Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -rf5d4fecd7b937ddf8e8b4ef3372541e79c7a44fc -r14be630db3ca775cc0e76669b585f62f00ae518e
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision f5d4fecd7b937ddf8e8b4ef3372541e79c7a44fc)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 14be630db3ca775cc0e76669b585f62f00ae518e)
@@ -30,6 +30,7 @@
 #include "ModeStandby.h"
 #include "ModeTreatment.h"
 #include "ModeTreatmentParams.h"
+#include "NVDataMgmt.h"
 #include "OperationModes.h"
 #include "RTC.h"
 #include "Switches.h"
@@ -453,10 +454,16 @@
         {
             if ( TRUE == isDGCommunicating() )
             {
-                setRequestedCleaningMode( DG_MODE_CHEM );
-                result              = TRUE;
-                currentStandbyState = STANDBY_WAIT_FOR_DISINFECT_STATE;
-                rejReason           = REQUEST_REJECT_REASON_NONE;
+                // Assume chemical disinfect is not enabled in institutional record unless otherwise has been specified.
+                rejReason = REQUEST_REJECT_REASON_CHEM_DISINFECT_NOT_ENABLED_INST_CONFIG;
+
+                if ( TRUE == isChemDisinfectEnabledInInstitRecord() )
+                {
+                    setRequestedCleaningMode( DG_MODE_CHEM );
+                    result              = TRUE;
+                    currentStandbyState = STANDBY_WAIT_FOR_DISINFECT_STATE;
+                    rejReason           = REQUEST_REJECT_REASON_NONE;
+                }
             }
             else
             {