Index: firmware/App/Modes/Prime.c
===================================================================
diff -u -r7b9f88168b56fecff1a4e1ccdbd494c1a1b28fff -r5ce2656c662525e10acd1e55f16f7aca5ce9b4d6
--- firmware/App/Modes/Prime.c	(.../Prime.c)	(revision 7b9f88168b56fecff1a4e1ccdbd494c1a1b28fff)
+++ firmware/App/Modes/Prime.c	(.../Prime.c)	(revision 5ce2656c662525e10acd1e55f16f7aca5ce9b4d6)
@@ -7,8 +7,8 @@
 *
 * @file    Prime.c
 *
-* @author  (last)      Dara Navaei
-* @date    (last)      17-Oct-2022
+* @author  (last)      Sean Nash
+* @date    (last)      02-Dec-2022
 *
 * @author  (original)  Quang Nguyen
 * @date    (original)  08-Dec-2020
@@ -36,7 +36,7 @@
 
 // ********** private definitions **********
 
-#define MAX_PRIME_TIME                                      ( 15 * SEC_PER_MIN )                               ///< Maximum prime time (in seconds).
+#define MAX_PRIME_TIME                                      ( 30 * SEC_PER_MIN )                               ///< Maximum prime time (in seconds).
 #define PRIME_DATA_PUB_INTERVAL                             ( MS_PER_SECOND / TASK_GENERAL_INTERVAL )          ///< Interval (ms/task time) at which the prime data is published on the CAN bus.
 
 #define BLOOD_PUMP_FAST_FLOW_RATE_PURGE_AIR_ML_MIN          300                                                ///< Blood pump fast flow rate to fill fluid.
@@ -46,6 +46,7 @@
 #define BLOOD_PUMP_FAST_FLOW_RATE_CIRC_BLOOD_CIRCUIT_ML_MIN 300                                                ///< Blood pump fast flow rate during prime recirculate blood circuit state.
 #define BLOOD_PUMP_FLOW_RATE_SALINE_DIALYZER_ML_MIN         300                                                ///< Blood pump flow rate during prime the saline dialyzer dialysate state.
 #define DIALYSATE_PUMP_PRIME_FLOW_RATE_ML_MIN               300                                                ///< Dialysate pump flow rate during priming fluid path.
+#define DPO_PUMP_PRIME_FLOW_RATE_ML_MIN                     225                                                ///< Dialysate outlet pump flow rate needed to match PWM with dialysate inlet pump @ 300 mL/min in open loop mode.
 
 #define DIALYSATE_DIALYZER_TUBE_VOLUME_ML                   115                                                ///< This total tube volume is used to calculate the Dpi & Dpo time out in the dialysate dialyzer state.
 #define DIALYSATE_DIALYZER_BYPASS_TUBE_VOLUME_ML             75                                                ///< This volume is used to calculate the DPi pump time out in the dialyzer bypass state.
@@ -589,8 +590,11 @@
 
     if ( TRUE == getReservoirFillStatus( DG_RESERVOIR_1 ) )
     {
-        cmdSetDGActiveReservoir( DG_RESERVOIR_1 );
+        DG_SWITCH_RSRVRS_CMD_T rsrvrCmd;
 
+        rsrvrCmd.reservoirID            = (U32)DG_RESERVOIR_1;
+        rsrvrCmd.useLastTrimmerHeaterDC = FALSE;
+
         if ( TRUE == hasDGCompletedReservoirSwitch() )
         {
             U32 dialyzerDialysateVolume = getDialyzerDialysateVolume();
@@ -603,7 +607,7 @@
 
             signalBloodPumpHardStop();
             setDialInPumpTargetFlowRate( DIALYSATE_PUMP_PRIME_FLOW_RATE_ML_MIN, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
-            setDialOutPumpTargetRate( DIALYSATE_PUMP_PRIME_FLOW_RATE_ML_MIN, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
+            setDialOutPumpTargetRate( DPO_PUMP_PRIME_FLOW_RATE_ML_MIN, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
 
             // Calculate the time out value that must passed prior to checking for the steady state volume in the reservoir
             primeDialysateDialyzerTimeLimit = (U32)( ( ( DIALYSATE_DIALYZER_TUBE_VOLUME_ML + dialyzerDialysateVolume ) * SEC_PER_MIN * MS_PER_SECOND ) / DIALYSATE_PUMP_PRIME_FLOW_RATE_ML_MIN );
@@ -770,8 +774,13 @@
 
     if ( TRUE == getReservoirFillStatus( DG_RESERVOIR_2 ) )
     {
-        cmdSetDGActiveReservoir( DG_RESERVOIR_2 );
+        DG_SWITCH_RSRVRS_CMD_T rsrvrCmd;
 
+        rsrvrCmd.reservoirID            = (U32)DG_RESERVOIR_1;
+        rsrvrCmd.useLastTrimmerHeaterDC = FALSE;
+
+        cmdSetDGActiveReservoir( &rsrvrCmd );
+
         if ( TRUE == hasDGCompletedReservoirSwitch() )
         {
             signalBloodPumpHardStop();