Installation and Operation Manual
●
Fan Coil Controller – EZstat
EC-EZstat
Date: 9-2014
Supersedes: NEW
Engineered Comfort reserves the right to change any information concerning product or specification without notice or obligation.
Page 33 of 36
Table 8–7
Multi-state value objects
Schedule object
The EZstat occupancy state is controlled from a standard BACnet schedule object. The occupancy state is stored in the
reference object binary value object OCC_SCHEDULE. The exception schedule within the schedule object is represented in
the user interface as the holiday schedules.
Table 8-8
Schedule object
Operating states and modes
—the binary and multistate value objects represent operating conditions in the EZstat.
Objects BV5 and BV36 are related to the schedule.
Table 8–6
Binary value objects
Value object
Name
Description
BV5
OCC_SCHEDULE
Occupy Schedule
BV6
DAT_ENABLE
DAT Enable
BV7
DAT_SENSOR
DAT Sensor Present
BV9
FAN_NEED
Call for Fan
BV10
COOL_HEAT_NEED
Cooling or Heating needed
BV11
SPEED_UP
Speed up Timers x15
BV13
OCCUPIED_FAN
Fan On During Occupied Mode
BV14
FAN_STATUS
Fan Proof
BV15
MOD_FAN_ACTION
Modulating or Stepped Fan Action
BV16
AUTO_FAN_RESET
Reset Fan Back to Auto
BV18
CL_VLV_ACTION
Normal Close/Normal Open
BV19
HT_VLV_ACTION
Normal Close/Normal Open
BV20
COOL_STG_1
Cooling Stage 1
BV22
HEAT_STG_1
Heating Stage 1
BV28
LOCAL_OVRD
Local Override Mode
BV36
STPT_HOLD
Hold Temperature Setpoint
Value object
Name
Description
MSV1
OCCUPIED_MODE
Occupied Mode
MSV2
SYSTEM_MODE
Control Mode
MSV3
FAN_MODE
Fan Auto‑Manual Mode
MSV4
AVAILABLE_SPEEDS
Number of Fan Speeds Available
Object
Name
Description
Object Reference
1
SCHED_1
Schedule #1
BV5
Loop objects
The BACnet PID loops are used for valve and fan modulation, staging, economizer operation, and reheat during
dehumidification. The proportional and integral properties of the cooling and heating loops are available from the user
interface.
