Index: firmware/App/Controllers/PresOccl.c
===================================================================
diff -u -r8121bf62592934e01f365a973ac813c3d4748cda -r2f0657170e95295bf2907aa4295b804c24e0242c
--- firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 8121bf62592934e01f365a973ac813c3d4748cda)
+++ firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 2f0657170e95295bf2907aa4295b804c24e0242c)
@@ -79,7 +79,7 @@
 #define VENOUS_PRESSURE_MAX_MMHG            ( 2000.0F )                                     ///< Maximum venous pressure reading (in mmHg) for range check.
 #define VENOUS_PRESSURE_MIN_MMHG            ( -1500.0F )                                    ///< Minimum venous pressure reading (in mmHg) for range check.
 #define VENOUS_PRESSURE_LIMIT_MAX_MMHG      ( 400.0F )                                      ///< Maximum venous pressure limit (in mmHg).
-#define VENOUS_PRESSURE_LIMIT_MIN_MMHG      ( 20.0F )                                       ///< Minimum venous pressure limit (in mmHg).
+#define VENOUS_PRESSURE_LIMIT_MIN_MMHG      (  0.0F )                                       ///< Minimum venous pressure limit (in mmHg).
 #define VENOUS_PRESSURE_OCCL_OFFSET_MMHG    ( 50.0F )                                       ///< Venous pressure occlusion threshold offset from max alarm limit (in mmHg).
 #define VENOUS_PRESSURE_EXEMPTION_PERIOD    ( ( 2 * MS_PER_SECOND ) /  \
                                                TASK_GENERAL_INTERVAL )                      ///< Venous pressure low exemption period (in task interval) after fill for all blood flow rate
Index: firmware/App/Modes/BloodPrime.c
===================================================================
diff -u -r736cc5b56cc9c784ab1d8fc8687a73d190c35759 -r2f0657170e95295bf2907aa4295b804c24e0242c
--- firmware/App/Modes/BloodPrime.c	(.../BloodPrime.c)	(revision 736cc5b56cc9c784ab1d8fc8687a73d190c35759)
+++ firmware/App/Modes/BloodPrime.c	(.../BloodPrime.c)	(revision 2f0657170e95295bf2907aa4295b804c24e0242c)
@@ -39,7 +39,7 @@
 #define MIN_RAMP_TIME_SEC                          60                       ///< Minimum ramp time for blood prime (in seconds).
 
 /// Initial flow rate for blood pump when starting blood prime operation.
-#define BLOOD_PRIME_INIT_BP_FLOW_RATE_ML_MIN       100
+#define BLOOD_PRIME_INIT_BP_FLOW_RATE_ML_MIN       250
 
 /// Interval at which blood prime ramping is controlled.
 static const U32 BLOOD_PRIME_RAMPING_INTERVAL    = ( MS_PER_SECOND / TASK_GENERAL_INTERVAL );
@@ -85,6 +85,8 @@
 void initBloodPrime( void )
 {
     U32 setBPRate = getTreatmentParameterU32( TREATMENT_PARAM_BLOOD_FLOW );
+    F32 rampRateSpan = 0.0F;
+    F32 estRampSeconds = 0.0F;
 
     bloodPrimeState = BLOOD_PRIME_RAMP_STATE;
     bloodPrimeRampControlTimerCtr = 0;
@@ -94,22 +96,16 @@
 
     bloodPrimeTargetVolume_mL = (F32)TUBING_BLOOD_PRIME_VOLUME_ML + (F32)getDialyzerBloodVolume();
     bloodPrimeRampFlowRate_mL_min = (F32)BLOOD_PRIME_INIT_BP_FLOW_RATE_ML_MIN;
+
     // Calculate BP ramp step size
-    if ( setBPRate <= BLOOD_PRIME_INIT_BP_FLOW_RATE_ML_MIN )
+    rampRateSpan = (F32)( setBPRate - BLOOD_PRIME_INIT_BP_FLOW_RATE_ML_MIN );
+    estRampSeconds = ( ( bloodPrimeTargetVolume_mL / (F32)setBPRate + bloodPrimeTargetVolume_mL / (F32)BLOOD_PRIME_INIT_BP_FLOW_RATE_ML_MIN ) / 2.0 ) * (F32)SEC_PER_MIN;
+
+    if ( estRampSeconds < (F32)MIN_RAMP_TIME_SEC )
     {
-        bloodPrimeRampStep_mL = 0.0;
+        estRampSeconds = (F32)MIN_RAMP_TIME_SEC;
     }
-    else
-    {
-        F32 rampRateSpan = (F32)( setBPRate - BLOOD_PRIME_INIT_BP_FLOW_RATE_ML_MIN );
-        F32 estRampSeconds = ( ( bloodPrimeTargetVolume_mL / (F32)setBPRate + bloodPrimeTargetVolume_mL / (F32)BLOOD_PRIME_INIT_BP_FLOW_RATE_ML_MIN ) / 2.0 ) * (F32)SEC_PER_MIN;
-
-        if ( estRampSeconds < (F32)MIN_RAMP_TIME_SEC )
-        {
-            estRampSeconds = (F32)MIN_RAMP_TIME_SEC;
-        }
-        bloodPrimeRampStep_mL = rampRateSpan / estRampSeconds;
-    }
+    bloodPrimeRampStep_mL = rampRateSpan / estRampSeconds;
 }
 
 /*********************************************************************//**