7af5f0b47ef1272a2b53446fab0b
--- firmware/App/Controllers/DialysatePumps.c	(.../DialysatePumps.c)	(revision 830213bc6dcc1a684610caf78c79d55f2cb41e93)
+++ firmware/App/Controllers/DialysatePumps.c	(.../DialysatePumps.c)	(revision 8e93a6e39b2c7af5f0b47ef1272a2b53446fab0b)
@@ -837,7 +837,23 @@
             }
         }
     }
+    else if ( TRUE == isDialPumpOpenLoopEnabled[ pumpId ] )
+    {
+        // Get current pump speed
+        dialysatePumps[ pumpId ].currentPumpSpeed = getDialysatePumpTargetSpeed( pumpId );
 
+        if ( D12_PUMP == pumpId )
+        {
+            //Set fresh dialyate pump speed
+            setFPGAD12PumpSpeed( (U16)dialysatePumps[ pumpId ].currentPumpSpeed );
+        }
+        else
+        {
+            //Set spent dialyate pump speed
+            setFPGAD48PumpSpeed( (U16)dialysatePumps[ pumpId ].currentPumpSpeed );
+        }
+    }
+
     return state;
 }
 
Index: firmware/App/Controllers/Valves.c
===================================================================
diff -u -r50144ec3e96785cf76d5bfd22ee65029c82e732b -r8e93a6e39b2c7af5f0b47ef1272a2b53446fab0b
--- firmware/App/Controllers/Valves.c	(.../Valves.c)	(revision 50144ec3e96785cf76d5bfd22ee65029c82e732b)
+++ firmware/App/Controllers/Valves.c	(.../Valves.c)	(revision 8e93a6e39b2c7af5f0b47ef1272a2b53446fab0b)
@@ -125,7 +125,7 @@
     readCommandedValveStates();
 
     // initially set valve PWM configuration and enable
-    setFPGAPWMConfigurations();
+    //setFPGAPWMConfigurations();
 
     // initially set all valves to de-energized state via FPGA
     setFPGADDValveStates( commandedValvesStates );
Index: firmware/App/Modes/ModeGenDialysate.c
===================================================================
diff -u -refed432eddd3b47deb44b68088e534ac539b47f6 -r8e93a6e39b2c7af5f0b47ef1272a2b53446fab0b
--- firmware/App/Modes/ModeGenDialysate.c	(.../ModeGenDialysate.c)	(revision efed432eddd3b47deb44b68088e534ac539b47f6)
+++ firmware/App/Modes/ModeGenDialysate.c	(.../ModeGenDialysate.c)	(revision 8e93a6e39b2c7af5f0b47ef1272a2b53446fab0b)
@@ -103,7 +103,6 @@
 static DD_GEND_MODE_STATE_T handleGenDIsolatedUFState( void );
 static F32 getGenDialysateTargetTemperature( void );
 static void calculateTargetDialysateTemp( void );
-static void calculateD48PumpSpeedForBCFill( void );
 static void updateDialysateToDialyzerFlowRate( void );
 static void checkDialysateTemperature( void );
 static void monitorChamberLevelStatus( void );
@@ -586,15 +585,17 @@
  * dialysate flow rate for continuous delivery of dialysate.
  * @details \b Inputs: Qd.
  * @details \b Outputs: D48 pump speed
- * @return none.
+ * @return calculated initial D48 pump speed.
  *************************************************************************/
-static void calculateD48PumpSpeedForBCFill( void )
+U32 calculateD48PumpSpeedForBCFill( void )
 {
     // Get the dialysate flow rate from TD
-    F32 dialFlowrate = getTDDialysateFlowrate();
+    F32 dialFlowrate  = getTDDialysateFlowrate();
 
     // D48 Pump Speed = (1.24 * Qd ) + 30.0
     d48PumpSpeed = (U32)( ( PUMP_SPEED_SLOPE_FACTOR * dialFlowrate ) +  PUMP_SPEED_INTERCEPT_FACTOR );
+
+    return d48PumpSpeed;
 }
 
 /*********************************************************************//**
Index: firmware/App/Modes/ModeGenDialysate.h
===================================================================
diff -u -refed432eddd3b47deb44b68088e534ac539b47f6 -r8e93a6e39b2c7af5f0b47ef1272a2b53446fab0b
--- firmware/App/Modes/ModeGenDialysate.h	(.../ModeGenDialysate.h)	(revision efed432eddd3b47deb44b68088e534ac539b47f6)
+++ firmware/App/Modes/ModeGenDialysate.h	(.../ModeGenDialysate.h)	(revision 8e93a6e39b2c7af5f0b47ef1272a2b53446fab0b)
@@ -59,6 +59,7 @@
 BOOL requestDDGenDialyasteStop( void );                     // Stop generate dialysate
 U32 getD48PumpSpeedForBCFill( void );                       // Get D48 pump speed
 void setD48PumpSpeedForBCFill( U32 pumpSpeed );             // Set D48 pump speed
+U32 calculateD48PumpSpeedForBCFill( void );                 // Calculate initial D48 pump speed
 
 BOOL testDDGenDialysateDataPublishIntervalOverride( MESSAGE_T *message );   // GenD Mode data publish interval override
 BOOL testDialDeliveryInProgressOverride( MESSAGE_T *message );              // To override the dialysate delivery in progress flag