Part
2. Functional Specifications
58
Design Guide
DCM014A51
10. Max Cooling Setpoint
Member number: 10
Object name:
Max Cooling Setpoint
Object type:
Analog Value
Description:
Monitors/configures the upper limit for the indoor unit
setpoint range (cool).
Present_Value property:
Upper 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 lower limit (cool) (Min Cooling
Setpoint) also changes to the same value along with Min Cooling Setpoint.
If the Max 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 Present_Value and setback temperature (cool) on the indoor
unit to the command from BMS.
Response to command
from BMS
Out_of_Service
property
Present_Value
Setpoint Restriction upper
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 32°C/90°F.
6. When subscribed to COV notification, the COV_Increment property is fixed to 1.0 and
cannot be changed.
COV notification is issued when a change of 1°C/1°F or more is detected.
