Index: firmware/App/Modes/Prime.c
===================================================================
diff -u -r9a96522e0a94724a13c2c9c8f60cf8d18ebde218 -r13566683581f46d3fc818425511572bb708ed6e8
--- firmware/App/Modes/Prime.c	(.../Prime.c)	(revision 9a96522e0a94724a13c2c9c8f60cf8d18ebde218)
+++ firmware/App/Modes/Prime.c	(.../Prime.c)	(revision 13566683581f46d3fc818425511572bb708ed6e8)
@@ -51,7 +51,7 @@
 #define DIALYZER_VOLUME_SCALE_FACTOR                        0.5F                                               ///< Half of the dialyzer total volume.
 
 #define NO_AIR_DETECTED_COUNT                               ( 40 * MS_PER_SECOND )                             ///< No air detected time period count.
-#define PURGE_AIR_TIME_OUT_COUNT                            ( 120 * MS_PER_SECOND )                             ///< Time period count for purge air time out.
+#define PURGE_AIR_TIME_OUT_COUNT                            ( 120 * MS_PER_SECOND )                            ///< Time period count for purge air time out.
 #define PRIME_SALINE_DIALYZER_TIME_OUT_COUNT                ( 60 * MS_PER_SECOND )                             ///< Time period count for prime saline dialyzer time out.
 #define LOAD_CELL_STEADY_VOLUME_SAMPLING_TIME               (  1 * MS_PER_SECOND )                             ///< Time load cell reading steady state detection sampling time in seconds.
 #define PRIME_DIALYSATE_BYPASS_TIME_LIMIT                   ( 15 * MS_PER_SECOND )                             ///< Time limit for priming dialysate bypass circuit.
@@ -429,7 +429,7 @@
 
     signalDialOutPumpHardStop();
     signalDialInPumpHardStop();
-    if (FALSE == primeFirstPurgePass )
+    if ( FALSE == primeFirstPurgePass )
     {
         setBloodPumpTargetFlowRate( BLOOD_PUMP_FAST_FLOW_RATE_PURGE_AIR_ML_MIN, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
     }
@@ -514,7 +514,14 @@
 
     if ( AIR_TRAP_LEVEL_FLUID == getAirTrapLevel( AIR_TRAP_LEVEL_SENSOR_LOWER ) )
     {
-        setBloodPumpTargetFlowRate( BLOOD_PUMP_SLOW_FLOW_RATE_PURGE_AIR_ML_MIN, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
+        if ( FALSE == primeFirstPurgePass )
+        {
+            setBloodPumpTargetFlowRate( BLOOD_PUMP_FAST_FLOW_RATE_PURGE_AIR_ML_MIN, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
+        }
+        else
+        {
+            setBloodPumpTargetFlowRate( BLOOD_PUMP_SLOW_FLOW_RATE_PURGE_AIR_ML_MIN, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
+        }
     }
 
     if ( AIR_TRAP_LEVEL_FLUID == getAirTrapLevel( AIR_TRAP_LEVEL_SENSOR_UPPER ) )