38
ED 15117
Chiller Operating Mode (hvac_t [14])
All enumerations are not used for this data point. Only the following enumerations are used.
Value
Identifier
Notes
1
HVAC_HEAT
Heating only
3
HVAC_COOL
Cooling only
11
HVAC_ICE
Ice-making mode
Chiller State
In_Alarm
1= Chiller is in an alarm condition. This condition may also be observed in the Node
Object’s status.
0= No alarm condition.
Run_Enabled
1= Chiller starts if operating conditions are satisfied.
0= Chiller not permitted to run. Chiller may be in local mode or placed in an disabled
condition and can’t be run via a remote request.
Local
1= Chiller has been placed in a locally controlled mode of operation and cannot
respond to remote requests.
0= Chiller is not in local mode and network visible values maybe changed or
monitored remotely.
Limited
1= Chiller conditions may exist that prevents the Chiller from reaching setpoint.
0= Chiller is not restricted from attempting to reach setpoint.
CHW_flow
1= Chiller Water flow is detected.
0= No chilled water flow present.
CONDW_flow
1= Condenser Water flow has been detected
0= No condenser water flow is observed.
Clear Alarm Network
This read/write network variable clears all active alarms. The following alarms cannot be cleared over
the network. They can only be cleared via the unit controller OITS panel:
Low Evaporator Pressure
High Condenser Pressure
Evaporator Freeze Protect
Condenser Freeze Protect
High Motor Temperature
High Motor Gap Temperature
Mechanical High Pressure
Measurement
Units
Data Type
Usable Range
Default Value
NA NA Integer
Enumerated
0=Normal
BACnet
Object Identifier
Property Identifier
Object Type
Type Enumeration
Instance
Property Name
Property Enumeration
Binary Value
5
8
Present Value
85
Object Name
ClearAlarm
