Index: firmware/App/Modes/ModePreTreat.c
===================================================================
diff -u -ra25c11a9beb66c7292a184e3bc02a1a5ded5ed8a -r41885eaa6f8d4b38f57448bc6f6639867e8a8d24
--- firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision a25c11a9beb66c7292a184e3bc02a1a5ded5ed8a)
+++ firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision 41885eaa6f8d4b38f57448bc6f6639867e8a8d24)
@@ -253,7 +253,13 @@
  *************************************************************************/
 void signalUserConfirmInstallation( void )
 {
-    if ( ( MODE_PRET == getCurrentOperationMode() ) && ( HD_PRE_TREATMENT_CART_INSTALL_STATE == currentPreTreatmentState ) )
+    F32 bolusVol = getTreatmentParameterF32( TREATMENT_PARAM_HEPARIN_BOLUS_VOLUME );
+    F32 hepRate  = getTreatmentParameterF32( TREATMENT_PARAM_HEPARIN_DISPENSE_RATE );
+
+    // Accept installation confirmation if we are in install state of pre-treatment mode and syringe is detected or Heparin not being used in this treatment.
+    if ( ( MODE_PRET == getCurrentOperationMode() ) &&
+         ( HD_PRE_TREATMENT_CART_INSTALL_STATE == currentPreTreatmentState ) &&
+         ( ( TRUE == isSyringeDetected() ) || ( ( bolusVol < NEARLY_ZERO ) && ( hepRate < NEARLY_ZERO ) ) ) )
     {
         confirmInstallRequested = TRUE;
     }