Part
2. Functional Specifications
DCM014A51
Design Guide
59
The next COV notification is issued when the temperature further changes for 1°C/1°F or
more from the value of the Present_Value property that triggered the previous COV
notification.
11. Min Cooling Setpoint
Member number: 11
Object name:
Min Cooling Setpoint
Object type:
Analog Value
Description:
Monitors/configures the lower limit for the indoor unit
setpoint range (cool).
Present_Value property:
Lower limit for the setpoint range (cool) on the indoor unit
Notes:
1. The unit is degrees Celsius (°C) or degrees Fahrenheit (°F), depending on the system
settings.
2. The number of significant digits is up to one decimal place for degrees Celsius and zero
decimal places for degrees Fahrenheit.
3. The settable values are between the upper and lower limits of the indoor unit cooling
setpoint.
If a value outside the range is written, it is corrected to the upper/lower limit value.
4. Out_Of_Service property
If TRUE:
The Setpoint Restriction (cool) is disabled.
If FALSE: The Setpoint Restriction (cool) is enabled.
If value is changed from the
BACnet
:
The Out_Of_Service property of the Setpoint Restriction upper limit (cool).
(Max Cooling Setpoint) also changes to the same value along with Max Cooling Setpoint.
If the Min Cooling Setpoint point is set by the
iTM
, the BMS does not need to change the
Out_Of_Service property unless a value change is needed.
The following table shows the correspondence between the Out_Of_Service property
status and the response of the Present_Value and Setpoint Restriction lower limit (cool)
on the indoor unit to the command from the BMS.
Response to command
from BMS
Out_Of_Service
property
Present_Value
Setpoint Restriction lower
limit (cool)
TRUE
Error
ErrorClass=PROPERTY
ErrorCode=WRITE_ACCESS_DENIED
No change
FALSE
Change
←
When the Out_Of_Service property changes from TRUE to FALSE, the Present_Value
changes to the value set on the
iTM
.
5. Relinquish_Default property is fixed to 16°C/60°F.
6. When subscribed to COV notification, the COV_Increment property is fixed to 1.0 and
cannot be changed.
