Index: dialin/common/msg_defs.py
===================================================================
diff -u -r32e628abcbbd3fd70866505d9f2836a6f732ef06 -rb4dabd9b9976e6a202dd9265baeda21ec8f34551
--- dialin/common/msg_defs.py	(.../msg_defs.py)	(revision 32e628abcbbd3fd70866505d9f2836a6f732ef06)
+++ dialin/common/msg_defs.py	(.../msg_defs.py)	(revision b4dabd9b9976e6a202dd9265baeda21ec8f34551)
@@ -164,7 +164,9 @@
     REQUEST_REJECT_REASON_DG_RO_ONLY_MODE_INVALID_PARAMETER = 55
     REQUEST_REJECT_REASON_DG_RO_ONLY_MODE_INVALID_PAYLOAD_LENGTH = 56
     REQUEST_REJECT_REASON_TREATMENT_CANNOT_BE_RESUMED = 57
-    NUM_OF_REQUEST_REJECT_REASONS = 58
+    REQUEST_REJECT_REASON_EXCEEDS_MAXIMUM_HEPARIN_VOLUME = 58
+    REQUEST_REJECT_REASON_CHEM_DISINFECT_NOT_ENABLED_INST_CONFIG = 59
+    NUM_OF_REQUEST_REJECT_REASONS = 60
 
 
 class MsgFieldPositions:
Index: dialin/hd/institutional_record.py
===================================================================
diff -u -r621bb43cdd732ac9f81c4b2d0912c52bbbb084ab -rb4dabd9b9976e6a202dd9265baeda21ec8f34551
--- dialin/hd/institutional_record.py	(.../institutional_record.py)	(revision 621bb43cdd732ac9f81c4b2d0912c52bbbb084ab)
+++ dialin/hd/institutional_record.py	(.../institutional_record.py)	(revision b4dabd9b9976e6a202dd9265baeda21ec8f34551)
@@ -56,6 +56,7 @@
     _DEFAULT_MAX_HEPARIN_DISP_RATE_MLPHR =          1.0
     _DEFAULT_MIN_HEPARIN_BOLUS_VOLUME_ML =          0.0
     _DEFAULT_MAX_HEPARIN_BOLUS_VOLUME_ML =          2.0
+    _DEFAULT_ENABLE_CHEM_DISINFECT =                1
 
     _RECORD_SPECS_BYTES = 12
     _DEFAULT_TIME_VALUE = 0
@@ -330,6 +331,7 @@
                  'max_heparin_disp_rate_mlphr': ['<f', self._DEFAULT_MAX_HEPARIN_DISP_RATE_MLPHR],
                  'min_heparin_bolus_volume_ml': ['<f', self._DEFAULT_MIN_HEPARIN_BOLUS_VOLUME_ML],
                  'max_heparin_bolus_volume_ml': ['<f', self._DEFAULT_MAX_HEPARIN_BOLUS_VOLUME_ML],
+                 'enable_chemical_disinfect': ['<i', self._DEFAULT_ENABLE_CHEM_DISINFECT],
                  'calibration_time': ['<i', self._DEFAULT_TIME_VALUE],
                  'crc': ['<H', self._DEFAULT_CRC_VALUE]}})